CN113733572B - Construction process for welding joint of new and old impermeable membranes and application thereof - Google Patents

Construction process for welding joint of new and old impermeable membranes and application thereof Download PDF

Info

Publication number
CN113733572B
CN113733572B CN202111191535.8A CN202111191535A CN113733572B CN 113733572 B CN113733572 B CN 113733572B CN 202111191535 A CN202111191535 A CN 202111191535A CN 113733572 B CN113733572 B CN 113733572B
Authority
CN
China
Prior art keywords
old
new
welding
impermeable membrane
impermeable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111191535.8A
Other languages
Chinese (zh)
Other versions
CN113733572A (en
Inventor
赖见吾
熊艺浩
彭群兴
朱世浩
李晨
李栋
周章
王凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANGZHOU MUNICIPAL ENGINEERING MACHINERY CONSTRUCTION CO LTD
Original Assignee
GUANGZHOU MUNICIPAL ENGINEERING MACHINERY CONSTRUCTION CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GUANGZHOU MUNICIPAL ENGINEERING MACHINERY CONSTRUCTION CO LTD filed Critical GUANGZHOU MUNICIPAL ENGINEERING MACHINERY CONSTRUCTION CO LTD
Priority to CN202111191535.8A priority Critical patent/CN113733572B/en
Publication of CN113733572A publication Critical patent/CN113733572A/en
Application granted granted Critical
Publication of CN113733572B publication Critical patent/CN113733572B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/103—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined direct heating both surfaces to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/038—Covering the joint by a coating material
    • B29C66/0382—Covering the joint by a coating material the coating material being in liquid or paste form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/435—Making large sheets by joining smaller ones or strips together
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to a construction process for welding the joint of a new impermeable membrane and an old impermeable membrane, wherein the impermeable membrane is divided into the old impermeable membrane and the new impermeable membrane, and the new impermeable membrane is spliced on one side of the old impermeable membrane: overlapping at least two layers of old impermeable membranes and at least two layers of new impermeable membranes, wherein the overlapping mode is that the old impermeable membranes and the new impermeable membranes are arranged at intervals in the laminating direction; the old impermeable membrane at the lowest layer and the new impermeable membrane at the lowest layer are welded by adopting double-seam hot melting, the old impermeable membrane and the new impermeable membrane at the other positions are welded by adopting single-seam extrusion, and the seam is sealed secondarily by adopting a sealant after each welding. Also relates to the application of the construction process for welding the joint of the new and old impermeable membranes, which is applied to the extension of the refuse landfill. The invention has good anti-seepage effect and higher connection strength, and belongs to the technical field of anti-seepage engineering.

