| 土石混合体工程地质力学特性及其结构效应研究 |
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| 引用本文： | 胡瑞林,李晓,王宇,高玮,夏加国,李志清,高文伟,孙永帅.土石混合体工程地质力学特性及其结构效应研究[J].工程地质学报(英文版),2020,28(2):255-281. |
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| 作者姓名： | 胡瑞林 李晓 王宇 高玮 夏加国 李志清 高文伟 孙永帅 |
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| 作者单位： | ①.中国科学院地质与地球物理研究所，北京 100029，中国 |
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| 基金项目： | 国家自然科学基金41330643 |
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| 摘 要： | 土石混合体是一种土-石混杂、分布广泛、性质特殊的地质体,也是众多山区滑坡的重要载体.复杂的土-石结构组成是此类介质物理力学特性复杂、难以把控的关键.本文通过多尺度宏-微观室内和现场物理力学试验与模拟,对土石混合体的强度特性、变形特性和渗透特性及其结构控制机理展开了深入研究,系统阐明了含石量、块石形状、基质组分、土-石级配等关键结构因子的制约规律,进一步揭示了土石混合体强度和变形特征随机性的土石结构控制规律,提出了不同结构状态下强度参数的正确获取方法;研究了不同含石量土石混合体的非线性渗透特性,获得了非线性渗流计算模型及其抗渗变形优化设计方法,为全面建立基于真实土石结构和非线性本构关系的新一代土石混合体滑坡预测预警体系提供一定的理论支撑.
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| 关 键 词： | 土石混合体 工程地质力学 强度特性 变形特性 渗透特性 土石结构 控制机理 |
| 收稿时间： | 2019-12-03 |
RESEARCH ON ENGINEERING GEOMECHANICS AND STRUCTURAL EFFECT OF SOIL-ROCK MIXTURE |
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| HU Ruilin,LI Xiao,WANG Yu,GAO Wei,XIA Jiaguo,LI Zhiqing,GAO Wenwei,SUN Yongshuai.RESEARCH ON ENGINEERING GEOMECHANICS AND STRUCTURAL EFFECT OF SOIL-ROCK MIXTURE[J].Journal of Engineering Geology,2020,28(2):255-281. |
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| Authors: | HU Ruilin LI Xiao WANG Yu GAO Wei XIA Jiaguo LI Zhiqing GAO Wenwei SUN Yongshuai |
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| Institution: | ①.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China②.University of Chinese Academy of Sciences, Beijing 100049, China③.University of Science & Technology, Beijing 100083, China④.China Nuclear Power Engineering Co., Ltd., Beijing 100840, China⑤.Yan'an University, Yan'an 716000, China⑥.China Agricultural University, Beijing 100083, China |
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| Abstract: | Soil-rock mixture (S-RM) is one of the widely distributed and unique geological materials in China and around the world. It is composed of loose rocks and soil, and has become a key carrier for mountain geological hazards. The complex structure of S-RM is the key to evaluate its special physical and mechanical properties. In this paper, the strength, deformation and permeability characteristics of S-RM and its structural control mechanisms are thoroughly studied, based on the multi-scale macro and micro tests, physical and mechanical field tests, numerical simulation, in order to interpret the control mechanisms of crucial structure factors. The factors include rock proportion, soil-rock shape, matrix composition and internal soil-rock granularity composition. Furthermore, the soil-rock control laws of the randomness of the S-RM strength and deformation characteristics are determined. In addition, much more accurate acquisition methods of strength parameters in different structural states are also proposed. The nonlinear seepage calculation model and its optimal design method of anti-seepage deformation are obtained, through the study on the nonlinear permeability characteristics of S-RM with different stone contents. In summary, this study provides a certain theoretical support for the comprehensive establishment of new generation of S-MR landslide early-warning system, based on the real soil-rock structures and nonlinear constitutive relation. |
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| Keywords: | Soil-rock mixture Engineering geomechanics Strength characteristics Deformation characteristics Permeability characteristics Soil-rock structure Control mechanism |
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