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岩土预应力锚索被广泛应用于高边坡加固工程中,作为一种深埋于地下的高应力结构,其工作环境中存在着一些以水为载体的腐蚀性介质,加之张拉力的波动变化等因素影响,其自由段及内锚固段均存在着长期耐久性问题。基于实际边坡锚固工程预应力监测数据及室内试验成果,深入分析了影响预应力锚固结构长期耐久性的各种因素,并提出了可能影响其服役寿命的决定性因素。在此基础上,进行了单根锚索失效特性的现场试验及数值模拟研究,分析了单锚失效对岩土体位移场、应力场及邻近锚索张拉力的影响,研究成果可为在役锚固工程长期安全性控制对策的制定提供依据。
As a kind of high-stress structure deeply buried in the ground, the prestressed anchor cable is widely used in the reinforcement of high slopes. There are some corrosive media with water as the carrier in its working environment. Combined with the fluctuation of the tension Changes and other factors, both the free section and the anchor section there are long-term durability problems. Based on the actual monitoring data of prestressed anchorage engineering in slope and the laboratory test results, various factors affecting the long-term durability of the prestressed anchorage structure are deeply analyzed, and the decisive factors that may affect its service life are proposed. On this basis, the field test and numerical simulation of the failure characteristics of single anchor are carried out. The effects of single anchor failure on the displacement field and stress field of rock mass and the tension of adjacent anchor cable are analyzed. The research results can be in service Anchoring engineering long-term safety control measures to provide the basis for the formulation.