鄭萬鐵路許良隧道圍巖穩(wěn)定性分析與初支優(yōu)化研究
[Abstract]:At present, the method of evaluating the stability of the surrounding rock of shallow tunnel is often relatively single, the evaluation results will inevitably be partial, which will cause incalculable economic losses in many cases. In this paper, the finite element limit state analysis method and the constraint characteristic curve method are used to evaluate the safety of Xueliang tunnel based on Zheng Wangao Tieshiliang tunnel. At the same time, the safety of Xuliang tunnel is verified in combination with the measured data in the field. On the basis of this, the existing supporting scheme of Xuliang tunnel is optimized, and feasible suggestions and suggestions are put forward. In addition, the anchoring effect of two kinds of anchor methods commonly used in engineering practice is compared and tested. The main results are as follows: (1) within 85m and 320m of entrance section and 320m exit section of Xueliang tunnel, the stability of surrounding rock is poor, and the risk of shear-slip failure exists in the side wall of the tunnel, so precautions and emergency measures should be taken in the construction process. Avoid casualties. (2) the bolting shotcrete steel frame combination supporting method adopted in Xuliang tunnel is on the large side, so it is suggested to adopt the flexible supporting method; (3) the measured data show that the settlement of tunnel arch and the convergence of clearance tend to be stable under the current designed support mode, and the final displacement is within the range required by the code. The strength of the initial support is less than the ultimate strength of the supporting structure after checking and calculating. (4) on the basis of the original designed support method, the net space displacement of the tunnel increases by about 9.0%, the axial force of shotcrete increases by 3.3%, the bending moment increases by 22.9%, and the force of anchor rod increases by 11.6% after canceling the steel frame. It is shown that canceling the steel frame will not affect the safety of Xueliang tunnel under the premise of ensuring the quality of bolt construction. (5) under the premise of existing construction technology, the steel frame will not affect the safety of Xueliang tunnel. (5) under the premise of existing construction technology, the steel frame will not affect the safety of Xueliang tunnel. The anchoring effect of full-length mortar is better than that of cement-based explosive roll. It is suggested that the full-length bonding anchoring of anchor rod in similar engineering should be carried out by mortar.
【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
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 郝杰;;基于UDEC的高度節(jié)理化隧洞圍巖穩(wěn)定性分析[J];紅水河;2016年02期
2 楊小禮;姚聰;張佳華;;Safe retaining pressures for pressurized tunnel face using nonlinear failure criterion and reliability theory[J];Journal of Central South University;2016年03期
3 王一立;范留軍;;傳統(tǒng)懸吊、組合拱理論與松動(dòng)圈理論聯(lián)系差異探究[J];科技視界;2015年24期
4 張德華;劉士海;任少強(qiáng);;隧道噴射混凝土強(qiáng)度增長規(guī)律及硬化速度對(duì)初期支護(hù)性能影響試驗(yàn)研究[J];巖土力學(xué);2015年06期
5 楊小禮;龍澤祥;;Roof collapse of shallow tunnels with limit analysis method[J];Journal of Central South University;2015年05期
6 馬建;孫守增;趙文義;王磊;馬勇;劉輝;張偉偉;陳紅燕;陳磊;魏雅雯;葉飛;;中國隧道工程學(xué)術(shù)研究綜述·2015[J];中國公路學(xué)報(bào);2015年05期
7 畢武;;鋼拱架與格柵鋼架比較與分析[J];公路;2014年09期
8 蘇永華;何新亮;羅正東;;基于強(qiáng)度折減法的隧道圍巖穩(wěn)定性研究[J];水文地質(zhì)工程地質(zhì);2014年01期
9 史俊濤;黃春暉;孔思麗;任琪;;基于容重增加與強(qiáng)度折減法的邊坡穩(wěn)定性對(duì)比分析[J];科學(xué)技術(shù)與工程;2013年35期
10 覃長兵;孫志彬;梁橋;;Limit analysis of roof collapse in tunnels under seepage forces condition with three-dimensional failure mechanism[J];Journal of Central South University;2013年08期
相關(guān)博士學(xué)位論文 前5條
1 張良剛;特大斷面板巖隧道圍巖變形特征及控制技術(shù)研究[D];中國地質(zhì)大學(xué);2014年
2 羅偉;淺埋偏壓隧道穩(wěn)定性分析及其可靠度研究[D];中南大學(xué);2014年
3 文競(jìng)舟;隧道初期支護(hù)力學(xué)分析及參數(shù)優(yōu)化研究[D];重慶大學(xué);2012年
4 衛(wèi)振海;巖土材料結(jié)構(gòu)性問題研究[D];北京交通大學(xué);2012年
5 郭軍;客運(yùn)專線大斷面黃土隧道施工力學(xué)及支護(hù)設(shè)計(jì)理論研究[D];西南交通大學(xué);2008年
相關(guān)碩士學(xué)位論文 前9條
1 王彬;管棚注漿支護(hù)技術(shù)在飽水礫砂層地鐵施工中的應(yīng)用[D];青島理工大學(xué);2015年
2 李岳;大變形隧道長短組合錨桿支護(hù)技術(shù)研究[D];西安科技大學(xué);2012年
3 公銘;數(shù)值方法確定海底隧道巖石覆蓋厚度的判別準(zhǔn)則研究[D];山東大學(xué);2012年
4 徐繼偉;基于綜合法的邊坡穩(wěn)定分析研究[D];西北農(nóng)林科技大學(xué);2010年
5 丁健;地鐵工程建設(shè)應(yīng)急管理評(píng)估研究[D];清華大學(xué);2009年
6 黃林偉;軟巖隧道大變形力學(xué)行為與控制技術(shù)的研究[D];重慶大學(xué);2008年
7 王曉形;淺埋洞室圍巖壓力若干問題研究[D];同濟(jì)大學(xué);2006年
8 從會(huì)濤;隧道動(dòng)態(tài)設(shè)計(jì)方法與實(shí)用技術(shù)研究[D];鐵道部科學(xué)研究院;2004年
9 裘軍良;公路隧道圍巖判別和支護(hù)設(shè)計(jì)人工神經(jīng)元網(wǎng)絡(luò)方法的研究[D];長安大學(xué);2003年
,本文編號(hào):2440731
本文鏈接:http://sikaile.net/kejilunwen/daoluqiaoliang/2440731.html