铁道标准设计2018，Vol.62Issue(6)：83-88,6.DOI:10.13238/j.issn.1004-2954.201706200003
高速铁路岩溶地区桩基后压浆试验研究
Experimental Study on Post Grouting of Pile Foundation of High-speed Railway in Karst Area
摘要
Abstract
The 189# and 190# piers of Shunyi major bridge on Beijing-Shenyang high-speed railway are located in the karst area.The original designed piles need to pass through the karst stratum and it's difficult to make it,and the progress and cost plan are difficult to guarantee.The bearing capacity is improved by post grouting technique in pile tip and pile side.In order to obtain the parameters and effects of post grouting,static loading test of pile foundation is carried out in situ.In this paper,the calculation of bearing capacity of bored piles before and after grouting is conducted following Technical Code for Building Pile Foundations,in which pile top displacement,lateral friction of pile and pile tip resistance under different loading conditions are compared and analyzed.The results show that the post grouting process can improve effectively the bearing capacity of pile,reduce the pile top settlement,increase the proportion of lateral friction resistance and finally significantly improve the lateral friction resistance of sandy soil in the range of 10 m below the pile top.关键词
岩溶发育区/桩基础/压浆/静载试验/高速铁路Key words
Karst development area/Pile foundation/Grouting/Static load test/High-speed railway分类
建筑与水利引用本文复制引用
白丁伟,马建林,李兴国,孙卫星..高速铁路岩溶地区桩基后压浆试验研究[J].铁道标准设计,2018,62(6):83-88,6.基金项目
国家重点研发计划(2016YFC0802203-1) （2016YFC0802203-1）
