Reverse construction method well that old and new's pipeline was linked up

The utility model provides a reverse construction method well that old and new's pipeline was linked up, includes dado, ring beam, bottom plate and access sewage pipe, the ring beam be located dado top, the bottom plate be located the below of dado, access sewage pipe and the first sewage pipe downside that is located the dado and the centre of a circle at the coplanar, its characterized in that, the dado constitute by a plurality of standard dado, standard dado placing from last down one deck. It goes along with sb. To guard him the layer to be equipped with the high pressure jet grouting pile stagnant water on the inboard dado. The bottom plate be equipped with the high compression set spouting pulp -water earth wall of 3.5 meters thicknesses. The utility model discloses beneficial effect 1. The utility model discloses engineering time is short, and is with low costs, 2. The utility model discloses execution conditions are simple, do not need large -scale retaining pile machinery.