Roof waterproof joint, structure and construction method

Abstract

The roof waterproof structure node comprises a roof, a lower impermeable layer, a support and a crack, the roof comprises roof steel bars and roof concrete, the roof steel bars comprise roof longitudinal bars and roof transverse bars, and the lower impermeable layer comprises lower impermeable layer steel bars and lower impermeable layer filler. The lower anti-seepage layer reinforcing steel bars comprise lower anti-seepage layer longitudinal bars and lower anti-seepage layer transverse bars, the crack is located on the top plate and filled with plugging objects and lower anti-seepage layer filler to plug the crack, transverse holes are formed in the support, the ends of the lower anti-seepage layer longitudinal bars extend into the transverse holes, and the combination face of the top plate and the lower anti-seepage layer is a rough face. The anti-seepage capability of the top plate is effectively improved, and secondary seepage is reduced.

Description

Technical Field

[0001] This invention belongs to the field of waterproofing technology, and specifically relates to a waterproofing node, structure and construction method for roof slabs. Background Technology

[0002] Cracks and leaks in roof slabs and basement slabs are common problems. To address this issue, pressure grouting is typically performed at the cracks in the slab to seal the water seepage from above. However, even after sealing, the slab often continues to crack and leak over time due to the presence of water above it. Summary of the Invention

[0003] This invention provides a waterproof joint, structure, and construction method for roof slabs, solving the problem of continued cracking and leakage after pressure grouting of the roof slab.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A waterproofing joint for a roof slab includes a roof slab, a lower waterproofing layer, supports, and cracks. The roof slab includes roof slab reinforcement and roof slab concrete. The roof slab reinforcement includes longitudinal and transverse reinforcement. The lower waterproofing layer includes lower waterproofing layer reinforcement and lower waterproofing layer filler. The lower waterproofing layer reinforcement includes lower waterproofing layer longitudinal and transverse reinforcement. Cracks are located in the roof slab. The lower waterproofing layer filler seals the cracks. The cracks are filled with sealing material and supported by transverse holes. The ends of the lower waterproofing layer reinforcement extend into the transverse holes. The transverse holes contain filler material. The interface between the roof slab and the lower waterproofing layer is a rough surface.

[0006] Preferably, the inner surface of the transverse hole is rough.

[0007] Preferably, the lower impermeable layer filler is UHPC.

[0008] Preferably, there is a waterproof coating between the top slab and the lower waterproof layer and / or an external waterproofing material on the outside of the crack.

[0009] Preferably, the support is an external wall, and the depth of the horizontal holes does not exceed 80% of the thickness of the external wall. The inner surface of the horizontal holes is coated with a waterproof material.

[0010] Preferably, the support is an inner beam or wall, with transverse holes penetrating the support; the lower impermeable layer reinforcement is continuous in the transverse holes.

[0011] Preferably, the support is an inner beam or wall, and the transverse hole does not penetrate the inner beam or wall; the lower impermeable layer reinforcement is disconnected in the transverse hole.

[0012] Preferably, the lower impermeable layer steel reinforcement has at least two sides fixedly connected to the support.

[0013] Preferably, the lower impermeable layer longitudinal reinforcement and the lower impermeable layer transverse reinforcement are two layers, with each layer arranged at an interval.

[0014] A construction method for a reinforced roof slab waterproof joint, the steps of which are as follows:

[0015] Step 1: Process the reinforcing steel bars for the lower seepage-proof layer of the roof waterproofing structure according to the design requirements;

[0016] Step 2: Roughen the inner surface of the top slab and clean off any dust; make horizontal holes in the support, clean the concrete in the horizontal holes, and clean off any dust.

[0017] Step 3: Seal the cracks in the roof slab by injecting sealing material.

[0018] Step 4: Insert the end of the lower waterproofing layer reinforcing bar into the horizontal hole.

[0019] Step 5: Pour filler material into the transverse holes and cure until the predetermined strength is reached;

[0020] Step 6: Tie the remaining reinforcing bars for the lower impermeable layer;

[0021] Step 7: Construct the filler for the lower impermeable layer and cure it to the predetermined strength.

