Connecting method of multiple sections of impermeable membrane curtains for underground construction
Through the integrated equipment of underground connecting columns, grooved and membrane grafting, combined with electromagnetic auxiliary devices and ultrasonic welding, the problem of difficulty in connecting anti-seepage films in underground construction is solved, and the reliable connection and anti-seepage performance of anti-seepage films are achieved.
Patent Information
- Application Number
- CN202510368244.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-08-08
AI Technical Summary
In the prior art, multiple anti-seepage films are difficult to effectively connect in a mud environment during underground construction, resulting in insufficient anti-seepage performance of the anti-seepage curtain.
The integrated equipment of underground connecting columns, grooved and membrane grafting are adopted, combined with electromagnetic auxiliary devices and ultrasonic welding, and the tight overlap and fixed connection of the edges of the anti-seepage film are achieved, and the strength of the connecting nodes is enhanced through the infusion and curing of the filling material.
In a mud environment, the anti-seepage film is effectively implanted and reliable connection, which improves the anti-seepage performance of the anti-seepage curtain and improves the construction efficiency and quality.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of underground anti-seepage curtain wall construction, in particular to an anti-seepage membrane splicing technology, specifically a method for connecting multiple sections of anti-seepage membrane curtains for underground construction. Background Art
[0002] An "anti-seepage curtain wall" refers to a vertical structure composed of cement-soil mixing piles, concrete walls, steel sheet piles, or an anti-seepage membrane, arranged continuously within a certain range and depth underground. Its function is to block the migration of groundwater or pollutants. Among various anti-seepage curtain wall materials, cement-soil mixing piles are widely used due to their relatively low cost. However, cement-soil mixing piles have relatively poor anti-seepage performance, making them inadequate for projects with demanding anti-seepage requirements.
[0003] To improve anti-seepage performance, concrete walls and steel sheet piles are also used as materials for anti-seepage curtain walls. Although these two materials have high anti-seepage performance, they are expensive, and steel sheet piles are less durable and prone to problems during use. Therefore, finding an anti-seepage material with excellent performance and reasonable cost is particularly important.
[0004] High-density polyethylene membranes and sodium-bentonite waterproofing blankets, among other polymer materials, offer exceptionally high impermeability and are increasingly becoming the preferred materials for anti-seepage curtain walls. However, the width of these materials is limited by production equipment, transportation facilities, and even production costs. Typically, a single roll of anti-seepage curtain material is insufficient to cover the entire work surface. In actual construction, multiple rolls of anti-seepage curtain material must be stacked horizontally at their edges to achieve full coverage.
[0005] During the horizontal deployment of anti-seepage curtains, hot-melt welding, geomembrane tape, and geomembrane glue are commonly used connection methods. However, after the vertical installation of the anti-seepage membrane underground, the muddy environment poses a significant challenge to the connection work. These connection methods are difficult to implement directly and effectively in muddy environments. Ensuring that multiple anti-seepage membranes are effectively connected and prevented from disengaging during underground construction has become a key issue in improving the actual anti-seepage performance of anti-seepage curtains. Summary of the Invention
[0006] In response to the problems existing in the prior art, the present invention proposes a connection method for underground multi-section anti-seepage membrane curtains, aiming to ensure that reliable connections can be established between the various rolls of materials constituting the anti-seepage curtain, thereby significantly improving the actual anti-seepage performance of the anti-seepage curtain.
[0007] In order to achieve the above object, the present invention is achieved as follows: A method for connecting multiple sections of impermeable membrane curtains for underground construction includes integrated grooving and membrane planting equipment, underground connecting columns inserted into the ground, and an impermeable membrane. The method includes the steps of simultaneously cutting the underground connecting columns during the grooving process, inserting the edges of the impermeable membrane into the cuts, continuously and fixedly overlapping the edges of adjacent impermeable membranes in the underground connecting columns, and finally pouring a filling material into the underground connecting columns.
