Basement roof deformation joint waterproof and drainage integrated system and construction method

Abstract

The basement roof deformation joint waterproof and drainage integrated system and construction method belong to the field of building construction, and the basement roof deformation joint waterproof and drainage integrated system comprises a basement roof structure, a drainage bottom plate embedded in the basement roof structure, a waterproof supporting plate clamped on the drainage bottom plate, a rubber waterstop arranged on the waterproof supporting plate, a waterproof cover plate arranged on the rubber waterstop, a water retaining ridge cast at the basement deformation joint and around the waterproof cover plate, a basement roof waterproof layer covered on the water retaining ridge, and a basement roof waterproof protective layer covered on the basement roof waterproof layer; the rubber waterstop and the waterproof cover plate are clamped in the waterproof supporting plate; a through slit is reserved above the waterproof cover plate in the water retaining ridge, and the through slit is filled with a high polymer pitch ointment; pitch hemp is filled in the waterproof supporting plate; and the waterproof cover plate is filled with a waterproof filler. The basement roof deformation joint waterproof and drainage integrated system solves the problems that the basement roof deformation joint structure is complex, the construction is difficult, and leakage is caused by structure displacement on both sides.

Description

Technical Field

[0001] This invention belongs to the field of building construction, specifically relating to an integrated waterproofing and drainage system for basement roof expansion joints and its construction method. Background Technology

[0002] Currently, the common design for waterproofing expansion joints in basement roof slabs employs a combination of embedded waterstops and external or removable waterstops. During the construction of the basement roof slab structure, embedded waterstops need to be pre-embedded, and simultaneously, external waterstops or components required for removable waterstops need to be installed during the concrete construction of the basement roof slab. This combination of embedded and external / removable waterstops provides two layers of waterproofing for the basement roof slab expansion joints.

[0003] ① Existing expansion joint construction processes are cumbersome and lack operability. Because embedded rubber waterstops need to be pre-embedded, and these waterstops are located in the middle of the structure without any support or fixing points, it's necessary to consider how to install and fix them. When the expansion joint is flanked by structural beams, the embedded waterstops cannot be directly pre-embedded due to the influence of the beam stirrups, requiring a separate structural design to meet the installation requirements. Furthermore, because rubber waterstops are flexible and soft, they are prone to bending, twisting, and lack of extension during fixing, easily affecting the waterproofing effect. This invention aims to solve the problem of difficult installation of embedded waterstops, explore a simpler installation method, and find a waterproofing structure unaffected by the structural type (beam or slab) on both sides of the expansion joint.

[0004] ② Existing expansion joint structures have weak resistance to deformation and limited ability to prevent waterproofing damage. Whether externally applied or removable, when the structures on both sides of the expansion joint deform, the bonding area between the rubber waterstop and the concrete structure is prone to cracking and damage, creating seepage channels that render the outer rubber waterstop's waterproof layer ineffective, thus creating a potential leakage problem. Simultaneously, embedded rubber waterstops are in direct contact with the concrete structure; when uneven settlement occurs on both sides of the expansion joint, sharp stones in the concrete can easily damage the embedded rubber waterstop, leading to leakage. This invention aims to improve the deformation resistance of basement expansion joint structures, enabling them to adapt to structural deformation on both sides of the basement roof slab without causing waterproofing damage. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated waterproofing and drainage system and construction method for basement roof expansion joints, solving the problems of complex structure, high construction difficulty, and easy leakage caused by displacement of the structures on both sides of the basement roof expansion joint.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The integrated waterproofing and drainage system for basement roof expansion joints includes the basement roof structure, a drainage base slab embedded in the basement roof structure, a waterproof support plate snapped onto the drainage base slab, a rubber waterstop set on the waterproof support plate, a waterproof cover plate set on the rubber waterstop, a water-retaining curb poured at the basement expansion joint and around the waterproof cover plate, a basement roof waterproofing layer covering the water-retaining curb, and a basement roof waterproofing protective layer covering the basement roof waterproofing layer; both the rubber waterstop and the waterproof cover plate are snapped into the waterproof support plate; a through joint is reserved inside the water-retaining curb and above the waterproof cover plate, and the through joint is filled with polymer asphalt ointment; the waterproof support plate is filled with asphalt hemp fiber; and the waterproof cover plate is filled with waterproof filler.

