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为确保隧道施工安全和隧道结构稳定,对铁路隧道洞口及明洞段边坡防护进行了探讨,提出了具体的处理措施,指出在实际设计和施工中应针对性的进行隧道洞口及明洞边坡防护,以保证隧道设计“经济”“合理”“安全”“环保”。 相似文献
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结合西直沟1号隧道施工实践,介绍了采用隧道偏压安全防护处理的施工工艺及质量控制,并加以分析论述,通过有效处理,解决了隧道山体偏压问题,确保了隧道的顺利贯通。 相似文献
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随着现代交通运输和建造业的发展,以及土地的稀缺和资源的有限,隧道工程被越来越广泛的应用。隧道工程作为一项地下建筑工程,其建造施工安全是一项复杂、细致的技术,涉及面广,难度大。因此,做好隧道工程的安全防护工作,提高隧道施工中的作业安全,降低事故发生率,是十分必要的。本文将主要从隧道工程的开挖、支护、爆破、通风等方面论述其安全防护技术。 1.隧道工程的开挖与支护 1. 1隧道工程首先必须对掘进工艺 (开挖、支护与衬砌 )制订周密的施工方案。本文主要针对隧道施工的常见建造法——新奥地利隧道建造法 (NATM)… 相似文献
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根据某隧道洞口滑坡治理实际,通过对洞口岩堆及滑坡检测,就滑坡防护所采用的施工技术进行了分析,包括锚固桩、锚杆框架梁、土钉墙施工,对确保滑坡体稳定、隧道洞口施工安全具有积极指导意义。 相似文献
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随着我国经济建设的快速发展,连接各个城市之间的公路铁路对我国经济的发展提供了极大的便利性,方便了城市之间的人员、物资的流通,对各城市的交通、经济、贸易、旅游等行业的发展起到特别好的促进作用。同时,随着我国公路铁路的快速建造,而我国地质条件又以多山的情况为主,这就要求在进行公路铁路建设时需进行隧道的施工,而保障隧道施工的质量和工程施工安全防护措施就显得至关重要。因此,科学地研究分析了隧道施工过程中的设备管理,对人员施工规范制度等方面进行总结,以保证隧道施工高效、有序进行。 相似文献
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白岩隧道煤层段安全施工防护技术 总被引:1,自引:1,他引:0
介绍了渝怀铁路白岩隧道场地地质概况,从通风设备选择、瓦斯检测、超前探孔等方面,阐述了有效的安全防护技术措施,以达到隧道煤层段安全施工的目的。 相似文献
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彭华 《地下空间与工程学报》2016,12(5):1371-1377
随着我国地铁线路的快速发展,不可避免地会遇到穿越繁忙干线铁路重大风险源施工技术难题。目前世界上针对这类问题的研究较少,没有可参考的工程案例。结合北京地铁10号线下穿京沪高速铁路、京九铁路等重大风险源穿越施工,笔者进行了系统的试验测试分析。结果表明:(1)若采取措施得当,完全可以进行穿越重大风险源施工,但应注意进行各重要结构和部件的精确监测,使施工始终处于安全可控状态;并建议采用自动化监测。(2)线路在穿越时会产生较快的沉降,穿越后沉降即趋于稳定;双线穿越时,后穿越线路会影响先穿越线路;当恢复线路后,穿越影响区还会发生一定的缓慢变形。(3)初步提出了一套路基及接触网杆变形控制指标及标准,以供类似工程参考。此外,本案例的成功实施为我国及世界其他国家进行穿越高速铁路等重大风险源施工积累了宝贵的经验。 相似文献
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本文以武汉地铁二号线及四号线洪中区间隧道为背景,针对多条重叠隧道小间距的特点,提出盾构隧道“先下后上”的总体施工原则,重点阐述了盾构掘进控制、夹层土注浆加固和洞内临时支撑隧道加固等关键措施,通过监测结果有效验证了其成功,可为今后的重叠隧道设计、施工管理提供经验借鉴。 相似文献
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轨道交通网络化发展导致线路之间的交叉穿越日益增多,地铁新建车站下穿既有车站土建技术尚无统一认识.在国内工程案例分析的基础上,系统归纳了现有穿越技术措施,并以国内目前穿越规模最大的北京地铁6号线苹果园站下穿1号线苹果园站工程为例,介绍了各类土建技术措施在该工程中的应用.研究表明:(1)可从既有车站沉降的影响来源、传播路径... 相似文献
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Qian Fang Dingli Zhang Louis Ngai Yuen Wong 《Tunnelling and Underground Space Technology incorporating Trenchless Technology Research》2011,26(6):750-763
Ground surface settlement induced by urban subway construction using shallow tunnelling method is inevitable and it may cause a series of negative impact to existing nearby structures and utilities. In order to guarantee environmental safety, a risk management methodology which aims at process control for ground settlement and existing nearby structures is proposed. It includes 5-stage technology-based steps: survey of existing conditions, designing control standards for key risk factors, analyzing environmental response under tunnel construction and designing process control standards, monitoring and taking proper process control measures during construction, and risk reassessment after construction. This methodology was put into practice in the Huangzhuang subway station construction which is the largest cross interchange subway station construction using shallow tunnelling method in China. According to site survey, nearby pipelines and existing buildings were determined to be the key risk factors. The risk control standards for nearby pipelines and existing buildings were made according to available standards in China and related literatures. Design of process control standards for ground surface settlement was assisted by numerical simulation, which aimed at controlling the key risk factors. During construction, monitoring was adopted for the nearby pipelines, existing buildings and ground surface. After the four drifts excavation of the double-deck part of Line 4, a series of risk control measures, which included treatment of the unfavorable geological bodies, installation of roof pipes, compensation grouting, full-face grouting and some other control measures, were taken. Due to these risk control measures, ground surface settlements, except at two measuring points of Line 4, were successfully controlled under the given process control standards for both Line 4 and Line 10. All the pipelines and buildings were under their normal service state during tunnel construction. The maximum deflection for the 6 pipelines above the station was controlled to be within 2 mm/m and the maximum settlement of all the monitoring points for the pipelines was less than 30 mm. For the four important existing buildings in close vicinity, the maximum deflection was less than 1 mm/m; the maximum settlement value was 6.8 mm and the maximum uplift value was 3.0 mm. The risk control system was shown to be effective in ensuring environment safety, structure safety and construction safety. These safety control methods, the methodology of designing these control standards and the measures taken in the construction can serve as a practical reference for other similar projects. 相似文献
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以武汉地铁4号线一期第四标段铁机村站~岳家嘴站盾构区间为背景,详细介绍了在盾构小净距平行隧道施工的情况下采取的加固措施,并通过各种监测表明,这些措施能够满足工程实际的需要。 相似文献
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上海市轨道交通15号线工程土建14标段古北路站—天山路站区间盾构隧道穿越运营地铁线路时发现沼气层,对施工安全造成严重影响.以此为例,通过采取地质雷达探测、打设放气/注浆孔、运营地铁隧道内部应急注浆施工、运营地铁隧道监测、施工现场防毒防爆等措施,确保了运营隧道与在建隧道的施工安全. 相似文献
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Su Jinliang 《施工技术》2008,(Z2)
基于北京地铁四号线菜市口车站工程,介绍了钢管柱桩基的施工方案论证、技术措施和检测试验技术。详细阐述了人工挖孔与机械钻孔相结合的施工方法,并简化了试验程序,满足了工期要求。 相似文献