A deformation joint structure combining waterproof and drainage and a construction method thereof
By incorporating upper left and upper right flaps and folded plate structures within the expansion joint, combined with upper and lower sealing structures, the problems of leakage, aesthetics, and high maintenance costs associated with traditional expansion joint structures are solved, achieving superior waterproofing performance and aesthetics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FUTURE LAND HLDG REAL ESTATE DEV CO LTD
- Filing Date
- 2023-09-26
- Publication Date
- 2026-07-10
AI Technical Summary
Traditional expansion joint structures that combine drainage and waterproofing suffer from problems such as material aging leading to leakage and water loss, affecting aesthetics, limiting deformation, and high maintenance costs.
The structure employs a left-upper flap, a right-upper flap, and a folded plate, combined with an upper and lower sealing structure. It incorporates a flow guide channel and waterproof sealant to form a bent expansion joint, enhancing waterproofing capabilities. A protective plate is installed inside the expansion joint to conceal the structure, thereby improving the expansion joint's capacity to accommodate expansion and contraction and its aesthetic appeal.
It improves the waterproof performance of expansion joints, extends the service life of sealing structures, enhances the expansion capacity of expansion joints, solves leakage and aesthetic problems, and reduces maintenance costs.
Smart Images
Figure CN117306721B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of building engineering technology, and specifically relates to a deformation joint structure that combines prevention and drainage and its construction method. Background Technology
[0002] Traditional expansion joint structures combining waterproofing and drainage are typically used to address the thermal expansion and contraction of building roofs caused by factors such as temperature changes, structural deformation, or earthquakes. This type of expansion joint structure generally includes the following main components: Roof joint: A roof joint is a straight or curved crack in the building's roof surface, used to accommodate roof expansion and contraction. It can be an open or closed gap. Deformable material: To accommodate roof expansion and contraction, flexible deformable materials are often used to fill the roof joint. Common deformable materials include elastic materials such as rubber, polymers, and silicone, which have good elasticity and weather resistance. Waterproofing layer and protective layer: A waterproofing layer and a protective layer are usually installed above the expansion joint structure to ensure the roof's waterproofing performance and durability. The waterproofing layer can be made of waterproof membranes or coatings, while the protective layer can be a protective film, protective panel, or other materials.
[0003] However, traditional expansion joint structures that combine prevention and drainage also have some potential drawbacks.
[0004] 1. Safety risks: If deformable materials age or are damaged, it may lead to problems such as roof leaks and water damage, which may pose safety hazards to indoor equipment, decorations, etc., and increase the cost of repair and restoration.
[0005] 2. Affects the aesthetics of the structure: Traditional expansion joint structures may affect the appearance of the building and damage the overall aesthetics of the building. This is especially true in some high-end building projects, where a more concealed and elegant solution is needed.
[0006] 3. Deformation limitation: Traditional expansion joint structures have limited expansion range and capacity; under extreme temperature changes or earthquakes, when the deformation of the building exceeds the limit of the expansion joint, it can easily lead to deformation and damage of the expansion joint structure.
[0007] 4. High maintenance costs: Traditional expansion joint structures that combine waterproofing and drainage require regular inspection and maintenance to ensure the normal operation of the expansion joint materials and their waterproofing performance. This increases the maintenance costs and workload of the building.
[0008] Therefore, in the architectural structural design and construction process of this project, these shortcomings were comprehensively considered, and appropriate measures were taken to improve the performance and reliability of the expansion joint structure that combines prevention and drainage. Summary of the Invention
[0009] The purpose of this invention is to provide a combined anti-drainage and drainage expansion joint structure and its construction method, in order to solve the technical problems of traditional expansion joint structures, such as material aging or damage leading to roof leakage and water loss, affecting the aesthetics of the structure, limiting deformation, and high enclosure costs.
[0010] To achieve the above objectives, the present invention adopts the following technical solution.
