卡塔尔多哈新港基坑施工关键技术研究  

Study on Key Technique Applied in Foundation Pit Construction of Qatar Doha New Port Project

作　　者：谢小明[1] 陈晖[1] Xie Xiaoming Chen Hui(The Second Engineering Co., Ltd. of CCCC Fourth Harbor Engineering Co., Ltd., Guangzhou Guangdong 510300, China)

机构地区：[1]中交四航局第二工程有限公司,广东广州510300

出　　处：《港工技术》2017年第4期85-88,共4页Port Engineering Technology

摘　　要：针对多哈新港基坑施工中遇到的主要关键技术问题进行总结归纳,依据井点降水理论结合现场抽水试验数据,建立渗透计算模型,通过压水试验进一步分析该地区的地层渗透特性,为基坑止降水提供充分的数据;通过有限元数值模拟,研究防渗墙止水帷幕的截水效果,并进行现场水位观测进行验证;对超大基坑开挖降排水中的沉淀池进行了优化设计。This study covers the summary of key technical problems occurred in the foundation pit construction of Doha new port project. The well dewatering theory has been combined with field pumping test data to build a permeability computation model. The permeability characteristic of local stratum is further analyzed by water pressure test, which provides sufficient data for the construction of water-stop and dewatering of foundation pit. The effect of cut-off curtain of diaphragm wall is analyzed by using finite element numerical simulation, which is also verified according to the result of field water level measurement. In addition, an optimum design is put forward for the sedimentation basin in the excavation, dewatering and drainage project of oversize foundation pit.

关 键 词：多哈新港 挖入式港池 深井降水 关键技术 港口工程 

分 类 号：TU753[建筑科学—建筑技术科学] TU74