CN116905434A - Double-layer geomembrane seepage-proofing structure and inflation inspection method thereof - Google Patents
Double-layer geomembrane seepage-proofing structure and inflation inspection method thereof Download PDFInfo
- Publication number
- CN116905434A CN116905434A CN202310888365.1A CN202310888365A CN116905434A CN 116905434 A CN116905434 A CN 116905434A CN 202310888365 A CN202310888365 A CN 202310888365A CN 116905434 A CN116905434 A CN 116905434A
- Authority
- CN
- China
- Prior art keywords
- geomembrane
- layer
- inflation
- closed
- geomembranes
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000007689 inspection Methods 0.000 title abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010410 layer Substances 0.000 claims description 97
- 238000005192 partition Methods 0.000 claims description 46
- 239000012528 membrane Substances 0.000 claims description 37
- 239000012943 hotmelt Substances 0.000 claims description 13
- 239000011241 protective layer Substances 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 230000005587 bubbling Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 239000000344 soap Substances 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 4
- 230000010354 integration Effects 0.000 claims 3
- 239000002355 dual-layer Substances 0.000 claims 2
- 238000007789 sealing Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 7
- 230000008018 melting Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 238000005429 filling process Methods 0.000 description 4
- 239000002356 single layer Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- 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
-
- 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
- E02D31/02—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 against ground humidity or ground water
- E02D31/025—Draining membranes, sheets or fabric specially adapted therefor, e.g. with dimples
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- 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
-
- 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)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Physics & Mathematics (AREA)
- Hydrology & Water Resources (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to the technical field of water conservancy and hydropower engineering, and discloses a double-layer geomembrane seepage-proofing structure and an inflation inspection method thereof.
Description
Technical Field
The invention belongs to the technical field of water conservancy and hydropower engineering, and relates to a double-layer geomembrane seepage-proofing structure and an inflation inspection method thereof.
Background
The geomembrane material has great advantages in transportation, construction, cost, environmental protection and other aspects, and has been widely applied to engineering seepage prevention of channels, embankments, dams, landfill sites, reservoirs and the like. In the technical specifications of SL/T225-1998 water conservancy and hydropower engineering geosynthetic material application and GB50290-2014 geosynthetic material application, the selection of the thickness, the material and the type of the geomembrane in the seepage-proofing design is specified, and in particular, in the technical specification of water conservancy and hydropower engineering geomembrane seepage-proofing, the connection mode of the geomembrane with different foundations and concrete buildings is subjected to standardization requirements.
At present, the domestic geomembrane is designed and implemented by adopting a single-layer geomembrane basically, and practice shows that the defect of the geomembrane is inevitably caused in the construction and connection process, particularly in the filling process of an upper protective layer.
Secondly, in terms of concrete defect inspection, the current methods for geomembrane leak detection generally mainly comprise two methods: the method comprises the following steps of using a double-electrode method under the condition that a geotechnical film is covered with a sandstone soil layer; the arc method is used for exposing the geomembrane and covering the geofabric or the geocomposite drainage network on the geomembrane. The two methods have certain errors in terms of reliability, and particularly special equipment is needed, so that the control technology is high in requirements, the implementation is inconvenient, and the inspection and test cost is high.
Disclosure of Invention
The invention aims to provide a double-layer geomembrane seepage-proofing structure and an inflation inspection method thereof, wherein the seepage-proofing structure of an upper geomembrane and a lower geomembrane is adopted, the whole guarantee rate is improved compared with that of a single-layer geomembrane, continuous sealing subareas with the side length not more than 2m are formed through hot melting or bonding, pipe membrane integrated components are arranged at four corners of each sealing subarea, the integrity and the sealing inspection of each sealing subarea can be realized through inflating along an inflation grouting pipe, the inspection can be carried out before and after filling a protective layer, the sealing inspection can be carried out more reliably, the defective sealing subareas can be repaired through grouting along the inflation grouting pipe, the seepage-proofing sealing effect is ensured, the reliability is high, the construction is simple and convenient, and the inspection test cost is low.
The technical scheme adopted by the invention is that the double-layer geomembrane seepage-proofing structure comprises two layers of geomembranes and pipe membrane integrated components arranged on an upper layer of geomembrane, wherein the upper layer of geomembrane and the lower layer of geomembrane are connected into a plurality of continuous closed partitions, the pipe membrane integrated components are arranged at four corners of each closed partition, and the pipe membrane integrated components can be used for inflating the inside of the closed partition.
Further, the upper and lower geomembranes are connected into a plurality of continuous closed partitions by means of single-slit hot-melt welding or bonding.
Further, the pipe film integrated member is connected and sealed with the upper geofilm in a single-slit hot-melt welding or bonding mode.
Further, the side length of each of the closed partitions is not more than 2m, and the distance between the pipe film integrated member and the nearest two film sides is not less than 35cm.
Further, the pipe film integrated member comprises a geomembrane component and an inflatable grouting pipe integrally connected with the geomembrane component.
Furthermore, T-shaped joints are adopted between the upper layer or the lower layer of geomembrane, and the joint distance between the two layers is staggered by not less than 50cm.
The invention also provides an inflation inspection method of the double-layer geomembrane seepage-proofing structure, which is characterized by comprising the following steps of:
step 1, performing an inflation test in a closed partition and checking;
step 2, filling an upper protection layer according to construction requirements after all geomembranes are inspected to be qualified;
step 3, after filling the upper protective layer, re-developing an inflation test according to the subareas and checking, and checking the integrity of the constructed geomembrane for seepage prevention;
and 4, performing an inflation test on all the closed subareas which are qualified and checked, and plugging inflation ports of the closed subareas.
Further, in the step 1, an inflation test is performed and checked in the closed partition, specifically:
carrying out an inflation test in the closed subarea and checking, wherein the inflation pressure is controlled to be between 0.10 and 0.25MPa according to the film thickness, and the pressure is maintained for 1 to 5 minutes without reduction, so that the connection and closure of geomembranes between the closed subareas are indicated, and the checking is qualified; when the pressure drops, soap water is sprayed on the surfaces of the upper and lower layers of geomembranes of the closed partition respectively, whether the surfaces of the geomembranes are bubbling or not or whether the surfaces of the geomembranes are obviously leaked along the surfaces is observed, the geomembranes at the leakage parts are repaired, an inflation test is carried out again and the pressure drops, and the condition that the geomembranes between the closed partition are connected and closed and the detection is qualified is indicated.
Further, in the step 2, the protection of the geomembrane and pipe membrane integrated member is paid attention to in the process of filling the upper protection layer, and meanwhile, the inflation grouting pipe is extended to the upper part of the protection layer, and the geomembrane partition mark is made.
Further, in the step 3, the inflation test is carried out again according to the subareas and checked, the step 1 and the deformation of the upper protection layer are noted in the inflation process, the instability phenomenon exists, the pressure level is reduced, the inflation test is carried out under the pressure, and the pressure stabilizing time is prolonged by more than 2 min; and (3) performing chemical grouting treatment on the unqualified sealed partition, and performing chemical grouting treatment along the gas filling grouting pipes, wherein the chemical grouting pressure is controlled to be 0.10-0.25 MPa, and stopping grouting after all the other 3 gas filling grouting pipes in the sealed partition are out of the slurry, so that the treatment is finished.
The invention has the beneficial effects that:
the anti-seepage structure of the upper and lower layers of geomembranes is adopted, the integral guarantee rate of the anti-seepage structure is improved compared with that of a single-layer geomembrane, continuous sealing subareas with the side length not more than 2m are formed through hot melting or bonding, pipe membrane integrated components are arranged at four corners of each sealing subarea, the integrity and sealing inspection of each sealing subarea can be realized through inflating along an inflation grouting pipe, the inspection is carried out before and after filling of a protective layer respectively, the sealing can be inspected more reliably, the defective sealing subareas are grouted and repaired through grouting along the inflation grouting pipe, the anti-seepage sealing effect is ensured, the reliability is high, the construction is simple and convenient, and the inspection test cost is low.
Drawings
FIG. 1 is a schematic plan view of a tubular membrane integrated member of the present invention;
FIG. 2 is a schematic perspective view of a tubular film integrated member of the present invention;
FIG. 3 is a schematic illustration of a T-connection between upper geomembranes and a connection with a tubular membrane integrated member in accordance with the present invention;
FIG. 4 is a schematic view of section A-A of FIG. 3.
Reference numerals illustrate:
1-a geomembrane component; 2-inflating grouting pipes; a-upper geomembrane (a web); b-upper geomembrane (B web); c-upper geomembrane (C web); d-lower geomembrane (whole width); e-pipe film integrated component and upper layer a-web geomembrane joint; f-connecting the upper layer a-web and the lower layer c-web geomembrane (whole web); the S-pipe film integrated component is connected with the upper geomembrane.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear and apparent, the technical solutions of the present invention will be described in further detail with reference to the following examples and the accompanying drawings of the examples. It is to be understood that the following examples are only for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Example 1
As shown in fig. 1 to 4, the double-layer geomembrane seepage-proofing structure comprises two layers of geomembranes and a pipe membrane integrated component which is connected and sealed with an upper layer of geomembrane in a single-slit hot-melt welding or bonding mode, wherein the pipe membrane integrated component can be inflated into a sealed partition, the geomembrane material and the thickness are calculated and analyzed according to functional requirements and meet related standard requirements, the upper layer of geomembrane and the lower layer of geomembrane are connected into a plurality of continuous sealed partitions in a single-slit hot-melt welding or bonding mode, the side length of each sealed partition is not more than 2m, the four corners of each sealed partition are provided with the pipe membrane integrated component, the distance between the pipe membrane integrated component and the nearest two membrane edges is not less than 35cm, and the pipe membrane integrated component comprises a geomembrane component 1 and an inflation grouting pipe 2 integrally connected with the geomembrane component 1.
T-shaped joints are adopted between the upper layer or the lower layer of geomembranes, and the upper layer or the lower layer of geomembranes are strictly forbidden to be in a cross shape, such as T-shaped joint patterns of an upper layer a-frame geomembrane A, an upper layer B-frame geomembrane B and an upper layer C-frame geomembrane C in fig. 3, and joint distances between the frames are staggered to be not less than 50cm. Specifically, as shown in fig. 4, the pipe film integrated member is connected with the upper layer a-frame geofilm a at the position E by means of single seam hot-melt welding or bonding, and the corresponding lower layer geofilm (whole width) D is connected with the upper layer a-frame geofilm and the upper layer c-frame geofilm at the position F.
The inflation inspection method of the double-layer geomembrane seepage-proofing structure of the invention, referring to fig. 1 to 4 in combination, comprises the following steps:
and 1, carrying out an inflation test along the inflation grouting pipe 2 into the sealed subarea and checking, wherein the inflation pressure is controlled to be 0.10-0.25 MPa according to the film thickness, and the pressure is maintained for 1-5 min without reduction, so that the connection and sealing of the geomembrane between the sealed subareas are indicated, and the checking is qualified.
And 2, filling an upper protective layer according to construction requirements after all the geomembranes are inspected to be qualified, protecting the geomembrane and pipe membrane integrated components in the filling process, simultaneously extending the inflatable grouting pipe 2 to the upper part of the protective layer, and making geomembrane partition marks.
And 3, after filling the upper protection layer, carrying out an inflation test again according to the subareas along the inflation grouting pipe 2 and checking, checking the integrity of the constructed geomembrane seepage prevention, wherein the step 1 and the inflation test process pay attention to the deformation of the upper protection layer, have an unstable phenomenon, reduce the pressure level, maintain the inflation test under the pressure, prolong the pressure stabilizing time for more than 2 minutes, ensure that the pressure is not reduced, and show that the geomembrane between the closed subareas is connected and sealed and checked to be qualified.
And 4, plugging all the sealed subareas which are subjected to the inflation test and are inspected to be qualified by adopting a hot melting or chemical grouting method, wherein the plugging length is not less than 10cm.
Example 2
As shown in fig. 1 to 4, the double-layer geomembrane seepage-proofing structure comprises two layers of geomembranes and a pipe membrane integrated component which is connected and sealed with an upper layer of geomembrane in a single-slit hot-melt welding or bonding mode, wherein the pipe membrane integrated component can be inflated into a sealed partition, the geomembrane material and the thickness are calculated and analyzed according to functional requirements and meet related standard requirements, the upper layer of geomembrane and the lower layer of geomembrane are connected into a plurality of continuous sealed partitions in a single-slit hot-melt welding or bonding mode, the side length of each sealed partition is not more than 2m, the four corners of each sealed partition are provided with the pipe membrane integrated component, the distance between the pipe membrane integrated component and the nearest two membrane edges is not less than 35cm, and the pipe membrane integrated component comprises a geomembrane component 1 and an inflation grouting pipe 2 integrally connected with the geomembrane component 1.
