共查询到19条相似文献,搜索用时 718 毫秒
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针对复杂地层邻近浅基础建筑物地铁车站深基坑施工,本文结合杭州机场轨道快线SGJC-1标苕溪站为例,在车站深基坑变形控制、深基坑周边建筑物变形控制和基坑施工全过程管线变形控制等施工关键技术方面进行了研究分析。结果表明,围护结构变形、建筑物变形和管线变形均在规范允许范围内。 相似文献
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结合上海地铁天潼路车站十字换乘段深基坑的工程实例,介绍了在周围建筑物和管线复杂等条件下的不规则超深基坑顺逆结合的施工技术,研究基坑施工过程中围护支撑形式和土方开挖方法,取得了良好施工效果。 相似文献
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对地铁车站机电安装工程综合管线施工管理与技术做了指引性阐述,对综合管线施工安装布置原则作了介绍,在地铁车站施工中得到了实际应用,效果明显。 相似文献
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《建设科技(建设部)》2016,(9)
本文结合浅埋地段暗挖地铁车站施工,为确保施工及周边建筑物安全,保证地表及地下管线沉降量,对超前大管棚的施工工艺及施工方法、二衬施工过程中的换撑施工工艺及施工方法及中洞二衬施工方法及施工步序等关键技术进行探讨。 相似文献
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《Planning》2019,(8)
随着我国城市化进程的快速发展,地面交通拥堵问题突显,地铁以其巨大的运量、能满足特殊地段的交通需求,以及抵抗恶劣自然天气的能力等特点越来越受到我国各大城市的青睐,目前地铁也是各大城市对外的名片之一,在城市居民日常生活中所占的重要性也越来越大。虽然地铁给人们的生活带来了便捷,但在地铁施工过程中,尤其是车站深基坑施工的过程中还是存在很多风险。如何确保地铁车站施工过程中深基坑的安全,包括周边建筑物、各类管线、道路等设施的安全,是我们施工过程中要控制的重点,因此,加强地铁车站深基坑开挖施工技术的研究是十分有必要的。 相似文献
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结合大直径管线横穿上海轨道交通7号线铜川路地铁车站深基坑施工的实例,介绍了深基坑施工中采用的钻孔灌注桩+旋喷桩围护支撑体系的设计和施工技术:施工过程中成功解决了横穿Ф1200mm污水管线的施工。铜川路地铁车站深基坑的顺利实施.积累了大直径管线横穿地铁车站深基坑的施工经验.可供长三角地区类似软土地层的地铁车站施工借鉴。 相似文献
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地铁浅埋暗挖法施工引起的地表沉降控制标准的统计分析 总被引:19,自引:3,他引:19
由于在地铁施工过程中不可避免地会对地层产生扰动,就必然产生不同程度的地面沉降,从而对地铁施工及周边环境的安全性产生不利的影响,例如对城市的道路、桥梁、地下管线和地面建构筑物等的安全性产生不利的影响。因此,科学合理地确定地表沉降控制指标,以减轻、消除和避免由于地表沉降产生的不利影响,是十分必要的。通过对众多工程实例的实地调研,并综合运用模糊聚类分析方法对实地调研数据进行统计分析,同时考虑工程建设的经济性,给出在目前工程条件下地表沉降控制值的建议值,这对指导地铁工程的施工有十分重要的意义。 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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广州市黄沙南站某住宅楼工程临近地铁线路,周边环境复杂,管线较多,场地狭窄。工程整体采用地下连续墙内支撑支护。考虑到对地铁隧道的保护,在临近地铁线路条件下基坑设计和施工过程中,采取了调整地铁侧地下连续墙的厚度、合理安排槽段开挖顺序、使用旋喷桩和水泥搅拌桩处理、按一定的原则开挖土方、控制支撑的施工,以及采取相应的止水降水等措施。监测结果表明,效果显著。 相似文献
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城市地铁隧道超近距下穿污水管数值模拟分析 总被引:1,自引:0,他引:1
随着城市的发展,在盾构地铁施工的过程中,对既有建筑(管线)的交叉穿越情况日益增多4,对工程设计和施工造成极大困难,因此如何对地下建筑物在近距离条件下的施工影响减少到最低限度,是目前在在城市地铁施工过程中的核心技术问题.本文通过对某城市地铁1号线某区间超近距下穿大口径污水管为研究对象,利用FLAC3D建立数值模型,对盾构... 相似文献
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针对北京地铁十号线呼家楼站风道施工情况,对风道施工方案和邻近建筑物的保护措施进行了详细的研究,监测结果表明所采用施工方案是合理的,确保了邻近建筑物的安全和地铁风道施工的安全。 相似文献
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以北京地铁八号线出入段线区间暗挖隧道近距离下穿污水管道施工为例,介绍了具体的施工方案,从施工准备及隧道下穿施工两方面阐述了方案的实施方法,并对隧道下穿管道沉降数据进行了监测,指出各数据处于控制范围内,管线变形微小,达到了预期目标。 相似文献