[0007] A further preferred technical solution: The drainage base plate includes an isosceles trapezoidal base plate body that is larger at the top and smaller at the bottom, with an opening at the top. The two ends of the base plate body are bent outward horizontally to form a retaining edge. Vertical water-stop baffles are welded to both ends of the retaining edge. Anchor hooks are welded to the outer side of the base plate body. The anchor hooks are welded to the connection between the base plate body and the retaining edge. A water-blocking protrusion is provided at the outer end of the upper surface of the retaining edge, and a connecting bolt hole is opened at the inner end of the retaining edge.

[0008] A further preferred technical solution: The waterproof tray includes an isosceles trapezoidal tray body that is larger at the top and smaller at the bottom, with an opening at the top. The two ends of the tray body are bent outward horizontally to form connecting edges. The ends of the connecting edges are bent inward in an L-shape, and the space between the connecting edges and the connecting edges forms a locking groove. The inner end of the connecting edge has a fixing bolt hole, and the outer end of the lower surface of the connecting edge is bent upward to form a limiting groove. The end of the locking groove has a fastening bolt hole.

[0009] A further preferred technical solution: The waterproof cover plate includes a U-shaped cover plate body with the opening facing downwards, the two ends of the cover plate body are bent outwards horizontally to form insert edges, and the lower surface of the insert edges is provided with sealing ribs at the outer end; the top surface of the cover plate body is serrated.

[0010] A further preferred technical solution: The space between the base plate body and the support plate body forms a drainage cavity.

[0011] A further preferred technical solution: the water-blocking protrusion is correspondingly and restrictively contained within the limiting groove; The connecting bolt holes and the fixing bolt holes are aligned vertically, and the drainage base plate and the waterproof support plate are fixed by fixing bolts that pass through the connecting bolt holes and the fixing bolt holes.

[0012] A further preferred technical solution: the two ends of the rubber waterstop are engaged in the bayonet opening.

[0013] A further preferred technical solution: the insert edge of the waterproof cover plate is engaged within the bayonet opening.

[0014] A further preferred technical solution: the fastening bolts passing through the fastening bolt holes are pressed against the upper surface of the waterproof cover.

[0015] The construction method and steps for the integrated waterproofing and drainage system for basement roof expansion joints are as follows: Step 1: Use galvanized steel sheets to process drainage base plates, waterproof support plates, and waterproof cover plates according to the design dimensions.

[0016] Step 2: Pre-embed a drainage base plate during the construction of the basement roof structure.

[0017] Step 3: Secure the waterproof tray to the drainage base plate using fixing bolts.

[0018] Step 4: Fill the inner groove of the waterproof tray with asphalt-impregnated hemp fibers.

[0019] Step 5: Insert the rubber waterstop into the slot of the waterproof tray and place it on the waterproof tray.

[0020] Step 6: Insert the waterproof cover into the slot of the waterproof support plate and place it above the rubber waterstop.

[0021] Step 7: Fill the space between the rubber waterstop and the waterproof cover with waterproof filler.

[0022] Step 8: Tighten the fastening bolts on the waterproof tray clamp.

[0023] Step nine: Construct a concrete retaining wall, leaving a continuous joint in the middle of the expansion joint of the basement roof slab.

[0024] Step 10: Fill the gaps with polymeric asphalt ointment: When constructing the water-retaining sill, place foam strips on the waterproof cover plate at the locations where through gaps are required. After the sill is poured and formed, remove the foam strips and fill the gaps with polymeric asphalt ointment.

[0025] Step 11: Apply the waterproofing layer to the basement roof slab.

[0026] Step 12: Construct the waterproof protective layer for the basement roof slab.

[0027] Step thirteen: Inspection and acceptance.

[0028] Compared with the prior art, the present invention has the following characteristics and beneficial effects: 1. This invention can be used for waterproof construction of basement roof expansion joints under various structural types and working conditions. Whether the structures on both sides of the expansion joint are slabs or beams, it does not affect the installation and use of this invention.

[0029] It can be used for simultaneous construction of structures on both sides of the expansion joint, or for construction of structures on both sides at different times. It can be assembled into a whole first and then pre-embedded, or it can be installed in sections on site step by step, meeting the construction requirements under various working conditions and having a wide range of applications.

[0030] 2. This invention has a total of five waterproofing layers. The first layer is a water-retaining retaining wall and polymer asphalt ointment, the second layer is a waterproof cover plate, the third layer is a rubber waterstop, the fourth layer is a waterproof support plate and asphalt hemp fiber, and the fifth layer is a drainage base plate. The five waterproofing layers can greatly enhance the waterproofing effect of the expansion joints of the basement roof slab.

