Transverse reinforced geogrid
By spiraling the transverse rib reinforcement strips on the outer surface of the transverse grille ribs of the geogrid, the problem of consistency of the transverse tensile strength and longitudinal tensile strength of the geogrid is solved, the transverse tensile strength is improved, the engineering needs are met, and the waste of longitudinal tensile strength is avoided.
Patent Information
- Application Number
- CN202421892621.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The lateral tensile strength and longitudinal tensile strength of existing geogrids are consistent, which cannot meet the requirements of some engineering projects that the lateral tensile strength is greater than the longitudinal tensile strength, resulting in the waste of longitudinal tensile strength.
The transverse rib reinforcement strip is fixedly connected to the outer surface of the rib body of the transverse grille rib. The transverse rib reinforcement strip is long and spirally wrapped around the outer surface of the rib body of the transverse grille rib to enhance the transverse tensile strength of the geogrid.
The lateral tensile strength of the geogrid is improved, and the project's requirements for lateral tensile strength are met, and the longitudinal tensile strength is avoided, and there is no need to lay multi-layer geogrid.
Smart Images
Figure CN222923720U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of geogrids, in particular to a laterally reinforced geogrid. Background Art
[0002] A geogrid is a kind of grid used in civil engineering, which is a grid formed by the horizontal grid bars and vertical grid bars intersecting with each other. The intersection of the horizontal grid bars and the vertical grid bars is fixed. It can be used for the reinforcement of asphalt pavement, cement pavement and roadbed, and can also be used in projects such as railway subgrade, dam slope protection, airport runway, sand control and desert control. According to different materials, geogrids are generally divided into plastic geogrids, steel-plastic geogrids, glass fiber geogrids and high-strength polyester geogrids. The transverse and longitudinal tensile strengths of traditional geogrids are generally the same. However, the requirements for the transverse tensile strength and longitudinal tensile strength of geogrids are different in some engineering projects. For example, in the reconstruction and expansion of highway pavement projects, in order to avoid pavement cracking caused by uneven settlement of the new and old roadbeds, it is required that the transverse tensile strength of the geogrid is greater than the longitudinal tensile strength. To overcome this problem, multiple layers of geogrids generally need to be laid, which results in a waste of the longitudinal tensile strength of the geogrid. Content of the Utility Model
[0003] The utility model aims to solve the problem that the transverse tensile strength and longitudinal tensile strength of the existing geogrid are the same, which causes waste of the longitudinal tensile strength when the geogrid is used in projects requiring the transverse tensile strength to be greater than the longitudinal tensile strength, and provides a laterally reinforced geogrid with improved transverse tensile strength.
[0004] To solve the above technical problems, the geogrid of the utility model is in a grid shape, including horizontal grid ribs and vertical grid ribs intersecting with each other. The horizontal grid ribs and the vertical grid ribs are fixedly connected. Its structural feature is that: the main bodies of the horizontal grid ribs and the vertical grid ribs are both strip-shaped rib bodies. At least one layer of transverse rib reinforcing cloth strips for enhancing the transverse tensile strength of the geogrid is fixedly connected to the outer surface of the rib body of the horizontal grid ribs. The transverse rib reinforcing cloth strips are strip-shaped, and the transverse rib reinforcing cloth strips are spirally wound around the outer surface of the rib body of the horizontal grid ribs.
[0005] After adopting the above structure, a transverse rib strengthening cloth strip is fixedly connected to the outer surface of the rib body of the transverse grid rib. The transverse rib strengthening cloth strip can enhance the transverse tensile strength of the geogrid. The transverse rib strengthening cloth strip is provided with at least one layer on the outer surface of the rib body of the transverse grid rib. The transverse tensile strength of the geogrid can be adjusted by changing the number of layers of the transverse rib strengthening cloth strip, so that the transverse tensile strength of the geogrid meets the engineering requirements. The transverse rib strengthening cloth strip is spirally wound around the outer surface of the rib body of the transverse grid rib. Therefore, the length direction of the transverse rib strengthening cloth strip is arranged at a certain angle with the length direction of the rib body of the transverse grid rib, that is, the length direction of the transverse rib strengthening cloth strip is neither perpendicular nor parallel to the length direction of the rib body. Compared with directly pasting the transverse rib strengthening cloth strip on the front and back sides of the rib body according to the length direction of the transverse grid rib, when the geogrid generates a large transverse tensile force on the transverse grid rib due to reasons such as uneven settlement of the old and new roadbeds during road widening, since the transverse rib strengthening cloth strip is spirally wound on the rib body, the fibers of the transverse rib strengthening cloth strip are also spirally arranged in space. When subjected to a transverse tensile force, the fibers of the transverse rib strengthening cloth strip have stronger tensile strength, thereby improving the transverse tensile strength of the transverse grid rib and the geogrid, and there is no need to lay multiple layers of geogrids to enhance the transverse tensile strength, without causing waste of the longitudinal tensile strength.
