A lattice beam structure for geotechnical engineering slopes
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-14
Smart Images
Figure CN224495169U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rock and soil slope protection technology, and in particular to a lattice beam structure for rock and soil engineering slopes. Background Technology
[0002] The grid beam structure for slope protection in geotechnical engineering is an active support method that combines a concrete (or reinforced concrete) grid with an anchoring system. By forming a crisscrossing beam system on the slope surface, the slope is cut into several "grid" units, which not only acts as a confinement and stress adjustment mechanism for the surface soil and rock, but also provides a reliable framework for subsequent ecological restoration, slope closure, or slope drainage.
[0003] Patent document CN222594892U, entitled "Ecological Protection Device for Easily Weathered Rock Slopes," discloses a typical lattice beam-ecological bag-mesh synergistic protection technology. Specifically, several lattice beams are cast onto the rock slope body, with anchor bolts installed at the intersection of the apex angles of adjacent lattice beams. Hooks are pre-embedded or inserted later into the inner side of the lattice beams. Ecological bags are stacked within the lattice beam frames, and galvanized steel wire mesh covers the top of the bags. The edges of the mesh are directly hooked onto the hooks, forming a detachable connection to achieve both reinforcement and greening functions. However, this "first embed hooks, then hang netting" installation method still has obvious defects: First, there are construction errors in the pre-embedded position and exposed length of the hooks, which makes it difficult to tension the netting around the perimeter at the same time. Local loose areas are prone to "bulging and falling off" under wind load, freeze-thaw cycles, or the settling of the eco-bags. Second, when it is necessary to maintain locally damaged netting or eco-bags, the disassembly process requires unhooking point by point, and secondary tensioning is difficult to restore the original design stress state, thus weakening the continuity and durability of the overall protection.
[0004] In conclusion, developing a new type of lattice beam structure that can achieve uniform tensioning of the mesh around the perimeter without relying on pre-embedded hooks and can be quickly assembled and disassembled has become an urgent need to improve the quality of rock and soil slope support and reduce the maintenance cost throughout the entire life cycle. Utility Model Content
[0005] The present invention aims to provide a lattice beam structure for slope protection in geotechnical engineering, in order to overcome the shortcomings of the above-mentioned situation.
[0006] In order to achieve the above objectives, the technical solution of this utility model is as follows:
[0007] A lattice beam structure for slope protection in geotechnical engineering includes:
[0008] A grid-like lattice beam is installed on the surface of the slope. Anchor rods are installed at the intersections of the lattice beams. One end of the anchor rod is connected to the lattice beam, and the other end of the anchor rod is embedded in the slope.
[0009] Ecological bags and protective netting are laid within the grid of the lattice beams, with the ecological bags laid on the side of the protective netting closest to the slope; and
[0010] Multiple sets of connecting components and tensioning components are provided on the inner side of the lattice beam and are connected one-to-one. The multiple sets of connecting components and tensioning components are arranged around the periphery of the protective net. One of them is connected to the lattice beam and the other is connected to the protective net. The tensioning component can tension and pull the protective net by its own expansion and contraction.
[0011] Furthermore, the protective net is provided with multiple connecting rings at intervals around its perimeter, and the tensioning component is connected to each connecting ring in a corresponding manner, and the connecting component is connected to the lattice beam.
[0012] Furthermore, the tensioning assembly includes:
[0013] The U-shaped clips are clamped on both sides of the connecting ring, and each end of the U-shaped clip has a through hole;
[0014] Fasteners that penetrate the connecting ring and the two through holes;
[0015] A screw fixedly connected to the middle of the U-shaped clip and extending away from the through hole; and
[0016] A tensioning ring with one end threadedly connected to the screw, and the other end of the tensioning ring connected to the connecting assembly.
[0017] Furthermore, a limiting pin is vertically fixed to the end of the screw away from the U-shaped clip, and the limiting pin is used to prevent the screw from coming out of the tensioning ring.
[0018] Furthermore, the tensioning ring is elliptical, and one end of the U-shaped clip of the screw is embedded in the tensioning ring.
[0019] Furthermore, the fasteners are a first bolt and nuts, wherein the first bolt passes through the connecting ring and the two through holes and is threadedly connected to the two nuts.
[0020] Furthermore, the connection component includes:
[0021] A threaded sleeve fitted into the lattice beam, the threaded sleeve having an opening facing the connecting ring; and
[0022] A second bolt is located on the extension line of the screw and passes through the tensioning ring. The second bolt is threadedly connected to the threaded sleeve.
[0023] Furthermore, the eco-bag is made of polypropylene or polyester fiber, and the protective net is made of galvanized steel wire mesh.
[0024] Compared with the prior art, this utility model has at least the following advantages:
[0025] (1) This utility model sets up a tensioning component, which adjusts the tension of the protective net by its own expansion and contraction, thus avoiding local slack and detachment. The protective net is connected to the grid column by the connecting component, thereby improving the stability of the protective net.
