深圳地铁5号线翻灵区间盾构施工的关键技术问题及综合对策研究
发布时间：2018-10-23 20:38
【摘要】：随着城市建设的蓬勃发展和地下空间的不断开拓,经过丰富工程实践的检验,盾构工法以其地质适应性强、施工速度快、对周边环境干扰小等优点已成为修建地铁隧道、越江公路隧道和输水管隧道等城市地下工程施工工法的首选。为了满足在城市繁华地区及特殊地下工程的施工,大量的新型盾构施工技术应运而生。就目前我国盾构技术的使用情况而言,各种施工问题的解决、新技术的开发将成为当务之急,结合工程实际发展我国的盾构技术是一个极具长远意义的研究课题。本文以深圳地铁5号线翻身站~灵芝站区间盾构隧道为工程背景,针对土压平衡盾构近距离穿越建(构)筑物、盾构隧道管片接缝防水、盾构施工运输组织和盾构机空推矿山法区段等关键技术问题及其潜在的不利影响开展研究,并结合工程实际情况提出了相应的综合施工对策。(1)针对盾构隧道施工对邻近建(构)筑物基础(以群桩基础为主)的影响开展研究,以隧道开挖方位作为关键影响因素,分别在隧道埋深以及隧道与桩基水平距离不同的情况下,采用理论分析结合数值模拟的手段研究盾构施工对群桩基础的影响规律,并提出盾构隧道近距离穿越建(构)筑物的施工安全控制对策。(2)通过对国内现有盾构隧道工程案例的调研分析,从管片接头构造形式、弹性橡胶密封垫的防水参数及材质等方面,结合深圳地铁5号线翻灵区间隧道工程的实际情况,提出了适用于本工程的盾构隧道管片接缝防水措施。(3)对影响土压平衡盾构运输效率的因素及盾构施工运输组织面临的问题进行分析,通过主要施工材料的选择及用量计算,确定了运输设备选型及运输组织方案,从提高设备运输能力及合理组织运输方案两个方面提出相应的运输优化措施。(4)针对盾构机空推矿山法区段施工可能出现的盾构机姿态难以控制、盾构机卡壳、管片接缝渗漏水、管片破损开裂及上浮等施工风险问题,提出相应的施工对策,既可缩短工期,降低工程成本,同时有效降低了施工风险。本文结合深圳地铁5号线翻灵区间隧道工程实例,针对盾构施工的流程及特殊地段的施工问题,提出了土压平衡盾构综合施工对策,不仅完善了盾构施工安全控制技术,减小了施工难题处理不当对隧道结构服役期安全的不利影响,同时确保了工程安全顺利进行,取得了良好的社会效益和经济效益,对今后类似工程具有参考价值和借鉴意义。
[Abstract]:With the vigorous development of urban construction and the continuous development of underground space, through the examination of rich engineering practice, shield tunneling has become the construction of subway tunnel because of its advantages of strong geological adaptability, fast construction speed and little interference to the surrounding environment. The first choice of construction method for urban underground engineering such as cross-river highway tunnel and aqueduct tunnel. In order to meet the needs of the construction of special underground projects in prosperous areas of cities, a large number of new shield construction techniques emerged as the times require. As far as the application of shield technology in our country is concerned, the solution of various construction problems and the development of new technology will become an urgent matter. It is a very significant research topic to develop shield technology in our country in combination with the engineering practice. In this paper, based on the engineering background of shield tunneling between Ganoderma station and overturning station of Shenzhen Metro Line 5, aiming at earth-pressure balance shield tunneling passing through the building (construction) in close distance, the segment joint of shield tunnel is waterproof. Carrying out research on key technical problems such as transportation organization of shield construction and air pushing mine section of shield machine and its potential adverse effects, Combined with the actual situation of the project, the corresponding comprehensive construction countermeasures are put forward. (1) in view of the influence of shield tunnel construction on the adjacent building (pile group foundation), the tunnel excavation orientation is taken as the key influencing factor. Under the condition of different tunnel depth and horizontal distance between tunnel and pile foundation, the influence of shield construction on pile group foundation is studied by means of theoretical analysis and numerical simulation. And put forward the construction safety control countermeasures of shield tunneling through the building (construction) in close distance. (2) through the investigation and analysis of the existing shield tunnel engineering cases in China, from the segment joint construction form, The waterproofing parameters and materials of elastic rubber gasket, combined with the actual situation of Shenzhen Metro Line 5 tunnel project, The waterproofing measures for segment joint of shield tunnel are put forward. (3) the factors affecting the transportation efficiency of shield tunneling with earth pressure balance and the problems faced by shield construction transportation organization are analyzed, and the selection of main construction materials and the calculation of the amount of construction materials are carried out. The selection of transportation equipment and the transportation organization plan are determined. This paper puts forward the corresponding transportation optimization measures from the aspects of improving the transportation capacity of equipment and organizing the transportation scheme reasonably. (4) aiming at the difficulty of controlling the posture of shield machine which may appear in the construction of air pushing mine section of shield machine, the clamping of shield machine, the leakage of joint of pipe piece, etc. This paper puts forward the corresponding construction countermeasures, which can not only shorten the construction period, reduce the project cost, but also effectively reduce the construction risk. In this paper, based on the example of Shenzhen Metro Line 5 tunnel, aiming at the process of shield construction and the construction problems in special section, the comprehensive construction countermeasures of earth pressure balance shield tunneling are put forward, which not only perfect the safety control technology of shield construction, but also improve the safety control technology of shield construction. It reduces the adverse effect of improper handling of construction problems on the safety of tunnel structure during the service period, at the same time ensures the safety and smooth progress of the project, obtains good social and economic benefits, and has reference value and reference significance for similar projects in the future.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43
