CN210529888U

CN210529888U - Bottom drainage facility for channel type slag yard

Info

Publication number: CN210529888U
Application number: CN201920929682.2U
Authority: CN
Inventors: 黄斌; 马力; 仲康; 刘晖; 田红卫; 刘勇; 尹元银; 王志刚
Original assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Current assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-05-15
Anticipated expiration: 2029-06-20

Abstract

The utility model provides a drainage facility for the bottom of a channel type slag yard, which comprises a lower water permeable structure and an upper flood drainage structure, wherein the lower water permeable structure is arranged in a channel at the bottom of the slag yard and is mainly used for draining slag bottom seepage water in a slag piling area; the upper portion flood discharge structure is arranged on the top surface of the lower portion water permeable structure and used for rapidly discharging flood and accumulated water in the channel to the channel at the downstream of the slag slope toe, and the slag is stacked on the top surface of the upper portion flood discharge structure until the top surface of the slag, so that the slag is comprehensively utilized and discarded, and the investment is saved. The large stones and the crushed stone slag adopted by the facility utilize stones in the engineering excavation waste slag as much as possible, on one hand, the waste slag is utilized, and waste materials are changed into valuable materials; on the other hand, the investment is saved.

Description

Bottom drainage facility for channel type slag yard

Technical Field

The utility model relates to a be used for sediment end drainage facility, concretely relates to be used for ditch type slag yard bottom drainage facility.

Background

In the site selection process of the power station, the waste slag field is arranged in the gully after comprehensive analysis. The slag dump has huge slag deposit amount and larger floor area, the channel system where the slag dump is located develops, about 10 channels (shown in figure 1) are found in field investigation, and the confluence area of partial channels is larger and has constant flow water.

The special geographical position determines the site selection limitation of the engineering slag yard limited by the local topographic and geological conditions, and the waste slag yard is inevitably arranged in a channel for water system development.

According to the field conditions, the landforms of the two banks of the channel are steep, and the condition for constructing a slope flood discharge channel is not provided before slag piling. If the box culvert is built along the bottom of the ditch, the diversion facilities need to be continuously added, the time consumption is long, and the cost is high. If the slag is not treated or is not treated properly, the drainage in the slag body is not smooth, the water level rises to weaken the parameters of the slag body, so that the risk of the slag body collapsing is increased, and even a debris flow disaster can be formed.

Therefore, in view of the practical situation that the abandoned slag yard must occupy the pressure channel, in order to not affect the safe starting of the abandoned slag yard and ensure the safety of the slag yard during the slag piling period, a drainage facility used for the bottom of the channel type slag yard is urgently needed to be developed, the structure is simple, the construction is rapid, and the safe starting of the abandoned slag yard and the safety of the slag piling are met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a be used for ditch type slag yard bottom drainage facility, satisfy and abandon the slag yard safety and launch and ensure the safe requirement of heap sediment, provide a scheme for the sediment end drainage, provide a thinking for ditch type slag yard sediment end drainage.

The technical scheme of the utility model:

a drainage facility for the bottom of a channel type slag yard comprises a lower water permeable structure and an upper flood drainage structure, wherein the lower water permeable structure is arranged in a channel at the bottom of the slag yard and is mainly used for draining slag bottom seepage water in a slag piling area; the upper portion flood discharge structure is arranged on the top surface of the lower portion water permeable structure and used for rapidly discharging flood and accumulated water in the channel to the channel on the downstream side of the slag slope toe, and the slag is stacked on the top surface of the upper portion flood discharge structure until the top surface of the slag.

The lower part permeable structure includes that the stone is thrown filling layer, lower floor's geotechnological cloth layer, rubble sediment transition layer, upper geotechnological cloth layer and well sand bed course, the stone is thrown filling layer and is laid on former ditch bottom, throws filling layer at the stone and lays one deck lower floor's geotechnological cloth layer, lays the rubble sediment transition layer on the lower floor's geotechnological cloth layer, lays upper geotechnological cloth layer on the rubble sediment transition layer, and well sand bed course is laid to the top on upper geotechnological cloth layer.

The upper portion drainage structure includes drainage pipe way, clay backfill layer and import trash rack, drainage pipe way is laid in the medium sand bed course top, and drainage pipe way comprises 1 ~ 2 prefabricated reinforced concrete circle culverts or steel pipes, and the clay backfill layer is laid to drainage pipe way's periphery and top, just installs import trash rack to the tip of ditch water flow direction at drainage pipe way.

