Tensioning connection structure suitable for opposite-pulling type reinforced earth retaining wall

Abstract

The utility model discloses a tensioning connection structure suitable for an opposite-pulling type reinforced earth retaining wall, which belongs to the technical field of road accessory engineering and comprises a tensioning connection padlock, a connecting rod and a plurality of tie bar returning structures, one end of the tensioning connection padlock is connected with a retaining wall panel, the other end of the tensioning connection padlock is connected with the connecting rod, and the connecting rod is connected with the tie bar returning structures in a penetrating manner. And the tie bar bag returning structure is arranged at the end part of the geogrid in the retaining wall. According to the opposite-pulling type reinforced earth retaining wall, the connecting rods penetrate through the upper portions and the lower portions of the tie bar returning and wrapping structures, the connecting rods and the retaining wall panels are connected by tensioning the connecting catches, geogrids in the same plane can be connected into a whole, every two adjacent layers of module panels are connected through the tie bar returning and wrapping structures, and the stability and the overall performance of the opposite-pulling type reinforced earth retaining wall are improved. The connecting effect between the rib material and the retaining wall panel can be effectively improved, the opposite-pulling effect of the geogrid is fully exerted, and then the lateral displacement of the retaining wall panel is reduced; meanwhile, construction is convenient, and engineering construction efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of road ancillary engineering technology, and specifically relates to a tension connection structure suitable for tension-reinforced soil retaining walls. Background Technology

[0002] Tension-reinforced soil retaining walls have been widely used in road engineering due to their land-saving properties and excellent mechanical performance. However, they still have some drawbacks. Firstly, the reinforcement in tension-reinforced soil retaining walls is relatively loose upon initial installation. The tensile effect of the reinforcement is only fully realized after significant lateral deformation of the retaining wall. If manual tensioning of the reinforcement is used during installation, it will affect construction efficiency and the standardization of the project. Secondly, traditional tension-reinforced soil retaining walls rely on geotextile strips to connect the wall panels. When lateral displacement occurs in a localized area of ​​the wall, the stress in individual geotextile strips can easily increase, leading to strip breakage, panel detachment, and ultimately, loss of restraint of the backfill material and instability of the retaining wall structure. Utility Model Content

[0003] To address the technical problems of traditional tension-reinforced soil retaining walls, this utility model provides a tension connection structure suitable for tension-reinforced soil retaining walls.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A tension connection structure suitable for tension-reinforced soil retaining walls includes a tension connection lock, a connecting rod, and a tension bar wrapping structure. One end of the tension connection lock is connected to the retaining wall panel, and the other end is connected to the connecting rod. The upper and lower parts of the tension bar wrapping structure respectively wrap the connecting rod. The tension bar wrapping structure is set at the end of the geogrid inside the retaining wall.

[0006] Furthermore, the tensioning connection lock includes a lock connecting strip and a lock base. Multiple lock bases are provided, and the lock connecting strip connects these multiple lock bases. Each lock base has a pull ring groove and a connecting rod groove with an opening at the top, arranged side-by-side. The pull ring groove is a strip-shaped groove parallel to the retaining wall panel, used to accommodate the pull ring inside the retaining wall panel. Tensioning bolts are provided on the side of the lock base to fix the pull ring in the pull ring groove. The connecting rod groove is arc-shaped to accommodate a connecting rod. The lock connecting strip is located at the opening of the pull ring groove and runs across multiple lock bases. A rotating retainer is provided at the top of the lock base to press and fix the lock connecting strip. A lock fixing spring is provided at the opening of the connecting rod groove to fix the connecting rod in the connecting rod groove.

[0007] Furthermore, the reinforcing bar wrapping structure includes a geogrid, geotextile, geobag, and U-shaped nails. The geobag has a rectangular cross-section with rounded corners. The geotextile is placed on the side of the geobag near the retaining wall panel. The connecting rod is placed between the geobag and the geogrid on its side. The geotextile is placed between the upper and lower geogrids. The end of the geogrid is wrapped around the geotextile and geobag, and the end of the geogrid is fixed to the horizontal part of the bottom geogrid by U-shaped nails.