T-shaped joints are adopted between the upper layer or the lower layer of geomembranes, and the upper layer or the lower layer of geomembranes are strictly forbidden to be in a cross shape, such as T-shaped joint patterns of an upper layer a-frame geomembrane A, an upper layer B-frame geomembrane B and an upper layer C-frame geomembrane C in fig. 3, and joint distances between the frames are staggered to be not less than 50cm. Specifically, as shown in fig. 4, the pipe film integrated member is connected with the upper layer a-frame geofilm a at the position E by means of single seam hot-melt welding or bonding, and the corresponding lower layer geofilm (whole width) D is connected with the upper layer a-frame geofilm and the upper layer c-frame geofilm at the position F.
The inflation inspection method of the double-layer geomembrane seepage-proofing structure of the invention, referring to fig. 1 to 4 in combination, comprises the following steps:
step 1, carrying out an inflation test along the inflation grouting pipe 2 into a closed partition, and checking, wherein the inflation pressure is controlled to be 0.10-0.25 MPa according to the film thickness, the pressure is kept for 1-5 min, the pressure continuously drops, the connection of the geomembranes between the closed partitions is not closed, the checking is unqualified, soapy water is sprayed on the surfaces of the geomembranes on the upper layer and the lower layer of the closed partition respectively, whether the bubbling phenomenon exists on the surfaces of the geomembranes or the surfaces of the geomembranes are obviously leaked, repairing the geomembranes at the leaking parts, carrying out the inflation test again, checking, and the pressure is not reduced, so that the connection of the geomembranes between the closed partitions is closed, and the checking is qualified.
And 2, filling an upper protective layer according to construction requirements after all the geomembranes are inspected to be qualified, protecting the geomembrane and pipe membrane integrated components in the filling process, simultaneously extending the inflatable grouting pipe 2 to the upper part of the protective layer, and making geomembrane partition marks.
And 3, after filling the upper protection layer, carrying out an inflation test again according to the subareas along the inflation grouting pipe 2 and checking, checking the integrity of the constructed geomembrane seepage prevention, wherein the step 1 and the inflation test process pay attention to the deformation of the upper protection layer, have an unstable phenomenon, reduce the pressure level, maintain the inflation test under the pressure, prolong the pressure stabilizing time for more than 2 minutes, ensure that the pressure is not reduced, and show that the geomembrane between the closed subareas is connected and sealed and checked to be qualified.
And 4, plugging all the sealed subareas which are subjected to the inflation test and are inspected to be qualified by adopting a hot melting or chemical grouting method, wherein the plugging length is not less than 10cm.
Example 3
As shown in fig. 1 to 4, the double-layer geomembrane seepage-proofing structure comprises two layers of geomembranes and a pipe membrane integrated component which is connected and sealed with an upper layer of geomembrane in a single-slit hot-melt welding or bonding mode, wherein the pipe membrane integrated component can be inflated into a sealed partition, the geomembrane material and the thickness are calculated and analyzed according to functional requirements and meet related standard requirements, the upper layer of geomembrane and the lower layer of geomembrane are connected into a plurality of continuous sealed partitions in a single-slit hot-melt welding or bonding mode, the side length of each sealed partition is not more than 2m, the four corners of each sealed partition are provided with the pipe membrane integrated component, the distance between the pipe membrane integrated component and the nearest two membrane edges is not less than 35cm, and the pipe membrane integrated component comprises a geomembrane component 1 and an inflation grouting pipe 2 integrally connected with the geomembrane component 1.
T-shaped joints are adopted between the upper layer or the lower layer of geomembranes, and the upper layer or the lower layer of geomembranes are strictly forbidden to be in a cross shape, such as T-shaped joint patterns of an upper layer a-frame geomembrane A, an upper layer B-frame geomembrane B and an upper layer C-frame geomembrane C in fig. 3, and joint distances between the frames are staggered to be not less than 50cm. Specifically, as shown in fig. 4, the pipe film integrated member is connected with the upper layer a-frame geofilm a at the position E by means of single seam hot-melt welding or bonding, and the corresponding lower layer geofilm (whole width) D is connected with the upper layer a-frame geofilm and the upper layer c-frame geofilm at the position F.
