| 复杂环境条件下的洞内管井降水技术研究 |
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| 引用本文： | 宋克英,冯科明,马健.复杂环境条件下的洞内管井降水技术研究[J].岩土工程技术,2014,28(6):296-299. |
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| 作者姓名： | 宋克英 冯科明 马健 |
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| 作者单位： | 北京城建勘测设计研究院有限责任公司,北京,100101 |
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| 摘 要： | 城市中心密集建筑群使得地铁需长距离穿越既有建（构）筑物,导致地面管井施工作业条件越来越难,降水沉降控制要求也越来越严。从轨道交通工程建设出发,当受施工场地限制时,提出在导洞内施工管井,并对降水导洞的设计、成井机械及施工工法进行了论述。针对施工降水引起的附加沉降,采用地下水三维渗流与地面沉降耦合模型计算软件——Pro-cessing Modflow,建立地下水流场与地面沉降的耦合模型,根据现场监测数据,运用参数修正后的模型,设计不同的抽降方案,分时段进行沉降预测,及时分析施工降水对周围环境的影响程度,可指导类似工程施工,具有重要的工程实际意义。
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| 关 键 词： | 导洞 管井降水 沉降预测 |
Research of the Tunnel and Dewatering Technology under Complicated Environment Conditions |
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| Song Keying,Feng Keming,Ma Jian.Research of the Tunnel and Dewatering Technology under Complicated Environment Conditions[J].Geotechnical Engineering Technique,2014,28(6):296-299. |
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| Authors: | Song Keying Feng Keming Ma Jian |
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| Institution: | Song Keying Feng Keming Ma Jian (Beijing Urban Construction Exploration and Surveying Design Research Institute Co. , I.td, Beijing 100101, China) |
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| Abstract: | City center metro dense buildings need to make a long distance through the existing building （structure）, re- sulting in ground tube well construction and more difficult operating conditions, precipitation, sedimentation control require- ments have become more stringent. In this paper, starting from the rail transit construction, when restricted by the construc- tion site, construction of tube wells proposed in the guide hole, and precipitation guide hole design, as well machinery and con- struction method are discussed. For additional settlement construction precipitation caused by the use of three-dimensional groundwater flow model coupled with land subsidence calculation software--Processing Modflow, establish coupling model of groundwater flow field and land subsidence, according to the on-site monitoring data, the model parameters using the modified, different designs pumping down the program, scheduled settlement prediction conduct timely analysis of the impact of construc- tion on the surrounding environment of precipitation, and can guide a similar construction, the project has an important practi- cal significance. |
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| Keywords: | guide hole well dewatering settlement prediction |
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