[0008] Furthermore, the retaining wall panel includes a concrete panel and a U-shaped pull ring, the pull ring being disposed on the inner side of the concrete panel; several concrete panels are masonry together to form the retaining wall panel.

[0009] Furthermore, the connecting rod includes an inner rod and an outer rubber friction sleeve. The inner rod cooperates with the locking base, and the rubber friction sleeve is disposed on the inner rod outside the locking base. The inner rod is multi-sectioned and connected sequentially by threads, and the length of the threaded engagement is not less than 50mm.

[0010] Furthermore, the diameter of the inner rod is no greater than 10mm, the thickness of the rubber friction sleeve is no less than 1mm, and its surface is provided with anti-slip texture.

[0011] Furthermore, the tensioning connection buckle and inner rod are both made of carbon structural steel Q235.

[0012] Furthermore, the rotating retainer consists of two pressure plates, which are connected to the top of both sides of the opening of the pull ring groove via pins, and the pressure plates and pins are rotatably engaged.

[0013] Furthermore, a bearing is provided between the pin and the pressure plate, the height of the pressure plate is not less than 3mm, the diameter of the bearing is not greater than 4mm, and the rotation angle is not less than 180°.

[0014] Furthermore, the thickness of the latch connecting strip is not less than 4mm and the width is not more than 15mm; the width of the latch base is not more than 20mm, the height is not more than 20mm, and the length is not more than 60mm; the thread outer diameter of the tension bolt is not less than 10mm, the nut width is not less than 15mm, and the bolt length is not less than 15mm; the end arc diameter of the pull ring groove is not less than 8mm, and the top opening width is not less than 8mm; the diameter of the connecting rod groove is not less than 12mm, and the top opening width is not less than 10mm; the movable angle of the latch fixing spring is not less than 120°.

[0015] The technological advancements achieved by this invention compared to existing technologies are as follows:

[0016] This invention features a row of reinforcing bar wrapping structures at the ends of the geogrid within the retaining wall. Several of these structures are connected by connecting rods, and the connecting rods and retaining wall panels are linked by tension-connecting locks. This integrates the geogrids on the same plane into a unified whole, creating a synergistic effect during deformation, allowing them to interact and constrain each other. Simultaneously, the reinforcing bar wrapping structures connect two perpendicularly adjacent retaining wall panels, improving the stability and overall performance of the tension-reinforced soil retaining wall. This invention effectively enhances the connection between the reinforcement and the retaining wall panel, fully utilizing the tension effect of the geogrid to reduce lateral displacement of the retaining wall panel. Furthermore, the prefabricated structure facilitates construction, saves worker time, and improves project efficiency. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] In the attached diagram:

[0019] Figure 1 An application state diagram of a tension connection structure suitable for a tension-reinforced soil retaining wall provided by an embodiment of this utility model;

[0020] Figure 2 This is a perspective view of the application state of the tension connection structure in the embodiments of this utility model;

[0021] Figure 3 This is a side view of the reinforcing bar wrapping structure in an embodiment of this utility model;

[0022] Figure 4 This is a top view of the tension connection buckle in an embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the locking base in an embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the connecting rod in an embodiment of the present utility model;

[0025] Figure 7 This is a schematic diagram of the retaining wall panel in an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the helical spring on the locking spring in an embodiment of this utility model;

[0027] In the picture:

[0028] 1-Tensioning connection lock, 101-Rotating fixing device, 102-Lock connecting strip, 103-Lock base, 104-Lock fixing spring, 105-Tensioning bolt, 106-Pull ring groove, 107-Connecting rod groove, 108-Hinge piece, 109-Cylindrical tube, 110-Helical spring; 2-Connecting rod, 201-Inner rod, 202-Rubber friction sleeve; 3-Reinforcing bar wrapping structure, 301-Geogrid, 302-Geotextile, 303-Geotextile bag, 304-U-shaped nail; 4-Retaining wall panel, 401-Concrete panel, 402-Pull ring. Detailed Implementation

[0029] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this utility model will be described below with reference to the accompanying drawings.