[0026] Specifically, this invention utilizes the threaded connection between a screw and a tensioning ring to precisely adjust the tension of the protective net. By rotating the tensioning ring, the extension length of the screw can be flexibly adjusted, thereby achieving uniform tension around the protective net and avoiding localized loosening and detachment. This design not only improves the stability of the protective net but also enhances its support for the eco-bag, ensuring a tight fit between the protective net and the eco-bag.
[0027] (2) This utility model adopts a detachable connection method. The protective net is connected to the tensioning component through a connecting ring, and the tensioning component is fixed to the threaded sleeve through a second bolt. This design makes the disassembly and installation of the protective net extremely convenient. When it is necessary to replace a part of the ecological bag or repair a damaged net, simply loosen the second bolt to easily remove the protective net. Replacement of the protective net can be completed by removing and installing the nut. After replacement, tightening the second bolt will restore the original design stress state. This quick assembly and disassembly design not only reduces maintenance costs but also ensures the continuity and durability of the slope protection system.
[0028] (3) This utility model ensures a firm connection between the tensioning component and the lattice beam by using a threaded sleeve and a second bolt as connecting components on the inner side of the lattice beam. The threaded sleeve is pre-embedded during the lattice beam casting process and welded to the internal steel reinforcement of the lattice beam, ensuring the stability of the connecting component. At the same time, the design of the screw and tensioning ring of the tensioning component, with the limit pin preventing the screw from coming out, further enhances the reliability of the connection. This design not only improves the connection strength between the protective net and the lattice beam, but also enhances the stability of the entire slope protection system by uniformly tensioning the protective net. The tension of the protective net can be flexibly adjusted according to actual needs, ensuring good protection under different environmental conditions, thereby improving the overall reliability of the slope protection system. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.
[0030] Figure 1This is a schematic diagram of the overall structure of the lattice beam structure for slope protection in geotechnical engineering according to this utility model;
[0031] Figure 2 This is a top view of the lattice beam structure for slope protection in geotechnical engineering according to this utility model;
[0032] Figure 3 This is an assembly diagram of the connecting component and the tensioning component of this utility model;
[0033] Figure 4 This is an exploded view of the connecting component and the tensioning component of this utility model.
[0034] Attached reference numerals: 1. Slope; 2. Lattice beam; 3. Anchor bolt; 4. Ecological bag; 5. Protective net; 6. Connecting ring; 7. U-shaped clip; 8. First bolt; 9. Nut; 10. Screw; 11. Tensioning ring; 12. Limiting pin; 13. Threaded sleeve; 14. Second bolt. Detailed Implementation
[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0036] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0037] Reference Figure 1-2 This utility model provides a grid beam structure for slope protection in geotechnical engineering, which mainly consists of grid beam 2, anchor rod 3, ecological bag 4, protective net 5, connecting components and tensioning components. The various parts work together to achieve the functions of stabilizing and protecting the slope 1 and ecological restoration.
[0038] The lattice beams 2 are laid on the surface of the slope 1 and are made of reinforced concrete. The overall distribution is in the form of a grid. The grid shape can be selected as rectangular or rhomboid according to the actual terrain of the slope 1. The grid size is determined according to the stability requirements of the slope 1. Adjacent lattice beams 2 are connected by steel bars by binding or welding to ensure the overall structural strength.
[0039] Anchor rods 3 are inserted and fixed at each intersection of the lattice beam 2. The anchor rods 3 are made of high-strength threaded steel bars. One end of the anchor rod is fastened to the lattice beam 2 by a nut 9, and the other end is inserted into the slope 1 and fixed by grouting. The grouting material is cement grout or cement mortar to ensure that the anchor rods 3 are tightly bonded to the rock mass of the slope 1, providing stable tensile support for the lattice beam 2.
[0040] Each grid of the lattice beam 2 is equipped with an ecological bag 4 and a protective net 5. The protective net 5 is laid on the side away from the slope 1 surface, while the ecological bags 4 are stacked and laid on the side of the protective net 5 closest to the slope 1. The ecological bags 4 are made of polypropylene or polyester fiber, which are highly corrosion-resistant and have good anti-aging properties. They are filled with planting soil mixed with grass seeds, shrub seeds, and organic fertilizer, which can form vegetation cover on the slope 1 surface and achieve ecological restoration. The protective net 5 is made of galvanized steel wire mesh with a moderate mesh size, usually 5cm-10cm. It can provide support for the ecological bags 4 and prevent the erosion of the surface soil of the slope 1. The galvanizing treatment further enhances its rust resistance and extends its service life.
