地铁叠落区间穿越底层框架-砌体结构建筑物施工变形特性研究  

Deformation Characteristics of Parallel Shielded Tunnels Passing Through Existing Bottom Reinforced Concrete Frame-Masonry Structure Building

作　　者：张剑涛 ZHANG Jiantao(Beijing Huanan Engineering Inspection&Test Co.Ltd.,Beijing 100082)

机构地区：[1]北京环安工程检测有限责任公司,北京100082

出　　处：《土工基础》2023年第2期182-187,共6页Soil Engineering and Foundation

基　　金：国家自然科学基金项目(51578023)。

摘　　要：以长春某典型工程为例,应用现场检测与数值计算相结合的方法,研究了地铁叠落区间施工过程中,上方底层框架-砌体结构建筑物的变形特性。底层框架-砌体结构建筑物为“上柔下刚”结构体系,可通过对建筑物独立基础沉降量及差异沉降的分析,了解上部砌体结构与底层框架结构的变形特性;地铁叠落区间施工过程中,建筑物沉降受上部盾构隧道施工影响较大,而受下部盾构隧道施工影响较小;地铁叠落区间穿越底层框架-砌体结构建筑物施工过程中,采用先施工下方盾构隧道,后施工上方盾构隧道的施工顺序可有效控制上方建筑物的沉降量及差异沉降,减少对底层框架-砌体结构建筑物的影响。A bottom reinforced concrete frame and masonry mixed structure in Changchun is next to a proposed parallel shielded tunnel excavation.Its deformation characteristics during the tunnel excavation is studied with the combination of construction monitoring and the numerical analyses methods.The stiffness of this mixed reinforced concrete frame and masonry structure has the characteristics of“upper flexible and bottom rigid”and the impact of the total and differential settlement on the performance of this structure are investigated throughout the analysis of these independent footings.In the construction process of the subway section excavation,the settlement of this structure is greatly affected by the construction of the upper portion of the shielded tunnel,but less affected by the construction of lower portion of the shielded tunnel.In the construction process of the parallel shielded tunnel that crossing the mixed structure building,the construction sequence of the first constructing the lower portion of the shielded tunnel and then constructing the upper portion of the shielded tunnel can effectively control the settlement and differential settlement of the above building and reduce the impact on the existing building structure.

关 键 词：岩土工程 叠落隧道 底层框架结构 数值模拟 变形特性 

分 类 号：TU433[建筑科学—岩土工程]