复合土钉支护的现场测试研究  

FIELD TESTING STUDY ON COMPOSITE SOIL NAILING

作　　者：段建立[1] 谭跃虎[1] 樊有维[2] 陆峰[2] 

机构地区：[1]解放军理工大学人防工程系,南京210007 [2]南京市测绘勘察研究院,南京210005

出　　处：《岩石力学与工程学报》2004年第12期2128-2132,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：建设部科研攻关项目(02-2-1.9)资助课题。

摘　　要：结合南京市玄武湖隧道基坑支护工程,介绍了自钻式土钉与深层搅拌桩相结合复合土钉支护技术的设计、施工方法。然后通过对复合土钉支护的土钉受力、深层水平位移等的现场测试和分析,比较全面地研究了复合土钉支护在施工及使用阶段的工作性能。The support system using self-drilling soil nail with sealing wall is described and applied to the foundation pit of Xuanwu Lake tunnel project. A field investigation with extensive instrumentation and data collection is carried out to monitor performance and safety of this type of composite soil nailing. From the field tests, it is found that (1) the largest horizontal deflection is at the bottom of the soil nailed structure, (2) the nail force increases rapidly during construction and remains as an almost constant thereafter, and (3) at first the nail head force decreases slightly, but then increases during construction. The behaviors of composite soil nailing during construction and in service are further investigated based on the measurements.

关 键 词：土力学 基坑支护 复合土钉支护 自钻式土钉 现场测试 玄武湖隧道工程 

分 类 号：TU472[建筑科学—结构工程] TU43[建筑科学—土工工程]