CN111331849A - Composite HDPE (high-density polyethylene) film prevention and control system for emergency facility base and construction method - Google Patents
Composite HDPE (high-density polyethylene) film prevention and control system for emergency facility base and construction method Download PDFInfo
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- CN111331849A CN111331849A CN202010140710.XA CN202010140710A CN111331849A CN 111331849 A CN111331849 A CN 111331849A CN 202010140710 A CN202010140710 A CN 202010140710A CN 111331849 A CN111331849 A CN 111331849A
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- 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
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- 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
- B29C65/82—Testing the joint
- B29C65/8207—Testing the joint by mechanical methods
- B29C65/8246—Pressure tests, e.g. hydrostatic pressure tests
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- 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
- B29C66/032—Mechanical after-treatments
- B29C66/0324—Reforming or reshaping the joint, e.g. folding over
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- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
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- 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
- B29C66/434—Joining substantially flat articles for forming corner connections, fork connections or cross connections
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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
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/065—HDPE, i.e. high density polyethylene
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a composite HDPE film prevention and control system for an emergency facility base and a construction method, wherein the composite HDPE film prevention and control system comprises: selecting a modular composite HDPE film prevention and control material: the composite HDPE film prevention and control material is a two-cloth one-film which is compounded on site, and the two-cloth one-film consists of an enhanced HDPE geomembrane and a widened geotextile; the quick splicing process comprises the following steps: the rapid splicing process comprises a welding process of the enhanced HDPE geomembrane and a lapping process of the widened geotextile; the welding seam detection process comprises the following steps: the welding seam detection process comprises a one-time pressurizing and pressure-releasing detection method for a full-length welding seam; generic patch means: the universal patch member is a double-layer HDPE film extrusion welded. According to the invention, the high-efficiency pollution prevention and control of the emergency facility base are finally realized through the finished product protection, the quick connection and the detection of the upgradable prevention and control system; the method has the advantages of high standard, high efficiency, short construction period, strong plasticity and easy quality control of the base.
Description
Technical Field
The invention relates to the technical field of emergency prevention and control, in particular to a composite HDPE film prevention and control system for an emergency facility base and a construction method thereof.
Background
In the epidemic prevention and control process, the medical facilities used for the emergency base mainly comprise medical waste water, medical waste disposal facilities, places for temporarily storing the medical waste and the like, the produced pollutants such as the medical waste, the medical waste water, the infectious waste, the domestic waste and the like have strong corrosivity, toxicity, radioactivity and infectivity, and a prevention and control system must be quickly established to efficiently prevent and control the pollutants, prevent the pollutants from seriously influencing the surrounding environment and ensure the safety of soil, underground water and personnel.
At present, in the field of conventional medical waste disposal, although HDPE membranes have applications, the HDPE membranes are not systematic and large-scale; in contrast, the HDPE film anti-seepage construction process and the QA/QC management technology are mature in the field of solid waste landfill, but cannot meet the requirements of high emergency project standard, short construction period, cross-process protection, easiness in base quality control and the like; therefore, how to make the finished product protection of the prevention and control system, how to realize the quick connection and quality assurance of the prevention and control system, how to quickly realize the quality control of the prevention and control system, and the whole prevention and control system needs to be further optimized from the aspects of material selection, construction process, equipment parameters, quality detection and the like.
Disclosure of Invention
In order to solve the technical problems, the invention provides a composite HDPE film prevention and control system for an emergency facility base and a construction method.
The invention discloses a composite HDPE film prevention and control system for an emergency facility base, which comprises:
selecting a modular composite HDPE film prevention and control material:
the composite HDPE film prevention and control material is a two-cloth one-film which is compounded on site, and the two-cloth one-film is composed of an enhanced HDPE geomembrane and a widened geotextile;
the quick splicing process comprises the following steps:
the rapid splicing process comprises a welding process of the enhanced HDPE geomembrane and a lapping process of the widened geotextile, wherein the welding temperature of the welding process is 400-420 ℃, and the welding speed is 3-6 m/min;
the welding seam detection process comprises the following steps:
the welding line detection process comprises a full-length welding line one-time pressurizing and pressure-releasing detection method, wherein the inflation pressure of the full-length welding line one-time pressurizing and pressure-releasing detection method is more than or equal to 300KPa, and the duration time is more than or equal to 1 min;
generic patch means:
the universal patch member is formed by extrusion welding of double-layer HDPE films.