Description

Construction process for welding joint of new and old impermeable membranes and application thereof
Technical Field
The invention relates to the technical field of anti-seepage engineering, in particular to a construction process for welding the joint of a new anti-seepage membrane and an old anti-seepage membrane and application thereof.
Background
In recent years, welding between new and old impermeable membranes is a relatively novel membrane connection processing technology, and compared with a lapping and gluing method, the welding technology has a better seam impermeable effect, so that the welding technology between the new and old impermeable membranes becomes one of hot spots of new and old membrane connection research, and a plurality of engineering implementation cases exist. In actual construction, connection between new and old membranes is a key point for engineering quality control.
In the prior art, the geomembrane is generally welded by double seams, the welding is mostly carried out between single layers, and the multiple layers are only in a stacking and laying relationship.
From the prior documents and engineering cases, a construction technology for connecting new and old impermeable membranes by combining hot-melt welding and single-seam extrusion welding is not available for a long time.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: provides a construction process for welding the joint of the new and old impermeable membranes, which has firm connection and high sealing degree.
Another object of the invention is: provides the application of the construction process for welding the joint of the new and old impermeable membranes.
In order to achieve the purpose, the invention adopts the following technical scheme:
a construction process for welding the joint of a new anti-seepage film and an old anti-seepage film comprises the steps that the anti-seepage films are divided into the old anti-seepage film and the new anti-seepage film, the new anti-seepage film is spliced on one side of the old anti-seepage film, at least two layers of the old anti-seepage film and at least two layers of the new anti-seepage film are mutually lapped, and the old anti-seepage film and the new anti-seepage film are arranged at intervals in the laminating direction in a lapping mode; the old impermeable membrane at the lowest layer and the new impermeable membrane at the lowest layer are welded by double seam hot melting, the old impermeable membrane and the new impermeable membrane at the adjacent other positions are welded by single seam extrusion, and the seams are sealed secondarily by sealant after each welding. After the arrangement is adopted, namely double-seam hot melting welding is adopted to connect the new and old films at the lowest layer, so that the integrity of the new and old films is improved, the quality of welding seams at the upper and lower lap joints is ensured, and the welding efficiency is improved; the new and old films above the lower layer are connected by adopting single-seam extrusion welding, so that the locality of a construction part is overcome, the quality of a welding seam at a lap joint is improved, and the connection between the layers is ensured; and the joint is sealed for the second time by adopting the sealant, so that the secondary protection effect is achieved.
As an optimal selection, a construction process for welding the joint of the new and old impermeable membranes adopts a lapping mode of the old impermeable membrane under. After the arrangement is adopted, the seepage-proofing effect of the new seepage-proofing film on the upper layer is ensured.
Preferably, the double-seam hot-melting welding position is that the welding seam is positioned between the end part of the old impermeable membrane at the lowest layer and the lower surface of the new impermeable membrane at the lowest layer and is also positioned between the end part of the new impermeable membrane at the lowest layer and the upper surface of the old impermeable membrane at the lowest layer; the single seam extrusion welding position is positioned between the end part of the impermeable membrane of the layer and the upper surface of the next impermeable membrane and also covers the edge of the upper surface of the impermeable membrane of the layer.
Preferably, the width of the welding seam at the double-seam hot melting welding position is 2.5-3 cm; the width of the welding seam at the single seam extrusion welding position is 2-2.5cm, and the height is 2.0-2.5 cm.
Preferably, for the double-seam hot-melt welding, the overlapping width of the old impermeable film and the new impermeable film is 100 to 130 cm; for single seam extrusion welding, the overlap width of the old and new barrier films is 130 to 150 cm.
Preferably, a self-creeping film hot-melt welding machine is adopted for carrying out double-seam hot-melt welding, and a manual welding gun is adopted for carrying out single-seam extrusion welding.
Preferably, the overlapping part of the new impermeable membrane and the old impermeable membrane is bonded by a hot air gun. After the arrangement is adopted, the connection is further strengthened on the basis of realizing the connection of the adjacent impermeable membranes by welding, and the firmness and the air tightness of the connection are improved.
Preferably, each layer of impermeable membrane is detected after the connection is finished, and the operation of the next impermeable membrane is performed after the requirement is met; and after all the anti-seepage membranes are connected, the whole body needs to be detected. By adopting the arrangement, the splicing quality of each layer and the whole is ensured.
An application of a construction process for welding the joint of a new impermeable membrane and an old impermeable membrane is applied to the extension of a refuse landfill.
