Construction requirements for HDPE double-wall corrugated pipe joints: after cleaning the bottom of the groove and connecting the pipes according to the length of the groove, put the pipe into the groove, and tie the mouth with a sackcloth at the end of the central separation belt to prevent debris from entering Blockage is caused in the pipe; select the fine-grained soil excavated for backfilling, or use sandy soil for backfilling. Large stones must be removed. After backfilling, manual compaction must be performed. 2 cm is appropriate, otherwise it will be shrunk by the vehicle and the water will not flow out; after the sub-base of the fill section is constructed, on the brushed slope, according to the design size of the water outlet, cast-in-place trapezoidal water outlet pads, pads The slab is poured with a shaped wooden mold, the slope is flattened before pouring, and three bamboo sticks of 25 cm long are nailed to facilitate stability.
