Prefabricated cover plate construction structure for closing post-cast strip of building outer wall in advance

Abstract

A prefabricated cover plate construction structure for closing a post-cast strip of a building outer wall in advance belongs to the technical field of building construction and comprises a basement outer wall, the post-cast strip is arranged in the basement outer wall and is closed through prefabricated cover plates stacked up and down, and a gap between the upper prefabricated cover plate and the lower prefabricated cover plate is leveled through waterproof mortar bedding. The joint of the wall face of the basement outer wall and the prefabricated cover plate is plastered to form a 45-degree oblique angle to form a sealing block, and waterproof layers are arranged among the basement outer wall, the sealing block and the outer side of the prefabricated cover plate for sealing. The basement post-cast strip sealing structure solves the problems that a basement post-cast strip is sealed in a brick mould building mode, the leakage problem of the post-cast strip is difficult to eradicate, and the forming quality problems of concrete mould bulging, slag inclusion and the like caused by insufficient strength of a brick mould are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and in particular relates to a prefabricated cover plate construction structure used for early sealing of post-cast strips of building exterior walls. Background Art

[0002] In the existing technology, the basement post-cast joint is generally closed in advance by building brick molds, specifically by using bricks to build a 240mm protective wall, applying waterproof mortar on the outside, and sticking waterproof membrane on the outside for early sealing. Through investigation of actual projects, it was found that closing the post-cast joint after the settlement is stable is not conducive to the implementation of the basement exterior wall waterproofing process and the timely backfilling of the foundation pit fertilizer trough, which means that some defects that could have been improved cannot be effectively dealt with. It is difficult to eliminate the leakage problem at the post-cast joint and the molding quality problems such as concrete bulging and slag inclusion caused by insufficient strength of the brick membrane itself by closing the basement post-cast joint by building brick membrane. Utility Model Content

[0003] The purpose of the utility model is to provide a prefabricated cover construction structure for early closing of the post-cast strips of building exterior walls, so as to solve the problem that it is difficult to prevent leakage at the post-cast strips of the basement by using the method of building brick membranes, and the problems of concrete bulging, slag inclusion and other molding quality problems caused by insufficient strength of the brick membranes themselves.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A prefabricated cover plate construction structure for early sealing of post-cast strips on building exterior walls comprises an exterior wall of a basement, wherein an interior post-cast strip is provided on the exterior wall of the basement, the post-cast strip is sealed by stacked prefabricated cover plates, the gap between the upper and lower prefabricated cover plates is leveled by waterproof mortar, the junction between the wall surface of the exterior wall of the basement and the prefabricated cover plate is smoothed at a 45° angle to form a closed block, and a waterproof layer is provided between the exterior wall of the basement, the closed block and the outer side of the prefabricated cover plate for sealing.

[0006] The precast cover plate is a rectangular block cast by concrete; it includes an upper steel mesh and a lower steel mesh cast in the concrete and arranged horizontally and fully, connecting steel bars arranged vertically at the four corners, the connecting steel bars are L-shaped, the horizontal part is located in the precast cover plate, and the vertical part extends out of the precast cover plate, and the end of the vertical part is hook-shaped, and the hook-shaped part is hooked and connected with the main reinforcement of the post-cast zone; a pair of lifting rings are provided between the upper steel mesh and the lower steel mesh.

[0007] A further preferred technical solution: the length*width*thickness of the prefabricated cover plate is 1300*500*100mm.

[0008] Further preferred technical solution: the concrete specification of the prefabricated cover plate is C35.

[0009] A further preferred technical solution: the specifications of the upper steel mesh and the lower steel mesh are HRB400φ10mm.

[0010] A further preferred technical solution: the specification of the connecting steel bars is HRB400φ10mm.

[0011] A further preferred technical solution: the specification of the lifting ring is HPB300φ10mm.

[0012] A further preferred technical solution is as follows: the lifting ring is U-shaped, the top arc portion of the U-shape is located outside the prefabricated cover plate, and the two bottom ends of the U-shape are bent horizontally outwards.

[0013] A further preferred technical solution: the thickness of the waterproof mortar is 2 cm.

[0014] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0015] The utility model adopts connecting steel bars arranged on precast concrete blocks to be tied to the main reinforcement of the wall. After the concrete of the post-cast strip is poured, it can be firmly connected to the structural wall surface. It will not cause cracking and waterproofing cracking due to backfill settlement, insufficient lateral pressure of backfill soil, etc., thereby greatly improving the construction quality of the waterproofing of the post-cast strip.

[0016] The utility model adopts prefabrication as the assembled prefabricated cover plate protection wall, which shortens the construction period of the post-casting zone to a certain extent.