Preferably, a plurality of old anti-seepage films are paved at the bottom of a garbage piling pool of an existing garbage landfill site, an expanded garbage piling pool is additionally arranged at the joint of the existing garbage piling pool, a plurality of new anti-seepage films are paved at the bottom of the expanded garbage piling pool, and the old anti-seepage films and the new anti-seepage films are spliced by adopting a construction process of welding the joint of the new anti-seepage films and the old anti-seepage films.
The principle of the invention is as follows: the joint of the new and old films at the lowest layer is welded by double-seam hot melting, so that the integrity and the sealing property of the lap joint of the new and old films are improved, and the construction period is saved; the method has the advantages that the method adopts single-side welding at the place where the upper layer of the new and old films is difficult to adopt the double-side welding mode, improves the welding seam quality at the lap joint of the upper layer of the new and old films, and ensures the seepage prevention; the welding seam adopts sealant to carry out secondary sealing on the welding seam, thereby playing a secondary protection role and improving the impermeability of the joint of the new film and the old film.
The invention has the following advantages:
1. can solve the problem that the joint of the new and old impermeable membranes of the expanded refuse landfill is easy to leak, and compared with the traditional construction process, the average minimum density of the welding seam is from 0.93 to 0.94g/m 3 Is increased to 0.949g/m 3 0.94g/m out of specification 3 So that the welding seam between the new film and the old film has better anti-seepage effect.
2. The strength of the joint of the new and old impermeable membranes can be ensured, the lowest breaking strength reaches 43.0N/mm and exceeds the standard requirement of 18.0N/mm, the requirement of tensile crack strength is still met on the basis of the safety coefficient 2, and the percolate is prevented from flowing downwards due to tensile crack generated in the later use process.
3. The method has the advantages that the requirements on the conditions of a construction site are reduced by combining double-seam hot melting welding and single-seam extrusion welding, so that the welding construction quality of the joint of the new and old impermeable membranes in the refuse landfill extension project is met.
4. And the sealant is applied, so that the sealing degree of the welding seam is improved through secondary sealing of the welding seam, and the welding seam is protected.
5. The construction method is simple and easy to understand, and welders can learn the construction sequence and the combination mode to perform welding construction on the basis of being familiar with the two welding processes.
6. The single-seam extrusion welding, the double-seam hot melting welding and the sealant coating process are not crossed, and the multilayer anti-seepage film is welded through the set process combination sequence, so that the construction quality is improved under the characteristic construction condition, the construction task is completed, and the connection of the new anti-seepage film and the old anti-seepage film is improved on the basis of the traditional processPosition seepage resistance (improved by 0.019 g/m) 3 ) Strength (improved to more than two times of standard) and smoothness (error reduced to +/-0.49%) to ensure that the weakest position of the whole anti-seepage system cannot generate quality defects along with time in the later construction process.
Drawings
Fig. 1 is a schematic view of a new and old impermeable film attached by double seam thermowelding.
Fig. 2 is a schematic view of the connection of the new and old impermeable membranes by adopting single-seam extrusion welding.
Fig. 3 is a flow chart of the construction process.
Fig. 4 is a graph showing the connection effect at the junction of the new and old impermeable membranes.
Wherein, 1 is the welding seam of double joint hot melt welding, 2 is the welding seam leak hunting cavity, 3 is the old prevention of seepage membrane of lower floor, 4 is the new prevention of seepage membrane of lower floor, 5 is single joint extrusion welded welding seam, 6 is the old prevention of seepage membrane of second floor, 7 is the new prevention of seepage membrane of second floor, 8 is the old prevention of seepage membrane of superiors, 9 is the new prevention of seepage membrane of superiors.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
A construction process for welding the joint of a new anti-seepage film and an old anti-seepage film comprises the steps that the anti-seepage films are divided into the old anti-seepage film and the new anti-seepage film, the new anti-seepage film is spliced on one side of the old anti-seepage film, at least two layers of the old anti-seepage film and at least two layers of the new anti-seepage film are mutually lapped, and the old anti-seepage film and the new anti-seepage film are arranged at intervals in the laminating direction in a lapping mode; the old impermeable membrane at the lowest layer and the new impermeable membrane at the lowest layer are welded by adopting double-seam hot melting, the old impermeable membrane and the new impermeable membrane at the other positions are welded by adopting single-seam extrusion, and the seam is sealed secondarily by adopting a sealant after each welding.
Fig. 4 shows the overlapping of the old barrier film in a downward manner, wherein the old barrier film is on the left and the new barrier film is on the right. The double-seam hot melting welding part is characterized in that the welding seam is positioned between the end part of the old impermeable membrane at the lowest layer and the lower surface of the new impermeable membrane at the lowest layer, and is also positioned between the end part of the new impermeable membrane at the lowest layer and the upper surface of the old impermeable membrane at the lowest layer; and the single-seam extrusion welding part is positioned between the end part of the impermeable membrane and the upper surface of the next impermeable membrane and also covers the edge of the upper surface of the impermeable membrane.
