A highly protective flexible vertical anti-seepage system

Abstract

The present invention discloses a highly protective flexible vertical anti-seepage system, comprising: a plurality of locking column modules arranged at intervals, wherein the locking column modules include matching grooves or locking embedded parts arranged along their length; an HDPE membrane group including a first HDPE geomembrane and locking parts fixed at both ends thereof, wherein the locking parts are used to connect to the matching grooves or locking embedded parts; and the two ends of the HDPE membrane group are respectively connected to two adjacent locking column modules. The highly protective flexible vertical anti-seepage system of the present invention can achieve the depth of the bentonite mud anti-seepage wall, substantially solving the bottleneck problem that the lower membrane depth of the current domestic HDPE geomembrane anti-seepage wall cannot exceed 30 meters, and provides a highly safe, convenient construction, and reliable option for the field of HDPE geomembrane anti-seepage walls.

Description

Technical Field

[0001] The present invention relates to the technical fields of solid waste landfill, petrochemical industry, water conservancy engineering, urban underground engineering, etc., and in particular to a high-protection flexible vertical anti-seepage system used in related fields. Background Art

[0002] Existing vertical anti-seepage systems generally use concrete anti-seepage walls, clay-bentonite mud anti-seepage walls and HDPE geomembrane anti-seepage walls. Among them, although the HDPE geomembrane anti-seepage wall has a complex process, it can easily meet the low permeability requirements, and its integrity, erosion resistance and durability are relatively good. It has gradually become the future development direction of vertical anti-seepage technology.

[0003] As shown in Chinese patents with publication numbers CN102444145B and CN207143911U, HOPE geomembrane anti-seepage walls typically consist of a porous connection device, an expansion waterstop pad, an HDPE geomembrane, and connecting buckles welded or bonded to the sides of the HDPE geomembrane. The connecting buckle strips on adjacent HDPE geomembranes interlock to form a cavity for the expansion waterstop pad. The HDPE geomembrane and the connecting buckles attached to its sides typically form a membrane module. This is equivalent to multiple modules connected together by the upper and lower interlocking connection buckles, forming a complete vertical flexible barrier system. During the actual installation of the above-mentioned existing vertical flexible barrier system, it is generally necessary to place one of the membrane groups in the process tank first, and then plug in the subsequent membrane groups for installation. Assuming that the membrane group placed first in the process tank is the first membrane group, it will be affected by the tension of the HDPE membrane itself, the buoyancy of the HDPE membrane caused by the protective mud on the wall of the process tank, and the inability of the connecting lock on the first module to be well fixed to the HDPE membrane. This will cause the lock strip end of the first membrane group to bend, twist, and move freely. In the subsequent installation process of the membrane group through the connecting lock, the overall verticality of the connecting lock cannot be guaranteed, which greatly increases the difficulty of installation and may even make the expansion water stop strip difficult to install or unable to be installed vertically and evenly. During the installation process, the expansion water stop strip will be twisted due to the pulling of external force, which is fatal and will directly affect the overall construction quality and anti-seepage coefficient.

[0004] Due to the aforementioned issues, existing vertical anti-seepage systems often fail to reach the preset depth in order to ensure construction quality. Currently, the maximum laying depth abroad is 25 meters, while the theoretical maximum achievable domestically is 30 meters. However, in actual construction, the depth is often much lower, failing to meet higher usage requirements. Once the maximum laying depth is exceeded, a series of problems such as those described above will arise, and these problems are persistent. Because each module is installed in a continuous, spliced ​​manner, the same problems will occur between adjacent modules, making the installation process irreversible and ultimately failing to ensure the integrity of the entire vertical anti-seepage system. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a highly protective flexible vertical anti-seepage system. While ensuring the integrity of the entire anti-seepage system, it has the advantages of being simple and easy to use, a single HDPE membrane group can be replaced, and high construction efficiency. At the same time, it also achieves a significant increase in the actual laying depth, which can reach more than 50 meters.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a highly protective flexible vertical anti-seepage system, comprising: a plurality of locking column modules arranged at intervals, the locking column modules including matching grooves or locking embedded parts arranged along their length; an HDPE membrane group including a first HDPE geomembrane and locking parts fixed at both ends thereof, the locking parts being used to connect to the matching grooves or locking embedded parts; the two ends of the HDPE membrane group being respectively connected to two adjacent locking column modules. The locking column module itself has high strength, bending resistance, and anti-seepage coefficient. Using it as the intermediate connection hub in the entire vertical anti-seepage system can effectively overcome the problems of unstable connection and deformation of the connection caused by excessive laying depth, thereby achieving a higher laying depth than the existing technology.