[0011] An expansion joint structure combining prevention and drainage is installed in the expansion joint between adjacent building floor slabs; it includes a left upper flap, a right upper flap, an upper sealing structure, and a lower sealing structure; the left upper flap is longitudinally installed on the floor slab to the left of the expansion joint, and its right side is vertically aligned with the left side wall of the expansion joint; a slot is longitudinally installed at the bottom of the left upper flap, facing the expansion joint; limit rods are spaced longitudinally in the slot; the right upper flap is longitudinally installed on the floor slab to the right of the expansion joint, and its left side is vertically aligned with the right side wall of the expansion joint; the upper end of the right upper flap extends beyond the upper end of the left upper flap, and a folded plate is installed on the left side of the extended portion; the folded plate is located above the expansion joint and the left upper flap, and its top surface is a slope that gradually slopes downward from the root to the end; the upper sealing structure includes an upper sealing plate and an upper sealing strip; the upper sealing plate is a horizontal U-shape, longitudinally installed on top of the left upper flap. The upper sealing strip fills the gap between the upper sealing plate and the folding plate, with the U-shaped groove of the upper sealing plate facing to the left. The lower sealing structure includes a lower sealing strip and a cover plate. The lower sealing strip is longitudinally arranged at the bottom of the expansion joint. The cover plate covers the bottom of the expansion joint, and the left and right sides of the cover plate are fixed to the structures on both sides of the expansion joint. A guide groove is provided inside the expansion joint at the position corresponding to the slot. The guide groove is strip-shaped and runs along the expansion joint. The guide channel is installed along its entire length within the expansion joint; the cross-section of the guide channel is U-shaped, and the left end of the guide channel is bent outward horizontally to form a folded edge; the folded edge is inserted into the slot, and a horizontal strip hole is provided on the folded edge at the position corresponding to the limiting rod; the horizontal strip hole of the folded edge is fitted onto the limiting rod and is laterally adjustable to the limiting rod; the right end of the guide channel is connected to the right side wall of the expansion joint by a fastener; waterproof sealant is provided at the joint between the right end of the guide channel and the right side wall of the expansion joint.
[0012] Preferably, the width of the expansion joint is 80mm to 120mm.
[0013] Preferably, a side beam is provided at the bottom of the floor slab on both sides of the expansion joint, along the length of the side corresponding to the expansion joint; the width of the side beam is not less than 300mm.
[0014] Preferably, the distance between the folding plate and the upper left flap is adapted to the width of the expansion joint, which is 80mm~120mm; the slope of the top surface of the folding plate is 1%~2%.
[0015] Preferably, the height of the upper left flap is no more than 600mm; the width of the folding plate is no less than 400mm, and the end of the folding plate extends beyond the right side of the upper left flap.
[0016] Preferably, the top of the floor slabs on both sides of the expansion joint is provided with, from bottom to top, a bottom waterproof layer, a mortar bonding layer, a top waterproof layer, a first insulation layer, and a first leveling layer; the upper ends of the bottom waterproof layer and the top waterproof layer on the left side of the expansion joint extend to the top of the upper left flap; the upper sealing plate is pressed onto the upper ends of the bottom waterproof layer and the top waterproof layer on the left side of the expansion joint; the upper ends of the bottom waterproof layer and the top waterproof layer on the right side of the expansion joint extend to the right side of the upper right flap, and the upper ends of the bottom waterproof layer and the top waterproof layer on the right side of the expansion joint pass through... The first fixing nail is fixed to the upper right flap; a second insulation layer is provided between the bottom waterproof layer on the right side of the expansion joint and the upper right flap; a sealing layer is provided on top of the second insulation layer; a third insulation layer is provided on the top surface of the upper right flap and the right side above the second insulation layer; a protective plate is provided on the outside of the third insulation layer; the lower end of the protective plate overlaps the upper outer side of the top waterproof layer on the corresponding side, and the upper end of the protective plate blocks the outside of the joint between the upper sealing plate and the folded plate; a finishing mortar layer is provided on the outside of the third insulation layer.
[0017] Preferably, a sealing strip is provided at the joint between the end of the first leveling layer near the expansion joint and the top waterproof layer.
[0018] A construction method for a combined expansion joint structure that combines prevention and drainage includes the following steps.
[0019] Step 1: Install a right-upper flap at the top of the floor slab on the right side of the expansion joint; when constructing the right-upper flap, make the upper end of the right-upper flap extend beyond the upper end of the left-upper flap, and install a folded plate on the left side of the extended part.
