Abstract:As a basic part of the health monitoring system of five-hundred-meter aperture spherical telescope(FAST),the data acquisition system was researched in the paper.The sensors used for FAST were chosen considering the antologous characters of the sensors,and a;ardware system was designed based on the chosen sensors.A software system for FAST was developed using the Labview software,so a data acquisition system based on virtual instrument technology was established.Successfully application of the data acquisition system during the experiment on the FAST 30 m-model,which is an important step of FAST,affirms its support for the health monitoring system of FAST.

Abstract:In order to get the shape factor of wind load on the stadium,numerical simulation of wind pressure distribution was performed on the stadium for Shenzhen universiade based on the Reynolds-averaged N -S equations and Reynolds stress equation model(RSM).The finite volume method was employed to discretize the governing differential equations and the SIMPLE pressure correction iteration algorithm was adopted to solve the nonlinear equations.Numerical results are found to have good agreement with experimental results.On this basis,the characteristics of wind pressure distribution and the flow field characteristics were discussed by considering wind direction and wind attack angles.At last,according to the roof shape and the regularity of wind pressure distribution,mean wind pressure coefficients of regions were provided.The results show that wind direction has great influence on the separation and vortex shedding of the wind flow.The angle of attack has little influence on the wind pressure distribution on the roof,its influence on the local peak value is less than 15% and that on the whole influence is less than 5%.

Abstract:The shake table test for studying the pile-soil-structure seismic interaction in liquefiable ground was carried out,and the characteristics of seismic response of the structure were investigated.Results show that under small seismic input,the dynamic response of foundation is relatively small,while the pore pressure reaches its peak within several seconds after the peak input acceleration time and then,almost immediately,begins to dissipate.Slight liquefaction occurs in the upper sand layer,and the difference of peak pore pressure between far-pile area and near-pile area is very little.The dynamic deformation of pile-pier manifests specific elasticity,and the confinement effect of foundation on the seismic response of the pile cannot be neglected.The dynamic strain of pile in sand is larger than that in clay.On the other hand,the dynamic strain of pile in clay is much larger than that of pier,due to the co-action of confinement effect of upper clay on the pile and counterweight inertia effect of the pier top.While inputting the large seismic wave,complete liquefaction,accompanied by strong shear flow,occurs in a short time.The pore pressure increases immediately after the peak input acceleration time,then increases to its peak gradually,and the dissipation rate is also very low.The peak pore pressure of near-pile area,different from the case of small seismic input,is much larger than that of far-pile area.Dynamic response of pile-pier is quite violent,and the fixing point of pile greatly moves upwards,as a result of large counterweight inertia effect together with complete liquefaction in sand.A large range of damage locates around the interface of sand and upper clay layers,and the pile breaks in the clay layer.

Abstract:The organic epoxy adhesive usually used in the concrete structures strengthened with CFRP sheets has low softening temperatures of 60-80℃ and it is difficult to meet the requirement of fire endurance,therefore,an inorganic adhesive is developed and used to bond CFRP sheets to strengthen concrete beams,whose strength at 600℃ is not lower than that at normal room temperature.Experiments on mechanical properties of four strengthened beams that experienced fire test were completed.The flexural failure processes of beams were observed.Flexural carrying capacity of these beams and the load-displace curves at the mid-span were obtained.Flexural carrying capacity was analyzed.The calculation formula of flexural carrying capacity and the calculation method of stiffness were presented.The experimental and analysis results show that the strength of CFRP sheets bonded with the inorganic adhesive can not be played fully when the temperature CFRP sheets experienced is above 300℃ in fire.The calculation values of formula are in good agreement with test results.The formula can be used for computing flexural carrying capacity and stiffness of this kind of beam.

Abstract:In order to solve the problem that the control of deflection for prestressed concrete flexural member is not perfect in the current standards and references at home and abroad,combined with the actual practice,the allowable upward deformation was presented after calculation.The influence factors on upward deformation of prestressed concrete flexural member was analyzed,and the method through limiting the effective compressive stress to indirectly control the upward deformation of prestressed concrete flexural member was discussed.For prestressed concrete slabs,the allowable value for the effective compressive stress in the critical section was presented with the following influence factors:span,ratio of span to depth of section and the location of prestressed steel.For prestressed concrete beam,the variability of the effective compressive stress in the critical section was presented with the following influence factors:span,ratio of span to depth of section and load-bearing range.In addition,the calculation formulas of the allowable values for the effective compressive stress in the critical section of prestressed concrete beam were obtained.

