摘要
路堑高边坡进行施工时,为了防止开挖扰动土体引起滑坡、崩塌等地质灾害,必须对高边坡进行及时支护。锚固台车+开槽框架梁安装综合作业车的全机械作业适用于易滑坡及危岩边坡锚固工程,无需现场筑模和浇筑,能够及时对开挖岩土体进行支护。本文以深汕西高速公路路堑边坡为研究对象,使用快速拉格朗日差分软件FLAC3D计算边坡开挖时的变形。模拟结果表明,及时施加支护有效降低了坡面的位移,减缓了岩土体隆起、向坡底滑移的趋势。相较于传统的浇筑法支护,机械化快速施加框架梁+锚杆(索)支护省去了浇筑混凝土凝固并产生强度的时间,显著增强了边坡的稳定性。
In order to prevent geological disasters such as landslide and collapse caused by excavation disturbance,timely support must be carried out during construction of high cutting slope.The all-mechanical operation using the anchoring truck+slotted frame beam installation integrated operation truck is suitable for the anchoring project of landslide-prone and dangerous rock slope.These operations do not requires on-site formwork and concrete pouring,and can support the excavated rock and soil mass in time.In this paper,taking the cutting slope of Shenzhen-Shantou West Expressway as the research object,the deformations of the slope during excavation was calculated by using the fast Lagrange difference software FLAC3D.The simulation results showed that timely application of support can effectively reduce slope displacement,and slow down the uplift and sliding trend of rock and soil masses to the slope bottom.Compared with traditional concrete pouring support method,the rapid mechanical application of frame beam+anchor rod(cable)support construction saves the time required for concrete curing and strength development,and significantly enhances the stability of slope.
作者
崔树坚
刘敏
周书剑
CUI Shujian;LIU Min;ZHOU Shujian(Guangdong Provincial Expressway Development Co.,Ltd.,Guangzhou Guangdong 510623,China;China Railway 14th Bureau Group First Engineering Development Co.,Ltd.,Jinan Shandong 276800,China)
出处
《广东公路交通》
2024年第5期23-29,共7页
Guangdong Highway Communications
基金
广东省科技厅计划项目“高速公路改扩建工程快速安全建设关键技术研究”(2021B1111610002)。
关键词
边坡稳定性
机械化施工
FLAC3D
数值模拟
锚杆
分级开挖
slope stability
mechanical construction
FLAC3D
numerical simulation
anchor rod
staged excavation
