摘要
青藏高原是世界上最大的高海拔多年冻土区域,具有气候复杂多变、工程地质条件差、生态环境脆弱、冻土环境不稳定的区域特点。寒区公路建设常常引发边坡失稳病害,边坡支护是解决问题的关键。基于COMSOL软件中的(PDE)模块建立方程,进行二次开发,建立周期为10d的冻结模型,通过软件的二次开发,以青海省祁连山中段的冻土为例,建立冻结过程中格宾石笼挡土墙的位移场、水分场、温度场多场耦合的研究,得到格宾石笼挡土墙在高寒地区的冻结特性。基于格宾石笼挡土墙在高寒地区海拔高、低温低等气候特点,结合COMSOL数值模拟软件,建立格宾石笼挡土墙和土层的多场耦合,得到冻结过程中结冻深度为1.2m,结冻区温度为-4—-1℃,分析了冻土路堑中温度场与水分场和位移场的分布和变化规律、最大位移等数据,为高寒地区道路役性能提供了数据支撑和建议。
The Qinghai Tibet Plateau is the largest permafrost region in the world,which is characterized by complex and changeable climate,poor engineering geological conditions,fragile ecological environment and unstable permafrost environment.Highway construction in cold regions often leads to slope instability diseases,and slope support is the key to solving the problem.This article is based on the(PDE)module in COMSOL software to establish equations and conduct secondary development.A freezing model with a period of 10 days is established.Through secondary development of the software,taking the frozen soil in the middle section of Qilian Mountains in Qinghai Province as an example,the displacement field,water separation field,and temperature field coupling of the Gebin retaining wall during the freezing process are studied,and the freezing characteristics of the Gebin retaining wall in high-cold areas are obtained.Based on the climate characteristics of high altitude and low temperature of Gebin retaining wall in high and cold regions.This article combines the COMSOL numerical simulation software to establish a multi field coupling between the Gebin retaining wall and soil layer,and obtains data such as a freezing depth of 1.2m,a temperature of-4--1℃in the freezing zone,and maximum displacement during the freezing process.This provides data support and suggestions for the road service performance in high-cold areas.Analyze the distribution and variation patterns of temperature field,water content field,and displacement field in frozen soil cutting.
作者
王欣
房建宏
徐安花
明峰
Wang Xin;Fang Jianhong;Xu Anhua;Ming Feng(Qinghai University,Xining 810016,China;Qinghai Institute of Transportation Science,Xining 810016,China;Qinghai Communication Techical College,Xining 810016,China;Northwest Institute of Ecological Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China)
出处
《青海交通科技》
2023年第2期154-158,共5页
Qinghai Transportation Science and Technology
作者简介
王欣(1997—),男,硕士,主要研究方向:交通岩土。
