某隧道工程超深基坑支护技术  

Protecting Technique for Super-deep Foundation Excavation of Tunnel Engineering

作　　者：李红霞[1] 王永伟[1] 郭院成[2] 

机构地区：[1]黄河科技学院,河南郑州450063 [2]郑州大学,河南郑州450000

出　　处：《建筑科学》2013年第9期112-118,共7页Building Science

基　　金：地基加固的复合注浆技术研究河南省教育厅科技攻关(2011C560005)

摘　　要：郑州市某隧道工程地处黄河冲击平原,设计标段基坑开挖深度为21m,工程场地地质条件及地下水情况复杂。在基坑支护结构设计时,充分利用该工程场地地质特点,以最大允许放坡作为前提,分别采用土钉墙支护+锚杆、水泥土墙+锚杆、排桩+锚杆和花管注浆的复合支护型式进行方案比较。选定的放坡+花管注浆方案,经过施工监测,指标均在设计控制标准之内,具有较好的基坑支护效果和经济效益。本文详细介绍了基坑支护结构的设计思路,以供类似工程借鉴。The tunnel engineering is located in the Yellow River alluvial plain. The foundation pit excavation depth is 21m, and the geological condition and groundwater are complicated. Considering the geological condition characteristic and the maximum allowable slope, the composite support types of soil nailing wall and bolt, cement wall and bolt, sheet pile and bolt, and tube grouting scheme are compared. The slope and flower tube grouting scheme is selected. Through the construction monitoring, the indexes are within the control standards of design, and the foundation pit supporting effect and economic benefits are satisfied. It will provide the reference for similar projects.

关 键 词：隧道工程 超深基坑 花管注浆 复合支护 监测 

分 类 号：TU753.8[建筑科学—建筑技术科学]