黄土地区深挖路堑边坡稳定性研究
A Study of the Stability of the Side Slope of a Deep Cut in a Loess Region
  
中文关键词:黄土地区  路堑  边坡  安全系数  爆破荷载  安全振速
英文关键词:loess region  cutting  side slope  safety coefficient  blasting load  safe vibration velocity
基金项目:
作者单位
杨涛 中铁十六局集团铁运工程有限公司河北高碑店030032 
王超 中铁十六局集团铁运工程有限公司河北高碑店030032 
瞿波 中铁十六局集团铁运工程有限公司河北高碑店030032 
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中文摘要:
      为研究路堑边坡在开挖过程中的稳定状况,以便进行施工期边坡稳定性控制,防止事故的发生,建立路基有限元模型,采用数值仿真方法对边坡开挖过程进行模拟。分析了开挖过程中边坡变形及坡体内部应力的变化规律及边坡的稳定状态;选取最高边坡断面作为研究对象,分析了爆破振动对边坡稳定性的影响。研究结果表明:边坡开挖完成后,左侧边坡安全系数为1.19,右侧边坡安全系数为1.35,满足规范要求;边坡的坡脚水平方向安全振速为10.1 cm/s,采用设计爆破方案进行施工可以保证边坡稳定。
英文摘要:
      In order to study the stability of the side slope of the cutting during excavation to facilitate the control of the stability of the side slope during construction and prevent accidents from happening, a finite element model is established for the subgrade in the present paper, upon the basis of which the excavation process for the side slope is simulated by the numerical simulation method, with the variation law of the deformation, internal stress and stability of the side slope during excavation analyzed. With the highest cross section of the side slope chosen as the object of our research, the influence of blasting vibration on the stability of the side slope is analyzed. 〖JP2〗The result of our research shows that the safety coefficient of the left side slope is 1.19, 〖JP〗and the safety coefficient of the right side slope is 1.35 after the slope excavation, both of which are found to be able to meet the requirements of the technical specifications; the safe vibration speed of the slope foot of the side slope is 10.1 cm/s. The stability of the side slope can be ensured with the designed blasting scheme adopted for the construction of the project.
杨涛,王超,瞿波.黄土地区深挖路堑边坡稳定性研究[J].国防交通工程与技术,2019,17(6):49~52
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