Construction method of waterproof structure for crack between masonry structure outer wall and frame beam

Abstract

The invention relates to a construction method of a waterproof structure for a crack between a masonry structure outer wall and a frame beam, which comprises the following steps of: (1) constructing a concrete frame structure, fixing an embedded section of a waterproof thin plate on a beam steel bar by welding and binding during frame beam construction, arranging a square wood box to be tightly attached to the waterproof thin plate, and then pouring frame beam concrete; (2) constructing a firstly-built part of the outer wall masonry structure, and building a later-built part after the firstly-built part settles, shrinks and stabilizes; (3) removing a square wood box preset in the frame beam, and stripping and exposing the waterproof thin plate at the embedded section; (4) covering a crack area between the outer wall and the frame beam with a waterproof thin plate extension section, wherein the waterproof thin plate extension section is connected with the waterproof thin plate of the embedded section through screws; (5) the grooves in the waterproof thin plate section area are blocked through grouting materials; and (6) a net hanging mortar layer and an outer wall decoration layer are sequentially constructed according to construction procedures. The water leakage problem of the outer wall settlement crack can be effectively prevented, and the waterproof performance and durability of a building are improved.

Description

Technical Field

[0001] The invention relates to a crack waterproof structure in a masonry structure building and a construction method, in particular to a crack waterproof structure between an outer wall and a frame beam of a masonry structure and a construction method. Background Art

[0002] In masonry buildings, the connection area between the exterior wall and the frame beam is a relatively fragile part of the building structure. Cracks often occur due to various factors such as foundation settlement, temperature changes or construction errors. The aerated concrete blocks that are currently widely used have unique material properties - high porosity and strong water absorption, which makes the wall prone to expansion and contraction deformation when the ambient humidity changes, thereby exacerbating the formation of cracks. These cracks not only affect the aesthetics of the building, but more importantly, they become the main channel for rainwater penetration, seriously threatening the safety and service life of the building. For a long time, the construction industry has been exploring effective waterproofing measures to solve this problem.

[0003] Traditionally, waterproofing treatment for cracks between exterior walls and frame beams mainly adopts coatings or coils. The main idea of ​​these methods is to form a waterproof barrier by painting or laying waterproof materials on or around the crack surface to prevent rainwater from penetrating. Although traditional coating and coil waterproofing methods can alleviate the problem of rainwater penetration to a certain extent, they are powerless when facing dynamic cracks. Cracks caused by factors such as foundation settlement and temperature changes are often dynamic, that is, the width, length and position of the cracks may change over time. Traditional waterproof materials, such as coatings and coils, often lack sufficient elasticity and adaptability, and it is difficult to automatically adjust with the changes in cracks, so that they cannot maintain effective waterproofing effects for a long time. In addition, the maintenance cost of traditional waterproof materials is relatively high. Once the waterproof material is damaged or aged, it needs to be repaired or replaced, which not only increases the maintenance cost, but also may affect the normal use of the building.

[0004] In summary, traditional coatings and membrane waterproofing methods and corresponding processes have obvious shortcomings in waterproofing the dynamic cracks between the exterior walls and frame beams of masonry structures. Summary of the invention

[0005] The present invention proposes a construction method for a waterproof structure for cracks between an outer wall of a masonry structure and a frame beam, aiming to effectively prevent water leakage problems in settlement cracks of the outer wall and improve the waterproof performance and durability of the building.

[0006] In order to effectively prevent water leakage from the settlement cracks between the outer wall of the masonry structure and the frame beam, the present invention adopts the following technical solution:

[0007] A construction method for a crack waterproof structure between a masonry structure exterior wall and a frame beam, comprising the following steps:

[0008] Step 1: Construct a concrete frame structure. When constructing the frame beam, fix the embedded section of the waterproof sheet on the beam reinforcement by welding and binding. Set a wooden box to fit the waterproof sheet tightly, and then pour the frame beam concrete.

[0009] Step 2: construct the first part of the exterior wall masonry structure, and then build the second part after the settlement and shrinkage of the first part stabilizes;

[0010] Step 3: Remove the wooden box preset in the frame beam and peel off the embedded waterproof sheet to expose it;

[0011] Step 4: Extend the waterproof sheet to cover the crack area between the exterior wall and the frame beam. The extended waterproof sheet and the embedded waterproof sheet are connected with screws.

