滑动面倾斜时抗滑桩弹塑性区临界高度的计算

›› 2008, Vol. 29 ›› Issue (7): 1949-1954.

滑动面倾斜时抗滑桩弹塑性区临界高度的计算

周春梅¹，殷坤龙²，简文星²

1.武汉工程大学环境与城市建设学院，武汉 430073；2.中国地质大学工程学院，武汉 430074

收稿日期:2007-06-04 出版日期:2008-07-10 发布日期:2013-07-27
作者简介:周春梅，女，1979年生，博士，讲师，主要从事地质灾害危险性评价与防治技术研究
基金资助:
国家自然科学基金项目（No:40672187）和武汉工程大学校青年基金项目（No. Q200805）。

Calculation of critical height of rock-soil elastoplastic area before anti-slide pile on declining sliding surface

ZHOU Chun-mei¹, YIN Kun-long², JIAN Wen-xing²

1. School of Environment and Civil Construction, Wuhan Institute of Technology, Wuhan 430073, China; 2. Engineering Faculty, China University of Geosciences, Wuhan 430074, China

Received:2007-06-04 Online:2008-07-10 Published:2013-07-27

摘要/Abstract

摘要： 探讨了三峡库区滑坡治理滑面倾斜时抗滑桩桩前岩土体弹塑性区临界高度的计算模式。介绍了常用的确定抗滑桩嵌岩深度的工程地质法和强度控制法，剖析了抗滑桩设计的弹性理论和弹塑性理论，利用空间楔形体极限平衡理论，得出了滑面倾斜时桩前岩土体弹塑性区的临界高度计算公式，并且讨论了弹塑性区临界高度与滑面倾斜角度及岩体的强度参数之间的关系。以三峡库区万州区某滑坡为例，计算了桩前弹塑性区的临界高度，并总结出临界高度与滑面倾角及岩体的黏聚力呈指数分布关系，与岩体的抗力及岩体的内摩擦角呈线性分布关系的规律。根据这些规律可以对抗滑桩嵌岩深度进行修正，并适当地控制抗滑桩嵌岩段岩土体弹塑性区临界高度。

关键词: 滑面倾斜, 抗滑桩, 嵌岩深度, 弹塑性区, 临界高度

Abstract: In light of geo-hazard control in the reservoir area of Three Gorges Project in China, the calculation of critical height of rock-soil elastoplastic area before anti-slide pile on declining sliding surface is carried out with limit equilibrium theory of space wedge block. Firstly, the usual methods of calculating rock-socketed length of anti-slide pile are described, such as engineering geological method and strength controlling method. Secondly, two theories, elastic and elastoplastic theories used to calculating rock-socketed length are compared. Thirdly, the critical height of elastoplastic area of mass before piles is put forword when the slipping surface is declining; meanwhile, the relationships among critical height and angle of sliding surface, resist force of rock and strength parameters of rock are discussed. Finally, taking a project in Wanzhou city of Three Gorges Resevior area for example, the critical elastoplastic height of rock-soil before anti-slide is given; and rules have been found that the critical height h shows a exponential distribution along sliding surface angleθ and cohesion c of rock, and linearly distribution along the resist forceσand friction angleφof rock .According to these rules, we can give proper correction to anti-slide pile’s rock-socketed length and critical height of elastoplastic area of rock-soil before anti-slide pile.

Key words: declining sliding surface, anti-slide pile, rock-socketed length, elastoplastic area, critical height

中图分类号:

TU 473

周春梅，殷坤龙，简文星 . 滑动面倾斜时抗滑桩弹塑性区临界高度的计算[J]. , 2008, 29(7): 1949-1954.

ZHOU Chun-mei , YIN Kun-long , JIAN Wen-xing . Calculation of critical height of rock-soil elastoplastic area before anti-slide pile on declining sliding surface[J]. , 2008, 29(7): 1949-1954.

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