深大基坑两级复合土钉支护现场测试研究

›› 2008, Vol. 29 ›› Issue (10): 2823-2828.

深大基坑两级复合土钉支护现场测试研究

王贵和，贾苍琴，季荣生，吕建国，唐红霞

中国地质大学工程技术学院，北京 100083

收稿日期:2007-04-10 出版日期:2008-10-10 发布日期:2013-08-03
作者简介:王贵和，男，1966年生，博士，教授，主要从事地质工程方面的教学与科研工作

Field testing study of deep and large foundation pit with two-step composite soil nailing

WANG Gui-he, JIA Cang-qin, JI Rong-sheng, LÜ Jian-guo, TANG Hong-xia

School of Engineering and Technology, China University of Geosciences, Beijing 100083, China

Received:2007-04-10 Online:2008-10-10 Published:2013-08-03

摘要/Abstract

摘要： 结合北京国美商都深大基坑支护工程实践，介绍了砂卵石层中花管式土钉、普通土钉与预应力锚杆相结合的两级复合土钉支护技术的设计与施工方法。通过现场对土钉拉力、基坑位移和锚杆应力的测试与分析，较全面地研究了在砂卵石层中基坑两级复合土钉支护的工作性能。研究结果表明：坡面设置一定宽度的退台会引起“退台效应”，进而导致土钉墙受力特征的改变；复合土钉支护中设置预应力锚杆可以很好地控制基坑水平变形，但受土钉墙面层刚度限制和锚杆承压板厚度偏小等因素影响，锚杆锁定后预应力损失很大；土钉的最大拉力作用点连线向上向下延伸后，与边坡的最危险滑动面接近

关键词: 深大基坑, 复合土钉支护, 现场测试, 退台效应

Abstract: The design principle and construction method from the case of Gome Shoppingcity excavation project on two-step composite soil nailing combined with spline-pipe soil nail, general soil nail and prestressed anchor are presented. A field investigation, including tensile forces of soil nail, excavation displacements and anchor stresses, and comprehensive analyses of the results are addressed. The characteristics of two-step composite soil nailing of excavation in sand and gravel layer are further investigated. Owning to the backslide effects, the mechanisms of soil nailing are changed. It also suggests that the horizontal deformation of excavation is controlled well by prestressed anchor of composite soil nailing support system. And the prestress loss of anchor after locking is obvious because of some factors, such as the limit of surface stiffness of soil-nailing wall and the small thickness of bearing plate. The curve which is formed by positions of maximum tensile forces of soil nails may be the most dangerous sliding curve.

Key words: deep and large foundation pit, composite soil nailing, field test, backslide effect

中图分类号:

TU 472

王贵和，贾苍琴，季荣生，吕建国，唐红霞. 深大基坑两级复合土钉支护现场测试研究[J]. , 2008, 29(10): 2823-2828.

WANG Gui-he, JIA Cang-qin, JI Rong-sheng, Lü Jian-guo, TANG Hong-xia. Field testing study of deep and large foundation pit with two-step composite soil nailing[J]. , 2008, 29(10): 2823-2828.

参考文献

相关文章 15

[1]	胡勇，李云安，李波，李从安，肖捷夫,. 承压水位变动下深大基坑空间效应离心试验与数值模拟[J]. , 2018, 39(6): 1999-2007.
[2]	谢涛，罗强，周成，张良，蒋良潍, . 高速铁路小变形下陡坡地基路肩桩板墙力学响应[J]. , 2018, 39(1): 45-52.
[3]	蒋建清，杨果林，. 格宾网加筋红层软岩土石混填路堤力学行为的现场测试与数值模拟[J]. , 2016, 37(1): 156-165.
[4]	邓宗伟，彭文春，高乾丰，董辉，朱志祥,. 风力机扩展基础基底压力测试与平面度分析[J]. , 2015, 36(9): 2659-2664.
[5]	赖金星，樊浩博，来弘鹏，谢永利，胡昭，邱军领，曹宁全,. 软弱黄土隧道变形规律现场测试与分析[J]. , 2015, 36(7): 2003-2012.
[6]	赖金星，牛方园，樊浩博，邱军领，王开运,. 浅埋黄土隧道三层支护结构力学特性现场测试[J]. , 2015, 36(6): 1769-1775.
[7]	丁伯阳，徐庭，潘晓东，李通坤 . 格林函数表象积分对打桩排水的计算[J]. , 2014, 35(7): 1935-1942.
[8]	田建勃，陈凯，韩晓雷，史庆轩，徐生玉，郝旭,. 高填方输煤暗道周边土压力试验研究[J]. , 2014, 35(6): 1679-1686.
[9]	龚剑，王旭军，赵锡宏 . 深大基坑首层盆式开挖对基坑变形影响分析[J]. , 2013, 34(2): 439-448.
[10]	屈畅姿，王永和，魏丽敏，郭志广 . 武广高速铁路路基振动现场测试与分析[J]. , 2012, 33(5): 1451-1456.
[11]	陈保国，孙金山，张磊. 上埋式钢筋混凝土拱涵受力特性及地基处理研究[J]. , 2011, 32(5): 1500-1506.
[12]	陈保国，骆瑞萍，孙金山. 上埋式盖板涵受力特性及影响因素研究[J]. , 2011, 32(1): 199-206.
[13]	贾金青，王海涛，涂兵雄，孟刚. 管棚力学行为的解析分析与现场测试[J]. , 2010, 31(6): 1858-1864.
[14]	聂如松，冷伍明，杨奇，岳健，杨小礼. 路基填土对桥台桩基影响的试验与数值仿真分析[J]. , 2009, 30(9): 2862-2868.
[15]	陈保国，郑俊杰，张世飙，马强，赵建斌. 高路堤下涵洞地基处理现场测试与数值模拟研究[J]. , 2009, 30(5): 1483-1489.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed