Coating film for maintaining building pile body and maintaining method for underwater pile body of offshore building

Abstract

The invention relates to a coating film for maintaining a building pile body, the coating film comprises a coating film body, the coating film body is provided with a supporting area, and the supporting area is used for forming a gap between the coating film body and the building pile body when the building pile body is coated with the coating film body; the adhesive layers are used for bonding the coating film bodies and the pile body and bonding the laminated coating film bodies during coating, so that a gap between the supporting area and the pile body becomes a closed space; the coating film body is further provided with a channel used for injecting fluid into a gap formed between the coating film body and the building pile body. The coating film is simple in structure, can be used for maintaining a pile body of a land building and can also be used for maintaining an underwater pile body of a building in seawater.

Description

Technical Field

[0001] The invention relates to the technical field of building maintenance materials, in particular to a coating film for maintaining a building pile body and an underwater pile body maintenance method for an offshore building. Background Art

[0002] During the use, the piles of buildings will age and break, which will affect the service life of the buildings. For example, the piles of buildings on land will crack and break due to the increase in service life. The piles of buildings in coastal areas will deteriorate due to freeze-thaw, salt crystallization, carbonization, salt corrosion, alkali aggregate reaction, etc. in the coastal environment, leading to the deterioration of steel and concrete. In these cases, the piles of buildings need to be maintained. In addition, there are piles of offshore buildings. Since the piles of offshore buildings are immersed in seawater all year round, they face serious corrosion problems. Under the action of strong electrolyte seawater solutions containing various ions, the pile structure is prone to electrochemical corrosion. The attachment of microorganisms in the marine environment also poses a threat to the pile structure. Some microorganisms can produce highly corrosive substances, which accelerate the corrosion of the pile. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a covering film for maintaining a building pile body, the covering film comprising a covering film body, the covering film body being provided with a supporting area for forming a gap between the covering film body and the building pile body when the covering film body is covered on the building pile body;

[0004] and

[0005] An adhesive layer used for bonding the coating film body and the pile body and the laminated coating film bodies during coating so that the gap between the support area and the pile body becomes a closed space;

[0006] The coating membrane body is also provided with a channel for injecting fluid into the gap formed between the coating membrane body and the building pile body.

[0007] On the basis of the above solution, the gap formed between the covering membrane body and the building pile body in the support area is 4-8 mm.

[0008] Based on the above scheme, adhesive layers are arranged at both ends of a wide surface of the coating film body and one side of the middle part of the wide surface, and the other side of the middle part of the wide surface is a support area, on which a plurality of raised support particles are arranged.

[0009] On the basis of the above solution, the length of the adhesive layer located at both ends of the covering film body along the extending direction of the covering film body is greater than twice the circumference of the pile body.

[0010] On the basis of the above solution, the channel and the support area are respectively arranged on the two wide surfaces of the covering film body.

[0011] or

[0012] The channel is arranged between the covering film body and the supporting area.

[0013] Based on the above scheme, when the coating film body is wrapped around the pile body, the inlet is located at the upper end of the pile body and outside the coating film body, and the outlet is located at the lower end of the pile body and inside the coating film body.

[0014] On the basis of the above scheme, the inlet of the channel is arranged at the starting end of the support area and is located on both sides of the covering film body with the support area respectively;

[0015] The outlet of the channel is arranged at the terminal end of the support area and is located on the same side of the covering film body as the support area.

[0016] On the basis of the above solution, a through hole penetrating the wall of the covering film body is provided at the starting end of the supporting area of ​​the covering film body.

[0017] The present application also provides a method for maintaining an underwater pile of an offshore structure, using the above-mentioned coating film; the maintenance method comprises the following steps:

[0018] After the coating film body of the coating film is coated on the underwater pile body of the offshore structure, fresh water is injected into the gap formed between the coating film body and the underwater pile body of the structure through a channel, and then glue or slurry for maintenance is injected into the gap.