[0031] Meanwhile, the fifth layer of waterproofing also serves as drainage, so that even if leakage occurs, water can be drained in time without affecting the use of the building below.

[0032] 3. The present invention adopts a slot design, and the rubber waterstop and waterproof cover plate can be placed into the slot, which makes the installation convenient and quick, and makes it easier to carry out on-site construction.

[0033] Meanwhile, the rubber waterstop is placed in a metal enclosure, which improves its durability. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the integrated waterproofing and drainage system for basement roof expansion joints of the present invention.

[0035] Figure 2 This is a diagram showing the completed assembly of the expansion joint waterproofing and drainage system according to the present invention.

[0036] Figure 3 This is a schematic diagram of the drainage base plate of the present invention.

[0037] Figure 4 This is a schematic diagram of the waterproof tray of the present invention.

[0038] Figure 5 This is a schematic diagram of the waterproof cover plate of the present invention.

[0039] Attached diagram labels: 1—Basement roof structure; 2—Drainage base slab; 3—Waterproof support plate; 4—Fixing bolt; 5—Asphalt hemp fiber; 6—Rubber waterstop; 7—Waterproof filler; 8—Waterproof cover plate; 9—Fastening bolt; 10—Polymer asphalt ointment; 11—Water-retaining curb; 12—Basement roof waterproof layer; 13—Basement roof waterproof protective layer. 2.1 – Base plate main body; 2.2 – Anchoring hook; 2.3 – Waterstop baffle; 2.4 – Water-blocking protrusion; 2.5 – Connecting bolt hole; 3.1 – Pallet body; 3.2 – Bayonet; 3.3 – Fixing bolt holes; 3.4 – Fastening bolt holes; 3.5 – Limiting groove; 8.1 – Cover plate body; 8.2 – Sealing rib. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] See Figures 1 to 5 As shown, this invention relates to an integrated waterproofing and drainage system for basement roof expansion joints and its construction method.

[0042] This invention relates to an integrated waterproofing and drainage system for basement roof expansion joints, comprising a basement roof structure 1, a drainage base slab 2 embedded within the basement roof structure 1, a waterproof support plate 3 fitted onto the drainage base slab 2, a rubber waterstop 6 mounted on the waterproof support plate 3, a waterproof cover plate 8 mounted on the rubber waterstop 6, a water-retaining curb 11 cast at the basement expansion joint and around the waterproof cover plate 8, a basement roof waterproofing layer 12 covering the water-retaining curb 11, and a basement roof waterproofing protective layer 13 covering the basement roof waterproofing layer 12; both the rubber waterstop 6 and the waterproof cover plate 8 are fitted within the waterproof support plate 3; a through joint is pre-reserved within the water-retaining curb 11 and above the waterproof cover plate 8, and the through joint is filled with polymeric asphalt ointment 10; the waterproof support plate 3 is filled with asphalt-impregnated hemp fibers 5, which further enhances the waterproofing effect of the waterproof support plate 3; the waterproof cover plate 8 is filled with a waterproof filler 7, which further enhances the waterproofing effect of the waterproof cover plate 8.

[0043] The combination of drainage base plate 2, waterproof support plate 3 and waterproof cover plate 8 forms a drainage structure for the expansion joint.

[0044] See Figure 3 As shown, the drainage base plate 2 is made of galvanized steel plate with a thickness of 3-4mm. It includes an isosceles trapezoidal base plate body 2.1 with a larger top and smaller bottom and an open top. The two ends of the base plate body 2.1 are bent outward horizontally to form a retaining edge. Vertical water-stop baffles 2.3 are welded to the two ends of the retaining edge. Anchor hooks 2.2 are welded to the outer side of the base plate body 2.1. The anchor hooks 2.2 are welded to the connection between the base plate body 2.1 and the retaining edge. A water-blocking protrusion 2.4 is provided at the outer end of the upper surface of the retaining edge. A connecting bolt hole 2.5 is opened at the inner end of the retaining edge.

[0045] See Figure 4As shown, the waterproof tray 3 is made of galvanized steel plate with a thickness of 3-4mm. It includes an isosceles trapezoidal tray body 3.1 with a larger top and smaller bottom and an open top. The two ends of the tray body 3.1 are bent outward horizontally to form connecting edges. The ends of the connecting edges are bent inward in an L-shape, and the space between them forms a locking slot 3.2. The inner end of the connecting edge has a fixing bolt hole 3.3. The outer end of the lower surface of the connecting edge is bent upward and protrudes to form a limiting groove 3.5. The end of the locking slot has a fastening bolt hole 3.4.

