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 1 各土层物理力学参数

Tab.1 Physical and mechanical parameters of soils

层号 名称 h/m $ \gamma $/(kN·m−3) $ k $/(m·d−1) $ c $/kPa $ \varphi $/(°) $ E_{50}^{{\text{ref}}} $/MPa $E_{{\rm{oed}}}^{{\rm{ref}}}$/MPa $ E_{{\text{ur}}}^{{\text{ref}}} $/MPa $ \lambda $ 1 素填土 5.1 17.7 5.3×10−4 9.0 12.0 20.0 20.0 60.0 0.35 2 淤泥质粉质黏土 11.5 17.9 2.2×10−4 11.2 19.5 17.5 17.5 87.5 0.35 3 淤泥质黏土 6.0 17.1 1.3×10−4 19.6 7.0 15.0 42.2 75.0 0.35 4 黏土 5.0 19.0 3.0×10−4 37.0 14.5 36.5 35.0 109.5 0.35 5 粉质黏土 5.0 18.9 3.9×10−4 35.0 16.0 35.0 35.0 105.0 0.35 6 黏土 5.4 18.0 3.0×10−4 52.5 9.0 22.5 38.5 90.0 0.35 7 强风化安山岩 12.0 22.0 7.8×10−2 450.0 53.0 75.0 74.4 225.0 0.25