引滦入唐是唐山市城市用水大型的引水工程 ,截止到１９９８年共引水３０ ４２５亿ｍ３,年均引水３ ０４３亿ｍ３。引滦入唐渠首以下为明挖土渠段 ,使用第二年发现第一级马道两侧排水沟和坡脚砌体开裂 ,有的预制块下滑堵塞了排水沟 ,格内抹面被顶起。１９８９年后 ,格内抹面裂缝 Water Diversion from Luan River to Tang Dynasty is a large-scale water diversion project for urban water use in Tangshan City. As of 1998, a total of 3,304.5 billion m3 of water were dumped, with an average annual water volume of 340.3 million m3. The following water diversion from the Luanhe River into the Tang dynasty was used to excavate the cannel sections. The second stage was to find that the first-level two sides of the roadway had cracks in the gutters and the slopes of the masonry. Some of the prefabricated blocks slid down to block the drainage ditches. After 1989, Ge Nei surface cracks