A new type of assembled steel retaining wall for slope support

Abstract

The application discloses a novel assembled steel retaining wall for slope support, which comprises a retaining plate A and a retaining plate B, the height of the retaining plate B is 1.8m-2.2m lower than that of the retaining plate A, and the retaining plate A and the retaining plate B are both provided with a foundation bottom plate and an H-shaped steel column; the foundation bottom plates are arranged in segments along the length direction of the slope after being spliced, the main support of the retaining plate is a plurality of H-shaped steel columns arranged side by side, the H-shaped steel columns are fixed on the foundation bottom plates, the webs on the H-shaped steel columns serve as the wall body of the retaining wall, and the flange plates of the adjacent H-shaped steel columns are fixed through high-strength bolts; an anchor rod, one end of which passes through the web on the H-shaped steel column of the retaining plate A, is connected with the anchor rod of the retaining wall B through a tensioning piece, and the backfill soil is layered and tamped between the retaining plate A and the retaining plate B until the ground surface. The novel assembled steel retaining wall can be dismantled at will, recycled, construction difficulty is reduced, construction efficiency is improved, cost is reduced, and pollution is reduced.

Description

Technical Field

[0001] This invention relates to concrete construction, and more particularly to a novel prefabricated steel retaining wall for slope protection. Background Technology

[0002] In recent years, with the continuous advancement of infrastructure construction in my country, slope protection engineering has become an indispensable part of infrastructure development. Retaining walls, as a common retaining structure in slope protection engineering, have been widely used and developed in road, water conservancy, and municipal engineering fields. Currently, commonly used retaining wall structures include gravity retaining walls, cantilever retaining walls, buttress retaining walls, anchored retaining walls, and pile-slab retaining walls. Their related theories and design methods are relatively mature and complete, and corresponding design specifications are available. However, traditional cast-in-place retaining structures have also exposed many problems, such as: low control over construction quality, slow construction speed, significant waste of construction materials, and substantial dust pollution during on-site construction.

[0003] The "Guiding Opinions on Vigorously Developing Prefabricated Buildings" calls for the nationwide development of prefabricated buildings. The "Guiding Opinions on Implementing Green Highway Construction" requires the full implementation of standardized construction, the establishment of a long-term mechanism for standardized construction, encouragement of factory production of engineering components and on-site assembly, and the timely formulation of green highway standards and specifications. Therefore, traditional cast-in-place retaining walls can no longer meet the national needs for developing green buildings.

[0004] Prefabricated concrete retaining walls offer advantages such as high component production efficiency, high degree of mechanization in construction, low labor intensity for workers, good finished product quality, and strong compliance with carbon emission standards. They align with the trend of my country's construction industry moving towards standardized design, factory manufacturing, prefabricated construction, and standardized acceptance. However, current prefabricated retaining wall technologies often simply optimize monolithic retaining walls into segmented prefabrication, resulting in a low degree of prefabrication and problems such as low quality and slow construction speed.

[0005] Therefore, it is necessary to develop new prefabricated retaining wall structures to overcome the above problems. Summary of the Invention

[0006] Purpose of the invention: To address the shortcomings and defects of existing technologies, this invention provides a novel prefabricated steel retaining wall for slope protection, which can be easily disassembled and recycled, reducing construction difficulty; improving construction efficiency, reducing costs, and reducing pollution.

[0007] Technical Solution: This invention discloses a novel prefabricated steel retaining wall for slope protection, characterized by: including retaining plate A and retaining plate B, with retaining plate B being 1.8m-2.2m lower in height than retaining plate A; both retaining plate A and retaining plate B are provided with a foundation plate and H-shaped steel columns; the foundation plates are spliced ​​and arranged in sections along the length of the slope; the main support for the retaining plates is multiple H-shaped steel columns arranged side by side, the H-shaped steel columns are fixed to the foundation plate, and the web of the H-shaped steel columns serves as the wall body of the retaining wall; the flanges of adjacent H-shaped steel columns are fixed by high-strength bolts; an anchor rod with one end passing through the web of the H-shaped steel column of retaining plate A, and the other end connected to the anchor rod of retaining wall B through a tensioning member; backfill soil is used between retaining plate A and retaining plate B and compacted in layers until ground level.

[0008] Preferably, the foundation slab has a concrete tenon and a reserved hole on one side, a concrete tenon groove on the other side, and a shear groove on the upper surface of the foundation slab, with embedded bolts around the shear groove. During connection, the concrete tenon of one foundation slab engages with the concrete tenon groove of another foundation slab, and the reserved reinforcing bars are inserted into the corresponding reserved holes, so that the two adjacent foundation slabs are spliced ​​together to form a retaining wall foundation.