[0006] The rib body of the transverse grid rib is obliquely cross - arranged with the transverse rib strengthening cloth strip, and the crossing angle between the side of the rib body of the transverse grid rib and the side of the transverse rib strengthening cloth strip is 75°.
[0007] The rib body is a reinforced plastic rib, and at least one inner reinforcing steel core for enhancing the tensile strength of the rib body is arranged inside the rib body. The outside of the inner reinforcing steel core is a plastic outer wrapping layer that wraps the inner reinforcing steel core.
[0008] The transverse rib strengthening cloth strip is a fiberglass cloth or a polyester fiber cloth.
[0009] The transverse rib strengthening cloth strip is bonded to the rib body of the transverse grid rib.
[0010] Patterns for enhancing the friction between the longitudinal grid rib and the soil layer are provided on both the front and back surfaces of the longitudinal grid rib.
[0011] Smooth sections are arranged at intervals on the rib bodies of the transverse grid rib and the longitudinal grid rib, and the outer surfaces of the smooth sections are not provided with transverse rib strengthening cloth strips and patterns.
[0012] The transverse grid rib and the longitudinal grid rib are fixedly connected through injection - molded nodes formed by injection molding, and the injection - molded nodes are arranged on the smooth sections of the rib bodies.
[0013] The utility model improves the tensile strength of the transverse grid ribs by arranging transverse rib strengthening cloth strips on the outer surface of the rib bodies of the transverse grid ribs, thereby enhancing the transverse tensile strength of the geogrid. It is suitable for projects with high requirements for transverse tensile strength such as road expansion or widening. There is no need to lay multiple layers of geogrids, which does not cause excess and waste of longitudinal tensile strength. The transverse rib strengthening cloth strips are made of fiberglass cloth or polyester fiber cloth. The transverse rib strengthening winding cloth is spirally wound around the outer surface of the rib bodies of the transverse grid ribs, and its tensile strength effect is better. The geogrid of the utility model enhances the transverse tensile strength. On the basis of meeting the engineering requirements for transverse tensile strength, there is no need to lay multiple layers of geogrids during construction, avoiding excess and waste of the longitudinal tensile strength of the geogrids. Description of the Drawings
[0014] Figure 1 is a plan view of the geogrid of the utility model;
[0015] Figure 2 is a plan view of the transverse grid ribs;
[0016] Figure 3 The upper figure of is a schematic view of the folding line when the transverse rib strengthening cloth strip is spirally wound around the rib body, and the lower figure is a schematic view of the transverse rib strengthening cloth strip after being unfolded on the rib body;
[0017] Figure 4 is a plan view of the longitudinal grid ribs;
[0018] Figure 5 is a cross-sectional view of the rib body, that is Figure 2 the schematic view of the A-A cross-section of ;
[0019] In the figure: 1. Transverse grid ribs; 11. Transverse rib strengthening cloth strips; 111. Side of the cloth strip; 112. Folding line; 12. First smooth section; 2. Longitudinal grid ribs; 21. Pattern; 22. Second smooth section; 3. Injection molding node; 10. First rib body; 101. Plastic outer wrapping layer; 102. Inner strengthening steel core; 20. Second rib body. Detailed Implementation Modes
[0020] Referring to Figures 1-5 , a transversely strengthened geogrid includes transverse grid ribs 1 and longitudinal grid ribs 2 that intersect vertically. The transverse grid ribs 1 and the longitudinal grid ribs 2 are fixedly connected, and the connected geogrid is in a grid shape. The main body of the transverse grid ribs 1 is the first rib body 10, and the main body of the longitudinal grid ribs 2 is the second rib body 20, as shown in Figure 1 , 2, as shown in FIGS. 4, the rib body is strip-shaped. A transverse rib reinforcing cloth strip 11 for enhancing the transverse tensile strength of the geogrid is fixedly connected to the outer surface of the first rib body 10. The transverse rib reinforcing cloth strip 11 is strip-shaped. The transverse rib reinforcing cloth strip 11 is spirally wound around the outer surface of the first rib body 10. The transverse rib reinforcing cloth strip 11 is wound around the outer surface of the first rib body 10 for at least one layer. By changing the number of layers of the transverse rib reinforcing cloth strip 11, the tensile strength of the transverse grid rib 1 is adjusted, and thus the transverse tensile strength of the geogrid is adjusted. The more layers the transverse rib reinforcing cloth strip 11 is provided with, the higher the transverse tensile strength of the geogrid.
