摘要
根据应力扩散理论,将锚拉桩后的土体分为应力扩散影响区及非应力影响区,进而将预应力锚拉桩的土压力传递方式分为两部分:楔体内的土压力直接传递到锚头,与锚头间形成自平衡体系;楔体外的土压力通过桩身结构再传递到锚头。利用静力平衡方程,导出作用在桩上的土应力强度,分析影响桩身土压力分布规律的相关因素,并结合一工程案例的测试结果,与理论分析得到的成果进行对比分析,验证提出的土压力计算模式的正确性。
According to the stress diffusion theory,the soil behind the anchor pile structure was divided into the stress diffusion affected area and non stress affected area.Then soil pressure transmission mode of the pre-stressed anchor pile was divided into two parts: soil pressure produced by wedge was directly transferred to the anchor head,the soil and the anchor head formed a self-balance system;other soil pressure through the anchor pile structure was passed to the anchor head.Using the static equilibrium equations,the soil pressure intensity exerted on pile was deduced and related influencing factors of its distribution were put forward.The theoretical analysis results were compared with the results of an engineering case test,and the correctness of the soil pressure calculation mode was demonstrated.
出处
《建筑结构》
CSCD
北大核心
2011年第10期102-104,共3页
Building Structure
关键词
预应力锚拉桩
土压力计算模式
土楔体
扩散角
自平衡体系
pre-stressed anchor pile
soil pressure calculation mode
soil wedge
diffusion angle
self-balance system