[0008] Furthermore, the connection method specifically includes: a) According to the width of a single anti-seepage membrane, set the hole spacing and carry out the hole-making operation; b) After the holes are drilled, insert underground connecting columns into all the holes in sequence; c) Using integrated slotting and membrane planting equipment, cut slots and simultaneously plant membranes underground between adjacent underground connecting columns. During the downward slotting process, the tubular underground connecting columns are also cut. The cuts formed are used to insert and accommodate the edge of the anti-seepage membrane during the simultaneous membrane planting process. d) using auxiliary devices to ensure that the edges of adjacent anti-seepage membranes in the anti-seepage membrane connection nodes are continuously overlapped with each other; e) forming a continuous fixed connection between the overlapping portions of the edges of the anti-seepage membrane by a connecting device; f) Remove the auxiliary device or connecting device, pour the filling material into the connection node of the anti-seepage membrane and wait for it to solidify and form; g) Repeat steps c to f until the length of the continuous anti-seepage curtain wall formed by the anti-seepage membrane connection nodes and the anti-seepage membrane meets the design requirements.
[0009] Furthermore, in the above-mentioned method for connecting multiple sections of anti-seepage membrane curtains for underground construction, the overlapping portions of the edges of the anti-seepage membrane form a continuous fixed connection with each other, which means that the edges of the anti-seepage membrane are further fixedly connected to each other after overlapping with each other by at least one of adhesion, welding, fusion, and binding methods. When the adhesion method is used, the adhesive used should have the properties of being waterproof and resistant to underground environmental corrosion.
[0010] Furthermore, in the above-mentioned method for connecting multiple sections of anti-seepage membrane curtains for underground construction, in step d, the auxiliary device refers to a pair of electromagnets based on electromagnetic principles, and the electromagnets are respectively located on both sides of the overlapping parts of adjacent anti-seepage membranes. When powered on, the pressure generated by the mutual attraction of the electromagnets compacts the overlapping parts of the edges of adjacent anti-seepage membranes.
[0011] Furthermore, in the above-mentioned method for connecting multiple sections of anti-seepage membrane curtains for underground construction, in step e, the connecting device refers to an ultrasonic welding device, which includes an energy generator retained on the ground, and also includes a transducer and a welding head submerged in the hole; in the process of forming a continuous fixed connection between the edges of the anti-seepage membrane, the welding head of the ultrasonic welding device pierces the surface of the anti-seepage membrane on one side, does not penetrate the anti-seepage membrane on the other side, but rubs the contact surface of the anti-seepage membrane at high frequency, generates instantaneous high heat at the connecting surface of the two membranes, causing them to partially melt, thereby realizing the welding of the overlapping parts of the anti-seepage membranes on both sides; wherein, the ultrasonic welding device has adjustable welding frequency and power to adapt to anti-seepage membranes of different materials and thicknesses.
[0012] Furthermore, in the above-mentioned method for connecting multiple sections of anti-seepage membrane curtains for underground construction, the auxiliary device and the connecting device are integrated into one; specifically, the connecting device is provided on one of the electromagnets constituting the auxiliary device, and the connecting device can be an ultrasonic welding device, a binding device or other connecting methods; in this way, when the auxiliary device compacts the overlapping part of the anti-seepage membrane during the sinking process in the underground connecting column, the connecting device simultaneously implements an effective connection on the overlapping part.
[0013] Furthermore, in the above-mentioned method for connecting multiple sections of anti-seepage membrane curtains for underground construction, the auxiliary device is provided with a counterweight so that it can overcome the resistance in the underground connecting column and slide down along the anti-seepage membrane to the bottom of the underground connecting column. During the sliding process, the pressure generated by the mutual attraction of the electromagnets compacts the overlapping parts of the edges of adjacent anti-seepage membranes. After reaching the bottom, it is recovered to the ground working position by relying on the traction rope on the auxiliary device.
[0014] Furthermore, in the above-mentioned method for connecting multiple sections of anti-seepage membrane curtains for underground construction, the underground connecting column is in the shape of a circular PE pipe with corrugations on the outside.