[0020] Step 2: Pre-embed limit rods longitudinally at intervals on the top of the floor slab on the left side of the expansion joint, near the right edge; then install the guide channel, so that the horizontal strip holes of the folded edge are fitted onto the limit rods and are horizontally adjustable to the limit rods; connect the right end of the guide channel to the right side wall of the expansion joint with fasteners.
[0021] Step 3: Construct the upper left flap. When constructing the upper left flap, set a slot along the longitudinal length at the bottom of the upper left flap, on the side facing the expansion joint, and ensure that the limiting rod and the folded edge are located in the slot.
[0022] Step 4, Install the sealing structure: Set the upper sealing plate longitudinally in the gap between the top of the upper left flap and the folding plate, and fill the U-shaped groove of the upper sealing plate with sealing strips.
[0023] Step 5, Install the lower sealing structure: Set the lower sealing strip along the longitudinal length at the bottom of the expansion joint, and cover the bottom of the expansion joint with a cover plate, fixing the left and right sides of the cover plate to the structures on both sides of the expansion joint respectively. The construction is now complete.
[0024] Preferably, after the construction of the upper left flap in step three is completed, a second insulation layer is constructed at the root of the right side of the upper right flap; then, from bottom to top, a bottom waterproof layer, a mortar bonding layer, a top waterproof layer, a first insulation layer, and a first leveling layer are constructed on the top of the floor slab on both sides of the expansion joint; a sealing layer is provided on the top of the second insulation layer on the right side of the expansion joint; a third insulation layer is then provided on the top surface of the upper right flap and on the right side above the second insulation layer, and a finishing mortar layer is provided on the outside of the third insulation layer; finally, a protective board is covered on the outside of the third insulation layer.
[0025] Compared with the prior art, the present invention has the following features and beneficial effects.
[0026] 1. The expansion joint structure combining waterproofing and drainage of the present invention has a left upper flap and a right upper flap on the left and right sides of the expansion joint, and a folding plate on the top of the right upper flap. This structure makes the entire expansion joint form a bent shape, which improves the waterproofing ability of the expansion joint. At the same time, the inventors of this application place the upper sealing structure and the lower sealing structure in the gap between the folding plate and the left upper flap and at the bottom of the expansion joint, respectively. In this structure, the folding plate provides protection for the upper sealing structure, preventing the upper sealing structure from being directly exposed to sun and rain, and extending the service life of the upper sealing structure.
[0027] 2. The present invention provides a slot along the bottom of the upper left flap, facing the expansion joint, and a guide channel is provided in the expansion joint at the position corresponding to the slot, with the folded edge of the guide channel correspondingly inserted into the slot; in this structure, the guide channel holds the upper opening of the joint and guides the held water out, and the guide channel and the slot are movably connected, which solves the problem of deformation of the expansion joint damaging the guide channel.
[0028] 3. In this invention, the upper sealing plate is made of a U-shaped thin plate and the bottom cover plate is made of a bent thin plate. This sealing structure can have a large deformation space when the expansion joint undergoes expansion and contraction, which solves the technical problem that traditional expansion joint structures are prone to deformation and damage when the deformation of the building exceeds the limit of the expansion joint.
[0029] 4. The present invention covers the outside of the third insulation layer with a protective plate, and the lower end of the protective plate overlaps the upper outer end of the top waterproof layer on the corresponding side. The upper end of the protective plate blocks the outside of the joint between the upper sealing plate and the folded plate. The structure of the protective plate, the upper left folding plate, the upper right folding plate and the folded plate makes the expansion joint hidden in the structure, which solves the technical problem that the expansion joint structure is exposed on the building surface, which may affect the appearance of the building and destroy the overall aesthetics of the building. Attached Figure Description
[0030] The present invention will now be described in further detail with reference to the accompanying drawings.
[0031] Figure 1 This is a schematic diagram of the expansion joint structure combining anti-drainage and drainage according to the present invention.
[0032] Figure 2 This is a structural schematic diagram of the floor slab on the right side of the expansion joint and the upper right flap in this invention.
[0033] Figure 3 This is a schematic diagram of the structure of the floor slab on the left side of the expansion joint and the upper left flap in this invention.
[0034] Figure 4 This is a schematic diagram of the flow guide groove in this invention.
