摘要
根据侧移土中桩的Ｐｏｕｌｏｓ理论编制电算程序，用以求得澳门南方大厦基坑开挖中软土流动形成的曲桩侧向位移与弯矩分布。将最大计算弯矩与分析现场曲桩载荷试验以及实验室测定的桩段破坏弯矩所得的极限弯矩相比较，从而作出曲桩折断判据。曲桩竖向承载力分析程序是按处于弹性介质中的曲梁微分方程（以差分形式表示）编制的；介质中的水平力引起某点的水平位移由Ｍｉｎｄｌｉｎ方程给出。以荷载传递法调配得到出事桩基中各类基桩的荷载－沉降曲线后，根据非线性的群桩整体分析选定桩基加固的补救性措施。
A computer program based on Poulos 's theory of piles in soil undergoinglateral movement has been developed to obtain the lateral displacement and bendingmoment distributions along bent piles formed by soft-soil flow in the pit excavationof Nalnfong Bldg in Macao. Comparing the calculated maximum bending moment withthe ultimate moment obtained through interpreting the load test of a bent pile in situas well as measuring the rupture moments in pile sections tested in laboratory, we derive a rupture criterion for the bent piles. In developing a program for vertical load capacity analysis of bent piles, use is made of the differential equation given in infinite-difference form for bending of a curved beam in a elastic medium, within whichthe horizontal displacement of a point caused by horizontal pointed-load is given byMindlin equation. The load-settlement curves of the foundation piles are predicted byload-transfer method. And then, remedial measures for the foundation strengthening areadopted based on a nonlinear general analysis of pile-group.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
1995年第3期98-105,共8页
Journal of South China University of Technology(Natural Science Edition)
关键词
软土
承载能力
基坑
桩基
曲桩
高层建筑
s: piles, bearing capacity, soft soils, flow, excavation, media
