Separation joint structure for waterproof layer protection concrete and construction method

Abstract

The invention discloses a partition seam structure for waterproof layer protection concrete and a construction method, and relates to the field of building partition seams, the partition seam structure comprises a base, a partition mechanism is arranged above the base, the partition mechanism comprises a partition body plate, and the bottom of the partition body plate is connected with an inner cavity of the base in an inserted mode; the separation body and the base are in deep insertion connection, and the first plastic nails penetrating through the side wall of the base and the separation body are used in an auxiliary mode, so that reliable transverse constraint is formed, floating or displacement possibly occurring in the concrete pouring and vibrating process of the separation body is effectively restrained, and it is guaranteed that the separation seam is accurately positioned, and the linear shape is straight; a butt joint seat arranged at the top is fixed to the top of the partition body through a second plastic nail, and the overall connection strength and shear resistance are improved; the cover strip body is in mechanical clamping connection with the barb groove in the inner wall of the butt joint base through the installation hook on the lower portion of the cover strip body, a detachable structure is formed, the cover strip body can be independently replaced when aged and damaged, and the separation body and the peripheral filling layer do not need to be disturbed.

Description

Technical Field

[0001] This invention relates to building expansion joint technology, specifically to an expansion joint structure and construction method for waterproof concrete protection. Background Technology

[0002] The construction of the expansion joints in the protective concrete of the waterproof layer for flat roofs is a crucial step in preventing irregular cracks in the rigid protective layer of the roof due to temperature stress and ensuring the long-term integrity of the waterproof system. The stability and durability of the expansion joint structure directly determine the overall quality and maintenance cost of the roof project. In traditional construction practices, hot-melt asphalt (commonly known as tar) is usually used to form expansion joints. However, this traditional process faces drawbacks in practical applications: the construction cycle is long and heavily influenced by weather conditions; high labor costs keep the project cost high; and on-site hot-melt operations make it difficult to guarantee the density and straightness of the grouting lines, resulting in large fluctuations in construction quality and a high risk of leakage.

[0003] To overcome the aforementioned drawbacks, the industry has promoted the use of precast foamed material separators to replace traditional asphalt grouting, achieving dry construction and improved efficiency. However, the existing separator structure design still suffers from insufficient compatibility with actual working conditions: First, due to the large thickness tolerances of extruded polystyrene boards or foamed substrates produced by different manufacturers, the existing separators lack an adaptive adjustment mechanism, resulting in a loose bond with the base layer. During concrete pouring and vibration, they are prone to floating and displacement, causing the separator joints to become skewed or even fail. Second, the surface cover strip and internal anchoring structure of the existing separators are mostly integrated or simply snap-fitted, lacking a repairable design for material aging. Once the cover strip becomes brittle or deformed due to ultraviolet radiation, it often requires the complete removal of the separator joint body for replacement, making repair difficult and costly. In addition, the existing snap-fit ​​structure is temperature sensitive. It hardens in the low temperatures of winter, making it difficult to install and snap in, and softens in the high temperatures of summer, causing the snap-fit ​​to loosen, making it impossible to maintain a stable connection under all weather conditions.

[0004] Therefore, the applicant proposes a waterproof layer protection concrete expansion joint structure and construction method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a waterproof layer protection concrete expansion joint structure and construction method to solve the problems in the prior art where, although precast foamed material expansion strips have replaced asphalt grouting, the existing structure still has defects: the expansion joint lines float up during concrete pouring due to the uneven thickness of the foamed extruded board; the cover strip is difficult to replace individually after aging; and the material is affected by temperature, hardening in winter and becoming soft and loose in summer, making it impossible to guarantee a stable connection.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a waterproof layer protection concrete expansion joint structure, comprising a base, an expansion body inserted into the inner cavity of the base, an installation mechanism provided on the top of the expansion body, the installation mechanism comprising a docking seat, barb grooves respectively formed on the inner walls of both sides of the docking seat, a cover strip mechanism provided above the docking seat, the cover strip mechanism comprising a cover strip body, mounting hooks fixedly connected to both sides of the lower surface of the cover strip body, one side of the mounting hook engaging with the inner cavity of the corresponding barb groove, a plurality of plastic nails I provided on both sides of the base, one end of the plastic nail I passing through the corresponding side wall of the base and inserting into one side of the expansion body, a plurality of plastic nails II provided in the inner cavity of the docking seat, one end of the plastic nail II passing through the bottom of the docking seat and inserting into the top of the expansion body.

[0007] A construction method for a waterproof layer protecting a concrete expansion joint structure includes the following steps:

[0008] S1. After the roof waterproofing layer is completed and passes inspection, the expansion joints shall be marked out, and the area of ​​a single section shall not exceed 6m×6m.