[0041] To ensure a tight fit between the protective netting 5 and the lattice beam 2, multiple sets of connecting components and tensioning components are evenly arranged along the perimeter of the protective netting 5 on the inner side of the lattice beam 2. Each set of connecting components is connected to a corresponding tensioning component. One of the two is connected to the inner side of the lattice beam 2, and the other is connected to the protective netting 5. The tensioning component can tension and pull the protective netting 5 by its own expansion and contraction.
[0042] Specifically, the connecting component is directly fixed to the inner side of the lattice beam 2, while the tensioning component is connected to the protective net 5. By adjusting the extension and retraction of the tensioning component, the protective net 5 can be tensioned and pulled to prevent it from loosening or sagging.
[0043] Multiple connecting rings 6 are fixed at intervals along the periphery of the protective netting 5. The connecting rings 6 are circular metal rings, such as galvanized steel rings, and are fixed to the steel wires of the protective netting 5 by welding or strong binding. The spacing between adjacent connecting rings 6 is adjusted according to the size of the protective netting 5, typically 30cm-50cm, to ensure uniform stress on the protective netting 5. One end of the tensioning component is detachably connected to the connecting ring 6, and the other end is connected to the connecting component.
[0044] Preferably, refer to Figure 3-4The tensioning assembly includes a U-shaped clip 7, fasteners, a screw 10, a tensioning ring 11, and a limiting pin 12. The U-shaped clip 7 is made of stamped steel plate, and its opening size matches the thickness of the connecting ring 6, allowing it to be precisely clamped on both sides of the connecting ring 6. Both ends of the U-shaped clip 7 have through holes for fasteners. The fasteners consist of a first bolt 8 and nuts 9. The diameter of the first bolt 8 matches the through holes. It passes through the through holes on one side of the U-shaped clip 7, the connecting ring 6, and the other side of the U-shaped clip 7, before being threaded onto two nuts 9. Tightening the nuts 9 secures the U-shaped clip 7 to the connecting ring 6. The screw 10 is made of high-strength threaded steel. One end is vertically welded to the middle of the U-shaped clip 7, and the other end extends away from the through holes. The length of the screw 10 is set according to the tensioning requirements, typically 10cm-20cm. Tensioning ring 11 is an elliptical metal ring, with its major axis aligned with the extension direction of screw 10. The end of screw 10 furthest from U-shaped clip 7 passes through tensioning ring 11 and is threadedly connected to it. Rotating tensioning ring 11 adjusts the extension length of screw 10, achieving the tensioning function. Limiting pin 12 is a cylindrical metal pin, vertically welded to the end of screw 10 furthest from U-shaped clip 7. The diameter of limiting pin 12 is larger than the inner diameter of tensioning ring 11, preventing screw 10 from completely disengaging from tensioning ring 11 and ensuring connection stability.
[0045] More preferably, the connecting assembly includes a threaded sleeve 13 and a second bolt 14. The threaded sleeve 13 is made of seamless steel pipe with internal threads. During the casting of the lattice beam 2, the threaded sleeve 13 is pre-installed inside the lattice beam 2, with the opening of the sleeve facing the protective net 5. The sleeve is fixed to the reinforcing bars inside the lattice beam 2 by welding to ensure a firm connection. The diameter of the second bolt 14 matches the internal thread of the threaded sleeve 13. One end of the bolt passes through the other end of the tensioning ring 11 and is threadedly connected to the threaded sleeve 13. Tightening the second bolt 14 can fix the tensioning assembly to the connecting assembly. The axis of the second bolt 14 is collinear with the axis of the screw 10 to ensure that the force direction is consistent.
[0046] Specific construction operation steps of this utility model:
[0047] Step 1, Pre-treatment of slope 1: First, clean the surface of slope 1, remove loose soil, gravel and weeds, and level any uneven areas to ensure that the surface of slope 1 is basically smooth, so as to provide a foundation for subsequent structural construction.
[0048] Step 2, Construction of Grid Beam 2: Based on the design drawings, lay out lines on the surface of slope 1 to determine the position and orientation of Grid Beam 2. Then, tie the reinforcing steel frame of Grid Beam 2. Reserve anchor bolt holes 3 at the intersections of the reinforcing steel frames. On the inner side of Grid Beam 2, along the edge of each grid, install threaded sleeves 13 according to the design spacing, ensuring that the opening of the threaded sleeves 13 faces the inner side of the grid and corresponds to the connecting rings 6 of the protective netting 5. Subsequently, erect the formwork, pour concrete, and vibrate it to ensure compaction. After curing to the design strength, remove the formwork to form the grid-like Grid Beam 2.
[0049] Step 3, Anchor Bolt 3 Installation: Drill holes at the reserved holes at the intersection of the lattice beams 2. The drilling depth is determined according to the height of the slope 1 and the geological conditions, usually 3-6m. Insert the anchor bolt 3 into the drilled hole, and then inject cement grout or cement mortar into the hole to ensure that the grout fills the drilled hole. After the grout solidifies, use nuts 9 to fasten the end of the anchor bolt 3 that is exposed on the surface of the lattice beam 2 to the lattice beam 2.
