Structure of a spoil bank dam

Abstract

A kind of abandoned slag field dam structure, including stone dam body, bottom stone transition layer, concrete facing layer and large stone drainage layer are sequentially arranged from top to bottom in bottom of stone dam body, composite geomembrane layer is laid in stone transition layer inside;Water surface stone transition layer and water surface drainage body are sequentially arranged from inside to outside on the water surface of stone dam body, composite geomembrane layer and shotcrete facing layer are arranged from inside to outside in water surface stone transition layer inside;Water inlet of water release culvert in the middle position of the top of stone dam body is provided with anti-impact wear-resistant shotcrete layer in the contact position of stone dam body;The upstream of stone dam body is provided with dam body anti-impact wear-resistant shotcrete in the contact part with bank slope.The abandoned slag field dam structure provided by the present application can solve the problems of waste of resources and pollution of the environment, has strong anti-permeation and anti-erosion ability, high water discharge capacity and good environmental protection.

Description

Technical Field

[0001] This utility model belongs to the field of construction for spoil disposal site protection and water environment protection, and in particular, it relates to a spoil disposal site retaining dam structure. Background Technology

[0002] In actual construction, the retaining and drainage projects of spoil heaps often lack specialized research and planning, resulting in low flood control standards and poor stability, which easily induces geological disasters such as landslides and debris flows. Existing spoil heap structures usually only use simple stone-filled dam bodies, which suffer from repeated destruction and reconstruction during construction, resulting in a waste of human and material resources and easily damaging the aquatic environment. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a slag barrier dam structure for a slag disposal site, which can overcome the shortcomings of wasting resources and polluting the environment, and achieve the advantages of using local materials, simple construction, strong adaptability, good stability, strong anti-seepage and anti-erosion ability, high water discharge capacity, and good environmental protection.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A spoil heap retaining dam structure includes a stone dam body. The bottom of the stone dam body is provided with a bottom stone transition layer, a concrete facing layer and a large stone drainage layer from top to bottom. The stone transition layer is covered with a bottom composite geomembrane layer.

[0006] On the water-facing surface of the rubble dam, from the inside out, there are a water-facing rubble transition layer and a water-facing drainage body. Inside the water-facing rubble transition layer, from the inside out, there are a water-facing composite geomembrane layer and a shotcrete protective layer.

[0007] A spillway culvert is located at the middle of the top of the rock dam. An anti-erosion and wear-resistant shotcrete layer is installed at the contact point between the inlet of the spillway culvert and the rock dam.

[0008] The upstream section of the dam body, where it contacts the bank slope, is fitted with impact-resistant and wear-resistant shotcrete.

[0009] Preferably, the slag dam body is the excavated waste material that is recycled.

[0010] Preferably, the large stone drainage layer and the water-facing drainage body are fill bodies made of moderately weathered or slightly new rock.

[0011] Preferably, the thickness of the bottom composite geomembrane layer and the water-facing composite geomembrane layer is not less than 3 mm.

[0012] Preferably, a drop outlet is provided at the downstream end of the culvert, and a culvert cover is installed at the top of the culvert.

[0013] Preferably, the thickness of the impact-resistant and wear-resistant shotcrete layer is not less than 15cm.

[0014] Preferably, the thickness of the erosion-resistant and wear-resistant shotcrete in the dam body is not less than 15cm.

[0015] Preferably, the axis of the drainage culvert is parallel to the natural water flow direction.

[0016] The waste disposal site retaining dam structure provided by this utility model has the following beneficial effects:

[0017] 1. The slag dam body adopts the method of recycling slag, which can reuse resources, reduce the amount of slag and environmental protection work, and has the advantages of being both environmentally friendly and efficient.

[0018] 2. The bottom large stone drainage layer is reasonably designed and has the advantages of strong drainage capacity and stable structure.

[0019] 3. The composite geomembrane and the impact-resistant and wear-resistant shotcrete work together to provide sufficient protection, with adequate protective function and high impermeability and impact resistance.

[0020] 4. The drainage culvert is scientifically designed, taking into full account various factors to ensure flood discharge safety during heavy rainfall. It has the advantages of strong flood discharge capacity and reliable flood control safety.

