大型滑坡長期演變的地質(zhì)力學行為及成災模式研究年度報告

蘇立君++蘇志滿++李新坡+++岳宗玉++林鋒

摘 要：該年度投入了大量的人力和物力開展文獻資料總結(jié)和野外調(diào)查工作，初步將西部山區(qū)大型滑坡地質(zhì)結(jié)構(gòu)類型劃分為“弱面”控制型、“關鍵塊體”型、“軟弱基座”型和“采空區(qū)”控制型四大類。將滑坡成災模式劃分為變形體-潛在威脅模式、滑坡-隨動破壞模式、滑坡-高速碎屑流模式、滑坡-堰塞壩堵江模式和滑坡-高涌浪模式等5個模式。完成了對貴州習水縣程寨滑坡、貴州關嶺縣崗烏鎮(zhèn)大寨滑坡和重慶武隆雞尾山滑坡地質(zhì)結(jié)構(gòu)類型及成災模式的詳細調(diào)查分析工作。獲取了滑坡巖土體物性參數(shù)，為后續(xù)研究打下了基礎。在滑坡的啟動和運動機理研究方面，主要完成了模型試驗設備的設計和加工，基于連續(xù)介質(zhì)力學和離散元的滑坡動力過程模擬，針對聲波液化模型在大型滑坡中的應用及滑坡模擬中物質(zhì)狀態(tài)方程的替代問題的研究和采用大型模型槽及離散元方法對大型滑坡產(chǎn)生的碎屑流運動特征的研究等工作。該年度所取得的研究成果有助于加深人們對大型滑坡地質(zhì)結(jié)構(gòu)類型和成災模式的認識和理解，拓寬現(xiàn)有的對大型滑坡啟動和運動的模擬方法，推動大型滑坡成因機理研究向前發(fā)展。

關鍵詞：大型滑坡 地質(zhì)結(jié)構(gòu) 物理模型試驗 數(shù)值模擬

Abstract： Large amount of man power and resourses were used to carry out literature review and site investigation， this year. The characteristics of large scale landslides in west China were preliminarily divided to four groups， which are weak interface controled， key block controled， weak foundation controled and goaf controled landslides， respectively. The disaster modes of large scale landslides were divided into five types， including deformation body-potential threats mode， landslide-follow-up damage mode， landslide-high speed dry debris folw mode， landslide-dammed lake mode and landslide-surge mode. Detail investigation and analyses were conducted on types of geological structure and disater modes of Gui zhou Xi shui landslide， Gui zhou Guan ling landslide and Chong qing Wu long Ji wei shan landslide. The physical and mechanical parameters of rock and soil mass of the landslides were obtained for future research. Facilities for physical modeling of landslides were designed and manufactured. Numerical simulation of landslides based on continuum mechanics and discrete elements were conducted. The application of Acoustic liquefaction model and principle of equation of state substitution in simulation of landslides were also carried out. Large scale flume tests of dry debris flow were simulated by discontinuous deformation analysis method. The achievement we obtained this year will enhance our knowledge and understanding of the characteristics of geological structure and disaster modes for large scale landslides， broaden numerical simulations methods for the iniation and movement of large scale landslides and push the development of research on mechanism of large scale lnadslides. One SCI paper that was supported by this project was published and four more papers were submitted to international journals.

Key Words： Large landslides； Geological structure； Physical model tests； Numerical simulation

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