Self-locking reinforced soil retaining structure

Abstract

The utility model relates to the field of reinforced soil retaining walls, and discloses a self-locking reinforced soil retaining structure, which comprises a rigid net rack and a geogrid, the rigid net rack comprises a horizontal net surface, the geogrid is provided with grid meshes formed by retaining ribs and lacing ribs, and the self-locking reinforced soil retaining structure further comprises a fixing rod, the horizontal net face comprises a bent structure protruding upwards or sinking downwards, the bent structure penetrates through the grid meshes, the blocking ribs at the ends of the geogrids abut against the bent structure, the fixing rods penetrate through the bent structure, and the tie bars at the ends of the geogrids are located between the horizontal net face and the fixing rods. The problems that in an existing retaining wall framework, the contact area between a fixing rod and a geogrid is too small, and the effect of preventing the end of the geogrid from tilting or arching cannot be achieved are solved. According to the geogrid compaction device, the positions of the protruding structures on the horizontal plane are adjusted, so that the fixing rods are matched with the protruding structures, and the geogrid compaction area is effectively increased.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforced earth retaining walls, in particular to a self-locking reinforced earth retaining structure. Background Technique

[0002] In the construction of infrastructure such as retaining structure projects in backfill areas for railways, highways, municipal engineering, water conservancy, hydropower, geotechnical engineering, metallurgy, chemical industry, port terminals, airport construction, environmental protection projects, and disaster treatment, reinforced earth retaining walls are widely used in filling sections due to their advantages such as low requirements for foundation bearing capacity, simple construction, fast construction speed, less land occupation, and beautiful appearance. The reinforced earth structure is composed of three parts: fill soil, tensile reinforcement bars in the fill soil, and wall panels. The lateral pressure generated by the self-weight of the fill soil and other external forces such as loads acts on the wall panels, and the lateral pressure is transmitted to the tensile reinforcement bars through the tensile reinforcement bar connectors on the wall panels. The friction between the fill soil and the tensile reinforcement bars prevents the tensile reinforcement bars from being pulled out, so that the reinforced earth structure can be stabilized.

[0003] The construction process of traditional reinforced earth structures is cumbersome, and the connection methods between the wall panels and the tensile reinforcement bar connectors, as well as between the tensile reinforcement bar connectors and the tensile reinforcement bars, are complex, resulting in a long construction period and high comprehensive construction costs. Therefore, a reinforced earth structure with a reliable connection structure has gradually emerged. For example, the Chinese patent "A retaining wall skeleton" with the authorization announcement number CN219568951U discloses a retaining wall skeleton including a metal frame and a fixing rod. The metal frame includes a bottom surface and a vertical surface extending upward from one side of the bottom surface. The bottom surface intersects the vertical surface at a bottom edge. The upper part of the vertical surface away from the bottom edge has at least one first metal rib substantially parallel to the bottom edge. The rear end of the bottom surface away from the bottom edge includes an n-shaped protrusion structure made of metal strips. The two ends of the fixing rod are respectively connected to the first metal rib and the n-shaped protrusion structure.

[0004] In the above retaining wall framework, the fixing rod forms a triangular structure with the vertical surface and the bottom surface. The fixing rod is equivalent to the hypotenuse of the triangular structure, playing a role in resisting tensile deformation and strengthening the overall structural strength of the retaining wall framework. After the N-shaped protrusion structure is aligned with the end opening of the laid geogrid and installed, the retaining wall framework can be filled with fillers. The lateral pressure of the fillers on the retaining wall framework is converted into tensile force and transmitted to the geogrid through the clamping connection between the end of the geogrid and the N-shaped protrusion structure. This tensile force and the friction force between the geogrid and the fillers reach a two-force balance, thus realizing the stability of the reinforced soil retaining wall. However, since the geogrid is in a coiled and wound state during factory transportation, during actual construction, the geogrid will still automatically curl after being unfolded, especially the end of the geogrid often warps or arches upward. Although the above retaining wall framework can prevent the geogrid from disengaging from the N-shaped protrusion structure by relying on a small number of fixing rods distributed at intervals, the contact area between the fixing rod and the geogrid is too small to prevent the end of the geogrid from warping or arching, resulting in the geogrid being unable to be laid flat horizontally, directly affecting the construction progress and quality. Therefore, the above retaining wall framework still needs to be improved. Utility Model Content

