本文選題：地下工程 + 地下廠房洞室群��； 參考：《巖石力學與工程學報》2014年11期

【摘要】：猴子巖水電站地下廠房洞室群具有高地應力、低強度應力比的特點,在施工過程中出現(xiàn)嚴重的變形破壞現(xiàn)象。結(jié)合地質(zhì)、監(jiān)測、檢測及施工資料對施工期圍巖的變形與破壞特征進行分析,分析結(jié)果表明:主廠房、主變室及尾調(diào)室圍巖位移大于50 mm的測點分別占17.2%,27.3%和9.4%,三大洞室圍巖變形處于較大水平,遠超其他電站同期水平。最大位移出現(xiàn)在III1類圍巖處,表明高地應力條件下,較完整硬巖產(chǎn)生的卸荷回彈變形較大,巖石本身破壞產(chǎn)生的變形所占比重增加。圍巖變形深度為5~15 m,最大可達23 m,相對較大;圍巖變形與開挖卸荷關(guān)系密切,呈"階躍式"發(fā)展。圍巖變形破壞以應力重分布起主導作用的應力驅(qū)動型為主,由結(jié)構(gòu)面不利組合控制的重力驅(qū)動型不再占主導地位。研究猴子巖地下廠房洞室群圍巖變形破壞機制對其施工及運營安全具有重要的工程意義。
[Abstract]:The cavern group of underground powerhouse of Monaoyan Hydropower Station is characterized by high in-situ stress and low strength stress ratio, which leads to serious deformation and failure during construction. Combined with geological, monitoring, detection and construction data, the deformation and failure characteristics of surrounding rock during construction period are analyzed. The results show that: main workshop, The displacement of surrounding rock in the main transformer chamber and the tail chamber is greater than 50 mm, accounting for 27.3% and 9.4%, respectively. The surrounding rock deformation of the three caverns is at a relatively high level, which is far higher than the corresponding level of other power stations. The maximum displacement occurs in the surrounding rock of III1, which indicates that under the condition of high in-situ stress, the unloading springback deformation caused by the intact hard rock is larger, and the proportion of the deformation caused by the failure of the rock itself is increased. The deformation depth of surrounding rock is 5 ~ 15 m, and the maximum is 23 m, which is relatively large, and the deformation of surrounding rock is closely related to excavating and unloading, and it develops in a "step" style. The deformation and failure of surrounding rock is dominated by stress-driven type which plays a leading role in stress redistribution, but the gravity driving type controlled by unfavorable combination of structural plane is no longer dominant. It is of great engineering significance to study the surrounding rock deformation and failure mechanism of the cavern group of monkey rock underground powerhouse for its construction and operation safety.
【作者單位】： 中國地質(zhì)大學巖土鉆掘與防護教育部工程研究中心;昆明理工大學電力工程學院;中國電建集團成都勘測設計研究院有限公司;
【基金】：中國電建集團公司科研項目(P099) 國家自然科學基金資助項目(41472263)
【分類號】：TV223;TV731.6

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