A geomembrane vertical laying device with trough electromagnetic support function

Abstract

The invention discloses a geomembrane vertical laying device with electromagnetic support function for a trough, including an upright horizontal bracing system and a pull-down transmission system; the upright horizontal bracing system includes multiple space grids, and electromagnetic devices are installed on the opposite sides of the multiple space grids, and the electromagnetic devices are used to realize the suction and separation of two relative space grids inside the trough; a driving wheel is installed on the upper part of the space grid, and a driven wheel matched with the driving wheel is installed on the lower part; the pull-down transmission system includes a driving device and a film laying device, the driving device is connected to the driving wheel and the driven wheel through the transmission device, one end of the geomembrane is connected to the film laying device, and the other end is connected to the transmission device through a rope, and the vertical laying of the geomembrane is realized through the driving device, the transmission device and the film laying device. The invention has large spatial rigidity and reasonable structural force, realizes the coordinated vertical laying of the geomembrane and the trough support, and improves the construction efficiency and safety of the vertical laying of the geomembrane.

Description

Technical Field

[0001] The invention relates to the technical field of water and soil pollution barrier technology, and in particular to a geomembrane vertical laying device with a trough electromagnetic support function. Background Art

[0002] With the rapid increase in urbanization and industrialization, the output of urban domestic waste and industrial waste is increasing day by day, and tens of thousands of domestic waste landfills and mining waste rock dumps have emerged. Due to the limited level of early design, construction, and operation and maintenance, most of these solid waste disposal sites have bottom leakage problems or hidden dangers, exposing the surrounding water and soil to huge pollution risks, seriously threatening the life safety and health of nearby residents.

[0003] In order to achieve rapid and effective control of pollution sources and prevent the pollution scope from further expanding, a 60-100 cm thick underground waterproof curtain is usually built outside the pollution scope and penetrates into the impermeable layer according to the engineering geology and hydrogeology conditions of the site. As a new type of waterproof curtain, the flexible vertical anti-seepage wall is formed by vertically placing geomembrane units of specific sizes into pre-excavated trenches, using special waterproof connection components to achieve the fit of adjacent membrane units, and cooperating with plastic recharging materials to form a continuous and complete composite anti-seepage wall. The flexible vertical anti-seepage wall has low permeability (permeability coefficient ≤1.0×10 -7 It has the advantages of high speed, low cost, high stability, high stability, high efficiency, and high cost-effectiveness. It has become the preferred technology for underground engineering anti-seepage, especially in the field of water and soil pollution prevention, and has been widely used.

[0004] The vertical laying of geomembranes is a critical part of the construction process of flexible vertical anti-seepage walls, but it still faces many challenges:

[0005] (1) During the vertical laying process, the strong frictional resistance of the water-stop connection components between the membrane units must be overcome. Due to the objective conditions of the flexible material properties of the membrane and the spatial characteristics of the groove, the existing geomembrane vertical laying processes and equipment generally have problems such as insufficient stiffness and stability of the force transmission mechanism, limited laying depth, and long time consumption;

[0006] (2) The laying of geomembrane prolongs the exposure time of the trench, resulting in reduced stability and increased displacement of the trench, threatening the safety of construction work and surrounding structures and underground pipelines. Summary of the invention

[0007] In view of the shortcomings in the prior art, the present invention provides a geomembrane vertical laying device with trough electromagnetic support function, which realizes the coordinated vertical laying of geomembrane and trough support, overcomes the problems of limited vertical laying depth of geomembrane and decreased trough stability with increasing exposure time, and improves the safety, economy and efficiency of large-depth flexible vertical anti-seepage wall construction.

[0008] The invention discloses a geomembrane vertical laying device with a trough electromagnetic support function, comprising an upright horizontal support system for stabilizing the trough and a pull-down transmission system for laying the geomembrane;

[0009] The upright horizontal bracing system comprises a plurality of space grids, and electromagnetic devices are installed on the opposite sides of the plurality of space grids, and the electromagnetic devices are used to realize the attraction and separation of two opposite space grids inside the tank body; a driving wheel is installed on the upper part of the space grid, and a driven wheel cooperating with the driving wheel is installed on the lower part;

[0010] The pull-down transmission system includes a driving device and a film laying device. The driving device is connected to the driving wheel and the driven wheel through a transmission device. One end of the geomembrane is connected to the film laying device, and the other end is connected to the transmission device through a rope. The vertical laying of the geomembrane is achieved through the driving device, the transmission device and the film laying device.

[0011] As a further improvement of the present invention, the electromagnetic device is an electromagnetically welded ribbed hollow ball, and the electromagnetically welded ribbed hollow ball comprises a ribbed hollow ball, an electromagnet and an annular water stop strip;

[0012] The ribbed hollow sphere is composed of two ribbed hollow hemispheres, the outer diameter of the ribbed hollow sphere is not less than 120 mm, the wall thickness is not less than 10 mm, and a semi-annular rib plate with a thickness of not less than 10 mm and an inner diameter of not less than 100 mm is arranged inside. One pole of the ribbed hollow sphere is provided with a concave semicircular ring with an outer diameter of not less than 80 mm and an inner diameter of not less than 40 mm, and the other pole is provided with a semicircular plane with an outer diameter of not less than 60 mm, and bolt holes are arranged on the semicircular plane.