[0021] 5. Impact-resistant and wear-resistant shotcrete cladding enhances the structure's impermeability and impact resistance, extends its service life, and reduces maintenance costs, offering the advantages of long service life and low maintenance costs.

[0022] It can solve the problems of wasting resources and polluting the environment, and achieve the advantages of using local materials, simple construction, strong adaptability, good stability, strong anti-seepage and anti-erosion ability, high drainage capacity, and good environmental protection. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a structural schematic diagram of the cross-section of this utility model (excluding the culvert);

[0025] Figure 2 This is a structural schematic diagram of the cross-section (at the culvert) of this utility model;

[0026] Figure 3 This is a longitudinal section schematic diagram of the present invention;

[0027] Figure 4 This is a schematic plan view of the entire utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] like Figures 1-4 As shown, a spoil disposal site dam structure includes a stone dam body 1. The bottom of the stone dam body 1 is provided with a bottom stone transition layer 5, a concrete facing layer 11 and a large stone drainage layer 2 from top to bottom. The stone transition layer 5 is covered with a bottom composite geomembrane layer 4.

[0030] On the water-facing surface of the rubble dam body 1, from the inside out, there are a water-facing rubble transition layer 13 and a water-facing drainage body 3. Inside the water-facing rubble transition layer 13, from the inside out, there are a water-facing composite geomembrane layer 14 and a shotcrete protective layer 12.

[0031] A drainage culvert 6 is provided at the middle position of the top of the rubble dam 1. An anti-erosion and wear-resistant shotcrete layer 9 is provided at the contact position between the inlet of the drainage culvert 6 and the rubble dam 1.

[0032] The upstream part of the dam body 1, which is in contact with the bank slope, is equipped with erosion-resistant and wear-resistant shotcrete 10.

[0033] The slag dam body 1 is the excavated waste material that can be reused, which can effectively reduce the amount of waste material and environmental protection work at the slag yard.

[0034] The large stone drainage layer 2 and the water-facing drainage body 3 are fill bodies made of moderately weathered or slightly new rocks. The fill bodies have a large porosity and have high strength and permeability after filling.

[0035] The thickness of the bottom composite geomembrane layer 4 and the water-facing composite geomembrane layer 14 shall not be less than 3mm. The specific thickness shall be selected in combination with the project's material reserves and the upstream water head height. It has the characteristics of strong impermeability and high tensile and puncture resistance.

[0036] The height of the rockfill dam body 1 needs to be determined by combining the historical water level downstream and the hydrological conditions upstream, and taking into account a certain recurrence period, so as to reduce the risk of dam overtopping during operation to a large extent.

[0037] Downstream of the drainage culvert 6 is a drop outlet 7, and top of the drainage culvert 6 is a culvert cover 8.

[0038] The number of holes and the size of each hole in the spillway culvert 6, located at the top middle of the rubble dam 1, were determined after calculating the channel's discharge capacity based on upstream hydrological conditions and downstream historical water levels. The controlled discharge flow is between 1 m / s and 3 m / s. The erosion and wear resistance of the concrete structure is sufficient to meet the scouring of this flow velocity and can meet the flood discharge requirements during heavy rainfall.

[0039] The large stone drainage layer 2 located at the bottom of the slag dam 1 undertakes all drainage tasks when the upstream water flow is small, and when the upstream water flow is large and the water level is high enough to overflow the bottom slab elevation of the culvert, it and the culvert together complete the drainage task.

[0040] The thickness of the impact-resistant and wear-resistant shotcrete layer 9 is not less than 15cm, which can significantly reduce the scouring and erosion of the dam body around the culvert by water flow, and is easy to maintain, which improves the service life of the structure and reduces maintenance costs.

[0041] The thickness of the erosion-resistant and wear-resistant shotcrete 10 in the dam body is not less than 15cm, which can significantly reduce the scouring and erosion of the slope and dam body by water flow, and is easy to maintain, which improves the service life of the structure and reduces maintenance costs.

[0042] The axis of the drainage culvert 6 is parallel to the natural water flow direction, which can effectively reduce water erosion and ensure the efficiency of upstream water collection and discharge.

[0043] The concrete facing layer 11 located above the bottom large stone drainage layer 2 can significantly improve the integrity of the bottom large stone drainage layer 2 and increase the service life of the structure.