Abstract:In order to deduce unified expressed formulas of stiffness and crack width of concrete beams partially prestressed with unbonded CFRP tendons,the equivalent reduced coefficient of unbonded CFRP tendons is defined as the ratio of the stress increment of unbonded CFRP tendons to that of bonded steel bars.If the ratio of longitudinal tension reinforcement in the stiffness formula in current code is replaced by the ratio of the sum of the equivalent reduced area of unbonded CFRP tendons and the area of steel bars to effective cross-sectional area,and the area of total longitudinal tension reinforcement in the crack width formula in current code is replaced by the sum of the equivalent reduced area of unbonded CFRP tendons and the area of steel bars,the stiffness formula and crack width formula in accordance with current code can be developed.The calculated results by using these two formulas are in good agreement with test results.

Abstract:Two groups of specimens including 8 stub columns were tested to study the effect of bond stress between steel tube and core concrete on the axial loaded behavior of tubed high-strength stub columns(HSC).Each group included two columns without bond stress and two columns with bond stress.Elastic-plastic analysis on the steel tube during the loading procedure was carried out.The results from test and analysis indicate that the longitudinal stress of the steel tube is evidently decreased in respect that the bond effect is eliminated,while the bond stress has little effect on the axial load strength and ductility of tubed HSC.Therefore it is not necessary to eliminate the bond effect between the steel tube and the core concrete in structural engineering.

Abstract:In this paper the numerical simulation on steel plate shear wall(SPSW) and steel-concrete composite shear wall(SCSW) with two-side connection was carried out by the finite element software ANSYS.Performances of the two shear walls were investigated.Different mechanical behaviors between SPSW and SCSW with two-side connection were discussed in details.It is found that the depth-thickness ratio λ is a key parameter that influences the shear resistance behavior of SPSW with two-side connection.The concrete plate which completely restricts the out-of-plate displacement may be thin if the depth-thickness ratio of a wall is large enough.Due to the concrete plate supporting,stress distributions in the SCSW are changed obviously:the horizontal load transferring manners are changed from tension strip to cross-sectional shear in the steel plates.

Abstract:As a new type of shear wall,steel plate-concrete composite shear wall can avoid shear yielding and adjust stiffness of structure by opening vertical slits.This paper conducts a finite element simulation by ANSYS,and effects of span-to-height ratio,height-to-thickness ratio and the thickness of concrete panels on the ultimate capacity and stiffness of steel plate-concrete composite shear wall without slits are studied.Meanwhile,effects of span-to-height ratio,height-to-thickness ratio,the thickness of concrete panels and height-to-thickness ratio of columns between slits on shear walls with slits are analyzed,and the shear properties are compared between shear walls without slits and shear walls with slits.It is indicated that the ultimate capacity of steel plate-concrete composite shear walls is evidently improved by constraint effects of concrete panels;the ultimate capacity is reduced after opening slits,but the ultimate capacity and initial stiffness can be adjusted by changing characteristics of opening slits;the and ultimate capacity of shear walls is evidently affected by span-to-height ratio,height-to-thickness ratio and the thickness of concrete panels.

Abstract:In order to research the seismic performance of reinforced concrete block shear walls(RCBSW),this paper has developed a new fiber element model that considers the elastic-plastic shear deformation.The comparison between experimental results and simulation results of 6 RCBSW organized under the same conditions shows that this new fiber element can preferably simulate the hysteretic performance of RCBSW.Although the ordinary fiber element model is still suitable to simulate the hysteretic performance of RCBSW conditionally,it brings on better results for this new fiber element.Based on the above research,after some numerical simulation on uniform design experimentation method,a series of empirical formulas of characteristic parameter of a kind of RCBSW is induced and the hysteretic model for elastic-plastic seismic response analysis of this kind of RCBSW is proposed.

Abstract:To demonstrate the feasibility of inverting wheel-rail impact source based on observation data,the method of virtual inversion is adopted.Firstly,a setting function was given to describe the source,and the corresponding vertical displacement time histories of the observation array were obtained by means of an existing analytical solution.Spectrum analysis was performed on the displacement time histories.Then taking the power spectrum as the objective function,the intensity of the source function and the velocity of the train were inversed by means of the micro-genetic algorithm.Test results show that the error is very small by using the power spectrum of two points as the objective function to inverse the vibration source parameters.Genetic algorithm is reliable in the research of vibration source characteristic,which provides a theoretical foundation for further application of genetic algorithm in the research of the random vibration source function.