[0015] Furthermore, in the above-mentioned method for connecting multiple sections of anti-seepage membrane curtains for underground construction, the ultrasonic welding device also includes a control system for adjusting welding pressure and welding time to accurately control the welding process and improve welding quality and efficiency; the ultrasonic welding can be equivalently replaced by laser welding or hot plate welding.
[0016] Furthermore, in the above-mentioned method for connecting multiple sections of anti-seepage membrane curtains for underground construction, when the binding method is adopted, the binding points should be evenly distributed to ensure the strength and stability of the connection.
[0017] The beneficial effects of the present invention are: 1. Through the cooperation of underground connecting columns and integrated grooving and membrane planting equipment, the effective implantation and connection of the anti-seepage membrane in the mud environment is achieved; 2. The application of electromagnetic auxiliary device ensures the close overlap of the edges of adjacent anti-seepage membranes and improves the reliability of the connection; 3. The use of fixed connection methods such as ultrasonic welding achieves a quick and firm connection of the edge of the anti-seepage membrane, improving construction efficiency and quality; 4. The pouring and solidification of the filling material further enhances the strength and stability of the connection nodes of the anti-seepage membrane and improves the anti-seepage performance of the entire anti-seepage curtain. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the working state in which the auxiliary device and the connecting device shown in the present invention are integrated into one.
[0019] Figure 2 This is a reference diagram of the steps of the connection method of the multi-section anti-seepage membrane curtain shown in the present invention. DETAILED DESCRIPTION
[0020] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0021] Example 1 In this embodiment, ultrasonic welding is used as the connection method of the anti-seepage membrane.
[0022] A method for connecting multiple sections of anti-seepage membrane curtains for underground construction, comprising the following steps: First, the spacing between the holes is set according to the width of the single-sheet impermeable membrane, and the holes are drilled. Once the holes are drilled, underground connecting posts are sequentially inserted into all the holes. These underground connecting posts are round or corrugated PE pipes, which offer excellent economical and workability.
[0023] Next, integrated slotting and membrane planting equipment is used to cut slots and simultaneously plant membranes between adjacent underground connecting posts. During the downward slotting process, the tubular underground connecting posts are simultaneously cut, forming an incision. The edge of the impermeable membrane is inserted and accommodated in the incision during the simultaneous membrane planting process. During this process, the edge of the impermeable membrane is not pre-curled but rather maintained flat. When the edges of two adjacent impermeable membranes lie within the same underground connecting post, this connection point becomes the impermeable membrane connection node.
[0024] Subsequently, an electromagnetic assist device is used to continuously overlap the edges of adjacent membranes within the underground connecting column. A pair of electromagnets 1 and 1' in the electromagnetic assist device are located on either side of the overlapping portion of the adjacent membranes (i.e., the membrane connection node). When energized, the pressure generated by the mutual attraction between the electromagnets 1 and 1' compacts the overlapping portion of the membrane edges. To ensure the electromagnetic assist device slides smoothly to the bottom of the underground connecting column, the device may also be equipped with a counterweight.
[0025] After the edges of adjacent impermeable membranes are overlapped, an ultrasonic welding device is used to heat them, bonding them and forming a continuous, fixed connection. The ultrasonic welding device includes an energy generator retained on the ground, a transducer embedded in the hole, and a welding head 2. During the welding process, the welding head 2 pierces the surface of one impermeable membrane (without penetrating the other membrane), rubbing against the contact surface of the membrane at high frequency, generating instantaneous high heat at the connecting surface of the two membranes, causing them to partially melt, thereby achieving welding. The ultrasonic welding device has adjustable welding frequency and power to accommodate impermeable membranes of different materials and thicknesses. Furthermore, the ultrasonic welding device includes a control system for adjusting welding pressure and welding time to precisely control the welding process and improve welding quality and efficiency.
[0026] Finally, a filling material is poured into the connection node of the anti-seepage membrane and allowed to solidify and take shape. The filling material is a curing agent or other suitable material. The filling material can further enhance the strength and stability of the connection node of the anti-seepage membrane.
