本文選題：102隧道 + 超前地質預報��； 參考：《重慶交通大學》2014年碩士論文

【摘要】：隨著我國國民經濟和社會的高速發(fā)展，國家基礎設施建設不斷擴大，隧道及地下工程大量涌現，但隧道在建設和運營中各種工程事故也不斷發(fā)生，尤其在施工階段，由于隧道及地下工程開挖具有很強隱蔽性，而且山體內地質情況由于不易控制，稍有不慎便會造成重大事故，給國家造成重大損失。因此，論文針對川藏公路102隧道超前地質預報與開挖方法展開研究，在收集整理該工程區(qū)域的地質資料與該工程設計資料的基礎上，通過分析該工程的地質特點與該地區(qū)類似工程經驗，選擇適合本工程的超前地質預報方法，，對隧道進行超前地質預報，以補充初期勘探資料不能滿足隧道施工的要求。另外對本工程采用的開挖方法進行施工階段的數值模擬分析，以期對隧道所穿越的軟弱圍巖進行施工方案的優(yōu)化，為現場施工提供參考和指導。 論文依托工程為川藏公路102隧道，102隧道地處102大滑坡群，地質條件復雜，隧道穿越多個斷層破碎帶。為了保證隧道安全快速施工，論文主要開展了以下工作： ①在調查該區(qū)域的地質情況、收集整理102隧道區(qū)域的工程地質資料、詳細閱讀該工程的設計文件的基礎上，并結合該區(qū)域類似工程的經驗和超前地預報方法的優(yōu)缺點，選擇適合本工程的超前地質預報方法。 ②詳細探討了地質雷達的基本原理和優(yōu)缺點，分析了地質雷達在預報過程中相關參數的選取和測線的布置。并通過地質雷達超前預報在102隧道中的應用，總結了地質雷達圖像與不良地質之間的對應關系。即地質雷達圖像對不良地質的反射波特征。 ③采用有限元軟件，分析隧道穿越不同圍巖級別時，圍巖的變形特征。并通過分析開挖面與圍巖分界面不同距離時的拱頂位移變化規(guī)律，認為利用監(jiān)控量測數據進行超前地質預報是可行的。 ④結合川藏公路102隧道的開挖方法和工程地質環(huán)境，對102隧道所采用的兩臺階法施工進行優(yōu)化研究，確定隧道在Ⅳ、Ⅴ級圍巖段施工過程中上臺階合理開挖高度與上下臺階之間合理間距，為現場快速施工提供指導。
[Abstract]:With the rapid development of China's national economy and society, the construction of national infrastructure has been expanding, and tunnels and underground projects have sprung up in large numbers. However, various engineering accidents also occur in the construction and operation of tunnels, especially in the construction stage. Because of the strong concealment of the excavation of tunnels and underground works, and because the geological conditions in the mountains are not easy to control, a slight carelessness will cause serious accidents and cause great losses to the country. Therefore, based on the geological prediction and excavation method of tunnel 102 of Sichuan-Tibet Highway, this paper collects and arranges the geological data of the project area and the design data of the project. By analyzing the geological characteristics of the project and the similar engineering experience in this area, the authors select the advanced geological forecast method suitable for the project, and carry out the advance geological forecast for the tunnel, so that the initial exploration data can not meet the requirements of tunnel construction. In addition, the excavation method adopted in this project is simulated and analyzed in the construction stage, in order to optimize the construction scheme of the soft surrounding rock through which the tunnel passes, and to provide reference and guidance for the field construction. The paper relies on the project for tunnel 102 of Chuanzang Highway, which is located in 102 large landslide group. The geological conditions are complex, and the tunnel passes through several fault broken zones. In order to ensure the safe and rapid construction of the tunnel, the thesis mainly carried out the following work: 1 on the basis of investigating the geological situation of the area, collecting and arranging the engineering geological data of the 102 tunnel area, reading the design documents of the project in detail, and combining the experience of similar projects in this area and the advantages and disadvantages of the advanced prediction method, The advanced geological prediction method suitable for this project is selected. (2) the basic principle, advantages and disadvantages of GPR are discussed in detail, and the selection of relevant parameters and the layout of measuring lines in the process of GPR prediction are analyzed. Through the application of GPR in tunnel 102, the relationship between GPR image and bad geology is summarized. That is, the reflection wave characteristics of geological radar image to bad geology. Using finite element software, the deformation characteristics of surrounding rock when tunnel passes through different surrounding rock levels are analyzed. By analyzing the variation law of arch displacement at different distances between excavated surface and surrounding rock, it is considered that it is feasible to use monitoring data to carry out geological prediction ahead of time. 4 combined with the excavation method and engineering geological environment of tunnel 102 of Chuan-Tibet Highway, the optimization of the construction of tunnel 102 by two step methods is carried out, and the tunnel in 鈪

本文編號：1810972