[0009] S2. Lay the base along the marked line and use adhesive material to bond and fix the base to the surface of the waterproof layer.

[0010] S3. Insert the partition body vertically into the inner cavity of the base. Several plastic nails are provided on both sides of the base. One end of the plastic nail passes through the side wall of the base and is inserted into one side of the partition body.

[0011] S4. A docking seat is provided on the top of the partition body. The inner cavity of the docking seat is provided with several plastic nails. One end of the plastic nail passes through the bottom of the docking seat and is inserted into the top of the partition body.

[0012] S5. A cover strip body is provided above the docking seat. The lower surface of the cover strip body is fixedly connected to both sides with mounting hooks. One side of the mounting hook is engaged in the barb groove opened on the inner wall of both sides of the docking seat.

[0013] S6. Inject filling material into the reserved space on both sides of the partition body. The height of the filling material covers the bottom of the cover strip body, and the upper surface of the cover strip body is exposed above the filling material.

[0014] S7. After the filling material reaches the design strength, remove the surrounding temporary protective facilities.

[0015] A construction method for a waterproof layer protecting a concrete expansion joint structure, characterized in that the base is made of foamed material and the bonding material is concrete mortar.

[0016] Furthermore, the separator body is made of rigid plastic or foam material, and the depth to which the separator body is inserted into the inner cavity of the base is not less than 2 / 3 of the height of the base.

[0017] Furthermore, the mounting hook and the barb groove are either an interference fit or a zero clearance fit.

[0018] Furthermore, when replacing the cover strip body, cut along the joint between the cover strip body and the filler material to separate the old cover strip body and its mounting hook; after cleaning the top of the docking seat, insert the mounting hook of the new cover strip body into the barb groove, and inject sealant or adhesive between the new cover strip body and the original filler on both sides.

[0019] Furthermore, the filling material is fine stone concrete or hot melt asphalt; the aggregate particle size of the fine stone concrete is no greater than 10mm; the hot melt asphalt is heated to a molten state and then poured in two stages.

[0020] Furthermore, a protective film is provided on the surface of the cover strip body.

[0021] Furthermore, the length of the base is consistent with the length of the cable, or it is spliced ​​using standard fixed-length modules, with a gap at the splice not exceeding 2mm.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] This technical solution achieves reliable lateral constraint by deeply inserting the partition body and the base, supplemented by a plastic nail penetrating the side wall of the base and the partition body. This effectively suppresses the possible floating or displacement of the partition body during concrete pouring and vibration, ensuring accurate positioning and straight lines of the partition joint. The top-mounted docking seat is fixed to the top of the partition body by a second plastic nail, improving the overall connection strength and shear resistance. The cover strip body achieves mechanical engagement with the barbed groove on the inner wall of the docking seat via its lower mounting hook, forming a detachable structure. This facilitates individual replacement of the cover strip body when it ages or breaks, without disturbing the partition body and surrounding filling layer, significantly reducing maintenance costs. The mounting hook and barbed groove use an interference or zero-clearance fit, and the bottom of the cover strip is wrapped with filling material to maintain connection stability, adapt to changes in high and low temperature environments, and prevent loosening due to thermal expansion and contraction. The base supports fixed-length modular assembly, combined with standardized operating procedures, improving construction efficiency, reducing the skill requirements for operators, and facilitating large-scale project implementation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the partition body structure provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the docking seat structure provided in an embodiment of the present invention;

[0028] Figure 4 This is a flowchart provided for an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Base; 2. Divider body; 3. Plastic nail one; 4. Mounting mechanism; 401. Connecting seat; 402. Barbed groove; 5. Cover strip mechanism; 501. Cover strip body; 502. Mounting hook; 6. Plastic nail two. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] As attached Figure 1 To be continued Figure 4 As shown:

[0033] Example 1:

[0034] This invention provides a waterproof layer protection concrete expansion joint structure, including a base 1, a partition body 2 inserted into the inner cavity of the base 1, an installation mechanism 4 on the top of the partition body 2, the installation mechanism 4 including a docking seat 401, barb grooves 402 respectively opened on the inner walls of both sides of the docking seat 401, a cover strip mechanism 5 above the docking seat 401, the cover strip mechanism 5 including a cover strip body 501, and installation hooks 502 fixedly connected to both sides of the lower surface of the cover strip body 501. One side of the installation hook 502 is engaged with the inner cavity of the corresponding barb groove 402. Several plastic nails 3 are respectively provided on both sides of the base 1. One end of the plastic nail 3 passes through the corresponding side wall of the base 1 and is inserted into one side of the partition body 2. Several plastic nails 6 are provided in the inner cavity of the docking seat 401. One end of the plastic nail 6 passes through the bottom of the docking seat 401 and is inserted into the top of the partition body 2.