[0035] Attached diagram labels: 1 - Floor slab, 2 - Upper left flap, 3 - Upper right flap, 4 - Expansion joint, 5 - Third insulation layer, 6 - Slot, 7 - Folded plate, 8 - Upper sealing plate, 9 - Upper sealing strip, 10 - Lower sealing strip, 11 - Cover plate, 12 - Guide channel, 13 - Folded edge, 14 - Bottom waterproof layer, 15 - Mortar bonding layer, 16 - Top waterproof layer, 17 - First insulation layer, 18 - First leveling layer, 19 - Edge beam, 20 - First fixing nail, 21 - Second insulation layer, 22 - Sealing layer, 23 - Second fixing nail, 24 - Protective plate, 25 - Finishing mortar layer, 26 - Limiting rod, 27 - Horizontal strip hole, 28 - Waterproof sealant, 29 - Sealing strip. Detailed Implementation
[0036] like Figure 1-4As shown, this expansion joint structure combining prevention and drainage is installed in the expansion joint 4 between adjacent building floor slabs 1; it includes a left upper flap 2, a right upper flap 3, an upper sealing structure, and a lower sealing structure; the left upper flap 2 is installed longitudinally on the floor slab 1 to the left of the expansion joint 4, and the right side of the left upper flap 2 is vertically aligned with the left side wall of the expansion joint 4; a slot 6 is installed longitudinally on the bottom of the left upper flap 2, facing the expansion joint 4; limit rods 26 are installed longitudinally at intervals in the slot 6; the right upper flap 3 is installed longitudinally on the expansion joint... On the right side of the floor slab 1, the left side of the upper right flap 3 is vertically aligned with the right side wall of the expansion joint 4; the upper end of the upper right flap 3 extends beyond the upper end of the upper left flap 2, and a folding plate 7 is provided on the left side of the extended portion; the folding plate 7 is located above the expansion joint 4 and the upper left flap 2, and the top surface of the folding plate 7 is a slope that gradually slopes downward from the root to the end; the upper sealing structure includes an upper sealing plate 8 and an upper sealing strip 9; the upper sealing plate 8 is a horizontal U-shape, which is longitudinally arranged in the gap between the top of the upper left flap 2 and the folding plate 7, and the upper sealing plate The U-shaped groove of the upper sealing plate 8 faces to the left; the upper sealing strip 9 fills the U-shaped groove of the upper sealing plate 8; the lower sealing structure includes a lower sealing strip 10 and a cover plate 11; the lower sealing strip 10 is longitudinally arranged at the lower part of the expansion joint 4; the cover plate 11 covers the bottom of the expansion joint 4, and the left and right sides of the cover plate 11 are respectively fixed to the structures on both sides of the expansion joint 4; a guide groove 12 is provided in the expansion joint 4 at the position corresponding to the slot 6; the guide groove 12 is strip-shaped and is longitudinally arranged in the expansion joint 4; the guide groove 12 is strip-shaped and is longitudinally arranged in the expansion joint 4; the guide groove 1 The cross-section of the guide channel 12 is U-shaped, and the left end of the guide channel 12 is bent outward horizontally to form a folded edge 13. The folded edge 13 is inserted into the slot 6, and a horizontal strip hole 27 is provided on the folded edge 13 at the position corresponding to the limiting rod 26. The horizontal strip hole 27 of the folded edge 13 is fitted onto the limiting rod 26 and is laterally adjustable to the limiting rod 26. The right end of the guide channel 12 is connected to the right side wall of the expansion joint 4 by a fastener. Waterproof sealant 28 is provided at the joint between the right end of the guide channel 12 and the right side wall of the expansion joint 4. The fastener here is a screw or a steel nail.
[0037] In this embodiment, the width of the expansion joint 4 is 80mm~120mm.
[0038] In this embodiment, a side beam 19 is provided at the bottom of the floor slab on both sides of the expansion joint 4, along the side edge corresponding to the expansion joint 4; the width of the side beam 19 is not less than 300mm.
[0039] In this embodiment, the distance between the folding plate 7 and the upper left flap 2 is adapted to the width of the deformation joint 4, which is 80mm~120mm; the slope of the top surface of the folding plate 7 is 1%~2%.
[0040] In this embodiment, the height of the upper left flap 2 is no more than 600mm; the width of the folding plate 7 is no less than 400mm, and the end of the folding plate 7 extends beyond the right side of the upper left flap 2.
