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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

27卷

期数:

2010年02期

页码:

18-24

栏目:

出版日期:

2010-06-20

文章信息/Info

Title:

Empirical Checking Method for Soil Nailing Anti-pulling Capacity

作者:

杨敏^1,2,刘斌^1,2

杨 敏^1,2,刘 斌^1,2

Author(s):

YANG Min^1,2, LIU Bin^1,2

1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

关键词:

基坑;  复合土钉墙;  土钉抗拔承载力;  预应力锚索;  搅拌桩

Keywords:

foundation excavation;  composite soil nailing wall;  soil nailing anti-pulling capacity;  prestressed anchor;  mixing pile

分类号:

TU431

DOI:

-

文献标志码:

A

摘要:

通过对北京、广州等地区11个工程实测的土钉最大轴力值和土钉最大轴力值位置的分析,提出了土钉抗拔承载力的经验验算方法,并采用梯形土压力分布模式和双折线潜在滑裂面分别计算土钉墙、预应力锚索加土钉复合支护及搅拌桩(微型桩)加土钉复合支护的土钉抗拔承载力。结合工程算例,将该方法与中国《建筑基坑支护技术规程》(JGJ 120—99)和《基坑土钉支护技术规程》(CECS 96:97)方法进行了比较。结果表明:采用该方法进行土钉抗拔承载力验算可以满足工程设计要求,为进一步开展复合土钉墙设计方法的研究提供了依据。

Abstract:

Based on the analysis on the measured value and location of the maximum axial force of soil nailing according to the 11 engineering tests located in Beijing, Guangzhou and other areas, an empirical checking method for soil nailing anti-pulling capacity was proposed, which included the soil pressure of trapezoidal distribution and the potential slip surface of bilinear lines. The present method was calculated for soil nailing, the prestressed anchor plus soil nailing composite retaining and the mixing pile(micro-pile)plus soil nailing composite retaining. Combining with the engineering examples, the proposed method was compared with the methods of Chinese Technical Specification for Retaining and Protection of Building Foundation Excavations(JGJ 120—99)and Technical Specification for Soil Nailing in Foundation Excavations(CECS 96:97). Results show that this method can meet the design requirement of soil nailing anti-pulling capacity, and can offer references for further research on the design methods of composite soil nailing walls.

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备注/Memo

备注/Memo:

收稿日期:2010-03-04
基金项目:国家自然科学基金项目(40972179)
作者简介:杨 敏(1960-),男,江西南昌人,教授,博士研究生导师,工学博士,E-mail:yangmin@tongji.edu.cn。

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更新日期/Last Update: 2010-06-20