Abstract:Fiber-reinforced cement composites(FRCs) with multi-walled carbon nanotubes(MWNTs) loadings were fabricated with ultrasonic surfactant dispersion and subsequently casting-mix method.The effect of different MWNTs loadings(w),wets(X) and pressures(σ) on the volume resistivity(ρv) of six groups of FRCs was investigated respectively.Results show that the ρv of FRC steadily falls down with the increment of w,and it is only a round 1.83 kΩ·cm with w being 2% ;except for NFC5 group with w being 2%,those ρv of other five groups of specimens are all sensitive to the correspondent X,especially when the diffusion gradient of water is rather high;except for the plain NFC0,there exist somewhat pressure-sensitive features for other five groups of specimens.However,only the fractional change in ρv(Δρv) of NFC3 group with w being 0.5% has distinct and steady descending trend,and it well exhibits the characteristics of micro cracks during occurring,developing and merging with the increment of σ.

Abstract:In order to extend the application of ClO2 in drinking water safety,the influences of ClO2 dosage,contact time,temperature and pH value on the killing effect of oocyst were investigated using fluorescent staining vital assessing method.SEM was used to study the changes of oocyst shaped in the sterilization process.The results show that the killing rate can reach 90% and 100% at the ClO2 dosages of 1.5 and 2.5 mg/L respectively when the contact time is 60 min.Higher killing rate can be obtained at higher temperature.The killing rate can increase from 54% to 70% when the temperature is raised from 5℃ to 30℃.The effect of pH value is not obvious.By comparing the SEM photos before and after sterilization,it can be found that ClO2 has great penetrability and does not destroy the oocyst surface but transforms the supporting structure.All the results indicate that ClO2 can be used to control Cryptosporidium oocyst in drinking water treatment and they provide a theoretical foundation for the engineering application.

Abstract:In order to investigate the efficiency of chlorine dioxide on disinfecting Giardia in water,a fluorescence staining method was employed to eveluate the effect of chlorine dioxide inactivating Giardia affected by different factors.The results show that the optimum disinfection effect(the survival rate of less than 1%) can be achieved when adding of 2.0 mg/L ClO2 after 30 min(pH=7.0,25℃ and turbidity of 1 NTU).Turbidity is one important factor affecting inactivation.The survival rate of Giardia cysts has a non-linear negative correlation with chlorine dioxide concentration and reaction time.The acidic condition is a little better than alkaline condition.Concentrations of organic matter can inhibit the disinfecting effect of ClO2 to some extent.

Abstract:Aspartic acid-glutamic acid copolymer has good inhibition to CaSO4 and CaCO3.In order to ensure its application security in various fields,scale inhibition mechanism of PAG was studied.X-ray diffraction(XRD) and scanning electron microscopy(SEM) were used to analyze CaCO3 crystal and CaSO4 crystal with and without the scale inhibitor.And fractal dimension of CaCO3 crystal was calculated.The results show that the configuration of CaCO3 crystal lattice has been changed,the structure of CaSO4 crystallite has been broken.The main mechanisms of PAG inhibition to CaCO3 crystal and CaSO4 crystal are lattice distortion and cohesion and the following dispersion respectively.

Abstract:In the process of destabilization and aggregation of aquatic colloidal particles,different mechanisms of agglomerants,coagulants and flocculants were analyzed.Classification and representatives of coagulants and flocculants in water treatment were introduced from such aspects as chemical composition,molecular weight,production source and nature of functional groups.Different technical characteristics between combination effect of flocculants and compound flocculants were put forward.The properties and development of microbial compound flocculants and the combination effect between bioflocclant and other flocculants were investigated.

Abstract:The shift of nitrifier population within a partial nitrification reactor was investigated using fluorescence in-situ hybridization(FISH) techniques and the floc morphology was observed using scan electron microscope(SEM).Partial nitrification to nitrite was achieved quickly by using real-time aeration duration control when domestic wastewater was treated in a lab-scale sequencing batch reactor(SBR).The average nitrite accumulation ratio was above 93%.The morphology photographs observed using SEM indicated that the sludge showed a shift towards spherical and small rod-shaped clusters from the diverse morphology.FISH analysis showed that ammonia-oxidizing bacteria(AOB) gradually out-competed nitrite-oxidizing bacteria(NOB).AOB population percentage increased from 3.5%(during the start-up period) to 8.5%(after achieving nitritation for 102 days),while NOB population percentage decreased from 3.1% to less than 0.5%.Accordingly,the long-term operation with the use of real-time aeration duration control was not only favorable for AOB community optimisation,but also for the achievement of partial nitrification in practice.

