Geosynthetic barrier construction device and method

Abstract

The application provides a geosynthetic material anti-seepage engineering traceable construction device and method, and belongs to the technical field of anti-seepage engineering construction. The method comprises the following steps: S1: film conveying; S2: film spreading; S3: film cutting; S4: geotextile membrane trial paving; S5: welding part inspection, geotextile membrane trial welding; S6: after the welding part inspection, welding the geotextile membrane; S7: sampling inspection; S8: temporary anchoring or anchoring; S9: inspection and acceptance. The device comprises a rack, a film unwinding mechanism arranged on the rack and used for unwinding a geotextile membrane roll, two sets of marking mechanisms arranged on the rack and used for marking the geotextile membrane during unwinding, and an intermittent mechanism formed by a second cam and a third cam and used for driving a sealing plate to reciprocate. In the application, the bottom of the marking head is provided with pigment, so that the marking color can be marked on the geotextile membrane; different construction personnel are configured with different pigments, so that the constructors of the geotextile membrane can be distinguished, and traceability can be realized.

Description

Technical Field

[0001] This invention belongs to the field of seepage prevention engineering construction technology, specifically relating to a traceable construction device and method for geosynthetic seepage prevention engineering. Background Technology

[0002] Geosynthetic materials, such as geomembranes, are frequently used in many seepage control projects. Geomembranes are waterproof and barrier materials made from high-molecular polymers. They are mainly classified into low-density polyethylene (LDPE) geomembranes, high-density polyethylene (HDPE) geomembranes, and EVA geomembranes. Geomembranes possess excellent resistance to environmental stress cracking and chemical corrosion, have a wide operating temperature range, and a long service life. They are commonly used in landfills, tailings storage areas, canal seepage control, dam seepage control, and subway projects, among others.

[0003] Geomembrane installation requires laying devices, such as the geomembrane unwinding and winding device disclosed in patent CN 214934638U. This device includes a feeding roller with first support seats at both ends. The upper end of the first support seat is rotatably connected to the rotating shaft of the feeding roller, and the lower end of the first support seat has a roller. While this device can meet the requirements for geomembrane laying, such laying trolleys cannot record the workers involved, making it impossible to trace the construction personnel. Because problems caused by the operators cannot be directly traced back to their source, the cause of accidents remains unclear, leading to disputes and finger-pointing. Summary of the Invention

[0004] To address the problems existing in the prior art, a traceable construction device and method for geosynthetic seepage prevention projects are provided.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] This technical solution proposes a traceable construction device for geosynthetic seepage prevention projects, including a frame with rollers at its bottom; a roll-up mechanism on the frame for unwinding geomembrane rolls; two marking mechanisms on the frame for marking the geomembrane during unwinding; each marking mechanism includes a lock fixedly connected to the top of the frame, with the lock core coaxially connected to a second rotating shaft, which rotates when a key is inserted and turned; the second rotating shaft is driven by a rotatable first cam; a marking head is fitted below the first cam and positioned above the geomembrane roll; a support is connected to the frame, and the marking head is slidably connected to the support; a first spring is fitted onto the marking head, with one end connected to the outer wall of the marking head and the other end connected to the support.

[0007] Preferably, a driving bevel gear is sleeved and connected to the second rotating shaft; the driving bevel gear meshes with a driven bevel gear; the driven bevel gear is sleeved and connected to the first rotating shaft, which is rotatably connected to the frame; the other end of the first rotating shaft is connected to the first cam.

