Study On Deep Foundation Pit Supporting And Dewatering Technology Of An Island Soft Shoal

Under the situation of modern construction integration,fine management,green building,production industrialization and market standardization,two points of stability and health are the main key to the development of architecture.With the progress of the times and the innovation of technology,the design and safety of the foundation pit engineering is the key point of the geotechnical engineering,and it is the difficult point,and the site regionality is the prerequisite to be considered.Depending on the regional characteristics of the building site,it is both an opportunity and a challenge to establish appropriate,reasonable and practical design and construction schemes and the diversification of the form of enclosure for the contemporary foundation pit.The project is located in the big pit island south of Brunei Muara,Brunei Muara port Bay,west.In this paper,the method of combining the theoretical calculation,the measured data feedback and the finite element software simulation is carried out on the background of the rainwater monitoring accident pool project.The feasibility of the construction and the prevention and treatment of the important problems are obtained by combining the supporting form of the foundation pit and the monitoring data in the field.The main research work and results are as follows:1.Consult a large number of documents and norms about the foundation pit in the soft soil area,and make a summary to the reasonable design of the rainwater monitoring pool,which is located in the east of Brunei grand Mora Island,and then analyze its deformation law.2.Combined with the detailed geological exploration report,considering the surrounding environment and other factors,in line with the principle of "safe,reliable,economical,feasible,feasible and convenient for construction",the supporting form is set up with slope and steel sheet pile support,and the structure and cross section of the supporting system are checked and calculated with the correct software to meet the requirements.3.Combined with the foundation pit support form and the field environmental factors,aiming at the groundwater in the Quaternary gap dive,it establishes the clear drainage of the pipe well precipitation and the water reduction and drainage scheme of the steel plate pile retaining water around it.Through calculation,the number of pipe wells in different regions and the water inflow of the foundation pit are calculated.4.Combined with the design of foundation pit supporting structure,a feasible monitoring plan for foundation pit is made,and the monitoring data of foundation pit are collected and monitored during the whole project.At the same time,using the finite element software MIDAS GTS NX to simulate the precipitation,excavation and support construction process by selecting parameters,modeling and dividing the grid,defining the construction stage and solving process,and analyzing the deformation law,and comparing with the actual monitoring data,the conclusion is consistent with the conclusion.