本文编号：2290398
[Abstract]:With the vigorous development of urban construction and the continuous development of underground space, through the examination of rich engineering practice, shield tunneling has become the construction of subway tunnel because of its advantages of strong geological adaptability, fast construction speed and little interference to the surrounding environment. The first choice of construction method for urban underground engineering such as cross-river highway tunnel and aqueduct tunnel. In order to meet the needs of the construction of special underground projects in prosperous areas of cities, a large number of new shield construction techniques emerged as the times require. As far as the application of shield technology in our country is concerned, the solution of various construction problems and the development of new technology will become an urgent matter. It is a very significant research topic to develop shield technology in our country in combination with the engineering practice. In this paper, based on the engineering background of shield tunneling between Ganoderma station and overturning station of Shenzhen Metro Line 5, aiming at earth-pressure balance shield tunneling passing through the building (construction) in close distance, the segment joint of shield tunnel is waterproof. Carrying out research on key technical problems such as transportation organization of shield construction and air pushing mine section of shield machine and its potential adverse effects, Combined with the actual situation of the project, the corresponding comprehensive construction countermeasures are put forward. (1) in view of the influence of shield tunnel construction on the adjacent building (pile group foundation), the tunnel excavation orientation is taken as the key influencing factor. Under the condition of different tunnel depth and horizontal distance between tunnel and pile foundation, the influence of shield construction on pile group foundation is studied by means of theoretical analysis and numerical simulation. And put forward the construction safety control countermeasures of shield tunneling through the building (construction) in close distance. (2) through the investigation and analysis of the existing shield tunnel engineering cases in China, from the segment joint construction form, The waterproofing parameters and materials of elastic rubber gasket, combined with the actual situation of Shenzhen Metro Line 5 tunnel project, The waterproofing measures for segment joint of shield tunnel are put forward. (3) the factors affecting the transportation efficiency of shield tunneling with earth pressure balance and the problems faced by shield construction transportation organization are analyzed, and the selection of main construction materials and the calculation of the amount of construction materials are carried out. The selection of transportation equipment and the transportation organization plan are determined. This paper puts forward the corresponding transportation optimization measures from the aspects of improving the transportation capacity of equipment and organizing the transportation scheme reasonably. (4) aiming at the difficulty of controlling the posture of shield machine which may appear in the construction of air pushing mine section of shield machine, the clamping of shield machine, the leakage of joint of pipe piece, etc. This paper puts forward the corresponding construction countermeasures, which can not only shorten the construction period, reduce the project cost, but also effectively reduce the construction risk. In this paper, based on the example of Shenzhen Metro Line 5 tunnel, aiming at the process of shield construction and the construction problems in special section, the comprehensive construction countermeasures of earth pressure balance shield tunneling are put forward, which not only perfect the safety control technology of shield construction, but also improve the safety control technology of shield construction. It reduces the adverse effect of improper handling of construction problems on the safety of tunnel structure during the service period, at the same time ensures the safety and smooth progress of the project, obtains good social and economic benefits, and has reference value and reference significance for similar projects in the future.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43
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