土工基础

›› 2017, Vol. 31 ›› Issue (5): 554-557.

• 工程实录 • 上一篇    下一篇

盾构下穿富水砂层区域建筑物适用性研究

曹鹏飞   

  1. （南昌轨道交通集团有限公司，南昌 330038）
  • 收稿日期:2017-06-08 修回日期:2017-07-03 出版日期:2017-10-20 发布日期:2017-10-29
  • 作者简介:曹鹏飞（1985-），男，工程师，研究方向为地铁设计管理。

Shielded Tunnel Excavation in Saturated Sand Underneath the Existing Buildings

CAO Pengfei   

  1. (Nanchang Rail Transportation Group Co., Ltd., Nanchang 330038)
  • Received:2017-06-08 Revised:2017-07-03 Online:2017-10-20 Published:2017-10-29

摘要： 盾构法以其安全及适应性广等优势在区间隧道施工中得到应用与推广。但盾构法施工过程中势必引起地层损失与土体扰动，从而引起地表变形，其中对于富水砂层等薄弱土层影响更为明显。结合南昌地铁区间隧道设计实例，分别采用PECK法与有限元法计算盾构下穿富水砂层区域房屋的沉降值，得到的理论值可以作为现场实际监测值的对比验证，为现场施工提供技术支持，为以后类似地质条件区间隧道设计提供参考。

关键词: 富水砂层, 盾构法, Plaxis

Abstract: With advantages of safe and wide range of applicable geological strata, the shielded tunnel excavation method receives wider applications. However, the soil disturbance during the tunnel excavation will result in the ground subsidence, especially, in saturated sand layers. This paper presents a ground subsidence prediction results of shielded tunnel excavation in the Nanchang Regional Subway System project. Both PECK method and finite element methods are used to predict the building settlement over saturated sand layers during the tunnel excavation. The results are compared with the construction monitoring results and found they are satisfactory.

Key words: Saturated Sand Layers, Shielded Tunnel Excavation, PLAXIS