CN114059600A - Construction method of high-protection flexible vertical anti-seepage system - Google Patents
Construction method of high-protection flexible vertical anti-seepage system Download PDFInfo
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- CN114059600A CN114059600A CN202111632389.8A CN202111632389A CN114059600A CN 114059600 A CN114059600 A CN 114059600A CN 202111632389 A CN202111632389 A CN 202111632389A CN 114059600 A CN114059600 A CN 114059600A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/004—Sealing liners
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/006—Sealing of existing landfills, e.g. using mining techniques
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0006—Plastics
- E02D2300/0015—HDPE
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2450/00—Gaskets
- E02D2450/10—Membranes
- E02D2450/105—Membranes impermeable
- E02D2450/106—Membranes impermeable for liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/30—Landfill technologies aiming to mitigate methane emissions
Abstract
The invention discloses a construction method of a high-protection flexible vertical anti-seepage system, which ensures the construction rapidity and the construction quality, breaks through the technical barrier that the existing various flexible vertical anti-seepage walls cannot realize large-depth construction and reliable connection, can realize axial cross connection, and can safely and rapidly carry out large-depth construction. Particularly, the depth of the bentonite slurry impervious wall can be realized, the bottleneck problem that the lower film depth of the HDPE geomembrane impervious wall in China cannot exceed 30 meters at present is substantially solved, and a choice with high safety, convenience in construction and high reliability is provided for the field of HDPE geomembrane impervious walls.
Description
Technical Field
The invention relates to the technical fields of solid waste landfill, petrochemical engineering, hydraulic engineering, urban underground engineering and the like, in particular to a construction method of a high-protection flexible vertical anti-seepage system used in related fields.
Background
The existing vertical seepage-proofing system generally adopts a concrete seepage-proofing wall, a clay-bentonite slurry seepage-proofing wall, a HDPE geomembrane seepage-proofing wall and the like, wherein although the process is complex, the HDPE geomembrane seepage-proofing wall can easily meet the requirement of low permeability, and has relatively good integrity, erosion resistance and durability, and the HDPE geomembrane seepage-proofing wall gradually becomes the future development direction of the vertical seepage-proofing technology.
As disclosed in chinese patent nos. CN102444145B and CN207143911U, currently, the HDPE geomembrane impervious wall generally comprises a porous connecting device, an expansion water stop gasket, a HDPE geomembrane and connecting fasteners welded or bonded to both sides of the HDPE geomembrane, wherein the connecting fasteners on adjacent HDPE geomembranes are fastened to each other to form a cavity for installing the expansion water stop gasket. The HDPE geomembrane and the connecting lock catches connected with the two sides of the HDPE geomembrane jointly form a membrane group, so that a plurality of modules are connected into a whole through the up-down opposite insertion of the connecting lock catches to form a complete vertical flexible barrier system. In the actual installation process of the existing vertical flexible barrier system, one of the membrane groups generally needs to be placed in a process tank first, and the subsequent membrane groups are installed in an inserted manner in sequence, assuming that the membrane group placed in the process tank first is the first membrane group, under the tension of an HDPE (high-density polyethylene) membrane, the buoyancy generated by slurry playing a protective role on the wall of the process tank on the HDPE membrane, and the influence of factors such as the failure of a connecting lock catch on the first module to be well fixed with the HDPE membrane, the bending, twisting and free movement of the lock catch strip end of the first membrane group can be caused, the integral verticality of the connecting lock catch can not be ensured in the subsequent insertion installation process of the membrane group through the connecting lock catch, the installation difficulty is greatly increased, even the installation of the expansion water stop strip can be difficult or can not be vertically and uniformly installed, the expansion water stop strip can be twisted due to the pulling of external force in the installation process, which is fatal, the integral construction quality and the seepage-proofing coefficient are directly influenced.
Due to the problems, in order to ensure the construction quality as much as possible, the existing vertical seepage-proofing system cannot reach the preset depth, the maximum laying depth at home is 25 meters, the theoretical maximum laying depth at home is 30 meters, and the vertical seepage-proofing system is lower in the actual construction process, cannot meet higher use requirements and has poor effect. Once the maximum laying depth is exceeded, a series of problems can be caused, the problems are persistent, and as each module is continuously spliced and installed, the same problem can occur in the installation between the adjacent modules, so that the installation process is not reversible, and finally the integrity of the whole vertical seepage-proofing system cannot be ensured.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the construction method of the high-protection flexible vertical anti-seepage system, which has the advantages of simple film laying and higher construction efficiency on the premise of ensuring the integrity of the whole anti-seepage system, and simultaneously realizes the great improvement of the actual laying depth which can reach more than 50 meters.
