滇中红层坝基溶蚀岩体及物理力学特性研究

doi:10.3969/j.issn.1001-5485.2014.11.0012014,31(11):1-6

长江科学院院报 ›› 2014, Vol. 31 ›› Issue (11): 1-6.DOI: 10.3969/j.issn.1001-5485.2014.11.0012014,31(11):1-6

• 水工岩石力学专辑 • 下一篇

滇中红层坝基溶蚀岩体及物理力学特性研究

王昆^1,2,王忠²,高强²

1.河海大学地球科学与工程学院, 南京 210098;
2中国电建集团昆明勘测设计研究院有限公司地质分院, 昆明 650051

收稿日期:2014-07-24 修回日期:2014-11-05 出版日期:2014-11-01 发布日期:2014-11-05
作者简介:王昆(1966-),男,云南大理人,教授级高级工程师,主要从事水电水利工程地质、岩土工程勘察及地质灾害防治工程勘察设计工作,(电话)0871-63062143(电子信箱)346370968@qq.com。
基金资助:
云南省技术创新人才培养对象资助项目(2010CI056)

Karstic Rock Mass of Dam Foundation and Its Physical and Mechanical Properties in the Red Beds of Central Yunnan Province

WANG Kun^1,2, WANG Zhong², GAO Qiang²

1. School of Earth Science and Engineering, Hohai University, Nanjing 210098, China;
2. Department of Engineering Geology, Power China Kunming Engineering Corporation Limited, Kunming 650051, China

Received:2014-07-24 Revised:2014-11-05 Online:2014-11-01 Published:2014-11-05

摘要/Abstract

摘要：

金沙江观音岩水电站双折混合坝中混凝土重力坝部分坝基位于中生代侏罗系中统蛇店组J₂s砾岩、砂岩为主的滇中红层地层上,而岩石胶结物溶蚀现象不利于坝基岩体稳定。为此,在我国红层分布特点基础上,分析了滇中红层沉积、分布特征,系统地研究了红层坝基碎屑岩因胶结物溶蚀而出现的喀斯特现象以及岩体出现小的溶洞、溶孔、溶蚀裂隙及岩体解体、砂化、结构变坏等特征,并进行了红层坝基溶蚀岩体物理力学性质试验研究。结果表明溶蚀岩体分布特征及其岩体质量力学参数指标达到Ⅲa和Ⅲb类岩体质量要求,坝基适当处理可满足建基面要求。研究成果为坝基建基面确定、溶蚀岩体地质缺陷处理提供了依据。

关键词: 滇中红层, 溶蚀, 坝基物理力学特性, 观音岩水电站

Abstract:

Guanyinyan hydropower station on the Jinsha River is a double fold mixed dam. Its concrete gravity dam foundation is located in the red beds of central Yunnan Province and mainly contains conglomerate and sandstone of J₂s stratum, in which dissolution affects the stability of foundation rock mass. According to the distribution of red beds in China, we analysed the deposition and distribution features of red beds in Yunnan and systematically researched the features of karst in red beds of clastic rock as well as some small caves, dissolution holes and cracks. We also conducted tests on the physical and mechanical properties of karstic rock mass in red beds. The results show that the distribution characteristics and mechanical parameters of karstic rock mass could reach the quality of Ⅲa, Ⅲb classes, and meet the dam foundation requirement when appropriately treated. The research achievements provide basis for selecting dam foundation and treating geological defects of karstic rock mass.

Key words: red beds in central Yunnan, solution, physical and mechanical properties of foundation, Guanyinyan hydropower station

中图分类号:

TU452

王昆,王忠,高强. 滇中红层坝基溶蚀岩体及物理力学特性研究[J]. 长江科学院院报, 2014, 31(11): 1-6.

WANG Kun, WANG Zhong, GAO Qiang. Karstic Rock Mass of Dam Foundation and Its Physical and Mechanical Properties in the Red Beds of Central Yunnan Province[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2014, 31(11): 1-6.

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滇中红层坝基溶蚀岩体及物理力学特性研究

Karstic Rock Mass of Dam Foundation and Its Physical and Mechanical Properties in the Red Beds of Central Yunnan Province

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