预应力锚索技术在岩质边坡治理的应用  

Application of Prestressed Anchor Cable Technology for in a Rock Slope Treatment

作　　者：左亚淮 ZUO Yahuai(Geo-engineering Investigation Institute of Jiangsu Province)

机构地区：[1]江苏省地质工程勘察院,江苏省南京市210000

出　　处：《现代矿业》2023年第11期98-102,115,共6页Modern Mining

摘　　要：边坡治理是岩土工程中极为关键的部分,因此研究基于预应力锚索的岩土边坡治理技术十分必要。针对所研究区域收集基本情况和岩质边坡的几何参数,计算预应力锚索的数量和长度,并根据计算结果在岩质边坡设置预应力锚索。将预应力锚索张拉数据与岩质边坡的几何参数输入到FLAC^(3D)软件中,分析加固前后岩质边坡位移变化,在不同平台宽度、不同锚固角、不同锚固力和地震荷载下岩质边坡加固后的稳定性。试验结果显示,使用预应力锚索加固岩质边坡后,边坡的塑性应变以及X、Y方向的位移均发生明显减小。同时平台宽度较大,锚固角为0°,锚固力900 kN时,岩质边坡的位移最小,加固效果最佳。使用预应力锚索加固岩质边坡后,即使在地震荷载影响下仍然具有较小位移变化,说明预应力锚索能够有效治理岩质边坡。The slope treatment is a very key part of geotechnical engineering.Therefore,the treatment technology of rock and soil slope based on prestressed anchor cable is studied.The basic information and geometric parameters of rock slope were collected for the study area,the number and length of prestressed anchor cables were calculated,and the prestressed anchor cables were installed in the rock slope according to the calculated results.The prestressed cable tension data and geometric parameters of the rock slope were input into FLAC3D software to analyze the displacement changes of the rock slope before and after reinforcement,as well as the stability of the rock slope after reinforcement under different platform widths,different anchorage angles,different anchorage forces and seismic loads.The test results show that the plastic strain of the rock slope and the displacement in X and Y directions decrease obviously after the prestressed anchor cable is used to strengthen the rock slope,At the same time,when the platform width is large,the anchoring angle is 0°and the anchoring force is 900 kN,the displacement of the rock slope is minimum and the reinforcement effect is the best.When the prestressed anchor cable is used to strengthen the rock slope,it still has a small displacement change even under the influence of seismic load,which indicates that the prestressed anchor cable can effectively control the rock slope.

关 键 词：预应力锚索 岩质边坡 FLAC^(3D)软件 锚固角 锚固力 

分 类 号：TU45[建筑科学—岩土工程]