The technical scheme adopted by the invention for solving the technical problems is as follows: a construction method of a high-protection flexible vertical anti-seepage system comprises the following steps:
s1, digging a process groove with a preset depth and a preset length;
s2, providing a plurality of prefabricated locking column modules;
s3, selecting a proper number of the locking column modules according to the preset depth of the vertical anti-seepage system, and if the selected number is 2 or more, longitudinally splicing the locking column modules in a proper number to form a locking column assembly;
s4, placing at least two groups of locking column assemblies at two positions of a process tank through hoisting;
s5, providing a prefabricated HDPE film group according to the distance between two adjacent groups of locking column assemblies;
s6, connecting the two ends of the HDPE film group between two adjacent locking column assemblies in a matching manner;
s7, filling fillers in the local process groove;
s8, repeating the steps S4-S7, and arranging HDPE film groups between adjacent locking and connecting column assemblies to complete the placement of the high-protection flexible vertical anti-seepage system.
In the above technical solution, further, in the locking column module in step S2, the matching groove and the locking embedded part are fixedly installed on both sides thereof, and the connecting pieces are fixedly installed on both ends thereof.
In the foregoing technical solution, further, in the step S2, one side of the locking column module is coated with a first HDPE geomembrane, and two ends of the first HDPE geomembrane are respectively fixed to the locking embedded part.
In the above technical solution, further, in step S5, a second HDPE geomembrane with a suitable length is selected according to the distance between the two groups of locking post assemblies, and locking fasteners used for being matched with the locking fastener embedded parts are welded at two ends of the second HDPE geomembrane to form the HDPE membrane group.
In the above technical scheme, further, an expansion water stop strip is clamped on the locking fastener.
In the foregoing technical solution, further, in the step S6, the HDPE film set is inserted and connected between two sets of lock post assemblies of S4 from top to bottom by hoisting, and the expansion water stop strip is placed in a gap between the lock fastener and the lock fastener embedded part.
In the above technical solution, further, in step S4 or S6, a cavity protection plate is inserted into a matching groove of one of the lock post assemblies by hoisting, and a joint box is placed on the outer side of the cavity protection plate, so that the inner side of the cavity protection plate is tightly attached to the first HDPE geomembrane and the lock post assembly.
In the foregoing technical solution, further, in step S3, if the number of the selected locking column modules is 2 or more, the locking column assembly is formed by longitudinally splicing the locking column modules through the connecting sheet, so that the length of the locking column assembly matches with a preset depth, and meanwhile, a sealing film is coated at the joint of the locking column modules.
In the above technical solution, in step S7, a fluid type curable mixed filler is filled in a local process groove, and is cured and molded.
The invention has the beneficial effects that:
1. the locking column module adopted in the construction process has higher strength, bending resistance and seepage-proofing coefficient, and can effectively overcome the problems of unstable connection and deformation of a connection part caused by overhigh laying depth by taking the locking column module as a middle connection pivot in the whole vertical seepage-proofing system, thereby achieving higher laying depth compared with the prior art;
2. the film discharging is realized by the smooth splicing matching of the lock catch embedded part on the lock catch column module and the lock catch part on the HDPE module and the recoverable auxiliary film discharging device arranged at the bottom of the lock catch column module, so that the installation is simple and rapid, and the construction can be synchronously carried out at multiple points of the whole vertical anti-seepage system without mutual interference;
3. the invention can realize higher laying depth and reach a relative impermeable layer, thereby ensuring that pollutants cannot seep from a bottom leakage layer of the impermeable system and better improving the impermeable effect;
4. when the expansion water stop strip is installed, the expansion water stop strip can be clamped on the extended water stop strip pre-limiting teeth in advance, and after the expansion water stop strip is inserted in place, the contact area between the expansion water stop strip and the inner side of the clamping hole can be effectively increased through the convex ribs formed by expansion of the expansion water stop strip, so that the sealing property and the structural strength of the expansion water stop strip are improved;
5. the conventional vertical seepage-proofing system and the construction process thereof mostly adopt porous connecting devices and do not have the locking column module, so that the local HDPE module cannot be replaced.
