One-way geogrid with water guide and drainage and reverse osmosis prevention functions

Abstract

The utility model belongs to the technical field of geogrids, and discloses a one-way geogrid with water guide and drainage and reverse osmosis prevention functions, the one-way geogrid comprises a tiled bottom fabric layer, the bottom fabric layer comprises a flaky geofabric layer, a geotechnical film layer and a geofabric layer which are sequentially arranged from bottom to top, and a plurality of reinforcing ribs are arranged on the bottom fabric layer in parallel at intervals; the length direction of the reinforcing ribs is consistent with the length direction of the bottom fabric layer, a top fabric layer which is welded to the bottom fabric layer in a press fit mode is further laid on the bottom fabric layer, and the top fabric layer is integrally arranged in a continuous concave-convex shape. By arranging the reinforcing ribs, the longitudinal tensile strength of the geogrid can be effectively improved; the top fabric layer wraps the reinforcing ribs in a groove shape at the reinforcing ribs, so that a continuous concave-convex shape is formed on the top surface, and the water guide and drainage and soil body reinforcement effects are improved; and the geomembrane layer of the bottom fabric layer has no water permeability, so that underground water can be effectively prevented from permeating upwards or underground water can be effectively prevented from permeating, and the reverse osmosis prevention function of the geogrid is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geogrids, in particular to a unidirectional geogrid with drainage and reverse seepage prevention functions. Background Art

[0002] Geogrid is a geosynthetic material, commonly used as reinforcement material for roadbed, pavement, culverts, earth slopes and other structures. It can extend the service life of the roadbed, prevent road surface collapse or cracks, keep the ground beautiful and tidy, and prevent soil erosion.

[0003] The most commonly used geogrids are plastic geogrids, steel-plastic geogrids, glass fiber geogrids, and polyester fiber warp-knitted geogrids. The geogrids currently used are all grid-like structures, and generally use coarse-grained soil with a low content of fine particles as fill material to form a reinforced soil structure. However, in engineering practice, based on environmental protection and economic considerations, local materials are often used, and low-permeability soils such as clay are used as structural fillers. However, most grids do not have dedicated drainage channels. When surface water or groundwater infiltrates the filler, excess pore water pressure may be generated, reducing the friction resistance of the reinforcement-soil interface, affecting the reinforcement effect of the grid, and thus reducing the stability of the reinforced soil structure. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a unidirectional geogrid with drainage and reverse seepage prevention functions.

[0005] The above technical purpose of the utility model is achieved through the following technical scheme: a unidirectional geogrid with drainage and anti-reverse seepage functions, including a flat bottom fabric layer, on which a plurality of reinforcing ribs are arranged in parallel and at intervals, and the length direction of the reinforcing ribs is consistent with the length direction of the bottom fabric layer, and a top fabric layer is also laid on the bottom fabric layer and press-welded thereto, and the top fabric layer is arranged in a continuous concave-convex shape as a whole.

[0006] Furthermore, the bottom fabric layer includes a sheet-like geotextile layer, a geomembrane layer, and a geotextile layer which are arranged in sequence from bottom to top.

[0007] Furthermore, the reinforcing ribs are polyester tows or fiber-plastic reinforcing belts formed by stacking a number of polyester filaments.

[0008] Furthermore, the top fabric layer is a sheet-like geotextile.

[0009] In summary, the utility model has the following beneficial effects: in the present application, a three-layer structure of a bottom fabric layer, a reinforcement rib and a top fabric layer is set to constitute the geogrid, and the reinforcement rib can be used to effectively improve the longitudinal tensile strength of the geogrid, and the bottom fabric layer and the top fabric layer wrap the reinforcement rib to avoid contact between the reinforcement rib and the outside world, and protect the reinforcement rib to give full play to the excellent performance of the reinforcement rib; the top fabric layer wraps the reinforcement rib in a groove shape at the reinforcement rib, thereby forming a continuous concave and convex shape on the top surface, and the top fabric layer between two adjacent reinforcement ribs is concave to form a drainage ditch, which improves the drainage and soil reinforcement effect; the bottom fabric layer is composed of a geotextile layer, a geomembrane layer and a geotextile layer stacked together, and the geomembrane layer is not water permeable, which can effectively prevent groundwater from seeping up or ground water from seeping down, thereby improving the anti-reverse seepage function of the geogrid. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the geogrid of an embodiment of the utility model;

[0011] Figure 2 This is a schematic diagram of the production equipment layout of the geogrid of the utility model embodiment;

[0012] Figure 3 It is a schematic diagram of the equipment structure of the ultrasonic welding system and the finished product winding system of the embodiment of the utility model;

[0013] Figure 4 It is a schematic diagram of the planar layout of the bottom fabric unwinding system, the reinforcing rib unwinding system, and the top fabric unwinding system of an embodiment of the utility model.

