Waterproof structure for roof deformation joint
The modular design of detachable columns and covers solves the problems of construction difficulty and maintenance difficulties in roof expansion joint waterproofing structures, improves waterproofing effect and building flexibility, and ensures building stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG CONSTR ENG GRP CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-06-09
AI Technical Summary
Existing waterproof structures for roof expansion joints are difficult to construct, maintain, and are not flexible enough. They are unable to cope with deformation caused by thermal expansion and contraction and settlement, and are prone to leakage.
The design incorporates detachable columns and cover plates, along with modular installation and support structures, allowing for flexible roof deformation and enabling maintenance through partial disassembly and replacement of components, thereby enhancing waterproofing.
It enables convenient repair and maintenance, improves the flexibility and waterproofing effect of the waterproof structure, and ensures the stability of the building structure.
Smart Images

Figure CN224338429U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of building construction, and in particular to a waterproof structure for roof expansion joints. Background Technology
[0002] In the construction industry, to prevent floor expansion and deformation caused by weather factors such as temperature and humidity, expansion joints are usually installed. These joints are mostly vertical expansion joints, which can ensure that buildings, especially high-rise buildings, have a certain amount of room to expand and contract freely in the event of temperature changes, uneven foundation settlement, or earthquakes.
[0003] To address the waterproofing issue of roof expansion joints, common practices include various methods such as top steel plate cover, precast concrete cover, and cantilever cover. Among these, the cantilever cover method is the most practical and structurally the most stable. For example, utility model patent application number CN200820087828.5 discloses a waterproofing structure for roof expansion joints, including walls on both sides of the expansion joint. One of the walls has a horizontally cantilevered slab at its top. The wall and the cantilevered slab are integrally cast structures, and the cantilevered slab extends to completely cover the top of the other wall. A waterproof filler is placed between the top of the other wall and the cantilevered slab.
[0004] However, the above-mentioned waterproof structure still has the following shortcomings: 1. The above-mentioned waterproof structure is integrally cast with the cantilever slab and the wall, which has the defects of being difficult to construct and difficult to disassemble. Once the waterproof filler ages or is damaged, the original structure must be destroyed during repair, which has the problems of difficult repair and high cost; 2. The integral rigid structure lacks flexibility and is difficult to cope with deformation caused by factors such as thermal expansion and contraction and settlement, which easily leads to waterproof failure and leakage. Utility Model Content
[0005] To address the problems existing in the prior art, this utility model provides a waterproof structure for roof expansion joints. Through detachable columns and covers, it enables partial replacement of parts during maintenance. Furthermore, the modular installation allows for flexible deformation when the roof undergoes lateral and longitudinal displacement due to thermal expansion and contraction or settlement, thereby improving the waterproofing effect.
[0006] The technical solution of this utility model is to provide a waterproof structure for roof expansion joints, wherein the roof expansion joint is located between a first wall and a second wall of the roof. The structure is characterized by including a vertically mounted column on the first wall, the column being detachably fixed to the first wall; and a cover plate located above the roof expansion joint, the cover plate including a first panel and a second panel connected to each other, the first panel being detachably fixed to the column, and the second panel being detachably fixed to the second wall.
[0007] Furthermore, the waterproof structure for roof expansion joints provided by this utility model may also have the following features: it further includes a horizontally arranged crossbeam, which is detachably fixed to the column; the first panel extends to the bottom of the crossbeam and is detachably fixed to the crossbeam.
[0008] Furthermore, the waterproof structure for roof expansion joints provided by this utility model may also have the following features: the cross-section of the cover plate is L-shaped, and the two parts of the L-shape respectively form the first panel and the second panel; the first panel is provided with an inclined surface for guiding drainage, and the inclined surface is inclined downward in a direction away from the column.
[0009] Furthermore, the waterproof structure for roof expansion joints provided by this utility model may also have the following features: the cover plate and the column are connected by a support structure, the support structure including a first support part for supporting the cover plate and a horizontal second support part for supporting the first support part; the cross-section of the first support part is L-shaped, and its bending angle is the same as that of the cover plate; one end of the first support part is connected to the column, and the other end is connected to the second support part; the first support part is connected to the cover plate through at least one connecting structure; the second support part is connected to the column.
