某膨胀土挖方边坡的综合处治

COMPREHENSIVE TREATMENT TECHNIQUE OF A CUT SLOPE IN EXPANSIVE SOILS AREA

结合膨胀土挖方边坡治理实例,对包括膨胀土边坡支护理念问题、膨胀土强度取值问题、边坡稳定性分析及优化设计问题、扩底锚杆工艺及其试验研究问题、坡面防护问题等进行研究,其中对膨胀土地层扩底锚杆试验研究表明,浇筑完毕后未经降雨影响的试验锚杆,扩底锚杆比非扩底锚杆锚固力提高不多;但降雨浸泡后,非扩底锚杆锚固力会大幅度下降,扩底锚杆锚固力下降不明显,说明扩底锚杆在膨胀土地层中的应用是成功的。

The relative researches are carried out with a case of cut slope treatment engineering of expansive soils. It is involved that the shoring idea of expansive soils slope, the strength value of expansive soils, the slope stability analysis and its optimizing design, the technics of anchor bar with expanding root and its test study, the protection of sloping surface, and so on. And the anchor bar with expanding root test study indicated in expansive soils area that anchorage forces of the expanding roots are not obviously different from the those of non-expanding roots when the tests has been done before raining, but after raining the non-expanding roots＇ anchorage force will decrease to a large extent but the expanding roots＇ decreasing extent is little. Such data indicates that the applications of anchored bars with expanding roots in expansive soils are successful.