[0013] As a further improvement of the present invention, the electromagnet is made of an iron core wound with copper wire, the iron core is located inside the ribbed hollow ball, the middle part of the iron core is a cylinder with a diameter of not less than 40 mm and a height of not less than 75 mm, one end of the iron core is a first disc with a diameter of not less than 80 mm and a thickness of not less than 5 mm, and the other end is a second disc with a diameter of not less than 60 mm and a thickness of not less than 5 mm, and two bolt rods with a length of not less than 20 mm are provided at the bottom of the second disc;

[0014] The first disc is tightly fitted with the concave semicircular ring, the second disc is tightly fitted with the inner side of the semicircular plane, the bolt rod extends from the bolt hole on the hemispherical circular plane and is fastened by a nut.

[0015] The electromagnet is connected to a control device via a cable, and the control device is used to power on and off the electromagnet.

[0016] As a further improvement of the present invention, the annular waterstop strip is placed at the contact surface between the first disc, the second disc and the ribbed hollow sphere, the cross-section of the annular waterstop strip is circular, the cross-section diameter is not less than 1 mm, and the diameter of the annular waterstop strip is not less than 50 mm.

[0017] As a further improvement of the present invention, the width of the space grid is 3 to 4 meters, the height is 300 to 350 mm, and the length is greater than the depth of the vertical anti-seepage wall. When two space grids are vertically arranged inside the trough, the spacing is 5 to 10 cm.

[0018] As a further improvement of the present invention, the space grid comprises a plurality of one-way folding line space grids, and the one-way folding line space grids are composed of a plurality of bolt ball nodes, a plurality of electromagnetic welded ribbed hollow ball nodes and a plurality of webs;

[0019] The bolt ball node is composed of four upper chord rods and a bolt ball, the axes of the upper chord rods intersect at the center of the bolt ball and are fastened and connected by high-strength bolts;

[0020] The electromagnetic welded ribbed hollow sphere node is composed of a plurality of lower chord rods and an electromagnetic welded ribbed hollow sphere, the axes of the lower chord rods intersect at the center of the electromagnetic welded ribbed hollow sphere, and are connected by welding;

[0021] The web is placed between the bolt ball node and the electromagnetic welded ribbed hollow ball. One end of the web is connected to the bolt ball via a high-strength bolt, and the other end is connected to the electromagnetic device.

[0022] As a further improvement of the present invention, the upper chord, the lower chord and the web are all non-magnetic alloy structural steel with a diameter of not less than 30 mm, a wall thickness of not less than 4 mm and a length of not less than 230 mm;

[0023] An earth pressure bearing plate is welded to the end of the short support rod outside the bolt ball node. The length and width of the earth pressure bearing plate exceed the edge of the space grid, and the distance from the center of the bolt node at the edge of the space grid is not less than 100 mm.

[0024] As a further improvement of the present invention, the upright horizontal bracing system further comprises two horizontal stable grids;

[0025] The horizontal stable grid includes a two-way orthogonal space grid and a triangular space grid, the two-way orthogonal space grid includes an upper chord, a lower chord, a web and a bolt ball, the two-way orthogonal space grid is placed on a hardened floor and connected to the top of the space grid;

[0026] The triangular space grid includes support rods and bolt balls. The triangular space grid is backed by the space grid and is placed above the two-way orthogonal space grid. It is connected to the two-way orthogonal space grid and the bolt balls of the space grid by bolts.

[0027] As a further improvement of the present invention, the driving device includes a winch, and the transmission device includes a sleeve-type transmission chain, through which the winch is connected to the driving wheel and the driven wheel;

[0028] The driving wheel comprises four sprockets with a diameter of not less than 150 mm and a width of not less than 20 mm, and the driven wheel comprises two sprockets with a diameter of not less than 150 mm and a width of not less than 20 mm; the two outer sprockets of the driving wheel are connected to the winch through the transmission chain, and the two inner sprockets are connected to the driven wheel through the transmission chain.

[0029] As a further improvement of the present invention, the film laying device includes a film rolling drum and a film spreading drum, the film spreading drum is placed on the top of the space grid, one end of the geomembrane is wound on the film rolling drum, and the other end is spanned on the film spreading drum, and a long steel sheet with a straight hook is fixed on one end of the geomembrane spanning the film spreading drum;

[0030] The straight hook is connected to the transmission chain through a geotextile rope. When the winch rotates, the transmission chain rotates around the driving wheel and the driven wheel, and at the same time pulls the geomembrane into the bottom of the trough. When the winch reverses, the geotextile rope detaches from the straight hook and returns to the slot with the transmission chain, completing the laying of the geomembrane.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention vertically places the upright horizontal support system into the bottom of the vertical anti-seepage trench filled with wall-protecting mud, and by applying an adjustable current, a strong electromagnetic repulsion force can be formed between the two relative space grids, thereby achieving horizontal support for the vertical anti-seepage trench body within the full depth range, ensuring the stability of the vertical anti-seepage trench body, providing maximum time and space guarantees for construction operations, and greatly alleviating the urgency of construction operations;

