大岗山地下厂房洞群施工开挖围岩稳定性分析

王建洪; 贺如平; 魏映瑜

doi:10.3969/j.issn.1001-5485.2014.11.0202014,31(11):97-101

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长江科学院院报 ›› 2014, Vol. 31 ›› Issue (11) : 97-101. DOI: 10.3969/j.issn.1001-5485.2014.11.0202014,31(11):97-101

地下洞室围岩稳定

大岗山地下厂房洞群施工开挖围岩稳定性分析

王建洪,贺如平,魏映瑜

作者信息 +

Stability Analysis for Surrounding Rock Mass of Dagangshan Underground Powerhouse During Construction Excavation

WANG Jian-hong, HE Ru-ping, WEI Ying-yu

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文章历史 +

摘要

为分析大岗山水电站地下厂房洞室群施工开挖过程中围岩的稳定性状况,采用多元回归分析方法反演了厂区初始地应力场,提出了厂区初始地应力的分布函数;根据建立的地下厂房三维数值计算模型,获得洞室开挖后围岩位移场、应力场和塑性区的变化规律。计算结果表明大岗山地下厂房洞室群开挖后围岩整体是稳定的,洞周分布的软弱岩脉是影响围岩稳定的关键因素,在地下厂房施工过程中,必须对软弱岩脉和开挖暴露的破碎带进行超前注浆加固处理。计算成果有效指导了工程的设计与施工。

Abstract

Dagangshan hydroelectric power station is a large scale hydropower project developed recently on the Dadu River. In order to analyze the stability of surrounding rock of underground powerhouse caverns during construction excavation, the multiple regression analysis method is employed to inverse the initial geostress field of plant zone, and the functions of initial stress distribution are proposed. The variation regularities of displacement field, stress field and plastic zone of underground powerhouse caverns after excavation are obtained according to the established 3-D numerical computational model. Computing results show that the surrounding rock of Dagangshan underground caverns is stable as a whole after excavation. The weak rock veins are key factors influencing the stability of surrounding rock of underground powerhouse. The soft rock veins and fracture zone must be pre-grouted and reinforced during construction. These computation conclusions have guided the design and construction of the project effectively.

导出引用

王建洪,贺如平,魏映瑜. 大岗山地下厂房洞群施工开挖围岩稳定性分析[J]. 长江科学院院报. 2014, 31(11): 97-101 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0202014,31(11):97-101

WANG Jian-hong, HE Ru-ping, WEI Ying-yu. Stability Analysis for Surrounding Rock Mass of Dagangshan Underground Powerhouse During Construction Excavation[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(11): 97-101 https://doi.org/10.3969/j.issn.1001-5485.2014.11.0202014,31(11):97-101