[0012] Step 5: Use grouting material to seal the groove in the waterproof sheet section area;

[0013] Step 6: Apply the mesh mortar layer and exterior wall decoration layer in sequence according to the construction procedures.

[0014] Furthermore, the waterproof sheet is made of 0.8mm galvanized iron sheet and fixed to the lower half of the frame beam reinforcement. The length of the fixed end of the frame beam reinforcement is 10cm and the bending angle is 135°.

[0015] Furthermore, the wooden box is made of formwork wooden blocks, and its cross-section is an isosceles trapezoid with a top angle of 135°. It is tightly attached to the waterproof sheet section and fixed to the beam side formwork.

[0016] Furthermore, the waterproof sheet extension section is arranged at the lower part of the embedded waterproof sheet section.

[0017] Furthermore, the screw connection method adopts a self-tapping screw fixing method, and a water-swelling rubber water-stop gasket is arranged under the self-tapping screw. The gap at the connection between the tapping screw, the water-swelling rubber water-stop gasket and the waterproof sheet is sealed with a weather-resistant sealant to prevent leakage at the thin plate connection position.

[0018] Furthermore, the grouting material used is a micro-expansion high-strength grouting material, and the strength of the grouting material is 2 grades higher than the strength of the frame beam. During filling, ensure that the grouting material is filled densely without cavities.

[0019] The waterproof structure and construction method for cracks between the masonry structure exterior wall and the frame beam proposed in the present invention have shown significant technical effects in effectively preventing water leakage from settlement cracks, which are specifically reflected in the following aspects:

[0020] 1. Significantly improve waterproof performance:

[0021] By pre-embedding the waterproof sheet during the construction of the frame beam and firmly fixing it to the frame beam steel bars, a solid waterproof barrier is formed. The waterproof sheet is made of 0.8mm thick galvanized iron sheet, which has high strength and corrosion resistance and can effectively resist the penetration of external moisture.

[0022] The extended section of the waterproof sheet is connected to the embedded section with screws, and a water-swelling rubber water-stop gasket and a weather-resistant sealant are set at the connection to further enhance the waterproof effect and ensure the sealing of the connection.

[0023] 2. Optimize construction process:

[0024] The construction method of the present invention closely combines waterproofing treatment with structural construction, avoids the problem of separation of the waterproof layer and the structural layer in the traditional method, simplifies the construction process, and improves construction efficiency.

[0025] 3. Enhance useful performance:

[0026] The construction method of the waterproof structure of the present invention not only solves the problem of water leakage, but also improves the overall quality and service life of the building. By optimizing the waterproof design and construction process, the building is made safer and more reliable, meeting the user's demand for building quality and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of pre-embedding a waterproof sheet in the construction method of the present invention;

[0028] Figure 2 It is a schematic diagram of the chiseling and connection of the waterproof sheet in the construction method of the present invention;

[0029] Figure 3 It is a schematic diagram of the construction completion surface of the construction method of the present invention;

[0030] Figure 4 It is an enlarged view of the A part of the schematic diagram of the waterproof sheet chiseling and connection;

[0031] Figure 5 It is the enlarged view of part A and part B in the schematic diagram of the waterproof sheet chiseling connection;

[0032] Figure 6 It is the right side view of the enlarged view of part B in the enlarged view of part A of the schematic diagram of the chiseling connection of the waterproof sheet;

[0033] In the figure: 1: embedded section of waterproof sheet, 2: extended section of waterproof sheet, 3: self-tapping screws, 4: frame beam, 5: rear part of brick wall, 6: first part of brick wall, 7: crack, 8: slightly expanding high-strength grouting material, 9: mesh mortar layer, 10: frame beam steel bar, 11: water-expanding rubber gasket, 12: weather-resistant sealant, 13: exterior wall decoration layer, 14: wooden box. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific embodiments:

[0035] like Figures 1 to 6 As shown, a construction method of a crack waterproof structure between a masonry structure exterior wall and a frame beam of the present invention comprises the following steps:

[0036] The first step is to construct a concrete frame structure. When constructing the frame beam, fix the embedded waterproof sheet section 1 on the beam reinforcement 10 by welding, binding, etc., set a wooden box 14 to fit closely with the embedded waterproof sheet section 1, and then pour the frame beam 4 concrete.

[0037] Step 2: construct the exterior wall masonry structure by first building the part 6, and then build the second building part 5 after the settlement and shrinkage of the first building part 6 stabilize.

