Flood drainage structure of high-fill channel type waste slag yard

Abstract

The utility model discloses a flood drainage structure of a high-fill channel type waste slag field, which comprises a bottom flood drainage project arranged on one side of the bottom of a channel, the bottom flood drainage project comprises a steel corrugated pipe, the upper part of the steel corrugated pipe adopts a perforated type, the perforated part of the steel corrugated pipe is a perforated steel corrugated pipe, and the perforated part of the steel corrugated pipe is a perforated steel corrugated pipe. The outside of the steel corrugated pipe with the holes is wrapped with geotechnical cloth, the top of the steel corrugated pipe and the two sides of a pipe body are provided with backfill gravel soil, and the bottom of the steel corrugated pipe is backfilled with a cushion layer. According to the utility model, less slag is piled in the construction period, the channel flood is less, the construction is simple, the slag is piled stably, the slag disposal site can be quickly put into use, the construction period is shortened, the investment is saved, and the safe and stable operation of the slag disposal site is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of soil and water conservation, and particularly relates to a flood drainage structure for a high-fill channel-type waste dump. Background Technique

[0002] A channel-type waste dump refers to a waste disposal measure in which waste is piled up in a channel, and the waste pile completely or partially fills the channel. For a channel-type waste dump, common flood drainage facilities include building flood drainage open channels on both sides of the mountain body at the top of the waste pile or building flood drainage culverts at the bottom.

[0003] For the method of building flood drainage open channels on both sides of the mountain body at the top of the waste pile, during the actual construction process, often due to limited terrain conditions, adverse geological conditions, traffic conditions and other factors, it is impossible to complete the construction of the flood drainage open channel before waste piling. Then, during the waste piling process, the upstream water inflow cannot be drained to the downstream of the waste dump, resulting in soil and water loss and even threatening the safety of the waste dump. On the other hand, since the actual waste volume of the project is often different from the designed waste volume, and the waste piling range is also inconsistent, then the flood drainage open channel built based on the designed waste dump range will also lead to the situation that the flood drainage open channel is buried by waste or is too far from the top of the waste pile due to the inconsistent waste piling range. Therefore, for a channel-type waste dump, the flood drainage open channel at the top of the waste pile is only suitable for implementation after waste piling, and is used to drain the later-stage flood of the waste dump. During the waste piling period (construction period) of the waste dump, additional flood drainage projects need to be arranged.

[0004] At present, the commonly used flood drainage project during the construction period is to arrange a concrete flood drainage box culvert or a flood drainage culvert at the bottom of the channel. In this way, due to a large amount of waste piled up on the upper part of the high-fill waste dump, the flood drainage building is subjected to a large filling load, and the pressure at the bottom of its foundation is also large. At the same time, due to the uneven distribution of the foundation of the mountain structure, the foundation bearing capacity of some sections may be low. Therefore, the stress and deformation characteristics of the building are very complex, and it is easy to cause problems such as stress concentration and uneven settlement of the building, resulting in phenomena such as cracking of the building and excessive foundation settlement. In order to cope with the excessive earth pressure and uneven foundation bearing capacity caused by high filling, it is often necessary to increase the structural size of the bottom building and the amount of steel bars, and the cost is relatively high. In addition, combined with the actual situation of most projects, at the initial stage of construction, the traffic road has not been built to the waste dump, and the supporting facilities such as the concrete mixing system and the sand and gravel processing system are not perfect enough. However, the waste dump often needs to be put into use at the initial stage of construction, and it is also difficult to construct a flood drainage project that requires a large amount of concrete before waste piling.

[0005] Therefore, how to solve the problems of waste piling and flood drainage for a high-fill, large catchment area and perennial flowing water channel-type waste dump, and at the same time ensure that the waste dump can be quickly put into use, shorten the construction period and save investment, and ensure the safe and stable operation of the waste dump is an urgent problem to be solved. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a flood drainage structure for a high-fill channel-type waste dump, with less slag accumulation during the construction period, smaller channel floods, simple construction, stable slag accumulation, which can ensure that the waste dump can be quickly put into use, shorten the construction period and save investment, and ensure the safe and stable operation of the waste dump.

[0007] To achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0008] A flood drainage structure for a high-fill channel-type waste dump, the bottom flood drainage project includes a steel corrugated pipe, the upper part of the steel corrugated pipe adopts a perforated type, the perforated part of the steel corrugated pipe is a perforated steel corrugated pipe, the outside of the perforated steel corrugated pipe is wrapped with geotextile, the top and both sides of the pipe body of the steel corrugated pipe are filled with backfill crushed stone soil, and the bottom of the steel corrugated pipe is filled with a cushion layer.

[0009] Preferably, the perforated steel corrugated pipe should be higher than the highest water surface line inside the pipe, the aperture d = 1 cm to 3 cm, and the row spacing L between holes = 10 cm to 0.25D.

[0010] Preferably, the backfill of crushed stone soil on both sides of the steel corrugated pipe should be carried out simultaneously, the compaction drop should be less than 30 cm, and the slope ratio of the backfill slope around the pipe is 1:X, where X ≥ 1.

[0011] The beneficial effects of the present utility model are as follows: less slag accumulation during the construction period, smaller channel floods, simple construction, stable slag accumulation, which can ensure that the waste dump can be quickly put into use, shorten the construction period and save investment, ensure the overall stability of the waste dump and smooth flood drainage, and ensure the safe operation of the project. Description of the Drawings

[0012] Figure 1 It is a schematic cross-section diagram of staged slag accumulation.

[0013] Figure 2 It is a schematic cross-section diagram of the temporary flood drainage project.