[0009] Preferably, the H-shaped steel column includes a web and flanges connected to both sides of the web. Multiple transverse stiffening ribs are provided between the web and the flanges, and the transverse stiffening ribs are distributed equidistantly from top to bottom. The bottom of the web and the flanges are connected to a fixing plate, and a column base stiffening plate is provided at the connection between the fixing plate and the web. A shear key is connected below the fixing plate and is inserted into the shear groove on the upper surface of the foundation plate. The H-shaped steel column is connected to the foundation plate by pre-embedded bolts, and the flanges of adjacent H-shaped steel columns are connected by high-strength bolts to form the retaining wall body.

[0010] Preferably, it also includes cross-shaped steel columns, with both ends of the retaining plate fixed by the cross-shaped steel columns. The cross-shaped steel columns are fixed to the foundation plate. The cross-shaped steel columns include a cross-shaped plate and connecting plates connected to each end face of the cross-shaped plate. A fixing plate is connected to the bottom of the cross-shaped steel column, and a second shear key is connected to the bottom of the fixing plate. The second shear key is inserted into the shear groove on the upper surface of the foundation plate and connected to the foundation plate by pre-embedded bolts.

[0011] Preferably, the anchor rod includes a pad, a nut, and an anchor rod body. The anchor rod passes through a pre-drilled hole in the H-shaped steel column. The top of the anchor rod body is connected to the pad and fixed by the nut. The other end of the anchor rod body is connected to a tensioning member.

[0012] Preferably, the anchor rod body of retaining plate A, the anchor rod body of retaining plate B, and the tensioning member constitute a tie rod assembly. The tensioning member connects the anchor rod body of retaining plate A and the anchor rod body of retaining plate B. After connection, the distance between the two anchor rod bodies can be adjusted by the tensioning member.

[0013] Preferably, multiple tie rod assemblies are provided between retaining plate A and retaining plate B, and then backfill soil is used to compact the soil between retaining plate A and retaining plate B in layers until the ground is reached; at this time, the whole composed of retaining plate A, retaining plate B and backfill soil forms a new type of prefabricated steel retaining wall.

[0014] Preferably, the anchor bolt body and the tensioning member are provided with a protective layer.

[0015] Preferably, the H-shaped steel columns and cross-shaped steel columns are fixed to the foundation plate with high-strength bolts.

[0016] Preferably, the height of the retaining plate B is 2m lower than the height of the retaining plate A.

[0017] Beneficial effects: Compared with existing technologies, this invention has the following significant advantages: It can be easily disassembled and recycled, reducing construction difficulty; it improves construction efficiency, reduces costs, and minimizes pollution. The retaining wall of this invention can be disassembled and moved according to site requirements, making construction convenient, fast, safe, stable, and reliable, while reducing investment costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the base plate of the present invention; Figure 3 This is a schematic diagram of the H-shaped steel column of the present invention; Figure 4 This is a schematic diagram of the cross-shaped steel column of the present invention; Figure 5 This is a schematic diagram of the anchor rod of the present invention; Figure 6 This is a schematic diagram of the structure of the tie rod assembly of the present invention; Figure 7 This is a schematic diagram of the retaining plate connection structure of the present invention; In the diagram, 1 is the foundation plate; 2 is the H-shaped steel column; 3 is the cross-shaped steel column; 4 is the anchor rod; 5 is the tie rod assembly; 11 is the concrete tenon; 12 is the concrete tenon groove; 13 is the reserved hole; 14 is the reserved reinforcing bar; 15 is the shear groove; 16 is the embedded bolt; 21 is the first shear key; 22 is the column base stiffening plate; 23 is the transverse stiffening rib; 31 is the second shear key; 41 is the pad; 42 is the nut; 43 is the anchor rod body; and 44 is the tensioning element. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1As shown, the novel prefabricated steel retaining wall for slope protection of the present invention includes retaining plate A and retaining plate B. The height of retaining plate B is 1.8m-2.2m lower (preferably 2m) than the height of retaining plate A. Both retaining plate A and retaining plate B are provided with a foundation plate 1, H-shaped steel columns 2 and cross-shaped steel columns 3 (the cross-shaped steel columns 3 can be selected or not provided as needed). After the foundation plate 1 is spliced, it is arranged in sections along the length of the slope. The two ends of the retaining plate are connected by the cross-shaped steel columns 3. For fixation, the main support for the retaining wall consists of multiple H-shaped steel columns 2 arranged side by side. The H-shaped steel columns 2 and cross-shaped steel columns 3 are fixed to the foundation slab 1. The web of the H-shaped steel columns 2 serves as the retaining wall body. The flanges of adjacent H-shaped steel columns 2 are fixed with high-strength bolts. Anchor rods 4, one end of which passes through the web of the H-shaped steel column 2 of retaining wall A, are connected to the anchor rods 4 of retaining wall B via tensioning members 44. Backfill soil is used between retaining wall A and retaining wall B, compacted in layers until ground level. The H-shaped steel columns 2 and cross-shaped steel columns 3 are fixed to the foundation slab 1 with high-strength bolts.