[0008] Preferably, the frame is further provided with a hopper, the bottom of which has a material outlet; a sealing plate is fitted at the bottom of the hopper to open or close the material outlet; a guide rail is welded to the outer wall of the hopper, and the sealing plate is slidably connected to the guide rail; an opening corresponding to the position of the material outlet is opened on the sealing plate; a limit plate is welded to one side of the sealing plate, and a second spring is connected to the limit plate, the other end of which is connected to the frame; a fork head adapted to the number of locks is connected to one end of the sealing plate, and a friction wheel is rotatably connected to the end of the fork head; a spline shaft is also rotatably connected to the frame, and a second cam and a third cam are sleeved and connected on the spline shaft, the second cam and the third cam being respectively configured to correspond to the fork head; a shift fork is connected to the bottom of each second rotating shaft, and a U-shaped groove is opened at one end of the shift fork, the U-shaped groove being configured one-to-one with the second cam and the third cam; when the second rotating shaft rotates, the shift fork swings, driving the corresponding second cam or third cam to move axially along the spline shaft to a position corresponding to the fork head.

[0009] Preferably, a driven pulley is fixedly connected to the splined shaft, a driving pulley is coaxially connected to the roller, and a belt is hung between the driving pulley and the driven pulley.

[0010] Preferably, the unwinding mechanism includes an unwinding roller, which is rotatably connected to the frame; the geomembrane roll is inserted on the unwinding roller.

[0011] Preferably, the third cam is a quincunx cam.

[0012] This invention also proposes a traceable construction method for geosynthetic seepage prevention projects, comprising the following steps:

[0013] S1: Membrane transport;

[0014] S2: Film spreading;

[0015] S3: Cutting the film;

[0016] S4: Trial laying of geomembrane;

[0017] In this step, the geomembrane is laid using the aforementioned geosynthetic seepage prevention engineering traceable construction device.

[0018] S5: Inspection of welded parts, trial welding of geomembrane;

[0019] S6: After the weldment inspection is passed, weld the geomembrane;

[0020] S7: Sampling inspection;

[0021] S8: Temporary anchorage or anchorage;

[0022] S9: Inspection and acceptance.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. This invention features two sets of locks with two different keys. When two construction workers use the same device, inserting the key rotates the corresponding lock cylinder, which in turn rotates the second shaft. The second shaft, through bevel gear transmission, rotates the first cam once. During rotation, the first cam presses the marking head once. The bottom of the marking head contains pigment that marks the geomembrane with a specific color. Different construction workers use different pigments, thus distinguishing the geomembrane installers and enabling traceability.

[0025] 2. This invention also includes second and third cams of different shapes. The rotation of the second and third cams is driven by rollers at the bottom of the device. The second and third cams are connected by a spline shaft structure, which allows them to move axially along the spline shaft. When unlocking, the rotation of the second shaft drives the fork to swing, which in turn moves the second or third cam to the corresponding fork head. When rotating, it drives the sealing plate to move back and forth, thereby allowing the material in the hopper to spill. Since the second and third cams have different shapes, the spilled material has different shapes, which can also help distinguish the workers and make it possible to trace the workers. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 yes Figure 1 A schematic diagram of the A-direction structure of the marking mechanism.

[0029] Figure 3 yes Figure 1 Enlarged schematic diagram of the structural relationship between the central sealing plate and the hopper.

[0030] Figure 4 This is a top view of the shift fork structure.

[0031] Figure 5 This is an enlarged schematic diagram of the second cam structure.

[0032] Figure 6 This is an enlarged schematic diagram of the third cam structure.

[0033] Figure 7 Top view of the relationship between the sealing plate, guide roller, and fork head.

[0034] Figure 8 This is a flowchart of the construction method of the present invention.

[0035] Figure 9 This is a process flow diagram for the construction of a double-seam heat sealing welding machine.

[0036] Figure 10 This is a process flow diagram for the construction of the extrusion welding machine.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Roller; 2-Frame; 201-Support; 3-Geomembrane roll; 4-Handle; 5-First spring; 6-First cam; 7-First shaft; 8-Lock; 81-Key; 9-Driven bevel gear; 10-Driven bevel gear; 11-Hopper; 12-Second cam; 13-Third cam; 14-First pulley; 15-Sealing plate; 151-Fork head; 16-Second spring; 161-Limiting plate; 17-Belt; 18-Second pulley; 19-Shift fork; 20-Second shaft; 21-Geomembrane; 22-Marking head; 23-Friction wheel; 24-Opening; 25-Material inlet; 26-Guide rail. Detailed Implementation

[0039] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0040] In the description of this invention, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present simultaneously. When a component is considered to be "set" on another component, it can be directly set on the other component or there may be an intermediate component present simultaneously.