[0014] In the figure: 1, bottom fabric layer; 2, reinforcing ribs; 3, top fabric layer; 10, bottom fabric unwinding system; 11, unwinding roller; 12, first guide flattening roller; 13, first automatic tensioning roller; 20, reinforcing rib unwinding system; 21, unwinding frame; 22, second guide flattening roller; 23, second automatic tensioning roller; 24, third guide flattening roller; 25, third automatic tensioning roller; 30, top fabric unwinding system; 40, ultrasonic welding system; 41, ultrasonic welding die head; 42, ultrasonic transducer; 43, ultrasonic generator; 44, telescopic cylinder; 45, pressing welding roller; 50, finished product winding system; 51, gravity tensioning roller; 52, lower traction roller; 53, upper traction pressure roller; 54, lower guide roller; 55, upper guide pressure roller; 56, winding roller. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0016] like Figure 1-4 As shown, the embodiment of the present application discloses a unidirectional geogrid with drainage and anti-reverse seepage functions, including a bottom fabric layer 1, reinforcing ribs 2 and a top fabric layer 3, wherein the reinforcing ribs 2 are arranged between the bottom fabric layer 1 and the top fabric layer 3, and a plurality of reinforcing ribs 2 are arranged in parallel and spaced apart along the width direction of the grid, and are completely wrapped by the bottom fabric layer 1 and the top fabric layer 3, and the bottom fabric layer 1 and the top fabric layer 3 are connected together by compression welding to form a whole, and the longitudinal tensile strength of the entire grid can be effectively enhanced by the arrangement of the reinforcing ribs 2, and the bottom fabric layer 1 and the top fabric layer 3 completely wrap the reinforcing ribs 2, thereby avoiding contact between the reinforcing ribs 2 and external soil, etc., and protecting the reinforcing ribs 2, so that the reinforcing ribs 2 can always exert excellent tensile properties.

[0017] In the specific setting, the bottom fabric layer 1 is laid flat on the bottom, including a sheet geotextile layer, a geomembrane layer, and a geotextile layer arranged from bottom to top. The geomembrane layer has waterproof properties and can effectively prevent groundwater from seeping up or groundwater from seeping down, so that the entire geogrid has anti-reverse seepage capabilities. The upper and lower geotextile layers protect the geomembrane layer to prevent the geomembrane layer from being worn out by direct contact with the soil, affecting the waterproof performance. The length direction of the reinforcement 2 is consistent with the length direction of the bottom fabric layer 1, and is laid on the bottom fabric layer 1 in parallel and at intervals. The reinforcement 2 can be made of fiber-plastic reinforcement tape or polyester tow. The fiber-plastic reinforcement tape can also be replaced by a poly-cool PET reinforcement tape or a polypropylene PP reinforcement tape, all of which are single strips. The polyester tow is formed by stacking a number of polyester filaments, which are integrated into a tow under the constraint of the top fabric layer 3. The top fabric layer 3 is a sheet geotextile, and the top fabric layer 3 is in the same direction as the bottom fabric layer 1 and is laid on the top fabric layer 3. Due to the presence of the reinforcing ribs 2, the top fabric layer 3 forms a groove with an opening downward at the reinforcing ribs 2 to accommodate and wrap the reinforcing ribs 2, so that the top fabric layer 3 is arranged in a continuous concave-convex shape as a whole. After the overall compression welding, the bottom of the geogrid is a flat surface, and the top is a continuous concave-convex surface. Specifically, the top is convex where there are reinforcing ribs 2, and concave where there are no reinforcing ribs 2, so that a drainage ditch is formed between two adjacent reinforcing ribs 2, which is convenient for guiding and draining the accumulated water in the backfill soil on the geogrid. In this way, the entire geogrid has drainage and anti-reverse seepage functions when actually used.