[0005] Aiming at the problems existing in the prior art: the contact area between the fixing rod and the geogrid in the existing retaining wall framework is too small to prevent the end of the geogrid from warping or arching. The purpose of the present utility model is to provide a self-locking reinforced soil retaining structure. By adjusting the position of the convex structure on the horizontal plane, the fixing rod and the convex structure cooperate with each other, effectively increasing the compaction area of the geogrid, solving the problem of warping or arching of the end of the geogrid, and having the advantages of simple structure, reliable connection, rapid installation, etc., which is convenient for large-area popularization and application.

[0006] To achieve the above object, the technical solution of the present utility model is as follows:

[0007] A self-locking reinforced soil retaining structure, comprising a rigid grid and a geogrid. The rigid grid includes a horizontal mesh surface. The geogrid is provided with a grid mesh hole formed by a retaining rib and a reinforcing rib. It also includes a fixing rod. The horizontal mesh surface includes a bending structure that protrudes upward or depresses downward. The bending structure passes through the grid mesh hole and the retaining rib at the end of the geogrid abuts against the bending structure. The fixing rod passes through the bending structure, and moreover, the reinforcing rib at the end of the geogrid is located between the horizontal mesh surface and the fixing rod.

[0008] The present utility model is further arranged as: the horizontal mesh surface further includes a first section and a second section, and the first section and the second section are respectively located at both ends of the bending structure.

[0009] The present utility model is further configured such that: the rigid grid also includes a vertical mesh surface, and the first section is located at one end of the horizontal mesh surface close to the vertical mesh surface.

[0010] The present utility model is further configured such that: the sum of the bending structure on the horizontal mesh surface and the length of the second section matches the length of the grid opening of the geogrid.

[0011] The present utility model is further configured such that: the rigid grid also includes connecting ribs, and connecting ribs are provided on both the first section and the second section.

[0012] The present utility model is further configured such that: it further includes an interlocking tie rod. Connecting ribs are provided on both the horizontal mesh surface and the vertical mesh surface, and both ends of the interlocking tie rod are respectively fixed to the connecting ribs at the edges of the horizontal mesh surface and the vertical mesh surface.

[0013] The present utility model is further configured such that: the shape and size of the fixing rod are both adapted to the bending structure.

[0014] The present utility model is further configured such that: the length of the second section is greater than the length of the first section.

[0015] The present utility model is further configured such that: both the rigid grid and the interlocking tie rod are made of steel bar materials.

[0016] The present utility model is further configured such that: the first section, the bending structure, and the second section on the horizontal mesh surface are integrally provided.

[0017] In summary, the beneficial effects achieved by the present utility model are as follows:

[0018] (1) After the bending structure on the horizontal mesh surface passes through the grid opening of the geogrid, the fixing rod passes through the bending structure, and the tension bar at the end of the geogrid is fixedly clamped between the horizontal mesh surface and the fixing rod, and the contact area between the fixing rod and the geogrid is greatly increased. Since the fixing rod is limited within the space of the bending structure, the fixing rod has a comprehensive and uniform compaction effect on the end of the geogrid, effectively preventing the end of the geogrid from tilting or arching;

[0019] (2) The shape and size of the fixing rod are both adapted to the bending structure, so the bending structure can be made into any shape, and the fixing rod can provide a comprehensive and uniform compaction effect;

[0020] (3) The second section on the horizontal mesh surface is located at the end of the bending structure away from the vertical mesh surface, and the length of the second section is greater than that of the first section, thus expanding the contact area between the horizontal mesh surface and the geogrid. In actual construction, the geogrid can be fixed to the second section in forms such as tying straps. Thus, the end of the geogrid is compacted on the horizontal mesh surface through the fixing rod, and the part of the geogrid in contact with the second section is compacted on the horizontal mesh surface through on-site bundling. The superposition of the two produces a more excellent effect of preventing warping and arching, and finally enables all the positions where warping is likely to occur at the end of the geogrid and near the end to maintain a horizontal state;

