预应力锚索锚固力监测点经济高效布设方法研究

预应力锚索锚固力监测点合理布设是提高边坡稳定性监测可靠性的重要手段，在确保边坡稳定安全的同时，可最大程度上节省工程监测成本。现阶段预应力锚索锚固力监测点布设方案设计多依赖工程经验，具有很强的盲目性并且监测成本较大，尤其对于大型高陡边坡，由于挖方量和边坡加固工程量巨大，如何实现高陡边坡预应力锚索锚固力监测点经济高效布设，保证边坡安全高效监测是目前亟需解决的问题。以广东省江门市迎宾西路某高边坡为研究背景，通过研究锚索的群锚效应和锚索失效后的影响范围，确定了监测点之间的合理布设间距。构建了边坡三维模型，通过数值计算，模拟高边坡开挖全过程，由数值计算结果分析边坡开挖过程中变形失稳的潜在危险区域，进行监测点选择型布设。通过上述方法，实现了该段高陡路堑边坡预应力锚索锚固力监测点的经济高效布设。研究表明：基于群锚效应与三维数值模拟方法，提出的预应力锚索合理布设间距与开挖过程中潜在危险区域重点监测相结合的综合布设优化方案，可合理利用材料和空间、大幅节省监测成本，实现边坡的经济、高效监测。研究成果为高陡路堑边坡稳定性监测点合理布设提供了一种新的思路。

Study on Economical and Efficient Layout Method of Prestressed Anchor Cable Anchorage Monitoring Points

Reasonable layout of prestressed anchor cable anchorage monitoring points is an important means to improve the reliability of slope stability monitoring.While ensuring the stability and safety of slopes，engineering monitoring costs can be saved to the greatest extent.At present，the monitoring and layout scheme design of the prestressed anchor cable anchorage monitoring points relies on engineering experience，which has strong blindness and high monitoring cost.Especially for large-scale and high-steep slopes，due to the large amount of excavation and the amount of reinforcement work for slopes，how to realize the economical and efficient layout of prestressed anchor cable anchorage monitoring points of high-steep slope and ensuring safe and efficient monitoring of slopes is an issue that is urgently needed to be solved.Aiming at this problem， this paper takes a high slope of Yingbin West Road in Jiangmen City，Guangdong Province as the study background， and determines the reasonable layout distance between the monitoring points by studying the group anchor effect of anchor cables and the influence range of anchor cables after failure.By constructing the three-dimensional model of the slope and the numerical calculation， the whole process of high slope excavation is simulated.The potential dangerous area of deformation instability during slope excavation is analyzed by numerical calculation results， and the selective layout of monitoring points is carried out.Based on the above two methods，the economical and efficient layout of the prestressed anchor cable anchorage monitoring points of the high-steep roadside slope is realized.The study results show that based on the group anchor effect and three-dimensional numerical simulation method，the proposed comprehensive layout optimization scheme for the reasonable layout of prestressed anchor cables and the key monitoring of potential danger areas in the excavation process can rationally utilize materials and space and greatly save monitoring costs，and achieve economic and effective monitoring of slopes.The study results provide a new idea for the reasonable deployment of high-steep roadside slope stability monitoring points.