Gully blocking dam structure

Abstract

The gully blocking dam structure comprises a concrete layer, the upper surface of the concrete layer is provided with a bell and spigot penetrating through the concrete layer, and joint filling materials are laid on the periphery and the bottom of the interior of the bell and spigot; a plurality of counterfort retaining walls are further included, the side faces of the counterfort retaining walls are sequentially spliced into a row, tenons matched with the bell and spigot joints are arranged at the bottoms of the counterfort retaining walls, and the tenons are fixed in the bell and spigot joints; the reinforced gabions are stacked on one side of the counterfort retaining wall in a step shape, and the adjacent reinforced gabions are connected in a binding mode; the concrete layer plays a supporting and anti-sliding role on the whole structure, complex construction temperature control measures can be avoided, construction is easy and convenient, and the counterfort type retaining wall and the reinforced gabions effectively block impact of debris flow and mountain torrent deposits; and the joint of the concrete layer and the tenon of the counterfort retaining wall is filled with a joint filling material, so that the structural displacement and stress can be absorbed, and the stability of the concrete layer structure is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy engineering structure design and relates to a gully retaining dam structure. Background Art

[0002] The construction of hydropower pumped storage projects faces the challenges of complex geological environment and natural disasters, especially in mountainous areas, where natural disasters such as mudslides and mountain torrents occur frequently, posing a serious threat to the safe and stable operation of hydropower pumped storage projects. Traditional gully retaining dam structures mostly adopt gravity dams or earth-rock dams, which can play a retaining role to a certain extent, but have many shortcomings. For example, although the gravity dam has a stable structure, it is difficult to construct, the cost is high, and the geological conditions are demanding; although the earth-rock dam is easy to construct and the cost is low, the stability is poor and it is easily affected by water scouring and mudslide impact. Utility Model Content

[0003] The utility model aims to provide a gully retaining dam structure, which solves the problem that the gully retaining dam structure in the prior art cannot have stability, low construction difficulty and low cost at the same time.

[0004] The technical scheme adopted by the utility model is that the gully retaining dam structure includes a concrete layer, a socket penetrating the concrete layer is provided on the upper surface of the concrete layer, and the inner periphery and bottom of the socket are paved with caulking materials; it also includes a plurality of buttress-type retaining walls, the sides of the plurality of buttress-type retaining walls are sequentially spliced ​​into a row, the bottoms of the plurality of buttress-type retaining walls are provided with convex tenons matched with the sockets and the plurality of tenons are fixed in the sockets; it also includes a plurality of reinforced gabions, the plurality of reinforced gabions are stacked in a stepped manner on one side of the buttress-type retaining wall, and adjacent reinforced gabions are tied and connected.

[0005] The utility model gully retaining dam structure is also characterized by:

[0006] The concrete layer is cast with rockfill concrete or C15-C20 normal concrete, and the thickness of the concrete layer is not less than 2.5m.

[0007] The caulking material is asphalt fir board or closed-cell foam board.

[0008] The width of the tenon is 0.5m to 1m, and the height of the tenon is 1 / 3 to 2 / 3 of the thickness of the concrete layer and not less than 1m.

[0009] The buttress-type retaining wall includes a vertical plate, the bottom of which is connected to the convex tenon and the outer surface is tightly fitted with the reinforced gabion, a bottom plate matched with the width of the vertical plate is fixed on the surface opposite to the reinforced gabion, the bottom plate is tightly attached to the upper surface of the concrete layer, a number of ribs are equidistantly arranged between the vertical plate and the bottom plate and the bottoms of the ribs are fixedly connected to the bottom plate, the sides of the ribs are fixedly connected to the vertical plate, and a number of drainage holes are evenly opened on the parts of the vertical plate separated by the ribs.