[0021] (4) The sum of the lengths of the bending structure and the second section matches the length of the grid mesh hole, so that a retaining rib on the geogrid contacts the connecting rib at the edge of the horizontal mesh surface, thus providing many bundling positions for on-site workers where no slippage will occur when tying the straps. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the specification. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0023] Figure 1 Structural schematic of the self-locking reinforced soil retaining structure in the present invention Figure 1 ;

[0024] Figure 2 is Figure 1 partial enlarged view of part A in

[0025] Figure 3 Side view of the self-locking reinforced soil retaining structure in the present invention

[0026] Figure 4 Structural schematic of the self-locking reinforced soil retaining structure in the present invention after removing the fixing rod

[0027] Figure 5 is Figure 4 partial enlarged view of part B in

[0028] Figure 6 Structural schematic of the self-locking reinforced soil retaining structure in the present invention Figure 2 ;

[0029] Figure 7 is Figure 2 partial enlarged view of part C in

[0030] In the figure: 1. Rigid grid; 11. Horizontal mesh surface; 111. First section; 112. Bending structure; 113. Second section; 12. Vertical mesh surface; 13. Connecting rib; 2. Interlocking tie rod; 3. Geogrid; 31. Retaining rib; 32. Reinforcing rib; 33. Grid mesh hole; 4. Fixed rod. Detailed implementation manners

[0031] Combined with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. For ease of description, the terms "vertical", "horizontal", "left", "right", "up", "down", "inside", "outside", "bottom", etc. used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application.

[0032] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

[0033] As shown in the attached Figures 1-3 figure, a self-locking reinforced soil retaining structure includes a rigid grid 1, an interlocking tie rod 2, a geogrid 3, and a fixed rod 4.

[0034] The geogrid 3 is a kind of reinforcing material commonly used in the existing reinforced soil structures, which is buried in the filler to transfer tensile force and increase friction. The geogrid 3 is composed of mutually perpendicular retaining ribs 31 and reinforcing ribs 32. The length direction of the retaining rib 31 is the f direction in the attached Figure 1 figure, and the length direction of the reinforcing rib 32 is the g direction in the attached Figure 1 figure. The length of the retaining rib 31 is consistent with the length of the rigid grid 1, and the overall length of the geogrid 3 (the length in the g direction) can be matched to the actual requirements of the construction site by the repeated arrangement of the reinforcing rib 32 and the retaining rib 31. The reinforcing rib 32 and the retaining rib 31 are connected to each other to form the grid mesh hole 33.

[0035] The rigid grid 1 includes a horizontal mesh surface 11, a vertical mesh surface 12, and a connecting rib 13. The length direction of the rigid grid 1 is the f direction in the attached Figure 1 figure, and the width direction of the rigid grid 1 is the g direction in the attached Figure 1 figure. The dimensions of the rigid grid 1 can be customized according to the on-site requirements.

[0036] The vertical mesh surface 12 is formed by uniformly spaced and fixed steel bars with a diameter of not less than 5 mm, and all the steel bars used for the vertical mesh surface 12 are subjected to anti-corrosion treatment by galvanizing process. The vertical mesh surface 12 is usually vertically arranged, and two or more connecting bars 13 are horizontally welded and fixed thereon. In this embodiment, one connecting bar 13 is provided at the top of the vertical mesh surface 12, and two connecting bars 13 are designed at equal intervals on the vertical mesh surface 12. In some other embodiments, the included angle between the vertical mesh surface 12 and the horizontally arranged horizontal mesh surface 11 can also be customized according to the engineering needs.

[0037] The horizontal mesh surface 11 includes a first section 111, a bending structure 112 and a second section 113 which are integrally arranged.