[0041] In this embodiment, the top of the floor slabs 1 on both sides of the expansion joint 4 is provided with a bottom waterproof layer 14, a mortar bonding layer 15, a top waterproof layer 16, a first insulation layer 17, and a first leveling layer 18 in sequence from bottom to top; the upper ends of the bottom waterproof layer 14 and the top waterproof layer 16 on the left side of the expansion joint 4 extend to the top of the upper left flap 2; the upper sealing plate 8 is pressed onto the upper ends of the bottom waterproof layer 14 and the top waterproof layer 16 on the left side of the expansion joint 4; the upper ends of the bottom waterproof layer 14 and the top waterproof layer 16 on the right side of the expansion joint 4 extend to the right side of the upper right flap 3, and the bottom waterproof layer 14 and the top waterproof layer 16 on the right side of the expansion joint 4 extend to the right side of the upper right flap 3. The end is fixed to the upper right flap 3 by the first fixing nail 20; a second insulation layer 21 is provided between the bottom waterproof layer 14 on the right side of the expansion joint 4 and the upper right flap 3; a sealing layer 22 is provided on the top of the second insulation layer 21; a third insulation layer 5 is provided on the top surface of the upper right flap 3 and the right side above the second insulation layer 21; a protective plate 24 is provided on the outside of the third insulation layer 5; the lower end of the protective plate 24 overlaps the upper outer side of the top waterproof layer 16 on the corresponding side, and the upper end of the protective plate 24 blocks the outside of the joint between the upper sealing plate 8 and the folding plate 7; a finishing mortar layer 25 is provided on the outside of the third insulation layer 5. The upper sealing plate 8 and the cover plate 11 are made of thin steel plate or thin aluminum alloy plate, and the protective plate 24 is made of aluminum alloy plate; the protective plate 24 is fixed to the upper right flap 3 by the second fixing nail 23.
[0042] In this embodiment, a sealing strip 29 is provided at the joint between the end of the first leveling layer 18 near the expansion joint and the top waterproof layer 16.
[0043] The construction method for this expansion joint structure that combines prevention and drainage includes the following steps.
[0044] Step 1: Install the upper right flap 3 on the top of the floor slab 1 on the right side of the expansion joint; when constructing the upper right flap 3, make the upper end of the upper right flap 3 extend beyond the upper end of the upper left flap 2, and install a folding plate 7 on the left side of the extended part.
[0045] Step 2: Pre-embed limit rods 26 longitudinally at intervals on the top of the floor slab 1 on the left side of the expansion joint, near the right edge; then install the guide channel 12, so that the horizontal strip hole 27 of the folded edge 13 is fitted onto the limit rod 26 and is horizontally adjustable to the limit rod 26. Connect the right end of the guide channel 12 to the right side wall of the expansion joint 4 with fasteners.
[0046] Step 3: Construct the upper left flap 2. During the construction of the upper left flap 2, a slot 6 is set along the longitudinal length of the bottom of the upper left flap 2 facing the expansion joint 4, and the limiting rod 26 and the folded edge 13 are located in the slot 6. After the construction of the upper left flap 2 is completed, the second insulation layer 21 is constructed at the root of the right side of the upper right flap 3. Then, from bottom to top, the bottom waterproof layer 14, the mortar bonding layer 15, the top waterproof layer 16, the first insulation layer 17, and the first leveling layer 18 are constructed on the top of the floor slab 1 on both sides of the expansion joint 4. A sealing layer 22 is set on the top of the second insulation layer 21 on the right side of the expansion joint 4. Then, a third insulation layer 5 is set on the top surface of the upper right flap 3 and the right side above the second insulation layer 21. A finishing mortar layer 25 is set on the outside of the third insulation layer 5. Finally, a protective plate 24 is covered on the outside of the third insulation layer 5.
[0047] Step 4, install the sealing structure: place the upper sealing plate 8 along its longitudinal length in the gap between the top of the upper left flap 2 and the folding plate 7, and fill the U-shaped groove of the upper sealing plate 8 with the sealing strip 9.
