Proposed construction technology
（1）of reserved paste type, reserved on the seal groove to be placed first in concrete (in the template nail sticks aside).
（2）The surface of the pre cast concrete is removed after the template, the seam surface water, clean, no debris。
(3)It will seal embedded preformed groove. If not reserve tank, the vertical joints can be added with adhesive paste or cement nail length, with wooden fixed seal; on the horizontal seam can be directly pasted on the concrete surface.
(4)seal paste after pouring concrete should as soon as possible。
(5) installed in the paste process, should prevent water pollution and water, so as not to affect the use effect。