引汉济渭工程黄三隧洞地应力测试研究
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摘要
通过地应力现场测试,研究引汉济渭工程黄三隧洞地应力场特征。首先介绍水压致裂法基本原理,然后分析现场测试结果得到了水平主应力量值和最大水平主应力方向,讨论了地应力场特征及地应力对隧洞轴向选择的影响。测试区域内,地应力属于中低应力水平,σ_H>σ_h>σ_Z;地应力方向在浅部符合河谷区应力分布一般规律,深部主要受区域构造应力场影响。从地应力角度分析,隧洞轴线选择方向对围岩稳定较为有利。
The crustal stress characteristic of Huangsan tunnel of Hanjiang river diversion project is studied by in-situ measurement of the stress.The principle of hydro-fracturing method is described at first,and then the quantitative value of the horizontal principal stresses and the direction of the maximum horizontal stress are obtained through analyzing the measurement results.At last,the characteristics of crustal stress field are evaluated and the influence of the stress on tunnel axis selection is discussed.The value of crustal stress is at medium-low stress level in the measuring zone,andσ_H>σ_h>σ_Z;stress direction corresponds to the ordinary rules of stress distribution in shallow part, while it is influenced by regional tectonic stress field in deep part.The tunnel axis direction is favorable to the stability of the surrounding rock based on the in-situ stress analysis.
The crustal stress characteristic of Huangsan tunnel of Hanjiang river diversion project is studied by in-situ measurement of the stress.The principle of hydro-fracturing method is described at first,and then the quantitative value of the horizontal principal stresses and the direction of the maximum horizontal stress are obtained through analyzing the measurement results.At last,the characteristics of crustal stress field are evaluated and the influence of the stress on tunnel axis selection is discussed.The value of crustal stress is at medium-low stress level in the measuring zone,andσ_H>σ_h>σ_Z;stress direction corresponds to the ordinary rules of stress distribution in shallow part, while it is influenced by regional tectonic stress field in deep part.The tunnel axis direction is favorable to the stability of the surrounding rock based on the in-situ stress analysis.
引文
[1]张克强.引汉济渭工程前期工作需要研究的问题[J].陕西水利,2008,(1):28-29.
[2]J A Franklin,k kim.Suggested Methods for rock stress determination[J].International Journal of Rock Mechanics Mining Sciences,1987,24(1):53-73
[3]刘允芳.岩体地应力与工程建设[M].武汉:湖北科学技术出版社,2000.
[4]尹健民,罗超文,艾凯.某隧道区地应力测量与岩爆分析[J].岩土力学,2003,24(增1):28-30.
[5]中华人民共和国国家标准编写组.工程岩体分级标准(GB 50218—94)[S].北京:中国计划出版社,1994.
[6]刘亚群,罗超文,李海波,等.南水北调西线工程区地应力测量及地应力场特征分析[J].岩石力学与工程??学报.2005,24(20):3620-3624.
[7]王连捷,丁原辰.引黄隧洞地应力测量[J].地质力学学报,1996,2(1):62-69.
[8]孟永会,马宁.基于水压致裂法的隧道围岩地应力试验研究与岩爆预测分析[J].华中科技大学学报(城市科学版),2008,25(2):55-58.
[9]祁英男,李方全,毛吉震,等.万家寨水利枢纽水压致裂应力测量结果和分析[J].岩石力学与工程学报, 1999,18(2),188-191.
[10]朱焕春,陶振宇.地形地貌与地应力分布的初步分析[J].水利水电技术,1994,(1):29-33.
[11]姜家兰.陕西及其邻近地区现代构造应力场[J].西北地震学报,1991,13(4):85-88.
[12]水利部东北勘测设计研究院.水工隧洞设计规范(SL279—2002)[S].北京:中国水利水电出版社,2003.
[2]J A Franklin,k kim.Suggested Methods for rock stress determination[J].International Journal of Rock Mechanics Mining Sciences,1987,24(1):53-73
[3]刘允芳.岩体地应力与工程建设[M].武汉:湖北科学技术出版社,2000.
[4]尹健民,罗超文,艾凯.某隧道区地应力测量与岩爆分析[J].岩土力学,2003,24(增1):28-30.
[5]中华人民共和国国家标准编写组.工程岩体分级标准(GB 50218—94)[S].北京:中国计划出版社,1994.
[6]刘亚群,罗超文,李海波,等.南水北调西线工程区地应力测量及地应力场特征分析[J].岩石力学与工程??学报.2005,24(20):3620-3624.
[7]王连捷,丁原辰.引黄隧洞地应力测量[J].地质力学学报,1996,2(1):62-69.
[8]孟永会,马宁.基于水压致裂法的隧道围岩地应力试验研究与岩爆预测分析[J].华中科技大学学报(城市科学版),2008,25(2):55-58.
[9]祁英男,李方全,毛吉震,等.万家寨水利枢纽水压致裂应力测量结果和分析[J].岩石力学与工程学报, 1999,18(2),188-191.
[10]朱焕春,陶振宇.地形地貌与地应力分布的初步分析[J].水利水电技术,1994,(1):29-33.
[11]姜家兰.陕西及其邻近地区现代构造应力场[J].西北地震学报,1991,13(4):85-88.
[12]水利部东北勘测设计研究院.水工隧洞设计规范(SL279—2002)[S].北京:中国水利水电出版社,2003.
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