In conclusion, the high-protection flexible vertical anti-seepage system and the construction method thereof provided by the invention have revolutionary significance in the field, and break through the technical barrier that the existing various flexible vertical anti-seepage walls cannot realize large-depth construction and reliable connection.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a top view of the structure during construction of the present invention.
Fig. 2 is an enlarged schematic view at a in fig. 1 of the present invention.
FIG. 3 is a schematic structural view of a locking embedment used in the construction process of the present invention.
Fig. 4 is a schematic structural view of a fastener used in the construction process of the present invention.
Fig. 5 is a schematic structural diagram of the matching state of the locking embedded part and the locking part and the expansion water stop strip in the expansion state in the construction process of the invention.
Fig. 6 is a schematic structural view of an HDPE molding set used in the construction process of the present invention.
Fig. 7 is a schematic structural view of a lock post assembly used in the construction process of the present invention.
FIG. 8 is a schematic representation of the use of the cavity plate and joint box in the construction process of the present invention.
The reference numbers in the figures are:
1. the locking device comprises a locking column module, 11, a matching groove, 12, a first connecting piece and 13, a second connecting piece;
2. 21 parts of a lock catch embedded part, 21 parts of clamping holes, 211 parts of water stop strip engaging teeth and 22 parts of L-shaped clamping grooves;
3, HDPE module 31, second HDPE geomembrane 32, lock catch piece 321, extension ring sleeve 3211, water stop pre-limiting tooth 322, L-shaped clamping strip;
4. an expansion water stop bar, 41, a convex rib;
5. a first HDPE geomembrane; 6. sealing films; 7. splicing structures; 8. a lock post assembly; 9. a cavity protection plate; 10. a joint box; 1A, a filler; and 1B, a process tank.
Detailed Description
Referring to fig. 1-8, the high-protection flexible vertical anti-seepage system for construction molding of the invention is shown as follows: this flexible perpendicular anti-seepage system of high protection includes: the locking column module comprises a plurality of locking column modules 1 arranged at intervals, wherein each locking column module 1 comprises two matching grooves 11 which are oppositely arranged along the length direction of the locking column module, and locking embedded parts 2 used for being in clamping fit with locking parts 32 are arranged on the matching grooves 11; the HDPE film group 3 comprises a second HDPE geomembrane 31 and locking parts 32 fixed at two ends of the second HDPE geomembrane, wherein the locking parts 32 are used for being connected to the locking embedded parts 2; two ends of the HDPE film group 3 are respectively connected to two adjacent locking column modules 1, and an expansion water stop strip 4 is filled in a fit clearance between the locking embedded part 2 and the locking part 32. The locking column module 1 has high strength, bending resistance and seepage-proofing coefficient, can effectively overcome the problems of unstable connection and deformation of a connection part caused by overhigh laying depth by taking the locking column module as a middle connection pivot in the whole vertical seepage-proofing system, and further can achieve higher laying depth compared with the prior art. The expansion water stop 4 gradually expands after meeting water, so that no leakage exists between the lock catch embedded part 2 and the lock catch part 32, and the connection strength between the lock catch embedded part and the lock catch part is further ensured.
To achieve the integrity of the vertical impermeable barrier, no leakage is ensured. A first HDPE geomembrane 5 is fixedly connected between two opposite locking parts 32 on the same locking column module 1, and the first HDPE geomembrane 5 covers part of the outer wall of the locking column module 1 to form a vertical anti-seepage barrier formed by connecting a second HDPE geomembrane 31, the locking parts 32, a locking embedded part 2 and the first HDPE geomembrane 5. Further, the ends of the first HDPE geomembrane 5 may be extended to abut against the second HDPE geomembrane 31 to further enhance the barrier effect.
In order to realize that the lock catch embedded part 2 and the lock catch part 32 can be well inserted and connected, and the construction and installation are convenient, a clamping hole 21 penetrating along the length direction of the lock catch embedded part 2 is arranged on the lock catch embedded part 2, and an extension ring sleeve 321 capable of being inserted into the clamping hole 21 is arranged on the lock catch part 32. The two sides of the lock catch embedded part 2 are also provided with L-shaped clamping grooves 22, and the lock catch part 32 is provided with L-shaped clamping strips 322 which are clamped and matched with the L-shaped clamping grooves 22.