Abstract:Simulation on water distribution network system and static pipe section reactor was carried out to study the formation of dissolved organic halide in water supply pipes.And the effect factors were studied.The results show that DOX increases with UV254 and Br-,but decreases with the increase of ammonia nitrogen.Static pipe wall experiments show that,when the temperature is 20℃ and pH is 8.6,corrosion products inhibit the formation of DOX and make it reduced by 7.5%.This may be caused by the unstable pH value.The impact of pipe material on DOX is as follows:PVC pipe > stainless steel pipe > ductile cast iron pipe.Under the same distance or the same retention time,the generation of DOX is the lowest at the velocity of 0.6 m/s.

Abstract:To investigate pathway and possible removal mechanisms of 17α-ethinylestradiol(EE2) in ecopond systems(algae ponds and duckweed ponds) for wastewater treatment,all of the laboratory scale batch tests,dynamic sorption tests and continuous flow tests were conducted to study the effect of sorption and biodegradation on EE2 removal.EE2 concentrations were detected by enzyme-linked immunosorbent assay(ELISA).The 6-day batch tests showed that the introduction of duckweed and algae into wastewater could enhance EE2 removal rate.In the 180-min dynamic sorption tests,about 25% and 80% of EE2 were sorbed by algae and duckweed respectively,which means occurrence of the swift sorption,while the mass balances indicated that only about 6% of the estrogens were bound to the biomass of algae or duckweed at the end of the 6-day tests,implying that EE2 was rapidly removed by sorption at the initial stage,while the sorbed EE2 was subsequently eliminated by biodegradation.Results of continuous flow tests revealed that even at ng/L level,EE2 could also be removed in algae and duckweed pond systems.Sorption and biodegradation are the main removal mechanisms of EE2 in eco-pond systems.

Abstract:In order to exploit the adsorption principle of bromate adsorbed onto the activated carbon,the effect of physical and chemical characters of the activated carbon surface on the bromate adsorption was studied.Tangshan activated carbon,Merck activated carbon and Xinhua activated carbon were compared in the experiment.Effects of the pore size and volume as well as the functional group distribution on the bromate adsorption were researched.The results show that Merck activated carbon which has the largest amount of mesopores has the best adsorption capability.Moreover,the surface of Merck activated carbon has the largest amount of lactones,which plays a positive role in the bromate removal.At last,the adsorption isotherms of the three activa-ted carbons were measured.It is found that the adsorption of Merck activated carbon is the highest,that of Xinhua activated carbon is the lowest and that of Tangshan activated carbon is in the middle.

Abstract:To solve the problem about the evaluation of forest air,an eveluation model based on BP neural network was studied.According to the characteristics of forest air with low pollution and high-volume negative ions,the model was constructed by MATLAB with the indices of SO2,NO2,PM10,O3 and negative ion.The evaluation results are 9.13 and 8.56 respectively by comparing the statistic data of air quality in forest with those in the town in Yichun,which proves the feasibility of the model.

Abstract:For effective utilization of residual sludge,biosorption experiments of Cu2+ and Cd2+ were carried out using waste activated sludge from municipal sewage treatment plant as adsorption material,and the effects of pH value,temperature,reaction time,sludge quantity and initial solution concentration on the adsorption efficiency were studied through static state experiment.Results indicate that temperature has no significant effect on the adsorption,while pH value is the most important factor in the adsorption process and the increase of sludge quantity will enhance the adsorption capacity greatly.Besides,the adsorption process of Cu2+ and Cd2+ is in accordance with Langmuir isotherm and Freundlich model,and the maximum adsorption amounts at room temperature(20±2℃) are 32.4 mg/g and 30.2 mg/g respectively.It is indicated that the residual sludge can be used as an effective biosorbent for the removal of heavy metals.

