Abstract: The main dam of Qingfengling reservoir is designed as core shell sand dam, and some problems caused by construction material exist here. In main dam rehabilitation project, the test of reinforced dam shell material and research on dam stability were carried out, including the key issues in rehabilitation process such as optimization of dam material, choice of reinforcement ratio, application of anti-seepage measures and et al. Furthermore, the key points as mechanical characteristic of geogrid, reinforcement calculation, the determination of layers, length of geogrid were studied in details. The application result showed that it was of very good effect and worthy popularization.

摘要： 青峰岭水库主坝为宽心墙砂壳坝，存在着由于筑坝材料引起的坝体质量问题。在水库除险加固时，水库管理处进行了加筋土石坝坝壳料试验及坝体稳定性研究，对土石坝除险加固中的关键问题即筑坝材料的优化、土工格栅加筋率的合理选择、防渗综合措施等展开研究，对土工格栅工程的力学特性及坝体中土工格栅加筋设计的加筋率计算、加筋层数的确定、筋材长度等关键技术问题进行了详细研究，并得到试验应用，收到了较好的效果。