[0019] Based on the above scheme, the specific steps are as follows:

[0020] After the coating film body of the coating film is coated on the underwater pile body of the offshore structure, fresh water is injected into the channel through the inlet, and the fresh water enters the gap between the coating film body and the pile body from the outlet. With the injection of fresh water, the seawater in the gap is continuously discharged from the through hole;

[0021] In this process, the chloride ion content in the water flowing out of the through hole is monitored until the chloride ion content in the outflowing water reaches the predetermined requirement, and then the injection of fresh water is stopped;

[0022] Afterwards, glue or slurry is injected into the channel from the inlet, and when the gap is filled with glue or slurry, the through hole and the inlet are closed.

[0023] The coating film of the present application has a simple structure, and the coating film can be used for the maintenance of the pile body of a land building, and can also be used for the maintenance of the underwater pile body of a building in seawater. When maintaining the underwater pile body of a building, not only can the underwater pile body of the building in seawater be coated, but the seawater between the coating film and the pile body can also be diluted and cleaned, thereby removing ionic components that easily corrode the pile body, and at the same time, glue or slurry can be injected between the coating film and the pile body; this method can remove and strengthen the combination of the pile body and the protective layer (coating film), so that the pile body can be kept clean for a long time and isolated from the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the coating film in Example 1 of the present application;

[0026] Figure 2 A schematic diagram of the structure of the coating film support area in Example 1 of the present application;

[0027] Figure 3 This is another schematic diagram of the structure of the coating film support area in Example 1 of the present application;

[0028] Figure 4 A schematic diagram of the structure of the channel of the coating film in Example 1 of the present application (a groove is provided on the coating film body);

[0029] Figure 5 A schematic diagram of the structure of the channel of the coating membrane in Example 1 of the present application (the particle support layer forms a pleated cavity);

[0030] Figure 6 A schematic diagram of the structure of the channel of the coating membrane in Example 1 of the present application (a groove is provided on the particle support layer);

[0031] Figure 7 This is a schematic diagram of the coating film of the present application coated on a building pile;

[0032] Figure 8 The shape of the underwater pile of the building to which the coating membrane of the present application is applicable. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] The present application provides a coating film for maintaining building piles, such as Figure 1 As shown, the covering film comprises a covering film body 1, and the covering film body 1 is provided with a supporting area 11 for forming a gap between the covering film and the building pile body when the covering film is covered on the building pile body;

[0036] and

[0037] An adhesive layer 12 used for bonding the coating film body 1 and the pile body and the laminated coating film bodies 1 during coating so that the gap between the support area 11 and the pile body becomes a closed space;

[0038] The coating membrane body 1 is also provided with a channel 13 for injecting fluid into the gap formed between the coating membrane body 1 and the building pile body.

[0039] The function of the coating membrane body 1 is to cover the pile of the building to form a gap between the coating membrane body 1 and the pile (the size of the gap can be 4mm-8mm). In order to make the gap into a closed space, an adhesive layer 12 is used, such as Figure 7 As shown, when the coating begins, the end (starting end) of the coating film body 1 is all adhesive layer 12, so the coating film body 1 will be tightly bonded to the pile body, and as the coating proceeds, the adhesive layer 12 of the coating film covering the upper layer will be bonded to the outer wall (i.e., surface A) of the coating film superimposed on the lower layer, and at the end of the coating, the other end (terminating end) of the coating film body 1 is also all adhesive layer 12, so the adhesive layer 12 on the coating film body 1 will be tightly bonded to the pile body. After the coating is completed, the gap formed between the coating film body 1 and the pile body is sealed into a closed space (this closed space is connected from top to bottom).

[0040] The adhesive layer 12 is disposed on one side (i.e. Figure 1 In order to better bond the coating membrane body 1 with the pile body, as Figure 1As shown, adhesive layers 12 are provided at both ends of a wide surface (surface B) of the coating film body 1 and one side of the middle part of the wide surface, and the other side of the middle part of the wide surface is a support area 11 on which a plurality of protruding support particles 14 are provided.