As a further improvement of the invention, the width of the reinforced HDPE geomembrane is more than or equal to 700cm, the elongation at break is more than or equal to 800%, and the right-angle tear resistance is more than or equal to 250N;
the width of the widened geotextile is 420 cm-450 cm, the lapping width of the lapping process is 20 cm-50 cm, and the gram weight of the lapping process is 500-800 g/m2The elongation at break is more than or equal to 100 percent, the bursting strength is more than or equal to 7000N, and the trapezoidal tearing strength is more than or equal to 1000N;
the anti-permeability coefficient of the composite HDPE film prevention and control material reaches 1.0 × 10-12cm/s。
As a further improvement of the invention, the width of the reinforced HDPE geomembrane is 800cm, the width of the widened geotextile is 430cm, and the lap joint width of the lap joint process is 30 cm.
As a further improvement of the invention, the welding temperature of the welding process is 420 ℃, the welding speed is 5m/min, and the reinforced HDPE geomembrane is subjected to rapid hot-melt welding.
As a further improvement of the invention, the one-time pressurization and pressure relief detection method for the through long weld joint is used for carrying out integrity detection on the one-time pressurization and rapid pressure relief of the through long weld joint by adopting a rapid pressurization and pressure relief device and a matched pressure facility.
As a further improvement of the invention, the one-time pressurization and pressure relief detection method for the full-length welding seam comprises the following steps:
sealing two ends of the through long welding seam cavity, and connecting air pressure detection equipment of an air supply device; inserting the needle head into a preset position on the inner side of the cavity on one side, pressurizing the welding seam air cavity to 300kPa by using a pressure detection device, maintaining the air pressure for more than 1min, keeping the air pressure not lower than 300kPa, then opening a hole on the other side of the welding seam for air release, judging the air pressure meter is qualified when the pointer of the air pressure meter rapidly returns to zero, and finally performing repair welding and sealing on the opening.
As a further improvement of the invention, the welding seam detection process also comprises a handheld single-section rapid peeling detection method;
the handheld single-section rapid peeling detection method is used for peeling detection along the edge of a welding seam, and the peeling detection is that the welding seam is not allowed to have a fish mouth.
As a further improvement of the present invention, the method for extrusion welding of a two-layer HDPE film comprises:
prefabricating a double-layer HDPE film which is subjected to film cutting, wiping and roughening;
roughening and welding the damaged part or the part which cannot be subjected to double-seam welding of the enhanced HDPE geomembrane;
covering the position with a prefabricated first HDPE film, and carrying out first layer reinforcement welding;
covering the prefabricated second HDPE film on the first HDPE film, and performing second layer reinforcement welding to realize double-layer HDPE film extrusion welding.
As a further improvement of the invention, the second HDPE film needs to extend at least 20cm beyond the edge of the first HDPE film.
The invention also provides a construction method of the composite HDPE film prevention and control system, which comprises the following steps:
paving the bottom layer of the widened geotextile, and overlapping two adjacent widened geotextiles;
laying the enhanced HDPE geomembranes in the middle layer, and welding two adjacent enhanced HDPE geomembranes;
detecting the welding line of the HDPE geomembrane by adopting a full-length welding line one-time pressurizing and pressure-releasing detection method and/or a handheld single-section quick stripping detection method;
reinforcing and welding the damaged part or the part which cannot be subjected to double-seam welding of the enhanced HDPE geomembrane by adopting a double-layer HDPE film;
and laying the upper layer of the widened geotechnical cloth, and overlapping the two adjacent widened geotechnical cloth.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the HDPE film prevention and control system is subjected to material selection, base rapid splicing process design, base rapid detection method design and universal patch component design, so that the finished product protection, rapid connection and detection of the prevention and control system are upgraded, and the efficient pollution prevention and control of the emergency facility base are finally realized; the method has the advantages of high standard, high efficiency, short construction period, strong plasticity and easy quality control of the base.
Drawings
FIG. 1 is a block diagram of a composite HDPE film containment system for emergency facility bases according to one embodiment of the present disclosure;
FIG. 2 is a schematic diagram of one-time pressurization and pressure relief rapid detection of a full-length weld joint disclosed in one embodiment of the invention;
FIG. 3 is a schematic diagram of a hand-held single-section rapid peeling test according to an embodiment of the present invention;
fig. 4 is a general double-buting member welding diagram according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention is described in further detail below with reference to the attached drawing figures:
the invention provides a composite HDPE film prevention and control system for an emergency facility base and a construction method, the composite HDPE film prevention and control system aims to achieve the effects of seepage prevention, water prevention, moisture prevention and protection, namely completely preventing the pollution and epidemic situation diffusion of medical garbage, medical wastewater, infectious wastes and the like generated by the emergency facility base to soil and underground water; the influence of underground water on emergency facilities is prevented, and a moisture-proof effect is achieved; meanwhile, the design of the composite HDPE film prevention and control system fully considers the potential corrosivity, toxicity, infectivity and even radioactivity of emergency facilities.
