大断面硐室围岩塑性区变形及稳定性控制
Plastic Deformation and Stability Control of Large Section Cavern Surrounding Rock
-
摘要: 针对蓄水电站排水大断面硐室围岩塑性变形失稳问题,采用现场调研与弹塑性理论及损伤理论相结合的方法,建立了支护作用下硐室围岩变形力学模型,推导出了围岩塑性区半径及其变形解析解,并运用算例分析了围岩塑性区半径及变形演化规律。同时,采用钻孔窥视仪探测了大断面硐室围岩破坏特征,提出了采用浅部锚固-深部悬吊与注浆相结合的支护方法对大断面硐室围岩的稳定性进行控制。经现场实践表明,该方法能够使大断面硐室围岩变形及整体性得到有效控制,围岩的稳定性得到保障。Abstract: In view of the deformation and instability characteristics of large section cavern surrounding rock, based on filed investigation, elastoplastic theory and damage theory, mechanical model of surrounding rock deformation of cavern with support was established, and the analytical solution for radius and deformation of plastic zone of the cavern surrounding rock were derived. Through example analysis, the radius of plastic zone and deformation evolution laws of surrounding rock were analyzed. Failure characteristics of surrounding rock were detected by borehole peep meter. Support method of shallow anchoring and deep suspension and grouting was proposed for controlling stability of carven surrounding rock. Field application showed that the method can effectively control deformation and integrity of surrounding rock, and stability of surrounding rock was guaranteed.
-
-
[1] 胡夏嵩,赵法锁.低地应力区地下硐室围岩变形破坏有限元数值模拟研究[J].岩石力学与工程学报,2005,24(10):1708-1714. [2] 王启耀,杨林德,赵法锁.陡倾角层状岩体中地下硐室围岩的变形[J].长安大学学报(自然科学版),2006, 26(5):69-73. [3] 宋义敏,潘一山,章梦涛,等.深部高应力载荷作用下的硐室变形破坏实验[J].辽宁工程技术大学学报(自然科学版),2008,27(4):489-491. [4] 赵文斌,于红周,于广云,等.深埋与浅埋软岩硐室的开挖变形[J].力学与实践,2013,35(2):56-61. [5] 袁文伯,陈进.软化岩层中巷道塑性区与破碎区分析[J].煤炭学报,1986(3):77-86. [6] 陆晓敏,任青文.基于有限元与块体元法的地下硐室变形及稳定分析[J].工程力学,2001,18(4):60-66. [7] 范文,俞茂宏,陈立伟,等.考虑剪胀及软化的硐室围岩弹塑性分析的统一解[J].岩石力学与工程学报, 2004,23(19):3213-3220. [8] 吴清星,陈洁,陈素侠.基于Hoek-Brown强度准则的硐室稳定影响分析[J].科学技术与工程,2012,12(21):5371-5374. [9] 张勇,肖平西,丁秀丽,等.高地应力条件下地下厂房硐室群围岩的变形破坏特征及对策研究[J].岩石力学与工程学报,2012,31(2):228-244. [10] 张练,丁秀丽,付敬,等.惠州抽水蓄能电站地下厂房硐室围岩稳定性分析[J].岩石力学与工程学报,2003,22(S1):2206-2209. [11] 王仁.塑性力学引论[M].北京:北京大学出版社,1992.
计量
- 文章访问数: 111
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
