西安地铁四号线五路口站深基坑围护结构施工技术  

Construction technology of closure structure of deep foundation pit for Wulukou station of Xi'an metro line 4

作　　者：贠永峰[1] 吴禄源 袁超[1] 王磊[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《铁道建筑》2015年第5期78-82,共5页Railway Engineering

基　　金：国家自然科学基金青年基金(51404193)

摘　　要：西安地铁四号线五路口站处于工程地质条件较复杂的地段,采用半幅铺盖明挖顺作法施工。其围护结构利用钻孔灌注桩加水平旋喷桩止水,在桩顶部设置冠梁和连系梁。本文阐述了该围护结构的特点、主要施工工艺、施工难点及解决措施、围护结构水平位移和沉降的监测方案。结果显示,桩顶累计水平位移6.7 mm,桩体累计沉降6.6 mm,满足基坑稳定和安全的要求。Wu Lukou station of Xi＇an 4# subway locates in the complex engineering geological area and the half blanket and open excavation method should be adopted in construction. The retaining structure of foundation is the occlusion of bored pile and horizontal jet grouting pile and setting top beam and tie beam at the top of pile. This paper discussed the characteristics, the main construction technology, construction difficulty and solving measures for such retaining structure and the monitoring plan of retaining structure horizontal displacement and settlement. The results showed that the cumulative horizontal displacement of pile top is 6.7 mm and the cumulative pile settlement is 6.6 mm,which meets the stability and safety requirements of foundation pit.

关 键 词：围护结构 钻孔灌注桩 旋喷桩 监测 

分 类 号：TU473.14[建筑科学—结构工程]