丫口寨隧道銑挖爆破工法減震效果研究
發(fā)布時間：2019-06-13 19:42
【摘要】：我國高速鐵路隧道修建正在蓬勃發(fā)展,新的"十三五"規(guī)劃更是將其視為國家投資的重點,且鐵路修建重點開始向中西部地區(qū)轉(zhuǎn)移。鑒于中西部地區(qū)各種復雜地質(zhì)環(huán)境和社會環(huán)境,尤其是喀斯特地貌淺埋富水軟巖情況下,難免遇到各種各樣的難題,而爆破減震問題成為亟待解決的問題。本文以滬昆客專貴州段丫口寨大斷面富水巖溶隧道工程為依托,通過現(xiàn)場調(diào)研、理論分析、現(xiàn)場監(jiān)測、數(shù)值模擬等方法研究銑挖爆破施工技術(shù)在淺埋過民房段、淺埋過明河段隧道施工中的應(yīng)用。主要工作及成果如下:(1)通過理論分析爆破破巖機理,分析了機械銑挖加控制爆破新工法在減震施工中的優(yōu)越性。結(jié)合現(xiàn)場具體工況,分析了銑挖機的參數(shù)選取、銑挖方案設(shè)計、具體施工中工作效率、經(jīng)濟性及適用性問題。(2)通過現(xiàn)場試驗及爆破振動監(jiān)測,研究論證了銑挖爆破工法在淺埋過民房段減震施工情況下的可行性。(3)通過分析目前爆破振動的相關(guān)理論,借助有限元軟件數(shù)值模擬論證了銑挖爆破工法相比于鉆爆法在減震方面的優(yōu)勢。
[Abstract]:The construction of high-speed railway tunnel in China is booming, and the new 13th five-year Plan regards it as the focus of national investment, and the focus of railway construction begins to shift to the central and western regions. In view of the various complex geological and social environments in the central and western regions, especially in the case of shallow water-rich soft rocks in Karst landforms, it is inevitable to encounter various problems, and the problem of blasting shock absorption has become an urgent problem to be solved. Based on the project of Yakouzhai large section rich water Karst tunnel in Guizhou section of Shanghai and Kunming, this paper studies the application of milling and excavation blasting construction technology in the tunnel construction of shallow buried folk section and shallow buried Minghe section through field investigation, theoretical analysis, field monitoring, numerical simulation and so on. The main work and achievements are as follows: (1) through the theoretical analysis of blasting rock breaking mechanism, the advantages of mechanical milling and blasting combined with controlled blasting in shock absorption construction are analyzed. Combined with the specific working conditions of the site, this paper analyzes the parameter selection of the milling and excavation machine, the design of the milling and excavation scheme, and the working efficiency, economy and applicability in the concrete construction. (2) through the field test and blasting vibration monitoring, the feasibility of the milling and excavation blasting method under the condition of shallow blasting vibration absorption construction is studied and demonstrated. (3) by analyzing the relevant theories of blasting vibration at present, With the help of finite element software numerical simulation, the advantages of milling blasting method compared with drilling blasting method in shock absorption are demonstrated.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U455.4
本文編號：2498770
[Abstract]:The construction of high-speed railway tunnel in China is booming, and the new 13th five-year Plan regards it as the focus of national investment, and the focus of railway construction begins to shift to the central and western regions. In view of the various complex geological and social environments in the central and western regions, especially in the case of shallow water-rich soft rocks in Karst landforms, it is inevitable to encounter various problems, and the problem of blasting shock absorption has become an urgent problem to be solved. Based on the project of Yakouzhai large section rich water Karst tunnel in Guizhou section of Shanghai and Kunming, this paper studies the application of milling and excavation blasting construction technology in the tunnel construction of shallow buried folk section and shallow buried Minghe section through field investigation, theoretical analysis, field monitoring, numerical simulation and so on. The main work and achievements are as follows: (1) through the theoretical analysis of blasting rock breaking mechanism, the advantages of mechanical milling and blasting combined with controlled blasting in shock absorption construction are analyzed. Combined with the specific working conditions of the site, this paper analyzes the parameter selection of the milling and excavation machine, the design of the milling and excavation scheme, and the working efficiency, economy and applicability in the concrete construction. (2) through the field test and blasting vibration monitoring, the feasibility of the milling and excavation blasting method under the condition of shallow blasting vibration absorption construction is studied and demonstrated. (3) by analyzing the relevant theories of blasting vibration at present, With the help of finite element software numerical simulation, the advantages of milling blasting method compared with drilling blasting method in shock absorption are demonstrated.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U455.4
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