[0010] The height of the vertical plate is less than 10m, the spacing between adjacent ribs is 1 / 4 to 1 / 2 of the height of the vertical plate, the thickness of the ribs is 1 / 10 to 1 / 4 of the spacing between adjacent ribs and not less than 0.3m; the thickness of the vertical plate is proportional to the spacing between adjacent ribs and not less than 0.3m; the thickness of the bottom plate is proportional to the spacing between adjacent ribs and not less than 0.5m, and the width of the bottom plate is 1 / 4 to 1 / 2 of the height of the vertical plate; the drainage hole is a flat and long structure.

[0011] Several reinforced gabions each include a cuboid formed by splicing 6 pieces of steel mesh, and the interior of the reinforced gabion is filled with stones.

[0012] The beneficial effects of the utility model are:

[0013] Compared with the prior art, the utility model combines a concrete layer, a buttress retaining wall and reinforced gabions to form a gully retaining system that is both stable and flexible. The concrete layer is the main load-bearing and supporting structure of the entire gully retaining dam. Rockfill concrete or C15-C20 normal concrete is used to support and resist the overall structure, which can avoid complicated construction temperature control measures and is simple to construct. The buttress retaining wall and reinforced gabions effectively block the impact of debris flows and mountain torrent deposits. By evenly arranging drainage holes on the vertical plates of the buttress retaining wall, a grid structure is formed, which improves its flood discharge capacity. It can effectively discharge water during rainy seasons or mountain torrents and reduce the impact on downstream buildings. The drainage holes are oblate in shape, which further reduces the weakening of the vertical plate structure of the buttress retaining wall by the openings. The buttress retaining wall is connected to the concrete layer through the sockets through the convex tenons, which enhances the anti-slip ability of the buttress retaining wall. force, ensuring the integrity of its structure and improving its stability under extreme conditions; the combination design of reinforced gabions and filling stones not only enhances the rigidity of the structure, but also facilitates transportation and installation; multiple groups of reinforced gabions are connected by steel bars, which further increases the stability and rigidity of the overall structure of the reinforced gabions; the joints between the concrete layer and the buttress retaining wall are filled with caulking materials, which can absorb structural displacement and stress and ensure the stability of the concrete layer structure; the off-site prefabrication of buttress retaining walls and reinforced gabions and the design of on-site hoisting and assembly make the transportation and installation links in the construction process more efficient, greatly shorten the construction period, reduce construction costs, improve construction efficiency, reduce the complexity of on-site construction pouring, while ensuring its quality and precision, and have good adaptability to the construction site; the process-based construction form can greatly reduce the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the concrete layer in the gully retaining dam structure of the utility model;

[0015] Figure 2 It is a structural diagram of the gully retaining dam structure of the utility model;

[0016] Figure 3 It is a structural diagram of a buttress type retaining wall in the gully retaining dam structure of the utility model;

[0017] Figure 4 It is a structural diagram of a reinforced stone cage in a gully retaining dam structure of the utility model.

[0018] In the figure, 1. concrete layer, 11. socket, 2. buttress retaining wall, 21. vertical plate, 22. bottom plate, 23. rib, 24. tenon, 25. drainage hole, 3. reinforced gabion, 31. steel mesh, 32. stone, 4. caulking material.

[0019] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes. DETAILED DESCRIPTION

[0020] Gully retaining dam structure, refer to Figure 1 , including a concrete layer 1, which is cast with rock-fill concrete or C15-C20 normal concrete. The thickness of the concrete layer 1 is not less than 2.5m, which can support and resist the overall structure, avoid complicated construction temperature control measures, and simplify the construction; a socket 11 is opened on the upper surface of the concrete layer 1 and penetrates the concrete layer 1, and a caulking material 4 is laid around the inside and bottom of the socket 11; the caulking material 4 is an asphalt fir board or a closed-cell foam board, which can absorb structural displacement and stress and ensure the stability of the concrete layer structure.

