桩基承载力模拟试验中相似性问题  

Similarity in the Simulation Test for Bearing Capacity of Pile Foundation

作　　者：冷曦晨[1] 佴磊[2] 亓宾[2] 

机构地区：[1]中国地质大学工程技术学院,北京100083 [2]吉林大学建设工程学院,吉林长春130026

出　　处：《吉林大学学报（地球科学版）》2005年第4期491-495,共5页Journal of Jilin University：Earth Science Edition

基　　金：吉林省交通厅科研项目(2003-1-13)

摘　　要：通过对桩基承载力模拟试验中相似性问题的研究,重点探讨了试验与工程桩所处环境的相似性,剪切摩擦试验与工程桩桩侧摩阻力的相似性以及三轴试验与桩端承载力的相似性等三个主要的相似问题。研究表明对于模拟试验中桩侧摩阻力的试验,应采用原状样,并保持应力与工程应力状态一致。对于端承力则应采用原状样,但将围压按几何相似常数缩小,并将端承力试验结果按该相似常数扩大以作为实际工程桩的端承力。The similarity problem, existing in the simulation tests for bearing capacity of pile foundation, is studied. The emphasis is on the following three major aspects such as the similarity of the environments between test and engineering pile, the similarity between shearing friction test and the side friction force of engineering pile and the similarity between the triaxial test and end-bearing capacity of pile. The study shows that in the simulation test the samples should be undisturbed and the state of the stress in test should be consistent to that of the engineering for the test of pile side friction in the simulation test. For end-bearing capacity of pile, the samples should be undisturbed, but the confining pressure of samples is shrank according to geometry similarity constant, so as to obtain the practical endbearing capacity of pile by multiplying the test results.

关 键 词：相似性 桩基承栽力 模拟试验 

分 类 号：TU473.11[建筑科学—结构工程]