[0027] It is worth noting that Figure 1 In an embodiment of the present invention, the auxiliary device and the connecting device are integrated into one. Specifically, a connecting device (such as the welding head 2 of an ultrasonic welding device) is fixed to one of the electromagnets 1 or 1' that constitute the auxiliary device. In this way, as the auxiliary device compacts the overlapping portions of adjacent anti-seepage membranes during its sinking process within the underground connecting column, the connecting device simultaneously and effectively connects these overlapping portions. This approach not only improves construction efficiency but also ensures the stability and reliability of the connection process. Furthermore, to adapt to different underground environments and anti-seepage membrane materials, the welding frequency, power, welding pressure, and welding time of the ultrasonic welding device can be adjusted according to actual conditions to achieve the optimal welding effect.
[0028] Example 2 like Figure 2 In this embodiment, in addition to adopting the same ultrasonic welding method as in the first embodiment, a semicircular positioning block 3 is used to assist in the implantation of the anti-seepage membrane.
[0029] Steps 1 to 3 of Example 2 are the same as those of Example 1, and the following is as follows: After the first anti-seepage membrane is implanted into the first underground connecting column, the implanted anti-seepage membrane is pressed to one side of the connecting column using the semicircular positioning block 3 .
[0030] Then, a second anti-seepage membrane is implanted into the same connecting column. At this time, due to the function of the positioning block 3, the second anti-seepage membrane can be smoothly sent down and closely attached to the other side of the connecting column.
[0031] The subsequent steps are the same as those in the first embodiment, and the anti-seepage membrane is closed and ultrasonically welded using the integrated auxiliary device and connecting device.
[0032] After the filling material is poured in and solidified, the connection of the anti-seepage curtain wall is completed.
[0033] During the implementation of the above-mentioned embodiment 1 and embodiment 2, it should be noted that the auxiliary device and connecting device are integrated into one. In the subsequent steps, when the edge of the anti-seepage membrane is hot-melt connected, the anti-seepage membrane is temporarily fixed in the underground connecting column by the integrated grooving and film-planting equipment. The integrated auxiliary device and connecting device in operation are pulled up from the underground connecting column by the pulling equipment or the winch equipment, and then the anti-seepage membrane is released by the integrated grooving and film-planting equipment, so that it remains in the underground connecting column by its own gravity. This is beneficial in that when the auxiliary device and the connecting device are working, the upward pulling force will not bring up the anti-seepage membrane.
[0034] Compared with the overlapping hot-melt method used in the anti-seepage membrane in the first and second embodiments, the overlapping of the anti-seepage membrane in the present invention can also be achieved in the following two ways.
[0035] Example 3 In this embodiment, the adhesion method is used as the connection method between the anti-seepage membranes; the remaining construction methods refer to Example 1 and Example 2.
[0036] A method for connecting multiple sections of anti-seepage membrane curtains for underground construction, comprising the following steps: a) Set the hole spacing according to the width of a single anti-seepage membrane and carry out the hole-guiding operation.
[0037] b) After the holes are drilled, insert underground connecting columns into all the holes in sequence.
[0038] c) Using integrated slotting and membrane planting equipment, cut slots underground between adjacent underground connecting columns and simultaneously plant the membrane. During this process, the edges of the membrane should not be pre-curled; instead, they should be kept flat. Multiple Velcro strips should be applied in sections to the outer edges of the membrane, with waterstops added between the Velcro strips.
[0039] d) During the synchronous membrane planting process, the edge of the anti-seepage membrane is inserted into and accommodated in the cutout of the underground connecting column. When the edges of two adjacent anti-seepage membranes are located in the same underground connecting column, this connection point becomes the anti-seepage membrane connection node.
[0040] e) The edges of adjacent membranes are continuously overlapped within the underground connecting column using an electromagnetic-assisted device. A pair of electromagnets in the electromagnetic-assisted device are located on either side of the overlapping portion of the adjacent membranes (i.e., the junction of the membranes). When energized, the mutual attraction of the electromagnets creates pressure that compacts the overlapping portion of the membranes, ensuring a tight fit between the Velcro strips and achieving a preliminary connection between the membranes.