[0038] The horizontal mesh surface 11 is formed by equally spaced arrangement of the same and corresponding steel bar materials as those of the vertical mesh surface 12, and two or more connecting bars 13 are welded and fixed on the horizontal mesh surface 11. Among them, the first section 111 is close to the vertical mesh surface 12, the second section 113 is far from the vertical mesh surface 12, and the bending structure 112 is located between the first section 111 and the second section 113.

[0039] In this embodiment, one connecting bar 13 is provided at the end of the horizontal mesh surface 11 far from the vertical mesh surface 12. At the same time, one connecting bar 13 is provided on each of the first section 111 and the second section 113.

[0040] The bending structure 112 is a structure that protrudes upward or depresses downward on the horizontal mesh surface 11, and its shape can be rectangular, square, semi-circular, triangular or other special-shaped structures.

[0041] As shown in the attached Figures 3-5 figure, the bending structure 112 in this embodiment is a rectangular structure protruding upward. At this time, the geogrid 3 should be arranged above the horizontal mesh surface 11. After the bending structure 112 passes through the grid holes 33, the retaining bars 31 at the end of the geogrid 3 are abutted against one end of the bending structure 112 facing the first section 111, and the horizontal tension can be transmitted between the horizontal mesh surface 11 and the geogrid 3.

[0042] In some other embodiments, the bending structure 112 is a special-shaped structure that depresses downward. At this time, the geogrid 3 should be arranged below the horizontal mesh surface 11. Similarly, the bending structure 112 passes through the grid holes 33, and the retaining bars 31 at the end of the geogrid 3 are abutted against one end of the bending structure 112 facing the first section 111.

[0043] As shown in the attached Figures 1-3 and the attached Figures 6-7As shown, after the bending structure 112 passes through the grid mesh holes 33, to prevent the end of the geogrid 3 from tilting or arching, resulting in the separation of the geogrid 3 from the bending structure 112, the fixing rod 4 can be fully inserted into the bending structure 112.

[0044] The length of the fixing rod 4 is consistent with the length of the rigid grid 1. The cross-sectional shape and size of the fixing rod 4 are both adapted to the bending structure 112, so that the fixing rod 4 can fill the internal space of the bending structure 112 as much as possible, so that the reinforcing bars 32 at the end of the geogrid 3 are located between above the horizontal mesh surface 11 and below the fixing rod 4. Moreover, the fixing rod 4 is limited within the space of the bending structure 112, and the contact area between the fixing rod 4 and the geogrid 3 is large, so as to produce a comprehensive and uniform compaction effect on the end of the geogrid 3, preventing the end of the geogrid 3 from tilting or arching.

[0045] When the geogrid 3 forms a stable connection with the horizontal mesh surface 11, the second section 113 partially overlaps with the reinforcing bars 32. At this time, to further improve the anti-warping effect of the horizontal mesh surface 11 on the geogrid 3, in the actual construction on site, the reinforcing bars 32 of the geogrid 3 can be fixed to the second section 113 in the form of binding tapes, cable ties, etc. To provide more binding positions and improve the anti-warping effect, the length of the second section 113 should be greater than the length of the first section 111.

[0046] To further provide more binding positions for the on-site workers where the cable ties will not slip during bundling, the sum of the lengths of the bending structure 112 and the second section 113 matches the length of the grid mesh holes 33, so that a retaining rib 31 on the geogrid 3 contacts the connecting rib 13 at the edge of the horizontal mesh surface 11, and the worker can bundle the cable tie at this connection position. Thus, the end of the geogrid 3 is compacted on the horizontal mesh surface 11 by the fixing rod 4, while the part of the geogrid 3 in contact with the second section 113 is compacted on the horizontal mesh surface 11 by on-site bundling. The two are superimposed to produce a more excellent anti-tilting and arching effect, and finally all the positions at the end of the geogrid 3 and near the end where warping is likely to occur can be kept in a horizontal state.