[0021] like Figure 2 As shown, one side of the foundation slab 1 is provided with a concrete tenon 11 and a reserved hole 13, and the other side of the foundation slab 1 is provided with a concrete tenon groove 12. The upper surface of the foundation slab 1 is provided with a shear groove 15, and the shear groove 15 is surrounded by embedded bolts 16. When connecting, the concrete tenon 11 of one foundation slab 1 engages with the concrete tenon groove 12 of another foundation slab 1, and the reserved steel bar 14 is inserted into the corresponding reserved hole 13, so that the two adjacent foundation slabs 1 are spliced ​​together to form a retaining wall foundation.

[0022] like Figure 3 As shown, the H-shaped steel column 2 includes a web and flanges connected to both sides of the web. Multiple transverse stiffening ribs 23 are provided between the web and the flanges, and the transverse stiffening ribs 23 are distributed equidistantly from top to bottom. The bottom of the web and the flanges are connected to a fixing plate. A column base stiffening plate 22 is provided at the connection between the fixing plate and the web. A shear key 21 is connected below the fixing plate. The shear key 21 is inserted into the shear groove 15 on the upper surface of the foundation plate 1. The H-shaped steel column 2 is connected to the foundation plate 1 by pre-embedded bolts 16. At the same time, high-strength bolts are used to connect the flanges of adjacent H-shaped steel columns 2 to form the retaining wall body.

[0023] like Figure 4 As shown, the cross-shaped steel column 3 includes a cross-shaped plate and connecting plates connected to each end face of the cross-shaped plate. The bottom of the cross-shaped steel column 3 is connected to a fixing plate, and the bottom of the fixing plate is connected to a shear key 31. The shear key 31 is inserted into the shear groove 15 on the upper surface of the foundation plate 1 and is connected to the foundation plate 1 by pre-embedded bolts 16.

[0024] like Figure 5As shown, the anchor rod 4 includes a pad 41, a nut 42 and an anchor rod body 43. The anchor rod 4 passes through the reserved hole of the H-shaped steel column 2. The top of the anchor rod body 43 is connected to the pad 41 and fixed by the nut 42. The other end of the anchor rod body 43 is connected to the tensioning member 44.

[0025] like Figure 6 As shown, the anchor rod body 43 of retaining plate A, the anchor rod body 43 of retaining plate B, and the tensioning member 44 constitute the tie rod assembly 5. The tensioning member 44 connects the anchor rod bodies 43 of retaining plate A and retaining plate B, and the distance between the two anchor rod bodies 43 can be adjusted through the tensioning member 44 after connection. The tensioning member 44 can drive the anchor rods to move in opposite directions, thereby allowing the length of the tie rod assembly 5 to be adjusted according to usage requirements, facilitating position adjustment during construction and subsequent maintenance.

[0026] The anchor bolt body 43 and the tensioning element 44 are provided with a protective layer on the outside; the outer surface is coated with anti-corrosion materials such as galvanizing or asphalt coating. The anti-corrosion coating can reduce the risk of corrosion, enhance its ability to resist backfill soil erosion, extend the service life of the anchor bolt and tensioning element 44, and ensure the safety and stability of the structure.

[0027] like Figure 7 As shown, multiple tie rod assemblies 5 are installed between retaining plate A and retaining plate B. Then, backfill soil is used to compact the soil between retaining plate A and retaining plate B in layers until the ground is reached. At this time, the whole composed of retaining plate A, retaining plate B and backfill soil forms a new type of prefabricated steel retaining wall.

[0028] The backfill soil increases the wall's self-weight, effectively resisting sliding and overturning. When the soil behind the wall exerts active earth pressure on retaining plate B, retaining plate B exerts passive earth pressure on the internal backfill soil. The active earth pressure... passive earth pressure The internal friction angle of the soil sample is 30 degrees. ; ; This shows that passive earth pressure is nine times that of active earth pressure, providing excellent support. Simultaneously, the tie rod assembly between steel column A and steel column B can transfer the earth pressure from retaining plate B, also contributing positively to the retaining wall. To dismantle the prefabricated steel retaining wall, the backfill soil between retaining plate A and retaining plate B can be removed first, then the bolts between the steel columns and the foundation can be removed, allowing for cost savings and reduced pollution.

