摘要
为探究边坡开挖加固时稳定性变化特征,依托公路岩质高边坡治理工程,运用MIDAS GTS建立高边坡三维模型,对开挖前及开挖不同阶段边坡的变形及稳定进行了对比分析。结果认为:经过分阶段开挖后的边坡,由于坡体自重的减小,坡体位移发展呈减弱态势,边坡整体稳定性增加;在仅采取框格梁支护后,坡体水平位移量远小于原始状态的边坡位移量,但大于坡体开挖完毕后的水平位移量;在框格梁的基础上增设预应力锚杆后,预应力锚杆的介入极大限制了边坡变形,使得坡体水平位移进一步减小;框格梁+预应力锚杆加固岩质边坡可以有效保证边坡的稳定性,建议在施工过程中加强边坡变形监测,确保工程安全。
In order to explore the characteristics of stability changes during slope excavation and reinforcement,this paper,relying on the highway high rock slope treatment project,applies MIDAS GTS to establish a three-dimensional model of high slope,and conducts a comparative analysis of slope deformation and stability before and at different stages of excavation.The results show that after the slope is excavated in different stages,because of the decrease of the self-weight of the slope,the slope displacement development is weakened and the overall stability of the slope increases.The horizontal displacement of the slope is much less than that of the original state,but more than that of the slope after the excavation.After prestressed anchor is added on the basis of frame lattice beam,the intervention of prestressed anchor greatly restricts the deformation of slope,which further reduces the horizontal displacement of slope.It is suggested to strengthen the monitoring of slope deformation during the construction process to ensure the safety of the project.
作者
陈昊
卢应发
谢鹏
陈诚
CHEN Hao;LU Yingfa;XIE Peng;CHEN Cheng(School of Civil Engin.,Architecture and Environment,Hubei Univ.of Tech.,Wuhan 430068,China;Hubei Geological Environment Station,Huangshi 435000,China)
出处
《湖北工业大学学报》
2021年第1期84-87,共4页
Journal of Hubei University of Technology
基金
国家自然科学基金面上项目(41372363)
三峡后续工作地质灾害防治项目(0001212015CC60005)。
