区间隧道下穿大型建筑物技术措施与风险控制
发布时间：2018-09-02 07:14
【摘要】：目前我国城市化进程正在快速发展,城市人口密度越来越大,城市正在变得愈加拥挤。为缓解交通压力,各大中城市掀起了建设城市轨道交通的热潮。在硬质岩层中修建地铁工程,其施工方法及特点明显区别于北京、上海、深圳等城市施工技术相对成熟的软弱地层。在进行本工程施工时,需要采取爆破作业,而爆破振动对周边建(构)筑物有可能造成严重的后果和影响。本文以大连地铁一号线102标段为技术依托,本工程区间隧道近距离下穿胜利地下购物长廊、污水暗渠等多处风险源；区间渡线段断面形式多变,施工工法频繁转换,对施工过程中的爆破振速、地表沉降控制等都提出了很高的要求。本文利用现场试验、理论分析、爆破振速监测等方法,对施工过程中的减震控制方法及地表沉降、管线及建筑物保护等进行了系统的研究,主要研究内容如下： (1)研究分析了竖井深基坑在紧邻大型建筑物的情况下,其爆破开挖方法的选择与确定,以及需要采取的控制爆破措施,优化爆破参数,提出了全断面一次爆破成型的施工方法,不仅保证了施工安全,而且有效加快了施工进度。 (2)总结分析了区间隧道在近距离下穿大型构筑物或者污水暗渠等风险源时,需要采取相应的减震爆破技术,通过在隧道拱部打设大孔径减震孔,利用其切割、阻隔、缓冲等作用,有效达到了降低爆破振速的目的。 (3)研究分析了区间隧道渡线段大断面的施工工艺及控制措施,分析多种断面形式频繁转换下的暗挖结构施工方法,以及其最大断面不对称双联拱断面形式所采取的施工方法。 (4)制定了突发事件应急救援预案,针对可能出现的地表沉陷、管线渗漏、停水停电、塌方冒顶、高空坠落等事件提出了相应的应急处理措施,加强现场演练,确保施工安全。
[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.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.4
本文编号：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.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.4
【参考文献】
相关期刊论文 前4条
1 李旭东;白海峰;周志顺;;地面建筑物控制爆破的浅埋隧道暗挖方法研究[J];铁道工程学报;2011年01期
2 张平锁;;大帽山隧道微震爆破控制技术[J];铁道建筑技术;2010年08期
3 王树才;安玉波;郑鹏武;;北京地铁十号线通过暗河的方案比选[J];铁道建筑;2006年04期
4 钟有信;耿伟;胡斌;;象山特长铁路隧道重大风险评估及控制[J];铁道勘察;2012年04期
，本文编号：2218648
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