本文選題：大跨淺埋　切入點(diǎn)：控制爆破　出處：《重慶交通大學(xué)》2015年碩士論文

【摘要】：重慶地處西部山區(qū),巖質(zhì)較為堅(jiān)硬,隧道可采用傳統(tǒng)礦山法、盾構(gòu)和TBM等方法進(jìn)行施工。在主城區(qū)若采用傳統(tǒng)礦山法施工,盡管施工效率較高,但是對(duì)鄰近建筑和周邊市民的日常生活會(huì)帶來(lái)較大影響,不利于和諧社會(huì)的建設(shè)。因此,在盡可能降低城市隧道在建設(shè)過(guò)程中對(duì)周邊市民日常生活產(chǎn)生影響的前提下,開(kāi)展城市隧道的施工工法研究可以有效降低建設(shè)成本、縮短建設(shè)周期,具有廣闊的應(yīng)用前景和較好的推廣價(jià)值。本文以重慶市地鐵6號(hào)線(xiàn)正線(xiàn)終點(diǎn)站五路口車(chē)站為依托工程開(kāi)展工法研究,提出應(yīng)用了大跨淺埋車(chē)站隧道爆破安全控制技術(shù),在此基礎(chǔ)上借助現(xiàn)場(chǎng)爆破振動(dòng)監(jiān)測(cè)和數(shù)值模擬分析的方法對(duì)車(chē)站在爆破開(kāi)挖條件下圍巖及既有鄰近建筑進(jìn)行爆破振動(dòng)動(dòng)力響應(yīng)分析;通過(guò)現(xiàn)場(chǎng)監(jiān)測(cè)結(jié)果和數(shù)值模擬結(jié)果對(duì)比,分析評(píng)價(jià)了減震效果,提出適合本項(xiàng)目的合理爆破參數(shù)。本文主要研究?jī)?nèi)容和成果如下:①通過(guò)對(duì)大跨淺埋暗挖隧道爆破安全控制技術(shù)進(jìn)行研究,總結(jié)了適用于復(fù)雜城市環(huán)境條件隧道爆破施工的方法、參數(shù),在此基礎(chǔ)上總結(jié)了爆破效果評(píng)價(jià)的方法和包括爆破振動(dòng)監(jiān)測(cè)與數(shù)值模擬技術(shù)在內(nèi)的爆破減震技術(shù),并總結(jié)提出了大跨淺埋地鐵車(chē)站的控制爆破減震技術(shù)。②在結(jié)構(gòu)動(dòng)力計(jì)算分析研究的基礎(chǔ)上,結(jié)合五路口車(chē)站的工程概況和實(shí)際施工過(guò)程中所采用的新工法,對(duì)計(jì)算模型進(jìn)行分析,選定爆破參數(shù)和確定爆破荷載的加載方式,并選定數(shù)值分析的模擬工況,提出了適合本項(xiàng)目數(shù)值模擬的方法。③對(duì)數(shù)值模擬結(jié)果進(jìn)行分析,得出爆破開(kāi)挖時(shí)的圍巖位移變化特征和地表質(zhì)點(diǎn)的動(dòng)力響應(yīng)規(guī)律;通過(guò)不同開(kāi)挖步的分別模擬分析,得出不同開(kāi)挖步序工況下地表建筑物的動(dòng)力響應(yīng)規(guī)律;將現(xiàn)場(chǎng)監(jiān)測(cè)結(jié)果與數(shù)值模擬結(jié)果進(jìn)行比對(duì)分析,提出爆破參數(shù)優(yōu)化的方法。④對(duì)淺埋暗挖地鐵車(chē)站施工過(guò)程中的的爆破減震效果進(jìn)行分析與評(píng)價(jià),結(jié)合現(xiàn)場(chǎng)爆破振動(dòng)監(jiān)測(cè)成果對(duì)爆破參數(shù)進(jìn)行優(yōu)化,得到了合理和優(yōu)化的爆破參數(shù),指導(dǎo)了工程實(shí)踐并為其他類(lèi)似工程提供了參考。
[Abstract]:Chongqing is located in the western mountainous area, and its rock is hard. The tunnel can be constructed by traditional mining method, shield tunneling and TBM.If the traditional mining method is used in the main urban area, although the construction efficiency is high, it will have a great impact on the neighboring buildings and the daily life of the surrounding citizens, which is not conducive to the construction of a harmonious society.Therefore, on the premise of minimizing the influence of urban tunnel construction on the daily life of the surrounding citizens, the research on the construction method of urban tunnel can effectively reduce the construction cost and shorten the construction period.It has broad application prospect and good promotion value.In this paper, based on the engineering research of five junctions of Chongqing Metro Line 6 main Line Terminal Station, the blasting safety control technology of long span shallow buried station tunnel is put forward.On this basis, the dynamic response of blasting vibration of surrounding rock and existing adjacent buildings under blasting excavation condition is analyzed by means of on-site blasting vibration monitoring and numerical simulation analysis, and the results of field monitoring and numerical simulation are compared.The shock absorption effect is analyzed and evaluated, and the reasonable blasting parameters suitable for the project are put forward.The main contents and results of this paper are as follows: 1. By studying the blasting safety control technology of large-span and shallow-buried tunnels, this paper summarizes the methods and parameters suitable for the blasting construction of tunnels under complex urban environmental conditions.On this basis, the methods of blasting effect evaluation and blasting vibration mitigation techniques including blasting vibration monitoring and numerical simulation are summarized.On the basis of structural dynamic calculation and analysis, the paper summarizes and puts forward the shock absorber technology of controlled blasting for long span and shallow buried subway station. On the basis of structural dynamic calculation and analysis, combined with the general engineering situation of the station at the five junctions and the new construction method adopted in the actual construction process,The calculation model is analyzed, the blasting parameters and loading mode of blasting load are determined, and the simulation conditions of numerical analysis are selected, and the numerical simulation method. 3 is put forward to analyze the numerical simulation results.The variation characteristics of surrounding rock displacement and the dynamic response law of ground mass during blasting excavation are obtained, and the dynamic response laws of surface buildings under different excavation sequence are obtained by simulation and analysis of different excavation steps.The field monitoring results and numerical simulation results are compared and analyzed, and the method of blasting parameter optimization is put forward. 4. The blasting damping effect in the construction process of shallow underground excavation subway station is analyzed and evaluated.The blasting parameters are optimized in combination with the results of on-site blasting vibration monitoring, and the reasonable and optimized blasting parameters are obtained, which guide the engineering practice and provide a reference for other similar projects.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U231.3;U455.6

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