【摘要】：近年來,隨著我國經(jīng)濟(jì)水平和綜合國力的提升,國內(nèi)基礎(chǔ)設(shè)施建設(shè)得到了迅速的發(fā)展,大批長(zhǎng)大隧道在地質(zhì)條件復(fù)雜的西部山嶺地區(qū)修建。由于大部分山嶺地區(qū)地質(zhì)條件復(fù)雜多變,隧道修建過程常常會(huì)碰到強(qiáng)度低、自穩(wěn)能力差的軟弱圍巖或破碎帶,施工時(shí)常常由于開挖方法、支護(hù)參數(shù)或施工管理不當(dāng)而造成塌方冒頂、圍巖大變形或支護(hù)結(jié)構(gòu)失穩(wěn),致使工期延后和投資增加。因此,系統(tǒng)研究分析遇到的軟弱圍巖類型、變形特征對(duì)合理選擇施工方案至關(guān)重要。本論文依托云桂鐵路小寨隧道工程,在分析小寨隧道軟弱圍巖特點(diǎn)的基礎(chǔ)上,提出了適合軟弱圍巖施工的四個(gè)方案,并從施工安全、質(zhì)量、費(fèi)用、難易程度及施工進(jìn)度5個(gè)角度對(duì)四種方案進(jìn)行了比較；最后運(yùn)用層次分析法建立數(shù)學(xué)模型,定量評(píng)價(jià)了四種方案的合理性,從而確定了該軟弱圍巖段最佳施工方案為三臺(tái)階七步法。
[Abstract]:In recent years, with the improvement of China's economic level and comprehensive national strength, the construction of domestic infrastructure has been rapidly developed. A large number of long and large tunnels have been built in the mountainous region of the western part of China with complex geological conditions. Because the geological conditions in most mountain areas are complex and changeable, the tunnel construction process will often encounter weak surrounding rock or broken zone with low strength and poor self-stabilization ability, and often due to excavation method during construction. Improper support parameters or construction management lead to collapse and roof fall, large deformation of surrounding rock or instability of support structure, resulting in delay of construction period and increase of investment. Therefore, it is very important to study and analyze the types of weak surrounding rock and the deformation characteristics in order to select the construction scheme reasonably. Based on the analysis of the characteristics of weak surrounding rock in Xiaozhai Tunnel of Yungui Railway, this paper puts forward four schemes suitable for the construction of weak surrounding rock, and from the aspects of construction safety, quality and cost, the paper puts forward four schemes for the construction of weak surrounding rock. The difficulty degree and construction schedule are compared with each other from five angles. Finally, the mathematical model is established by the analytic hierarchy process (AHP), and the rationality of the four schemes is quantitatively evaluated, thus the optimum construction scheme for the weak surrounding rock is determined to be three steps and seven steps.
【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】：2015
【分類號(hào)】：U455.49

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