[0018] The embodiment of the present application also discloses a production process of a one-way geogrid with drainage and anti-reverse seepage functions, including a bottom fabric unwinding system 10, a reinforcing rib unwinding system 20, a top fabric unwinding system 30, an ultrasonic welding system 40 and a finished product winding system 50. Specifically, the bottom fabric unwinding system 10 includes an unwinding roller 11, a plurality of first guide flattening rollers 12 arranged at intervals, and a first automatic tensioning roller 13 located near the ultrasonic welding system 40. After being unwound by the unwinding roller 11, the bottom fabric passes through the first guide flattening roller 12 and the first automatic tensioning roller 13 in sequence and enters the ultrasonic welding system 40. The unwinding roller 11, the first guide flattening roller 12, and the first automatic tensioning roller 13 are all long rollers. Two unwinding rollers 11 are arranged at intervals, and the upper ones are used to place the bottom fabric roll; the first guide flattening rollers 12 are arranged at intervals from the unwinding roller 11 toward the ultrasonic welding system 40, so that the bottom fabric is flattened on both sides of the forward direction during the forward process; the first automatic tensioning roller 13 makes the bottom fabric be tensioned before entering the ultrasonic welding system 40, so that the bottom fabric is better fitted with the reinforcing rib material and the top fabric, so as to improve the pressing welding quality and the flatness after welding.

[0019] The reinforcement unwinding system 20 includes a plurality of unwinding racks 21 for conveying reinforcement materials, each unwinding rack 21 is provided with two second guide flattening rollers 22 and a second automatic tensioning roller 23, the second automatic tensioning roller 23 is arranged between the two second guide flattening rollers 22, and two third guide flattening rollers 24 and a third automatic tensioning roller 25 are arranged near the ultrasonic welding system 40, the third automatic tensioning roller 25 is arranged between the two third guide flattening rollers 24, the second guide flattening rollers 22 and the third guide flattening rollers 24 arrange the reinforcement materials into bundles according to the set arrangement method on the same column of advancement, the second automatic tensioning roller 23 makes the tensioning force of each wire or reinforcement belt on the same wire bundle consistent, and the third automatic tensioning roller 25 performs secondary tensioning on the reinforcement material before entering the ultrasonic welding system 40 to improve the overall flatness of the grid after forming.

[0020] The top fabric unwinding system 30 includes two rotatably arranged top fabric unwinding rollers and a plurality of guide rollers. Both the top fabric unwinding rollers and the guide rollers are long rollers. The two top fabric unwinding rollers are arranged at intervals and are used to place the top fabric roll. The guide rollers are arranged on the path from the top fabric unwinding system 30 to the ultrasonic welding system 40 to guide and transport the unrolled top fabric to ensure that the top fabric is transported to the ultrasonic welding system 40 in a flat manner.

[0021] The ultrasonic welding system 40 includes a bracket, and six ultrasonic welding heads 41 are arranged along the length direction of the unwinding roller in the bracket. The bottom of the ultrasonic welding head 41 is correspondingly provided with an ultrasonic transducer 42 and an ultrasonic generator 43. A telescopic cylinder 44 is correspondingly provided above each ultrasonic welding head 41. The cylinder body of the telescopic cylinder 44 is fixedly provided at the top of the bracket. The piston rod of the telescopic cylinder 44 is downward and a pressing welding roller 45 is provided at the bottom end. The pressing welding roller 45 cooperates with the ultrasonic welding head 41 to press and weld the bottom fabric layer 1 and the top fabric layer 3. A groove is provided on the middle roller body of the pressing welding roller 45 to cooperate with the reinforcing rib 2, so as to avoid the top fabric layer 3 at the reinforcing rib 2 from convexly affecting the welding. A material combination platform is provided on the feeding side of the ultrasonic welding head 41. The material combination method is that the bottom fabric layer 1 is first laid on the material combination platform, and then the six polyester tows are placed on the bottom fabric layer 1 at intervals, and finally the top fabric layer 3 covers the reinforcing rib 2 and the bottom fabric layer 1. After the three-layer material is laid on the material combination platform, it enters between the ultrasonic welding die head 41 and the pressing welding roller 45 for pressing welding, and after welding, it continues to be transported backward to the finished product winding system 50.

