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自人民治黄以来,黄河下游两岸险工的护岸工程,由过去临时性的埽工,逐步改为永久性的石工,现已达到了全部石化,大大加强了堤防抗洪能力,护岸工程包括石坝、石垜及石护坡等,以上这些工程,在迎溜着水部分均抛有块石护根,以防冲刷淘底,影响建筑物的安全。但由于黄河河底多沙,水深溜急,每当汛期大溜顶冲或回溜冲刷之处,根石往往发生蟄塌和走失现象,有的甚为严重。历年整修险工中抛护根
Since the people started to govern the Yellow River, the revegetation works of the stranded workers on both sides of the lower Yellow River have been gradually changed from permanent temporary masons to permanent masonry and have now reached full petrification. The bank protection work has greatly enhanced the ability of embankments to resist floods. The bank protection works include rock dams, Shek Kip and stone slope protection, these projects above, in the welcome slipped part of the stones are thrown to protect the scouring bottom, affecting the safety of buildings. However, due to the sandy bottom of the Yellow River, the water depth slippage, whenever the flood season or back to the ramp slippery scouring, stoning and loss of the stone often occurs, and some very serious. Over the years renovation workers throwing care roots