土工基础

›› 2018, Vol. 32 ›› Issue (4): 419-423.

• 工程实录 • 上一篇    下一篇

富水砂层中过江隧道中间风井三维数值模拟分析

万蓓菁   

  1. （南昌市城市规划设计研究总院，南昌 330038）
  • 收稿日期:2017-09-12 修回日期:2017-09-20 出版日期:2018-08-20 发布日期:2018-08-23
  • 作者简介:万蓓菁（1962-），女，高级工程师，研究方向为轨道交通设计管理。

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

WAN Beijing   

  1. (Nanchang Urban Planning & Design Institute, Nanchang 330038)
  • Received:2017-09-12 Revised:2017-09-20 Online:2018-08-20 Published:2018-08-23

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。

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

Abstract: 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.

Key words: Saturated Sand Layers, Ventilation Shaft, Three-Dimensional Modelling, Refinement, Three-Dimensional Stress State