Claims

1. A novel prefabricated steel retaining wall for slope protection, characterized in that: The structure includes retaining plate A and retaining plate B. The height of retaining plate B is 1.8m-2.2m lower than that of retaining plate A. Both retaining plate A and retaining plate B are equipped with a foundation plate (1) and H-shaped steel columns (2). The foundation plate (1) is spliced ​​and arranged in sections along the length of the slope. The main support of the retaining plate is multiple H-shaped steel columns (2) arranged in parallel. The H-shaped steel columns (2) are fixed on the foundation plate (1). The web of the H-shaped steel column (2) serves as the wall body of the retaining wall. The flanges of adjacent H-shaped steel columns (2) are fixed by high-strength bolts. An anchor rod (4) with one end passing through the web of the H-shaped steel column (2) of the retaining plate A is connected to the anchor rod (4) of the retaining wall B by a tensioning member (44). The retaining plate A and retaining plate B are backfilled and compacted in layers until the ground surface.

2. The novel prefabricated steel retaining wall for slope protection according to claim 1, characterized in that: The foundation slab (1) has a concrete tenon (11) and a reserved hole (13) on one side, and a concrete tenon groove (12) on the other side. The upper surface of the foundation slab (1) has a shear groove (15), and a pre-embedded bolt (16) is provided around the shear groove (15). When connecting, the concrete tenon (11) of one foundation slab (1) is engaged with the concrete tenon groove (12) of another foundation slab (1), and the reserved steel bar (14) is inserted into the corresponding reserved hole (13) so that the two adjacent foundation slabs (1) are spliced ​​together to form a retaining wall foundation.

3. The novel prefabricated steel retaining wall for slope protection according to claim 1, characterized in that: The H-shaped steel column (2) includes a web and flanges connected to both sides of the web. Multiple transverse stiffening ribs (23) are provided between the web and the flanges. The transverse stiffening ribs (23) are distributed equidistantly from top to bottom. The bottom of the web and the flanges are connected to a fixing plate. A column base stiffening plate (22) is provided at the connection between the fixing plate and the web. A shear key (21) is connected below the fixing plate. The shear key (21) is inserted into the shear groove (15) on the upper surface of the foundation plate (1). The H-shaped steel column (2) is connected to the foundation plate (1) by pre-embedded bolts (16). At the same time, high-strength bolts are used to connect the flanges of adjacent H-shaped steel columns (2) to form the retaining wall body.

4. The novel prefabricated steel retaining wall for slope protection according to claim 1, characterized in that: It also includes a cross-shaped steel column (3), the two ends of the retaining plate are fixed by the cross-shaped steel column (3), the cross-shaped steel column (3) is fixed on the foundation plate (1), the cross-shaped steel column (3) includes a cross-shaped plate and a connecting plate connected to each end face of the cross-shaped plate, the bottom of the cross-shaped steel column (3) is connected to a fixing plate, the bottom of the fixing plate is connected to a shear key two (31), the shear key two (31) is inserted into the shear groove (15) on the upper surface of the foundation plate (1), and is connected to the foundation plate (1) by a pre-embedded bolt (16).

5. The novel prefabricated steel retaining wall for slope protection according to claim 1, characterized in that: The anchor rod (4) includes a pad (41), a nut (42) and an anchor rod body (43). The anchor rod (4) passes through the reserved hole of the H-shaped steel column (2). The top of the anchor rod body (43) is connected to the pad (41) and fixed by the nut (42). The other end of the anchor rod body (43) is connected to the tensioning member (44).

6. The novel prefabricated steel retaining wall for slope protection according to claim 5, characterized in that: The anchor rod body (43) of the retaining plate A, the anchor rod body (43) of the retaining plate B, and the tensioning member (44) form a tie rod assembly (5). The tensioning member (44) connects the anchor rod body (43) of the retaining plate A and the anchor rod body (43) of the retaining plate B. After connection, the distance between the two anchor rod bodies (43) is adjusted by the tensioning member (44).

7. The novel prefabricated steel retaining wall for slope protection according to claim 5, characterized in that: Multiple tie rod assemblies (5) are provided between retaining plate A and retaining plate B. Then, backfill soil is used to compact the soil between retaining plate A and retaining plate B in layers until the ground is reached. At this time, the whole composed of retaining plate A, retaining plate B and backfill soil forms a new type of prefabricated steel retaining wall.

8. The novel prefabricated steel retaining wall for slope protection according to claim 6, characterized in that: The anchor rod body (43) and the tensioning member (44) are provided with a protective layer on the outside.

9. The novel prefabricated steel retaining wall for slope protection according to claim 1, characterized in that: The H-shaped steel column (2) and the cross-shaped steel column (3) are fixed to the foundation plate (1) by high-strength bolts.

10. The novel prefabricated steel retaining wall for slope protection according to claim 1, characterized in that: The height of retaining plate B is 2m lower than the height of retaining plate A.

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