As shown in fig. 1, double-seam hot-melt welding is adopted between the new and old impermeable films at the lowest layer. The double-seam hot melting welding adopts a novel self-creeping film hot melting welding machine, the welding speed is set to be 2.5m/min, and a welder stably pulls a handle to assist welding at a position which is difficult to weld by self.
The lapping width of the double-seam hot-melt welding is controlled between 100mm and 130mm, so that the part with serious loss of the old film joint is avoided.
Before welding, the film surface of the overlap joint of the new film and the old film within the transverse 200mm range is cleaned, before formal welding, equipment parameters are set according to experience, and a 400 multiplied by 800mm film block is taken for trial welding.
And after the double-seam hot-melting welding construction is finished, performing inflation quality inspection and tension crack, stripping and tightness tests between the double seams.
And (5) coating sealant on the weld joints in time after the double-seam hot-melt welding of the new and old impermeable films on the lowest layer is finished. The sealant adopts the existing liquid macromolecular static sealing material, and the liquid sealant can be directly coated on the joint surface by gluing or can be coated by a scraper or a brush. The glue solution is continuous and uniform during smearing and can not lack glue. The coating thickness depends on the processing precision, flatness, clearance size and other conditions of the joint surface, and is generally 1.5mm-2 mm.
As shown in fig. 2, the old impermeable film of the second layer is lapped on the new impermeable film of the lowest layer, and the lap joint is connected by single-seam extrusion welding.
The single-seam extrusion welding adopts a manual welding gun held by a welder for welding due to the limitation of a field, and the welding speed is kept stable as much as possible.
The lapping width of single-seam extrusion welding is controlled to be 130mm-150mm, the lapping width is properly increased relative to the lapping width of double-seam hot melting welding, and the height of an extrusion welding seam is preferably 2.5 cm.
The overlapped parts of the new and old membranes are bonded by a hot air gun, the temperature of hot air is controlled, the HDPE geomembrane cannot be scalded and cannot be easily torn.
After the welding of the joint of the new and old impermeable membranes of the layer is finished, the new impermeable membrane of the second layer is lapped on the old impermeable membrane of the second layer after meeting the requirement, the single-seam extrusion welding is repeatedly carried out according to the requirement, and the welding of the new and old impermeable membranes of the upper layer is sequentially carried out, wherein in the embodiment, the new and old impermeable membranes are all three layers, as shown in figure 3.
And (4) welding the new anti-seepage film lap joint and the old anti-seepage film on the uppermost layer all the time, and finally carrying out integrity inspection on the anti-seepage system.
The minimum density standard requirement of the impermeable membrane is more than or equal to 0.94g/m 3 The traditional welding combination can reach 0.93g/m under limited conditions 3 -0.94g/m 3 The process combination can reach 0.949g/m 3 As described above.
The tearing strength standard requirement of the impermeable membrane is more than or equal to 18N/mm, the traditional welding combination can reach 15N/mm-30N/mm under limited conditions, and the process combination can reach more than 43N/mm by using the invention.
The standard requirement of the tensile elongation at break of the impermeable membrane is more than or equal to 100 percent, the traditional welding combination can reach 100 to 200 percent under limited conditions, and the process combination can reach more than 556 percent.
The standard requirement of the dimensional stability (flatness) of the impermeable membrane is less than or equal to +/-2%, the traditional welding combination can reach +/-2% - +/-3% under limited conditions, and the process combination can reach +/-0.49% by using the invention.
An application of a construction process for welding a joint of a new impermeable membrane and an old impermeable membrane is applied to the extension of a refuse landfill. The method is characterized in that a plurality of layers of old anti-seepage films are paved at the bottom of a garbage stacking pool of an existing garbage landfill, an extended garbage stacking pool is additionally arranged at the joint of the existing garbage stacking pool, a plurality of layers of new anti-seepage films are paved at the bottom of the extended garbage stacking pool, and the old anti-seepage films and the new anti-seepage films are spliced by adopting a construction process of welding the joint of the new anti-seepage films and the old anti-seepage films.
The invention solves the connection problem of the new and old impermeable membranes in the construction process of the impermeable project by combining the double-seam hot melting welding and the single-seam extrusion welding, has advanced construction process, and effectively avoids the quality problem of incompact welding seams at the connection part of the new and old impermeable membranes in the construction process due to the inapplicability of the construction method.
The number of layers of the barrier film is selected according to the actual needs, except for the manner mentioned in this example. These variations are all within the scope of the present invention.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (10)