Abstract:Using the mathematical model validated by a field test,the perennial operation of pumping & recharging well(PRW) was simulated to explore the feasibility and potential of seasonal thermal energy storage(STES) of PRW.Meanwhile,a quantitative analysis model of STES was established based on the pumping and reinjection temperature.Results show that for the existence of thermal breakthrough,the operation of previous seasons has much effect on the temperature of pumping water in the later operation seasons.This behavior verifies that the PRW apparently has the phenomenon of STES.If the accumulated loads of space heating and cooling are kept in balance,the pumping temperature and the thermal energy storage ratio will basically remain unchanged.For a PRW in Beijing with summer-winter operation mode,the STES approximately provides 73% of low-temperature heat source and 24% of heat sink.However,if the accumulated loads are in unbalance,the pumping temperature will increase or reduce much annually and even the PRW may not work.

Abstract:In order to extend the utilization of urban sewage in sewage heat pump system,based on the urban sewage which is the flow working fluid in untreated sewage heat pump system,characteristics of laminar flow and turbulent flow were studied in theoretical derivation and experimental analysis.The results show that the urban sewage has the shear-thinning characteristic in rheology,so the generalized Reynolds number can be used to determine the flow pattern.The pressure loss equations under laminar and turbulent flow conditions were deduced theoretically and verified by experiment.The research results are favourable for pump choose of untreated sewage heat pump system.

Abstract:Rearches about screening oil-degrading bacteria and their genes involed in the degrading procedure are always important.In this paper,rocatechol-2,3 pyrocatechol gene was cloned from plasmid pZL-1 by PCR method.This gene is 924 bp long and encoding apeptide of 307 amino acids.After multiple sequence alignment,it is found that the c23O gene from P.putida.ZL13 is highly similar with the c23O gene from P.fluorescens and P.putida.The pyrocatechol-2,3 pyrocatechol gene was ligated to pGEX-4T-2 and transformed in E.coli BL21.The results show that this gene can be successfully expressed.

Abstract:Research on delay in unsignalized intersection can improve the level of traffic regulations and management of intersections effectively.This article presents the process how delay happens in an unsignalized intersection and gives the investigation plan.Combined with survey results in Harbin,the relationship among traffic flow,traffic conflict,flow distribution,flow structure and the proportion of vehicles is studied.Then,the factors on the delay can be found through the change in scatter diagrams of investigation data.This research can provide the planners with an efficient analysis on the delay and provides a theoretical foundation for the calculation of delay in unsignalized intersection.

Abstract:In order to study key factors and the relationship between them during the standard informatization process,a standard informatization model was established with ISM principles by taking the standard as dominant knowledge.Meanwhile,four factor sets including transfer party,user party,informatization environment and its own factors were determined respectively.Through defining the directional relationship between each factor,the hierarchical structure diagram of factors affecting the standard informatization and the factor set in each layer were obtained.The standard informatization process is a complicated systematical engineering,which can provide a reliable and efficient path for the implementation of standard informatization according to the hierarchical relationship and impacting directions between factors.

Abstract:This paper presented a numerical model of FRP-strengthened reinforced concrete(RC) slabs under fire and conducted the coupled thermo-mechanical analysis.Based on the information about the temperature-dependent mechanical properties of concrete,reinforcing steel and FRP materials,this study developed a nonlinear finite element(FE) code to investigate the fire performance of FRP strengthened RC slabs.The FE code was verified through comparisons with existing fire tests.Based on the code,the effects of intumescent coating thickness,fire load ratio,longitudinal steel reinforcement,amount of FRP strengthening,sectional height and concrete cover on the mid-span deflection of FRP-strengthened RC slabs under fire were considered.The parametric studies show that intumescent coating thickness,fire load ratio and amount of FRP strengthening have significant effects on fire performance of strengthened slabs;sectional height and concrete cover only have moderate influences;and mid-span deflection versus longitudinal steel reinforcement is not obvious.

Abstract:In order to improve arsenate removal capacity on activated carbon,two kinds of granular activated carbon(GAC) impregnated with Fe-Mn oxide,FM-GAC-1 and FM-GAC-2 were prepared with coprecipitation method.The pH of zero point charge(pHzpc),acidity and basic function groups and the dissolved metal amount of the both modified GAC were measured.Experiments were performed to investigate arsenate adsorption isotherm,reaction kinetics and different solution conditions,such as pH and co-existing anions.The results showed that pHzpc were 6.7 and 6.0,the acidity function groups were 2 mmol·g-1 and 1.667 mmol·g-1,and the basic function groups were 1.3 mmol·g-1 and 2.06 mmol·g-1 respectively.When pH was near neutral,the dissolved metal amount was the minimum.Adsorption capacity of FM-GAC-1 and FM-GAC-2 were 28.87 mg·g-1 and 30.32 mg·g-1 at 25℃,respectively.Adsorption capacity decreased with temperature increasing.The adsorption kinetics could be predicted well by applying pseudo-second order rate equation and the chemical reaction process was the limited velocity reaction for both modified GAC.Removal was favored at lower pH.SiO32-and PO43-had negative influence on FM-GAC-1 and FM-GAC-2.

