| 拉西瓦水电站地下厂房洞室群分层开挖过程仿真反演分析 |
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| 引用本文： | 姚显春,李宁,陈莉静,孙宏超,景茂贵. 拉西瓦水电站地下厂房洞室群分层开挖过程仿真反演分析[J]. 岩石力学与工程学报, 2011, 30(Z1): 3052-3059 |
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| 作者姓名： | 姚显春 李宁 陈莉静 孙宏超 景茂贵 |
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| 作者单位： | (1. 西安理工大学 岩土工程研究所，陕西 西安 710048；2. 中国科学院寒区旱区环境与工程研究所 冻土工程国家重点实验室，甘肃 兰州 730000；;3. 中国东方电气集团有限公司，四川 成都 611731；4. 中国三峡集团公司，湖北 宜昌 443002) |
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| 基金项目： | 国家自然基金资助项目(50879068),国家自然基金创新群体(40821001); 西安理工大学校基金(106-211010) |
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| 摘 要： | 拉西瓦水电站厂房规模巨大，围岩主要为脆硬花岗岩，爆破后围岩分区明显；同时厂房区域山高坡陡，河谷狭窄，区域地应力场较高，且分布较复杂，对洞室稳定性不利。为了评判开挖后地下厂房围岩的稳定性及支护的长期安全性，以地下厂房分层开挖现场实测位移为基础，根据多点位移计实测的离洞壁不同深度位移的变化规律将厂房洞壁周边围岩分为松动区、过渡区和稳定区；然后采用每层开挖引起的增量实测位移与相应的反分析位移均方差作为目标函数，分层进行围岩力学参数反演分析，得到上、下游厂房不同的地应力参数及地下厂房在开挖每层时围岩的岩体力学参数。结合反演得到的这些地应力场与围岩力学参数，对后续开挖时厂房围岩稳定性进行评价与预测，提出拉西瓦地下厂房围岩稳定性判定标准。该标准为后续地下厂房监测变形控制提供依据，有效地指导厂房支护设计与开挖施工。
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| 关 键 词： | 岩石力学地下洞室群高地应力围岩稳定性反馈分析拉西瓦水电站 |
| 收稿时间： | 2010-05-10; |
BACK ANALYSIS OF SURROUNDING ROCK STABILITY BASED ON EXCAVATION PROCESS OF UNDERGROUND POWERHOUSE AT LAXIWA HYDROPOWER STATION |
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| YAO Xianchun,LI Ning,,CHEN Lijing,SUN Hongchao,JING Maogui. BACK ANALYSIS OF SURROUNDING ROCK STABILITY BASED ON EXCAVATION PROCESS OF UNDERGROUND POWERHOUSE AT LAXIWA HYDROPOWER STATION[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(Z1): 3052-3059 |
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| Authors: | YAO Xianchun LI Ning CHEN Lijing SUN Hongchao JING Maogui |
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| Affiliation: | (1. Institute of Getechnical Engineering，Xi?an University of Technology，Xi?an，Shaanxi 710048，China；2. State Key Laboratory of Frozen Soil Engineering，Cold and Arid Regions Environmental and Engineering Research Institute，Chinese Academy of Sciences，Lanzhou，Gansu 730000，China；3. Dongfang Electric Corporation，Chengdu，Sichuan 611731，China；4. China Three Gorges Corporation，Yichang，Hubei 443002，China) |
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| Abstract: | The excavation size of Laxiwa underground powerhouse is huge;and its surrounding rock is mainly brittle hard granite rock.Moreover,the mountains are high;the slopes are steep;and the valleys areas are narrow in the area plant.Except that,the regional stress field values are high and the high stress fields distributions are complex,which are extremely detrimental to the stability of the cavern.In order to estimate the stability of surrounding rock and supporting long-term safety of underground plant after ex... |
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| Keywords: | rock mechanics underground caverns high ground stress surrounding rock stability back analysis Laxiwa hydropower station |
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