Excavate the foundation pit, pad the foundation, lay a good foundation, lower the reinforced concrete pipe, then do a good job of protecting the pipe (if there is one in the design drawing) and foam tape (or treat the pipe joint with waterproof material), then backfill the permeable material (sand or graded gravel) and tamp it to make the entrance I-shaped wall.
If the temporary drainage pipe is easy, it needs to be excavated, laid and backfilled (50cm or more).