[0033] The space grid of the present invention adopts a combination of multiple unidirectional folded-line space grids, has the characteristics of light weight and reasonable force on the rod structure, has a large structural rigidity along the length direction of the trough body, and forms a huge spatial rigidity by utilizing the constraint effect of the trough wall and the strong electromagnetic repulsion distributed on the lower chord surface of the space grid, ensuring that during the vertical laying process of the geomembrane at a great depth, the downward pulling force applied to overcome the friction resistance will not cause the structure to be completely or partially unstable due to compression, and at the same time, by adjusting the current size of the electromagnetic device, the trough body can be stabilized again after a controllable small deformation occurs, and by adjusting the current size, the electromagnetic support repulsion is increased, the original trough body width is restored, and the accuracy and safety of the geomembrane laying construction are improved;

[0034] The space grid of the present invention can be combined by selecting one-way folding line space grids of different numbers and sizes according to the depth of the tank body, and has a wide range of adaptability. Moreover, since multiple one-way folding line space grids are connected by bolts, the device can be disassembled and recycled for reuse, thus saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a side view of a geomembrane vertical laying device with a trough electromagnetic support function disclosed by the present invention;

[0036] Figure 2 It is a schematic diagram of the planar structure of a first space grid equipped with driving wheels and driven wheels in the upright horizontal bracing system disclosed in the present invention;

[0037] Figure 3 It is a schematic diagram of the planar structure of the second space grid without the driving wheel and the driven wheel in the upright horizontal bracing system disclosed in the present invention;

[0038] Figure 4 It is a structural schematic diagram of the electromagnetic welded ribbed hollow ball disclosed in the present invention;

[0039] Figure 5 It is a top view of a geomembrane vertical laying device with a trough electromagnetic support function disclosed by the present invention;

[0040] Figure 6 It is a top view of the second one-way folding line space sub-grid frame without the driving wheel and the driven wheel in the upright horizontal bracing system disclosed in the present invention;

[0041] Figure 7 It is a top view of a third unidirectional folding line space sub-grid equipped with driven wheels in the upright horizontal bracing system disclosed in the present invention;

[0042] Figure 8 It is a schematic diagram of the geomembrane pull-down connection structure in the upright horizontal bracing system disclosed in the present invention;

[0043] Fig. 9 It is a schematic diagram of the vertical anti-seepage corner of a geomembrane vertical laying device with a trough electromagnetic support function disclosed by the present invention.

[0044] In the figure:

[0045] The present invention:

[0046] 1. The first one-way zigzag space sub-grid; 2. The second one-way zigzag space sub-grid; 3. The third one-way zigzag space sub-grid; 4. Bolt ball; 5. Electromagnetic welded ribbed hollow ball; 5-1. Ribbed hollow hemisphere; 5-2. Iron core; 5-3. Copper coil; 5-4. Annular water stop strip; 6. Upper chord rod; 7. Lower chord rod; 8. Web rod; 9. Earth pressure bearing plate; 10. Driving wheel; 11. Driven wheel; 12. Transmission chain; 13 Support rod; 14. Winch; 15. Film rolling drum; 16. Film spreading drum; 17. Weight platform; 18. Geomembrane; 19. Long steel sheet; 20. Straight hook; 21. Geotextile rope; 22. Guide wall; 23. Hardened floor; 24. Trough; 25. Impermeable layer. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0051] like Figure 1-Figure 9 As shown, the present invention discloses a geomembrane vertical laying device with electromagnetic support function for a trough, including an upright horizontal bracing system for stabilizing the trough and a pull-down transmission system for laying the geomembrane; the upright horizontal bracing system includes a plurality of space grids, one side of which is provided with an electromagnetic device, and the electromagnetic device is used to realize the attraction and separation of two opposite space grids inside the trough; a driving wheel 10 is installed on the upper part of the space grid, and a driven wheel 11 cooperating with the driving wheel 10 is installed on the lower part; the pull-down transmission system includes a driving device and a film laying device, the driving device is connected to the driving wheel 10 and the driven wheel 11 through the transmission device, one end of the geomembrane 18 is connected to the film laying device, and the other end is connected to the transmission device through a geotextile rope 21, and the vertical laying of the geomembrane 18 is realized through the driving device, the transmission device and the film laying device.

[0052] like Figure 1-Figure 8 As shown, the first embodiment of a geomembrane vertical laying device with a trough electromagnetic support function disclosed in the present invention includes an upright horizontal support system and a pull-down transmission system for laying geomembrane.

[0053] like Figure 1 As shown, the upright horizontal bracing system of this embodiment includes a first space grid located on the left side of the trough body, a second space grid located on the right side of the trough body and a horizontal stable grid located above the ground plane, wherein a driving wheel 10 is installed on the upper part of the first space grid, and a driven wheel 11 is installed on the lower part. The width of the first space grid and the second space grid is 3 to 5m, and the height is 300 to 350mm. In this embodiment, the preferred width is 3m, the height is preferably 300mm, and the length is greater than the depth of the vertical anti-seepage wall. The lower chord surfaces (opposite surfaces) of the first space grid and the second space grid are respectively welded with electromagnetic devices, and the electromagnetic devices can realize the attraction and disconnection of the two relative space grids.