[0021] Referring to Figure 2 , 3 , 5, the first rib body 10 and the transverse rib reinforcing cloth strip 11 are arranged obliquely and crosswise. Figure 3 The dotted line in Figure 3 is the broken line 112 when the transverse rib reinforcing cloth strip 11 is wound around the first rib body 10. When the transverse rib reinforcing cloth strip 11 is unfolded, the first rib body 10 and the transverse rib reinforcing cloth strip 11 form a certain oblique crossing angle, that is, Figure 5 ∠α in Figure 5 . Specifically, ∠α is 75°, that is, the side of the first rib body 10 intersects with the side 111 of the cloth strip of the transverse rib reinforcing cloth strip 11 at an angle of 75°. The crosswise arrangement enables the transverse rib reinforcing cloth strip 11 to be spirally wound around the outer surface of the first rib body 10. The fibers of the transverse rib reinforcing cloth strip 11 are spirally arranged around the outside of the first rib body 10 in space. Compared with the transverse rib reinforcing cloth strip 11 being directly attached to the front and back of the first rib body 10 along the length direction of the transverse grid rib 1, when the transverse grid rib 1 is subjected to a transverse tensile force, the transverse grid rib 1 with the transverse rib reinforcing cloth strip 11 spirally wound on the outside has stronger tensile strength. The rib body is a reinforced plastic rib, for example, a reinforced PE rib can be used. As shown in the cross-section of the first rib body 10 in Figure 5 , the cross-section mentioned here refers to the cross-section perpendicular to the length direction of the first rib body 10. At least one inner reinforcing steel core 102 is provided inside the first rib body 10. Figure 5 As shown in Figure 5 , there are three inner reinforcing steel cores 102. One, two, four or other numbers can also be set. The number of inner reinforcing steel cores 102 can be set according to the requirements of the tensile strength. The more the number of inner reinforcing steel cores 102 in the first rib body 10, the greater the tensile strength. The inner reinforcing steel core 102 can be made of steel bars or steel wires. The outside of the inner reinforcing steel core 102 is a plastic outer wrapping layer 101. The structure of the second rib body 20 is basically the same as that of the first rib body 10, and the number of the inner reinforcing steel cores can be the same or different. The transverse rib reinforcing cloth strip 11 is made of fiberglass cloth or polyester fiber cloth. The transverse rib reinforcing cloth strip 11 is bonded to the outer surface of the first rib body 10 by using an adhesive. The fiberglass cloth, the polyester fiber cloth and their bonding methods are prior arts and will not be described in detail here.
[0022] Refer to Figure 1 、 2 、4, on both the front and back sides of the second rib body 20 of the longitudinal grid rib 2, there are patterns 21. The patterns 21 can be formed by pressing. The patterns 21 can enhance the friction between the longitudinal grid rib 2 and the soil layer. As Figure 2 、 4 shown, on the rib bodies of the transverse grid rib 1 and the longitudinal grid rib 2, smooth sections are arranged at intervals. On the outer surface of the smooth sections, there are no transverse rib reinforcing cloth strips 11 and no patterns 21 are provided. Specifically, on the first rib body 10, first smooth sections 12 are arranged at intervals, and on the second rib body 20, second smooth sections 22 are arranged at intervals, which facilitates the injection molding connection of the transverse grid rib 1 and the longitudinal grid rib 2 at the smooth sections. The transverse grid rib 1 and the longitudinal grid rib 2 are fixedly connected by injection molding. Specifically, the first rib body 10 and the second rib body 20 cross at the smooth section, and an injection molding node 3 is formed by injection molding at the crossing point, and secondary injection molding can be specifically adopted.