[0035] A construction method for a waterproof layer protecting a concrete expansion joint structure includes the following steps:

[0036] S1. After the roof waterproofing layer is completed and passes inspection, the expansion joints shall be marked out, and the area of ​​a single section shall not exceed 6m×6m.

[0037] S2. Lay base 1 along the marked line and use adhesive material to bond and fix base 1 to the surface of the waterproof layer.

[0038] S3. Insert the separator body 2 vertically into the inner cavity of the base 1. Several plastic nails 3 are provided on both sides of the base 1. One end of the plastic nail 3 passes through the side wall of the base 1 and is inserted into one side of the separator body 2.

[0039] S4. A docking seat 401 is provided on the top of the partition body 2. The inner cavity of the docking seat 401 is provided with several plastic nails 6. One end of the plastic nails 6 passes through the bottom of the docking seat 401 and is inserted into the top of the partition body 2.

[0040] S5. A cover strip body 501 is provided above the docking seat 401. Both sides of the lower surface of the cover strip body 501 are fixedly connected with mounting hooks 502. One side of the mounting hook 502 is engaged in the barbed groove 402 opened on the inner wall of both sides of the docking seat 401.

[0041] S6. Fill the reserved space on both sides of the partition body 2 with filling material. The height of the filling material covers the bottom of the cover strip body 501, and the upper surface of the cover strip body 501 is exposed above the filling material.

[0042] S7. After the filling material reaches the design strength, remove the surrounding temporary protective facilities.

[0043] 3. A construction method for a waterproof layer protective concrete expansion joint structure according to claim 2, characterized in that the base 1 is made of foamed material and the bonding material is concrete mortar.

[0044] The separator 2 is made of rigid plastic or foam material, and the depth to which the separator 2 is inserted into the inner cavity of the base 1 is not less than 2 / 3 of the height of the base 1.

[0045] The mounting hook 502 and the barb groove 402 are either interference fit or zero clearance fit.

[0046] When replacing the cover strip body 501, cut along the joint between the cover strip body 501 and the filler material to separate the old cover strip body 501 and its mounting hook 502; after cleaning the top of the docking seat 401, insert the mounting hook 502 of the new cover strip body 501 into the barbed groove 402, and inject sealant or adhesive between the new cover strip body 501 and the original filler on both sides.

[0047] The filling material is fine aggregate concrete or hot melt asphalt; the aggregate particle size of fine aggregate concrete is no more than 10mm; the hot melt asphalt is heated to a molten state and then poured in two stages.

[0048] The cover strip body 501 has a protective film on its surface.

[0049] The length of base 1 is the same as the length of the cable, or standard fixed-length modules are spliced ​​together, and the gap at the splice is no more than 2mm.

[0050] Working principle: After the roof waterproofing layer is completed and passes inspection, precise marking of the expansion joints is performed to determine the specific location of the grid, ensuring that the area of ​​each individual grid is controlled within 6m × 6m. Then, a base 1 made of foam material is laid along the marked line, and concrete mortar is used as an adhesive to firmly bond the base 1 to the waterproofing layer surface. The length of the base 1 can be customized according to the marked line length or by splicing standard fixed-length modules, with strict control over the gap at the splice joints to be no greater than 2mm. After the base 1 is completely fixed, the expansion joint 2, made of rigid plastic or foam material, is vertically inserted into the inner cavity of the base 1, and the expansion joint 2 is secured by plastic nails 3 on both sides of the base 1. First, the horizontal limit is set, while ensuring that the insertion depth of the partition body 2 is not less than 2 / 3 of the height of the base 1; then, the docking seat 401 is installed on the top of the partition body 2, and plastic nails 6 are inserted from the bottom of the docking seat 401 into the top of the partition body 2 to form a vertical positioning and overall connection; then, the cover strip body 501 is pressed down, so that the mounting hooks 502 on both sides are engaged in the barbed grooves 402 on the inner wall of the docking seat 401, completing the top cover assembly; then, filling material is injected into the reserved space on both sides of the partition body 2, and the filling height covers the bottom of the cover strip body 501, while the upper surface of the cover strip body 501 is left exposed for later maintenance; after the filling material hardens to the design strength, the temporary protection is removed to complete the construction;

[0051] This solution effectively prevents the partition body 2 from floating or shifting during concrete pouring or vibration by using a deep insertion structure between the base 1 and the partition body 2, along with the lateral insertion of plastic nail 3. This ensures precise positioning and straight lines of the partition joint. The installation of the docking seat 401 and plastic nail 6 further enhances the overall integrity and shear resistance of the top connection. The cover strip body 501 is mechanically snapped together with the installation hook 502 and the barbed groove 402, achieving a detachable design. When the cover strip ages and is damaged, it can be quickly replaced without damaging the main structure, reducing later maintenance costs. The installation hook 502 and the barbed groove 402 use an interference or zero clearance fit, combined with the wrapping effect of the filling material on the bottom of the cover strip, so that the connection structure can remain stable in high and low temperature environments, avoiding loosening or failure due to thermal expansion and contraction of materials. The base 1 adopts modular splicing and standardized construction process, which improves on-site installation efficiency, reduces reliance on workers' operating experience, and is conducive to large-scale promotion and application.

