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边坡加固技术是工程界一直关注的重要课题,边坡开挖后坡体内应力调整和位移变化的复杂性,对加固技术有了新的要求,而在此方面国内起步较晚,且多数采用拉力(分散)型锚索对岩土体实施预加力。经过大量实验结果表明,在破碎岩体、土体中,当锚索长度大于8～10m后,拉力分散型锚索的承载力无法获取较高的锚固力,而压力分散型锚索的受力性能不仅合理,而且在破碎岩体、土体地层中能够提供较高的承载力,本文结合哈西车站深路堑边坡支挡实践,简要介绍压力分散型锚索受力原理及锚索设计。
Slope reinforcement technology has been an important issue that engineering has always been concerned with. The complexity of stress adjustment and displacement change in slope after slope excavation has new requirements for reinforcement technology. However, in this respect, China started late, Rally (dispersion) -type anchor cable to prestress rock and soil. After a large number of experimental results show that in the broken rock, soil, when the length of the anchor cable is more than 8 ~ 10m, the bearing capacity of the dispersion-type anchor cable can not obtain a high anchorage force, while the stress-dispersion type anchor cable force The performance is not only reasonable but also can provide high bearing capacity in broken rock mass and soil strata. Combined with the practice of deep-cut slope supporting in Hasi Station, this paper briefly introduces the principle of stress distribution of anchor cable and the design of anchor cable.