敞口管型桩压入对既有受荷桩基承载性状影响

王磊,俞峰,潘静杰

Influence of jacking open-ended tubular piles on bearing behavior of existing in-service piles

Lei WANG,Feng YU,Jing-jie PAN

表 2 新增桩长为25 m时不同桩间距下在役桩极限侧摩阻力对比

Tab.2 Comparison of ultimate lateral friction resistance of in-service piles under different pile spacings with newly added pile length of 25 m

d/m Qsu /kN S1/% S2/% 简单应力法 圆孔扩张法 有限元法 补桩前 1041.2 943.1 981.4 6.1 −3.9 3D 1305.4 1201.1 1233.8 5.8 −2.6 4D 1279.4 1183.5 1183.5 8.1 −5.0 5D 1129.3 984.3 1042.3 8.3 −5.5 6D 1074.5 934.7 991.2 8.4 −5.7