A prefabricated water channel and a manufacturing process

By setting micro-permeability unit zones and stabilizing structures at the bottom and sidewalls of the precast channel, the problems of leakage and uneven settlement of the precast water channel under soft soil foundation conditions are solved, achieving controlled micro-water replenishment and structural stability, and improving the channel's anti-slip ability and joint sealing.

CN122128996APending Publication Date: 2026-06-02XIAJIANG COUNTY XINGDA CEMENT COMPONENTS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAJIANG COUNTY XINGDA CEMENT COMPONENTS CO LTD
Filing Date
2026-04-21
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing prefabricated irrigation canals are difficult to balance water replenishment along the route, end-of-pipe scour control, and structural stability in short-distance water distribution and field irrigation and drainage scenarios in farmland. In particular, they are prone to leakage and uneven settlement under soft soil foundation conditions, which affects the overall stability.

Method used

Micro-infiltration unit zones are set at the bottom and/or lower sidewalls of the precast channel body. Combined with the stable flange, lower convex groove and joint outer locking structure, controlled micro-water replenishment and joint opening prevention are achieved through flow restriction, pressure equalization transition cavity and filtration protection structure, thereby enhancing structural stability.

Benefits of technology

It enables controlled micro-water replenishment along the route, reduces end-point scouring, improves the anti-sliding capacity of precast canals in soft soil foundations and the anti-pull-out capacity of joints, and ensures the overall stability and water conveyance function of the canal.

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Abstract

This invention discloses a precast irrigation canal and its manufacturing process, relating to the fields of agricultural irrigation and water conservancy engineering. The precast irrigation canal includes a precast canal body with an internal steel reinforcement frame. The bottom and / or lower sidewalls of the precast canal body are partially equipped with micro-infiltration unit zones, while the remaining areas are continuous dense concrete structures. The micro-infiltration unit zones are sequentially connected from the inside out to a flow-limiting structure, a pressure-equalizing transition cavity, and a filter protection structure, used to slowly release water from the inner cavity at a controlled rate. The outer edge of the canal bottom extends to both sides to form a stable flange with downwardly protruding toothed grooves; adjacent canal ends are provided with a plug-in limiting structure consisting of mating grooves and tenons, and an outer locking structure consisting of dovetail locking grooves and post-cast locking strips. This invention takes into account controlled micro-water replenishment along the route and mitigates the risk of joint pull-out caused by foundation settlement through a dovetail self-locking mechanism, resulting in high overall stability and an easy-to-implement manufacturing process.
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