[0048] Step 5, install the lower sealing structure: place the lower sealing strip 10 along the longitudinal length at the bottom of the expansion joint 4, and cover the bottom of the expansion joint 4 with the cover plate 11, so that the left and right sides of the cover plate 11 are fixed to the structures on both sides of the expansion joint 4 respectively. The construction is now complete.
[0049] The above embodiments are not exhaustive examples of specific implementation methods, and other embodiments are also possible. The purpose of the above embodiments is to illustrate the present invention, rather than to limit the scope of protection of the present invention. All applications derived from simple variations of the present invention fall within the scope of protection of the present invention.
Claims
1. A combined expansion joint structure for preventing and draining water flow, disposed in an expansion joint (4) between adjacent building floor slabs (1); characterized in that: It includes a left upper flap (2), a right upper flap (3), an upper sealing structure, and a lower sealing structure; the left upper flap (2) is set longitudinally on the floor slab (1) to the left of the expansion joint (4), and the right side of the left upper flap (2) is vertically aligned with the left side wall of the expansion joint (4); at the bottom of the left upper flap (2), a slot (6) is set longitudinally on the side facing the expansion joint (4); in the slot (6), limit rods (26) are set longitudinally at intervals; the right upper flap (3) is set longitudinally on the floor slab (1) to the right of the expansion joint (4), and the left side of the right upper flap (3) is vertically aligned with the left side wall of the expansion joint (4). The right side wall of the seam (4) is vertically aligned; the upper end of the upper right flap (3) extends beyond the upper end of the upper left flap (2), and a folding plate (7) is provided on the left side of the extended part; the folding plate (7) is located above the expansion joint (4) and the upper left flap (2), and the top surface of the folding plate (7) is a slope that gradually slopes downward from the root to the end; the upper sealing structure includes an upper sealing plate (8) and an upper sealing strip (9); the upper sealing plate (8) is a horizontal U-shape, which is set longitudinally in the gap between the top of the upper left flap (2) and the folding plate (7), and the U-shaped groove of the upper sealing plate (8) faces to the left; the upper The sealing strip (9) is filled in the U-shaped groove of the upper sealing plate (8); the lower sealing structure includes a lower sealing strip (10) and a cover plate (11); the lower sealing strip (10) is arranged longitudinally along the lower part of the expansion joint (4); the cover plate (11) is placed on the bottom of the expansion joint (4), and the left and right sides of the cover plate (11) are fixed to the structures on both sides of the expansion joint (4); a guide groove (12) is provided in the expansion joint (4) at the position corresponding to the slot (6); the guide groove (12) is strip-shaped and is arranged longitudinally along the long axis of the expansion joint (4) in the expansion joint (4 ... 2) The cross-section is U-shaped. The left end of the guide channel (12) is bent outward horizontally to form a folded edge (13). The folded edge (13) is inserted into the slot (6), and a horizontal bar hole (27) is provided on the folded edge (13) at the position corresponding to the limit rod (26). The horizontal bar hole (27) of the folded edge (13) is fitted onto the limit rod (26) and is horizontally adjustable to the limit rod (26). The right end of the guide channel (12) is connected to the right side wall of the expansion joint (4) through fasteners. Waterproof sealant (28) is provided at the joint between the right end of the guide channel (12) and the right side wall of the expansion joint (4).
2. The expansion joint structure combining prevention and drainage according to claim 1, characterized in that: The width of the expansion joint (4) is 80mm~120mm.
3. The expansion joint structure combining prevention and drainage according to claim 1, characterized in that: At the bottom of the floor slabs on both sides of the expansion joint (4), a side beam (19) is provided along the corresponding side of the expansion joint (4); the width of the side beam (19) is not less than 300mm.
4. The expansion joint structure combining prevention and drainage according to claim 1, characterized in that: The distance between the folding plate (7) and the upper left flap (2) is adapted to the width of the deformation joint (4), which is 80mm~120mm; the slope of the top surface of the folding plate (7) is 1%~2%.
5. The expansion joint structure combining prevention and drainage according to claim 1, characterized in that: The height of the upper left flap (2) is no more than 600mm; the width of the folding plate (7) is no less than 400mm, and the end of the folding plate (7) extends beyond the right side of the upper left flap (2).