The inflation inspection method of the double-layer geomembrane seepage-proofing structure of the invention, referring to fig. 1 to 4 in combination, comprises the following steps:
step 1, carrying out an inflation test along the inflation grouting pipe 2 into a closed partition, and checking, wherein the inflation pressure is controlled to be 0.10-0.25 MPa according to the film thickness, the pressure is kept for 1-5 min, the pressure continuously drops, the connection of the geomembranes between the closed partitions is not closed, the checking is unqualified, soapy water is sprayed on the surfaces of the geomembranes on the upper layer and the lower layer of the closed partition respectively, whether the bubbling phenomenon exists on the surfaces of the geomembranes or the surfaces of the geomembranes are obviously leaked, repairing the geomembranes at the leaking parts, carrying out the inflation test again, checking, and the pressure is not reduced, so that the connection of the geomembranes between the closed partitions is closed, and the checking is qualified.
And 2, filling an upper protective layer according to construction requirements after all the geomembranes are inspected to be qualified, protecting the geomembrane and pipe membrane integrated components in the filling process, simultaneously extending the inflatable grouting pipe 2 to the upper part of the protective layer, and making geomembrane partition marks.
And 3, after filling the upper protection layer, carrying out inflation inspection again along the inflation grouting pipe 2 according to the partition, checking the anti-seepage integrity of the geomembrane after construction, taking care of the deformation of the upper protection layer in the same step 1 and the inflation test process, reducing the pressure level, carrying out the inflation test under the pressure, prolonging the pressure stabilizing time for more than 2min, continuously reducing the pressure to indicate that the geomembrane connection between the closed partitions is not closed, checking the closed partition which is unqualified, carrying out chemical grouting treatment along the inflation grouting pipe 2, controlling the chemical grouting pressure to be 0.10 MPa-0.25 MPa, and stopping grouting after all the rest 3 inflation grouting pipes 2 in the closed partition are completely grouted, and ending the treatment.
And 4, plugging all the sealed subareas which are subjected to the inflation test and are inspected to be qualified by adopting a hot melting or chemical grouting method, wherein the plugging length is not less than 10cm.
Claims (10)
1. The utility model provides a double-deck geomembrane seepage prevention structure, its characterized in that includes two-layer geomembrane and the pipe membrane integration component that sets up on upper geomembrane, upper and lower layer geomembrane connect into a plurality of continuous sealed subregions, sealed subregion's four corners is provided with pipe membrane integration component, pipe membrane integration component can aerify in the sealed subregion.
2. The dual-layer geomembrane barrier structure of claim 1, wherein the upper and lower geomembranes are joined into a plurality of continuous closed zones by single slit hot melt welding or bonding.
3. The double-layer geomembrane impermeable structure of claim 1, wherein said tubular membrane integrated member is sealed by single slit hot melt welding or bonding to said upper layer geomembrane.
4. The bi-layer geomembrane barrier structure of claim 1, wherein each of said closed sections has a side length of no more than 2m and said tubular membrane integrated member is no less than 35cm from the nearest two membrane sides.
5. The dual-layer geomembrane barrier structure of claim 1, wherein the pipe-membrane integrated member comprises a geomembrane component and an inflation grouting pipe integrally connected to the geomembrane component.
6. The double-layer geomembrane impermeable structure according to claim 1, wherein T-shaped seams are adopted between the upper layer or the lower layer of geomembrane, and the inter-web seam distance is not less than 50cm.
7. The method for inspecting the inflation of a double-layer geomembrane barrier structure according to any one of claims 1-6, comprising the steps of:
step 1, performing an inflation test in a closed partition and checking;
step 2, filling an upper protection layer according to construction requirements after all geomembranes are inspected to be qualified;
step 3, after filling the upper protective layer, re-developing an inflation test according to the subareas and checking, and checking the integrity of the constructed geomembrane for seepage prevention;
and 4, performing an inflation test on all the closed subareas which are qualified and checked, and plugging inflation ports of the closed subareas.
8. The method for inspecting the inflation of the double-layer geomembrane impermeable structure according to claim 7, wherein in the step 1, an inflation test is performed and inspected in the closed partition, specifically:
carrying out an inflation test in the closed subarea and checking, wherein the inflation pressure is controlled to be between 0.10 and 0.25MPa according to the film thickness, and the pressure is maintained for 1 to 5 minutes without reduction, so that the connection and closure of geomembranes between the closed subareas are indicated, and the checking is qualified; when the pressure drops, soap water is sprayed on the surfaces of the upper and lower layers of geomembranes of the closed partition respectively, whether the surfaces of the geomembranes are bubbling or not or whether the surfaces of the geomembranes are obviously leaked along the surfaces is observed, the geomembranes at the leakage parts are repaired, an inflation test is carried out again and the pressure drops, and the condition that the geomembranes between the closed partition are connected and closed and the detection is qualified is indicated.