[0021] Reference Figure 2 The gully retaining dam structure also includes a plurality of buttress retaining walls 2, the sides of which are sequentially spliced ​​into a row. Figure 3 , the bottom of several buttress retaining walls 2 are all provided with tenons 24 adapted to the sockets 11, and several tenons 24 are fixed in the sockets 11, and are connected to the sockets of the concrete layer through the tenons, thereby enhancing the anti-slip ability of the buttress retaining wall, ensuring the integrity of its structure, and improving its stability under extreme conditions. The width of the tenon 24 is 0.5m to 1m, and the height of the tenon 24 is 1 / 3 to 2 / 3 of the thickness of the concrete layer 1 and is not less than 1m; the gully retaining dam structure also includes several reinforced gabions 3, and several of the reinforced gabions 3 are stacked in a stepped manner on one side of the buttress retaining wall 2, and adjacent reinforced gabions 3 are tied and connected; refer to Figure 4 The several reinforced gabions 3 each include a cuboid formed by splicing 6 steel meshes 31. The interior of the reinforced gabions 3 is filled with stones 32, which not only enhances the rigidity of the gully retaining dam structure but also facilitates transportation and installation. The stones 32 can be selected from locally available stones to further reduce costs.

[0022] Reference Figure 3The buttress retaining wall 2 includes a vertical plate 21, the bottom of which is connected to the tenon 24 and the outer surface is tightly fitted with the steel gabion 3. A bottom plate 22 adapted to the width of the vertical plate 21 is fixed on the surface opposite to the steel gabion 3. The bottom plate 22 is close to the upper surface of the concrete layer 1. A number of ribs 23 are equidistantly arranged between the vertical plate 21 and the bottom plate 22, and the bottoms of the ribs 23 are fixed to the bottom plate 22, and the sides of the ribs 23 are fixed to the vertical plate 21. A number of drainage holes 25 are evenly opened on the part of the vertical plate 21 separated by the ribs 23, forming a grid structure, which improves its flood discharge capacity. It can effectively discharge water flow in the rainy season or when flash floods break out, reducing the impact on downstream buildings. The grid structure can adjust its size and shape according to actual needs to adapt to different gully mountains. The drainage hole 25 is a flat and long structure, which further reduces the weakening of the vertical plate 21 structure of the buttress retaining wall caused by the opening; the height of the vertical plate 21 is less than 10m, and the spacing between adjacent ribs 23 is determined to be 1 / 4 to 1 / 2 of the height of the vertical plate 21 according to economic requirements, and the thickness of the ribs 23 is 1 / 10 to 1 / 4 of the spacing between adjacent ribs 23 and is not less than 0.3m, which can not only ensure the strength of the buttress retaining wall 2, but also minimize the cost; the thickness of the vertical plate 21 is proportional to the spacing between adjacent ribs 23 and is not less than 0.3m; the thickness of the bottom plate 22 is proportional to the spacing between adjacent ribs 23 and is not less than 0.5m, and the width of the bottom plate 22 is 1 / 4 to 1 / 2 of the height of the vertical plate 21, which can not only ensure the strength of the buttress retaining wall 2, but also minimize the cost.

[0023] The utility model has a firm and reliable structure and is easy to construct, and can effectively prevent natural disasters such as mudslides. At the same time, the modular and assembled design makes the transportation, installation and other links in the construction process more efficient, greatly shortens the construction period and reduces the construction cost.

[0024] The working principle of the utility model is:

[0025] By pouring a concrete layer 1 in the ditch that needs to be protected and inserting a buttress retaining wall 2 in the concrete layer 1, stacking reinforced gabions 3 on the opposite sides of the vertical plate 21 and the bottom plate 22 and filling them with stones 32, effective discharge of water flow can be achieved and the impact of mud and rock flows and mountain torrent deposits can be effectively blocked. The tenon 24 is fixed to the concrete layer 1 through the socket, thereby improving the stability of the ditch retaining dam structure under extreme conditions.