In order to improve the sealing performance and the structural strength of the connecting structure. The inside of card hole 21 is provided with many longitudinal arrangement's sealing rod interlock tooth 211, it is cyclic annular to extend ring cover 321, the inner wall that extends ring cover 321 is provided with the sealing rod that extends inwards and limits the tooth 3211 in advance, inflation sealing rod 4 is fixed in on the inner wall that extends ring cover 321 and support tightly after the inflation the inboard of card hole 21 to with sealing rod interlock tooth 211 cooperation is formed with protruding muscle 41. By the arrangement, when the expansion water stop strip 4 is installed, the expansion water stop strip 4 can be clamped on the extended water stop strip pre-limiting tooth 3211 in advance, and after the expansion water stop strip 4 is inserted in place, the convex rib 41 formed by 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, so that the sealing performance and the structural strength of the expansion water stop strip are improved.
In order to adapt to different anti-seepage heights, a plurality of locking column modules 1 can be spliced along the length direction. Further, the connecting position of the first HDPE geomembrane 5 on two longitudinally adjacent locking column modules 1 is coated with a sealing film 6. By the arrangement, the anti-seepage coating of the connecting position is realized, and the integral anti-seepage effect is ensured.
Further, in order to realize the up-and-down connection of the locking column modules 1, a splicing structure 7 is arranged between the two locking column modules 1, the splicing structure 7 comprises a first connecting piece and a second connecting piece, the first connecting piece and the second connecting piece are respectively and fixedly installed at the end parts of the two locking column modules 1, and the first connecting piece and the second connecting piece are fixed through a plurality of fixing columns and bolts. First connecting piece and second connecting piece accessible integrated into one piece's mode sets up at the upper and lower both ends of lock joint post module 1, and then under the prerequisite of guaranteeing structural strength, can realize the quick installation between the lock joint post module 1. As other connection modes, the splicing structure 7 can also adopt a male and female fastening fitting piece fixedly pre-arranged on the locking column module 1 to form mutual connection, and the connection strength, stability and verticality of the two connection modes can be ensured on the premise that the connection requirements are met.
The construction method of the high-protection flexible vertical anti-seepage system is briefly described as follows:
the method comprises the following steps:
s1, digging a process groove 1B with a preset depth and a preset length;
s2, providing a plurality of prefabricated locking column modules 1, for example, prefabricating the locking column modules 1 made of reinforced concrete material in a mold, and fixedly installing a fitting groove 11 and a locking embedded part 2 on both sides thereof in advance, and fixedly installing connecting pieces on both ends, wrapping a first HDPE geomembrane 5 on one side of the locking column module 1, and respectively fixing both ends of the first HDPE geomembrane 5 on the locking embedded part 2;
s3, selecting a proper number of the locking column modules 1 according to the preset depth of the vertical anti-seepage system, and if the number of the selected locking column modules 1 is 2 or more, realizing longitudinal splicing among the locking column modules 1 through the connecting piece to form a locking column assembly 8, so that the length of the locking column assembly 8 is matched with the preset depth, and meanwhile, coating a sealing film 6 at the connection part of the locking column modules 1;
s4, placing at least two groups of locking column assemblies 8 at two positions of the process tank 1B through hoisting;
s5, providing a prefabricated HDPE film group 3 according to the distance between two adjacent groups of locking column assemblies 8, specifically, selecting a second HDPE geomembrane 31 with a proper length according to the distance between the two groups of locking column assemblies 8, welding locking fasteners 32 used for being matched with the locking fastener embedded parts 2 at two ends of the second HDPE geomembrane 31 to form the HDPE film group 3, and simultaneously clamping expansion water stop strips 4 on the locking fasteners 32;
and S6, connecting the two ends of the HDPE film group 3 between the two adjacent groups of locking column assemblies 8 in a matching way. Specifically, the HDPE film group 3 is connected between two groups of locking post assemblies 8 of S4 in an inserting manner from top to bottom through hoisting, the expansion water stop strip 4 is arranged in a gap between the locking piece 32 and the locking embedded part 2, a cavity protection plate 9 is inserted in an inserting manner through hoisting in a matching groove 11 of one locking post assembly 8, and a joint box 10 is arranged on the outer side of the cavity protection plate 9, so that the inner side of the cavity protection plate 9 is tightly attached to the first HDPE geomembrane 5 and the locking post assembly 8;
s7, filling the local process groove 1B with the filler 1A;
s8, repeating the steps S4-S7, and arranging HDPE film groups 3 between adjacent locking and connecting column assemblies 8 to complete the placement of the high-protection flexible vertical anti-seepage system.
