高原碎石土力学成因比较特殊，且在西藏高原地区分布十分广泛碎石土边坡的稳定性问题又与碎石土的抗剪强度密切相关，因此科学地开展碎石土的力学试验，准确地获取其抗剪强度指标是解决工程中碎石土强度问题的基础。详细阐述碎石土大型剪切试验的国内外研究现状，采用大型室内及现场两用直剪仪分析西藏邦铺矿区碎石土力学性质。并结合大型剪切试验、室内试验成果、理论公式，利用国际知名软件FLAC3D建立地质模型，分析了西藏邦铺北东碎石土边坡稳定性，为同类型碎石土地区边坡稳定性分析提供了可行的研究方法。
Abstract
Plateau gravel soil is widely distributed in the Tibet Plateau. The shear strength of gravel soil is closely related with the stability of slope. In the present research, large-scale shear tests on gravel soils in China and abroad are reviewed firstly. By using the large-scale indoor and field dual-purpose direct shear apparatus, the mechanical properties of gravel soils in Bangpu mining area in Tibet are analyzed.Furthermore, in association with direct shear test and indoor test results as well as theoretical formulas, a geological model is established in FLAC3D to analyze the slope stability in this area. The research results offer a feasible method for similar analysis on gravel soils.
关键词
高原碎石土 /
大型剪切试验 /
边坡 /
稳定性分析
Key words
plateau gravel soil /
large direct shear test /
slope /
stability analysis
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参考文献
[1]董 云. 土石混合料力学特性的试验研究文[D]. 重庆; 重庆交通学院,2005.(DONG Yun. Experimental Study on the Mechanical Properties of Earth-rock Material[D]. Chongqing; Chongqing Jiaotong University,2005.(in Chinese)
[2] 闫勋念.粗粒土力学特性三轴试验与模拟研究[D]. 南京;河海大学,2006.(YAN Xun-nian. Triaxial Test and Simulation on the Mechanical Property of Coarse Grain Soil[D]. Nanjing; Hohai University,2006.(in Chinese)
[3] 申存科.粗粒土的颗粒破碎特性与本构关系研究[D].大连;大连理工大学,2009.(SHEN Cun-ke. Breakage Behavior of Coarse-grain Soil and Research on Its Constitutive Relation[D]. Dalian; Dalian University of Technology,2009.(in Chinese)
[4] 闵 弘,刘小丽,魏进兵,等.大型现场室内两用直剪仪研制(I);结构设计[J]. 岩土力学,2006,27(1); 164-168.(MIN Hong,LIU Xiao-li,WEI Jin-bing,et al. A New Large Direct Shear Apparatus for Field and Laboratory Test (I); Configuration[J]. Rock and Soil Mechanics,2006,27(1); 164-168.(in Chinese)
[5] 王 舒.土工大直剪仪的开发及应用研究[D].长沙;长沙理工大学,2009.(WANG Shu. Development and Application of Large-scale Geotechnical Direct Shear Apparatus[D]. Changsha; Changsha University of Science and Technology,2009.(in Chinese)
[6] 高玉峰,张 兵,刘 伟,等.堆石料颗粒破碎特征的大型三轴试验研究;结构设计[J]. 岩土力学,2009,30(50); 1237-1246.(GAO Yu-feng,ZHANG Bing,LIU Wei,et al. Experimental Study on Particle Breakage Behavior of Rockfill in Large-scale Triaxial Tests; Configuration[J]. Rock and Soil Mechanics,2009,30(50); 1237-1246.(in Chinese)
[7] 范孟华,张 慧.对土压缩模量定义及相关问题的探讨[J].路基工程,2006,(6);62-64.(FAN Meng-hua,ZHANG Hui. Discussion on the Definition of Soil Compressive Modulus and Related Issues[J]. Subgrade Engineering,2006,(6); 62-64.(in Chinese)
基金
国家自然科学基金面上项目(41172281)；中央高校基本科研业务费专项资金项目(摇篮人才计划CUGL100413、特色学科团队CUG090104)；国家科技部973项目(2011CB710604)
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