[0022] Compared with the prior art, the present invention has the following features and beneficial effects.

[0023] 1. Provide details on the waterproofing of the roof slab with an underlying impermeable layer to reduce leakage.

[0024] 2. Add waterproof coatings and / or external waterproofing materials to form multiple layers of enhanced waterproofing measures and reduce leakage.

[0025] 3. Provide a waterproof structure with a lower seepage barrier layer to increase the overall rigidity and out-of-plane bending load-bearing capacity of the roof slab, and reduce roof slab deformation, cracking and leakage.

[0026] 4. Using UHPC reduces roof deformation and cracking caused by the impermeable layer. Attached Figure Description

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] Figure 1 Schematic diagram of waterproof joint of top slab Figure 1

[0029] Figure 2 Schematic diagram of waterproof joint of top slab Figure 2

[0030] Figure 3 Schematic diagram of waterproof structure of roof slab Figure 3

[0031] Figure 4 Schematic diagram of waterproof structure of roof slab Figure 4

[0032] Attached diagram labels: A - Basement roof slab, B - Lower waterproofing layer, 1 - Roof slab reinforcement, 1.1 - Roof slab longitudinal reinforcement, 1.2 - Roof slab transverse reinforcement, 2 - Roof slab concrete, 3 - Crack, 4 - Filler, 5 - Lower waterproofing layer reinforcement, 5.1 - Lower waterproofing layer longitudinal reinforcement, 5.2 - Lower waterproofing layer transverse reinforcement, 6 - Lower waterproofing layer sealing material, 7 - Transverse hole, 8 - Filler, 9 - Waterproofing coating, 10 - External waterproofing material

[0033] To better understand the purpose, technical solution, and function of this invention, the invention will be described in further detail below with reference to the accompanying drawings. Here, illustrative embodiments and their descriptions are used to explain the invention, but are not intended to limit the invention.

[0034] In the description of this invention, it should be understood that the terms "comprising / including," "consisting of," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrase "comprising / including…" or "consisting of…" does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.

[0035] In this invention, unless otherwise explicitly specified and limited, the term "fixed connection" should be interpreted broadly, for example, it can refer to a sleeve connection, an lap joint, a weld, a bolted connection, or a combination of the above connections; the terms "installation," "connection," and "linking" should also be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components; the term "continuous reinforcing bar" refers to a reinforcing bar that is continuous without breakage, or a reinforcing bar that is broken but with a fixed connection between the broken reinforcing bars. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The implementation of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0037] To achieve the above objectives, the present invention adopts the following technical solution.

[0038] like Figure 1As shown, a waterproof joint for a roof slab includes a roof slab A, a lower waterproof layer B, a support C, and a crack 3. The roof slab A includes roof slab reinforcement 1 and roof slab concrete 2. The roof slab reinforcement 1 includes longitudinal reinforcement 1.1 and transverse reinforcement 1.2. The lower waterproof layer B includes lower waterproof layer reinforcement 5 and lower waterproof layer filler 6. The lower waterproof layer reinforcement 5 includes lower waterproof layer longitudinal reinforcement 5.1 and lower waterproof layer transverse reinforcement 5.2. The crack 3 is located in the roof slab A. The lower waterproof layer filler 6 seals the crack 3, and the crack 3 is filled with sealing material 4. The support C has transverse holes 7. The ends of the lower waterproof layer reinforcement 5 extend into the transverse holes 7, and the transverse holes 7 contain filler material 8. The interface between the roof slab A and the lower waterproof layer B is a rough surface.

[0039] Cracks and leaks in roof slabs and basement slabs are common phenomena caused by water accumulation. The inventors have discovered that one of the main causes of these leaks is that existing sealing techniques typically only seal the cracks. Under water pressure, the slab may lack sufficient out-of-plane stiffness or load-bearing capacity, leading to further cracking. Simple traditional grouting is often ineffective in sealing these cracks, and they usually continue to crack over time. This invention first fills the existing cracks with a sealing material, then adds a reinforcing layer to the underside of the slab. This reinforcing layer contains steel reinforcement, and the filler is concrete, cement mortar, or grouting material, forming a structural layer. The reinforcing layer increases the stiffness and load-bearing capacity of the existing slab while adding an extra layer of waterproofing, improving its crack resistance and impermeability. The roughened interface allows the lower waterproofing layer and the slab to form a unified whole, increasing the shear capacity of the interface.

