新疆公路盐渍土路基盐胀力的数值模拟分析  

Numeric Simulation Analysis of Salt Heaving Force to Salty Soil Sub-grade in Expressways of Xinjiang

作　　者：刘军柱[1] 李志农 刘海洋[1] 吕风 王正标[1] 

机构地区：[1]中国矿业大学,北京100083 [2]新疆交通厅,乌鲁木齐830000

出　　处：《公路交通技术》2008年第1期1-4,8,共5页Technology of Highway and Transport

基　　金：国家西部交通建设科技项目-盐渍土地区路基路面病害防治技术研究(200331879751)

摘　　要：针对新疆盐渍土地区公路盐胀造成路面大面积纵向开裂的病害现状,提出盐渍土路基盐胀力的数值模拟方法,采用FLAC数值模拟软件,以S310线的病害为依托,模拟盐胀力的大小及其在路基中的传力特性。通过分析路基断面不同高度的水平应力分布规律,提出把公路路面的水平位移与盐胀力的比值作为盐渍土路基的水平盐胀率的概念。Aiming at the defective status in quo of large - area salty soil road in expressway of Xinjiang, a numeric simulation grade is proposed in this paper. Based on the defects on S310 longitudinal surface cracks due to salt heaving to method for salt heaving force to salty soil sub- Expressway, this method simulates the degree of salt heaving force and its transmission characteristics in sub- grade by means of FLAC numeric simulation soft- ware. By analyzing the distribution rule of horizontal stresses of sub - grade sections with different heights, a concept, which regards the ratio of horizontal displacement to salt heaving force on the surface of expressway as the horizontal salt heaving rate of salty soil sub - grade is proposed.

关 键 词：盐渍土 FLAC 数值模拟 应力波 水平盐胀率 

分 类 号：U416.1[交通运输工程—道路与铁道工程]