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 3 新增桩与在役桩间距为3D时不同桩长下在役桩极限侧摩阻力对比
Tab.3 Comparison of ultimate side friction resistance of in-service piles under different pile lengths with distance between newly added piles and in-service piles in 3D
L/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
15 1085.4 981.7 1001.3 8.4 2.0
20 1190.2 1042.2 1097.5 8.5 5.0
25 1305.4 1201.1 1233.8 5.8 2.6