关键词: 锚固技术, 双锚固段, 新型锚索, 边坡加固, 足尺模型试验

Abstract: A new type anchor cable with double anchor is developed to explore endurable and anchoring effect of anchorage system in the slope of high embankment and deep cut slope. Based on its structural design, anchorage mechanism and structural characteristics, the stress model and calculation method are analyzed. The endurable and anchoring effect of the double anchor cable anchorage are analyzed through indoors contrast analysis experiments. Experimental results indicate that: (1) The outer anchorage section played an effective and dual-function anchorage role. (2) Double anchoring section system is able to effectively avoid the prestress loss caused by anchoring failure (3) Compared to the traditional cable, the new type anchorage system is able to realize self-locking function, and demonstrated characteristics of high safety, reliability. Accidents by sudden catastrophic failure of anchor cable can be effectively avoided. Thus, high effectiveness-cost ratio is realized in the long term. (4) The engineering cases show that, the failure of outside anchor head and prestress loss of free section can be effectively inhibited, when the outside solid length of Carboniferous rocks formation sandstone, mudstone and dark gray limestone, with interbedded strata are not less than 8 m, These experimental results can be used as a valuable reference for the correct analysis of the mechanism and engineering design of the new double anchor cable.

Key words: anchor technology, double anchoring, new type anchor cable, side slope reinforcement, full scale model test