[0022] The finished product winding system 50 includes a traction roller group, a gravity tensioning roller 51, a guide roller group, and a winding roller group arranged in sequence at the rear side of the ultrasonic welding system 40. The traction roller group is arranged on the vertical column at the rear side of the bracket, including a lower traction roller 52 and an upper traction pressure roller 53 arranged vertically. The lower traction roller 52 is rotatably arranged on the vertical column, and the upper traction pressure roller 53 is slidably arranged on the vertical column through a lifting cylinder, which is convenient for unloading and loading. The gravity tensioning roller 51 is located below the traction roller group to tension the grid, making the roll more compact, reducing the roll diameter, increasing the loading capacity, and saving transportation costs. The guide roller group includes a vertical pole set on the rear side and a lower guide roller 54 and an upper guide pressure roller 55. The lower guide roller 54 is rotatably arranged on the vertical pole, and the upper guide pressure roller 55 is vertically slidably arranged on the vertical pole through a lifting cylinder. The lower guide roller 54 and the upper guide pressure roller 55 cooperate to guide the pressed grid. The upper traction roller 53 and the upper guide roller 55 are provided with grooves corresponding to and similar to the pressing and welding roller 45. The winding roller group includes two winding rollers 56 arranged horizontally at intervals, and the top of the winding roller 56 is arranged flush with the lower guide roller 54 to roll the pressed grid into a roll.

[0023] The specific production process includes the following steps:

[0024] Step 1: Place the rolled bottom fabric, reinforcing rib material, and top fabric on the bottom fabric unwinding system 10, the reinforcing rib unwinding system 20, and the top fabric unwinding system 30 respectively;

[0025] Step 2: The bottom fabric unwinding system 10, the reinforcement unwinding system 20, and the top fabric unwinding system 30 lay the bottom fabric, reinforcement material, and top fabric on the material assembly platform in the order of bottom, middle, and top. The reinforcement material is arranged in 6 groups at intervals. The assembled three layers of materials are simultaneously conveyed into the ultrasonic welding system 40;

[0026] Specifically, the bottom fabric is unwound by the unwinding roller 11, and then passes through the first guide flattening roller 12 and the first automatic tensioning roller 13 in sequence before entering the ultrasonic welding system 40; the reinforcing rib material is released from each unwinding rack 21 and transported forward by the second guide flattening roller 22, the second automatic tensioning roller 23, and the second guide flattening roller 22, and is arranged into bundles in the same forward column according to the set arrangement method, and then the reinforcing rib bundles are tensioned for the second time by the third guide flattening roller 24, the third automatic tensioning roller 25, and the third guide flattening roller 24 before entering the ultrasonic welding system 40; the top fabric is unwound by the top fabric unwinding roller, and then guided by the guide roller before entering the ultrasonic welding system 40.

[0027] Step 3: The ultrasonic welding die head 41 and the pressing welding roller 45 of the ultrasonic welding system 40 press-weld the bottom fabric and the top fabric. The top fabric wraps the reinforcing rib 2 in a groove shape at the reinforcing rib 2, and the top fabric and the bottom fabric are attached at the place where there is no reinforcing rib 2;

[0028] Step 4: After the pressing and welding, the finished product is continuously conveyed forward to enter the finished product winding system 50 for winding.

[0029] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. One-way geogrid with drainage and anti-reverse seepage functions, characterized by: The invention comprises a flat bottom fabric layer (1), on which a plurality of reinforcing ribs (2) are arranged in parallel and at intervals, and the length direction of the reinforcing ribs (2) is consistent with the length direction of the bottom fabric layer (1); and on the bottom fabric layer (1) is also laid a top fabric layer (3) which is press-welded thereto, and the top fabric layer (3) is arranged in a continuous concave-convex shape as a whole.

2. The one-way geogrid with drainage and reverse seepage prevention functions according to claim 1 is characterized in that: The bottom fabric layer (1) comprises a sheet-like geotextile layer, a geomembrane layer, and a geotextile layer which are arranged in sequence from bottom to top.

3. The one-way geogrid with drainage and reverse seepage prevention functions according to claim 1 is characterized in that: The reinforcing ribs (2) are polyester tows or fiber-plastic reinforcing belts formed by stacking a number of polyester filaments.

4. The one-way geogrid with drainage and anti-reverse seepage functions according to claim 2 is characterized in that: The top fabric layer (3) is a sheet-like geotextile.

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