[0046] See Figure 5 As shown, the waterproof cover plate 8 is made of galvanized steel plate with a thickness of 3-4mm. It includes a U-shaped cover plate body 8.1 with the opening facing downward. The two ends of the cover plate body 8.1 are bent outward horizontally to form insert edges. The lower surface of the insert edge is provided with a sealing rib 8.2 at the outer end. The top surface of the cover plate body 8.1 is serrated.

[0047] The base plate main body 2.1 is located in the basement expansion joint between the basement roof slab structure 1; the edge is engaged with the upper surface of the basement roof slab structure 1; the lower part of the water-stop baffle 2.3 is embedded in the basement roof slab structure 1; the anchoring hook 2.2 is embedded in the basement roof slab structure 1.

[0048] The bottom corner of the base plate body 2.1 is smaller than the bottom corner of the support plate body 3.1; the height of the base plate body 2.1 is greater than the height of the support plate body 3.1; the space between the base plate body 2.1 and the support plate body 3.1 forms a drainage cavity; if leakage occurs, water can still be discharged from the drainage cavity to avoid affecting the normal use of the building.

[0049] The water-blocking protrusion 2.4 is correspondingly fitted and restricted within the limiting groove 3.5; the connecting bolt hole 2.5 and the fixing bolt hole 3.3 are aligned vertically; the drainage base plate 2 and the waterproof support plate 3 are fixed by the fixing bolt 4 passing through the connecting bolt hole 2.5 and the fixing bolt hole 3.3.

[0050] The two ends of the rubber waterstop 6 are engaged within the locking slots 3.2.

[0051] The edge of the waterproof cover plate 8 is engaged within the slot 3.2.

[0052] The fastening bolt 9, passing through the fastening bolt hole 3.4, is tightened against the upper surface of the waterproof cover plate 8, thus securing the rubber waterstop 6 and the waterproof cover plate 8 within the bayonet 3.2.

[0053] Both the rubber waterstop 6 and the waterproof cover plate 8 need to be inserted into the slot 3.2 of the waterproof support plate 3. By tightening the fastening bolts 9 on the slot 3.2, the waterproof cover plate 8 and the rubber waterstop 6 are fixed tightly, ensuring that the rubber waterstop 6 fits as closely as possible to the waterproof cover plate 8 and the waterproof support plate 3, and ensuring the waterproof sealing effect.

[0054] After the drainage base plate 2, waterproof support plate 3 and waterproof cover plate 8 are installed, a 200mm high concrete water-retaining curb 11 can be poured at the expansion joint of the basement roof slab. This not only has a certain water-retaining effect, but also protects the drainage base plate 2, waterproof support plate 3 and waterproof cover plate 8, and facilitates the subsequent construction of waterproof membrane on the basement roof slab structure 1.

[0055] When constructing the water-retaining curb at the expansion joint of the basement roof slab, a 10cm wide through joint should be left at the expansion joint of the basement roof slab to ensure that the structural deformation on both sides of the expansion joint of the basement roof slab is not affected. The through joint can be sealed with high-polymer asphalt ointment 10 anti-corrosion and waterproof material.

[0056] If the water-retaining backsplash 11 is to be constructed a second time, the drainage base plate 2, waterproof support plate 3 and waterproof cover plate 8 of the construction part of the water-retaining backsplash 11 need to be roughened before construction to avoid the potential leakage at the root of the water-retaining backsplash.

[0057] The specific dimensions of each component need to be adjusted according to the design width of the expansion joint of the basement roof slab to avoid components being too large or too small, which would affect the installation of the waterproofing and drainage structure of the expansion joint of the basement roof slab.

[0058] The key point and the protected point of this invention is that it uses a combination of three waterproof metal plates—a drainage base plate 2, a waterproof support plate 3, and a waterproof cover plate 8—to form a rubber waterstop. The rubber waterstop is placed in the waterproof metal structure through a snap-fit ​​design, which not only effectively protects the rubber waterstop but also makes on-site operation and installation easier. At the same time, the interaction between the water-blocking protrusion 2.4 and the sealing rib 8.2 inside the snap-fit ​​makes the rubber waterstop more firmly fixed and further enhances the waterproof sealing performance.

