Design And Numerical Simulation Analysis Of Deep Foundation Pit Supporting Structure

Based on the actual deep foundation pit engineering in Guangzhou,this paper has carried out the design of pile and anchor support and dynamic monitoring and numerical simulation of the construction.The main contents are as follows:(1)According to the actual situation,the type of supporting structure of the foundation pit is selected reasonably.The displacement,bending moment and shear force of the supporting structure of the foundation pit are calculated by using the deep foundation pit software.Check its rationality;(2)The GEO5 software is used to simulate the construction process of the foundation pit.According to the simulation results,the displacement,bending moment,shear force and the settlement of the foundation pit are obtained under the condition of the construction condition.index;(3)The horizontal displacement of the supporting pile,the horizontal displacement of the pile top,the settlement of the surface of the foundation pit and the actual value of the internal force are obtained by field monitoring.The results are compared with the software calculation results and GEO5 software simulation results.The rationality of the support design scheme and the accuracy of the modeling;(4)The influence of the arrangement of the supporting structure on the pit shape of the foundation pit is studied by changing the spacing of the row piles.The GEO5 software is used to simulate the deformation degree of the foundation pit under different pile spacing,and then the foundation pit support structure is optimized.Through the simulation analysis of a deep foundation pit project in Guangzhou,it is concluded that the type of supporting structure is satisfied to meet the excavation requirements of the foundation pit,not only the reasonable validity of the rational support design is fully verified,Design and construction.The results show that the combination of the two has a strong practical value in deep foundation pit support.