As shown in fig. 1, the present invention provides a composite HDPE film prevention and control system for emergency facility base, which is divided into four steps, and sequentially comprises:
1. selecting a modular composite HDPE film prevention and control material:
the composite HDPE film prevention and control material is a field composite two-cloth one-film material, can ensure the highest anti-permeability protection standard, and has the anti-permeability coefficient of 1.0 × 10-12cm/s, and has the characteristics of corrosion resistance, toxicity resistance, radioactivity prevention and strong infection isolation; the two cloth membranes and the one membrane are composed of an enhanced HDPE geomembrane and a widened geotextile;
specifically, the method comprises the following steps:
the width of the enhanced HDPE geomembrane is more than or equal to 700m, preferably 800m, the elongation at break is more than or equal to 800%, and the right-angle tear resistance is more than or equal to 250N; the reinforced HDPE geomembrane is 2.0mm in thickness and 800m in width, is superior to the conventional design with the width of 650cm, and reduces welding seams between the two films; the elongation at break is more than or equal to 800 percent, the right-angle tearing resistance is more than or equal to 250N, the non-uniform settlement and the external stress can be effectively resisted, and the quality control of the whole prevention and control system is facilitated.
The width of the widened geotechnical cloth is 420 cm-450 cm, preferably 430 cm; the lapping width of the lapping process is 20 cm-50 cm, preferably 30 cm; the gram weight is 500-800 g/m2Preferably 600g/m2(ii) a The elongation at break is more than or equal to 100 percent, the bursting strength is more than or equal to 7000N, and the trapezoidal tearing strength is more than or equal to 1000N; the performance of the widened geotextile can comprehensively protect the HDPE film; meanwhile, one end of the widened geotextile is widened by 30cm on the basis of the original width of 400cm, so that the width reaches 430cm, and the geotextile can be easily and rapidly lapped and the quality of the geotextile is ensured.
2. The quick splicing process comprises the following steps:
the rapid splicing process comprises a welding process of the enhanced HDPE geomembrane and a lapping process of the widened geotextile;
specifically, the method comprises the following steps:
the welding process of the enhanced HDPE geomembrane is the wide-width high-constant-temperature rapid-speed enhanced hot-melt welding of the geomembrane, wherein the welding temperature is 400-420 ℃, and the welding speed is 3-6 m/min; wherein the optimal welding temperature is 420 ℃, the welding advancing speed is 5m/min, and the reinforced HDPE geomembrane is subjected to rapid hot-melt welding.
The lapping width of the lapping process is the width increased by the widened geotextile, namely 30cm width lapping is carried out on the geotextile.
3. The welding seam detection process comprises the following steps:
the welding seam detection process comprises a one-time pressurizing and pressure releasing detection method for a full-length welding seam and a handheld single-section quick stripping detection method.
Specifically, the method comprises the following steps:
the method for detecting the one-time pressurization and pressure relief of the full-length weld joint is large-area rapid detection of double weld joints after welding by a hot melting method, namely, a rapid pressurization and pressure relief device and a matched pressure facility are adopted to carry out integrity detection on the one-time pressurization and rapid pressure relief of the full-length weld joint, the inflation pressure is more than or equal to 300KPa, and the duration is more than or equal to 1 min. As shown in fig. 2, the specific one-time pressurization and pressure relief detection method for the full-length weld joint comprises the following steps: the two ends (24 and 27) of the through long welding seam cavity are sealed, the air pressure detection device 22 connected with the air supply device 21 inserts the needle 23 into the position 25 about 10cm away from the inner side of the cavity 24, the air pressure detection device 22 is used for pressurizing the welding seam air cavity 26 to 300kPa for more than 1 minute, the air pressure is ensured to be not lower than 300kPa, then the hole is opened at the other end 27 of the welding seam for deflation, the pointer of the barometer 28 can be quickly reset to zero, the qualification is judged, and finally the repair welding sealing is carried out on the notches 25 and 27.
As shown in fig. 3, the handheld single-section rapid peeling test method of the present invention is to use a handheld single-section rapid peeling tester 31 to perform rapid peeling test along the edge of the weld 32, and the weld 32 is not allowed to have a "fish mouth" 33.
4. Generic patch means:
the universal patch component is formed by extrusion welding of double-layer HDPE films, and is suitable for reinforcing welding of HDPE films at weak positions such as T-shaped seams and breakage caused by artificial defects; wherein the second layer of HDPE film is required to extend at least 20cm beyond the edge of the first layer of HDPE film to ensure the quality of the reinforcement system.
