刚性桩复合地基沉降计算方法

 基于原状土切线模量法，对刚性桩复合地基的沉降计算提出一种新的沉降计算方法。该方法用切线模量法分别计算基础下土体和刚性桩的荷载–沉降过程曲线。依据共同作用时桩和桩间土的沉降相等的条件，对土体和刚性桩的荷载–沉降过程曲线进行复合得到刚性桩复合地基的荷载–沉降过程曲线，则刚性桩复合地基的沉降可以根据其荷载–沉降曲线得到。对于有复合地基的载荷试验的情况，提出直接利用其试验曲线建立复合地基的双曲线切线模量方程，利用该方程计算实际基础的沉降。通过工程实例表明，新的沉降计算方法具有较好的精度。

METHOD FOR CALCULATING SETTLEMENT OF RIGID-PILE COMPOSITE FOUNDATION

Based on undisturbed soil tangent modulus method,a new practical settlement calculation method for rigid- pile composite foundation is proposed. The load-settlement curve of soil under foundation and the load-settlement curve of rigid-pile are obtained by the undisturbed soil tangent modulus method. Considering that the settlement of pile and soil is equal when they support the foundation jointly,the load-settlement curve of the rigid-pile composite foundation is obtained based on the load-settlement curve of soil and the load-settlement curve of rigid-pile,then the settlement of rigid-pile composite foundation can be gotten from the load-settlement curve. For the composite foundation with loading test,the settlement of rigid-pile composite foundation can be calculated by the hyperbola tangent modulus equation which is put forward by directly using the test curve. The practical examples prove that the new method has more precision for settlement calculation.