1. The utility model provides a new and old prevention of seepage membrane handing-over department welded construction process, prevention of seepage membrane divide into old prevention of seepage membrane and new prevention of seepage membrane, splices new prevention of seepage membrane in one side of old prevention of seepage membrane, its characterized in that: overlapping at least two layers of old impermeable membranes and at least two layers of new impermeable membranes, wherein the overlapping mode is that the old impermeable membranes and the new impermeable membranes are arranged at intervals in the laminating direction; the old impermeable membrane at the lowest layer and the new impermeable membrane at the lowest layer are welded by adopting double-seam hot melting, the integrity of the new and old impermeable membranes is improved, the old impermeable membrane and the new impermeable membrane adjacent to other positions are welded by adopting single-seam extrusion, the connection between the layers is ensured, and the seam is sealed secondarily by adopting a sealant after each welding.
2. The construction process for welding the joint of the new impermeable membrane and the old impermeable membrane according to claim 1, which is characterized in that: the lapping mode with the old impermeable membrane below is adopted.
3. The construction process for welding the joint of the new impermeable membrane and the old impermeable membrane according to claim 2, which is characterized in that: the double-seam hot melting welding part is characterized in that the welding seam is positioned between the end part of the old impermeable membrane at the lowest layer and the lower surface of the new impermeable membrane at the lowest layer, and is also positioned between the end part of the new impermeable membrane at the lowest layer and the upper surface of the old impermeable membrane at the lowest layer; and the single-seam extrusion welding part is positioned between the end part of the impermeable membrane and the upper surface of the next impermeable membrane and also covers the edge of the upper surface of the impermeable membrane.
4. The construction process for welding the joint of the new impermeable membrane and the old impermeable membrane according to claim 3, which is characterized in that: the width of the welding seam at the double-seam hot melting welding position is 2.5-3 cm; the width of the welding seam at the single seam extrusion welding position is 2-2.5cm, and the height is 2.0-2.5 cm.
5. The construction process for welding the joint of the new impermeable membrane and the old impermeable membrane according to claim 1, which is characterized in that: for double-seam hot-melt welding, the overlapping width of the old impermeable film and the new impermeable film is 100-130 cm; for single seam extrusion welding, the overlap width of the old and new barrier films is 130 to 150 cm.
6. The construction process for welding the joint of the new impermeable membrane and the old impermeable membrane according to claim 1, which is characterized in that: double-seam hot melt welding is carried out by adopting a self-creeping film hot melt welding machine, and single-seam extrusion welding is carried out by adopting a manual welding gun.
7. The construction process for welding the joint of the new impermeable membrane and the old impermeable membrane according to claim 1, which is characterized in that: and (3) bonding the lap joint part of the new impermeable membrane and the old impermeable membrane by using a hot air gun.
8. The construction process for welding the joint of the new impermeable membrane and the old impermeable membrane according to claim 1, which is characterized in that: after the connection of each layer of impermeable membrane is finished, detection is carried out, and the operation of the next layer of impermeable membrane is carried out only after the connection of each layer of impermeable membrane meets the requirement; after all the impermeable membranes are connected, the whole body needs to be detected.
9. Use of a construction process for welding the junction of a new and an old impermeable membrane according to any one of claims 1 to 8, characterized in that: the method is applied to the expansion of the refuse landfill.
10. The application of the construction process for welding the joint of the new impermeable membrane and the old impermeable membrane according to claim 9 is characterized in that: the method is characterized in that a plurality of layers of old anti-seepage films are paved at the bottom of a garbage stacking pool of an existing garbage landfill, an extended garbage stacking pool is additionally arranged at the joint of the existing garbage stacking pool, a plurality of layers of new anti-seepage films are paved at the bottom of the extended garbage stacking pool, and the old anti-seepage films and the new anti-seepage films are spliced by adopting a construction process of welding the joint of the new anti-seepage films and the old anti-seepage films.
CN202111191535.8A 2021-10-13 2021-10-13 Construction process for welding joint of new and old impermeable membranes and application thereof Active CN113733572B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111191535.8A CN113733572B (en) 2021-10-13 2021-10-13 Construction process for welding joint of new and old impermeable membranes and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111191535.8A CN113733572B (en) 2021-10-13 2021-10-13 Construction process for welding joint of new and old impermeable membranes and application thereof