[0054] like Figure 2-Figure 3As shown, the first space grid and the second space grid of the present embodiment are both composed of a plurality of one-way zigzag space sub-grids, which are respectively a first one-way zigzag space sub-grid 1, a second one-way zigzag space sub-grid 2 and a third one-way zigzag space sub-grid 3 from top to bottom in the vertical direction, wherein the number of the second one-way zigzag space sub-grid 2 can be increased or decreased according to the depth of the trough body 24. Each unidirectional zigzag space sub-grid is composed of a plurality of bolt ball nodes, a plurality of electromagnetically welded ribbed hollow ball nodes and a plurality of web members 8, wherein the bolt ball node is composed of four upper chords 6 and a bolt ball 4, the axes of the four upper chords 6 intersect at the center of the bolt ball 4, and are fastened and connected by high-strength bolts, wherein the diameter of the bolt ball 4 is not less than 100 mm, and 100 mm is preferably used in this embodiment, and a sealing plate with high-strength bolts is welded to the ends of the upper chord 6 and the web member 8, and a long hexagonal sleeve is sleeved on the bolt extending above the sealing plate, and the sleeve and the high-strength bolt are driven to rotate together by inserting the fastening bolts, A high-strength bolt is screwed into the bolt ball 4 to form a bolt ball node. The electromagnetic welded ribbed hollow ball node is composed of multiple lower chord rods 7 and an electromagnetic welded ribbed hollow ball 5. The axes of the multiple lower chord rods 7 intersect at the center of the electromagnetic welded ribbed hollow ball 5, and the connection between the lower chord rods 7 and the electromagnetic welded ribbed hollow ball 5 is achieved by welding. One end of the web rod 8 is connected to the bolt ball 4 using a high-strength bolt, a sealing plate, a sleeve and a fastening screw, and the other end is welded to the electromagnetic welded ribbed hollow ball 5. The web rod 8 is 45 degrees to the upper and lower chord planes, and the four web rods 8 connected to the same bolt ball 4 are in the shape of a regular tetrahedron. A short support rod is welded to the outside of the bolt ball 4, and an earth pressure bearing plate 9 is welded to the short support rod. The length and width of the earth pressure bearing plate 9 exceed the center of the bolt ball node at the edge of the space grid by not less than 100 cm, and 100 cm is preferred in this embodiment. The earth pressure applied inside the trough body 24 is transmitted to each bolt ball 4 through the earth pressure bearing plate 9, ensuring that all rods are two-force rods. The earth pressure bearing plate 9 in this embodiment is composed of a whole rectangular non-magnetic alloy structural steel plate with a thickness of 5 mm.

[0055] Furthermore, the diameters of the upper chord 6, the lower chord 7 and the web 8 of the present embodiment are not less than 30 mm, the wall thickness is not less than 4 mm, and the length is not less than 230 mm. The diameter of the upper chord 6 of the present embodiment is preferably 30 mm, the wall thickness is preferably 4 mm, and the length is preferably 240 mm. The diameter of the lower chord 7 is preferably 30 mm, the wall thickness is preferably 4 mm, and the length is preferably 230 mm. The diameter of the web 8 is preferably 30 mm, the wall thickness is preferably 4 mm, and the length is preferably 240 mm. At the same time, the upper chord 6, the lower chord 7 and the web 8 of the present embodiment are all made of non-magnetic alloy structural steel.

[0056] like Figure 4As shown, the electromagnetic device of this embodiment is an electromagnetically welded ribbed hollow sphere 5, which is composed of two ribbed hollow hemispheres 5-1. An electromagnet is arranged inside the electromagnetically welded ribbed hollow sphere 5. The electromagnet of this embodiment is made of a copper coil 5-3 wrapped around an iron core 5-2. The iron core 5-2 wrapped with the copper coil 5-3 is placed in the ribbed hollow hemisphere 5-1. The two ends of the iron core 5-2 are in close contact with the two poles of the ribbed hollow hemisphere 5-1, and two annular water stop strips 5-4 are installed. The cross-section of the annular water stop strip 5-4 is circular, and the cross-section diameter is not less than 1mm. The cross-section diameter of the annular water stop strip of the present invention is preferably 1mm, and the annular diameter of the annular water stop strip is not less than 50mm. The annular diameter of the annular water stop strip of the present invention is preferably 50mm. After assembly with another ribbed hollow hemisphere 5-1, the connection is achieved by welding.

