衬砌维修的原理是在原管的内壁上衬砌新管，管径小于原管。但是，由于管道材

Lining the maintenance of the principle is the new pipe lining on the inner wall of the original pipe, tube diameter smaller than the original. However, because of piping materials, the carrying capacity of the new pipeline might not have much difference with the original drainage capacity. The advantage of this method of construction is little traffic impact on road traffic and other underground. But its drawback is that, when there is a large displacement and deformation of the pipeline, can not achieve the desired results. The new pipeline diameter and slope depends entirely on the relevant characteristics of the old pipe.

The principle of lining maintenance is to lay a new tube on the inner wall of the original pipe, which is smaller than the original tube. However, due to pipe material and other reasons, the carrying capacity of the new pipe may not be much different from the original drainage capacity. The advantage of this method is that the construction has little effect on road traffic and other underground traffic. However, the disadvantage is that when the pipe has a large dislocation and deformation, it can not achieve the desired effect. The diameter and slope of the new pipe depend entirely on the characteristics of the old pipe.

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