Abstract:This work investigated the trihalomathenes formation potential(THMsFP) of filtered surface water after catalytic ozonation in the presence of cerium oxide supported on alumina(CeO2/Al2O3/O3) in a continuous flow reactor.CeO2/Al2O3/O3oxidation caused a reduction of THMsFP of the filtered water by 57.0% compared with ozonation alone.It is related to the higher TOC removal and more halogen reactive sites destruction during catalytic ozonation with supported CeO2.The bromide concentration,contact time and ozone concentration were further studied during CeO2 /Al2O3 /O3oxidation.The catalytic ozonation showed a significant advantage over ozonation in controlling THMsFP of the water at conditions applied in this experiment.In fact,low ozone dosage of 0.7 mg·L-1 in the catalytic ozonation can bring about a reduction of THMsFP of the filtered water by 64.9% compared with ozonation alone.

Abstract:A prediction model of corrosion conditions is developed for buried gas steel pipelines in order to evaluate opportunely the existing states of their corrosion and prevention.A method of predicting corrosion states for the wall of buried gas pipelines by transition probability matrices is described by applying the evaluation method of corrosion damage of steel pipelines and the theory of Markov chain.Taking a buried gas pipeline for example,the corrosion states for the wall of the pipeline are predicted.It is shown that the calculated state for the latest detection of this pipe wall corrosion has a good agreement with corresponding state for its detected value and all predicted results also have an agreement with the corrosion depth calculated by the exponential function that commonly fits the max corrosion depth,which demonstrates that application of Markov chain in the prediction of corrosion is effective for buried pipelines.Thus it provides a theoretical basis for reasonable detection and maintenance period of buried gas pipelines.

Abstract:Aimed at the problems of high interference in measurement and low logging curve resolution for the logging electrode array used at present which still adopts original surface reference electrode,this paper designs a high-resolution SP logging electrode array of downhole reference electrode.The electrode array adopts array structure.It is insulative between the electrodes each other.The tool identifies the reference electrode of shaly formation automatically through singlechip when it is lifted,then it takes shale potential as the reference potential to measure SP.The field test results are satisfactory.The capacity of resisting disturbance and curve resolution are improved obviously compared with original SP logging electrode array.

Abstract:In order to accurately calculate of the force-deformation of electromagnetic launcher’s rail for the purpose of extending the rail life and improving the firing accuracy,the electromagnetic launcher’s rail was modeled as a simply supported beam on elastic foundation by moving load.The mechanical model of the beam was built by using Euler beam theory,and the analytical solution to the equation subjected to exponential magnetic pressure was derived,which can avoid the errors resulting from the uniform pressure used to replace the variable force.The influence of the elastic coefficient,the damping coefficient,the mass of rail and the load’ s velocity on the deformation of beam was numerically analyzed with MATLAB.The result shows that the elastic coefficient and the load’s velocity have obvious effect on the deformation of the beam,while the damping coefficient and the mass of rail do not.The study lays a foundation for solving the electromagnetic launcher’s rail subjected to magnetic pressure of arbitrary function and promoting the practicality of the electromagnetic guns.

Abstract:In order to judge the bearing safety of homogeneous ground that the heavy forcing plates acted on,static and dynamic outfield tests were carried out.According the static plate loading method,the outfield test that bearing plates simulating the static procedure of heavy forcing plates was performed.By the similarity criterion π theorem,the pneumatic impact test of reduced proportional plate simulating the dynamic procedure of forcing plate was completed.Based on the outfield tests,the paper studied the S-t curves that express the variety of settlement with time,the P-S/D curves that express the soil settlement correlative relation among bearing plates with different sizes under the corresponding load,the P-S curves under static and dynamic loads as well as the contrast between them.To the homogeneous soil ground in outfield tests,S-t curves indicate that the static load method is reasonable,and P-S/D curves appear a linear proportional relation in the limit load range.The settlement under dynamic load is much less than that under static load.The deformation stiffness under dynamic load is higher than that under static load.The settlement caused by instant dynamic impact can be ignored.