[0057] Furthermore, the ribbed hollow hemisphere 5-1 of the present embodiment adopts non-magnetic alloy structural steel, the outer diameter of the ribbed hollow hemisphere 5-1 is not less than 120mm, and the wall thickness is not less than 10mm. In the present embodiment, the outer diameter is preferably 120mm, and the wall thickness is preferably 10mm. The thickness of the internal semi-annular ribs is not less than 10mm, and the inner diameter is not less than 100mm. In the present embodiment, the thickness of the internal semi-annular ribs is preferably 10mm, and the inner diameter is preferably 100mm. The arrangement of the semi-annular ribs improves the overall stiffness of the ribbed hollow sphere. One pole of the ribbed hollow sphere is provided with a concave semicircular ring with an outer diameter of not less than 80mm and an inner diameter of not less than 40mm, and the other pole is provided with a semicircular plane with an outer diameter of not less than 60mm. In the present embodiment, the ribbed hollow sphere is preferably provided with a concave semicircular ring with an outer diameter of 80mm and an inner diameter of 40mm, and the other pole is provided with a semicircular plane with an outer diameter of 60mm, and bolt holes are provided in the semicircular plane.

[0058] Furthermore, the iron core 5-2 of this embodiment is made of low carbon steel, and the middle part is a cylinder with a diameter of not less than 40mm and a height of not less than 75mm. The diameter of the cylinder in this embodiment is preferably 40mm, and the height is preferably 75mm. The two ends of the cylinder are discs with diameters of not less than 80mm and 60mm, and thicknesses of not less than 5mm, respectively. One end of the cylinder in this example is a first disc with a diameter of 80mm and a thickness of 5mm, and the other end is a second disc with a diameter of 60mm and a thickness of 5mm, wherein two bolt rods with a length of not less than 20mm extend from the bottom of the second disc, and 20mm is preferably used in this embodiment. After the iron core 5-2 is placed in the ribbed hollow sphere, the first disc of the iron core 5-2 fits tightly with the concave semicircular ring of the ribbed hollow sphere, and the second disc fits tightly with the semicircular plane of the ribbed hollow sphere. At the same time, the bolt rod at the bottom of the second disc passes through the bolt hole of the semicircular plane, and is connected to the ribbed hollow sphere through a nut, further increasing the contact between the electromagnet and the electromagnetic welded ribbed hollow sphere 5. All electromagnetically welded ribbed hollow balls 5 are connected to the on-site control device through cables. The control device is used to power on and off the electromagnetically welded ribbed hollow balls 5 and adjust the current, thereby realizing the attraction or disconnection of the two opposite first space grids and the second space grids, thereby ensuring that the laying progress of the trough body 24 will not be affected by the deformation of the trough body 24 during the laying of the geomembrane 18.

[0059] like Figure 1 As shown, the upright horizontal bracing system disclosed in this embodiment also includes a horizontally stable grid, which includes a two-way orthogonal space grid and a triangular space grid. The two-way orthogonal space grid is composed of an upper chord 6, a lower chord 7 and a bolt ball 4. The two-way orthogonal space grid is placed on a guide wall 22 and a hardened floor 23, and is connected to the bolt ball 4 of the first one-way folded-line space sub-grid 1 of the first space grid and the second space grid; the triangular space grid is composed of a support rod 13 and a bolt ball 4. The triangular space grid is placed on the two-way orthogonal space grid, backed by the first one-way folded-line space sub-grid 1, and is connected to the bolt ball 4 of the two-way orthogonal space grid and the first one-way folded-line space sub-grid 1, forming a horizontally stable grid, which plays a certain supporting role on the first space grid and the second space grid.

[0060] like Figure 5-8 As shown, the driving wheel 10 of this embodiment includes four sprockets with a diameter of not less than 150 mm and a width of not less than 20 mm, and the four driving wheels 10 are symmetrically installed on the upper part of the first unidirectional folded-line space sub-frame 1 of the first space frame, and the driven wheel 11 is composed of two sprockets with a diameter of not less than 150 mm and a width of not less than 20 mm, and the two driven wheels 11 are symmetrically installed on the lower part of the third unidirectional folded-line space sub-frame 3 of the first space frame.

[0061] Furthermore, the geomembrane pull-down transmission device disclosed in this embodiment includes a driving device, a transmission device and a film laying device, wherein the driving device is a winch 14, the winch 14 is installed above the hardened floor 23, and a weight platform 17 is provided at the bottom, the transmission device is a transmission chain 12, and among the four driving wheels 10, the two outer driving wheels 10 are connected to the winch 14 through the transmission chain 12, and the two inner driving wheels 10 are connected to the two driven wheels 11 at the bottom through the transmission chain 12, thereby realizing power transmission between the winch 14 and the driving wheel 10 and the driven wheel 11.

[0062] Furthermore, the film laying device of this embodiment includes a film rolling drum 15 and a film spreading drum 16, wherein the film rolling drum 15 is installed behind the winch 14 and fixed above the same weight platform 17 as the winch 14, and the film spreading drum 16 is installed on the top of the first unidirectional zigzag space sub-grid 1 through high-strength bolts, one end of the on-site geomembrane 18 is wound on the film rolling drum 15, and the other end is spanned above the film spreading drum 16, and one end of the geomembrane 18 spanning above the film spreading drum 16 is fixed with a straight hanging The long steel sheet 19 of the hook 20 connects the straight hook 20 with the transmission chain 12 through the geotextile rope 21, and through the coordinated action with the film rolling drum 15 and the winch 14, the geomembrane 18 is lowered. When the winch 14 rotates, the transmission chain 12 rotates around the driving wheel 10 and the driven wheel 11, and at the same time, the geomembrane 18 is pulled into the bottom of the trough 24. When the winch 14 reverses, the geotextile rope 21 detaches from the straight hook 20 and returns to the slot with the transmission chain 12, completing the vertical film laying work.