[0059] The key point and the point to be protected in this invention is that the combined design of the water-retaining backsplash and the expansion joint waterproofing structure not only effectively protects the expansion joint waterproofing structure and enhances its durability, but also reduces the possibility of leakage between the expansion joint waterproofing structure and the concrete structure, and facilitates the construction of the subsequent waterproofing layer on the basement roof slab.

[0060] This invention relates to an integrated waterproofing and drainage system and construction method for basement roof expansion joints. It can be used for sealing basement roof expansion joints. The system is pre-embedded in the concrete structure of the basement roof using multiple layers of galvanized steel plates or aluminum alloy cover plates with rubber waterstops sandwiched inside. The excellent waterproofing performance of the metal plates and rubber waterstops is used to seal the basement roof expansion joints. At the same time, the bent metal plates and rubber materials can effectively resist the displacement of the structures on both sides, avoiding the risk of leakage caused by damage to the waterproofing system due to uneven deformation of the structures on both sides of the expansion joint.

[0061] Construction method of the integrated waterproofing and drainage system for basement roof expansion joints according to the present invention: Step 1: Use galvanized steel sheets to process the drainage base plate 2, waterproof support plate 3, and waterproof cover plate 8 according to the design dimensions.

[0062] Step 2: During the construction of the basement roof structure 1, a drainage base plate 2 is pre-embedded.

[0063] Step 3: Fix the waterproof support plate 3 to the drainage base plate 2 using fixing bolts 4.

[0064] Step 4: Fill the inner groove of the waterproof tray 3 with asphalt hemp fiber 5.

[0065] Step 5: Insert the rubber waterstop 6 into the slot of the waterproof support plate 3 and place it on the waterproof support plate 3.

[0066] Step 6: Insert the waterproof cover plate 8 into the slot of the waterproof support plate 3 and place it above the rubber waterstop 6.

[0067] Step 7: Fill the space between the rubber waterstop 6 and the waterproof cover plate 8 with waterproof filler 7.

[0068] Step 8: Tighten the fastening bolts 9 on the waterproof tray 3.

[0069] Step 9: Construct the concrete water-retaining curb 11, noting that a continuous joint should be left in the middle of the expansion joint of the basement roof slab. To further protect the waterproofing and drainage structure of the expansion joint, a water-retaining inverted curb needs to be constructed at the expansion joint location on the basement roof slab.

[0070] When the basement roof structure on both sides of the expansion joint is being constructed simultaneously, the waterproofing and drainage structure of the expansion joint can be assembled as a whole and placed at the expansion joint position of the basement roof. The water-retaining curb is then poured together with the basement roof structure on both sides of the expansion joint, resulting in better waterproofing performance.

[0071] When the basement roof structure on both sides of the expansion joint is not constructed simultaneously, the drainage support plate can be pre-embedded and installed during the construction of the basement roof structure on one side of the expansion joint. After the basement roof structure on both sides of the expansion joint is completed, the waterproof support plate, rubber waterstop, waterproof cover plate, etc. are installed on site, and finally the water-retaining backsplash is poured a second time.

[0072] Step 10: Fill the gaps with polymeric asphalt ointment 10: When constructing the water-retaining embankment, place foam strips on the waterproof cover plate at the locations where through gaps are required. After the embankment is poured and formed, remove the foam strips and fill the gaps with polymeric asphalt ointment.

[0073] Step 11: Construct the waterproof layer 12 on the basement roof slab.

[0074] Step 12: Construct the waterproof protective layer 13 for the basement roof slab.

[0075] Step Thirteen, Inspection and Acceptance: Once the construction of the waterproofing and drainage structure of the basement roof expansion joint is completed, a water storage or water spray test can be conducted to check the waterproofing effect of the expansion joint waterproofing and drainage structure.

[0076] When the basement roof expansion joint waterproofing structure has no leakage or a small amount of leakage can be quickly discharged through the drainage channel without affecting normal use, the upper structure of the basement roof can continue to be constructed according to the original design drawings.

[0077] Regular inspection items include: a) checking for leaks at the expansion joints of the basement roof slab; b) ensuring unobstructed drainage from the drainage channels.

