Pile-anchor structure is widely used in foundation pit support,but the design and calculation are always subject to experience,which has certain blindness and uncertainty.The influence of design parameters of pile-anchor structure on mechanical properties of foundation pit under the action of reserved soil was analyzed by numerical simulation.The results show that the maximum horizontal displacement of foundation pit supporting pile occurs at the top of pile,while the displacement of pile bottom is very small.The surface settlement around the foundation pit is distributed in groove shape,and the maximum settlement is about 5 m away from the edge of the foundation pit.The bending moment distribution curve has two peak points along the pile body,and the peak points are about 3 m and 10 m away from the pile top.When the anchoring angle of anchor cable is 15°,the horizontal displacement and bending moment of supporting pile and the surface settlement around the foundation pit are relatively small.The farther the anchorage point is from the pile top,the greater the horizontal displacement of foundation pit supporting pile and the surrounding surface settlement.When the prestress is greater than 200 kN,the horizontal displacement and bending moment of piles and surrounding surface settlement basically do not decrease.
关键词
基坑/桩锚结构/预留土/力学性状/数值模拟
Key words
foundation pit/pile-anchor structure/reserved soil/mechanical property/numerical simulation
维普
万方数据