本文選題：隧道 + 邊仰坡�。� 參考：《西安建筑科技大學(xué)》2015年碩士論文

【摘要】：隧道洞口邊、仰坡常處于工程地質(zhì)條件較差的地段,常伴有高邊坡、大偏壓埋深淺等不利因素,導(dǎo)致其在開挖后自穩(wěn)能力較差,同時又受到隧道施工的影響,坡體易發(fā)生滑移破壞,對施工人員安全造成威脅并影響隧道工程的進行。因此隧道如何順利安全進洞往往是隧道工程中的難點,而要保證隧道順利安全進洞就要保證隧道洞口邊、仰坡的穩(wěn)定和隧道洞身的穩(wěn)定,因此針對隧道施工過程中洞口邊仰坡穩(wěn)定性和洞身穩(wěn)定性及二者之間的相互影響的研究就顯得十分重要。本文以麻竹高速香山隧道為工程背景,通過數(shù)值模擬和現(xiàn)場監(jiān)測數(shù)據(jù)對上述問題進行了研究和探討,研究成果如下：根據(jù)隧址地質(zhì)條件、地形地貌建立隧道洞口三維有限元模型,分析了隧道洞口邊、仰坡在其開挖和隧道開挖過程中的位移、應(yīng)力、應(yīng)變變化趨勢,總結(jié)了洞口邊、仰坡位移場、應(yīng)力場變化規(guī)律,給出了潛在滑移面位置,在此基礎(chǔ)上提出了洞口邊、仰坡優(yōu)化治理方案。針對坡積土淺埋偏壓隧道,分析了進洞工藝對隧道變形和洞口邊仰坡變形的影響機理,研究了進洞工藝對洞身穩(wěn)定性和洞口邊仰坡穩(wěn)定性的影響規(guī)律,對不同開挖工藝的優(yōu)勢與缺陷做了比較研究,總結(jié)了不同進洞工藝各自所適宜的地質(zhì)條件和工程條件,同時總結(jié)了采用每種開挖工藝時所需要注意的問題,為隧道進洞采用合理的開挖工藝提供理論依據(jù)。通過分析現(xiàn)場監(jiān)測數(shù)據(jù),對隧道洞口段邊、仰坡和洞內(nèi)穩(wěn)定性進行評價,總結(jié)其位移變化規(guī)律。證明了優(yōu)化方案的合理性。同時通過對同斷面實測數(shù)據(jù)和模擬數(shù)據(jù)相對比,總結(jié)其產(chǎn)生異同的原因,為更準確的解釋數(shù)值模擬數(shù)據(jù)提供依據(jù)。
[Abstract]:At the edge of the tunnel entrance, the vertical slope is often located in the section with poor engineering geological conditions, often accompanied by high slope, large partial pressure buried depth and other adverse factors, resulting in its poor self-stability after excavation, and at the same time affected by the tunnel construction. Slippage is easy to occur in the slope, which threatens the safety of the constructors and affects the tunnel project. Therefore, how to enter the tunnel safely is often a difficult point in the tunnel engineering. However, to ensure the safe entry of the tunnel, it is necessary to ensure the stability of the side of the tunnel entrance, the stability of the vertical slope and the stability of the tunnel body. Therefore, it is very important to study the stability of the slope and the stability of the tunnel body and the interaction between them during the tunnel construction. In this paper, the problems mentioned above are studied and discussed by numerical simulation and field monitoring data. The research results are as follows: according to the geological conditions of the tunnel, The 3D finite element model of tunnel entrance is established by terrain and geomorphology. The variation trend of displacement, stress and strain in the excavation and excavation process of tunnel entrance and slope are analyzed, and the variation law of displacement field and stress field of tunnel entrance edge, vertical slope and stress field are summarized. The position of potential slip plane is given, and the optimal control scheme of hole edge and upside-slope is put forward on the basis of it. Aiming at the shallow buried bias pressure tunnel with sloping soil, the influence mechanism of the tunnel entry technology on the tunnel deformation and the slope deformation at the entrance of the tunnel is analyzed, and the influence law of the entry technology on the stability of the tunnel body and the slope of the side slope of the hole is studied. This paper makes a comparative study on the advantages and disadvantages of different excavation techniques, summarizes the geological conditions and engineering conditions suitable for different tunneling processes, and summarizes the problems to be paid attention to when adopting each kind of excavation technology. It provides a theoretical basis for the use of reasonable excavation technology in tunnel entry. Based on the analysis of monitoring data, the stability of tunnel orifice, vertical slope and tunnel is evaluated, and its displacement variation law is summarized. The rationality of the optimization scheme is proved. At the same time, by comparing the measured data of the same section with the simulated data, the causes of their similarities and differences are summarized, which provides the basis for more accurate interpretation of the numerical simulation data.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U455.4

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