[0017] The prefabricated cover plate of the utility model can be made of on-site concrete waste, masonry waste, etc., and the reinforcement can also be processed with on-site waste, which greatly improves the economic benefits and makes great contributions to improving quality control and secondary utilization of on-site waste steel bars. The construction method is simple and easy to operate, meeting the requirements of green construction advocated by the country. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a plan view of the prefabricated cover plate of the utility model;

[0019] Figure 2 This utility model Figure 1 Section 1-1 in the figure;

[0020] Figure 3 This is a plan view of the prefabricated cover plate construction structure for sealing the post-cast strip of the building exterior wall in advance according to the utility model;

[0021] Figure 4 This is an elevation view of a prefabricated cover plate construction structure for sealing the post-cast strip of a building exterior wall in advance according to the utility model;

[0022] Reference numerals: 1—post-cast strip, 2—prefabricated cover plate, 3—basement exterior wall, 4—closure block, 5—waterproof layer, 6—waterproof mortar,

[0023] 1.1—Main reinforcement of post-cast zone,

[0024] 2.1—Upper steel mesh, 2.2—Lower steel mesh, 2.3—Connecting steel bars, 2.4—Lifting rings, 2.5—Concrete. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1 to 4 As shown, the utility model is a prefabricated cover plate construction structure for early sealing of the post-cast strip of the building exterior wall, comprising a basement exterior wall 3, a post-cast strip 1 being provided inside the basement exterior wall 3, the position of the post-cast strip 1 being sealed by prefabricated cover plates 2 stacked up and down, the gap between the upper and lower prefabricated cover plates 2 being leveled by 2 cm waterproof mortar 6, the junction between the wall surface of the basement exterior wall 3 and the prefabricated cover plate 2 being smoothed at a 45° angle to form a closing block 4, and a waterproof layer 5 being provided between the basement exterior wall 3, the closing block 4 and the outer side of the prefabricated cover plate 2 for sealing.

[0027] The prefabricated cover plate 2 is a rectangular block with a length * width * thickness of 1300 * 500 * 100 mm, and is cast by concrete 2.5 of specification C35; it includes an upper steel mesh 2.1 and a lower steel mesh 2.2 cast in the concrete and arranged horizontally and fully, and the specifications of the upper steel mesh 2.1 and the lower steel mesh 2.2 are HRB400φ10mm, and connecting steel bars 2.3 are vertically arranged at the four corners, and the specifications of the connecting steel bars 2.3 are HRB400φ10mm, and the connecting steel bars 2.3 are L-shaped, with the horizontal part Located inside the precast cover plate, the vertical part extends out of the precast cover plate, and the end of the vertical part is hook-shaped, and the hook-shaped part is hooked and tied to the main reinforcement 1.1 of the post-cast strip. A pair of lifting rings 2.4 are arranged between the upper steel mesh 2.1 and the lower steel mesh 2.2. The specification of the lifting ring 2.4 is HPB300φ10mm, and the lifting ring 2.4 is U-shaped. The top arc part of the U-shape is located outside the precast cover plate, which is convenient for lifting and moving the precast cover plate. The two bottom ends of the U-shape are bent outward horizontally to enhance the grip between the lifting ring 2.4 and the concrete.

[0028] The utility model is designed in combination with the actual situation on site and after rigorous theoretical calculation, to replace the brick protective wall with a prefabricated cover plate, to seal the basement post-cast zone through pre-formed reinforced concrete components, and to backfill the foundation pit in advance, thus saving land.

[0029] The use of prefabricated cover plates to seal the basement exterior wall post-cast joints in advance provides a more favorable base surface for waterproofing construction. The waterproofing construction effect is good. No deformation, cracking or water seepage is observed after backfilling, and the implementation effect is good.

[0030] Comparison between the prior art method of closing the exterior wall post-casting strip by brick masonry and the utility model method of closing the exterior wall post-casting strip by prefabricated cover plate:

[0031] 1. Existing technology: Brick masonry closes the exterior wall post-casting strip in advance:

[0032] This approach may easily cause cracks in the protective wall and structural surface due to settlement of outdoor backfill soil or insufficient lateral pressure of backfill soil, or cause the waterproof membrane to tear due to settlement, posing a major risk to waterproofing quality.

[0033] Under the premise of daily masonry height restrictions, the construction period is long and the workload is greatly increased. Faced with the narrow distance between some supporting structures and the basement outer walls, it also brings many inconveniences to the construction.