[0026] (1) Pouring concrete layer 1

[0027] In the channel that needs to be protected, select the axis of the retaining dam with relatively flat terrain, less weathering degree of bedrock and narrow channel width, and cast concrete layer 1 according to the selected axis of the retaining dam. The thickness of the concrete layer 1 is determined according to the occurrence scale V of debris flow or rockfill that may be formed by gully, and shall not be less than 2.5m; the concrete layer 1 is cast with large-volume concrete, and rockfill concrete or C15-C20 normal concrete is selected. During the pouring process, a socket 11 shall be reserved. After the concrete solidifies, ensure that its strength is not less than 75% of its design strength, and lay asphalt fir boards or closed-cell foam boards around the inside and bottom of the socket 11.

[0028] (2) Socket-and-spigot retaining wall 2

[0029] According to the scale V of debris flow or rock pile that may be formed by gullies, the storage capacity of the retaining dam at the corresponding elevation h is checked to determine the height H of the retaining dam. The height H of the retaining dam needs to take into account a certain safety overheight, that is, 0.5m higher than the corresponding elevation h, and the height H of the retaining dam should be less than 10m; according to the height H of the retaining dam, a buttress retaining wall 2 is prefabricated off-site, and a flat and long drainage hole 25 needs to be reserved on the vertical plate 21 of the buttress retaining wall 2. The drainage hole 25 can be adjusted in size and shape according to actual needs to adapt to different gully flash floods or debris flow intensities. The spacing between the ribs 23 can be appropriately adjusted according to economic requirements, and the buttress retaining wall 2 is fixed to the concrete layer 1 by the tenon 24.

[0030] (3) Stacking reinforced gabions 3

[0031] According to the calculated retaining dam height H, the steel cage 3 is processed off-site, and the stone 32 filled in the steel cage 3 is selected from the local easily available stone to reduce the cost. After the steel mesh 31 is welded into a box, the stone 32 is filled, and the box is sealed for transportation. The steel cage 3 is hoisted and stacked on the side opposite to the vertical plate 21 and the bottom plate 22, and is placed horizontally by stacking and connected by steel bar binding in the longitudinal direction.

[0032] Embodiment 1:

[0033] The gully retaining dam structure includes a concrete layer 1, which is cast with rockfill concrete. The thickness of the concrete layer 1 is 3m. A socket 11 penetrating the concrete layer 1 is provided on the upper surface of the concrete layer 1. The inner periphery and bottom of the socket 11 are paved with asphalt fir boards.

[0034] The gully retaining dam structure also includes 5 buttress retaining walls 2, the sides of the 5 buttress retaining walls 2 are spliced ​​in a row in sequence, the bottoms of the 5 buttress retaining walls 2 are provided with tenons 24 that match the sockets 11 and the 5 tenons 24 are fixed in the sockets 11, the width of the tenon 24 is 0.5m, and the height of the tenon 24 is 1m; the gully retaining dam structure also includes 8 layers of reinforced gabions 3, the 8 layers of reinforced gabions 3 are stacked in a stepped manner on one side of the buttress retaining wall 2, and adjacent reinforced gabions 3 are tied and connected; the reinforced gabions 3 each include a rectangular parallelepiped formed by splicing 6 steel meshes 31, and the interior of the reinforced gabions 3 is filled with stones 32.

[0035] The buttress retaining wall 2 includes a vertical plate 21, the bottom of which is connected to the tenon 24 and the outer surface is tightly fitted with the reinforced gabion 3, a bottom plate 22 adapted to the width of the vertical plate 21 is fixed on the surface opposite to the reinforced gabion 3, the bottom plate 22 is close to the upper surface of the concrete layer 1, three ribs 23 are equidistantly arranged between the vertical plate 21 and the bottom plate 22, and the bottoms of the three ribs 23 are all fixedly connected to the bottom plate 22, and the sides of the three ribs 23 are all fixedly connected to the vertical plate 21, and 16 drainage holes 25 are evenly opened on the part of the vertical plate 21 separated by the ribs 23, and the drainage holes 25 are flat and long structures; the height of the vertical plate 21 is 8m, the spacing between adjacent ribs 23 is 4m, and the thickness of the ribs 23 is 1m; the thickness of the vertical plate 21 is 0.6m; the thickness of the bottom plate 22 is 1m, and the width of the bottom plate 22 is 4m.

