Install the corrugated pipes at the positions shown on the design drawings and secure them with positioning bars. After installation, the pipes must be smooth and free of kinks.

　　All pipe joints shall have a length of 5d, connected by sleeving with a corrugated pipe one size larger, tightened symmetrically, and wrapped with adhesive tape at the joints to prevent concrete slurry from penetrating. When a conflict arises between the pipe position and non-prestressed reinforcement, the principle of giving priority to the pipe shall be adopted, and the reinforcement shall be moved appropriately to ensure the correct position of the pipe.

　　The embedded anchor bearing plate at the end of the corrugated pipe shall be perpendicular to the centerline of the duct and shall not be displaced during concrete pouring. After the corrugated pipe is installed, cover its ends to prevent water or other debris from entering.

　　During construction, personnel, machinery, and vibrators must not collide with the pipes.

　　Before pouring concrete, carefully inspect the pipes, mainly checking whether there are holes in the pipes, whether the joints are firmly connected and sealed, and whether there is any deviation in pipe position. After strict inspection confirms no issues, use an air compressor to blow out debris from the pipes and ensure they are unobstructed.