[0014] Figure 3 It is a sectional view of the temporary flood drainage project taken along the line A-A.

[0015] Figure 4 It is a schematic diagram of the perforated part of the steel corrugated pipe.

[0016] Among them, a, the first-stage slag accumulation; b, the second-stage slag accumulation; 1, the bottom flood drainage project; 2, the covering with a dense mesh; 3, the steel corrugated pipe; 4, the perforated steel corrugated pipe; 5, the geotextile; 6, the backfill crushed stone soil; 7, the cushion layer; d, the aperture; L, the row spacing between holes. Specific Embodiments

[0017] To make the purpose, technical solution and advantages of the present utility model clearer, the technical solution of the present utility model will be clearly and completely described below in conjunction with the drawings of the present utility model.

[0018] As shown Figures 1 - 4 in the figure, a flood drainage structure for a high-fill channel-type waste dump adopts a two-stage waste stacking scheme. According to the principle of "blocking first and then discharging", before discharging the waste, the bottom flood drainage project 1 (i.e., the culvert pipe at the bottom of the slag) at the bottom of the channel is built first, and then the first-stage waste stacking a starts. The slope ratio of the waste stacking is not steeper than 1:Y, where Y≥1.75, and a berm is set every 10 meters, with the berm width E, where E≥2m. After the first-stage waste stacking is completed, a top flood drainage open channel is built on the top of the first-stage waste stacking to drain the flood water upstream of the channel, and then the second-stage waste stacking b on the other side of the channel is completed.

[0019] For waste dumps with extremely high fills, a two-stage waste stacking scheme is adopted to prevent the high earth pressure from damaging the flood drainage culvert pipe.

[0020] A close-mesh net covering 2 is installed on the slope of the first-stage waste stacking a. The close-mesh net covering 2 is a temporary protection measure, and its main functions are to block the wind and inhibit the flying of waste, and at the same time, it can also play multiple functions such as sun protection, cooling, and moisture preservation. The specification of the close-mesh net is not less than 1200 meshes.

[0021] The bottom flood drainage project 1 is arranged on one side of the bottom of the channel. The bottom flood drainage project 1 includes a steel corrugated pipe 3, a geotextile 5, backfilled crushed stone soil 6, and a cushion layer 7. The perforated part of the steel corrugated pipe 3 is a perforated steel corrugated pipe 4. The outside of the perforated steel corrugated pipe 4 is wrapped with a layer of geotextile 5. Backfilled crushed stone soil 6 is set on the top and both sides of the pipe body of the steel corrugated pipe 3, and a cushion layer 7 is backfilled at the bottom of the steel corrugated pipe 3.

[0022] After the inner diameter D of the steel corrugated pipe 3 is determined through flood calculation, according to the maximum filling height of the first stage and combined with the pipe material, a suitable thickness and waveform of the steel corrugated pipe are selected. The upper part of the steel corrugated pipe 3 adopts a perforated type to facilitate the rainwater infiltrated from the upper waste to enter the steel corrugated pipe 3. The outside of the perforated steel corrugated pipe 4 is wrapped with a layer of geotextile 5 to prevent the infiltrated rainwater from bringing sediment into the pipe and causing siltation. The perforated steel corrugated pipe 4 should be higher than the highest water surface line in the pipe, and the highest water level line in the pipe is determined according to 0.75D (the clearance height is 0.25D). The aperture d = 1cm - 3cm, and the row spacing L between the holes = 10cm - 0.25D.

[0023] The steel corrugated pipe 3 belongs to a metal structure, has a strong adaptability to deformation, and has relatively low requirements for the foundation material. For high-quality land foundations and general soil foundations, it is directly placed on the foundation with a compaction degree of more than 0.9; for rock foundations, part of the soft rock is excavated and 30 cm of high-quality soil is replaced; for soft soil foundations, a 30 cm thick gravel cushion layer is backfilled.

[0024] 1 m at the top of the steel corrugated pipe 3 (such as Figure 2as shown by 100 cm in (), and backfill the crushed stone soil 6 within 1 m on both sides of the pipe body to avoid damaging the pipe body during the process of waste slag disposal. The backfilling of the crushed stone soil 6 on both sides of the steel corrugated pipe 3 shall be carried out simultaneously, and the compaction drop shall be less than 30 cm. The slope ratio of the backfill slope around the pipe is 1:X, where X≥1.

Claims

1. A flood drainage structure for a high-fill channel-type waste dump, characterized in that, It includes a bottom flood drainage project arranged on one side of the bottom of the channel. The bottom flood drainage project includes a steel corrugated pipe. The upper part of the steel corrugated pipe is in a perforated type. The perforated part of the steel corrugated pipe is a perforated steel corrugated pipe. The outside of the perforated steel corrugated pipe is wrapped with geotextile. Backfilled crushed stone soil is arranged at the top and on both sides of the pipe body of the steel corrugated pipe, and a backfill cushion is arranged at the bottom of the steel corrugated pipe.

2. The flood drainage structure of the high-fill channel-type waste dump according to claim 1, characterized in that, The perforated steel corrugated pipe should be higher than the highest water surface line in the pipe. The aperture d = 1 cm to 3 cm, and the row spacing L between holes = 10 cm to 0.25D.

3. The flood drainage structure of the high-fill channel-type waste dump according to claim 2, characterized in that, The backfilling of crushed stone soil on both sides of the steel corrugated pipe should be carried out simultaneously, and the compaction drop should be less than 30 cm. The slope ratio of the slope of the backfill around the pipe is 1:X, where X≥1.

Images