[0041] f) Under the action of the electromagnetic auxiliary device, the Velcro fits tightly and the waterstop forms an anti-seepage partition, thereby achieving a reliable connection of the anti-seepage membrane.
[0042] g) Remove the electromagnetic assist device, pour filling material into the connection node of the anti-seepage membrane and wait for it to solidify and form, so as to further enhance the strength and stability of the connection node of the anti-seepage membrane.
[0043] h) Repeat steps c to g until the length of the continuous anti-seepage curtain wall formed by the anti-seepage membrane connection nodes and the anti-seepage membrane meets the design requirements.
[0044] Example 4 In this embodiment, the adhesion method is used as the connection method between the anti-seepage membranes; the remaining construction methods refer to Example 3.
[0045] A method for connecting multiple sections of anti-seepage membrane curtains for underground construction, comprising the following steps: Steps a) to c) are the same as those in Example 3.
[0046] d) During the synchronous membrane planting process, the edge of the anti-seepage membrane is inserted into and accommodated in the cutout of the underground connecting column. When the edges of two adjacent anti-seepage membranes are located in the same underground connecting column, this connection point becomes the anti-seepage membrane connection node.
[0047] e) The edges of adjacent impermeable membranes are continuously overlapped within underground connecting columns using an electromagnetic-assisted device. A pair of electromagnets in the electromagnetic-assisted device are located on either side of the overlapping portion of the adjacent impermeable membranes. When energized, the mutual attraction of the electromagnets creates pressure that compacts the overlapping portion of the adjacent membrane edges.
[0048] f) While the electromagnetic-assisted device is compacting the edges of adjacent membranes, use a stapling device in the form of a stapler to staple the overlapping portions of the membrane. The stapling points should be evenly distributed to ensure the strength and stability of the joints. After stapling is complete, remove the electromagnetic-assisted device.
[0049] g) Pour filling material into the connection nodes of the anti-seepage membrane and wait for it to solidify and form, so as to further enhance the strength and stability of the connection nodes of the anti-seepage membrane.
[0050] h) Repeat steps c to g until the length of the continuous anti-seepage curtain wall formed by the anti-seepage membrane connection nodes and the anti-seepage membrane meets the design requirements.
[0051] Furthermore, in the above-mentioned method for connecting multiple sections of anti-seepage membrane curtains for underground construction, the underground connecting column is in the shape of a circular PE pipe with corrugated outer side, which has good economy and construction operability.
[0052] As can be seen from the above examples, the connection method for underground multi-section impermeable membrane curtains proposed by the present invention not only ensures reliable connection between the impermeable membranes, improving the impermeable performance of the impermeable curtain wall, but also optimizes construction efficiency and cost-effectiveness. Furthermore, the use of integrated auxiliary and connecting devices, as well as semicircular positioning blocks, further enhances the convenience and accuracy of construction.
[0053] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A method for connecting multiple sections of anti-seepage membrane curtains for underground construction, comprising slotting, membrane planting integrated operation equipment, underground connecting columns inserted into the ground, and an anti-seepage membrane; characterized in that: The connection method includes the steps of synchronously cutting the underground connection column during the grooving process, inserting the edge of the anti-seepage membrane into the incision, fixing the edges of adjacent anti-seepage membranes to overlap each other continuously in the underground connection column, and finally pouring filling material into the underground connection column.
2. The method for connecting multiple sections of anti-seepage membrane curtains for underground construction according to claim 1, wherein: The connection method specifically includes a) According to the width of a single anti-seepage membrane, set the hole spacing and carry out the hole-making operation; b) After the holes are drilled, insert underground connecting columns into all the holes in sequence; c) Utilizing integrated slotting and membrane planting equipment, slotting and membrane planting are performed underground between adjacent underground connecting posts. During the downward slotting process, the tubular underground connecting posts are also cut. The cuts formed are used to insert and accommodate the edges of the impermeable membrane during the membrane planting process. The edges of the impermeable membrane are not pre-curled and must be kept flat. In this way, when the edges of two adjacent anti-seepage membranes are located in the same underground connecting column, this connection point becomes an anti-seepage membrane connection node; d) using auxiliary devices to ensure that the edges of adjacent anti-seepage membranes in the anti-seepage membrane connection nodes are continuously overlapped with each other; e) forming a continuous fixed connection between the overlapping portions of the edges of the anti-seepage membrane by a connecting device; f) Remove the auxiliary device or connecting device, pour the filling material into the connection node of the anti-seepage membrane and wait for it to solidify and form; g) Repeat steps c to f until the length of the continuous anti-seepage curtain wall formed by the anti-seepage membrane connection nodes and the anti-seepage membrane meets the design requirements.