[0040] In practice, the inner surface of the transverse hole 7 is roughened. A roughened inner surface of the transverse hole is beneficial for improving the anchoring effect of the reinforcing rib.

[0041] In specific implementation, such as Figure 2 As shown, there is a waterproof coating 9 between the top slab A and the lower waterproof layer B, and an external waterproofing material 10 on the outside of the crack 3. Function: To form multiple layers of waterproofing.

[0042] In specific implementation, a seepage-proof coating 9 is applied between the top slab A and the lower seepage-proof layer B. The seepage-proof coating should be 0.1mm to 1mm thick, with a thickness not exceeding 3mm, and should be composed of inorganic seepage-proof materials, organic seepage-proof materials, or a combination of organic and inorganic seepage-proof materials. The seepage-proof material should have a certain strength, which should not be less than 20% of the strength of the reinforcing layer filler. Function: It can prevent seepage while also transmitting shear force.

[0043] In practice, the thickness of the lower impermeable layer B should not exceed 300mm, and should ideally be 40-60mm. This reduces the thickness of the lower impermeable layer, decreases its weight, and reduces additional deformation and cracking on the roof slab.

[0044] In practice, the lower impermeable layer filler 6 is made of concrete or cement mortar.

[0045] In practical implementation, the lower impermeable layer filler 6 is UHPC. Ultra-high performance concrete (UHPC) combines advanced fiber and cementitious material technologies to achieve high strength and excellent durability. This material often has micropores, which prevent the ingress of harmful substances such as water, gas, and chlorides. Its thickness does not exceed 35mm, and the corresponding steel reinforcement diameter does not exceed 10mm. Its function is to effectively reduce the weight of the lower impermeable layer, thereby reducing the resulting deformation and cracking; and UHPC has good crack resistance, effectively preventing leakage.

[0046] In practice, support C is the exterior wall, the depth of the horizontal hole 7 does not exceed 80% of the thickness of the exterior wall, and the inner surface of the horizontal hole 7 is coated with a waterproof material. Function: To prevent water from seeping into the exterior wall.

[0047] In specific implementation, such as Figure 3 As shown, support C is an internal beam or internal wall, and transverse hole 7 penetrates support C. The lower waterproof layer reinforcement is continuous in transverse hole 7. Function: When both sides of the top slab of the internal beam / internal wall require waterproofing, this solution reduces anchorage, ensures continuous reinforcement in the strengthening layer, improves its load-bearing capacity and stiffness.

[0048] In specific implementation, such as Figure 4 As shown, support C is an internal beam or wall, and transverse hole 7 does not penetrate the internal beam or wall; the lower waterproofing layer reinforcement is interrupted at transverse hole 7. Function: When waterproofing is required on one side of the top slab of the internal beam / wall, this solution reduces the amount of reinforcement work and improves its out-of-plane bearing capacity and stiffness.

[0049] In practice, at least two pairs of the reinforcing bars 5 in the lower impermeable layer are fixedly connected to the support C, forming a reinforced impermeable structure.

[0050] In practice, the lower impermeable layer steel bar 5 is fixedly connected to the support C on three sides to further increase its out-of-plane stiffness and reduce its deformation and cracking.

[0051] In practice, the four sides are fixedly connected to the support to further enhance the out-of-plane stiffness and load-bearing capacity of the top plate.

[0052] In practice, the lower impermeable layer longitudinal reinforcement 5.1 and the lower impermeable layer transverse reinforcement 5.2 are arranged in two layers, with each layer spaced apart. Function: To further increase the stiffness and out-of-plane bearing capacity of the reinforcing layer, thereby improving the impermeability.