[0036] Embodiment 2:

[0037] The gully retaining dam structure includes a concrete layer 1, which is cast with C15 normal concrete. The thickness of the concrete layer 1 is 3m. A socket 11 penetrating the concrete layer 1 is provided on the upper surface of the concrete layer 1, and closed-cell foam boards are laid around the inside and bottom of the socket 11.

[0038] The gully retaining dam structure also includes 6 buttress retaining walls 2, the sides of the 6 buttress retaining walls 2 are spliced ​​in a row in sequence, the bottoms of the 6 buttress retaining walls 2 are provided with tenons 24 that match the sockets 11 and the tenons 24 are fixed in the sockets 11, the width of the tenons 24 is 0.75m, and the height of the tenons 24 is 1.5m; the gully retaining dam structure also includes 7 layers of reinforced gabions 3, the 7 layers of reinforced gabions 3 are stacked in a stepped manner on one side of the buttress retaining walls 2, and adjacent reinforced gabions 3 are tied and connected; the 7 layers of reinforced gabions 3 each include a rectangular parallelepiped spliced ​​by 6 steel meshes 31, and the interior of the reinforced gabions 3 is filled with stones 32.

[0039] The buttress retaining wall 2 includes a vertical plate 21, the bottom of which is connected to the tenon 24 and the outer surface is tightly fitted with the reinforced gabion 3, a bottom plate 22 adapted to the width of the vertical plate 21 is fixed on the surface opposite to the reinforced gabion 3, the bottom plate 22 is close to the upper surface of the concrete layer 1, three ribs 23 are equidistantly arranged between the vertical plate 21 and the bottom plate 22, and the bottoms of the three ribs 23 are all fixedly connected to the bottom plate 22, and the sides of the three ribs 23 are all fixedly connected to the vertical plate 21, and 14 drainage holes 25 are evenly opened on the part of the vertical plate 21 separated by the ribs 23, and the drainage holes 25 are flat and long structures; the height of the vertical plate 21 is 8m, the spacing between adjacent ribs 23 is 3m, and the thickness of the ribs 23 is 0.5m; the thickness of the vertical plate 21 is 0.45m; the thickness of the bottom plate 22 is 0.75m, and the width of the bottom plate 22 is 3m.

[0040] Embodiment 3:

[0041] The gully retaining dam structure includes a concrete layer 1, which is cast with C20 normal concrete. The thickness of the concrete layer 1 is 3m. A socket 11 penetrating the concrete layer 1 is provided on the upper surface of the concrete layer 1, and closed-cell foam boards are laid around the inside and bottom of the socket 11.

[0042] The gully retaining dam structure also includes 7 buttress retaining walls 2, the sides of the 7 buttress retaining walls 2 are spliced ​​in a row in sequence, the bottoms of the 7 buttress retaining walls 2 are provided with tenons 24 that are compatible with the sockets 11 and the tenons 24 are fixed in the sockets 11, the width of the tenons 24 is 1m, and the height of the tenons 24 is 2m; the gully retaining dam structure also includes 9 layers of reinforced gabions 3, the 9 layers of reinforced gabions 3 are stacked in a stepped manner on one side of the buttress retaining walls 2, and adjacent reinforced gabions 3 are tied and connected; the 9 layers of reinforced gabions 3 each include a rectangular parallelepiped formed by splicing 6 steel meshes 31, and the interior of the reinforced gabions 3 is filled with stones 32.

