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针对等值梁法在基坑支护结构设计的基本理论与基本假定进行了详细的介绍。利用主、被动土压力系数之间的相关性,对其计算形式进行了转换,提出了一条土压力系数的简化公式计算入土深度,并通过某工程实际算例验证了简化公式的适用性。强调了可以通过拟合函数的单调性并结合土体的性质和状态修正板桩结构的嵌固深度,提供了科学分析的依据。采用不同方法对比分析土压力零点位置的差异对支护结构的影响,可以根据适用条件针对性的确定计算方式。
Aiming at the equivalent beam method, the basic theory and basic assumptions of foundation pit supporting structure design are introduced in detail. Using the correlation between the main and passive earth pressure coefficients, the calculation form is converted. A simplified formula of earth pressure coefficient is proposed to calculate the depth of soil penetration. The applicability of the simplified formula is verified by an actual example of an engineering project. It emphasizes that the basis of scientific analysis can be provided by modifying the monotonicity of the fitting function and combining with the nature and state of the soil body to correct the embedding depth of sheet pile structure. Using different methods to compare and analyze the influence of the difference of zero position of earth pressure on the supporting structure, the calculation method can be determined according to the applicable conditions.