Flood drainage system sealing structure with the function of draining underground spring water and tailings seepage

Abstract

A flood drainage system blockage structure with an underground spring water and tailing seeping water drainage function comprises an upstream blockage structure and a downstream blockage structure. The upstream blockage structure comprises a chute, gaps are reserved between cover plates of the chute, the gaps are filled with non-woven geotechnical cloth I, and a concrete block is arranged at the inlet section of the chute. The downstream blockage structure comprises a culvert pipe, a concrete retaining wall is arranged at the outlet end of the culvert pipe, a concrete cover plate is arranged above the concrete retaining wall, a cement mortar plastering layer is arranged on one side face of the upstream side of the concrete retaining wall, and the concrete retaining wall is provided with an observation hole, an overflow hole and a sand washing hole; a grit chamber is arranged on the upstream side of the concrete retaining wall, a water passing area is located on the grit chamber, a concrete bottom plate is arranged at the bottom of the grit chamber, and the upper surface of the concrete bottom plate is a bevel. A second geotechnical cloth plug is arranged in the overflow hole, and a first geotechnical cloth plug is arranged at the inlet end of the sand washing hole. According to the flood drainage system blockage structure, flood cannot pass, but underground spring water and tailing seeping water can pass, no sand is leaked, construction quantity is small, cost is low, and construction period scheduling is flexible.

Description

technical field [0001] The invention relates to a plugging structure for a flood discharge system of a tailings pond, in particular to a plugging structure for a flood discharge system of a tailings pond with the function of discharging underground spring water and seepage of tailings. Background technique [0002] The flood drainage system is one of the key structures of the tailings pond. It is generally composed of water intake structures and drainage structures. The water intake structures are generally drainage wells or chutes, and the drainage structures are generally tunnels, chutes or culverts. When the service period of the flood drainage system is over and it is proved that it will no longer be used, the original flood drainage system must be blocked after the new flood drainage system is completed and put into use to end its discharge capacity and prevent it from becoming a tailings leakage channel . [0003] The sealing structure of the traditional flood drainag...

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Problems solved by technology

[0004] These two traditional sealing methods, no matter they are flexible or rigid, have three common problems. "Overwater" is based on "tight blockage", and eventually all the drainage functions of the original flood drainage system were abandoned, resulting in the seepage of tailings in the reservoir and underground spring water that could not be drained away by the flood drainage system, and were left in the In the reservoir, it can only be discharged through other flood drainage systems or seepage drainage systems; second, the chute line is long. According to the traditional thinking of "one overall sealing structure", whether it is flexible sealing or rigid sealing, The engineering volume is relatively large, the construction of sand washing and rolling stones is difficult, the fluidity is small, and the waste water is more, especially the cost of rigid plugging and grouting is relatively high; third, "tight sealing" is an ideal state. , because the structure is divided into two independent parts, the side wall tube bottom and the cover top, and there are cracks between the cover plates, so its integrity itself is worse than other structures, and it is easily deformed and broken by external loads and uneven foundation settlement. , the flexible sealing material itself is difficult to fit tightly with the pipe wall; and for rigid sealing, due to the limitation of engineering quantity and engineering cost, the grouting is often not dense

These all lead to the flow of water flowing into the gap between the chute wall and the plugging body, which may form a strip-shaped high-pressure body starting from the water-facing surface of the plugging body, forming a high-pressure penetration from the inside to the outside of the chute wall and surrounding tailings. It is easy to cause seepage damage to the surrounding tailings accumulation

[0005] In addition, the sealing structure of the traditional flood drainage system is an integral sealing structure, and the construction must have a sequence, which is often carried out from the bottom to the top.

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