[0041] from Figure 1 It can be seen that the support area 11 of the coating film body 1 does not extend to the two ends of the coating film body 1; the length from the end of the support area 11 to the end of the coating film body 1 on the corresponding side (that is, the length of the adhesive layer 12 located at the two ends of the coating film body 1 along the extension direction of the coating film body 1) is greater than 2 times the circumference of the pile body, so that during coating, the adhesive layer 12 can completely seal the upper and lower ends of the enclosed space at both the starting end and the ending end.

[0042] There are many ways to set the support area 11. This application provides two specific implementation cases:

[0043] The first method: Figure 1 and Figure 2 As shown, an adhesive layer 12 is provided at both ends of one side of the coating film body 1 and one side of the middle part, and the other side of the empty middle part is not provided with an adhesive layer 12, but a plurality of protruding support particles 14 are provided thereon (the support particles 14 may also be an integrated structure with the coating film body 1);

[0044] The second method: Figure 1 and Figure 3 As shown, an adhesive layer 12 is completely disposed on one surface of the covering film body 1 , and then a particle support layer with support particles 14 is laid on the adhesive layer 12 to form a support area 11 .

[0045] There are also many ways to set up channel 13. This application provides four specific implementation cases;

[0046] The first one, such as Figure 1 , Figure 2 and Figure 3 As shown, the covering film body 1 is on the back side of the adhesive layer 12 (i.e. Figure 1 A hose is provided on the A side in the figure, and the hose serves as a channel 13; the hose can be directly bonded to the covering film body 1.

[0047] The second type, such as Figure 4 As shown, based on Figure 3 In the arrangement of the support area 11, a groove is arranged in advance on the coating film body 1 along the length direction of the coating film body 1, and when the adhesive layer 12 is arranged, the groove is left empty, and then the particle support layer with support particles 14 is laid on the adhesive layer 12, so that the particle support layer and the groove on the coating film body 1 together form a channel 13;

[0048] The third type, such as Figure 5 As shown, based on Figure 3 In the arrangement of the support area 11, when the adhesive layer 12 is arranged on the coating film body 1, a long strip area without adhesive is reserved in advance along the length direction of the coating film body 1, and then a particle support layer with support particles 14 is laid on the adhesive layer 12 on one side of the long strip area, and then the particle support layer is squeezed to form a pleated cavity above the area without adhesive, and finally the particle support layer is adhered to the adhesive layer 12 on the other side of the long strip area, so that the particle support layer, the adhesive layer 12 and the coating film body 1 together form a channel 13;

[0049] The fourth type, such as Figure 6 As shown, based on Figure 3 In the setting method of the support area 11, when the adhesive layer 12 is set on the coating film body 1, a long strip area without adhesive is reserved in advance along the length direction of the coating film body 1, and a groove is preset on the particle support layer. When the particle support layer is laid, the groove corresponds to the long strip area without adhesive, so that the groove of the particle support layer, the adhesive layer 12 and the coating film body 1 will jointly form a channel 13.

[0050] The channel 13 is used to inject fluid into the gap formed between the coating membrane body 1 and the building pile body. In order to more conveniently inject fluid into the gap, Figure 1 and Figure 7 As shown, the outlet 132 of the channel 13 is arranged at the terminal end of the support area 11. In order to prevent a single outlet 132 from being blocked during use, a plurality of outlets 132 through the channel 13 are arranged at the terminal end of the support area 11.

[0051] The inlet 131 of the channel 13 is disposed at the starting end of the support area 11 and is located on both sides of the covering film body 1 together with the support area 11 .

[0052] The starting end refers to the head end of the covering film body 1, that is, the first part that is wrapped around the pile body when the covering film body 1 is wrapped around the pile body.

[0053] The termination end refers to the tail end of the covering film body 1, that is, the last part of the covering film body 1 when it is wrapped around the pile body.

