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规划修建的深圳地铁11号线车公庙车站紧贴地铁1号线和丰盛町商业街围护结构,为确定设计方案可行性,基于三维有限元数值分析方法,考虑地下水情况,针对分别采用盖挖逆筑、明挖顺筑施工工艺的地铁车站结构受力情况,开展了地铁车站施工期间及后期围护的结构变形分析,确定了不同施工工艺对地铁车站围护结构的影响。研究结果表明:①虽然2种施工工艺在地铁车站施工过程中都能很好地降低地下水位,但是盖挖逆筑施工完成后,孔隙水压力值与周围土体内孔压值的差距相对明挖顺筑施工较大,极易造成毗邻地下结构向基坑内侧倾斜;②盖挖逆筑施工工艺下,毗邻地下结构横向变形相对较大;③在基坑施工过程中,应对1号线车公庙车站加强支护和监测,防止其产生较大变形。
Planning and construction of Shenzhen Metro Line 11 Chegongmiao Station close to Metro Line 1 and Fusheng Choi Commercial Street envelope structure, in order to determine the feasibility of the design scheme, based on the three-dimensional finite element numerical analysis method, considering the groundwater situation, Excavation, digging and digging along the construction process of the subway station structure of the force situation, carry out the metro station construction and post-construction envelope deformation analysis to determine the different construction techniques on the metro station envelope structure. The results show that: (1) Although the two kinds of construction techniques can well reduce the groundwater table during the construction of the metro station, the gap between the pore water pressure and the pore pressure in the surrounding soil is relatively clear after excavation construction is completed The construction of a large cistern is very easy to cause the adjacent underground structures to tilt to the inside of the excavation pit. (2) The lateral deformation of adjacent subsurface structures is relatively large under the construction technology of digging and digging; ③ During the construction of foundation pit, Temple station to strengthen the support and monitoring to prevent its produce greater deformation.