土工基础

›› 2015, Vol. 29 ›› Issue (1): 74-76.

• 工程实录 • 上一篇    下一篇

盐矿采空区蠕变收缩诱发铁路路基变形预测模型

汤 霞   

  1. （中铁第四勘察设计研究院集团有限公司地路处，武汉 430063）
  • 收稿日期:2014-10-31 出版日期:2015-02-20 发布日期:2015-03-13
  • 作者简介:汤霞（1961-），女，工程师，研究方向为铁路路基的设计。

Prediction Model for Railway Subgrade Deformation Induced by Abandoned Salt Mines

TANG Xia   

  1. (China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063)
  • Received:2014-10-31 Online:2015-02-20 Published:2015-03-13

摘要： 井矿盐的开采会形成大量充满卤水的盐岩采空区，由于盐岩具有良好的流变性，闭井后的盐溶腔会不断收缩，引发地表变形，进而引起穿过采空区铁路路基的变形，威胁铁路安全。基于圆柱形盐溶腔的体积收缩解析解和Mogi模型，建立了一套可以快捷预测采空区上方路基变形发展时空规律的模型，可为穿越盐岩采空区附近区域的铁路路基变形提供评价建议。

关键词: 盐岩采空区, 路基变形, Mogi模型, 蠕变

Abstract: The underground extraction of salt rock will form brine water filled abandoned caverns. Due to the creep of the salt rock, the abundant salt rock caverns will contract in volume and will result in the deformation of railway subgrade. The excessive deformation of the railway subgrades will affect the safe operation. An analytical solution that is based on ground deformation resulting from the contraction of a cylindrical salt rock cavity and Mogi Model is developed. This model can provide solutions of the development of deformation with time of the railway subgrade over abandoned salt rock mines.

Key words: Abandoned Salt Rock Mines, Subgrade Deformation, Mogi Model, Creep