[0010] Furthermore, the waterproof structure for roof expansion joints provided by this utility model may also have the following features: the connecting structure includes a right-angle bracket; the first support part is detachably fixed to one right-angle side of the right-angle bracket, and the cover plate is detachably fixed to the other right-angle side of the right-angle bracket.
[0011] Furthermore, the waterproof structure for roof expansion joints provided by this utility model may also have the following feature: the connecting structure further includes a gasket for dispersing stress, disposed between the first support and the right-angle bracket.
[0012] Furthermore, the waterproof structure for roof expansion joints provided by this utility model may also have the following features: the second panel is connected to the second wall through a waterproof structure, the waterproof structure including a waterproof strip and a metal plate covering the waterproof strip, one end of the metal plate being detachably fixed to the second panel by bolts, and the other end being glued to the second wall through the waterproof strip.
[0013] Furthermore, the waterproof structure for roof expansion joints provided by this utility model may also have the following feature: there is a gap between the second panel and the second wall, and the waterproof structure further includes a sealing element disposed in the gap.
[0014] Furthermore, the waterproof structure for roof expansion joints provided by this utility model may also have the following feature: it further includes an insulation part filled in the roof expansion joint.
[0015] Furthermore, the waterproof structure for roof expansion joints provided by this utility model may also have the following features: it further includes a waterproof strip disposed above the roof expansion joint and below the cover plate; one end of the waterproof strip extends to and fits against the first wall, and the other end extends to and fits against the second wall, so as to seal the roof expansion joint.
[0016] The beneficial effects of this utility model are as follows:
[0017] 1. In this application, the design of detachable columns and cover plates is adopted to realize modular installation. The waterproof structure can be maintained by partial disassembly and replacement of parts, which can effectively avoid structural damage, improve maintenance convenience, and allow flexible deformation of the roof when it undergoes lateral and longitudinal displacement due to thermal expansion and contraction or settlement, thereby improving the waterproof effect.
[0018] 2. In this application, a supporting structure is further designed to cooperate with the cover plate structure, so as to bear the weight of the cover plate and external loads while maintaining the flexibility of the structure of this application, and to ensure the structural stability of the entire building. Attached Figure Description
[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.
[0020] Figure 1 This is a first-view structural schematic diagram of the present invention;
[0021] Figure 2 This is a structural schematic diagram from a second perspective of the present invention;
[0022] Figure 3 for Figure 2 A magnified view of part A in the diagram;
[0023] Figure 4 for Figure 2 A magnified view of part B in the diagram.
[0024] In the picture:
[0025] 101. First wall; 102. Second wall; 103. Other roof structures; 104. Roof expansion joint; 2. Column; 3. Cover plate; 301. First panel; 302. Second panel; 303. Inclined surface; 4. Beam; 501. First support; 502. Second support; 601. Right angle bracket; 602. Gasket; 701. Waterproof strip; 702. Metal plate; 703. Elastic sealant; 704. Sealing element; 8. Insulation part; 9. Waterproof strip; 10. Support; 11. Embedded part; 12. Metal shell; 13. Insulating rock wool. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0027] This utility model provides a waterproof structure for roof expansion joint 104, the specific structure of which is as follows:
[0028] like Figure 1 As shown, the roof expansion joint 104 is located between the first wall 101 and the second wall 102 of the roof. The waterproofing structure for the roof expansion joint 104 includes a vertically mounted column 2 on the first wall 101, which is detachably fixed to the first wall 101. Specifically, an embedded part 11 is embedded in the first wall 101, and a support 10 welded to the embedded part 11 is installed on the first wall 101. The column 2 and the support 10 are detachably fixed to each other by at least one bolt. The support 10 is preferably hot-dip galvanized angle steel. The structure also includes a cover plate 3 located above the roof expansion joint 104. The cover plate 3 includes a first panel 301 and a second panel 302, which are integrally connected to form a continuous waterproof covering surface. The first panel 301 is detachably fixed to the column 2, and the second panel 302 is detachably fixed to the second wall 102. The cover plate 3 preferably has a thickness of not less than 3 mm. This application adopts a detachable column 2 and cover plate 3 design to achieve modular installation. The waterproof structure can be maintained by partial disassembly and replacement of parts, which can effectively avoid structural damage and improve maintenance convenience. In addition, it can allow flexible deformation to a certain extent when the roof undergoes lateral and longitudinal displacement due to thermal expansion and contraction or settlement, thereby improving the waterproof effect.