[0041] Furthermore, terms such as “long,” “short,” “inner,” and “outer” indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the purpose of describing the present invention and are not intended to indicate or imply that the device or component referred to must have this specific orientation or operate in a specific orientational configuration. Therefore, they should not be construed as limitations of the present invention.

[0042] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0043] Example 1

[0044] like Figure 1-8 As shown in the figure, this embodiment proposes a traceable construction device for geosynthetic seepage prevention projects, including a frame 2, with a handle 4 connected to one side of the frame 2; rollers 1 are provided at the bottom of the frame 2 for easy movement; a unwinding mechanism is provided on the frame 2 for unwinding the geomembrane roll 3; the unwinding mechanism mainly includes unwinding rollers, guide rollers and other structures, and the unwinding rollers and guide rollers are rotatably connected to the frame 2, with the geomembrane roll 3 inserted on the unwinding rollers; this is a conventional structure and will not be described in detail.

[0045] The frame 2 is also equipped with two sets of marking mechanisms, which are used to mark the geomembrane 21 when it is unrolled to distinguish the construction workers and facilitate traceability; the marking mechanism can also be set with three or more sets, but in this embodiment, two sets are preferred, and the two sets of construction workers take turns using the same device;

[0046] The specific structural form of the marking mechanism is as follows:

[0047] The marking mechanism includes a lock 8, which is fixedly connected to the top of the frame 2. The lock cylinder of the lock 8 is coaxially connected to a second rotating shaft 20. When the lock 8 is inserted into the key 81 and turned, it can drive the second rotating shaft 20 to rotate. The second rotating shaft 20 is driven by a rotatable first cam 6. A marking head 22 is set below the first cam 6 and is positioned above the geomembrane roll 3. The frame 2 is connected to a bracket 201, and the marking head 22 is slidably connected to the bracket 201. The bottom of the marking head 22 has different pigments. A first spring 5 is sleeved on the marking head 22. One end of the first spring 5 is connected to the outer wall of the marking head 22, and the other end is connected to the bracket 201. The first spring 5 serves as a reset function. When in use, different construction workers use different keys 81 and locks 8, and they cannot be opened by each other. When in use, key 81 is inserted and the lock cylinder is turned. The lock cylinder drives the second rotating shaft 20 to rotate, which in turn drives the first cam 6 to rotate one revolution. During the rotation of the first cam 6, the marking head 22 marks the geomembrane 21, and the construction workers can be distinguished by the marking.

[0048] In the above embodiments, the transmission method between the first cam 6 and the second rotating shaft 20 can be as follows:

[0049] A drive bevel gear 10 is sleeved and connected to the second rotating shaft 20; the drive bevel gear 10 meshes with a driven bevel gear 9; the driven bevel gear 9 is sleeved and connected to the first rotating shaft 7, and the first rotating shaft 7 is rotatably connected to the frame 2; the other end of the first rotating shaft 7 is connected to the first cam 6.

[0050] As can be seen from the above description:

[0051] This invention features two sets of locks 8, each equipped with a different key 81. When two construction workers use the same device, inserting the key 81 rotates the corresponding lock cylinder, which in turn rotates the second rotating shaft 20. The second rotating shaft 20, through bevel gear transmission, rotates the first cam 6 one revolution. During rotation, the first cam 6 presses against the marking head 22 once. The bottom of the marking head 22 contains pigment that can mark the geomembrane 21. Different construction workers use different pigments, thus distinguishing the workers working on the geomembrane 21 and enabling traceability.

