刚性桩复合地基沉降计算方法的探讨及应用

对规范建议的刚性桩复合地基沉降计算方法进行了讨论,指出该法在应力场假定、加固区复合模量的取法上还有待完善。之后,根据试验结果并结合理论分析,提出沉降计算的一种近似方法——双层应力法。该方法在对复合地基的应力分布进行分层假定的基础上,利用《建筑地基基础设计规范》中的分层总和法计算沉降。最后,利用实际工程对双层应力法进行了验证,并将该法在24项工程中加以应用。

AN SIMPLIFIED METHOD FOR SETTLEMENT OF RIGID-PILE COMPOSITE FOUNDATION

A method for settlement of composite foundation with rigid-pile is proposed in the paper. It is named two-layer stress method. It is based on the experimental results and theoretical study of the current code. It is found that the stress distribution at the top of the soil among the piles and the substratum are governed by the dimensionless regressive formula. The settlements then can be evaluated by the layer-wise summation method. The results of the proposed method are compared with that of the field measured. It is shown that the comparison is in good agreement. The method is now applied to 24 cases of engineering project.