[0034] 2. In this utility model, the prefabricated cover plate closes the exterior wall post-cast strip in advance:

[0035] By setting connecting steel bars on precast concrete blocks to tie with the main reinforcement of the wall, the post-cast strip concrete can be firmly connected to the structural wall after pouring, and will not cause cracking and waterproofing cracking due to backfill settlement, insufficient lateral pressure of backfill, etc., which greatly improves the quality of the post-cast strip waterproofing construction.

[0036] Moreover, the prefabricated protective wall shortens the construction period of the post-pouring strip to a certain extent.

[0037] Prefabricated cover plates can be made from on-site concrete waste, masonry waste, etc., and reinforcement can also be processed from on-site waste, which greatly improves economic benefits and makes great contributions to improving quality control and the secondary utilization of on-site waste steel bars. Its construction method is simple and easy to operate, meeting the requirements of green construction advocated by the country.

[0038] The working process of the prefabricated cover plate construction structure used in the utility model for early sealing of the post-cast strip of the building exterior wall is as follows:

[0039] 1. Install from the bottom plate upwards, first place the bottom prefabricated cover plate 2 on the post-casting strip through the lifting ring 2.4, and seal the post-casting strip. Cut off the lifting ring after the prefabricated cover plate is hoisted.

[0040] 2. Then use waterproof mortar to level it and then hoist a prefabricated cover plate on top.

[0041] 3. Repeat steps 1 and 2 until all prefabricated cover panels are hoisted.

[0042] 4. Connect the φ10 connecting steel bars embedded in the prefabricated cover plate with the main reinforcement 1.1 of the post-cast strip, and use waterproof mortar to smooth the junction of the concrete and the basement outer wall into a 45° angle to form a closed block 4.

[0043] 5. Then apply waterproof layer 5 on the outside of the prefabricated cover plate to carry out waterproof construction.

[0044] 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 present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A prefabricated cover plate construction structure for early sealing of post-cast strips on building exterior walls, characterized by: The invention comprises a basement outer wall (3), a post-cast strip (1) is provided in the basement outer wall (3), the post-cast strip (1) is sealed by upper and lower stacked prefabricated cover plates (2), the gap between the upper and lower prefabricated cover plates (2) is leveled by waterproof mortar (6), the junction between the wall surface of the basement outer wall (3) and the prefabricated cover plate (2) is smeared at a 45° angle to form a closed block (4), and a waterproof layer (5) is provided between the basement outer wall (3), the closed block (4) and the outer side of the prefabricated cover plate (2) for sealing; The prefabricated cover plate (2) is a rectangular block, which is cast by concrete (2.5); it includes an upper steel mesh (2.1) and a lower steel mesh (2.2) which are horizontally and fully arranged in the concrete (2.5), and connecting steel bars (2.3) which are vertically arranged at the four corners. The connecting steel bars (2.3) are L-shaped, with the horizontal portion located in the prefabricated cover plate and the vertical portion extending out of the prefabricated cover plate. The end of the vertical portion is hook-shaped, and the hook-shaped portion is hooked and tied to the main reinforcement (1.1) of the post-cast strip; a pair of lifting rings (2.4) are arranged between the upper steel mesh (2.1) and the lower steel mesh (2.2).

2. The prefabricated cover plate construction structure for early sealing of post-cast strips of building exterior walls according to claim 1 is characterized in that: The length*width*thickness of the prefabricated cover plate (2) is 1300*500*100mm.

3. The prefabricated cover plate construction structure for early sealing of post-cast strips of building exterior walls according to claim 1 is characterized in that: The concrete (2.5) specification of the precast cover plate (2) is C35.

4. The prefabricated cover plate construction structure for early sealing of post-cast strips of building exterior walls according to claim 1 is characterized in that: The specifications of the upper steel mesh (2.1) and the lower steel mesh (2.2) are HRB400φ10mm.

5. The prefabricated cover plate construction structure for early sealing of post-cast strips of building exterior walls according to claim 1 is characterized in that: The specification of connecting steel bar (2.3) is HRB400φ10mm.

6. The prefabricated cover plate construction structure for early sealing of post-cast strips on building exterior walls according to claim 1 is characterized in that: The specification of the lifting ring (2.4) is HPB300φ10mm.

7. The prefabricated cover plate construction structure for early sealing of post-cast strips on building exterior walls according to claim 1 is characterized in that: The lifting ring (2.4) is U-shaped, the top arc portion of the U-shape is located outside the prefabricated cover plate, and the two bottom ends of the U-shape are bent horizontally outwards.

8. The prefabricated cover plate construction structure for early sealing of post-cast strips on building exterior walls according to claim 1 is characterized in that: The thickness of the waterproof mortar (6) is 2 cm.

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