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为了解用于三峡茅坪溪防护坝风化砂的长期稳定性，通过室内模拟试验，着重研究了该风化砂长期浸水和干湿循环条件对风化砂性能的影响，包括风化砂矿物成分、化学成分、颗粒级配、透水性、沉陷性和力学性能的变化。试验结果表明，经试验处理后的风化砂，其性能没有大的变化，且主要发生在试验的初期阶段，而后则迅速降低并趋于稳定。因此，风化砂的性能在工程环境中的长期稳定性较好。
In order to understand the long-term stability of the weathered sand in the Maopingxi protective dam of the Three Gorges Project, the effects of long-term immersion and wet-dry cycling conditions on weathering sand were studied through indoor simulation tests, including weathering sand mineral composition, chemical composition , Particle size distribution, water permeability, subsidence and mechanical properties. The test results show that the weathered sand after the test treatment has no significant change in its performance, and mainly occurs in the initial stage of the test, and then rapidly decreases and tends to be stable. Therefore, the long-term stability of weathering sand in the engineering environment is better.