本文選題：隧道 + 巖溶　； 參考：《重慶交通大學》2014年碩士論文

【摘要】：巖溶題目是世界性難題，在我國境內(nèi)，可溶性巖分布面積約占國土面積的1/3，我國是世界上巖溶分布面積最為廣泛的國家之一。 廣闊的巖溶分布嚴重影響我國交通事業(yè)的發(fā)展與進步。巖溶常常會導致塌方、突水等現(xiàn)象，不但影響了工期，甚至會導致設備損壞、人員傷亡等嚴重后果。因此如何有效地避免和處理巖溶問題，，已成為隧道施工的關鍵問題所在。 本文結(jié)合貴陽花果園西大街隧道工程實例，在廣泛調(diào)研、參閱國內(nèi)外相關文獻的基礎上，對巖溶隧道圍巖穩(wěn)定性的影響及巖溶處治技術進行研究。主要研究內(nèi)容包括以下幾個方面： ①探究巖溶對隧道工程的影響，及巖溶發(fā)育的一般規(guī)律。 ②對巖溶隧道超前預報技術進行探討及研究。 ③利用MIDAS GTS有限元分析軟件探討分析了不同直徑溶洞在隧道拱頂、側(cè)墻、底部不同部位分布時，隧道內(nèi)部圍巖的位移變形及應力變化特點。揭示了巖溶影響隧道圍巖穩(wěn)定性的根本原因即：巖溶導致圍巖支撐厚度變薄，圍巖在巖溶區(qū)段產(chǎn)生應力集中現(xiàn)象，在強大的局部應力作用下，圍巖產(chǎn)生局部失穩(wěn)。 ④為確保巖溶段隧道施工的安全性、經(jīng)濟性、環(huán)保性三者的平衡，提出了下一階段研究的內(nèi)容和方向。
[Abstract]:Karst problem is a worldwide problem. In China, soluble rock area accounts for about one third of the land area, and China is one of the countries with the most extensive karst distribution area in the world. The wide karst distribution seriously affects the development and progress of China's transportation industry. Karst often leads to collapse, water inrush and other phenomena, which not only affect the duration of the project, but also lead to equipment damage, casualties and other serious consequences. Therefore, how to effectively avoid and deal with karst problems has become a key problem in tunnel construction. In this paper, the influence of the stability of karst tunnel surrounding rock and the karst treatment technology are studied on the basis of extensive investigation and reference to the relevant literature at home and abroad. The main research contents include the following aspects: 1 explore the influence of karst on tunnel engineering and the general law of karst development. 2 the advance prediction technology of karst tunnel is discussed and studied. Using MIDAS GTS finite element analysis software, the characteristics of displacement, deformation and stress change of surrounding rock in tunnel with different diameters distributed in different parts of tunnel arch top, side wall and bottom are discussed and analyzed. It is revealed that the fundamental cause of the influence of karst on the stability of tunnel surrounding rock is that karst causes the thickness of surrounding rock to become thinner, the surrounding rock produces stress concentration phenomenon in karst section, and the surrounding rock produces local instability under the action of strong local stress. In order to ensure the balance of safety, economy and environmental protection of tunnel construction in karst section, the content and direction of the next stage research are put forward.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U452.12

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本文編號：1873402