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大功灌区输水渠道相当一部分属于沙质土填方工程,渠道渗水损失较大,群众乱扒口、决口现象严重,工程效益得不到应有的发挥。在工程配套建设中,对部分险工地段进行了衬砌硬化,但据近几年的运用情况,衬砌硬化存在着不少问题。其一,冬季冻胀破坏严重。目前所有的衬砌硬化渠段均遭到了不同程度的冻胀破坏及风化。其二,防人为破坏
A considerable part of the Dagong irrigation water supply channel belongs to the sandy soil filling project, and the water loss of the canal is relatively large. The masses are chaotically pulled out of the mouth. The phenomenon of the burst mouth is serious and the engineering benefit can not be given due consideration. In supporting the construction of the project, some of the dangerous sections were lining hardened, but according to the application in recent years, lining hardening has many problems. First, severe frost heaving damage in winter. At present, all the lining hardened sections have been subjected to different degrees of frost heaving damage and weathering. Second, anti-human damage