滑坡灾害的机制与力学特性分析

doi:10.13722/j.cnki.jrme.2016.0804

摘要
图/表
参考文献(11)
相关文章 (15)

全文: PDF (1992 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要滑坡灾害主要是指滑体突然产生较大的土体滑动，巨大的滑动力会摧毁其所遇到的建筑物，造成重大的损失。本文采用数值方法的变模量强度折减法，分析滑坡滑动的位移变化过程，发现牵引式滑坡位移突变性大于推移式滑坡，更容易产生滑坡灾害；相反，推移式滑坡在滑动前会有明显的预警位移，因此提出“塑性”坡的概念，“塑性”坡发生灾害滑动前有显著的变形预警，这样，“塑性”坡可以避免或减少滑坡的灾害。此外，通过计算实例的分析结果，表明牵引式滑坡或当滑面上存在应力水平差异大的情况时，整体极限稳定分析法的安全系数存在偏大的风险。上述结论为避免或减少滑坡灾害开辟新的研究思路。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	杨光华1
	2
	3
	钟志辉1
	3
	4
	张玉成1
	2
	傅旭东3

关键词 ：边坡工程, 滑坡, 应力水平, 位移, 变模量强度折减法, 塑性坡

Abstract：Landslide disaster mainly means that the sliding body suddenly produces massive soil sliding. Great sliding force could destroy construction，which would cause great losses. The variable-modulus strength reduction method is adopted to analyze displacement process before landslide sliding. It is found that the displacement of retrogressive landslide is more mutational than displacement of thrust load-caused landslide. The retrogressive landslide causes landslide disaster much easier. In contrast，thrust load-caused landslide has obvious warning displacement；therefore，the concept of plastic slope is proposed. Plastic slope can avoid or reduce landslide disaster. In addition，analysis results of calculation examples show that in retrogressive landslide or when the stress level in different part of sliding surface is very different，safety factor by the traditional limit equilibrium method has risk of overestimation. The above conclusions would give new research ideas to avoid or reduce landslide disaster.

Key words： slope engineering landslide stress level displacement variable-modulus strength reduction method plastic slope

引用本文:

杨光华1，2，3，钟志辉1，3，4，张玉成1，2，傅旭东3. 滑坡灾害的机制与力学特性分析[J]. 岩石力学与工程学报, 2016, 35(S2): 4009-4017.
YANG Guanghua1，2，3，ZHONG Zhihui1，3，4，ZHANG Yucheng1，2，FU Xudong3. Analysis of mechanism and mechanical characteristics of landslide disaster. , 2016, 35(S2): 4009-4017.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.0804 或 https://rockmech.whrsm.ac.cn/CN/Y2016/V35/IS2/4009

[1] 黄润秋. 20世纪以来中国的大型滑坡及其发生机制[J]. 岩石力学与工程学报，2007，26(3)：433–454.(HUANG Runqiu. Large-scale landslides and their sliding mechanisms in china since the 20th century[J]. Journal of Rock Mechanics and Engineering，2007，26(3)：433–454.(in Chinese))

[2] DUNCAN J M，CHANG C Y．Nonlinear analysis of stress and strain in soils[J]. Journal of the Soil Mechanics and Foundations Division，1970，96(5)：1 629–1 653.

[3] 杨光华. 残积土上基础非线性沉降的双曲线模型的研究[C]// 第7届全国岩土力学数值分析与解析方法讨论会论文集. 大连：大连理工大学出版社，2001：168–171.(YANG Guanghua. Hyperbola model for calculating the nonlinear settlement of foundation on granite residual soil[C]// Proceedings of the 7th National Conference on the Numerical Analysis and Analytical Method for Rock and Soil Mechanics. Dalian：Dalian University of Technology Press，2001：168–171.(in Chinese))

[4] 杨光华. 地基非线性沉降计算的原状土切线模量法[J]. 岩土工程学报，2006，28(11)：1 927–1 931.(YANG Guanghua. Nonlinear settlement computation of the soil foundation with the undisturbed soil tangent modulus method[J]. Chinese Journal of Geotechnical Engineering，2006，28(11)：1 927–1 931.(in Chinese))

[5] 杨光华，张玉成，张有祥. 变模量弹塑性强度折减法及其在边坡稳定分析中的应用[J]. 岩石力学与工程学报，2009，28(7)：1 506– 1 512.(YANG Guanghua，ZHANG Yucheng，ZHANG Youxiang. Variable modulus elastoplastic strength reduction method and its application to slope stability analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(7)：1 506–1 512.(in Chinese))

[6] YANG G H，ZHONG Z H，FU X D，et al. Slope analysis based on local strength reduction method and variable-modulus elasto-plastic model[J]. Journal of Central South University，2014，21(5)：2 041–2 050.

[7] 郑宏，李春光，李悼芬，等. 求解安全系数的有限元法[J]. 岩土工程学报，2002，24(5)：626–628.(ZHENG Hong，LI Chunguang， LEE C F，et al. Finite element method for solving the factor of safety[J]. Chinese Journal of Geotechnical Engineering，2002，24(5)：626–628.(in Chinese))

[8] 杨光华，钟志辉，张玉成，等. 用局部强度折减法进行边坡稳定性分析[J]. 岩土力学，2010，31(增2)：53–58.(YANG Guanghua，ZHONG Zhihui，ZHANG Yucheng，et al. Slope stability analysis by local strength reduction method[J]. Rock and Soil Mechanics，2010，31(Supp.2)：53–58.(in Chinese))

[9] 钟志辉，杨光华，张玉成，等. 基于局部强度折减法的土质边坡位移研究[J]. 岩土工程学报，2011，33(增1)：196–201.(ZHONG Zhihui，YANG Guanghua，ZHANG Yucheng，et al. Displacement of soil slopes based on local strength reduction method[J]. Chinese Journal of Geotechnical Engineering，2011，33(Supp.1)：196–201.(in Chinese))

[10] 杨光华，钟志辉，张玉成，等. 根据应力场和位移场判断滑坡的破坏类型及确定最优加固位置[J]. 岩石力学与工程学报，2012，31(9)：1 879–1 887.(YANG Guanghua，ZHONG Zhihui，ZHANG Yucheng，et al. Identification of landslide type and determination of optimal reinforcement site based on stress field and displacement field[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(9)：1 879–1 887.(in Chinese))

[11] 郑颖人，赵尚毅，宋雅坤. 有限元强度折减法研究进展[J]. 后勤工程学院学报，2005，(3)：1–6.(ZHENG Yingren，ZHAO Shangyi，SONG Yakun. Advance of study on the strength reduction finite element method[J]. Journal of Logistical Engineering University，2005，(3)：1–6.(in Chinese))