The principle of lining repair is t

The principle of lining repair is to lining a new pipe on the inner wall of the original pipe, and the pipe diameter is smaller than the original pipe. However, due to the pipe material and other reasons, the water carrying capacity of the new pipe may not be much different from the original one. The advantage of this method is that the construction has little impact on the road traffic and other underground. But its disadvantage is that it can not achieve the expected effect when the pipeline has large dislocation and deformation. The diameter and slope of the new pipe depend entirely on the relevant characteristics of the old pipe.