电力沟槽拉森钢板桩单锚支护设计

Shoring Design of Electrical Conduit Trench with Single Anchor Larssen Steel Sheet Pile

分析了电力沟槽钢板桩支护的特点、适用条件与锚固形式。指出了单锚式钢板桩支护设计的流程,给出了计算土压力系数、主动土压力、附加荷载的起始影响深度、板桩上土压力为零点的位置、等值梁支点反力、钢板桩理论入土深度、钢板桩实际桩长及钢板桩上最大弯矩的算法及拉森钢板选型时的截面应力验算公式。最后结合工程实例实现了编程计算与验证。

The characteristics,applicable conditions and anchoring forms of steel sheet pile used for the supporting of electrical conduit trench are analyzed.Some key parameters,such as coefficient of earth pressure,active earth pressure,starting influence depth of additional load,zero point position of earth pressure in sheet pile,forces on equivalent beams,theoretical embedded depth of steel pile,actual pile length and the maximum bending moment of steel sheet pile,are derived.And the verification formula of section stress is also provided.Finally,a relevant project is analyzed and calculated based on a computer program.