[0063] Furthermore, the long steel sheet 19 and the straight hook 20 of this embodiment are both made of non-magnetic alloy structural steel. The film rolling drum 15 of this embodiment is made of stainless steel, with a length of 4.5m and a diameter of 30cm. It is fixed on the weight platform 17 and can rotate around the central axis to transport the geomembrane 18; the film spreading drum 16 is made of non-magnetic alloy structural steel, with a length of 250mm and a diameter of 80mm. It is fixed to the top of the first unidirectional folded-line space sub-grid 1 through a support rod 13 to erect and transport the geomembrane 18. The geomembrane 18 of this embodiment is made of high-density polyethylene material with a thickness of not less than 3mm and a width of not less than 4mm. The thickness of the geomembrane 18 of this embodiment is preferably 3mm and the width is preferably 4mm.

[0064] Furthermore, the transmission chain 12 of this embodiment is of sleeve type and is made of non-magnetic alloy structural steel. The length can be changed by adjusting the number of links. The accessory links of each chain are at the same height. The two ends of the geotextile rope 21 are bound to two adjacent accessories to pull the geomembrane 18.

[0065] The method of using this embodiment is as follows:

[0066] 1) After the road surface is leveled and hardened, and the measurement and setting out of the vertical anti-seepage wall are completed, a guide groove is excavated, the groove depth is not less than 1200mm, and an inverted "L"-shaped reinforced concrete guide wall 22 is made. The bottom surface of the guide wall 22 enters the original soil by not less than 200mm, the top surface width is not less than 1000mm, and the thickness is not less than 200mm; a groove body 24 with a length of 6m, a width of 800mm, a depth of 30m, and a depth of not less than 1.5m into the impermeable layer 25 is completed by a groove forming machine;

[0067] 2) Stack two third unidirectional folding line space sub-grids 3 on the ground, with the two lower chord surfaces facing each other, so that the electromagnetically welded ribbed hollow balls 5 fit one by one, and apply reverse current to the electromagnetically welded ribbed hollow balls 5 to make the two third unidirectional folding line space sub-grids 3 adsorbed together, and use a crane to vertically hoist the adsorbed third unidirectional folding line space sub-grids 3 into the trough 24 filled with mud, so that the top of the third unidirectional folding line space sub-grid 3 is exposed about 1m from the top surface of the guide wall 22, and use three steel pipes across the guide wall 22 to temporarily hang the two third unidirectional folding line space sub-grids 3 in the trough. Apply the same direction current, and the two third unidirectional folding line space sub-grids 3 are separated from each other and support the trough 24 under the action of strong electromagnetic repulsion;

[0068] 3) In the same way, the two second one-way folding line space sub-grids 2 adsorbed together are vertically hoisted to the top of the third one-way folding line space sub-grid 3, and the high-strength bolts at the ends of the upper chord rod 6 and the web rod 8 extending from the top of the third one-way folding line space sub-grid 3 are screwed into the bolt balls 4 at the bottom of the second one-way folding line space sub-grid 2 by using sleeves and fastening screws, so as to complete the extension of the transmission chains 12 on the second one-way folding line space sub-grid 2 and the third one-way folding line space sub-grid 3; after hoisting in place, apply the same direction current, so that the two second one-way folding line space sub-grids 2 and the two third one-way folding line space sub-grids 3 are separated from each other under the action of strong electromagnetic repulsion and support the tank body 24;

[0069] 4) After the two combined grids composed of the horizontal stable grid and the first one-way folding line space sub-grid 1 adsorbed together are hoisted and assembled with the two second one-way folding line space sub-grids 2 and the two third one-way folding line space sub-grids 3, all the transmission chains 14 are firmly connected and then the upright horizontal bracing system is lowered. When the bottom of the horizontal stable grid is about to contact the hardened floor 23, a current in the same direction is applied. Under the action of strong electromagnetic repulsion, the upright horizontal bracing systems are separated from each other, hung on the hardened floor 23 and support the trough body 24;

[0070] 5) Place the weighted platform 17 equipped with the winch 14 and the film rolling drum 15 behind the horizontal stable grid, align the winch 14 with the driving wheel 10, and embed the transmission chain 12 around the two to achieve driving connection. The geomembrane 18 with a length of 31m and a width of 4m has been wound on the film rolling drum 15, and the free end with the long steel sheet 19 and the straight hook 20 is fixed on the film spreading drum 16, and the geotextile rope 21 hangs the straight hook 20. Start the winch 14, and under the drive of the transmission chain 12, the driving wheel 10 and the driven wheel 11 rotate, and the geotextile rope 21 pulls the geomembrane 18 into the bottom of the trough under the drive of the chain;

