边坡模型边界效应及材料孔隙率敏感性研究

›› 2010, Vol. 31 ›› Issue (S1): 23-27.

边坡模型边界效应及材料孔隙率敏感性研究

刘东燕¹，郑志明^{1, 2}，侯龙^{1, 3}

1.重庆大学土木工程学院，重庆 400045；2.重庆市公路局，重庆 401147；3.美国科罗拉多矿业大学，美国丹佛 80401

收稿日期:2010-04-23 出版日期:2010-08-10 发布日期:2010-09-09
作者简介:刘东燕，男，1959年生，教授，博士生导师，主要从事地质灾害、地下空间开发等方面的研究；
基金资助:
交通部西部交通建设科技项目（No. 2009318000001）。

Research on boundary condition effect and material porosity sensitivity for slope model

LIU Dong-yan¹, ZHENG Zhi-ming ^{1, 2}, HOU Long ^{1, 3}

1. College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. Chongqing Highway Bureau, Chongqing 401147, China; 3.Colorado University of Mines, Denver 80401, USA

Received:2010-04-23 Online:2010-08-10 Published:2010-09-09

摘要/Abstract

摘要：

通过自制的新型试验装置进行不同边界情况下的边坡模型变形破坏研究。探讨了边坡模型破坏开始时的坡角（破坏角）与边界条件的关系。试验结果表明，该破坏角会与模型厚度成一定的反比关系，但随着模型厚度超过一定值，边界条件造成的影响将趋于弱化，同时，运用数学手段定量地印证了这种关系形式。另外，还通过试验验证了相比于边界条件而言，破坏角的变化幅度会对模型材料的孔隙率更加敏感。基于所得结果，可对试验装置进行改进，并优化试验手段。

关键词: 边坡模型, 破坏角, 边界效应, 孔隙率, 变化幅度

Abstract:

Using a new apparatus which was fabricated by ourself, some research works on the stability of slope model under different boundary conditions effect were finished. Based on some associated results, the relationship between landslide start degree and boundary condition effect can be got. From the relationship, it can see clearly that the degree will decrease as the slope’s thickness increases and it will keep at a constant degree value when the thickness is relative big; namely, the influence induced by boundary condition effect can be ignored at that time. At the same time, one theoretical method was involved to quantify and confirm this relationship. In addition, the comparison between boundary condition effect and porosity indicates that the porosity is a more sensitive factor as to the range in variation of landslide start degree than the boundary condition effect. Based on these results, we can take some modification work for this experimental apparatus and get an optimization resolution for latter tests.

Key words: slope model, landslide start degree, boundary condition effect, porosity, range in variation

中图分类号:

TU 411

刘东燕，郑志明，侯龙. 边坡模型边界效应及材料孔隙率敏感性研究[J]. , 2010, 31(S1): 23-27.

LIU Dong-yan, ZHENG Zhi-ming, HOU Long. Research on boundary condition effect and material porosity sensitivity for slope model[J]. , 2010, 31(S1): 23-27.

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