本文選題：軟巖隧道　切入點：標識系統(tǒng)　出處：《西南交通大學》2014年碩士論文

【摘要】：隨著西部地區(qū)公路交通的大力發(fā)展,在同一地區(qū)將同時涌現(xiàn)大量的公路隧道,給隧道結構的安全營運工作提出了新的挑戰(zhàn)。目前同一區(qū)域內同期修建的隧道數量眾多,若對每座隧道都進行長期健康監(jiān)測,不僅費用昂貴,而且實施難度很大,不具可行性。因此,通過選取該地區(qū)富有代表性的標識工程隧道進行長期健康監(jiān)測及安全評價,對區(qū)內隧道群進行健康狀態(tài)的標識系統(tǒng)研究,具有重要的意義。 本文以同期修建的廣甘高速公路軟巖隧道為工程背景,采用資料調研、理論分析、室內模型試驗、現(xiàn)場長期監(jiān)測等研究手段,對廣甘高速公路軟巖隧道健康監(jiān)測標識系統(tǒng)進行了詳細研究。論文的主要研究內容及成果如下： (1)通過對標識系統(tǒng)區(qū)域軟巖隧道場地環(huán)境和設計與施工情況的調查分析,完成了對標識系統(tǒng)區(qū)域特征的提煉,選取了杜家山隧道作為標識工程。 (2)采用模糊綜合評判方法,構建了公路軟巖隧道結構長期安全性評判模型。辨識了影響結構長期安全性的因素,建立了二級評判指標體系；確定了評判指標的隸屬函數；采用層次分析法確定了評價指標的權重值；提出了公路軟巖隧道長期安全性的Ⅳ級安全基準,基于模型試驗加載破壞的演變規(guī)律劃分了襯砌內力的安全等級；運用模糊綜合評判模型對標識工程隧道結構安全性進行了評價。 (3)根據公路軟巖隧道健康監(jiān)測標識系統(tǒng)的概念與研究路線,建立了公路軟巖隧道健康監(jiān)測網絡系統(tǒng)。通過安裝自行研發(fā)的健康監(jiān)測數據終端,實現(xiàn)了對典型斷面長期監(jiān)測數據的采集與傳輸,用于實時地對隧道結構進行安全評判,并與建立的四級預警制度進行相應的預警、診斷。 (4)基于模糊數學相似優(yōu)先比理論,建立了相似因子集、權重集、目標源樣本集,并對9座非標識工程軟巖隧道劃分了153個待定目標樣本集,從而構建了標識系統(tǒng)區(qū)域公路軟巖隧道模糊數學相似優(yōu)先比模型,實現(xiàn)了對區(qū)域內非標識工程隧道結構健康狀態(tài)的推演。開發(fā)了標識系統(tǒng)區(qū)域公路軟巖隧道結構健康狀態(tài)推演系統(tǒng)軟件,實現(xiàn)了對隧道結構健康狀態(tài)推演全過程的可視化操作。
[Abstract]:With the rapid development of highway traffic in the western region, a large number of highway tunnels will emerge at the same time, which poses a new challenge to the safe operation of tunnel structure.At present, the number of tunnels built in the same region is numerous. If each tunnel is monitored for a long time, it is not only expensive, but also difficult to implement and not feasible.Therefore, it is of great significance to select the representative marking engineering tunnel in this area for long-term health monitoring and safety evaluation, and to study the marking system of the health status of the tunnel group in the area.Based on the soft rock tunnel of Guanggan Expressway built in the same period as engineering background, this paper adopts research methods such as data investigation, theoretical analysis, indoor model test, field long-term monitoring and so on.The health monitoring and marking system of soft rock tunnel in Guanggan Expressway is studied in detail.The main contents and results of this thesis are as follows:1) based on the investigation and analysis of the site environment, design and construction of soft rock tunnel in the marking system area, the extraction of the regional characteristics of the marking system is completed, and the Dujiashan tunnel is selected as the marking project.2) the long term safety evaluation model of highway soft rock tunnel structure is established by using fuzzy comprehensive evaluation method.The factors affecting the long-term safety of the structure are identified, the two-level evaluation index system is established, the membership function of the evaluation index is determined, and the weight value of the evaluation index is determined by the analytic hierarchy process (AHP).The safety standard of grade 鈪，

本文編號：1704546