本文選題：隧道穩(wěn)定性 + 節(jié)理巖體　； 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：以"一帶一路"為契機(jī),長大深埋隧道將會(huì)迎來一股嶄新的建設(shè)高潮,我國也將更加重視對(duì)地下空間的利用,修建隧道所遇到的環(huán)境將復(fù)雜多變,隧道穿越節(jié)理巖體地層將不可避免,而如何采取有效的措施來維持節(jié)理隧道的穩(wěn)定性,保證施工的安全性將是隧道建設(shè)的一大瓶頸。本文基于三維離散元的方法,針對(duì)隧道穿越復(fù)雜節(jié)理巖體地層,并運(yùn)用正交試驗(yàn)的方法,分析節(jié)理巖體各參數(shù)對(duì)圍巖穩(wěn)定性影響的問題。根據(jù)單因素敏感分析的方法,研究噴錨支護(hù)參數(shù)對(duì)節(jié)理隧道的支護(hù)效果,提出不同節(jié)理隧道所適用的噴錨支護(hù)參數(shù)。以實(shí)際工程背景為依托,利用統(tǒng)一強(qiáng)度理論,驗(yàn)證隧道襯砌的安全系數(shù),以保證隧道施工的安全性要求,主要的研究成果如下。1.確定剪切滑移區(qū)面積作為節(jié)理隧道穩(wěn)定性的判定指標(biāo),利用正交試驗(yàn)基本原理,確定正交試驗(yàn)的水平,給出合適的正交表�；谌S離散元的方法,建立層及交叉狀節(jié)理隧道模型,分析巖塊力學(xué)性質(zhì)、節(jié)理力學(xué)性質(zhì)和節(jié)理巖體綜合性質(zhì)對(duì)圍巖穩(wěn)定性的影響,得到影響節(jié)理隧道穩(wěn)定性的主要因素。2.建立層狀及交叉狀節(jié)理隧道噴錨支護(hù)結(jié)構(gòu)模型,根據(jù)單因素敏感分析的方法,分別研究了噴射混凝土支護(hù)、錨桿支護(hù)及噴錨支護(hù)作用下,支護(hù)參數(shù)對(duì)節(jié)理隧道穩(wěn)定性的影響,得到節(jié)理隧道穩(wěn)定性控制指標(biāo)隨支護(hù)參數(shù)的變化規(guī)律。3.以營盤山隧道為依托工程,針對(duì)層狀、塊狀及破碎狀節(jié)理隧道,提出合理的噴錨支護(hù)參數(shù)�；诮y(tǒng)一強(qiáng)度理論,將襯砌的安全系數(shù)作為評(píng)價(jià)指標(biāo),分析不同節(jié)理隧道噴錨支護(hù)的襯砌受力狀態(tài),得到保證節(jié)理隧道施工安全性的支護(hù)參數(shù)。
[Abstract]:Taking "Belt and Road" as an opportunity, a new construction climax will be ushered in in the long and deep buried tunnel. China will also pay more attention to the utilization of underground space, and the environment encountered in the construction of the tunnel will be complex and changeable. It is inevitable that the tunnel passes through the jointed rock mass strata, and how to take effective measures to maintain the stability of the jointed tunnel and ensure the safety of construction will be a major bottleneck of tunnel construction. In this paper, based on the method of three dimensional discrete element, the influence of the parameters of jointed rock mass on the stability of surrounding rock mass is analyzed by orthogonal test for tunnel crossing through complex jointed rock mass strata. According to the method of single factor sensitivity analysis, the support effect of shotcrete anchor support parameters on jointed tunnel is studied, and the suitable shotcrete anchor support parameters for different joint tunnels are put forward. Based on the actual engineering background and using the unified strength theory, the safety factor of tunnel lining is verified to ensure the safety requirements of tunnel construction. The main research results are as follows. The area of shear slip zone is determined as the criterion of the stability of jointed tunnel. The level of orthogonal test is determined by using the basic principle of orthogonal test and the proper orthogonal table is given. Based on the method of three dimensional discrete element, the model of stratum and cross joint tunnel is established, and the influence of mechanical property of rock block, mechanical property of joint and comprehensive property of jointed rock mass on the stability of surrounding rock is analyzed, and the main factors affecting the stability of jointed tunnel are obtained. Based on the single factor sensitive analysis method, the effects of shotcrete support, bolt support and shotcreting anchor support on the stability of jointed tunnel are studied. The variation law of stability control index with supporting parameters is obtained. Based on Yingpanshan tunnel, the reasonable parameters of shotcrete anchor support are put forward for layered, massive and broken joint tunnels. Based on the unified strength theory, the safety factor of lining is taken as the evaluation index, and the stress state of jet-anchor lining in different joint tunnels is analyzed, and the supporting parameters to ensure the safety of jointed tunnel construction are obtained.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U451.2;U455.4

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