[0071] 6) The two sides of the geomembrane 18 exposed on the surface are hung with a small gantry, and the winch 14 is started in the reverse direction to lift the geotextile rope 21 to the initial position, and all the transmission chains 12 in the pull-down transmission system are removed and recovered. Turn off the current, release the support of the trough body 24, and slowly lift the upright horizontal support system by crane. After the splicing part of the first unidirectional folding line space sub-grid 1 and the second unidirectional folding line space sub-grid 2 is not less than 0.5m higher than the gantry, two erection steel pipes are used to horizontally pass through the two unidirectional folding line space sub-grids 1 and erect them on the gantry. Apply the same direction current, and after the two second unidirectional folding line space sub-grids 2 and the two third unidirectional folding line space sub-grids 3 support the trough body, remove the connection 2 between the two first unidirectional folding line space sub-grids 1 and the two second unidirectional folding line space sub-grids, apply the reverse current, and the two first unidirectional folding line space sub-grids 1 separated from the device are adsorbed together and transported to the placement location by crane;

[0072] 7) In the same way, dismantle the connection between the two second one-way folding line space sub-grid frames 2 and the two third one-way folding line space sub-grid frames 3, and lift them to the placement location in turn, waiting to be assembled and used again.

[0073] like Fig. 9 As shown, a second embodiment of a geomembrane vertical laying device with a trough electromagnetic support function disclosed in the present invention includes an upright horizontal support system and a pull-down transmission system for laying geomembrane.

[0074] The present embodiment provides a device for vertically laying geomembrane for a flexible vertical anti-seepage wall at a corner, wherein the upright horizontal support system is the same as that in Embodiment 1 and will not be described in detail here. In the pull-down transmission system, the original film laying device is removed and a crane is used to carry out high-altitude lifting and laying of the geomembrane 18. The driving device has the same structure as that in Embodiment 1 and will not be described in detail here.

[0075] The method of using this embodiment is as follows:

[0076] 1) After the road surface is leveled and hardened, and the measurement and setting out of the vertical anti-seepage wall are completed, a guide groove is excavated, the groove depth is not less than 1200mm, and an inverted "L"-shaped reinforced concrete guide wall 22 is made. The guide wall 22 ground enters the original soil by not less than 200mm, the top surface width is not less than 1000mm, and the thickness is not less than 200mm; the groove body 24 of the excavation side at the corner is first completed by a groove forming machine, and the groove body 24 extending 30cm at the corner, with a length of 6m, a width of 800mm, a depth of 30m, and entering the impermeable layer 25 by not less than 1.5m;

[0077] 2) The installation method of the two first one-way folding line space sub-grid frames 1, the two second one-way folding line space sub-grid frames 2 and the two third one-way folding line space sub-grid frames 3 on both sides of the corner is consistent with that in Example 1, and will not be described in detail here;

[0078] 3) After completing the installation of the upright horizontal bracing system, place the weighted platform equipped with the winch 14 behind the horizontal stable grid, align the winch 14 with the driving wheel 10, and embed the transmission chain 12 around the two to achieve drive connection. The crane lifts the geomembrane 18 with a length of 31m and a width of 4m to the trough body 24 at the corner, and the two geotextile ropes 21 adjacent to the left and right of the corner on the two first one-way folding line space grids 1 hang on the straight hooks at the ends of the geomembrane 18. Start the winch 14, and driven by the transmission chain 12, the driving wheel 10 and the driven wheel 11 rotate, and the crane lowers the hook in coordination with the speed of the winch 14. Driven by the chain, the geotextile ropes 21 pull the geomembrane 18 into the bottom of the trough;

[0079] 4) The dismantling and recovery methods of the two first one-way zigzag space sub-grids 1, the two second one-way zigzag space sub-grids 2, the two third one-way zigzag space sub-grids 3 and the horizontal stable grid are consistent with the method in Example 1 and will not be elaborated here.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A geomembrane vertical laying device with trough electromagnetic support function, characterized in that: It includes an upright horizontal bracing system for stabilizing the trough and a pull-down transmission system for laying geomembrane; The upright horizontal bracing system comprises a plurality of space grids, and electromagnetic devices are installed on the opposite sides of the plurality of space grids, and the electromagnetic devices are used to realize the attraction and separation of two opposite space grids inside the tank body; a driving wheel is installed on the upper part of the space grid, and a driven wheel cooperating with the driving wheel is installed on the lower part; The pull-down transmission system includes a driving device and a film laying device, wherein the driving device is connected to the driving wheel and the driven wheel through a transmission device, one end of the geomembrane is connected to the film laying device, and the other end is connected to the transmission device through a rope, and the vertical laying of the geomembrane is achieved through the driving device, the transmission device and the film laying device; The electromagnetic device is an electromagnetically welded ribbed hollow ball, and the electromagnetically welded ribbed hollow ball comprises a ribbed hollow ball, an electromagnet and an annular water stop strip; The space grid comprises a plurality of one-way folding-line space grids, which are composed of a plurality of bolt ball nodes, a plurality of electromagnetically welded ribbed hollow ball nodes and a plurality of web bars; The bolt ball node is composed of four upper chord rods and a bolt ball, the axes of the upper chord rods intersect at the center of the bolt ball and are fastened and connected by high-strength bolts; The electromagnetically welded ribbed hollow sphere node is composed of a plurality of lower chord rods and an electromagnetically welded ribbed hollow sphere, the axes of the lower chord rods intersect at the center of the electromagnetically welded ribbed hollow sphere, and are connected by welding; The web bar is placed between the bolt ball node and the electromagnetic welded ribbed hollow ball. One end of the web bar is connected to the bolt ball through a high-strength bolt, and the other end is connected to the electromagnetic device.