[0030] like Figure 1 , Figure 2 As shown in the figure, this utility model provides a tension connection structure suitable for tension-reinforced soil retaining walls, including a tension connection lock 1, a connecting rod 2, and a tension reinforcement return structure 3. One end of the tension connection lock 1 is connected to the retaining wall panel 4, and the other end is connected to the connecting rod 2. The upper and lower parts of the tension reinforcement return structure 3 pass through the connecting rod 2 respectively. Several tension reinforcement return structures 3 are arranged in a row at the ends of the geogrid within the retaining wall. By setting a row of tension reinforcement return structures 3 at the ends of the geogrid 301 within the retaining wall, connecting several tension reinforcement return structures 3 with the connecting rod 2, and then connecting the connecting rod 2 and the retaining wall panel 4 with the tension connection lock 1, the geogrids in the same plane can be connected into a whole, so that they can generate a synergistic effect when deformation occurs, interacting and constraining each other. At the same time, the tension reinforcement return structure connects two adjacent retaining wall panels, improving the stability and overall performance of the tension-reinforced soil retaining wall.

[0031] As a preferred structure, such as Figure 4 , 5As shown, the tensioning connection lock 1 includes a lock connecting strip 102 and a lock base 103. Multiple lock bases 103 are provided, and the lock connecting strip 102 connects multiple lock bases 103. Each lock base 103 has a pull ring groove 106 with an opening at the top and a connecting rod groove 107 arranged side-by-side. The pull ring groove 106 is a strip-shaped groove parallel to the retaining wall panel 4, used to accommodate the pull ring 402 on the inner side of the retaining wall panel 4. Tensioning bolts 10 are provided on the side of the lock base 103. 5. Used to fix the pull ring 402 within the pull ring groove 106; the connecting rod groove 107 is arc-shaped and used to accommodate the connecting rod 2; the locking connecting strip 102 is located at the opening of the pull ring groove 106 and extends across multiple locking bases 103; the top of the locking base 103 is provided with a rotating retainer 101 for pressing and fixing the locking connecting strip 102; a locking fixing spring 104 is provided at the opening of the connecting rod groove 107 to fix the connecting rod 2 within the connecting rod groove 107. For example... Figure 5 , 8 As shown, the locking spring 104 includes an arc-shaped hinge piece 108, a cylindrical tube 109, and a helical spring 110. The helical spring is disposed inside the cylindrical tube, and its two ends are respectively fixed to the two sides of the locking base. One end of the hinge piece is fixed to the outer wall of the cylindrical tube. The hinge piece controls the opening and closing of the connecting rod groove 107 through the helical spring. The hinge piece closes under the elastic force of the helical spring, fixing the inner rod 201 in the connecting rod groove 107. The retaining wall panel 4 and the connecting rod 2 are connected by the locking base 103. The pull ring 402 is confined in the pull ring groove 106 by the locking connecting strip 102. The connecting rod 2 is confined in the connecting rod groove 107 by the locking spring 104. Then, a row of tie rod return structures 3 are connected to the retaining wall panel 4 through the connecting rod 2.

[0032] In specific embodiments of this utility model, such as Figure 3As shown, the reinforcing bar wrapping structure 3 includes a geogrid 301, geotextile 302, geotextile bag 303, and U-shaped nails 304. The geotextile bag 303 has a rectangular cross-section with rounded corners. The geotextile 302 is located on the side of the geotextile bag 303 near the retaining wall panel 4. The connecting rod 2 is located between the geotextile bag 303 and the geogrid 301 on its side. The geotextile 302 is located between the upper and lower geogrids 301. The end of the geogrid 301 is wrapped around the geotextile 302 and the geotextile bag 303, and the end of the upper geogrid 301 is fixed to the horizontal part of the bottom geogrid 301 by U-shaped nails 304. In this design, geogrid 301 is an extension of the geogrid laid flat inside the retaining wall. This extension wraps around a geotextile-lined geobag, and the end of the geogrid is fixed to its horizontal section, forming a solid reinforcing structure that provides overall reinforcement. The geogrids are staggered at the joints of the retaining wall panels, and the aforementioned reinforcing structure is placed at these joints. The geotextile bags bear part of the lateral earth pressure at the joints, and the reinforcing structure connects the upper and lower module panels, constraining outward bending deformation at the panel joints and preventing bulging. This also increases the strength of the joints between the upper and lower retaining wall panels, preventing localized damage to the reinforced soil retaining wall and further ensuring traffic safety.

