松动岩体工程特性研究——以雅砻江楞古水电站松动岩体为例

doi:10.13278/j.cnki.jjuese.20180189

吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (5): 1376-1388.doi: 10.13278/j.cnki.jjuese.20180189

松动岩体工程特性研究——以雅砻江楞古水电站松动岩体为例

王梓龙^1,2, 裴向军¹, 张御阳¹, 张硕¹, 魏小佳³, 王双³

1. 西南科技大学城市学院, 四川绵阳 621000;
2. 成都理工大学地质灾害防治与地质环境保护国家重点实验室, 成都 610059;
3. 四川志德岩土勘察有限公司, 成都 610059

收稿日期:2018-07-20 发布日期:2019-10-10
作者简介:王梓龙(1988-),男,讲师,博士,主要从事水电高边稳定性、地质灾害监测方面教学和研究,E-mail:wang-zilong.h@foxmail.com
基金资助:
国家自然科学基金项目（41572302）；四川省国土资源厅科学研究计划（KJ-2015-18）

Engineering Characteristics of Loose Rock Mass: Taking Loose Rock Mass of Lenggu Hydropower Station in Yalong River as an Example

Wang Zilong^1,2, Pei Xiangjun¹, Zhang Yuyang¹, Zhang Shuo¹, Wei Xiaojia³, Wang Shuang³

1. City College, Southwest University of Science and Technology, Mianyang 621000, Sichuan, China;
2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China;
3. Sichuan Zhide Geotechnical Survey Co., Ltd., Chengdu 610059, China

Received:2018-07-20 Published:2019-10-10
Supported by:
Supported by National Natural Science Foundation of China (41572302) and Scientific Research Program of Sichuan Land and Resources Department(KJ-2015-18)

摘要/Abstract

摘要： 为了对松动岩体的工程特性进行系统研究，以楞古水电站厂址区边坡为例，对该边坡岩体进行了详细的地质编录和物理勘探试验，重点对节理裂隙的空间发育规律、镶嵌结构和碎裂结构岩体的发育深度及空间分布、软弱结构面发育分布规律以及边坡已有变形破坏特征这四个方面进行了系统的统计和分析，认为松动岩体是区域断裂活动和浅表生改造的结果，岩体工程效应差、变形模量低；同时结合应力测试、声波测速、高密度电磁勘探等试验成果进行分析，结果显示松动岩体具低波速（波速大部分小于3 000 m/s）、低应力（最大主应力不超过20 MPa）、强透水性（透水性系数大于10 L/（min·m·m））。认为岩体破碎主要受断层及节理裂隙影响，分析了岩体破裂松动的演化过程及特征。

关键词: 松动岩体, 工程特性, 卸荷作用, 岩体质量

Abstract: In order to systematically study the engineering characteristics of loose rock masses, a detailed geological cataloging and physical prospect testing of the slope rock mass in the area of Lenggu hydropower station were carried out, and the spatial development law of joints and fissures, the development depth and spatial distribution of mosaic and cataclastic rock masses, and the weak structural planes were mainly studied. The systematic statistics and analysis were conducted on the development and distribution of rock masses and the deformation and failure characteristics of the slope. The results show that the rock mass engineering effect is poor,and the deformation modulus is low. The wave velocity of most loose rock masses is less than 3 000 m/s, the maximum principal stress is less than 20 MPa, and the permeability coefficient is greater than 10 L/(min·m·m). The evolution process and characteristics of rock mass fractures and loosening are analyzed combined with the experimental results of stress test, acoustic velocity measurement, and high density electromagnetic exploration. It is concluded that loose rock masses are the result of regional fracture activity and shallow transformation, and rock mass fractures are mainly affected by faults and joints.

Key words: dynamo-relaxed rock mass, engineering characteristics, unloading effect, rock mass quality

中图分类号:

P642.21

王梓龙, 裴向军, 张御阳, 张硕, 魏小佳, 王双. 松动岩体工程特性研究——以雅砻江楞古水电站松动岩体为例[J]. 吉林大学学报(地球科学版), 2019, 49(5): 1376-1388.

Wang Zilong, Pei Xiangjun, Zhang Yuyang, Zhang Shuo, Wei Xiaojia, Wang Shuang. Engineering Characteristics of Loose Rock Mass: Taking Loose Rock Mass of Lenggu Hydropower Station in Yalong River as an Example[J]. Journal of Jilin University(Earth Science Edition), 2019, 49(5): 1376-1388.

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松动岩体工程特性研究——以雅砻江楞古水电站松动岩体为例

Engineering Characteristics of Loose Rock Mass: Taking Loose Rock Mass of Lenggu Hydropower Station in Yalong River as an Example

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