The invention relates to a mole sand lifting type automatic sand draining and silty sand effective utilizing device and belongs to the field of water conservancy project operation management. The device comprises sand flushing channels with the open tops, a slide rail and beam frame, rubber belts, a sand lifting drive car, a traction mechanism and an outlet control valve, wherein the slide rail and beam frame is composed of slide rails and cross beams; the sand flushing channels are arranged at the bottom of a reservoir or a trench or a sand basin, the cross section of each sand flushing channel is a composite cross section composed of vertical side walls on the two sides and a semicircle bottom or a trapezoid bottom, and the tops of the sand flushing channels are covered with the rubber belts to form a closed runner; the slide rail and beam frame is fixed to the tops of the sand flushing channels; the rubber belts are inlaid on the slide rail and beam frame and cover the sand flushing channels and the sand lifting drive car; the sand lifting drive car is located on the slide rails and can lift the rubber belts to drain sand wherever; the traction mechanism drives the sand lifting drive car to move on the slide rails in a reciprocating mode; and the outlet control valve penetrates through the bottom of a dam. The sand draining process of the device is similar to the mole sand lifting process, automatic sand drainage is achieved through the channel fall, energy is saved, the building and operating cost is low, and silty sand is effectively utilized.

Mole sand lifting type automatic sand draining and silty sand effective utilizing device

A multi-stage pore pipe weir shunting silting method comprises the following steps: 1, a water diversion channel is excavated in the upstream of a region to be silted of a river main tank to reach a dike root depression silt falling region, and an included angle between the axis of the water diversion channel and the water flow direction of the river main tank is an acute angle; 2, a drainage channel is excavated to the depression silt falling area of the embankment at the downstream of the to-be-silted area of the river main tank, and an included angle between the axis of the drainage channeland the water flow direction of the river main tank is an acute angle; 3, a plurality of rows of hole pipe weirs are arranged at intervals in the depression silt falling area of the embankment root along the direction of the embankment, wherein each row of hole pipe weirs are transversely arranged along the silt falling area of the embankment root; in the depression silt falling area of the embankment root, the hole pipe weirs located on the upstream side of the diversion channel and the downstream side of the drainage channel form a water-impermeable hole pipe weir through water-impermeablevertical pipes, the rest hole pipe weirs form a water-permeable hole pipe weir through water-permeable vertical pipes, and water passing holes are formed in the pipe walls of the upstream face and thedownstream face of each water-permeable vertical pipe. The low-lying area of the embankment root is raised through high-sand-content river water deposition, water is used for controlling water, and the purposes of preventing river downstream embankment from being endangered and preventing flood safety are achieved.

Multi-stage pore pipe weir shunting silting method

The invention provides a siltation reduction system for a reservoir, relates to a general water conservancy project, and in particular to system engineering for reducing siltation of the reservoir of heavily silt-carrying rivers. The IPC (International Patient Classification) of the siltation reduction system is No. E02B1/00 and No. E02B9/02. According to the system, a submerged sediment control dam is built in the reservoir to divide the reservoir into a clear water reservoir region and a muddy water reservoir region, a sand conveying culvert is adopted to discharge water flow containing sand far away from the upstream of the dam out of the reservoir, dual purposes of water storage of the reservoir and sand discharging are achieved, and the reservoir precipitation erosion distance is widened; tiny particle silt turning over the submerged sediment control dam to the reservoir region before the dam is discharged out of the reservoir through dam flood discharging tunnels in a submersible sand pump reservoir dredging manner; and for wide, shallow and curved deposition forms in the watercourses of the reservoir regions, smooth and straight reservoir river channels beneficial to density flow transport are built in a submersible sand pump sand-excavating dredging manner, and the natural sand discharging effect is improved. The siltation reduction system is suitable for heavily silt-carrying river reservoir building and deposited waste reservoir reformation engineering.

Fu You

Papers

Siltation reduction system for reservoir