Specifically, firstly, according to the range of the vertical anti-seepage system needing anti-seepage, prefabricating and processing a plurality of required locking column modules 1, wherein the locking column modules 1 are made of reinforced concrete materials, generally, in the forming process of the locking column modules 1, respectively placing locking embedded parts 2 in matching grooves 11 in the locking column modules 1, after the locking column modules 1 are solidified and formed to reach required strength, covering a first HDPE geomembrane 5 on one side of the surface of each locking column module 1, welding two ends of the first HDPE geomembrane 5 on the locking embedded parts 2, longitudinally and mutually splicing a plurality of locking column modules 1 welded with the first HDPE geomembranes 5 according to the preset height of the anti-seepage system to form a locking column assembly 8, wherein the first HDPE geomembranes 5 on the locking column modules 1 are positioned on the same side, and covering sealing films 6 on connecting positions between the adjacent first HDPE geomembranes 5, to ensure sealing and impermeability, a plurality of locking post assemblies 8 as described above are prefabricated. And then, placing a plurality of groups of locking column assemblies 8 at preset positions in the pre-dug process groove 1B by hoisting, selecting a second HDPE geomembrane 31 with a proper length according to the distance between two adjacent groups of locking column assemblies 8, and welding locking fasteners 32 at two ends of the second HDPE geomembrane 31 to form the HDPE membrane group 3.
And then a film laying stage of the vertical seepage-proofing system is carried out, wherein a cavity protecting plate 9 is firstly placed on one side of one of the locking column assemblies 8 through hoisting, a convex part of the cavity protecting plate 9 is inserted into a matching groove 11 on the side and tightly abuts against the locking column assembly 8, a joint box 10 with high weight and stability is placed on the other side of the cavity protecting plate 9, and the cavity protecting plate 9 is limited through the joint box 10.
Then, a recyclable auxiliary lower film device is arranged at the bottom of the locking post assemblies 8, the auxiliary lower film device adopts the prior art commonly used in the field, and details are not repeated herein, the auxiliary lower film device is used for assisting in hanging the HDPE film group 3 from top to bottom and placing the HDPE film group 3 between the two locking post assemblies 8 (here, the connection between the HDPE film group 3 and the locking post assemblies 8 is realized through the inserting and clamping between the locking assemblies 32 and the locking embedded assemblies 2. furthermore, a placing position is left between the locking assemblies 32 and the locking embedded assemblies 2 for placing an expansion water stop strip, the expansion water stop strip 4 is clamped on the locking assemblies 32 in advance, after the HDPE film group is placed, a fluid curable mixed filler 1A (such as concrete) is filled in a groove between the two locking post assemblies 8, after the HDPE film group is cured and molded, the backfill aims at protecting and fixing the HDPE film group 3 in time, the anti-seepage effect is ensured, the construction is convenient, the damage to the filler in the construction process is avoided, the construction requirement is met, and meanwhile, the adopted filler 1A has a good anti-seepage coefficient and can also enhance the anti-seepage effect. It is emphasized that the cavity plate 9 and the joint box 10 herein function to prevent the location of the protected mating groove 11 therein from being clogged during the backfill filling process to facilitate subsequent splicing. Moreover, if one HDPE membrane group 3 in the whole vertical seepage-proofing system in the later stage has a seepage phenomenon or is damaged, the HDPE membrane group can be conveniently replaced at any time, and the reversibility of construction is realized.
According to the actual requirements of a construction site, the procedures of hoisting the locking column assembly 8, film discharging of the HDPE film group 3 and the like are repeated, and finally the construction of the whole vertical anti-seepage system is completed.
In the finally formed vertical anti-seepage system, the displayed effect is equivalent to that the adjacent HDPE film groups 3 are connected by designing the structure of the locking post assembly 8, the number of the locking post modules 1 can be freely added according to the depth of the process groove 1B, and the simple assembly between the adjacent modules is realized by the insertion of the locking part 32 and the locking embedded part 2. Because the concatenation between the lock post module 1 is very tight, can make the structure of lock post subassembly 8 incomparable and stable, can not receive the tension influence of second HDPE membrane group 31, also can not receive the mud influence of packing, the structure that a plurality of hasp built-in fittings 2 of splicing each other are constituteed is straight in the same direction as smooth, can be very easy peg graft hasp piece 32 in the middle of hasp built-in fittings 2, it is simple to descend the membrane, and, can be in advance in the pre-installation inflation sealing rod 4 on hasp piece 32, then can one and peg graft in the middle of hasp built-in fittings 2, any distortion can not take place yet in inflation sealing rod 4, subsequent HDPE membrane group 3 also can be through the bridging of lock post subassembly 8, carry out simple quick installation, finally form complete perpendicular anti-seepage system. The scheme ensures the construction rapidity and the construction quality, breaks through the technical barriers that the existing various flexible vertical impervious walls cannot realize large-depth construction and reliable connection, can realize multipoint cross type synchronous operation, and can safely and quickly carry out large-depth construction.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention in any way, and simple modifications, equivalent changes and modifications may be made without departing from the technical scope of the present invention.
