區(qū)間隧道下穿大型建筑物技術(shù)措施與風(fēng)險(xiǎn)控制
發(fā)布時(shí)間：2018-09-02 07:14
【摘要】：目前我國城市化進(jìn)程正在快速發(fā)展,城市人口密度越來越大,城市正在變得愈加擁擠。為緩解交通壓力,各大中城市掀起了建設(shè)城市軌道交通的熱潮。在硬質(zhì)巖層中修建地鐵工程,其施工方法及特點(diǎn)明顯區(qū)別于北京、上海、深圳等城市施工技術(shù)相對(duì)成熟的軟弱地層。在進(jìn)行本工程施工時(shí),需要采取爆破作業(yè),而爆破振動(dòng)對(duì)周邊建(構(gòu))筑物有可能造成嚴(yán)重的后果和影響。本文以大連地鐵一號(hào)線102標(biāo)段為技術(shù)依托,本工程區(qū)間隧道近距離下穿勝利地下購物長廊、污水暗渠等多處風(fēng)險(xiǎn)源；區(qū)間渡線段斷面形式多變,施工工法頻繁轉(zhuǎn)換,對(duì)施工過程中的爆破振速、地表沉降控制等都提出了很高的要求。本文利用現(xiàn)場試驗(yàn)、理論分析、爆破振速監(jiān)測等方法,對(duì)施工過程中的減震控制方法及地表沉降、管線及建筑物保護(hù)等進(jìn)行了系統(tǒng)的研究,主要研究內(nèi)容如下： (1)研究分析了豎井深基坑在緊鄰大型建筑物的情況下,其爆破開挖方法的選擇與確定,以及需要采取的控制爆破措施,優(yōu)化爆破參數(shù),提出了全斷面一次爆破成型的施工方法,不僅保證了施工安全,而且有效加快了施工進(jìn)度。 (2)總結(jié)分析了區(qū)間隧道在近距離下穿大型構(gòu)筑物或者污水暗渠等風(fēng)險(xiǎn)源時(shí),需要采取相應(yīng)的減震爆破技術(shù),通過在隧道拱部打設(shè)大孔徑減震孔,利用其切割、阻隔、緩沖等作用,有效達(dá)到了降低爆破振速的目的。 (3)研究分析了區(qū)間隧道渡線段大斷面的施工工藝及控制措施,分析多種斷面形式頻繁轉(zhuǎn)換下的暗挖結(jié)構(gòu)施工方法,以及其最大斷面不對(duì)稱雙聯(lián)拱斷面形式所采取的施工方法。 (4)制定了突發(fā)事件應(yīng)急救援預(yù)案,針對(duì)可能出現(xiàn)的地表沉陷、管線滲漏、停水停電、塌方冒頂、高空墜落等事件提出了相應(yīng)的應(yīng)急處理措施,加強(qiáng)現(xiàn)場演練,確保施工安全。
[Abstract]:At present, the process of urbanization is developing rapidly, urban population density is increasing, and cities are becoming more crowded. In order to alleviate traffic pressure, large and medium-sized cities set off the upsurge of urban rail transit construction. The construction method and characteristics of subway engineering in hard rock strata are obviously different from those in Beijing, Shanghai, Shenzhen and other cities, where the construction technology is relatively mature. In the construction of this project, blasting work is needed, and blasting vibration may have serious consequences and effects on the surrounding buildings. Based on the 102 section of Dalian Metro Line 1, this project has many risk sources, such as tunnel passing through Shengli underground shopping corridor, sewerage canal, etc. The section of the section is changeable, and the construction method is frequently changed. High requirements are put forward for blasting vibration velocity and ground subsidence control during construction. Based on the field test, theoretical analysis, blasting vibration velocity monitoring and other methods, this paper makes a systematic study on the control method of vibration absorption and surface settlement, pipeline and building protection during construction. The main research contents are as follows: (1) the selection and determination of blasting excavation method for deep shaft foundation pit adjacent to large buildings, and the measures to be taken to control blasting to optimize blasting parameters are studied and analyzed. The construction method of full section primary blasting molding is put forward, which not only ensures the construction safety, but also accelerates the construction progress effectively. (2) summing up and analyzing the risk source of interval tunnel passing through large structure or sewage canal at close range, It is necessary to adopt the corresponding shock absorption blasting technology. By setting large aperture damping holes in the arch of the tunnel, it is necessary to use the functions of cutting, blocking, buffering and so on. The aim of reducing blasting vibration velocity is achieved effectively. (3) the construction technology and control measures of large section of tunnel crossing section are analyzed, and the construction methods of underground excavation structure under the frequent conversion of various cross-section forms are analyzed. And the construction method adopted in the form of the asymmetric double arch section of its maximum section. (4) the emergency rescue plan is formulated for the possible surface subsidence, pipeline leakage, water stoppage and power failure, and the collapse of the roof. The corresponding emergency measures are put forward to strengthen the field drills to ensure the safety of construction.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U455.4
本文編號(hào)：2218648
[Abstract]:At present, the process of urbanization is developing rapidly, urban population density is increasing, and cities are becoming more crowded. In order to alleviate traffic pressure, large and medium-sized cities set off the upsurge of urban rail transit construction. The construction method and characteristics of subway engineering in hard rock strata are obviously different from those in Beijing, Shanghai, Shenzhen and other cities, where the construction technology is relatively mature. In the construction of this project, blasting work is needed, and blasting vibration may have serious consequences and effects on the surrounding buildings. Based on the 102 section of Dalian Metro Line 1, this project has many risk sources, such as tunnel passing through Shengli underground shopping corridor, sewerage canal, etc. The section of the section is changeable, and the construction method is frequently changed. High requirements are put forward for blasting vibration velocity and ground subsidence control during construction. Based on the field test, theoretical analysis, blasting vibration velocity monitoring and other methods, this paper makes a systematic study on the control method of vibration absorption and surface settlement, pipeline and building protection during construction. The main research contents are as follows: (1) the selection and determination of blasting excavation method for deep shaft foundation pit adjacent to large buildings, and the measures to be taken to control blasting to optimize blasting parameters are studied and analyzed. The construction method of full section primary blasting molding is put forward, which not only ensures the construction safety, but also accelerates the construction progress effectively. (2) summing up and analyzing the risk source of interval tunnel passing through large structure or sewage canal at close range, It is necessary to adopt the corresponding shock absorption blasting technology. By setting large aperture damping holes in the arch of the tunnel, it is necessary to use the functions of cutting, blocking, buffering and so on. The aim of reducing blasting vibration velocity is achieved effectively. (3) the construction technology and control measures of large section of tunnel crossing section are analyzed, and the construction methods of underground excavation structure under the frequent conversion of various cross-section forms are analyzed. And the construction method adopted in the form of the asymmetric double arch section of its maximum section. (4) the emergency rescue plan is formulated for the possible surface subsidence, pipeline leakage, water stoppage and power failure, and the collapse of the roof. The corresponding emergency measures are put forward to strengthen the field drills to ensure the safety of construction.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U455.4
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相關(guān)期刊論文 前4條
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，本文編號(hào)：2218648
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