2. The geomembrane vertical laying device with trough electromagnetic support function according to claim 1 is characterized in that: The ribbed hollow sphere is composed of two ribbed hollow hemispheres, the outer diameter of the ribbed hollow sphere is not less than 120 mm, the wall thickness is not less than 10 mm, and a semi-annular rib plate with a thickness of not less than 10 mm and an inner diameter of not less than 100 mm is arranged inside. One pole of the ribbed hollow sphere is provided with a concave semicircular ring with an outer diameter of not less than 80 mm and an inner diameter of not less than 40 mm, and the other pole is provided with a semicircular plane with an outer diameter of not less than 60 mm, and bolt holes are arranged on the semicircular plane.

3. The device for vertically laying geomembrane with electromagnetic support function for a trough according to claim 2 is characterized in that: The electromagnet is made of an iron core wound with copper wire, the iron core is located inside the ribbed hollow ball, the middle of the iron core is a cylinder with a diameter of not less than 40 mm and a height of not less than 75 mm, one end of the iron core is a first disc with a diameter of not less than 80 mm and a thickness of not less than 5 mm, and the other end is a second disc with a diameter of not less than 60 mm and a thickness of not less than 5 mm, and two bolt rods with a length of not less than 20 mm are provided at the bottom of the second disc; The first disc is tightly fitted with the concave semicircular ring, the second disc is tightly fitted with the inner side of the semicircular plane, the bolt rod extends from the bolt hole on the semicircular plane and is fastened by a nut; The electromagnet is connected to a control device via a cable, and the control device is used to power on and off the electromagnet.

4. The device for vertically laying geomembrane with electromagnetic support function for a trough according to claim 3 is characterized in that: The annular water stop strip is placed at the contact surface between the first disc, the second disc and the ribbed hollow sphere. The cross section of the annular water stop strip is circular, the cross section diameter is not less than 1 mm, and the diameter of the annular water stop strip is not less than 50 mm.

5. The device for vertically laying geomembrane with electromagnetic support function for a trough according to claim 2 is characterized in that: The width of the space grid is 3 to 4 meters, the height is 300 to 350 mm, and the length is greater than the depth of the vertical anti-seepage wall. When two space grids are vertically arranged inside the trough body, the spacing is 5 to 10 cm.

6. The geomembrane vertical laying device with trough electromagnetic support function according to claim 1 is characterized in that: The upper chord, the lower chord and the web are all made of non-magnetic alloy structural steel with a diameter of not less than 30 mm, a wall thickness of not less than 4 mm and a length of not less than 230 mm; An earth pressure bearing plate is welded to the end of the short support rod outside the bolt ball. The length and width of the earth pressure bearing plate exceed the edge of the space grid and the distance from the center of the bolt node at the edge of the space grid is not less than 100 mm.

7. The device for vertically laying geomembrane with electromagnetic support function for a trough according to claim 1, characterized in that: The upright horizontal bracing system also includes two horizontal stable grids; The horizontal stable grid includes a two-way orthogonal space grid and a triangular space grid, the two-way orthogonal space grid includes an upper chord, a lower chord, a web and a bolt ball, the two-way orthogonal space grid is placed on a hardened floor and connected to the top of the space grid; The triangular space grid includes support rods and bolt balls. The triangular space grid is backed by the space grid and is placed above the two-way orthogonal space grid. It is connected to the two-way orthogonal space grid and the bolt balls of the space grid by bolts.

8. The device for vertically laying geomembrane with electromagnetic support function for a trough according to claim 1 is characterized in that: The driving device includes a winch, and the transmission device includes a sleeve-type transmission chain, through which the winch is connected to the driving wheel and the driven wheel; The driving wheel comprises four sprockets with a diameter of not less than 150 mm and a width of not less than 20 mm, and the driven wheel comprises two sprockets with a diameter of not less than 150 mm and a width of not less than 20 mm; the two outer sprockets of the driving wheel are connected to the winch through the transmission chain, and the two inner sprockets are connected to the driven wheel through the transmission chain.

9. The device for vertically laying geomembrane with electromagnetic support function for a trough according to claim 8, characterized in that: The film laying device comprises a film rolling drum and a film spreading drum, wherein the film spreading drum is placed on the top of the space grid, one end of the geomembrane is wound on the film rolling drum, and the other end is spanned on the film spreading drum, and a long steel sheet with a straight hook is fixed on one end of the geomembrane spanning on the film spreading drum; The straight hook is connected to the transmission chain through a geotextile rope. When the winch rotates, the transmission chain rotates around the driving wheel and the driven wheel, and at the same time pulls the geomembrane into the bottom of the trough. When the winch reverses, the geotextile rope detaches from the straight hook and returns to the slot with the transmission chain, completing the laying of the geomembrane.

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