[0052] Example 2

[0053] Continue to refer to the above appendix Figure 1-8 In this embodiment, we have made further improvements by using different soil mounds to help distinguish the workers, making it easier to check their work; the main improvements are as follows:

[0054] The frame 2 is also equipped with a hopper 11, the bottom of which has a material outlet 25. A sealing plate 15 is fitted at the bottom of the hopper 11 to open or close the material outlet 25. A guide rail 26 is welded to the outer wall of the hopper 11, and the sealing plate 15 is slidably connected to the guide rail 26. An opening 24 corresponding to the position of the material outlet 25 is opened on the sealing plate 15. When the opening 24 moves to the position of the material outlet 25, the opening 24 communicates with the hopper 11, and the material, such as soil, in the hopper 11 will fall out. A limiting plate 161 is also welded to one side of the sealing plate 15. The limiting plate 161 can be locked on one side of the hopper 11 to position the sealing plate 15. A second spring 16 is connected to the limiting plate 161, and the other end of the second spring 16 is connected to the frame 2. One end of the sealing plate 15 is connected to a fork head 151 that matches the number of locks 8. A friction wheel 23 is rotatably connected to the end of the fork head 151.

[0055] The frame 2 is also rotatably connected to a splined shaft, on which a second cam 12 and a third cam 13 are sleeved and connected. The second cam 12 and the third cam 13 have different shapes. The second cam 12 and the third cam 13 are respectively set to correspond to the fork head 151. Each second rotating shaft 20 is connected to a shift fork 19 at its bottom end. One end of the shift fork 19 is provided with a U-shaped slot, which is set to correspond one-to-one with the second cam 12 and the third cam 13. When the second rotating shaft 20 rotates, the shift fork 19 swings, driving the corresponding second cam 12 or third cam 13 to move along the splined shaft axis to the position corresponding to the fork head 151.

[0056] Initially, the second cam 12 and the third cam 13 are both on one side of the corresponding fork head 151, and the second cam 12 and the third cam 13 cannot drive the fork head 151. When the shift fork 19 swings, the shift fork 19 will drive the corresponding cam to move axially along the spline shaft until it reaches the position aligned with the friction wheel 23. At this time, when the second cam 12 or the third cam 13 rotates, it can drive the sealing plate 15 to reciprocate. It should be noted that in the initial state, under the elastic force of the second spring 16, the limiting plate 161 is supported against the side wall of the hopper 11. At this time, there is a gap between the second cam 12 and the third cam 13 and the fork head 151.

[0057] The third cam 13 is a plum blossom cam; the second cam 12 is an irregular cam. Because the two cams have different shapes, the frequency at which they drive the sealing plate 15 to move back and forth is also different. Therefore, the shape formed after the material falls is also different. By utilizing this feature, it is easier to distinguish the construction workers and thus easier to trace them.

[0058] A driven pulley is fixedly connected to the splined shaft, and a driving pulley is coaxially connected to the roller 1. A belt 17 is hung between the driving pulley and the driven pulley.

[0059] How to use:

[0060] In the initial state, the marking head 22 does not contact the geomembrane roll 3. When the key 81 is inserted and turned (from locked to unlocked), the lock cylinder drives the second rotating shaft 20 to rotate, which in turn drives the first cam 6 to rotate one revolution, completing one marking.

[0061] After the second rotating shaft 20 rotates, the second rotating shaft 20 drives the corresponding shift fork 19 to swing. The swing of the shift fork 19 drives the corresponding second cam 12 or third cam 13 to move. Taking the second cam 12 as an example, the second cam 12 moves along the spline shaft axis and comes to the position aligned with the corresponding fork head 151. At this time, when the spline shaft rotates, it can drive the second cam 12 to rotate, thereby driving the fork head 151 and the sealing plate 15 to move back and forth, realizing the intermittent opening / closing of the material port 25.

[0062] In this invention, a second cam 12 and a third cam 13 of different shapes are provided. The rotation of the second cam 12 and the third cam 13 is driven by the roller 1 at the bottom of the device. The second cam 12 and the third cam 13 are connected by a spline shaft structure, which can realize axial movement along the spline shaft. When unlocking, the rotation of the second rotating shaft 20 drives the fork 19 to swing, which can then move the second cam 12 or the third cam 13 to the corresponding fork head 151. When rotating, it can drive the sealing plate 15 to move back and forth, thereby realizing the spillage of materials in the hopper 11. Since the second cam 12 and the third cam 13 have different shapes, the spilled materials have different shapes, which can also make it easy to distinguish the workers and thus make it traceable.