[0007] In the above technical solution, the locking column module further includes two mating grooves arranged opposite each other along its length. These mating grooves are provided with embedded locking parts that engage with the locking parts. The mating gap between the embedded locking parts and the locking parts is filled with an expansion water stop strip. This expansion water stop strip gradually expands upon contact with water, thereby preventing leakage between the embedded locking parts and the locking parts, thereby ensuring the strength of the connection between the two.

[0008] In the above technical solution, a second HDPE geomembrane is further fixedly connected between two opposing locking fasteners on the same locking column module. The second HDPE geomembrane covers a portion of the outer wall of the locking column module, forming a vertical anti-seepage barrier composed of the first HDPE geomembrane, the locking fasteners, the embedded locking fasteners, and the second HDPE geomembrane. Furthermore, the ends of the second HDPE geomembrane can be extended to abut against the first HDPE geomembrane. This arrangement ensures the integrity of the vertical anti-seepage barrier, preventing leakage.

[0009] In the above technical solution, further, the locking embedded part is provided with a locking hole running through along the length direction thereof, and the locking part is provided with an extension ring sleeve which can be inserted into the locking hole.

[0010] In the above technical solution, further, a plurality of water stop strip engaging teeth are provided on the inner side of the clamping hole, the extended ring sleeve is in a semi-open ring shape, and the inner wall of the extended ring sleeve is provided with water stop strip pre-limiting teeth extending inward, and the expansion water stop strip is fixed on the inner wall of the extended ring sleeve and presses against the inner side of the clamping hole after expansion, and cooperates with the water stop strip engaging teeth to form convex ribs. With this arrangement, during installation, the expansion water stop strip can be pre-clamped on the extended water stop strip pre-limiting teeth, and after being plugged into place, the convex ribs formed by the expansion of the expansion water stop strip can effectively increase the contact area between the expansion water stop strip and the inner side of the clamping hole, thereby improving its sealing and structural strength.

[0011] In the above technical solution, further, L-shaped slots are provided on both sides of the locking embedded part, and the locking part is provided with an L-shaped clip that engages with the L-shaped slots.

[0012] In the above technical solution, further, in order to adapt to different anti-seepage heights, several locking column modules can be spliced ​​along the length direction.

[0013] In the above technical solution, further, the connection point of the second HDPE geomembrane on the two longitudinally adjacent locking column modules is covered with a sealing film. This arrangement realizes the anti-seepage coating of the connection point and ensures the overall anti-seepage effect.

[0014] In the above technical solution, a splicing structure is further provided between two longitudinally adjacent locking column modules. The splicing structure includes a first connector and a second connector, and the first connector and the second connector are respectively fixedly mounted at the ends of the two locking column modules. The first connector and the second connector are secured by a plurality of fixing columns and / or bolts. The first connector and the second connector can be integrally formed and disposed at the upper and lower ends of the locking column modules, thereby enabling rapid installation of the locking column modules while ensuring structural strength.

[0015] The beneficial effects of the present invention are:

[0016] 1. The locking column modules used in this invention have high strength, bending resistance, and anti-seepage coefficient. Using them as the intermediate connecting hub of the entire vertical anti-seepage system can effectively overcome the problems of unstable connections and deformation at the joints caused by excessive laying depths, thereby achieving a higher laying depth than existing technologies.

[0017] 2. The smooth insertion and matching of the locking buckle embedded parts on the locking column module and the locking buckle parts on the HDPE membrane group, supplemented by the recyclable auxiliary membrane installation device installed at the bottom of the locking column module, can make the membrane installation simple and fast, and can be constructed simultaneously at multiple points in the entire vertical anti-seepage system without interfering with each other;

[0018] 3. The higher paving depth can reach a relatively impermeable layer, thereby ensuring that pollutants cannot seep through the bottom seepage layer of the anti-seepage system, thereby better improving the anti-seepage effect;

[0019] 4. During installation, the expansion waterstop can be pre-engaged on the extended waterstop pre-limiting teeth. After being inserted into place, the ribs formed by the expansion of the expansion waterstop can effectively increase the contact area between the expansion waterstop and the inner side of the locking hole, thereby improving its sealing and structural strength.

[0020] 5. Most existing vertical anti-seepage systems use porous connection devices and do not have the locking column module proposed in the present invention, making it impossible to replace the local HDPE membrane group. The present invention adopts a modular design of the HDPE membrane group, which can easily solve the maintenance and replacement problems without incurring large material costs and manpower.