[0053] A construction method for a reinforced roof slab waterproof joint, the steps of which are as follows:

[0054] Step 1: Process the reinforcing steel bars 5 of the lower seepage-proof layer of the waterproof structure of the roof slab according to the design requirements;

[0055] Step 2: Roughen the inner surface of the top plate and clean off any dust; make a horizontal hole 7 in support C, clean the concrete in the horizontal hole 7, and clean off any dust.

[0056] Step 3: Seal the cracks in the roof slab 3, and inject sealing material 4.

[0057] Step 4: Insert the end of the lower impermeable layer steel bar 5 into the transverse hole 7.

[0058] Step 5: Pour filler material 8 into the transverse hole 7 and cure it to the predetermined strength;

[0059] Step 6: Tie the remaining reinforcing bars of the lower seepage barrier layer B;

[0060] Step 7: Install filler 6 under the lower impermeable layer B and cure it to the predetermined strength.

[0061] The above embodiments only illustrate several implementation methods of this patent, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the protection scope of this invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A roof water-proofing node, characterized by: The roof waterproof joint comprises a roof (A), a lower impermeable layer (B), a support (C) and a crack (3); the roof (A) comprises roof reinforcement (1) and roof concrete (2); the roof reinforcement (1) comprises roof longitudinal reinforcement (1.1) and roof transverse reinforcement (1.2); the lower impermeable layer (B) comprises lower impermeable layer reinforcement (5) and lower impermeable layer filler (6); the lower impermeable layer reinforcement (5) comprises lower impermeable layer longitudinal reinforcement (5.1) and lower impermeable layer transverse reinforcement (5.2); the crack (3) is located in the roof (A); the lower impermeable layer filler (6) blocks the crack (3); the crack (3) is filled with a blocking material (4); the support (C) has a transverse hole (7); the lower impermeable layer reinforcement (5) extends into the transverse hole (7); the transverse hole (7) has a filler (8); and the joint surface between the roof (A) and the lower impermeable layer (B) is a rough surface.

2. The roof water-proofing node of claim 1, wherein: The inner surface of the transverse hole (7) is a rough surface.

3. The roof water-proofing node of claim 1, wherein: The lower impermeable layer filler (6) is UHPC.

4. The roof water-proofing node of claim 1, wherein: There is impermeable coating (9) between the roof (A) and the lower impermeable layer (B), and / or there is outer impermeable material (10) outside the crack (3).

5. The roof water-proofing node of claim 1, wherein: The support (C) is an outer wall, the depth of the transverse hole (7) is not more than 80% of the thickness of the outer wall, and the inner surface of the transverse hole (7) is coated with impermeable material.

6. The roof water-proofing node of claim 1, wherein: The support (C) is an inner beam or an inner wall, the transverse hole (7) penetrates the support (C), and the lower impermeable layer reinforcement is continuous in the transverse hole (7).

7. The roof water-proofing node of claim 1, wherein: The support (C) is an inner beam or an inner wall, the transverse hole (7) does not penetrate the inner beam or the inner wall, and the lower impermeable layer reinforcement (5) is discontinuous in the transverse hole (7).

8. The ceiling waterproof structure according to claim 1, characterized by: The lower impermeable layer reinforcement (5) is fixedly connected to the support (C) on two sides.

9. The roof waterproof structure according to claim 8, characterized by: The lower impermeable layer longitudinal reinforcement (5.1) and the lower impermeable layer transverse reinforcement (5.2) are two layers, and each layer is arranged at intervals.

10. A construction method of a strong roof waterproof joint, characterized in that: The steps are as follows: Step one: process the lower impermeable layer reinforcement (5) of the roof waterproof structure according to the design requirements; Step two: roughen the inner surface of the roof, clean the dust, open the transverse hole (7) in the support (C), clean the concrete in the transverse hole (7), and clean the dust; Step three: block the crack (3) of the roof and inject the blocking material (4); Step four: insert the end of the lower impermeable layer reinforcement (5) into the transverse hole (7); Step five: pour the filler (8) in the transverse hole (7) and cure it to the predetermined strength; Step six: tie the other reinforcement of the lower impermeable layer (B); Step seven: construct the filler (6) of the lower impermeable layer (B) and cure it to the predetermined strength.

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