[0033] In specific implementation, such as Figure 7 As shown, the retaining wall panel 4 includes a concrete panel 401 and a U-shaped pull ring 402, with the pull ring 402 located on the inner side of the concrete panel 401; several concrete panels 401 are masonry together to form the retaining wall panel 4. A locking base is used to connect the pull ring and the connecting rod for easy construction.

[0034] Further optimize the above solution, such as Figure 6 As shown, the connecting rod 2 includes an inner rod 201 and an outer rubber friction sleeve 202. The inner rod 201 cooperates with the locking base 103, and the rubber friction sleeve 202 is disposed on the inner rod 201 outside the locking base 103. The inner rod 201 is multi-sectioned and connected sequentially by threads, and the length of the threaded connection is not less than 50mm. The number of sections of the inner rod can be determined according to the length of the retaining wall, and the threaded connection makes assembly convenient and quick.

[0035] In specific manufacturing, the diameter of the inner rod 201 is no greater than 10mm, matching the connecting rod groove 107 on the locking base 103; the thickness of the rubber friction sleeve 202 is no less than 1mm, and its surface is provided with anti-slip texture to enhance the friction between it and the geogrid on the side of the tensioning bracing structure 3. Meanwhile, both the tensioning connection locking 1 and the inner rod 201 are made of carbon structural steel Q235, which has excellent plasticity and toughness, as well as relatively high strength and hardness, thus improving the service life of the connection structure.

[0036] In a specific embodiment of this utility model, the rotating retainer 1 consists of two pressure plates. The pressure plates are connected to the top of both sides of the opening of the pull ring groove 106 via pins, and the pressure plates and pins are rotatably engaged. A bearing is provided between the pin and the pressure plate. The height of the pressure plate is not less than 3mm, the diameter of the bearing is not greater than 4mm, and the rotation angle is not less than 180°. During installation, the pressure plate is rotated to one side to facilitate the insertion of the pull ring and the installation of the locking connecting strip. Then, the pressure plate is reset to limit the locking connecting strip, preventing it and the pull ring from detaching from the locking base during use.

[0037] In specific manufacturing, the thickness of the latch connecting strip 102 is not less than 4mm and the width is not more than 15mm; the width of the latch base 103 is not more than 20mm, the height is not more than 20mm, and the length is not more than 60mm; the thread outer diameter of the tension bolt 105 is not less than 10mm, the nut width is not less than 15mm, and the bolt length is not less than 15mm; the end arc diameter of the pull ring groove 106 is not less than 8mm, and the top opening width is not less than 8mm; the diameter of the connecting rod groove 107 is not less than 12mm, and the top opening width is not less than 10mm; the movement angle of the latch fixing spring 104 is not less than 120°.

[0038] In summary, this utility model has the advantages of simple and compact structure and high overall stability of the retaining wall. By tensioning the geogrid within the retaining wall through tensioning connection locks connected to the retaining wall panel and connecting rods, the tensile effect of the geogrid can be fully utilized, thereby reducing the lateral displacement of the retaining wall panel. Simultaneously, connecting rods with friction properties are installed at the connection points between the tensioning connection locks and the reinforcing bar back-wrap structure to ensure uniform stress distribution within the geogrid on the same plane, effectively reducing the risk of localized stress concentration. Furthermore, connecting the geogrids on the same plane into a whole allows them to generate a synergistic effect during deformation, interacting and constraining each other, further improving the stability and overall performance of the novel tension-reinforced soil retaining wall. In addition, the prefabricated structure saves construction time and improves project construction efficiency.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A tension connection structure suitable for tension-reinforced soil retaining walls, characterized in that: It includes a tension connection lock, a connecting rod, and a tie bar wrapping structure. One end of the tension connection lock is connected to the retaining wall panel, and the other end is connected to the connecting rod. The upper and lower parts of the tie bar wrapping structure respectively wrap the connecting rod. The tie bar wrapping structure is set at the end of the geogrid inside the retaining wall.