[0063] Example 3

[0064] like Figure 8 As shown, this invention also proposes a traceable construction method for geosynthetic seepage prevention projects, including the following steps:

[0065] S1: Membrane transport;

[0066] S2: Film spreading;

[0067] S3: Cutting the film;

[0068] S4: Trial laying of geomembrane 21;

[0069] In this step, the geomembrane 21 is laid using the above-mentioned geosynthetic seepage prevention engineering traceable construction device.

[0070] S5: Inspection of welded parts, trial welding of geomembrane 21;

[0071] S6: After the weldment inspection is passed, weld the geomembrane 21;

[0072] S7: Sampling inspection;

[0073] S8: Temporary anchorage or anchorage;

[0074] S9: Inspection and acceptance.

[0075] The geomembrane laying sub-project includes the entire process from material cutting to trial welding, welding equipment debugging, anchoring, inspection and acceptance. See the attached document for a detailed flowchart. Figure 8 .

[0076] There are two main methods for welding geomembranes during construction: double-seam heat-sealing welding and single-seam extrusion welding. The operation should comply with relevant specifications.

[0077] like Figure 9 As shown, the double-seam heat sealing welding machine can complete a set of double welds in one go and form a cavity that can be filled with gas for leak detection. This can improve the leak detection method of the weld from the vacuum method to the gas filling method, which greatly improves the work efficiency.

[0078] The technical and process requirements for double-seam heat sealing welding machines are as follows:

[0079] Before laying the membrane, submit a detailed membrane laying diagram and schedule to the engineer;

[0080] Inspection of overlap width after film laying: The overlap length of the welded joint of HDPE film is 100 mm.

[0081] Before welding, the membrane surface within an overlap of about 200 mm should be cleaned by wiping away dust and dirt with a damp cloth to keep this part clean and dry.

[0082] The welded areas must be free of scratches, stains, moisture, dust, and other impurities that may hinder welding or affect construction quality.

[0083] Trial welding: Before formal welding operations, equipment parameters should be set based on experience, and a small piece of film (300×600 mm) should be used for trial welding. Then, a shear and peel test of the weld should be performed on a tensile testing machine. If the values ​​are not lower than the specified values, the parameters should be locked, and formal welding should begin accordingly. Otherwise, the parameters must be readjusted until the test is passed. When there are significant changes in temperature or wind speed, the parameters should be adjusted promptly, and the test repeated to ensure that the performance of the welding machine used in the construction, the site conditions, and the product quality meet the specifications. When performing shear and peel tests on bonded welds, only the film should be torn; there should be no weld breakage (FTB).

[0084] For large-area HDPE geomembranes, double-seam heat-sealing welding machines are mainly used for welding. However, for non-directly overlapping areas, as well as for local repairs and reinforcement, extrusion welding machines must be used.

[0085] like Figure 10 As shown, the technical and process requirements for the extrusion welding machine are as follows:

[0086] Before laying the membrane, submit a detailed membrane laying diagram and schedule to the engineer;

[0087] Check whether the base layer at the joint is flat and firm. If there are any foreign objects, they should be properly removed beforehand.

[0088] Check whether the overlap width at the weld is appropriate (≥60mm). The membrane surface at the joint should be flat and moderately tight to avoid forming a "fish mouth".

[0089] Positioning and bonding: Use a heat gun to bond the overlapping parts of the two membranes. The spacing between bonding points should not exceed 60-80 mm. The temperature of the heat gun must be controlled to avoid damaging the geomembrane, and it should not be easily torn apart.

[0090] Roughening: Use a roughening machine to roughen the membrane surface within a 30-40 mm width range at the weld seam to achieve thorough cleaning and create a rough surface. This increases the contact area, but the depth should not exceed 10% of the membrane thickness. When roughening, operate gently to minimize damage to the membrane surface.

