Simple device for artificial stretching and fixing of geogrid

Abstract

The utility model discloses a simple and easy device for geogrid manual stretching and fixing belongs to geogrid laying auxiliary tool technical field, including draw solid nail, draw solid nail includes horizontal part and vertical part, the horizontal part is U type pole, the both distal ends of horizontal part respectively extend downward and form vertical part, and the lower extreme of vertical part is the tip. The middle part of horizontal part still is provided with tension estimation part, and tension estimation part includes guide rod, spring and grip lever, and the middle part parallel of horizontal part sets up two guide rods, and the both ends of grip lever are slidably connected with guide rod respectively and do not depart from guide rod, and the spring is sleeved on the guide rod, and the guide rod is provided with the close scale, adopts the simple and easy device for geogrid manual stretching and fixing of the utility model, can be good in solving the problem of geogrid stretching, flat laying and fixed, and the construction is simple, and the forming effect is better.

Description

Technical Field

[0001] This utility model relates to a simple device for manually stretching and fixing geogrids, belonging to the technical field of geogrid laying auxiliary tools. Background Technology

[0002] During the construction of geogrids, two methods can be used: mechanical laying and manual laying. The manual laying of a single layer of geogrid generally follows these steps: Clear the construction site, ensuring it is free of debris, sharp objects, or other objects that may damage the geogrid; perform necessary foundation treatments on the construction site, such as leveling and compaction, to ensure the foundation meets design requirements; to prevent skewing, mark white lines or hang lines on the laying layer according to the width of the geogrid; construction workers lay the geogrid from the starting end according to the design requirements and dimensions, and fix the ends; after laying a fixed length of geogrid, construction workers manually stretch and straighten it to ensure the geogrid is flat, wrinkle-free, and tightly adheres to the surrounding soil, overlapping and fixing the two sheets according to design requirements; lay the geogrid in sections sequentially to the design-required end and fix the ends; backfill in layers and sections, compacting and backfilling; only after the backfill soil has been tested and found to meet the design compaction requirements can the next layer be laid. During the manual installation of geogrids, the stretching, straightening, and leveling of the geogrids are primarily achieved manually. During installation, the geogrid needs to be kept flat, taut, and in close contact with the surrounding soil, avoiding wrinkles, overlaps, or twisting. This ensures that the geogrid is evenly stressed and remains stable under various stresses, extending its service life. For unidirectional geogrids, it is also important to ensure that the main stress direction is perpendicular to the direction of the embankment, slope, etc.

[0003] During the manual laying of geogrids, the key is to keep the geogrid flat, taut, and tightly bonded to the surrounding soil. After each layer of geogrid is laid, during the backfilling and compaction of the soil layers, it is essential to ensure that the geogrid does not shift excessively. In conventional laying techniques, the following points warrant improvement: ① For ease of transportation and storage, flexible geogrids are generally in roll form. Tensioning is required during laying to eliminate curling deformation and ensure flatness. However, the internal units of geogrids are mostly flat strips. When workers stretch the geogrid by hand, the limited unit shape makes it difficult to exert force and can easily cut their hands, making it difficult to lay the geogrid flat. ② The conventional practice for manual geogrid laying is to straighten, stretch, and flatten the geogrid in sections as it is laid. However, this is usually only done at the beginning and end of a roll, at overlaps, or according to design requirements. The ends of the geogrid are fixed, but the middle section, although stretched and laid flat, is not fixed. In large-scale operations, the geogrid may not be able to adhere tightly to the soil, resulting in uneven stress on the geogrid. During soil backfilling and compaction, the geogrid is also prone to large displacement. ③ During the laying of the geogrid, if a single person operates, even if the geogrid is fully tensioned beforehand, the change in movement and equipment used during the next step from tensioning to fixing will cause some of the original manual tension to loosen, making it impossible to fix the geogrid tightly. If two people operate, it is not economical.

[0004] Therefore, this utility model is proposed. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a simple device for manually stretching and fixing geogrids.

[0006] The technical solution adopted in this utility model is as follows: a simple device for manually stretching and fixing geogrids is designed, which includes a tension nail, wherein the tension nail includes a horizontal part and a vertical part. The horizontal part is a U-shaped rod, and the two distal ends of the horizontal part extend downward to form a vertical part, the lower end of the vertical part being a pointed tip. A tension estimation part is also provided in the middle of the horizontal part, the tension estimation part including a guide rod, a spring, and a gripping rod. Two guide rods are arranged parallel to each other in the middle of the horizontal part. The two ends of the gripping rod are slidably connected to the guide rods and do not detach from the guide rods. A spring is sleeved on the guide rod, and the guide rod is provided with dense graduations.