[0038] Step 3: Remove the wooden box 14 preset in the frame beam, and peel off the embedded section 1 of the waterproof sheet to expose it to the outside.

[0039] Step 4: Extend the waterproof sheet section 2 and cover the crack 7 area between the exterior wall and the frame beam. The waterproof sheet section 2 and the embedded waterproof sheet section 1 are connected by screws.

[0040] Step 5: Use grouting material to seal the groove in the embedded section 1 area of ​​the waterproof sheet.

[0041] Step 6: Apply the mesh mortar layer 9 and the exterior wall decoration layer 13 in sequence according to the construction procedures.

[0042] Preferably, the waterproof sheet is made of 0.8 mm galvanized iron sheet, fixed to the lower half of the frame beam reinforcement 10, with a fixed section length of 10 cm and a bending angle of 135°.

[0043] Preferably, the wooden box 14 is made of template wooden blocks, has an isosceles trapezoidal cross-section, and has a top angle of 135°. It is closely attached to the embedded waterproof sheet section 1 and fixed to the beam side formwork.

[0044] Preferably, the waterproof sheet extension section 2 is arranged at the lower part of the waterproof sheet embedded section 1 .

[0045] Preferably, the screw connection method is a self-tapping screw 3 fixing method, and a water-swellable rubber waterproof gasket 11 is arranged under the self-tapping screw 3. The gap at the connection between the self-tapping screw 3, the water-swellable rubber waterproof gasket 11 and the waterproof sheet is sealed with a weather-resistant sealant 12 to prevent leakage at the connection position of the waterproof sheets 1 and 2.

[0046] Preferably, the grouting material is a micro-expansion high-strength grouting material 8, and the strength of the grouting material is 2 levels higher than the concrete strength of the frame beam 4. During filling, ensure that the grouting material is filled densely without cavities.

Claims

1. A construction method for waterproofing a crack between an outer wall of a masonry structure and a frame beam, characterized in that: The following steps are involved: Step 1: Construct a concrete frame structure. When constructing the frame beam, fix the embedded section of the waterproof sheet on the beam reinforcement by welding and binding. Set a wooden box to fit the waterproof sheet tightly, and then pour the frame beam concrete. Step 2: construct the first part of the exterior wall masonry structure, and then build the second part after the settlement and shrinkage of the first part stabilizes; Step 3: Remove the wooden box preset in the frame beam and peel off the embedded waterproof sheet to expose it; Step 4: Extend the waterproof sheet to cover the crack area between the exterior wall and the frame beam. The extended waterproof sheet and the embedded waterproof sheet are connected with screws. Step 5: Use grouting material to seal the groove in the waterproof sheet section area; Step 6: Apply the mesh mortar layer and exterior wall decoration layer in sequence according to the construction procedures.

2. The construction method of the waterproof structure for cracks between the masonry structure exterior wall and the frame beam according to claim 1 is characterized by: The waterproof sheet is made of 0.8mm galvanized iron sheet and is fixed to the lower half of the frame beam reinforcement. The length of the fixed end of the frame beam reinforcement is 10cm and the bending angle is 135°.

3. The construction method of the waterproof structure for cracks between the masonry structure exterior wall and the frame beam according to claim 1, characterized in that: The wooden box is made of formwork wood and has an isosceles trapezoidal cross-section with a top angle of 135°. It is tightly attached to the waterproof thin plate section and fixed to the beam side formwork.

4. The construction method of the waterproof structure for cracks between the masonry structure exterior wall and the frame beam according to claim 1, characterized in that: The waterproof sheet extension section is arranged at the lower part of the embedded waterproof sheet section.

5. The construction method of the waterproof structure for cracks between the masonry structure exterior wall and the frame beam according to claim 1, characterized in that: The screw connection method adopts self-tapping screw fixing method. A water-swelling rubber water-stop gasket is arranged under the self-tapping screw. The gap at the connection between the tapping screw, the water-swelling rubber water-stop gasket and the waterproof sheet is sealed with weather-resistant sealant to prevent leakage at the connection position of the sheet.

6. The construction method of the waterproof structure for cracks between the masonry structure exterior wall and the frame beam according to claim 1, characterized in that: The grouting material used is micro-expansion high-strength grouting material. The strength of the grouting material is 2 grades higher than the strength of the frame beam. During filling, ensure that the grouting material is filled densely without cavities.

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