路基高边坡锚杆组合支护防滑移施工技术  

Construction Technology for Anti-slip and Moving of High Slope Anchor Rod Combination Support in Roadbed

作　　者：鲜超 王朝齐 XIAN Chao;WANG Chao-qi(CCCC Road and Bridge Construction Co.,Ltd.,Beijing 100000,China)

机构地区：[1]中交路桥建设有限公司,北京100000

出　　处：《价值工程》2024年第12期114-117,共4页Value Engineering

摘　　要：为了改善山区或多雨地区公路高边坡工程中经常出现山体滑坡、滑移等地质灾害的情况,设计一种路基高边坡锚杆组合支护防滑移施工技术。进行路基高边坡稳定性计算,使用圆弧法模拟路基高边坡的滑移状态,获取边坡的稳定系数,设计锚杆组合支护模型,采用MC模型来描述土体和延时的剪切破坏,计算支护施工过程中的相关参数,设计预应力锚索框架梁支护防滑移施工技术流程。在某工程实例中对设计的施工技术进行性能验证,实例分析结果表明:不同锚杆位置下,变严重的初期三处平均形变仍然可以控制在14mm/d以内。一月内整体的平均累计变化量为106。8mm;不同锚杆深度下,随着深度增加,锚固力呈现下降趋势,锚杆顶部受拉力较大,锚杆深度形变较小,整体平衡稳定,达到持续支护作用。负荷路基高边坡的使用要求,验证了施工技术的可行性。In order to improve the geological disasters such as landslides and slippage which often occur in highway high slope engineering in mountainous or rainy areas,a combination of anchor rod support and anti slip construction technology for roadbed high slope is designed.The stability of the high slope of the roadbed is calculated,the circular arc method is used to simulate the sliding state of the high slope of the roadbed,to obtain the stability coefficient of the slope.An anchor rod combination support model is designed,the MC model is used to describe the shear failure of the soil and delay,and the relevant parameters during the support construction process are calculated,the pre-stressed anchor cable frame beam support anti slip construction technology process is designed.In a certain engineering example,the performance verification of the designed construction technology was carried out.The analysis results of the example showed that under different anchor rod positions,the average deformation at the initial three points that became severe can still be controlled within 14 mm/d.The overall average cumulative change within a month is 106.8mm.At different depths of anchor rods,as the depth increases,the anchoring force shows a decreasing trend.The top of the anchor rod is subjected to greater tension,while the depth deformation of the anchor rod is smaller.The overall balance and stability are achieved,achieving a sustained support effect.The requirements for the use of high slopes in load bearing roadbeds have verified the feasibility of construction techniques.

关 键 词：路基高边坡 锚杆组合支护 防滑移 MC模型 

分 类 号：U416.1[交通运输工程—道路与铁道工程]