Claims (9)
1. A construction method of a high-protection flexible vertical anti-seepage system is characterized by comprising the following steps:
s1, digging a process groove with a preset depth and a preset length;
s2, providing a plurality of prefabricated locking column modules;
s3, selecting a proper number of the locking column modules according to the preset depth of the vertical anti-seepage system, and if the selected number is 2 or more, longitudinally splicing the locking column modules in a proper number to form a locking column assembly;
s4, placing at least two groups of locking column assemblies at two positions of a process tank through hoisting;
s5, providing a prefabricated HDPE film group according to the distance between two adjacent groups of locking column assemblies;
s6, connecting the two ends of the HDPE film group between two adjacent locking column assemblies in a matching manner;
s7, filling fillers in the local process groove;
s8, repeating the steps S4-S7, and arranging HDPE film groups between adjacent locking and connecting column assemblies to complete the placement of the high-protection flexible vertical anti-seepage system.
2. The construction method of the high-protection flexible vertical seepage-proofing system according to claim 1, wherein the locking column module in the step S2 is fixedly provided with a matching groove and a locking embedded part at two sides and a connecting part at two ends.
3. The method of claim 2, wherein in step S2, a first HDPE geomembrane is wrapped around one side of the locking column module, and both ends of the first HDPE geomembrane are respectively fixed to the locking embedment members.
4. The construction method of the high-protection flexible vertical anti-seepage system according to claim 2, wherein in the step S5, a second HDPE geomembrane with a proper length is selected according to the distance between the two groups of locking post assemblies, and locking fasteners for matching with the locking embedded parts are welded at two ends of the second HDPE geomembrane to form the HDPE membrane group.
5. The construction method of the high-protection flexible vertical seepage-proofing system according to claim 4, wherein an expansion water stop strip is clamped on the locking fastener.
6. The construction method of the high-protection flexible vertical seepage prevention system according to claim 4, wherein in the step S6, the HDPE film set is inserted and connected between the two sets of locking post assemblies of S4 from top to bottom by hoisting, and the expansion water stop strip is placed in the gap between the locking piece and the locking embedded piece.
7. The construction method of the high-protection flexible vertical seepage prevention system according to claim 3, wherein in the step S4 or S6, a cavity protection plate is inserted into a matching groove of one of the locking column assemblies by hoisting, and a joint box is placed on the outer side of the cavity protection plate, so that the inner side of the cavity protection plate is tightly attached to the first HDPE geomembrane and the locking column assembly.
8. The construction method of a high-protection flexible vertical anti-seepage system according to claim 2, wherein in step S3, if the number of the selected locking column modules is 2 or more, the locking column assembly is formed by implementing longitudinal splicing between the locking column modules through the connecting member, so that the length of the locking column assembly matches with a preset depth, and meanwhile, a sealing film is coated at the joint of the locking column modules.
9. The construction method of the high-protection flexible vertical seepage prevention system according to claim 1, wherein in the step S7, the partial process groove is filled with a curable mixed filler in a fluid type, and the curable mixed filler is cured and molded.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5320454A (en) * | 1993-04-29 | 1994-06-14 | Slt Environmental, Inc. | Method and apparatus for installing a flexible panel into a trench |
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| CN214401859U (en) * | 2021-09-03 | 2021-10-15 | 北京高能时代环境技术股份有限公司 | HDPE geomembrane composite anti-seepage wall joint structure |
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| US5320454A (en) * | 1993-04-29 | 1994-06-14 | Slt Environmental, Inc. | Method and apparatus for installing a flexible panel into a trench |
| RU2234567C1 (en) * | 2003-04-28 | 2004-08-20 | Государственное научное учреждение Поволжский научно-исследовательский институт эколого-мелиоративных технологий | Method for sealing functional joints of hydraulic structures, functional joints (variants) and glue composition for sealing thereof |
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| CN114059600B (en) | 2023-01-03 |
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