Research On The Impact Of Large-scale Heap Loading On The Surrounding Environment And Its Control Measure

In recent years,there has been a significant increase in loading activities at port terminals,logistics warehouses,and industrial plants.These activities can have various long-term effects on the surrounding infrastructure such as buildings,roads,and pipelines.Therefore,it is crucial to investigate the influences of large-area loading on the surrounding environment,and to implement appropriate control measures.In this thesis,taking a large-area stacking project as an example,the influence of large-area stacking on the surrounding environment is studied by analyzing the monitoring data of surface settlement,side pile settlement,and horizontal displacement in the stacking area.The numerical calculation model of B stacking area is established by using finite element software,and the influence range of large area stacking on the surrou nding environment is studied.This thesis puts forward the engineering measures of setting foundation isolation groove to control the influence of surcharge on the surrounding environment,and that analyzes the deformation control mechanism,and systematically studies the control effect through model tests and numerical simulation.Finally,the influence of the parameters of the isolation groove on the control effect is analyzed.The main work and conclusions are as follows :(1)By comparing and analyzing the development trend and size of the settlement of the side piles in the three stacking areas and the surface settlement in the stacking area,and analyzing the maximum horizontal displacement value of the side piles in each area,the influence of large-scale stacking on the surrounding environment is obtained.The finite element model of the loading project in area B is established.The rationality of the model is verified by comparing the measured data and the simulation results in the loading area.At t he same time,the distribution of surface settlement,horizontal displacement,and excess pore water pressure at different distances outside the loading area is analyzed.It is concluded that the influence degree and influence range of large-area loading on the surrounding environment is large.(2)The calculation method of horizontal displacement of foundation under surcharge is introduced,and the influence of surcharge size,surcharge width,surcharge distance,and soil modulus on soil lateral displacement is analyzed by numerical calculation.The deformation control mechanism of the isolation groove is analyzed from the perspective of force and deformation.The calculation method of the horizontal additional stress on the side of the groove and the foundation reaction force on the backload side is proposed,and the deformation of the groove wall is calculated according to the simplified calculation model of the groove wall.The pile body internal force and deformation value under the adjacent heap load are calculated by the differential equation of the pile deflection.The calculation results are in good agreement with the simulation results,which can better reflect the deflection law of the pile under the heap load.(3)Two sets of model tests with or without isolation slots were designed.The test design,measuring point arrangement,material selection,test process,and data processing method of the model test were introduced in detail.The internal force deformation law of adjacent pile foundations underground surcharge load without isolation groove was analyzed.After implementing the isolation slots,the deformation of the isolation slots under the action of the surcharge load was studied.By comparing the results of the two groups of tests,the control effect of the isolation groove on the bending moment and horizontal displacement of the adjacent pile foundation is analyzed.It is concluded that the isolation groove can significantly reduce the bending moment and horizontal displacement of the adjacent pile foundation.(4)The finite element software is used to establish a numerical model to further explore the control effect of the isolation groove on the surrounding deformation.The rationality of the model is verified by comparing the simulation results with the model test results.According to the model calculation results,the isolation trench control effect on the bending moment,horizontal displacement,pile top settlement,and soil displacement behind the trenc h are analyzed,and the isolation trench has a good control effect on each monitoring content.The effects of the parameters of isolation groove,such as depth,length,and width,the stiffness of the isolation groove wall,and the support stiffness on the control effect are studied,and the recommended values of various parameters are given.