[0007] When laying geogrid, the vertical part is passed through the geogrid, and the geogrid is stretched by holding the handle. At this time, the handle slides along the guide rod, causing the spring to be compressed or stretched. The tension is judged by the scale on the guide rod. After the set tension value is reached, the vertical part is driven into the ground to fix the geogrid.

[0008] Furthermore, the two distal ends of the horizontal portion are bent downwards to form vertical portions, or a metal rod is fixed to the two distal ends of the horizontal portion to form vertical portions.

[0009] Furthermore, the guide rod is disposed on the inner side of the horizontal part, the spring is disposed on the guide rod between the grip and the horizontal part, and the end of the guide rod away from the horizontal part is provided with dense graduations.

[0010] Furthermore, a limiting plate is provided at the end of the guide rod away from the horizontal part, and a sliding through hole is provided on the grip rod. The guide rod is inserted into the sliding through hole, and the inner diameter of the sliding through hole is smaller than the outer diameter of the limiting plate.

[0011] Furthermore, this design also includes a diagonal bracing structure, which includes a fixing block and a diagonal bracing nail. A fixing block is provided on each side of the horizontal part, and a diagonal bracing hole is opened on the fixing block, which is inclined towards the inner side of the horizontal part. The diagonal bracing nail passes through the diagonal bracing hole.

[0012] Furthermore, the fixing block is a right-angled trapezoidal block or a triangular block with its inclined surface facing downwards, and the fixing block is welded and fixed to the horizontal part.

[0013] Furthermore, this design also includes a reinforcing rod, which is disposed at the open end of the horizontal section to form a rectangular frame structure.

[0014] Furthermore, this design also includes tie rods, with multiple tie rods arranged in an array on the reinforcing rod, the length of which is less than the length of the vertical section.

[0015] Furthermore, rubber anti-slip sleeves are respectively provided on the middle part of the horizontal section, on the handle, at the transition between the horizontal and vertical sections, and on the reinforcing rod at the tie rod.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] ① Construction workers can use this simple device to stretch the geogrid without direct contact with it, which solves the problems of difficulty in applying force or easy hand cuts. This allows the geogrid to be fully tensioned and also helps improve the safety of construction workers.

[0018] ②This simple device integrates tensioning and fixing, making it easy for a single person to operate and saving labor; at the same time, it effectively improves the situation where the manual tension is loosened due to the movement of construction workers or changes in machinery during the transition between tensioning and fixing.

[0019] ③ In large-scale operations, construction workers can use this simple device to easily and efficiently fix the geogrid in sections, and fix uneven areas during the laying process to ensure that the geogrid is in close contact with the soil and is evenly stressed; the displacement of the geogrid will also be reduced accordingly when the soil is backfilled and compacted.

[0020] This utility model features a novel design, simple structure, and convenient use. When used for manual laying of geogrid, the geogrid is fully tensioned, eliminating curling deformation during transport and storage, ensuring a smooth and tightly bonded installation. The device integrates tensioning and fixing, allowing for easy manual stretching and fixing, reducing tension slack during manual stretching, enabling single-person operation, saving labor, and contributing to worker safety. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the isometric view of this utility model.

[0023] Figure 2 This is a schematic diagram of the tie nail (including rubber anti-slip sleeve) of this utility model.

[0024] Figure 3 This is a schematic diagram of construction step 1 of this utility model.

[0025] Figure 4 This is a schematic diagram of construction step 2 of this utility model.

[0026] Figure 5 This is a schematic diagram of construction step 3 of this utility model.

[0027] Figure 6 This is a schematic diagram of construction step 4 of this utility model.

[0028] Figure 7 This is a schematic diagram of construction step 5 of this utility model.

[0029] Figure 8 This is a schematic diagram of construction step 6 of this utility model.

[0030] Figure 9 This is a schematic diagram of construction step 7 of this utility model.

[0031] Figure 10This is a schematic diagram of construction step 8 of this utility model.