The top width of the stone block throwing and filling layer is 5-10 m, the thickness is 2-3 m, the particle size is 0.5-0.8 m, and the formed porosity is not less than 30%.

The thickness of the gravel slag transition layer is 30-50 cm, the particle size is 2-15 cm, and the compactness is not less than 0.9.

The thickness of the medium sand cushion layer is 50 cm.

The pipe diameter of the flood drainage pipeline is 1-2 m.

The thickness of the clay backfill layer is 1m, and the compactness is not less than 0.95.

The inlet trash rack is welded by HRB 400-grade phi 20 deformed steel bars, and the row spacing between the reinforcing steel bars is 0.3 m.

The utility model has the advantages that:

(1) comprehensively utilizes the waste slag and saves the investment. The large stones and the crushed stone slag adopted by the facility utilize stones in the engineering excavation waste slag as much as possible, on one hand, the waste slag is utilized, and waste materials are changed into valuable materials; on the other hand, the investment is saved.

(2) The technology is simple and the construction is rapid. The facility adopts materials and structures such as geotextile, reinforcing steel bars, precast concrete pipelines and the like, which are widely applied in various industries, and has the advantages of convenient material acquisition and simple technology; the main drainage structures are finished products, and the related construction process is simple and rapid.

(3) The effect is better, extensive applicability. After the facility is constructed, the requirements of removing flood, accumulated water and slag bottom seepage during slag yard and slag dumping of a waste slag yard can be met, and the risks of slag body collapse and deformation can be greatly reduced. Meanwhile, the facility is quick in construction, low in cost, free of influence on the process of slag disposal of the engineering, applicable to various channel type slag disposal fields and wide in applicability.

Drawings

FIG. 1 is a current state diagram of a water system before slag storage in a certain slag yard.

Fig. 2 is a schematic longitudinal section of a drainage arrangement for the bottom of a channel-type slag yard according to the present invention.

Fig. 3 is a cross-sectional schematic view of a drainage facility for the bottom of a trench-type slag yard according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Throughout the specification and claims, unless expressly stated otherwise, the term "comprise" or variations such as "comprises" or "comprising," etc., will be understood to imply the inclusion of stated elements or components but not the exclusion of any other elements or components.

As shown in fig. 2 to 3, a drainage facility for a trench type slag yard bottom according to an embodiment of the present invention includes a lower water permeable structure 1 and an upper flood drainage structure 2.

Specifically, as shown in fig. 2, the upper drainage structure 2 includes a drainage pipe 21, a clay backfill layer 22, and an inlet drain grating 23. After the lower water permeable structure 1 is finished, installing a flood drainage pipeline 21, wherein the flood drainage pipeline consists of 1-2 prefabricated reinforced concrete circular culverts or steel pipes, the pipe diameter is 1-2 m, and the thickness of the pipe wall meets the strength requirement; after the pipeline is installed, clay backfill layers 22 are adopted in the range of 1m on the periphery and the upper side, and the compactness is not less than 0.95; according to the ditch water flow direction 3, a trash rack 23 is arranged at the inlet of the flood drainage pipeline to prevent branches and large stones in the ditch from entering the flood drainage pipeline 21, the trash rack can be welded by HRB 400-grade phi 20 deformed steel bars, and the row spacing between the steel bars is 0.3 m. And (4) stacking the slag on the top surface until the slag top surface 5 is designed.

Specifically, as shown in fig. 3, the lower permeable structure 1 includes a stone block filling layer 11, a lower geotextile layer 12, a gravel slag transition layer 13, a lower geotextile layer 14, and a middle sand cushion layer 15. On the original ditch bottom 6, stones in the waste slag are preferably utilized to be cast and filled to form a stone cast and filled layer 11, the top width is 5-10 m, the thickness is 2-3 m, the particle size is 0.5-0.8 m, and the formed porosity is not less than 30%; the top surface of the geotextile layer 12 is wrapped at the lower layer, and a 30-50 cm gravel slag cushion layer 13 is paved at the upper layer, the particle size is 2-15 cm, and the compactness is not less than 0.9; and laying an upper geotechnical cloth layer 14, laying a middle sand cushion layer 15 with the thickness of 50cm on the upper geotechnical cloth layer, wherein the compactness is not less than 0.9.

A construction method for a trench type slag yard bottom drainage facility, which is practically used for the trench type slag yard bottom drainage facility, comprises the following steps:

(1) construction preparation, namely repairing the existing or newly-built construction access road in the abandoned dreg yard to meet the requirements of construction machinery and material transportation, meet the requirements of water, electricity, passage, ventilation, communication, yard leveling and the like, and create conditions for engineering start-up.

