高级切线模量法及其在地基沉降计算中的应用

Advanced tangent modulus method and its application to calculation of foundation settlement

切线模量法方法简单、参数少,易于工程应用,研究表明在计算常规尺寸的基础时具有较好的精度,而对于筏板这样的大尺寸基础时,当计算深度较深时,存在计算沉降偏大的问题。为此提出了考虑初始切线模量沿深度增大的高级切线模量法,通过与实际工程案例和小应变有限元数值计算方法结果比较,高级切线模量法能更符合实际,进一步发展完善了切线模量法。

The tangent modulus method proposed by YANG Guang-hua is simple, with few parameters and easy for engineering application. The researches have shown that it has better accuracy when calculating the foundations with conventional dimensions, but for the large-sized foundations such as rafts, the calculated settlement is too large. For this reason,an advanced tangent modulus method considering the increase of the initial tangent modulus extension depth is proposed. The comparison with the actual engineering case and the calculated results by the finite element method of the small-strain hardening soil model shows that the advanced tangent modulus method can be more realistic. This further develops and improves the tangent modulus method.