抗滑桩与周围岩土体间相互作用力的分布规律

Distribution Law of Forces between the Anti-sliding Pile and the Surrounding Soil Mass

基于岩土工程有限单元法研究了抗滑桩与周围岩土体间相互作用力的分布规律,研究结果表明,抗滑桩与围岩间相互作用力呈非线性分布。侧向膨胀力是由抗滑桩抑制围岩在重力作用下的侧向应变而产生,弹性模量对侧向膨胀力的非线性分布有重要影响。将抗滑桩锚固段某侧压应力对锚固段顶点的弯矩等效变成均匀分布力产生的弯矩,此均匀分布力为等效锚固力。等效锚固力与均布推力呈正比,比例系数随锚固比增大而减小。

Based on the finite element method of geotechnical engineering, non-linear distribution of forces between anti-sliding pile and surrounding soil mass was presented. Lateral swelling force that is generated when anti-sliding pile inhibits lateral strain of surrounding soil mass caused by gravity. Young’s modulus plays an important role in non-linear distribution of lateral swelling force. Against the climax of anchoring part, the flexural torque of objectively existing compression stresses of anchoring part can be regarded as that of uniformly distributing force that is defined as equivalently anchoring force which is direct proportion to uniformly distributing push. Proportion factor between equivalent anchoring force and uniformly distributing push is direct ratio, proportion factor decreases with the growth of anchoring ratio.