库区陡峻土质岸坡路基塌岸预测

Prediction of embankment failure of steep soil in slopes reservoir areas

对山区顺直陡峻岸坡路基塌岸的预测,与普通图解法比较,采用考虑土体内聚力的图解法可有效避免解算难以收敛的问题,更为符合塌岸的真实形态。通过预测实例的分析发现:天然休止角的提高可大幅减小塌岸范围;水下磨蚀角的提高则可有效减小塌岸深度;合理调节运行水位变幅,对控制塌岸范围和深度较为理想;而通过小范围抬高公路线位来控制塌岸的效果并不明显。对塌岸影响因素的深入分析,为塌岸段路基的治理提供了合理的思路。

To predict embankment failure of steep soil slopes in reservoir areas, a result using the diagram method considering cohesive can be more closer to the fact than usual way. Through a example, a conclusion was drew, that the increasing of soil friction angle or reducing the range of water level can contribute to a greatly improvement of embankment＇ s ability to against collapse. However, elevating highways zone was not obvious effective to resist collapse. A full analysis of the concerning factors about embankment collapse, can provide renovation a rational approach.