[0021] In summary, the high-protection flexible vertical anti-seepage system proposed in the present invention is of revolutionary significance in this field, breaking the technical barriers that various existing flexible vertical anti-seepage walls cannot achieve deep construction and reliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a top view of the overall structure of the present invention.

[0024] Figure 2 The present invention Figure 1 Enlarged schematic diagram of point A in the middle.

[0025] Figure 3 It is a structural schematic diagram of the lock buckle embedded part of the present invention.

[0026] Figure 4It is a structural schematic diagram of the locking member of the present invention.

[0027] Figure 5 It is a structural schematic diagram showing the matching state of the locking embedded part and the locking part of the present invention, and the expansion water stop strip in the expanded state.

[0028] Figure 6 It is a schematic structural diagram of the HDPE membrane group of the present invention.

[0029] Figure 7 It is a structural schematic diagram of the locking column assembly of the present invention.

[0030] Figure 8 It is a schematic diagram of the use of the cavity protection plate and the junction box of the present invention.

[0031] The reference numerals in the figures are:

[0032] 1. Locking column module, 11. Matching groove, 12. First connecting member, 13. Second connecting member;

[0033] 2. Locking buckle embedded parts, 21. Clamping hole, 211. Water stop strip bite teeth, 22. L-shaped slot;

[0034] 3. HDPE membrane group, 31. First HDPE geomembrane, 32. Locking piece, 321. Extension ring, 3211. Waterstop pre-limiting teeth, 322. L-shaped clamping strip;

[0035] 4. Expansion water stop, 41. Convex rib;

[0036] 5. Second HDPE geomembrane; 6. Sealing membrane; 7. Splicing structure; 8. Locking column assembly; 9. Cavity protection plate; 10. Joint box. DETAILED DESCRIPTION

[0037] Reference Figure 1-8The figure shows a specific embodiment of the invention: a highly protective, flexible vertical anti-seepage system comprising: a plurality of spaced-apart locking column modules 1, each comprising two opposing mating grooves 11 along its length, each provided with a locking embedded part 2 for engaging with a locking member 32; an HDPE membrane assembly 3 comprising a first HDPE geomembrane 31 and locking members 32 secured at each end thereof, the locking members 32 being connected to the locking embedded parts 2; the two ends of the HDPE membrane assembly 3 being connected to two adjacent locking column modules 1, respectively, and the mating gap between the locking embedded parts 2 and the locking members 32 being filled with an expansion waterstop 4. The locking column modules 1 inherently possess high strength, bending resistance, and anti-seepage coefficient. Using them as the intermediate connecting hub of the entire vertical anti-seepage system effectively overcomes the problems of unstable connections and deformation at the joints caused by excessively high laying depths, thereby achieving a higher laying depth than the prior art. The expansion water stop strip 4 will gradually expand after encountering water, thereby preventing leakage between the locking embedded part 2 and the locking part 32, thereby ensuring the connection strength between the two.

[0038] To ensure the integrity of the vertical anti-seepage barrier and prevent leakage, a second HDPE geomembrane 5 is fixedly connected between two opposing locking members 32 on the same locking column module 1. The second HDPE geomembrane 5 covers a portion of the outer wall of the locking column module 1, forming a vertical anti-seepage barrier composed of the first HDPE geomembrane 31, the locking members 32, the locking embedded parts 2, and the second HDPE geomembrane 5. Furthermore, the ends of the second HDPE geomembrane 5 can be extended to abut against the first HDPE geomembrane 31 to further enhance the anti-seepage effect.

[0039] To ensure smooth connection between the embedded lock component 2 and the locking component 32, facilitating installation, the embedded lock component 2 is provided with a latching hole 21 extending along its length, and the locking component 32 is provided with an extension ring 321 that can be inserted into the latching hole 21. L-shaped latching grooves 22 are also provided on both sides of the embedded lock component 2, and the locking component 32 is provided with an L-shaped latching strip 322 that engages with the L-shaped latching grooves 22.

[0040] In order to improve the sealing and structural strength of the connection structure. The inner side of the clamping hole 21 is provided with a plurality of longitudinally arranged water stop strip engaging teeth 211, the extended ring sleeve 321 is in a semi-open ring shape, and the inner wall of the extended ring sleeve 321 is provided with water stop strip pre-limiting teeth 3211 extending inward, and the expansion water stop strip 4 is fixed on the inner wall of the extended ring sleeve 321 and presses against the inner side of the clamping hole 21 after expansion, and cooperates with the water stop strip engaging teeth 211 to form a rib 41. With this arrangement, during installation, the expansion water stop strip 4 can be pre-clamped on the extended water stop strip pre-limiting teeth 3211. After being plugged into place, the rib 41 formed by the expansion of the expansion water stop strip 4 can effectively increase the contact area between the expansion water stop strip 4 and the inner side of the clamping hole 21, thereby improving its sealing and structural strength.