[0032] In the figure: 1. Fastening nail; 2. Horizontal part; 3. Vertical part; 4. Tension estimation part; 5. Guide rod; 6. Spring; 7. Handle rod; 8. Geogrid; 9. Scale; 10. Limiting plate; 11. Fixing block; 12. Diagonal tie nail; 13. Reinforcing rod; 14. Evenly spaced tie nail; 15. Rubber anti-slip sleeve; 16. Laying layer; 17. Simple device (i.e., this utility model). Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Example 1

[0036] like Figure 1-2 As shown, a simple device 17 for manually stretching and fixing a geogrid 8 includes a fixing nail 1. The fixing nail 1 includes a horizontal part 2 and a vertical part 3. The horizontal part 2 is a U-shaped rod, and the two distal ends of the horizontal part 2 extend downward to form the vertical part 3. The lower end of the vertical part 3 is a pointed tip (for easy insertion into the ground). The vertical part 3 passes through the geogrid 8, and then the horizontal part 2 is held to stretch the geogrid 8. After stretching to the desired position, the vertical part 3 is driven into the ground with a hammer, and the horizontal part 2 presses onto the geogrid 8, thereby completing the fixing of the geogrid 8.

[0037] The horizontal section 2 is further provided with a tension estimation section 4 in the middle. The tension estimation section 4 includes a guide rod 5, a spring 6, and a gripping rod 7. Two guide rods 5 are arranged parallel to each other in the middle of the horizontal section 2. The two ends of the gripping rod 7 are slidably connected to the guide rods 5 and do not detach from the guide rods 5. The spring 6 is sleeved on the guide rod 5, and the guide rod 5 is provided with dense scales 9. When laying the geogrid 8, the vertical section 3 is passed through the geogrid 8, and the gripping rod 7 (which can also be held on the horizontal section 2 for easier force application and to prevent the gripping rod 7 from slipping) is held to stretch the geogrid 8. At this time, the gripping rod 7 slides along the guide rod 5, causing the spring 6 to be compressed or stretched. The tension is judged by the scales 9 on the guide rod 5. After the set tension value is reached, the vertical section 3 is driven into the ground to fix the geogrid 8.

[0038] It should be noted that the scale 9 set on the guide rod 5 can be a precise tension scale 9 with numerical value, or it can be a simple equidistant scale 9 (such as setting grooves or raised marks directly on the guide rod 5 as an identifier). It can be without numerical value. When in use, the tension is roughly judged by the number of scale 9 that the handle 7 passes through. Then, when stretching the geogrid 8 for the next time, the handle 7 is pulled to the same position to ensure that the tensile force of the entire geogrid 8 is consistent.

[0039] The tension estimation unit 4 is provided for two purposes: firstly, it can cooperate with the horizontal part 2 to facilitate the gripping and operation of the entire device; secondly, it can determine the approximate tension to be applied when stretching the geogrid 8, preventing damage to the geogrid 8, and facilitating use by different operators or the same operator under different fatigue levels (different types of geogrid 8 can be tested in advance to determine their optimal tensile stress requirements under the stretching of the device in this application); finally, the tension estimation unit 4 can also ensure that the force applied to stretch the geogrid 8 is approximately the same at all points, making the overall stress on the geogrid 8 more uniform.

[0040] Example 2

[0041] This embodiment is a further optimization and refinement of the vertical part 3 based on embodiment 1, specifically as follows:

[0042] The two distal ends of the horizontal portion 2 are bent downwards to form the vertical portion 3, i.e., integrally formed; or, a metal rod is fixed to each of the two distal ends of the horizontal portion 2 to form the vertical portion 3, which can be fixed by welding or by bolts. In this embodiment, the preferred method is to bend downwards at the two distal ends of the horizontal portion 2 to form the vertical portion 3.

[0043] Example 3

[0044] This embodiment is a further optimization and refinement of the tension prediction unit 4 based on embodiment 2, specifically as follows:

[0045] The tension estimation part 4 is located inside the horizontal part 2 (or on the outside). Furthermore, the guide rod 5 is located inside the horizontal part 2, and the spring 6 is located on the guide rod 5 between the handle 7 and the horizontal part 2. The end of the guide rod 5 furthest from the horizontal part 2 has densely spaced graduations 9. When stretching the geogrid 8, the handle 7 is pulled. At this time, the handle 7 slides along the guide rod 5 and compresses the spring 6. The guide rod 5 extends out of the handle 7. The tension is determined by the graduations 9 on the extended guide rod 5. Once the set or required tension value is reached, the vertical part 3 is driven into the ground surface to fix the geogrid 8.

[0046] In this embodiment, a limiting plate 10 is provided at the end of the guide rod 5 away from the horizontal part 2, and a sliding through hole is provided on the grip rod 7. The guide rod 5 is inserted into the sliding through hole to achieve a sliding connection between the two. The inner diameter of the sliding through hole is smaller than the outer diameter of the limiting plate 10, so that the two ends of the grip rod 7 do not detach from the guide rod 5 when sliding along the guide rod 5 respectively.

