Anti-blocking accumulated water drainage device for highway tunnel construction

The invention discloses an anti-blocking accumulated water drainage device for highway tunnel construction, which comprises an accumulated water drainage main pipeline, one end of the accumulated water drainage main pipeline is connected with a drainage inlet pipeline, the other end of the accumulated water drainage main pipeline is connected with a drainage outlet pipeline, the middle section of the accumulated water drainage main pipeline is provided with a drainage valve, and the drainage valve is connected with the drainage inlet pipeline. According to the accumulated water drainage device, in the accumulated water drainage process, debris such as disintegrating slag and stones are crushed into sludge, then the sludge firstly passes through the filtering pipeline and is successfully intercepted by a filtering net plate, the filtering net plate can be self-cleaned at set intervals, and therefore the filtering effect is improved, and the service life of the accumulated water drainage device is prolonged. Th