9. The method according to claim 7, wherein in the step 2, the upper protective layer is filled and the geomembrane and pipe membrane integrated member is protected, and the inflation grouting pipe is extended to the upper part of the protective layer, and the geomembrane partition mark is made.
10. The method for inspecting the anti-seepage structure of the double-layer geomembrane according to claim 8, wherein in the step 3, the inflation test is carried out again according to the subareas and inspected, the same step 1 and the deformation of the upper protection layer is noted in the inflation process, the instability phenomenon exists, the pressure level is reduced, the inflation test is carried out under the pressure, and the pressure stabilizing time is prolonged by more than 2 min; and (3) performing chemical grouting treatment on the unqualified sealed partition, and performing chemical grouting treatment along the gas filling grouting pipes, wherein the chemical grouting pressure is controlled to be 0.10-0.25 MPa, and stopping grouting after all the other 3 gas filling grouting pipes in the sealed partition are out of the slurry, so that the treatment is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310888365.1A CN116905434A (en) | 2023-07-19 | 2023-07-19 | Double-layer geomembrane seepage-proofing structure and inflation inspection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310888365.1A CN116905434A (en) | 2023-07-19 | 2023-07-19 | Double-layer geomembrane seepage-proofing structure and inflation inspection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116905434A true CN116905434A (en) | 2023-10-20 |
Family
ID=88354524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310888365.1A Pending CN116905434A (en) | 2023-07-19 | 2023-07-19 | Double-layer geomembrane seepage-proofing structure and inflation inspection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116905434A (en) |
-
2023
- 2023-07-19 CN CN202310888365.1A patent/CN116905434A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103526724A (en) | Anchoring impervious structure in which reservoir bottom geomembrane is connected with reservoir periphery drainage gallery peripheral joints | |
| CN102535518B (en) | Plugging method of large seam of underground diaphragm wall | |
| CN209741768U (en) | Aqueduct indirect seam water stopping device for hydraulic engineering | |
| CN201424658Y (en) | Water leakage detection of underground continuous wall groove seams and block repair device | |
| CN116905434A (en) | Double-layer geomembrane seepage-proofing structure and inflation inspection method thereof | |
| CN113789816A (en) | Basement high-water-level precast pile head waterproof structure and construction method thereof | |
| CN105672367A (en) | High-molecular self-adhesive film waterproof roll welding and lapping structure and construction method | |
| CN105780940A (en) | Building expansion joint anti-seeping structure | |
| CN211172024U (en) | A block structure for foundation ditch precipitation well | |
| CN210315588U (en) | Foundation ditch supports stagnant water sleeve and foundation ditch stagnant water structure of steel lattice column | |
| JP2960821B2 (en) | Water impermeable sheet and method for detecting damaged part thereof | |
| CN111441311A (en) | Underwater repair method for leakage of old dam structure seam | |
| JPH1110107A (en) | On-site inspection method for water barrier sheet spread over waterproof storage recessed part and device for on-site inspection | |
| CN109026022B (en) | Reinforcing structure and reinforcing method for pebble-drift stratum shield river crossing | |
| CN110847155A (en) | Waterproof seam pretreatment method in underground continuous wall construction process | |
| JP2008107338A (en) | Inspection method of sealing sheet joint | |
| JP2008297749A (en) | Cofferdam construction method, cut-off structure, and cofferdam structure | |
| CN106759522A (en) | A kind of the ground-connecting-wall G type joints and method of pre-buried repeatable Grouting Pipe | |
| CN206941656U (en) | A kind of structure that injected hole is reserved using gas cell | |
| CN212153352U (en) | Continuous wall | |
| JP3771196B2 (en) | Water-impervious sheet at waste disposal site and self-repairable sheet | |
| CN112901221B (en) | Waterproof structure of ultra-large section rectangular pipe-jacking tunnel portal of underpass river | |
| CN216892256U (en) | A waterproof construction for handling earth and rockfill dam body seepage under water | |
| CN211735534U (en) | Basement construction joint position prevention of seepage maintenance structure | |
| CN105275019A (en) | Underground pipeline anti-leakage facility |
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 |