[0047] Example 4

[0048] This embodiment is a further optimization and refinement of the simplified device 17 based on embodiment 3, specifically as follows:

[0049] The simple device 17 for manual stretching and fixing of geogrid 8 described in this embodiment also includes a diagonal fixing structure. The diagonal fixing structure includes a fixing block 11 and a diagonal nail 12. A fixing block 11 is provided on each side of the horizontal part 2. A diagonal hole is opened on the fixing block 11, which is inclined to the inside of the horizontal part 2. The diagonal nail 12 is inserted into the diagonal hole.

[0050] When the geogrid 8 is fixed to the ground by the horizontal part 2 and the vertical part 3 of the tie nail 1, the geogrid 8 needs to be laid on the ground and then the tie nail 1 is used to fix the geogrid 8 on the ground. However, the vertical part 3 of the tie nail 1 is inserted vertically into the soil to fix the geogrid 8. When the geogrid 8 is pulled by an external force and the direction of the external force is perpendicular to the laid ground, the tie nail 1 will be pulled away in the same direction as the pulling force, which will cause the tie nail 1 to easily come out of the soil and lose its fixing effect on the geogrid 8. Therefore, the fixing effect of the whole device is strengthened by the inclined fixing structure.

[0051] It is understandable that the installation of tie rod 12 can be chosen based on actual needs. It is not necessarily required. In most cases, tie rod 12 can be omitted to simplify the construction process, improve efficiency, and save costs.

[0052] In this embodiment, the fixing block 11 is a right-angled trapezoidal block or a triangular block with its inclined surface facing downwards, making it easy to drive into the ground. The fixing block 11 is welded and fixed to the horizontal part 2, which is simple to set up.

[0053] Example 5

[0054] This embodiment is a further optimization and refinement of the simplified device 17 based on embodiment 4, specifically as follows:

[0055] The simple device 17 for manually stretching and fixing the geogrid 8 described in this embodiment also includes a reinforcing rod 13. The reinforcing rod 13 is disposed at the open end of the horizontal part 2, and together with the horizontal part 2, it forms a rectangular frame structure to improve the overall structural resistance to deformation.

[0056] The simple device 17 for manual stretching and fixing of geogrid 8 described in this embodiment also includes tension nails 14. Multiple tension nails 14 are arrayed on the reinforcing rod 13. The tension nails 14 apply tension to the geogrid 8 located within the range of the two rods in the vertical part 3. On the one hand, this disperses the force of the overall structure on the geogrid 8 and protects the geogrid 8. On the other hand, it makes the geogrid 8 subjected to lateral stretching at multiple points, resulting in uniform stretching. The length of the tension nails 14 is less than the length of the vertical part 3, making it easier to hammer into the ground.

[0057] It is difficult to achieve sufficient tension and fixation using only the vertical part 3 of the tie rod 1. The structure reinforced with tie rod 14 further improves the tension and fixation effect, so that the geogrid 8 is subjected to a more uniform stress distribution during use, which slows down the aging and damage of the material, thereby increasing its service life and reducing maintenance costs.

[0058] The aforementioned tie rod 1, diagonal bracing structure, reinforcing rod 13, tension estimation part 4, and tie rod 14 are all made of galvanized metal material to achieve better corrosion resistance.

[0059] In this embodiment, rubber anti-slip sleeves 15 are respectively provided on the middle part of the horizontal part 2, on the handle 7, at the transition between the horizontal part 2 and the vertical part 3, and on the reinforcing rod 13 at the tie rod 14. The rubber anti-slip sleeves 15 on the middle part of the horizontal part 2 and on the handle 7 are used to prevent slippage and increase friction during manual stretching to facilitate force application. The rubber anti-slip sleeves 15 at other locations are used to reduce slippage and rebound when the hammer strikes the U-shaped nail during the fixing process, thus protecting the anti-corrosion layer.

[0060] This utility model design can take into account both the stretching and fixing functions during the laying of geogrid 8, and can better realize the important links such as stretching, flattening and fixing during the manual laying of geogrid 8. It is convenient to operate and economical.