[0054] like Figure 7 As shown, after the coating film body 1 is wrapped around the pile body from top to bottom, the inlet 131 is located at the upper end of the pile body and on the outside of the coating film body 1 , and the outlet 132 is located at the lower end of the pile body and on the inside of the coating film body 1 .

[0055] Since the gap between the coating membrane body 1 and the pile body is closed and filled with water, the water inside needs to be removed when injecting fluid into the channel 13. For this purpose, based on the above technical solution, a through hole 15 penetrating the wall of the coating membrane body 1 is provided at the starting end of the support area 11 of the coating membrane body 1.

[0056] The coating film in this embodiment can be applied to a variety of building pile shapes, such as Figure 8 The shapes shown are cylindrical, square, elliptical cylinder or truncated cone.

[0057] During the coating, the operator can directly carry a coating film roll (the shape of the coating film roll is similar to a large tape roll) for coating and fixing, or use tools in the prior art.

[0058] Example 2

[0059] Based on the coating film in Example 1, the present application provides a method for maintaining piles of onshore buildings.

[0060] For the piles of buildings completely on land, cracks and breakages may occur due to the increase of service life. For the piles of buildings in coastal areas, the freeze-thaw, salt crystallization, carbonization, salt corrosion, alkali aggregate reaction and the like in the coastal environment may lead to the deterioration of steel bars and concrete. In these cases, the piles of buildings need to be maintained. During maintenance, the coating film in this embodiment is used, and polyethylene (PE) can be used for the coating film body 1 and the supporting particles 12, and the viscose used in the viscose layer 12 of the coating film can be a commercially available common viscose (such as the glue used on the packaging tape).

[0061] During maintenance, the coating film is wrapped around the pile of the building, and fluid (the fluid is glue or slurry) is injected into the channel 13 from the inlet 131. When the glue or slurry fills the gap, the through hole 15 and the inlet 131 are closed.

[0062] When wrapping, the operator can directly carry the wrapping film roll (the shape of the wrapping film roll is similar to a large tape roll) for wrapping and fixing. Wrapping can be done in a spiral downward manner or in a spiral upward manner. Figure 7 What is shown is the state after the spiral downward coating. No matter whether the spiral downward or spiral upward coating method is adopted, after coating, the through hole 15 and the inlet 131 need to be at the upper part of the pile body, and the outlet 132 needs to be at the lower part of the pile body.

[0063] In addition to the manual wrapping method, other existing auxiliary winding and wrapping devices can also be used, such as the winding device in patent CN117604915A.

[0064] The above-mentioned glue can be epoxy resin AB glue, and the slurry can be cement-water glass double liquid slurry.

[0065] Example 3

[0066] Based on the coating film in Example 1, the present application provides a method for maintaining underwater pile bodies of offshore structures, specifically, after the coating film body 1 of the coating film is coated on the underwater pile body of the structure, glue or slurry for maintenance is then injected into the gap.

[0067] As a specific implementation plan, the specific method of maintenance is as follows:

[0068] After the coating membrane body 1 of the coating membrane is coated on the underwater pile body of the building, fresh water is injected into the channel 13 through the inlet 131, and the fresh water enters the gap between the coating membrane body 1 and the pile body from the outlet 132. With the injection of fresh water, the seawater in the gap is continuously discharged from the through hole 15; in this process, the seawater between the coating membrane body 1 and the pile body will slowly be continuously discharged from the through hole 15, so the concentration of chloride ions in the water body in the gap gradually decreases.

[0069] In this process, the chloride ion content in the water flowing out of the through hole 15 is monitored until the chloride ion content in the outflowing water reaches a predetermined requirement, and then the injection of fresh water is stopped;

[0070] Afterwards, glue or slurry is injected into the channel 13 from the inlet 131 . When the glue or slurry fills the gap, the through hole 15 and the inlet 131 are closed.

[0071] In order to make the injected glue or slurry play a better role, after stopping the injection of fresh water, the fresh water in the gap is firstly pumped out from the inlet 131 as much as possible.