[0091] Trial welding: Before formal welding, take a small sample of no less than 300×600 mm and perform a trial weld based on experience to preliminarily determine the equipment parameters. Then cut a test piece and conduct shear and peel tests on a tensile testing machine. If the test results meet the requirements, lock the equipment parameters and weld accordingly. Otherwise, readjust the machine, perform trial welding, and test again until it passes the test.

[0092] The criteria for judging whether a test weld is successful or unsuccessful are:

[0093] When performing shear and peel tests on bonded welds, only the film can be torn, not the weld joint can be damaged (i.e., FTB).

[0094] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0095] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A traceable construction device for geosynthetic seepage prevention projects, comprising a frame, wherein rollers are provided at the bottom of the frame; and an unwinding mechanism is provided on the frame for unwinding geomembrane rolls; characterized in that, The frame is also equipped with two sets of marking mechanisms for marking the geomembrane during unwinding. Each marking mechanism includes a lock fixed to the top of the frame. The lock core is coaxially connected to a second rotating shaft, which rotates when a key is inserted and turned. The second rotating shaft is driven by a rotatable first cam. A marking head is positioned below the first cam, above the geomembrane roll. A support is connected to the frame, and the marking head is slidably connected to the support. A first spring is fitted onto the marking head, with one end connected to the outer wall of the marking head and the other end connected to the support. A driving bevel gear is sleeved and connected to the second rotating shaft; the driving bevel gear meshes with a driven bevel gear; the driven bevel gear is sleeved and connected to the first rotating shaft, which is rotatably connected to the frame; the other end of the first rotating shaft is connected to the first cam. The frame is also equipped with a hopper, the bottom of which has a material outlet; a sealing plate is fitted at the bottom of the hopper to open or close the material outlet; a guide rail is welded to the outer wall of the hopper, and the sealing plate is slidably connected to the guide rail; an opening corresponding to the position of the material outlet is opened on the sealing plate. One end of the sealing plate is connected to a fork head adapted to the number of locks, and a friction wheel is rotatably connected to the end of the fork head; the frame is also rotatably connected to a spline shaft, on which a second cam and a third cam are sleeved and connected, and the second cam and the third cam are respectively configured to correspond to the fork head; each second rotating shaft has a shift fork connected to its bottom end, and one end of the shift fork has a U-shaped groove, which is configured to correspond one-to-one with the second cam and the third cam; when the second rotating shaft rotates, the shift fork swings, driving the corresponding second cam or third cam to move axially along the spline shaft to a position corresponding to the fork head.

2. The traceable construction device for geosynthetic seepage prevention projects according to claim 1, characterized in that, A limiting plate is also welded to one side of the sealing plate, and a second spring is connected to the limiting plate. The other end of the second spring is connected to the frame.

3. The traceable construction device for geosynthetic seepage prevention projects according to claim 1, characterized in that, A driven pulley is fixedly connected to the splined shaft, and a driving pulley is coaxially connected to the roller. A belt is hung between the driving pulley and the driven pulley.

4. The traceable construction device for geosynthetic seepage prevention projects according to claim 1, characterized in that, The unwinding mechanism includes an unwinding roller, which is rotatably connected to the frame; the geomembrane roll is inserted on the unwinding roller.

5. The traceable construction device for geosynthetic seepage prevention projects according to claim 1, characterized in that, The third cam is a quincunx cam.

6. A traceable construction method for geosynthetic seepage prevention projects, characterized in that, Includes the following steps: S1: Membrane transport; S2: Film spreading; S3: Cutting the film; S4: Trial laying of geomembrane; In this step, the geomembrane is laid using the geosynthetic seepage prevention engineering traceable construction device as described in any one of claims 1-5; S5: Inspection of welded parts, trial welding of geomembrane; S6: After the weldment inspection is passed, weld the geomembrane; S7: Sampling inspection; S8: Anchoring; S9: Inspection and acceptance.

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