6. The expansion joint structure combining anti-drainage and drainage according to claim 1, characterized in that: The top of the floor slabs (1) on both sides of the expansion joint (4) is provided with a bottom waterproof layer (14), a mortar bonding layer (15), a top waterproof layer (16), a first insulation layer (17), and a first leveling layer (18) in sequence from bottom to top; the upper ends of the bottom waterproof layer (14) and the top waterproof layer (16) on the left side of the expansion joint (4) extend to the top of the upper left flap (2); the upper sealing plate (8) is pressed onto the upper ends of the bottom waterproof layer (14) and the top waterproof layer (16) on the left side of the expansion joint (4); the upper ends of the bottom waterproof layer (14) and the top waterproof layer (16) on the right side of the expansion joint (4) extend to the right side of the upper right flap (3), and the upper ends of the bottom waterproof layer (14) and the top waterproof layer (16) on the right side of the expansion joint (4) are also provided with a bottom waterproof layer (14) and a top waterproof layer (16) on the right side of the expansion joint (4). The first fixing nail (20) is fixed to the upper right flap (3); a second insulation layer (21) is provided between the bottom waterproof layer (14) on the right side of the expansion joint (4) and the upper right flap (3); a sealing layer (22) is provided on the top of the second insulation layer (21); a third insulation layer (5) is provided on the top surface of the upper right flap (3) and the right side above the second insulation layer (21); a protective plate (24) is covered on the outside of the third insulation layer (5); the lower end of the protective plate (24) overlaps the upper outside of the top waterproof layer (16) on the corresponding side, and the upper end of the protective plate (24) blocks the outside of the joint between the upper sealing plate (8) and the folding plate (7); a finishing mortar layer (25) is provided on the outside of the third insulation layer (5).
7. The expansion joint structure combining anti-drainage and drainage according to claim 6, characterized in that: A sealing strip (29) is provided at the joint between the end of the first leveling layer (18) near the expansion joint and the top waterproof layer (16).
8. A construction method for a combined anti-drainage and drainage expansion joint structure as described in any one of claims 1-7, characterized in that, The steps include the following: Step 1: Install a right upper flap (3) on the top of the floor slab (1) on the right side of the expansion joint; when constructing the right upper flap (3), make the upper end of the right upper flap (3) extend beyond the upper end of the left upper flap (2), and install a folding plate (7) on the left side of the extended part. Step 2: On the top of the floor slab (1) on the left side of the expansion joint, near the right edge, embed the limiting rod (26) at longitudinal intervals; then install the guide groove (12) so that the horizontal strip hole (27) of the folded edge (13) is fitted onto the limiting rod (26) and is horizontally adjustable to the limiting rod (26). Connect the right end of the guide groove (12) to the right side wall of the expansion joint (4) through fasteners. Step 3, construct the upper left flap (2). When constructing the upper left flap (2), a slot (6) is set along the longitudinal length of the bottom of the upper left flap (2) facing the expansion joint (4), and the limiting rod (26) and the folded edge (13) are located in the slot (6). Step 4, install the upper sealing structure: place the upper sealing plate (8) along the longitudinal length in the gap between the top of the upper left flap (2) and the folding plate (7), and fill the U-shaped groove of the upper sealing plate (8) with the sealing strip (9). Step 5, install the lower sealing structure: place the lower sealing strip (10) along the longitudinal length at the bottom of the expansion joint (4), and cover the bottom of the expansion joint (4) with a cover plate (11) so that the left and right sides of the cover plate (11) are fixed to the structures on both sides of the expansion joint (4). The construction is now complete.
9. The construction method of the expansion joint structure combining prevention and drainage according to claim 8, characterized in that: After the construction of the upper left flap (2) in step three is completed, the second insulation layer (21) is constructed at the root of the right side of the upper right flap (3); then the bottom waterproof layer (14), mortar bonding layer (15), top waterproof layer (16), first insulation layer (17) and first leveling layer (18) are constructed sequentially from bottom to top on the top of the floor slab (1) on both sides of the expansion joint (4); a sealing layer (22) is set on the top of the second insulation layer (21) on the right side of the expansion joint (4); then a third insulation layer (5) is set on the top surface of the upper right flap (3) and the right side above the second insulation layer (21), and a finishing mortar layer (25) is set on the outside of the third insulation layer (5); finally, a protective board (24) is covered on the outside of the third insulation layer (5).