本文選題：“隧道-滑坡”正交體系 + 機理�。� 參考：《中國鐵道科學研究院》2014年碩士論文

【摘要】：隧道穿越不良地質地段時,滑坡病害常常是一個令工程師們頭疼的問題,如果選線時不可避免的要穿越滑坡,加上人們現(xiàn)階段對滑坡認識的局限性,往往在隧道開挖過程中或者隧道貫通后,隧道襯砌開裂變形、山體開裂蠕動,這時才發(fā)現(xiàn)隧道位于老滑坡不良地質體中,這就需要對病害進行治理。本文針對襄渝線K328+056-K328+579.2趙家塘隧道滑坡這一典型的“隧道-滑坡”正交體系工點為研究對象,通過地質調繪、力學計算、有限元數(shù)值模擬、地質力學模型試驗等多種手段,對此工點的隧道與滑坡的相互作用機理、抗滑樁加固的機理、抗滑樁相關參數(shù)(如抗滑樁與隧道間距、抗滑樁的樁間距等)進行了較為深入的研究,主要研究內容如下： (1)對“隧道-滑坡”正交體系的類型進行了詳細的論述,總結了滑坡地段隧道和滑坡的變形特征、引起隧道和滑坡變形的影響因素以及相應的5種地質力學模型。 (2)針對襄渝線K328+056-K328+579.2趙家塘隧道滑坡這一典型的“隧道-滑坡”正交體系工點,通過地質調繪從地質角度分析了老滑坡復活的原因和隧道變形破壞的原因,從而得出了其相互作用機理。對滑坡的推力進行了天然、暴雨、地震3種工況下的計算,再對隧道支擋前進行了內力計算,得出了隧道受到了明顯的偏壓作用,從隧道受力的角度分析了隧道變形破壞的原因。 (3)通過選用抗滑樁支擋和排水工程綜合治理的方案,對天然工況下的隧道支擋前后進行了受力對比,得出了抗滑樁加固“隧道-滑坡”正交體系的加固機理,并且驗證了埋入式抗滑樁對這種體系具有很好的加固效果。 (4)運用FLAC3D有限元分析軟件對趙家塘滑坡隧道進行了5種工況的模擬分析,得出了合理的樁隧間距和抗滑樁的中-中間距。 (5)進行室內地質力學模型試驗,由“隧道-滑坡”正交體系無支擋、抗滑樁支擋時抗滑樁中-中間距3.5倍樁徑和5倍樁徑3組模型試驗,將坡體表面位移和隧道的內力圖進行了對比分析,認為抗滑樁加固的效果顯著,并且驗證了數(shù)值模擬里面的結果。
[Abstract]:Tunnel adverse geological section, the landslide is often a headache to engineers, if it is inevitable to route through the coast, with people at the present stage of understanding of the limitations of the landslide, often in the process of tunnel excavation or tunnel lining cracks, deformation, mountain cracking peristalsis, then found that the tunnel is located in the old landslide of bad geological body, which is to govern the disease. According to the "tunnel landslide" Xiangfan Chongqing railway K328+056-K328+579.2 Zhao Jia Tang tunnel landslide is a typical system of orthogonal project as the research object, through geological mapping, mechanical calculation, finite element numerical simulation, geomechanical model test and other means in this regard, the interaction mechanism of tunnel and landslide sites, anti slide pile reinforcement mechanism, anti slide pile parameters (such as anti slide pile and tunnel spacing, anti slide pile spacing etc.) A more in-depth study is carried out, and the main contents are as follows:
(1) the types of "tunnel landslide" orthogonal system are discussed in detail, and the deformation characteristics of tunnel and landslide in landslide area are summarized, and the influencing factors of tunnel and landslide deformation and 5 corresponding geomechanical models are also summarized.
(2) for the "tunnel landslide" Xiangfan Chongqing railway K328+056-K328+579.2 Zhao Jia Tang tunnel landslide is a typical orthogonal system by geological mapping by reason of deformation and failure reasons and the old tunnel landslide is analyzed from the angle of geology, thus obtained the interaction mechanism. The landslide thrust is natural, rainstorm. Seismic calculation under 3 working conditions, the tunnel retaining before the internal force calculation, obtained by the obvious effect of bias tunnel from the tunnel, stress analysis of the damage cause of tunnel deformation.
(3) the anti sliding piles and drainage engineering comprehensive management program through selection of natural conditions of the tunnel retaining force before and after comparison, the reinforcement mechanism of "tunnel - anti slide pile landslide" orthogonal system, and verify the Embedded Pile to this system has good reinforcing effect the anti slide type.
(4) Zhao Jia Tang landslide tunnel were simulated and analyzed under 5 different conditions using finite element analysis software FLAC3D, the distance between tunnel and pile spacing of anti slide pile in.
(5) indoor geomechanical model test, the tunnel landslide orthogonal system without retaining piles of retaining piles in the middle - distance of 3.5 times the pile diameter and 5 times of the pile diameter of 3 groups of model tests, the internal force diagram of slope surface displacement and tunnel were analyzed. It is found that the anti slide pile effect, and verify the numerical simulation inside the results.

【學位授予單位】：中國鐵道科學研究院
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U457.3

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本文編號：1760970