中图分类号： TV22

参考文献

[1] 孙红月,尚岳全,张春生. 大型地下洞室围岩稳定性数值模拟分析. 浙江大学学报(工学版),2004,38(1):70-73. (SUN Hong-yue,SHANG Yue-quan, ZHANG Chun-sheng. Numerical Modeling Analysis for Surrounding Rock Mass Stability of Large Underground Cavities. Journal of Zhejiang University(Engineering Science),2004,38(1):70-73.(in Chinese))
[2] 杨明举,常艄东. 超大型地下洞室群施工开挖程序及围岩稳定分析. 西南交通大学学报,2000,35(1):33-35.(YANG Ming-ju,CHANG Shao-dong. The Excavation Procedure of Super-large Underground Chambers and the Surrounding Rock Stability. Journal of Southwest Jiaotong University,2000,35(1):33-35. (in Chinese))
[3] 钟登华,张伟波,郑家详. 大型地下洞室群施工系统仿真. 水利学报,2001,(9):86-91.(ZHONG Deng-hua,ZHANG Wei-bo,ZHENG Jia-xiang. Construction System Simulation of Large Scale Underground Structure Group. Journal of Hydraulic Engineering,2001,(9):86-91. (in Chinese))
[4] 白明州,黄国明. 大型地下洞室围岩稳定的三维有限元分析. 西部探矿工程,2000,(1):63-65.(BAI Ming-zhou,HUANG Guo-ming. Three Dimensional Finite Element Analysis about Stability of Surrounding Rock Mass of Giant Underground Cavity. West-china Exploration Engineering,2000,(1):63-65. (in Chinese))
[5] 朱维申,李晓静,郭彦双,等. 地下大型洞室群稳定性的系统性研究. 岩石力学与工程学报,2004,23(10):1689-1693.(ZHU Wei-shen,LI Xiao-jing,GUO Yan-shuang,et al. Systematical Study on Stability of Large Underground Houses. Chinese Journal of Rock Mechanics and Engineering,2004,23(10): 1689-1693. (in Chinese))
[6] 朱万成,唐春安. 地下洞室开挖与支护有限元分析. 岩土工程技术,2000,(1):2-6.(ZHU Wan-cheng,TANG Chun-an. Finite Element Analysis about Stability of Surrounding Rock Mass of Giant Underground Cavity. Geotechnical Engineering Technique,2000,(1):2-6.(in Chinese))
[7] 朱以文,黄克戬,李伟. 地应力对地下洞室开挖的塑性区影响研究. 岩石力学与工程学报,2004,23(8):1344-1348.(ZHU Yi-wen,HUANG Ke-jian,LI Wei. Study on Effect of In-situ Stresses on Plastic Region Induced by Excavations of Underground Openings . Chinese Journal of Rock Mechanics and Engineering,2004,23(8):1344-1348. (in Chinese))
[8] 王颂,何沛田. 江口水电站地下厂房围岩稳定性研究. 地下空间与工程学报,2006,2(8):1460-1464. (WANG Song,HE Pei-tian. Research on the Surrounding Rock Stability of Jiangkou Hydroelectric Power Station Underground Workshop. Chinese Journal of Underground Space and Engineering,2006,2(8):1460-1464. (in Chinese))
[9] 董志高,吴继敏,施志群,等. 某水电站地下厂房区初始地应力场回归分析. 河海大学学报(自然科学版),2003,31(5): 543-546.(DONG Zhi-gao,WU Ji-min,SHI Zhi-qun,et al. Regression Analysis of Initial Geostress for an Underground Power Plant Region. Journal of Hohai University(Natural Sciences),2003,31(5): 543-546. (in Chinese))
[10]胡斌,冯夏庭,黄小华,等. 龙滩水电站左岸高边坡区初始地应力场反演回归分析. 岩石力学与工程学报,2005,24(22): 4055-4064.(HU Bin,FENG Xia-ting,HUANG Xiao-hua,et al. Regression Analysis of Initial Geostress Field for Left Bank High Slope Region at Longtan Hydropower Station. Chinese Journal of Rock Mechanics and Engineering,2005,24(22): 4055-4064. (in Chinese))
[11]艾凯,韩晓玉,李永松. 金沙江乌东德水电站地应力场回归分析. 地下空间与工程学报,2006,6(12): 930-933.(AI Kai,HAN Xiao-yu,LI Yong-song. Regression Analysis of In-situ Stress for Wudongde Hydropower Station,Jinsha River. Chinese Journal of Underground Space and Engineering,2006,6(12): 930-933. (in Chinese))
[12]戚蓝,丁志宏,马斌,等. 初始地应力场多元方程回归分析. 岩土力学,2003,24(增刊): 137-139.(QI Lan,DING Zhi-hong,MA Bin,et al. Regression Analysis of Initial In-situ Stress Field with Multiple Variables and Equations. Rock and Soil Mechanics,2003,24(Sup.): 137-139. (in Chinese))
[13]付成华,汪卫明,陈胜宏. 溪洛渡水电站坝区初始地应力场反演分析研究. 岩石力学与工程学报,2006,25(11): 2305-2312.(FU Cheng-hua,WANG Wei-ming,CHEN Sheng-hong. Back Analysis Study on Initial Geostress Field of Dam Site for Xiluodu Hydropower Project. Chinese Journal of Rock Mechanics and Engineering,2006,25(11): 2305-2312. (in Chinese))
[14]肖明. 地下洞室施工开挖三维动态过程数值模拟分析. 岩土工程学报,2000,22(4):421-425.(XIAO Ming. Three-dimensional Numerical Model of Construction Process for Underground Opening. Chinese Journal of Geotechnical Engineering,2000,22(4):421-425. (in Chinese))