3. The method for connecting multiple sections of anti-seepage membrane curtains for underground construction according to claim 1 or 2, characterized in that: The overlapping parts of the edges of the anti-seepage membrane form a continuous fixed connection with each other, which means that the edges of the anti-seepage membrane are further fixedly connected to each other after overlapping with each other by at least one method among adhesion, welding, fusion and binding. Among them, when using the adhesion method, the adhesive used should have the characteristics of being waterproof and resistant to underground environment corrosion.
4. The method for connecting multiple sections of anti-seepage membrane curtains for underground construction according to claim 2, wherein: In step d, the auxiliary device refers to a pair of electromagnets based on the electromagnetic principle, which are respectively located on both sides of the overlapping parts of adjacent anti-seepage membranes. When powered on, the pressure generated by the mutual attraction of the electromagnets compacts the overlapping parts of the edges of adjacent anti-seepage membranes.
5. The method for connecting multiple sections of anti-seepage membrane curtains for underground construction according to claim 2, wherein: In step e, the connecting device refers to an ultrasonic welding device, which includes an energy generator retained on the ground, and also includes a transducer and a welding head submerged in the hole; in the process of forming a continuous fixed connection between the edges of the anti-seepage membrane, the welding head of the ultrasonic welding device pierces the surface of the anti-seepage membrane on one side, does not penetrate the anti-seepage membrane on the other side, but rubs the contact surface of the anti-seepage membrane at high frequency, generates instantaneous high heat at the connecting surface of the two membranes, causing them to partially melt, thereby achieving the welding of the overlapping parts of the anti-seepage membranes on both sides; wherein, the ultrasonic welding device has adjustable welding frequency and power to adapt to anti-seepage membranes of different materials and thicknesses.
6. The method for connecting multiple sections of anti-seepage membrane curtains for underground construction according to any one of claims 4 or 5, characterized in that: The auxiliary device and the connecting device are integrated into one; specifically, the connecting device is provided on one of the electromagnets constituting the auxiliary device, and the connecting device can be an ultrasonic welding device, a binding device or other connecting methods; in this way, when the auxiliary device compacts the overlapping part of the anti-seepage membrane during the sinking process in the underground connecting column, the connecting device simultaneously implements an effective connection on the overlapping part.
7. The method for connecting multiple sections of anti-seepage membrane curtains for underground construction according to claim 4, wherein: The auxiliary device is equipped with a counterweight, which enables it to overcome the resistance in the underground connecting column and slide down along the anti-seepage membrane to the bottom of the underground connecting column. During the sliding process, the pressure generated by the mutual attraction of the electromagnets compacts the overlapping parts of the edges of adjacent anti-seepage membranes. After reaching the bottom, it is recovered to the ground working position by relying on the traction rope on the auxiliary device.
8. The method for connecting multiple sections of anti-seepage membrane curtains for underground construction according to claim 1, wherein: The underground connecting column is in the shape of a circular PE pipe with corrugated outer side.
9. The method for connecting multiple sections of anti-seepage membrane curtains for underground construction according to claim 5, wherein: The ultrasonic welding device also includes a control system for adjusting welding pressure and welding time to accurately control the welding process and improve welding quality and efficiency; the ultrasonic welding can be equivalently replaced by laser welding or hot plate welding.
10. The method for connecting multiple sections of anti-seepage membrane curtains for underground construction according to claim 3, wherein: When stapling is used, the binding points should be evenly distributed to ensure the strength and stability of the joint.