The strengthening method of digging groove and increasing hidden beam is proposed by combining an actual project, which avoids all of demolition and restitution.
结合实际工程，提出了开槽设暗梁的楼板加固方法，避免了全部拆除重建。
When sand sinking pools are full and lose efficacy, the method of "digging out sands to wait for deposition" can increase the life of irrigation region.
当沉沙池淤满，失去自流沉沙作用时，采用“以挖待沉”可以延长灌区运行年限，但没有扬水沉沙方案优越。
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