[0047] The interlocking tie rod 2 is made of steel bars with a diameter of not less than 5 mm and anti-corrosion treatment by galvanizing process. The two ends of the interlocking tie rod 2 are respectively fixed to the connecting ribs 13 at the edges of the horizontal mesh surface 11 and the vertical mesh surface 12, so as to form a stable triangular structure. A number of interlocking tie rods 2 can be evenly arranged in the length direction of the rigid grid 1 according to the actual engineering requirements. The interlocking tie rod 2 can cooperate with the rigid grid 1 to form a self-stabilizing system.

[0048] The implementation principle of the above embodiment is:

[0049] After the rigid grid frame 1 is formed and arranged, align the end of the geogrid 3 in the curled state with the bending structure 112, so that after the bending structure 112 passes through the grid mesh holes 33, completely insert the fixing rod 4 into the bending structure 112. Pull the geogrid 3 in a direction away from the vertical mesh surface 12 to ensure that the retaining rib 31 at the end of the geogrid 3 abuts against one end of the bending structure 112 facing the first section 111. At this time, one retaining rib 31 on the geogrid 3 contacts the connecting rib 13 at the edge of the horizontal mesh surface 11, and the worker can tie the tie straps at this connection position and at the overlapping part of the second section 113 and the tension rib 32, so that all the positions where the end of the geogrid 3 and the positions near the end are prone to warping can be kept in a horizontal state, which is convenient for subsequent filling of the filler above the geogrid 3.

[0050] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art can make various changes and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A self-locking reinforced soil retaining structure, comprising a rigid grid (1) and a geogrid (3), wherein the rigid grid (1) includes a horizontal mesh surface (11), and the geogrid (3) is provided with grid mesh holes (33) formed by retaining bars (31) and tension bars (32), and is characterized in that, It further includes a fixing rod (4). The horizontal mesh surface (11) includes a bending structure (112) that bulges upward or depresses downward. The bending structure (112) passes through the grid mesh holes (33), and the retaining rib (31) at the end of the geogrid (3) abuts against the bending structure (112). The fixing rod (4) passes through the bending structure (112), and the reinforcing rib (32) at the end of the geogrid (3) is located between the horizontal mesh surface (11) and the fixing rod (4).

2. The self-locking reinforced soil retaining structure according to claim 1, wherein The horizontal mesh surface (11) further includes a first section (111) and a second section (113). The first section (111) and the second section (113) are respectively located at both ends of the bending structure (112).

3. The self-locking reinforced soil retaining structure according to claim 2, wherein The rigid grid frame (1) further includes a vertical mesh surface (12). The first section (111) is located at one end of the horizontal mesh surface (11) close to the vertical mesh surface (12).

4. The self-locking reinforced soil retaining structure according to claim 3, wherein, The sum of the length of the bending structure (112) on the horizontal mesh surface (11) and the length of the second section (113) matches the length of the grid mesh holes (33).

5. The self-locking reinforced soil retaining structure according to claim 2, wherein The rigid grid frame (1) further includes connecting ribs (13). Connecting ribs (13) are provided on both the first section (111) and the second section (113).

6. The self-locking reinforced soil retaining structure according to claim 3, characterized in that, It further includes an interlocking pull rod (2). Connecting ribs (13) are provided on both the horizontal mesh surface (11) and the vertical mesh surface (12). Both ends of the interlocking pull rod (2) are respectively fixed to the connecting ribs (13) at the edges of the horizontal mesh surface (11) and the vertical mesh surface (12).

7. The self-locking reinforced soil retaining structure according to claim 1, characterized in that, The shape and size of the fixing rod (4) are both adapted to the bending structure (112).

8. The self-locking reinforced soil retaining structure according to claim 4, characterized in that, The length of the second section (113) is greater than the length of the first section (111).

9. The self-locking reinforced soil retaining structure according to claim 8, characterized in that, Both the rigid grid frame (1) and the interlocking pull rod (2) are made of steel bar materials.

10. The self-locking reinforced soil retaining structure according to claim 9, wherein, The first section (111), the bending structure (112), and the second section (113) on the horizontal mesh surface (11) are integrally provided.

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