[0023] Usage method: When using the geogrid of the present utility model for road construction, the rolled geogrid is laid flat on the flat roadbed by a unwinding device or by manual laying method, and then rolled and flattened with a rubber-tyred roller, and then the geogrid is fixed, and then road surface materials such as asphalt or concrete are spread on the roadbed where the geogrid is laid. On the first rib body 10 of the transverse grid rib 1, the transverse rib reinforcing cloth strip 11 is spirally wound, which enhances the tensile strength of the transverse grid rib 1, and thus enhances the transverse tensile strength of the geogrid. On the second rib body 20 of the longitudinal grid rib 2, no reinforcing cloth strip is provided. Therefore, the transverse tensile strength of the geogrid of the present utility model is greater than the longitudinal tensile strength, and it is suitable for projects where the requirement for transverse tensile strength is higher than the longitudinal tensile strength. For example, in the reconstruction, expansion or widening project of a highway, due to the uneven settlement of the new and old roadbeds, it may cause the road surface to crack, and it is required that the transverse tensile strength of the geogrid is greater than the longitudinal tensile strength. The transverse grid rib 1 winds one layer or more than two layers of transverse rib reinforcing cloth strips 11 according to the requirement of transverse tensile strength. The transverse rib reinforcing cloth strip 11 is spirally wound on the first rib body 10, and the fibers of the transverse rib reinforcing cloth strip 11 are also spiral in space. When the transverse tension received by the geogrid is certain, compared with the case where the reinforcing cloth strip is directly attached to the front and back sides of the first rib body 10 along the length direction of the transverse grid rib 1, the geogrid with the transverse rib reinforcing cloth strip 11 arranged in a spiral winding manner in the present utility model has better transverse tensile ability and higher transverse tensile strength.
[0024] The utility model improves the tensile strength of the transverse grid ribs by spirally winding transverse rib reinforcing cloth strips on the outside of the first rib body. The tensile strength of the longitudinal grid ribs remains unchanged, so that the transverse tensile strength of the geogrid is enhanced, which is applicable to projects where the requirement for transverse tensile strength is higher than that for longitudinal tensile strength. It can effectively avoid the pavement cracking caused by uneven settlement of the roadbed, without laying multiple layers of geogrids and without wasting the longitudinal tensile strength of the geogrids.
Claims
1. A transversely reinforced geogrid, the geogrid being in a grid shape, comprising crisscrossing transverse grid ribs (1) and longitudinal grid ribs (2), the transverse grid ribs (1) being fixedly connected to the longitudinal grid ribs (2), wherein: The main bodies of the transverse grid ribs (1) and the longitudinal grid ribs (2) are both long strip-shaped rib bodies. The outer surface of the rib body of the transverse grid rib (1) is fixedly connected with at least one layer of transverse rib reinforcement fabric strips (11) for enhancing the transverse tensile strength of the geogrid. The transverse rib reinforcement fabric strips (11) are long strip-shaped and are spirally wound on the outer surface of the rib body of the transverse grid rib (1).
2. The transversely reinforced geogrid according to claim 1, characterized in that: The rib body of the transverse grille rib (1) and the transverse rib reinforcement strip (11) are arranged obliquely and crosswise, and the intersection angle between the side edge of the rib body of the transverse grille rib (1) and the side edge of the transverse rib reinforcement strip (11) is 75°.
3. The transversely reinforced geogrid according to claim 1, characterized in that: The rib body is a reinforced plastic rib, the interior of the rib body is provided with at least one inner reinforcing steel core (102) for enhancing the tensile strength of the rib body, and the exterior of the inner reinforcing steel core (102) is a plastic outer sheath (101) that wraps the inner reinforcing steel core (102).
4. The transversely reinforced geogrid according to claim 3, characterized in that: The transverse rib reinforcement fabric strip (11) is glass fiber fabric or polyester fiber fabric.
5. The transversely reinforced geogrid according to claim 4, characterized in that: The transverse rib reinforcement fabric strip (11) is bonded to the rib body of the transverse grille rib (1).
6. The transversely reinforced geogrid according to claim 5, characterized in that: Both the front and back surfaces of the longitudinal grille ribs (2) are provided with patterns (21) for enhancing the friction between the longitudinal grille ribs (2) and the soil layer.
7. The transversely reinforced geogrid according to claim 6, characterized in that: The rib bodies of the transverse grille ribs (1) and the rib bodies of the longitudinal grille ribs (2) are both provided with smooth surface sections at intervals, and the outer surfaces of the smooth surface sections are not provided with transverse rib reinforcement strips (11) and patterns (21).
8. The transversely reinforced geogrid according to claim 7, characterized in that: The transverse grille ribs (1) and the longitudinal grille ribs (2) are fixedly connected via injection-molded nodes (3) formed by injection molding, and the injection-molded nodes (3) are arranged on the smooth surface section of the rib body.