冰碛物滑坡中的锚固工程试验

Experimental Investigation of Anchorage Engineering on Glacial Till Slope

冰碛为冰川搬运和堆积的松散物质,发育在其上的公路滑坡较为少见,缺少相关经验与试验数据。作者考察研究了国内外关于堆积层滑坡的治理现状,结合锚固工程界专家提出的锚固工程研究方向,在现场贴片锚固试验的基础上,对发育在冰碛物上的滑坡体锚固工程进行了专题研究,综合考虑不同锚索型式、不同锚索锚固段长度、不同张拉吨位对锚索锚固段应力分布规律的影响,得出了适用于冰碛物滑坡的锚固试验结论,经过综合比选推荐了一种适用的锚索锚固型式。并结合试验结果通过有限元试算,提出了适宜的建模边界条件。

Moraine is the unconsolidated deposits by glacial transport and accumulation. There＇ s only several highway-slope developed on these matter. Correlative experiences and test datum are very scarcity about this. The author reviewed the present status of deposits＇ fathering methods. Combined with the research aspect next years of anchorage engineering lodged by some experts, based on the anchorage test, which the main idea is gluing strain foil, the special study on anchorage engineering has been done on glacial till slope. Take into account the different type, length and prestressing of the anchor line, put forward the anchorage test conclusion on glacial till slope such as the stress distribution rule along anchorage length. An in point type of the anchor line has been recommended. At last, combined with the test results, a proper modelling boundary condition is given by FEM pilot calculation.