Non-excavation and no spoil construction method for the renovation of sewer pipes, "EXP Method."

A construction method that is friendly to cities and people, which involves crushing and expanding old pipes while pushing in new pipes of the same diameter or one size larger, all without excavation and without generating waste.

This is a reconstruction promotion method that crushes and expands old pipes while pushing in new pipes of the same diameter or one rank up. A hydraulic-operated expander (diameter-expanding crusher) is inserted into the existing pipe, and new pipes are pushed into the void created by the diameter expansion and crushing, allowing for a non-excavation and soil-free construction method that is friendly to both cities and people. **Features** - Replacement with new pipes of the same diameter or larger at the same position as the existing pipes, improving flow performance. - Since the method expands and crushes the existing pipes from the inside without excavation, there is no generation of excavated soil or industrial waste. - Analysis confirms that there is no significant ground deformation affecting the surrounding soil. - It can adapt to step differences and bends at the joint sections, allowing for the replacement of deformed PVC pipes and similar with new pipes. - The use of concrete pipes, PVC pipes, and resin concrete pipes for new installations ensures high quality and durability. **Applications** - Reconstruction and extension of aging or damaged sewer pipes (Ø150–Ø600). - Strength restoration. - Improvement of water-tightness against infiltration, flow performance, corrosion resistance, and prevention of tree root intrusion. - When there is a desire to secure a larger flow capacity than the existing pipes. - When considering the replacement of existing pipes but wanting to control disposal costs.

Sewerage facilities