[0043] The buttress retaining wall 2 includes a vertical plate 21, the bottom of which is connected to the tenon 24 and the outer surface is tightly fitted with the reinforced gabion 3, a bottom plate 22 adapted to the width of the vertical plate 21 is fixed on the surface opposite to the reinforced gabion 3, the bottom plate 22 is close to the upper surface of the concrete layer 1, three ribs 23 are equidistantly arranged between the vertical plate 21 and the bottom plate 22, and the bottoms of the three ribs 23 are all fixedly connected to the bottom plate 22, and the sides of the three ribs 23 are all fixedly connected to the vertical plate 21, and 20 drainage holes 25 are evenly opened on the part of the vertical plate 21 separated by the ribs 23, and the drainage holes 25 are flat and long structures; the height of the vertical plate 21 is 8m, the spacing between adjacent ribs 23 is 2m, and the thickness of the ribs 23 is 0.3m; the thickness of the vertical plate 21 is 0.3m; the thickness of the bottom plate 22 is 0.5m, and the width of the bottom plate 22 is 2m.

Claims

1. A gully retaining dam structure, characterized in that: The invention comprises a concrete layer (1), wherein a socket (11) is provided on the upper surface of the concrete layer (1), and the socket (11) penetrates the concrete layer (1) in the horizontal direction, and the inner wall and the bottom of the socket (11) are paved with a caulking material (4); further comprises a plurality of buttress-type retaining walls (2), wherein the side surfaces of the plurality of buttress-type retaining walls (2) are sequentially spliced ​​into a row, and the bottoms of the plurality of buttress-type retaining walls (2) are provided with tenons (24) matching the socket (11), and the plurality of tenons (24) are fixed in the socket (11); further comprises a plurality of reinforced gabions (3), wherein the plurality of reinforced gabions (3) are stacked in a stepped manner on one side of the buttress-type retaining wall (2), and adjacent reinforced gabions (3) are tied and connected.

2. The gully retaining dam structure according to claim 1, characterized in that: The concrete layer (1) is cast using rockfill concrete or C15-C20 normal concrete, and the thickness of the concrete layer (1) is not less than 2.5 m.

3. The gully retaining dam structure according to claim 1, characterized in that: The caulking material (4) is an asphalt fir board or a closed-cell foam board.

4. The gully retaining dam structure according to claim 1, characterized in that: The width of the tenon (24) is 0.5m to 1m, and the height of the tenon (24) is 1 / 3 to 2 / 3 of the thickness of the concrete layer (1) and is not less than 1m.

5. The gully retaining dam structure according to claim 1, characterized in that: The buttress-type retaining wall (2) comprises a vertical plate (21), the bottom of which is connected to a tenon (24) and the outer surface of which is tightly fitted with a reinforced gabion (3), a bottom plate (22) matching the width of the vertical plate (21) is fixed on the surface of the vertical plate (21) opposite to the reinforced gabion (3), the bottom plate (22) is tightly attached to the upper surface of the concrete layer (1), a plurality of ribs (23) are equidistantly arranged between the vertical plate (21) and the bottom plate (22), the bottoms of the plurality of ribs (23) are fixedly connected to the bottom plate (22), the sides of the plurality of ribs (23) are fixedly connected to the vertical plate (21), and a plurality of drainage holes (25) are evenly provided on the portion of the vertical plate (21) separated by the ribs (23).

6. The gully retaining dam structure according to claim 5, characterized in that: The height of the vertical plate (21) is less than 10m, the spacing between adjacent ribs (23) is 1 / 4 to 1 / 2 of the height of the vertical plate (21), the thickness of the ribs (23) is 1 / 10 to 1 / 4 of the spacing between adjacent ribs (23) and is not less than 0.3m; the thickness of the vertical plate (21) is proportional to the spacing between adjacent ribs (23) and is not less than 0.3m; the thickness of the bottom plate (22) is proportional to the spacing between adjacent ribs (23) and is not less than 0.5m, and the width of the bottom plate (22) is 1 / 4 to 1 / 2 of the height of the vertical plate (21); and the drainage hole (25) is a flat and long structure.

7. The gully retaining dam structure according to claim 1, characterized in that: The plurality of steel bar cages (3) each comprise a rectangular parallelepiped formed by splicing six steel bar meshes (31), and the interior of the steel bar cage (3) is filled with stone (32).

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