(2) The method comprises the following steps of (1) site cleaning construction, firstly adopting an excavator to clean vegetation, loose soil and the like along a channel according to topographic conditions along the line; and for places which can not be cleaned locally and mechanically, manual auxiliary cleaning is adopted.

(3) Constructing a lower permeable structure, namely picking up large stones and broken stone slag from the excavation waste slag; secondly, an excavator is adopted to throw and fill large stones in a layered mode, and the top surface is uniform; manually laying a layer of geotextile on the top surface of the large stone block, wherein the geotextile is tightly contacted with the top surface of the large stone block; conveying the crushed stone slag to the top surface of the geotextile by adopting a transport vehicle, manually paving, and rolling by using a bulldozer; and then paving a layer of geotechnical cloth on the top surface of the gravel slag, manually paving medium sand, and compacting by a bulldozer.

(4) The construction of the upper flood drainage structure comprises the steps of firstly, transporting a pipeline to the top surface of the lower permeable structure by adopting a movable crane, manually assisting the installation position, filling joints at the joint parts by adopting asphalt mortar and the like, and fixing the turning parts by adopting concrete piers; the periphery and the upper side of the pipeline are backfilled layer by clay, and the backfilling is carried out by manual dynamic compaction or ram's horn rolling compaction; the simple trash rack at the inlet of the pipeline adopts manually welded steel bars and is fixed on the flood discharge pipe by steel wire ropes.

The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. The facility for draining water at the bottom of the channel type slag yard is characterized by comprising a lower water permeable structure (1) and an upper flood drainage structure (2), wherein the lower water permeable structure (1) is arranged in a channel at the bottom of the slag yard and is mainly used for draining slag bottom seepage water in a slag piling area; upper portion flood drainage structure (2) arrange in the top surface of lower part permeable structure (1) for with flood and ponding in the channel arrange fast and lead to in the channel of heap sediment toe low reaches, heap sediment (4) are stacked to upper portion flood drainage structure (2) top surface, until heap sediment top surface (5).

2. The bottom drainage facility for a trench type slag yard according to claim 1, wherein the lower water permeable structure (1) comprises a stone dumping layer (11), a lower geotextile layer (12), a ballast transition layer (13), an upper geotextile layer (14) and a medium sand cushion layer (15), wherein the stone dumping layer (11) is laid on the original trench bottom (6), one lower geotextile layer (12) is laid on the stone dumping layer (11), the ballast transition layer (13) is laid on the lower geotextile layer (12), the upper geotextile layer (14) is laid on the ballast transition layer (13), and the medium sand cushion layer (15) is laid above the upper geotextile layer (14).

3. The bottom drainage facility for the ditch type slag yard according to claim 2, wherein the upper drainage structure (2) comprises a drainage pipeline (21), a clay backfill layer (22) and an inlet trash rack (23), the drainage pipeline (21) is laid above the medium sand cushion layer (15), the drainage pipeline (21) is composed of 1-2 prefabricated reinforced concrete circular culverts or steel pipes, the clay backfill layer (22) is laid on the periphery and above the drainage pipeline (21), and the inlet trash rack (23) is installed at the end part of the drainage pipeline (21) opposite to the ditch water flow direction (3).

4. The bottom drainage facility for the channel type slag yard according to claim 2, wherein the stone block throwing and filling layer (11) has a top width of 5 to 10m, a thickness of 2 to 3m, a particle size of 0.5 to 0.8m, and a formed porosity of not less than 30%.

5. The bottom drainage facility for the channel type slag yard according to claim 2, wherein the thickness of the gravel slag transition layer (13) is 30-50 cm, the particle size is 2-15 cm, and the degree of compaction is not less than 0.9.

6. A facility for bottom drainage of channel type slag yards according to claim 2, characterized in that the medium sand cushion (15) has a thickness of 50 cm.

7. The bottom drainage facility for the channel type slag yard according to claim 3, characterized in that the pipe diameter of the flood drainage pipe (21) is 1-2 m.

8. A bottom drain arrangement for a channel type slag yard according to claim 3, characterized in that the clay backfill layer (22) has a thickness of 1m and a degree of compaction of not less than 0.95.

9. The bottom drainage facility for the channel type slag yard according to claim 3, characterized in that the inlet trash rack (23) is welded by HRB400 grade phi 20 screw steel, and the row spacing between the steel bars is 0.3 m.