富水砂层中过江隧道中间风井三维数值模拟分析  

Three-Dimensional Numerical Analysis of the Ventilation Shaft of an River Crossing Tunnel in Saturated Sandy Layers

作　　者：万蓓菁 WAN Beijing(Nanchang Urban Planning ＆ Design Institute,Nanchang 33003)

机构地区：[1]南昌市城市规划设计研究总院

出　　处：《土工基础》2018年第4期419-423,共5页Soil Engineering and Foundation

摘　　要：过江隧道中间风井埋深较深,临近江水及堤防工程,周边地质及水文条件较复杂,穿越富水砂层,对安全性要求较高。风井内部结构采用矩形箱体框架结构型式,中板为梁板体系,开孔较多,具有典型的空间受力特性,需建立精细化的三维空间模型对其进行精确的受力分析。对过江隧道中间风井的计算模型进行分析,基于实际工程建立空间三维模型,针对模型的建立、受力工况及三维受力特性等进行了分析,中间风井空间受力特性明显,采取有效构造措施应对风井的相关空间受力特性。The ventilation shaft for a river crossing tunnel had a large embedment depth and closed to the river water and levee system with complicated geological and hydrological conditions.Higher safety measures were required due to the penetration of the saturated sandy layers.A rectangular box frame structure with slab and beam system was utilized for the ventilation shaft.Due to the numerous required openings on the shaft body,the structure has a typical three-dimensional structure type and could only be simulated by the three-dimensional analysis.A numerical model was established for the ventilation shaft.Analyses were performed and it was concluded that the middle portion of the shaft had larger stress and the structure design was appropriately performed.

关 键 词：富水砂层 中间风井 三维空间模型 精细化 空间受力特性 

分 类 号：TB115[理学—数学]