2. The tension connection structure for a tension-reinforced soil retaining wall according to claim 1, characterized in that: The tensioning connection lock includes a lock connecting strip and lock bases. Multiple lock bases are connected by the lock connecting strip. Each lock base has a pull ring groove and a connecting rod groove with an opening at the top, arranged side-by-side. The pull ring groove is a strip-shaped groove parallel to the retaining wall panel, used to accommodate the pull ring inside the retaining wall panel. Tensioning bolts are provided on the side of the lock base to fix the pull ring in the pull ring groove. The connecting rod groove is arc-shaped to accommodate a connecting rod. The lock connecting strip is located at the opening of the pull ring groove and runs across multiple lock bases. A rotating retainer is provided at the top of each lock base to press and fix the lock connecting strip. A lock fixing spring is provided at the opening of the connecting rod groove to fix the connecting rod in the connecting rod groove.

3. A tension connection structure suitable for tension-reinforced soil retaining walls according to claim 2, characterized in that: The reinforcing bar wrapping structure includes a geogrid, geotextile, geobag, and U-shaped nails. The geobag has a rectangular cross-section with rounded corners. The geotextile is placed on the side of the geobag closest to the retaining wall panel. The connecting rod is placed between the geobag and the geogrid on its side. The geotextile is placed between the upper and lower geogrids. The end of the geogrid is wrapped around the geotextile and geobag, and the end of the geogrid is fixed to the horizontal part of the bottom geogrid by U-shaped nails.

4. A tension connection structure suitable for tension-reinforced soil retaining walls according to claim 2, characterized in that: The retaining wall panel includes a concrete panel and a U-shaped pull ring, with the pull ring located on the inside of the concrete panel; several concrete panels are masonry together to form the retaining wall panel.

5. A tension connection structure suitable for tension-reinforced soil retaining walls according to claim 2, characterized in that: The connecting rod includes an inner rod and an outer rubber friction sleeve. The inner rod cooperates with the locking base, and the rubber friction sleeve is disposed on the inner rod outside the locking base. The inner rod is multi-sectioned and connected sequentially by threads, and the length of the threaded engagement is not less than 50mm.

6. A tension connection structure suitable for tension-reinforced soil retaining walls according to claim 5, characterized in that: The inner rod has a diameter of no more than 10 mm, the rubber friction sleeve has a thickness of no less than 1 mm, and its surface is provided with anti-slip texture.

7. A tension connection structure suitable for tension-reinforced soil retaining walls according to claim 5, characterized in that: The tensioning connection lock and inner rod are both made of carbon structural steel Q235.

8. A tension connection structure suitable for tension-reinforced soil retaining walls according to claim 2, characterized in that: The rotating retainer consists of two pressure plates, which are connected to the top of both sides of the opening of the pull ring groove via pins. The pressure plates and pins are rotatably engaged.

9. A tension connection structure suitable for tension-reinforced soil retaining walls according to claim 8, characterized in that: A bearing is provided between the pin and the pressure plate. The height of the pressure plate is not less than 3mm, the diameter of the bearing is not greater than 4mm, and the rotation angle is not less than 180°.

10. A tension connection structure suitable for tie-type reinforced soil retaining walls according to any one of claims 2-9, characterized in that: The thickness of the latch connecting strip is not less than 4mm and the width is not more than 15mm; the width of the latch base is not more than 20mm, the height is not more than 20mm, and the length is not more than 60mm; the thread outer diameter of the tension bolt is not less than 10mm, the nut width is not less than 15mm, and the bolt length is not less than 15mm; the end arc diameter of the pull ring groove is not less than 8mm, and the top opening width is not less than 8mm; the diameter of the connecting rod groove is not less than 12mm, and the top opening width is not less than 10mm; the movable angle of the latch fixing spring is not less than 120°.

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