[0061] The process for manually stretching and fixing the geogrid 8 using this invention is as follows:

[0062] Step 1: Lay the geogrid 8 on the laying layer 16 and fix it at the ends with a simple device 17, such as... Figure 3 As shown;

[0063] Step Two: Install the simplified device 17 of this utility model in other locations. First, use the simplified device 17 to hook the internal units of the geogrid 8, such as... Figure 4 As shown;

[0064] Step 3: Rotate the simple device 17 upwards by about 35 degrees to prevent the geogrid 8 from slipping off during tensioning. Figure 5 As shown.

[0065] Step 4: Hold the handle 7 and the rubber anti-slip sleeves 15 at the horizontal part of the simple device 17 with one hand, and manually tension it, as follows. Figure 6 As shown.

[0066] Step 5: After fully stretching, insert the lower tip of the simple device 17 into the soil, such as... Figure 7 As shown.

[0067] Step Six: Under tension, rotate the simple device 17 downwards by about 35 degrees until it is vertical. Figure 8 As shown.

[0068] Step 7: Use a hammer or similar tool to strike the upper rubber anti-slip sleeve 15 of the simple device 17, ensuring that the simple device 17 is fully inserted into the soil and securely fixed. Figure 9 As shown.

[0069] Step 8: Complete the tensioning and fixing of the geogrid 8 once, such as... Figure 10 As shown.

[0070] Furthermore, in the description of this utility model, unless otherwise stated, the terms "multiple," "multiple roots," and "multiple groups" mean two or more, and "several," "several roots," and "several groups" mean one or more. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used only for descriptive purposes and should not be construed as indicating or implying relative importance.

[0071] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A simple device for manually stretching and fixing geogrids, characterized in that: The device includes a fastening stud, which comprises a horizontal portion and a vertical portion. The horizontal portion is a U-shaped rod, and the two distal ends of the horizontal portion extend downward to form a vertical portion. The lower end of the vertical portion is a pointed tip. The horizontal section is also provided with a tension estimation section in the middle. The tension estimation section includes a guide rod, a spring and a grip rod. Two guide rods are arranged in parallel in the middle of the horizontal section. The two ends of the grip rod are slidably connected to the guide rods and do not detach from the guide rods. A spring is sleeved on the guide rod. The guide rod is provided with dense scales. When laying geogrid, the vertical part is passed through the geogrid, and the geogrid is stretched by holding the handle. At this time, the handle slides along the guide rod, causing the spring to be compressed or stretched. The tension is judged by the scale on the guide rod. After the set tension value is reached, the vertical part is driven into the ground to fix the geogrid.

2. The simple device for manually stretching and fixing geogrids according to claim 1, characterized in that: The two distal ends of the horizontal section are bent downwards to form a vertical section, or a metal rod is fixed to the two distal ends of the horizontal section to form a vertical section.

3. The simple device for manually stretching and fixing geogrids according to claim 2, characterized in that: The guide rod is located on the inner side of the horizontal part, and the spring is located on the guide rod between the grip and the horizontal part. The end of the guide rod away from the horizontal part is provided with dense scales.

4. The simple device for manual stretching and fixing of geogrids according to claim 3, characterized in that: A limiting plate is provided at the end of the guide rod away from the horizontal part, and a sliding through hole is provided on the grip rod. The guide rod is inserted into the sliding through hole, and the inner diameter of the sliding through hole is smaller than the outer diameter of the limiting plate.

5. The simple device for manually stretching and fixing geogrids according to claim 4, characterized in that: It also includes a diagonal bracing structure, which includes a fixing block and a diagonal bracing nail. A fixing block is provided on each side of the horizontal part, and a diagonal bracing hole is opened on the fixing block, which is inclined towards the inner side of the horizontal part. The diagonal bracing nail passes through the diagonal bracing hole.

6. The simple device for manually stretching and fixing geogrids according to claim 5, characterized in that: The fixing block is a right-angled trapezoidal block or a triangular block with its inclined surface facing downwards, and the fixing block is welded and fixed to the horizontal part.

7. The simple device for manually stretching and fixing geogrids according to claim 6, characterized in that: It also includes a reinforcing rod, which is set at the open end of the horizontal part to form a rectangular frame structure.

8. The simple device for manually stretching and fixing geogrids according to claim 7, characterized in that: It also includes tie rods, with multiple tie rods arranged in an array on the reinforcing rod, the length of which is less than the length of the vertical part.

9. The simple device for manually stretching and fixing geogrids according to claim 5, characterized in that: Rubber anti-slip sleeves are respectively provided on the middle part of the horizontal section, on the handle, at the transition between the horizontal and vertical sections, and on the reinforcing rod at the tie rod.

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