[0041] To accommodate different anti-seepage heights, several locking column modules 1 can be spliced ​​lengthwise. Furthermore, the connection point between the second HDPE geomembranes 5 of two longitudinally adjacent locking column modules 1 is covered with a sealing film 6. This arrangement provides an anti-seepage coating at the connection point, ensuring overall anti-seepage effectiveness.

[0042] Furthermore, in order to achieve the upper and lower connection of the locking column module 1, a splicing structure 7 is provided between the two longitudinally adjacent locking column modules 1, and the splicing structure 7 includes a first connecting member and a second connecting member, and the first connecting member and the second connecting member are respectively fixedly installed at the ends of the two locking column modules 1, and the first connecting member and the second connecting member are fixed by a number of fixing columns and bolts. The first connecting member and the second connecting member can be provided at the upper and lower ends of the locking column module 1 in an integrally formed manner, thereby enabling rapid installation between the locking column modules 1 while ensuring structural strength. As another connection method, the splicing structure 7 can also be formed by using male and female fasteners fixedly preset on the locking column module 1 to form a mutual connection, on the premise of ensuring that the strength, stability and verticality of the connection between the two meet the requirements.

[0043] The working principle / implementation process of the highly protective flexible vertical anti-seepage system is briefly described below: First, according to the scope of anti-seepage required by the vertical anti-seepage system, a required number of locking column modules 1 are prefabricated. Here, the locking column module 1 is made of reinforced concrete. Generally, during the molding process of the locking column module 1, the locking embedded parts 2 are placed in the matching grooves 11 in the locking column module 1. After the locking column module 1 is solidified and formed to reach the required strength, a second HDPE geomembrane 5 is wrapped on one side of the surface of the locking column module 1, and the two ends of the second HDPE geomembrane 5 are welded to the locking embedded parts 2. According to the preset height of the anti-seepage system, multiple locking column modules 1 with second HDPE geomembranes 5 welded thereto are longitudinally spliced ​​to form a locking column assembly 8. Here, the second HDPE geomembranes 5 on the locking column module 1 are all located on the same side, and the sealing film 6 is wrapped on the connection position between adjacent second HDPE geomembranes 5 to ensure sealing and anti-seepage. Similarly, multiple locking column assemblies 8 as described above are prefabricated. Next, multiple groups of locking column assemblies 8 are placed at set positions in the pre-dug process trench by hoisting, and a first HDPE geomembrane 31 of appropriate length is selected according to the spacing between two adjacent groups of locking column assemblies 8, and locking parts 32 are welded at both ends of the first HDPE geomembrane 31 to form the HDPE membrane group 3.

[0044] Next comes the membrane lowering stage of this vertical anti-seepage system. Here, a cavity protection plate 9 is first placed on one side of one of the locking column assemblies 8 by hoisting. The protrusion of the cavity protection plate 9 is inserted into the matching groove 11 on this side and pressed against the locking column assembly 8. A junction box 10 with high weight and stability is placed on the other side of the cavity protection plate 9, and the cavity protection plate 9 is limited by the junction box 10.

[0045] Next, a recyclable auxiliary membrane lowering device is provided at the bottom of the locking column assembly 8. The auxiliary membrane lowering device adopts the existing technology commonly used in this field, which will not be elaborated here. The auxiliary membrane lowering device is used to assist in hanging the HDPE membrane group 3 from top to bottom and placing it between the two locking column assemblies 8 (here, the connection between the HDPE membrane group 3 and the locking column assembly 8 is achieved by plugging and engaging between the locking member 32 and the locking embedded member 2. In addition, a placement position will be reserved between the locking member 32 and the locking embedded member 2 for placing the expansion water stop strip 4, and the expansion water stop strip 4 is pre-stuck on the locking member 32). After the HDPE membrane group 3 is placed, backfill is filled in the groove between the two groups of locking column assemblies 8. The purpose of re-backfilling is to protect and fix the HDPE membrane group 3 in time to ensure the anti-seepage effect, and it is also convenient for construction to avoid damage to it during construction, which meets the construction requirements. At the same time, the backfill itself has a good anti-seepage coefficient, which can also enhance the anti-seepage effect. It's important to emphasize that the cavity protection plate 9 and joint box 10 prevent the protected mating groove 11 from becoming blocked during backfilling, facilitating subsequent splicing. Furthermore, if one of the HDPE membrane modules 3 in the vertical anti-seepage system leaks or becomes damaged, it can be readily replaced, ensuring reversibility.