[0029] For different roof structures, the waterproofing structure also includes horizontally installed beams 4 for connecting with other roof structures 103. The beams 4 are detachably fixed to the columns 2. The first panel 301 extends below the beams 4 and is detachably fixed to them. The columns 2, beams 4, and cover plates 3 are preferably made of aluminum alloy, which is inexpensive and corrosion-resistant. Specifically, such as... Figure 2 and Figure 3 As shown, the beam 4 and the column 2 are detachably fixed by at least one bolt; the beam 4 is connected to other roof structures 103 by a fixing structure to ensure the integrity of the seal between the beam 4 and other roof structures 103; one end of the fixing structure is detachably fixed to other roof structures 103 by bolts, and the other end is detachably fixed to the beam 4 by bolts. The fixing structure includes a metal shell 12 formed of galvanized steel sheet and thermal insulation rock wool 13 filled inside the metal shell 12, which is preferably made of aluminum alloy.
[0030] like Figure 1 As shown, the cover plate 3 has an L-shaped cross section, and the two parts of the L-shape form a first panel 301 and a second panel 302 respectively. The first panel 301 is provided with an inclined surface 303 for guiding drainage, and the inclined surface 303 is inclined downward in the direction away from the column 2. The second panel 302 is arranged in the vertical direction, and its end is detachably fixed to the second wall 102.
[0031] like Figure 2 and Figure 3 As shown, the cover plate 3 and the column 2 are also connected by a support structure. The support structure includes a first support part 501 for supporting the cover plate 3 and a horizontal second support part 502 for supporting the first support part 501. The cross-section of the first support part 501 is L-shaped, and its bending angle is the same as that of the cover plate 3. One end of the first support part 501 is detachably fixed to the column 2 by at least one bolt, and the other end is connected to the second support part 502. Both the first support part 501 and the second support part 502 are hot-dip galvanized angle steel and are integrally formed by welding. The first support part 501 is connected to the cover plate 3 by at least one connecting structure. When there are multiple connecting structures, the multiple connecting structures are evenly spaced along the length direction of the first support part 501. The second support part 502 is detachably fixed to the column 2 by at least one bolt. The support structure bears the weight of the cover plate 3 and the external load, ensuring the structural stability of the entire building.
[0032] like Figure 3As shown, the connection structure includes a right-angle bracket 601, preferably an aluminum bracket; the first support portion 501 is detachably fixed to one right-angle side of the right-angle bracket 601, and the cover plate 3 is detachably fixed to the other right-angle side of the right-angle bracket 601. Specifically, the first support portion 501 is detachably fixed to one side of the right-angle bracket 601 by at least one bolt, and the cover plate 3 is detachably fixed to the other side of the right-angle bracket 601 by at least one bolt. Further, the connection structure also includes a gasket 602 disposed between the first support portion 501 and the right-angle bracket 601 for dispersing stress, preferably made of an insulating material.
[0033] like Figure 4 As shown, the second panel 302 is connected to the second wall 102 via a waterproof structure. This waterproof structure includes a waterproof strip 701 and a metal plate 702 covering the waterproof strip 701 to enhance its fire resistance. One end of the metal plate 702 is detachably bolted to the second panel 302, and the other end is bonded to the second wall 102 via the waterproof strip 701. The waterproof strip 701 is preferably an EPDM rubber strip, and the metal plate 702 is preferably an aluminum plate. Specifically, the metal plate 702, the waterproof strip 701, and the second panel 302 all have corresponding connection holes, and bolts are sequentially passed through these three holes to connect them. Furthermore, elastic sealant 703 is applied to the bolts and around the connection holes to wrap them and prevent rust and corrosion. Furthermore, after the second panel 302 and the second wall 102 are connected, there is still a gap between the second panel 302 and the second wall 102. The waterproof structure also includes a sealant 704 disposed in the gap. The sealant 704 is preferably a silicone weather-resistant sealant and a foam strip.