Specifically, the method comprises the following steps:
as shown in FIG. 4, the double-patch HDPE film welding of the invention realizes high-efficiency extrusion welding through prefabricated modules, namely, the works of cutting, wiping, roughening and the like of a reinforced HDPE film are completed before welding the HDPE reinforced film, the parts 42 without double-seam welding 41 in the range of weak parts such as T-seams, damages caused by artificial defects and the like are roughened and welded, the prefabricated first-layer HDPE film module (50cm × 50cm)43 covers the T-seams, the first-layer reinforcement welding 44 is carried out, the prefabricated second-layer HDPE film module (70cm × 70cm)45 covers the first-layer HDPE film, the second-layer reinforcement welding 46 is carried out, and the double-patch welding is quickly realized.
Based on the related design of the composite HDPE film prevention and control system and the selection of the process parameters, the invention provides a construction method of the composite HDPE film prevention and control system, which comprises the following steps:
paving the bottom layer of the widened geotechnical cloth, and overlapping two adjacent widened geotechnical cloth;
laying the enhanced HDPE geomembranes in the middle layer, and welding two adjacent enhanced HDPE geomembranes;
detecting the welding line of the HDPE geomembrane by adopting a full-length welding line one-time pressurizing and pressure-releasing detection method and/or a handheld single-section quick stripping detection method;
reinforcing and welding the damaged part or the part which cannot be subjected to double-seam welding of the enhanced HDPE geomembrane by adopting a double-layer HDPE film;
and laying the upper layer of the widened geotechnical cloth, and overlapping two adjacent widened geotechnical cloth.
The invention has the advantages that:
1. and the high-efficiency pollution prevention and control of the emergency facility base are realized. The pollution of medical waste, medical waste water, infectious waste and the like generated in an emergency facility base to soil and underground water is completely prevented, the influence of the underground water on the emergency facility is prevented, the moisture-proof effect is achieved, the highest anti-permeability protection standard is guaranteed aiming at the strong corrosivity, toxicity, radioactivity and infectivity of pollutants, and the emergency safety protection effect is achieved.
2. The welding parameters are optimized, the welding speed is improved, the stability of welding quality is improved, the high-efficiency welding effect can be enhanced, the width design of the filament non-woven geotextile is upgraded and optimized, the rapid lap joint and the quality guarantee of the geotextile are facilitated, and the construction period is shortened.
3. The design and parameter optimization of the one-time pressurizing and rapid pressure relief detection method for the full-length welding line and the handheld single-section rapid stripping detection method can realize rapid detection of a corresponding emergency project prevention and control system, and the method is convenient to operate and good in detection effect.
4. Through designing the universal patch component and prefabricating the double-patch module, the plasticity is strong, and the quick repair is easy to realize.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A composite HDPE film containment system for emergency facility bases, comprising:
selecting a modular composite HDPE film prevention and control material:
the composite HDPE film prevention and control material is a two-cloth one-film which is compounded on site, and the two-cloth one-film is composed of an enhanced HDPE geomembrane and a widened geotextile;
the quick splicing process comprises the following steps:
the rapid splicing process comprises a welding process of the enhanced HDPE geomembrane and a lapping process of the widened geotextile, wherein the welding temperature of the welding process is 400-420 ℃, and the welding speed is 3-6 m/min;
the welding seam detection process comprises the following steps:
the welding line detection process comprises a full-length welding line one-time pressurizing and pressure-releasing detection method, wherein the inflation pressure of the full-length welding line one-time pressurizing and pressure-releasing detection method is more than or equal to 300KPa, and the duration time is more than or equal to 1 min;
generic patch means:
the universal patch member is formed by extrusion welding of double-layer HDPE films.
2. The composite HDPE film prevention and control system of claim 1, wherein the width of the reinforced HDPE geomembrane is not less than 700cm, the elongation at break is not less than 800%, and the right-angle tear resistance is not less than 250N;
the width of the widened geotextile is 420 cm-450 cm, the lapping width of the lapping process is 20 cm-50 cm, and the gram weight of the lapping process is 500-800 g/m2The elongation at break is more than or equal to 100 percent, the bursting strength is more than or equal to 7000N, and the trapezoidal tearing strength is more than or equal to 1000N;
the anti-permeability coefficient of the composite HDPE film prevention and control material reaches 1.0 × 10-12cm/s。
3. The composite HDPE film containment system of claim 2 wherein the reinforced HDPE geomembrane has a width of 800cm, the widened geotextile has a width of 430cm, and the overlap process has an overlap width of 30 cm.