[0046] According to the actual requirements of the construction site, the above-mentioned steps of hoisting the locking column assembly 8 and lowering the HDPE membrane group 3 are repeated to finally complete the construction of the entire vertical anti-seepage system.

[0047] In the final vertical anti-seepage system, the effect presented is equivalent to connecting adjacent HDPE membrane groups 3 through the design of the locking column assembly 8 structure. The number of locking column modules 1 can be freely increased according to the depth of the process tank. The adjacent modules can be easily assembled by plugging the locking member 32 and the locking embedded member 2. Due to the extremely tight connection between the locking column modules 1, the structure of the locking column assembly 1 is extremely stable and will not be affected by the tension of the first HDPE membrane 31 group or the filling mud. The structure composed of multiple mutually spliced ​​locking embedded members 2 is straight and smooth. The locking member 32 can be easily inserted into the locking embedded member 2, and the lower membrane is simple. In addition, the expansion water stop 4 can be pre-installed on the locking member 32 and then plugged into the locking embedded member 2 at the same time without any distortion. The subsequent HDPE membrane group 3 can also be simply and quickly installed through the bridging of the locking column assembly 8, ultimately forming a complete vertical anti-seepage system. This solution ensures the speed and quality of construction, breaks the technical barriers of various existing flexible vertical anti-seepage walls that cannot achieve deep construction and reliable connection, and can realize multi-point cross-synchronous operation, enabling safe and fast deep construction.

[0048] The above is only one embodiment of the present invention and does not limit the present invention in any form. Simple modifications, equivalent changes or modifications made without departing from the technical solution of the present invention all fall within the scope of protection of the present invention.

Claims

1. A high-protection flexible vertical anti-seepage system, characterized in that: include: A plurality of locking column modules are arranged at intervals, each of which includes two mating grooves arranged opposite to each other along its length, each of which is provided with a locking embedded part that engages with the locking part; each of which is provided with a locking hole extending along its length, and L-shaped slots are also provided on both sides of the locking embedded part; The HDPE film assembly includes a first HDPE geomembrane and locking members fixed at both ends thereof, wherein the locking members are provided with an extension ring sleeve that can be inserted into the clamping hole and an L-shaped clamping strip that is clamped with the L-shaped clamping groove; The fitting gap between the locking embedded part and the locking part is filled with an expansion water stop strip; A second HDPE geomembrane is fixedly connected between two opposite locking fasteners on the same locking column module, and the second HDPE geomembrane covers a portion of the outer wall of the locking column module to form a vertical anti-seepage barrier composed of the first HDPE geomembrane, the locking fastener, the locking embedded part, and the second HDPE geomembrane; The two ends of the HDPE film group are respectively connected to two adjacent locking column modules; A splicing structure is provided between two longitudinally adjacent locking column modules, the splicing structure comprising a first connecting member and a second connecting member, and the first connecting member and the second connecting member are respectively fixedly mounted on the ends of the two locking column modules; In order to adapt to different anti-seepage heights, several locking column modules are spliced ​​into a locking column assembly through the first connecting piece and the second connecting piece at the end, and the longitudinally adjacent second HDPE geomembrane connection position is covered with a sealing film; The construction method of the high-protection flexible vertical anti-seepage system is: a. Hoist multiple sets of locking column assemblies to the set positions in the pre-dug process groove; b. A cavity plate and a junction box are provided on one side of one locking column assembly, the convex portion of the cavity plate is inserted into the mating groove on the side and pressed against the locking column assembly, and the junction box is placed on the other side of the cavity plate; c. Place the HDPE membrane group under the auxiliary film device between the two locking column components, so that the lock and the lock embedded parts plug; d. Fill the groove between the two sets of locking column assemblies with backfill; e. Repeat the hoisting of the locking column assembly and the lower mold of the HDPE membrane group to finally complete the construction of the entire vertical anti-seepage system.

2. The high-protection flexible vertical anti-seepage system according to claim 1 is characterized in that: A plurality of water stop strip engaging teeth are provided on the inner side of the clamping hole, the extension ring sleeve is in a semi-open ring shape, and the inner wall of the extension ring sleeve is provided with water stop strip pre-limiting teeth extending inward. The expansion water stop strip is fixed on the inner wall of the extension ring sleeve and is pressed against the inner side of the clamping hole after expansion, and cooperates with the water stop strip engaging teeth to form a convex rib.

3. The high-protection flexible vertical anti-seepage system according to claim 1 is characterized in that: The first connecting member and the second connecting member are fixed by a plurality of fixing columns and / or bolts.

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