岩溶区桩基注浆加固效果的影响因素分析  

Affected factors analysis of pile foundation grouting reinforcing effect in karst region

作　　者：张文学[1] 刘海陆[1] 谢全懿 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《铁道建筑》2014年第7期28-30,共3页Railway Engineering

基　　金：国家自然科学基金资助项目(51278015)

摘　　要：目前关于岩溶区桩基沉降计算的研究相对较少,还没有成熟的计算理论及计算公式,这给岩溶区铁路客运专线桥梁基础设计提出了难题。本文以某高铁为依托工程,建立岩溶区桩基有限元模型,模拟了不同注浆方案对控制岩溶区桩基沉降的效果,系统分析了注浆土体变形模量和桩尖土层厚度对不同注浆加固效果的影响规律,可为同类工程提供参考。At present,very few studies have been conducted towards a systematic calculation system of the pile settlement in karst regions,which poses severe challenges to the foundation design for passenger-dedicated railway bridge. The paper introduces a high speed line that operates in China as a real-time example and establishes the finite-element model for the pile and foundation at the karst regions. On this basis,the paper manages to simulate the settlement effects that different grouting approaches deliver, therefore concludes the relation among modulus of deformation,soil layer thickness at the pile toe and the reinforcement effect. Hopefully,the results achieved are of reference to future projects of a similar kind.

关 键 词：桩基 溶洞 岩溶区 沉降 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]