4. The composite HDPE film prevention and control system as claimed in claim 1, wherein the welding temperature of the welding process is 420 ℃ and the welding speed is 5m/min, and the reinforced HDPE geomembrane is subjected to rapid thermal fusion welding.
5. The composite HDPE film as claimed in claim 1, wherein the one-time pressurization and depressurization detection method for the full length weld is to perform integrity detection on the one-time pressurization and depressurization for the full length weld by using a rapid pressurization and depressurization device and a matched pressure facility.
6. The composite HDPE film containment system of claim 5 wherein the one-time pressure relief through weld detection method comprises:
sealing two ends of the through long welding seam cavity, and connecting air pressure detection equipment of an air supply device; inserting the needle head into a preset position on the inner side of the cavity on one side, pressurizing the welding seam air cavity to 300kPa by using a pressure detection device, maintaining for more than 1min, ensuring that the air pressure is not lower than 300kPa, then opening a hole on the other side of the welding seam for air release, judging that the air pressure meter is qualified if the pointer rapidly returns to zero, and finally performing repair welding and sealing on the cut.
7. The composite HDPE film containment system of claim 1 wherein the weld detection process further comprises a hand-held single-section rapid peel detection method;
the handheld single-section rapid peeling detection method is used for peeling detection along the edge of a welding seam, and the peeling detection is that the welding seam is not allowed to have a fish mouth.
8. The composite HDPE film containment system of claim 1 wherein the extrusion welding of the two-layer HDPE film comprises:
prefabricating a double-layer HDPE film which is subjected to film cutting, wiping and roughening;
roughening and welding the damaged part or the part which cannot be subjected to double-seam welding of the enhanced HDPE geomembrane;
covering the position with a prefabricated first HDPE film, and carrying out first layer reinforcement welding;
covering the prefabricated second HDPE film on the first HDPE film, and performing second layer reinforcement welding to realize double-layer HDPE film extrusion welding.
9. The composite HDPE film containment system of claim 8 wherein the second HDPE film extends at least 20cm beyond the edge of the first HDPE film.
10. A method of constructing a composite HDPE film containment system as claimed in any of claims 1 to 9, comprising:
paving the bottom layer of the widened geotextile, and overlapping two adjacent widened geotextiles;
laying the enhanced HDPE geomembranes in the middle layer, and welding two adjacent enhanced HDPE geomembranes;
detecting the welding line of the HDPE geomembrane by adopting a full-length welding line one-time pressurizing and pressure-releasing detection method and/or a handheld single-section quick stripping detection method;
reinforcing and welding the damaged part or the part which cannot be subjected to double-seam welding of the enhanced HDPE geomembrane by adopting a double-layer HDPE film;
and laying the upper layer of the widened geotechnical cloth, and overlapping the two adjacent widened geotechnical cloth.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010140710.XA CN111331849A (en) | 2020-03-03 | 2020-03-03 | Composite HDPE (high-density polyethylene) film prevention and control system for emergency facility base and construction method |
| PCT/CN2020/118026 WO2021174818A1 (en) | 2020-03-03 | 2020-09-27 | Composite hdpe membrane-based prevention and control system for emergency facility base, and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010140710.XA CN111331849A (en) | 2020-03-03 | 2020-03-03 | Composite HDPE (high-density polyethylene) film prevention and control system for emergency facility base and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111331849A true CN111331849A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010140710.XA Pending CN111331849A (en) | 2020-03-03 | 2020-03-03 | Composite HDPE (high-density polyethylene) film prevention and control system for emergency facility base and construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111926909A (en) * | 2020-07-03 | 2020-11-13 | 中建新疆建工集团第五建筑工程有限公司 | Construction method of sludge storage tank for dredging |
| CN113246478A (en) * | 2021-04-25 | 2021-08-13 | 白蕊 | Wave-joint type PE (polyethylene) plate hot-melting method |
| WO2021174818A1 (en) * | 2020-03-03 | 2021-09-10 | 北京高能时代环境技术股份有限公司 | Composite hdpe membrane-based prevention and control system for emergency facility base, and construction method |
| CN113721610A (en) * | 2021-08-17 | 2021-11-30 | 河北工程大学 | HDPE film surface defect detection intelligent carrying system and detection method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117272479B (en) * | 2023-10-08 | 2024-02-23 | 山东鑫之源新材料科技有限公司 | High-strength geomembrane bursting strength prediction method based on load time course analysis |
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| WO2021174818A1 (en) | 2021-09-10 |
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