[0072] The coating film body 1 and the supporting particles 12 can both be made of polyethylene (PE); the adhesive of the adhesive layer 12 can be commercially available adhesive suitable for underwater use, or the glue in patent CN114790369A.

[0073] During covering, the operator can directly carry the covering film roll for covering and fixing, first fix the covering film on the pile body above water, and then use the spiral downward method to go into the water for fixing.

[0074] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A coating film for maintaining a building pile, the coating film comprising a coating film body (1), characterized in that: The coating film body (1) is provided with a support area (11) for forming a gap between the coating film body (1) and the building pile body when the coating film body (1) is coated on the building pile body; and An adhesive layer (12) used for bonding the coating film body (1) and the pile body and the coating film bodies (1) stacked together during coating so that the gap between the support area (11) and the pile body becomes a closed space; The coating membrane body (1) is also provided with a channel (13) for injecting fluid into the gap formed between the coating membrane body (1) and the building pile body.

2. The coating film for maintaining building piles according to claim 1, characterized in that: The support area (11) forms a gap of 4-8 mm between the coating membrane body (1) and the building pile body.

3. The coating film for maintaining building piles according to claim 1, characterized in that: An adhesive layer (12) is provided at both ends of a wide surface of the coating film body (1) and on one side of the middle part of the wide surface, and the other side of the middle part of the wide surface is a support area (11), and a plurality of protruding support particles (14) are provided on the support area (11).

4. The coating film for maintaining building piles according to claim 3, characterized in that: The length of the adhesive layer (12) located at both ends of the coating film body (1) along the extension direction of the coating film body (1) is greater than twice the circumference of the pile body.

5. The coating film for maintaining building piles according to claim 1, characterized in that: The channel (13) and the support area (11) are respectively arranged on two wide surfaces of the coating film body (1). or The channel (13) is arranged between the coating film body (1) and the supporting area (11).

6. The coating film for maintaining building piles according to claim 1, characterized in that: When the coating film body (1) is wrapped around the pile body, the inlet (131) is located at the upper end of the pile body and outside the coating film body (1), and the outlet (132) is located at the lower end of the pile body and inside the coating film body (1).

7. The coating film for maintaining building piles according to claim 6, characterized in that: The inlet (131) of the channel (13) is arranged at the starting end of the support area (11) and is located on both sides of the coating membrane body (1) together with the support area (11); The outlet (132) of the channel (13) is arranged at the terminal end of the support area (11) and is located on the same side of the coating membrane body (1) as the support area (11).

8. The coating film for maintaining building piles according to claim 6, characterized in that: A through hole (15) penetrating the wall of the covering film body (1) is arranged at the starting end of the supporting area (11) of the covering film body (1).

9. A method for maintaining underwater piles of offshore structures, characterized in that: Using the coating film according to any one of claims 1 to 8; the maintenance method comprises the following steps: After the coating film body (1) of the coating film is coated on the underwater pile body of the offshore structure, fresh water is injected into the gap formed between the coating film body (1) and the underwater pile body of the structure using the channel (13), and then glue or slurry for maintenance is injected into the gap.

10. The method for maintaining underwater piles of buildings according to claim 9, characterized in that: The specific steps are as follows: After the coating membrane body (1) of the coating membrane is coated on the underwater pile body of the offshore structure, fresh water is injected into the channel (13) through the inlet (131), and the fresh water enters the gap between the coating membrane body (1) and the pile body from the outlet (132), and as the fresh water is injected, the seawater in the gap is continuously discharged from the through hole (15); In this process, the chloride ion content in the water flowing out from the through hole (15) is monitored, and the injection of fresh water is stopped when the chloride ion content in the flowing water reaches a predetermined requirement; Afterwards, glue or slurry is injected into the channel (13) from the inlet (131), and when the glue or slurry fills the gap, the through hole (15) and the inlet (131) are closed.

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