[0034] like Figure 2 As shown, the waterproof structure also includes an insulation part 8 filled in the roof expansion joint 104, and the insulation part 8 is preferably an insulation material such as mineral wool or polyurethane foam.
[0035] To further enhance waterproofing, such as Figure 2 As shown, the waterproof structure also includes a waterproof strip 9 located above the roof expansion joint 104 and below the cover plate 3; one end of the waterproof strip 9 extends to and fits against the first wall 101, and the other end extends to and fits against the second wall 102 to seal the roof expansion joint 104.
[0036] In the above embodiments, the bolts are preferably corrosion-resistant and high-strength stainless steel bolts.
[0037] The above-described contents can be implemented individually or in combination in various ways, and all such variations are within the protection scope of this utility model.
[0038] In the description of this invention, it should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.
[0039] In the description of this invention, it should also be noted that the terms "center," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In the description of this invention, unless otherwise stated, "a number" means two or more.
[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A waterproof structure for a roof deformation joint (104) provided between a first wall body (101) of a roof and a second wall body (102) of a roof, characterized by, It includes a column (2) vertically installed on the first wall (101), the column (2) being detachably fixed to the first wall (101); it also includes a cover plate (3) installed above the roof expansion joint (104), the cover plate (3) including a first panel (301) and a second panel (302) connected to each other, the first panel (301) being detachably fixed to the column (2), and the second panel (302) being detachably fixed to the second wall (102).
2. The waterproofing structure for a roof deformation joint (104) according to claim 1, characterized in that, It also includes a horizontally arranged crossbeam (4), which is detachably fixed to the column (2); the first panel (301) extends below the crossbeam (4) and is detachably fixed to the crossbeam (4).
3. The waterproof structure for a roof deformation joint (104) according to claim 1, characterized by, The cover plate (3) has an L-shaped cross section, and the two parts of the L-shape form the first panel (301) and the second panel (302) respectively; the first panel (301) is provided with an inclined surface (303) for guiding drainage, and the inclined surface (303) is inclined downward in a direction away from the column (2).
4. The waterproofing structure for a roof deformation joint (104) according to claim 3, characterized in that, The cover plate (3) and the column (2) are also connected by a support structure, which includes a first support part (501) for supporting the cover plate (3) and a horizontal second support part (502) for supporting the first support part (501); the cross-section of the first support part (501) is L-shaped and its bending angle is the same as that of the cover plate (3); one end of the first support part (501) is connected to the column (2) and the other end is connected to the second support part (502); the first support part (501) is connected to the cover plate (3) through at least one connecting structure; the second support part (502) is connected to the column (2).
5. The waterproofing structure for a roof deformation joint (104) according to claim 4, characterized in that, The connection structure includes a right-angle bracket (601); the first support part (501) is detachably fixed to one right-angle side of the right-angle bracket (601), and the cover plate (3) is detachably fixed to the other right-angle side of the right-angle bracket (601).
6. The waterproof structure for a roof deformation joint (104) according to claim 4, characterized by, The connection structure also includes a gasket (602) for dispersing stress, disposed between the first support (501) and the right angle bracket (601).
7. The waterproof structure for a roof deformation joint (104) according to claim 1, characterized by, The second panel (302) is connected to the second wall (102) through a waterproof structure. The waterproof structure includes a waterproof strip (701) and a metal plate (702) covering the waterproof strip (701). One end of the metal plate (702) is detachably fixed to the second panel (302) by bolts, and the other end is glued to the second wall (102) through the waterproof strip (701).
8. The waterproofing structure for a roof deformation joint (104) according to claim 7, characterized in that, There is a gap between the second panel (302) and the second wall (102), and the waterproof structure also includes a seal (704) disposed in the gap.
9. The waterproof structure for a roof deformation joint (104) according to claim 1, characterized by, It also includes the insulation (8) that fills the roof expansion joint (104).
10. The waterproof structure for a roof deformation joint (104) according to claim 1, characterized by, The waterproof belt (9) is arranged above the roof deformation joint (104) and below the cover plate (3), one end of the waterproof belt (9) extends to the first wall (101) and is attached to the first wall (101), and the other end of the waterproof belt (9) extends to the second wall (102) and is attached to the second wall (102), so as to seal the roof deformation joint (104).