Publications (2)

Publication Number Publication Date
CN113733572A CN113733572A (en) 2021-12-03
CN113733572B true CN113733572B (en) 2022-09-02

Family

ID=78726550

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111191535.8A Active CN113733572B (en) 2021-10-13 2021-10-13 Construction process for welding joint of new and old impermeable membranes and application thereof

Country Status (1)

Country Link
CN (1) CN113733572B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115262655B (en) * 2022-07-29 2023-06-30 广州市第二市政工程有限公司 Construction method for middle sealing field of household garbage sanitary landfill

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103835317A (en) * 2011-12-27 2014-06-04 杭州千禧环保科技有限公司 Refuse landfill seepage-proofing guide drainage system structure and laying method thereof
CN109183854A (en) * 2018-11-06 2019-01-11 北京高能时代环境技术股份有限公司 The construction method of geomembrane
CN110387858A (en) * 2019-08-07 2019-10-29 新疆水利水电科学研究院 The new and old antiseepage film integration interconnection technique of High-cold regions canal modification
CN111516268A (en) * 2020-04-13 2020-08-11 中建三局集团有限公司 Welding and detection process for HDPE (high-density polyethylene) geomembrane of refuse landfill

Also Published As

Publication number Publication date
CN113733572A (en) 2021-12-03

Similar Documents

Publication Publication Date Title
US8133345B2 (en) Method and apparatus for lining process tanks
CA2979063C (en) Method and apparatus for repair of polyolefin pipes and structures
US9278478B2 (en) Methods and apparatus for lining process tanks
US20170369236A1 (en) Liners including corner reinforcement and methods and apparatus for providing additional protection and/or reinforcement at the corners of a liner
EP1807573B1 (en) Drained barrier
CN113733572B (en) Construction process for welding joint of new and old impermeable membranes and application thereof
US10138053B2 (en) Methods and apparatus for lining process tanks
KR100444907B1 (en) Complex waterproof structure using waterproof sheet and a waterproofing method
CN213329697U (en) Planting roof waterproof system
CN207449149U (en) The system of at least two polyolefin tubulose component end opposite ends engagement
CN108386625A (en) A kind of reinforced type prefabricated direct-buried thermal insulation pipe road
CN103774738B (en) The laying method of refuse landfill HDPE floral tube
CN103831973A (en) Garbage landfill site HDPE geomembrane welding method
JP2006125182A (en) Waterproof sheet for repair and repairing structure using it
WO2005095090A1 (en) Sheeting material
US11376783B2 (en) Corner profiles and/or corner reinforcement for liners and linings suitable for use with tanks and other storage/containment vessels
CN217813520U (en) Waterproof construction in sheet T shape node department
KR101053082B1 (en) Waterproof sheet attaching method
CN216380017U (en) Polymer waterproofing membrane and waterproof layer that forms thereof
US11396125B2 (en) Liners and methods of making liners
JP6990625B2 (en) Impermeable structure
JP2010264666A (en) Pipe lining material and method of manufacturing the same
JP5691110B2 (en) Rehabilitation method of existing impermeable sheet
JP5819507B2 (en) Water shielding sheet for mediation joining
CN116556676A (en) HDPE geomembrane construction method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant