陡倾顺层路堑高边坡变形破坏机制分析

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摘要目前岩土工程界对于自然状态下陡倾顺层岩质边坡稳定性及其变形破坏机理的研究较多，而对于开挖状态下的陡倾顺层路堑高边坡的稳定性及其变形破坏机制研究较少。因此，论文紧密结合工程实际，对陡倾顺层路堑高边坡病害的坡体结构特征及变形破坏机制进行了较为系统的研究。首先，总结了陡倾顺层路堑高边坡病害的变形破坏特征和坡体结构特征；分析了陡倾顺层路堑高边坡病害的稳定性影响因素、变形破坏模式、坡体的受力状态以及变形破坏的四阶段模式；在此基础上提出了陡倾顺层路堑高边坡病害的变形破坏机制。研究结果表明：陡倾顺层路堑高边坡病害的坡体结构决定了其变形破坏的发生发展机制，同时在路堑开挖卸荷和降雨作用等外部促发因素的作用下，导致边坡产生顺层滑移 - 压碎（溃）剪断式破坏。

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	李红卫

关键词 ：边坡工程, 坡体结构, 陡倾顺层, 变形破坏机制, 破坏模式, 边坡受力状态

Abstract：At present, geotechnical engineers comprehensively study the stability and deformation and failure mechanism of natural steeply dipping bedding rock slopes, but it is not enough for the steeply dipping bedding high slopes under excavation works. Here, the researches on the slope structure character and deformation and failure mechanism of steeply dipping bedding high slope diseases are performed based on a treatment project for a actual steeply dipping bedding high slope. First of all, the character of deformation and failure for the slope and the slope structural features about steeply dipping bedding high slope disease are summarized. And then the stability factors, deformation and failure modes, stress state of the slope and four stages modes of deformation and failure of the steeply dipping bedding high slope disease are analyzed. On this basis, the deformation and failure mechanism of the steeply dipping bedding high slope disease is proposed. The results show that the slope structure of steeply dipping bedding high slope disease determines the development of deformation and failure mechanism, meanwhile under the effect of the external trigger factors, including excavation unloading and rainfall and so on, it will result in the slope damaged by the mode of bedding slip - crushing (collapse) sheared.

Key words： slope engineering slope structure steeply dipping bedding deformation and failure mechanism destruction patterm stress state

收稿日期: 2011-04-29

TU47

作者简介: 李红卫 (1982 – ) ，男，河北邯郸人，硕士，助理工程师，主要从事山区滑坡及高边坡地质灾害防治技术的研究与设计工作。

引用本文:

李红卫. 陡倾顺层路堑高边坡变形破坏机制分析[J]. 岩土工程学报, 2011, 33(zk1): 146-151. LI Hong-wei. Deformation and failure mechanism of steeply dipping bedding high slopes. Chinese J. Geot. Eng., 2011, 33(zk1): 146-151.

链接本文:

http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/ 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2011/V33/Izk1/146

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