铁道标准设计2018，Vol.62Issue(1)：113-118,6.DOI:10.13238/j.issn.1004-2954.201703150002
盖挖地铁车站试验桩单桩承载力试验分析
Experimental Study on Bearing Capacity Test of Single Pile in Subway Station Constructed by Covered Top-down Excavation
摘要
Abstract
The designed pile top in the cover excavation subway station is usually lower than the natural ground.When the foundation pit excavation is restricted by conditions,the bearing capacity of the single pile must be tested on the natural ground.The invalid soil layer above the designed top may generate greater friction resistance to the test pile,which leads to inaccurate test data.This paper studies the problem of invalid soil friction in the test of bearing capacity of single pile,puts forward the method for making test pile combined with the double steel casing,and analyzes the bearing capacity of the single pile.The test results show that the bearing capacity of the single pile meets the design requirement and the double steel casing can better solve the problem of the pile side friction resistance of the invalid soil layer,which ensures the accuracy and reliability of the test data.关键词
单桩极限承载力/单桩承载力特征值/试验桩/单桩承载力试验/桩侧摩阻力Key words
Ultimate bearing capacity of the single pile/Characteristic value of single pile bearing capacity/Test pile/Test of single pile bearing capacity/Side friction resistance of pile分类
建筑与水利引用本文复制引用
杜建华,于全胜,沈红云..盖挖地铁车站试验桩单桩承载力试验分析[J].铁道标准设计,2018,62(1):113-118,6.基金项目
河北省重点研发计划项目(16275429) （16275429）
中铁隧道集团有限公司科技创新计划(2013-16) （2013-16）
