本文關鍵詞： 碎裂巖體 坡體結構 邊界條件 變形破壞模式 離散元　出處：《工程地質(zhì)學報》2017年02期 　論文類型：期刊論文

【摘要】：碎裂結構巖質(zhì)邊坡是地質(zhì)工程中遇到的一種最不穩(wěn)定邊坡,其原巖松弛,結構面普遍張開,圍巖自穩(wěn)能力差,碎裂結構巖體出露不連續(xù),空間分布存在差異,導致邊坡破壞邊界不明顯,變形破壞機制很難確定。本文以雅礱江楞古水電站碎裂結構巖質(zhì)邊坡為例,在地質(zhì)環(huán)境調(diào)查和平硐勘測的基礎上,系統(tǒng)研究了碎裂巖體結構特征,分析了控制邊坡變形破壞的邊界條件和變形破壞模式,并運用UDEC離散元程序模擬驗證。研究結果表明:碎裂巖質(zhì)邊坡的變形破壞主要受自身結構及內(nèi)部相對長大結構面控制,變形演化過程依循應力調(diào)整、時效變形和局部失穩(wěn)3個階段,變形破壞模式分為斷層主控底滑型和裂隙切割破壞型。目前針對碎裂結構巖質(zhì)邊坡研究相對較少,缺乏大型工程實例支撐,該研究成果為水利工程中這類邊坡的研究提供了參考。
[Abstract]:Cataclastic rock slope is one of the most unstable slopes encountered in geological engineering. Its original rock is relaxed, the structural plane is generally open, the self-stability of surrounding rock is poor, the fractured rock mass is discontinuous, and the spatial distribution is different. The boundary of slope failure is not obvious, and the mechanism of deformation and failure is difficult to determine. This paper takes the cracked rock slope of Lungu Hydropower Station in Yalong River as an example, based on the investigation of geological environment and the investigation of tunnel. The structural characteristics of fractured rock mass are systematically studied, and the boundary conditions and deformation failure modes controlling the deformation and failure of slope are analyzed. The results show that the deformation and failure of the fractured rock slope are mainly controlled by its own structure and the internal relative long structure plane, and the deformation evolution process follows stress adjustment. In the three stages of aging deformation and local instability, the deformation and failure modes can be divided into two types: the main fault-controlled bottom slip type and the fracture cutting failure type. At present, there are relatively few researches on the rock slope with broken structure, which is short of the support of large engineering examples. The research results provide a reference for the study of this kind of slope in hydraulic engineering.
【作者單位】： 地質(zhì)災害防治與地質(zhì)環(huán)境保護國家重點實驗室(成都理工大學);中國電建集團成都勘測設計研究院有限公司;
【基金】：國家自然科學基金(41572302) 四川省國土資源廳科學研究計劃(KJ-2015-18)資助
【分類號】：TV223.3
【正文快照】： DEFORMATION FAILURE MODE OF FRACTURED ROCK MASS SLOPEIN LENGGU HYDROPOWER STATIONZHANG Yuyang(1)HUANG Runqiu(1)PEI Xiangjun(1)WEI Yufeng(1)WANG Zilong(1)WANG Gang(2)XIAO Huabo(2)((1)State Key Laboratory of Geohazard Prevention and Geoenvironment Protecti

【相似文獻】

相關會議論文 前1條

1 余波;陳占恒;;西藏瀾滄江河谷岸坡風化碎裂巖體特征及影響[A];中國水力發(fā)電工程學會地質(zhì)及勘探專業(yè)委員會中國水利電力物探科技信息網(wǎng)2012年學術年會論文集[C];2012年

，

本文編號：1467235