[0078] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0079] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An integrated waterproofing and drainage system for basement roof expansion joints, characterized in that: The system includes a basement roof structure (1), a drainage base plate (2) embedded in the basement roof structure (1), a waterproof support plate (3) fitted onto the drainage base plate (2), a rubber waterstop (6) set on the waterproof support plate (3), a waterproof cover plate (8) set on the rubber waterstop (6), a water-retaining curb (11) poured at the basement expansion joint and around the waterproof cover plate (8), a basement roof waterproof layer (12) covering the water-retaining curb (11), and a basement roof waterproof protective layer (13) covering the basement roof waterproof layer (12); the rubber waterstop (6) and the waterproof cover plate (8) are both fitted into the waterproof support plate (3); a through joint is reserved in the water-retaining curb (11) and above the waterproof cover plate (8), and the through joint is filled with polymer asphalt ointment (10); the waterproof support plate (3) is filled with asphalt hemp fiber (5); and the waterproof cover plate (8) is filled with waterproof filler (7). The drainage base plate (2) includes an isosceles trapezoidal base plate body (2.1) that is larger at the top and smaller at the bottom and open at the top. The two ends of the base plate body (2.1) are bent outward horizontally to form a retaining edge. Vertical water-stop baffles (2.3) are welded to the two ends of the retaining edge. Anchor hooks (2.2) are welded to the outer side of the base plate body (2.1). The anchor hooks (2.2) are welded to the connection between the base plate body (2.1) and the retaining edge. A water-stopping protrusion (2.4) is provided at the outer end of the upper surface of the retaining edge. A connecting bolt hole (2.5) is opened at the inner end of the retaining edge. The waterproof tray (3) includes an isosceles trapezoidal tray body (3.1) that is larger at the top and smaller at the bottom and open at the top. The two ends of the tray body (3.1) are bent outward horizontally to form connecting edges. The ends of the connecting edges are bent inward in an L-shape and form a snap-fit ​​(3.2) with the space between them. The inner end of the connecting edge has a fixing bolt hole (3.3). The outer end of the lower surface of the connecting edge is bent upward and protrudes to form a limiting groove (3.5). The end of the snap-fit ​​has a fastening bolt hole (3.4). The waterproof cover (8) includes a U-shaped cover body (8.1) with the opening facing downward. The two ends of the cover body (8.1) are bent outward horizontally to form insert edges. The lower surface of the insert edges is provided with sealing ribs (8.2). The top surface of the cover body (8.1) is serrated. The space between the base plate body (2.1) and the support plate body (3.1) forms a drainage cavity; The water-blocking protrusion (2.4) is correspondingly and restrained within the limiting groove (3.5); The connecting bolt hole (2.5) and the fixing bolt hole (3.3) are aligned vertically, and the drainage base plate (2) and the waterproof support plate (3) are fixed by the fixing bolts (4) passing through the connecting bolt hole (2.5) and the fixing bolt hole (3.3); The two ends of the rubber waterstop (6) are engaged in the slots (3.2); The insert edge of the waterproof cover (8) is engaged within the slot (3.2); The fastening bolt (9) passing through the fastening bolt hole (3.4) is pressed against the upper surface of the waterproof cover plate (8).

2. The construction method of the integrated waterproofing and drainage system for basement roof expansion joints as described in claim 1, characterized in that, The steps are as follows: Step 1: Use galvanized steel sheets to process drainage base plate (2), waterproof support plate (3), and waterproof cover plate (8) according to the design dimensions. Step 2, during the construction of the basement roof structure (1), a drainage base plate (2) is pre-embedded. Step 3: Fix the waterproof tray (3) to the drainage base plate (2) with fixing bolts (4); Step 4: Fill the inner groove of the waterproof tray (3) with asphalt hemp fiber (5); Step 5: Insert the rubber waterstop (6) into the slot of the waterproof tray (3) and place it on the waterproof tray (3); Step 6: Insert the waterproof cover plate (8) into the slot of the waterproof support plate (3) and place it above the rubber waterstop (6); Step 7: Fill the space between the rubber waterstop (6) and the waterproof cover plate (8) with waterproof filler (7). Step 8: Tighten the fastening bolts (9) on the waterproof tray (3) clamp; Step 9: Construct a concrete water-retaining curb (11), leaving a through joint in the middle of the expansion joint of the basement roof slab; Step 10, use polymeric asphalt ointment (10) to fill the gaps: When constructing the water-retaining sill, place foam strips on the waterproof cover plate at the location where a through gap is required. After the sill is cast and formed, remove the foam strips and use polymeric asphalt ointment to fill the gaps. Step 11: Construct the waterproof layer for the basement roof slab (12). Step 12: Construct the waterproof protective layer for the basement roof slab (13). Step thirteen: Inspection and acceptance.

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