[0050] Step 4, laying the ecological bags 4: On the surface of slope 1, lay the ecological bags 4 filled with planting soil, grass seeds and fertilizer layer by layer. When stacking, pay attention to the overlap between adjacent ecological bags 4 to ensure that there are no gaps and form a continuous covering layer.
[0051] Step 5: Laying and fixing the protective netting 5: Lay the protective netting 5 on the surface of the ecological bag 4, aligning the connecting ring 6 at the edge of the protective netting 5 with the connecting component on the inner side of the lattice beam 2. Then, clamp the U-shaped clip 7 of the tensioning component on both sides of the connecting ring 6, insert the first bolt 8 and tighten the nut 9 to fix the U-shaped clip 7 to the connecting ring 6. Then, pass the second bolt 14 through the other end of the tensioning ring 11 and initially connect it with the threaded sleeve 13.
[0052] Step 6: Tension adjustment of protective net 5: Adjust the extension length of screw 10 by rotating tension ring 11 to gradually tension the protective net 5 and make it fit tightly against the surface of ecological bag 4, ensuring that the protective net 5 provides effective support for ecological bag 4; after adjustment, tighten the second bolt 14 to fix the tensioning component and the connecting component, and complete the construction of the entire structure.
[0053] Through the above structural design and construction steps, the lattice beam 2 structure can not only provide stable protection for slope 1 through lattice beam 2 and anchor rod 3, but also achieve ecological restoration of slope 1 through ecological bag 4 and protective net 5. At the same time, the tension of the protective net 5 can be flexibly adjusted by using tensioning components to ensure long-term stability and reliability of the structure.
[0054] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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.
[0055] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A lattice beam structure for slope protection in geotechnical engineering, characterized in that, include: A grid beam (2) is set on the surface of the slope (1) and is in the shape of a grid. An anchor rod (3) is inserted at the intersection of the grid beam (2). One end of the anchor rod (3) is connected to the grid beam (2) and the other end of the anchor rod (3) is embedded in the slope (1). Ecological bags (4) and protective nets (5) are laid in the grid of the lattice beam (2), with the ecological bags (4) laid on the side of the protective nets (5) close to the slope (1); as well as Multiple sets of connecting components and tensioning components are provided on the inner side of the lattice beam (2) and connected one-to-one. The multiple sets of connecting components and tensioning components are arranged on the periphery of the protective net (5). One of them is connected to the lattice beam (2) and the other is connected to the protective net (5). The tensioning component can tension and pull the protective net (5) by its own extension and contraction.
2. The lattice beam structure for geotechnical engineering slopes according to claim 1, characterized in that, The protective net (5) is provided with multiple connecting rings (6) at intervals around its periphery. The tensioning component is connected to the connecting rings (6) one by one, and the connecting component is connected to the lattice beam (2).
3. The lattice beam structure for geotechnical engineering slopes according to claim 2, characterized in that, The tensioning component includes: The U-shaped clips (7) are clamped on both sides of the connecting ring (6), and each end of the U-shaped clips (7) is provided with a through hole; Fasteners passing through the connecting ring (6) and the two through holes; A screw (10) fixedly connected to the middle of the U-shaped clip (7) and extending away from the through hole; and A tensioning ring (11) is threaded to the screw (10) at one end, and the other end of the tensioning ring (11) is connected to the connecting assembly.
4. The lattice beam structure for geotechnical engineering slopes according to claim 3, characterized in that, The end of the screw (10) away from the U-shaped clip (7) is vertically fixedly connected to a limiting pin (12), which is used to prevent the screw (10) from coming out of the tension ring (11).
5. The lattice beam structure for geotechnical engineering slopes according to claim 4, characterized in that, The tensioning ring (11) is elliptical, and one end of the U-shaped clip (7) of the screw (10) is embedded in the tensioning ring (11).
6. The lattice beam structure for geotechnical engineering slopes according to claim 4, characterized in that, The fasteners are a first bolt (8) and nuts (9). The first bolt (8) passes through the connecting ring (6) and the two through holes and is threaded to the two nuts (9).
7. The lattice beam structure for geotechnical engineering slopes according to claim 5, characterized in that, The connection component includes: A threaded sleeve (13) is fitted into the lattice beam (2), the threaded sleeve (13) having an opening facing the connecting ring (6); and A second bolt (14) is located on the extension line of the screw (10) and passes through the tension ring (11). The second bolt (14) is threadedly connected to the threaded sleeve (13).
8. The lattice beam structure for geotechnical engineering slopes according to claim 1, characterized in that, The eco-bag (4) is made of polypropylene or polyester fiber, and the protective net (5) is made of galvanized steel wire mesh.