基于泥浆平衡地压的桩孔稳定性分析及支护建议
熊国军, 王建华, 陈锦剑

Stability Analysis and Support Suggestions of Pile Hole Based on Mud Pressure Balance Earth Pressure
XIONG Guojun, WANG Jianhua, CHEN Jinjian
图3 主动土压力在开挖深度范围为负的两个实例
Fig.3 Two examples of active earth pressures being negative in the depth range of excavation