[0044] The construction process of this utility model is as follows:

[0045] During construction, firstly, loose stones and surface debris at the dam location are removed, and the site is leveled. Then, the bottom large stone drainage layer 2 is constructed. After this layer is completed, a concrete facing layer 11 is constructed on top of it. The concrete facing layer is only poured and roughly leveled on the top surface of the large stone drainage layer 2.

[0046] After the concrete facing layer 11 is completed, a bottom stone slag transition layer 5 with a thickness of 1 / 2 of the design is laid on it, and then a bottom composite geomembrane layer 4 is laid on it. After the composite geomembrane is laid, another bottom stone slag transition layer 5 with a thickness of 1 / 2 of the design is laid on it (to protect the composite geomembrane); then the stone slag dam body 1 is filled.

[0047] Fill to the bottom elevation of the spillway culvert 6, and construct the spillway culvert 6. The number of holes and cross-section of the spillway culvert 6 are selected after the water discharge capacity is checked. After the spillway culvert 6 is completed, construct an anti-erosion and wear-resistant shotcrete layer 9 at the contact position between the spillway culvert inlet and the rock dam body. Then fill to the top according to the design height of the rock dam body 1. The top elevation of the rock dam body 1 is obtained by hydrological analysis of upstream and downstream areas.

[0048] At the construction site on the water-facing side of the rock dam body 1, first fill the water-facing rock transition layer 13 with a thickness of 1 / 2 of the design thickness, then lay the water-facing composite geomembrane layer 14, spray a layer of shotcrete protective layer 12 on it, and then lay the remaining water-facing rock transition layer 13 with a thickness of 1 / 2 of the design thickness; finally fill the upstream water-facing drainage body 3.

[0049] After the rock dam body 1 is filled, impact-resistant and wear-resistant shotcrete 10 is applied to the upstream contact area with the bank slope to increase the resistance to seepage damage in the contact area.

[0050] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The embodiments and features described in this application can be arbitrarily combined without conflict. The protection scope of this utility model should be defined as the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A spoil heap retaining dam structure, comprising a rock dam body (1), characterized in that: The bottom of the rubble dam (1) is provided with a bottom rubble transition layer (5), a concrete facing layer (11) and a large stone drainage layer (2) from top to bottom. The bottom composite geomembrane layer (4) is laid inside the rubble transition layer (5). On the water-facing surface of the rubble dam (1), a water-facing rubble transition layer (13) and a water-facing drainage body (3) are arranged sequentially from the inside to the outside. Inside the water-facing rubble transition layer (13), a water-facing composite geomembrane layer (14) and a shotcrete protective layer (12) are arranged sequentially from the inside to the outside. A drainage culvert (6) is provided at the middle position of the top of the rubble dam (1). An anti-erosion and wear-resistant shotcrete layer (9) is provided at the contact position between the inlet of the drainage culvert (6) and the rubble dam (1). The upstream part of the rubble dam (1) in contact with the bank slope is equipped with erosion-resistant and wear-resistant shotcrete (10).

2. The spoil heap retaining dam structure according to claim 1, characterized in that: The slag dam body (1) is the excavated waste material that is recycled.

3. The spoil heap retaining dam structure according to claim 1 or 2, characterized in that: The large stone drainage layer (2) and the water-facing drainage body (3) are fill bodies obtained by filling with moderately weathered or slightly new rocks.

4. The spoil heap retaining dam structure according to claim 1 or 2, characterized in that: The thickness of the bottom composite geomembrane layer (4) and the water-facing composite geomembrane layer (14) shall not be less than 3 mm.

5. The spoil heap retaining dam structure according to claim 1 or 2, characterized in that: A drop outlet (7) is provided downstream of the drainage culvert (6), and a culvert cover plate (8) is installed on the top of the drainage culvert (6).

6. The spoil heap retaining dam structure according to claim 1 or 2, characterized in that: The thickness of the impact-resistant and wear-resistant shotcrete layer (9) shall not be less than 15cm.

7. The spoil heap retaining dam structure according to claim 1 or 2, characterized in that: The thickness of the impact-resistant and wear-resistant shotcrete (10) of the dam body shall not be less than 15cm.

8. The spoil heap retaining dam structure according to claim 1 or 2, characterized in that: The axis of the drainage culvert (6) is parallel to the natural water flow direction.

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