[0052] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A waterproof layer protection concrete expansion joint structure, comprising a base (1), characterized in that, The inner cavity of the base (1) is fitted with a partition body (2). The top of the partition body (2) is provided with an installation mechanism (4). The installation mechanism (4) includes a docking seat (401). The inner walls on both sides of the docking seat (401) are respectively provided with barb grooves (402). A cover strip mechanism (5) is provided above the docking seat (401). The cover strip mechanism (5) includes a cover strip body (501). The lower surface of the cover strip body (501) is fixedly connected to both sides with mounting brackets. The mounting hook (502) is engaged with the inner cavity of the corresponding barb groove (402) on one side. Several plastic nails (3) are provided on both sides of the base (1). One end of the plastic nail (3) passes through the side wall of the corresponding base (1) and is inserted into one side of the partition body (2). Several plastic nails (6) are provided in the inner cavity of the docking seat (401). One end of the plastic nail (6) passes through the bottom of the docking seat (401) and is inserted into the top of the partition body (2).

2. The construction method of a waterproof layer protection concrete expansion joint structure according to claim 1, characterized in that, Includes the following steps: S1. After the roof waterproofing layer is completed and passes inspection, the expansion joints shall be marked out, and the area of ​​a single section shall not exceed 6m×6m. S2. Lay the base (1) along the layout line and use adhesive material to bond and fix the base (1) to the surface of the waterproof layer; S3. Insert the partition body (2) vertically into the inner cavity of the base (1). Several plastic nails (3) are provided on both sides of the base (1). One end of the plastic nail (3) passes through the side wall of the base (1) and is inserted into one side of the partition body (2). S4. A docking seat (401) is provided on the top of the partition body (2). The inner cavity of the docking seat (401) is provided with several plastic nails (6). One end of the plastic nails (6) passes through the bottom of the docking seat (401) and is inserted into the top of the partition body (2). S5. A cover strip body (501) is provided above the docking seat (401). The lower surface of the cover strip body (501) is fixedly connected with two sides of the mounting hook (502). One side of the mounting hook (502) is engaged in the barb groove (402) opened on the inner wall of both sides of the docking seat (401). S6. Fill the reserved space on both sides of the partition body (2) with filling material. The height of the filling material covers the bottom of the cover strip body (501), and the upper surface of the cover strip body (501) is exposed above the filling material. S7. After the filling material reaches the design strength, remove the surrounding temporary protective facilities.

3. The construction method of a waterproof layer protection concrete expansion joint structure according to claim 2, characterized in that, The base (1) is made of foamed material and the bonding material is concrete mortar.

4. The construction method of a waterproof layer protection concrete expansion joint structure according to claim 2, characterized in that, The separator body (2) is made of rigid plastic or foam material, and the depth of the separator body (2) inserted into the inner cavity of the base (1) is not less than 2 / 3 of the height of the base (1).

5. The construction method of a waterproof layer protection concrete expansion joint structure according to claim 2, characterized in that, The mounting hook (502) and the barb groove (402) are either an interference fit or a zero clearance fit.

6. The construction method of a waterproof layer protection concrete expansion joint structure according to claim 2, characterized in that, When replacing the cover strip body (501), cut along the joint between the cover strip body (501) and the filling material to separate the old cover strip body (501) and its mounting hook (502); after cleaning the top of the docking seat (401), insert the mounting hook (502) of the new cover strip body (501) into the barb groove (402), and inject sealant or adhesive between the new cover strip body (501) and the original filling material on both sides.

7. The construction method of a waterproof layer protection concrete expansion joint structure according to claim 2, characterized in that, The filling material is fine stone concrete or hot melt asphalt; the aggregate particle size of fine stone concrete is no greater than 10mm; the hot melt asphalt is heated to a molten state and then poured in two stages.

8. The construction method of a waterproof layer protection concrete expansion joint structure according to claim 2, characterized in that, The cover strip body (501) has a protective film on its surface.

9. A construction method for a waterproof layer protecting concrete expansion joint structure according to claim 2, characterized in that, The length of the base (1) is the same as the length of the line, or it can be spliced ​​with standard fixed-length modules, and the gap at the splice is no more than 2mm.

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