A post-pouring reinforced belt structure
By using an I-shaped post-cast strip structure and a supporting wire mesh bag, the problem of easy deformation and damage of the wire mesh was solved, achieving formwork-free and efficient construction, and improving construction quality and progress.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN SHIGU TECHNOLOGY ENGINEERING CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-02
AI Technical Summary
In traditional post-pouring strip construction, the wire mesh is prone to deformation and damage, causing concrete to flow out, affecting construction progress and quality, and the demolding process is cumbersome.
The structure adopts a formwork-free post-cast reinforcement strip structure, including an I-shaped post-cast strip, a wire mesh bag, a fiber mesh, and a waterstop strip. The wire mesh bag is supported by horizontal and vertical steel wires, and the fiber mesh is tightly bonded to the concrete to increase structural stability and water-stopping effect.
This allows for construction without removing the wire mesh, enhancing structural integrity, reducing the risk of cracking and leakage, and improving construction efficiency and quality.
Smart Images
Figure CN224314385U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of post-pouring strip technology, specifically to a post-pouring reinforcement strip structure that does not require demolding. Background Technology
[0002] In building construction, to prevent harmful cracks that may occur in reinforced concrete structures due to uneven shrinkage or settlement, concrete post-pouring strips are left at corresponding positions in the base slab, walls, and beams. Traditionally, the pouring process for these post-pouring strips requires the fabrication of pouring templates, followed by a curing period before demolding, making the construction process quite cumbersome. Therefore, in existing technologies, wire mesh is fixed to the upper and lower layers of reinforcing steel on both sides of the post-pouring strip along its longitudinal direction to intercept the concrete, eliminating the need to remove the wire mesh after pouring. However, in actual use, there are instances where the intercepting wire mesh cannot withstand the lateral pressure during concrete pouring, resulting in deformation or damage, causing concrete to still flow out. This leads to time-consuming and labor-intensive cleanup later, which is detrimental to further ensuring construction progress and quality. Utility Model Content
[0003] The purpose of this utility model is to overcome the above-mentioned defects or problems in the background art and provide a post-cast reinforcement strip structure that does not require demolding.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A post-cast reinforcement strip structure without formwork removal includes structural slabs, with a post-cast strip reserved between adjacent structural slabs. The sidewall of the post-cast strip has two side extensions, making the cross-section of the post-cast strip I-shaped. A wire mesh bag is arranged between the post-cast strip and the structural slab. The wire mesh bag has a bent mesh bag part corresponding to the side extension. A main mesh bag is arranged between the two bent mesh bag parts. Fiber mesh is arranged inside the bent mesh bag part and the main mesh bag on the lower side. Waterstop strips are arranged on both sides of the bent mesh bag part on the upper side. Several horizontal steel wires are arranged in the main mesh bag and the bent mesh bag part. Any horizontal steel wire is arranged at the connection between the main mesh bag and the bent mesh bag part. Several vertical steel wires are connected between the horizontal steel wires. Several connecting steel bars are passed through the post-cast strip. Several vertical steel bars are arranged between the connecting steel bars on the upper side and the connecting steel bars on the lower side. The wire mesh bag has through-holes corresponding to the connecting steel bars.
[0006] In some embodiments of this utility model, the thickness of the side protrusion is 0.05-0.25 times the thickness of the post-cast strip, and the protrusion length of the side protrusion is 0.05-0.15 times the width of the post-cast strip.
[0007] In some embodiments of this utility model, the extension length of the lower bent mesh pocket is less than the extension length of the upper bent mesh pocket.
[0008] In some embodiments of this utility model, the bent mesh bag portion is provided with a recess, which is located on one side of the waterstop strip and parallel to the waterstop strip.
[0009] In some embodiments of this utility model, the arrangement spacing between adjacent vertical ribs is 5-50cm, and the arrangement distance between adjacent vertical steel wires is 5-20cm.
[0010] In some embodiments of this utility model, the connecting steel bars include upper steel bars, and the lower side of the upper steel bars is set as lower steel bars. The upper steel bars and the lower steel bars are respectively connected to the corresponding bottom steel bars in the structural slab.
[0011] In some embodiments of this utility model, the waterstop strip is bonded to both sides of the bent mesh pocket, and the arrangement direction of the waterstop strip is parallel to the horizontal steel wire.
[0012] In some embodiments of this utility model, both the horizontal and vertical steel wires are arranged on the outside of the wire mesh bag.
[0013] In some embodiments of this utility model, the mesh size of the wire mesh bag is smaller than that of the reinforcing mesh, and the mesh size of the fiber mesh is smaller than that of the wire mesh bag.
[0014] In some embodiments of this utility model, the connecting steel bar is provided with a binding member, the binding member including a U-shaped flexible strip, a plurality of connecting wires are evenly distributed on one side of the U-shaped flexible strip, the two sides of the U-shaped flexible strip are arranged crosswise, and the connecting wires pass through the wire mesh holes of the wire mesh bag.
[0015] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:
[0016] 1. A wire mesh bag is arranged between the post-pouring strip and the structural slab. The wire mesh bag does not need to be removed after the pouring construction, which is convenient and achieves formwork removal-free construction. The horizontal and vertical steel wires on the outside play a supporting role for the wire mesh bag, making the wire mesh bag less prone to deformation and damage during installation and concrete pouring, maintaining the shape stability of the wire mesh bag, and ensuring construction progress and construction quality.
[0017] 2. The I-shaped post-cast strip increases the contact area between the post-cast strip and the structural slab, which helps to distribute stress more evenly to the main structure on both sides, enhances the overall structure and shear resistance, and reduces the possibility of cracking in the later stage. At the same time, the side extension effectively reduces the vertical displacement between the post-cast strip and the structural slab, which effectively reduces cracking caused by uneven settlement in the later stage.
[0018] 3. Water-stop strips are arranged on both sides of the bent mesh bag. The water-stop strips, together with the bent mesh bag and the recess, help to reduce the probability of leakage and enhance the water-stopping effect.
[0019] 4. The inside of the wire mesh bag is lined with fiber mesh, which can fit tightly with the concrete surface. Especially in the initial setting stage of concrete, it helps to resist surface shrinkage cracks and maintain the integrity of the bonding surface. At the same time, the mesh of the fiber mesh is finer, which, together with the wire mesh bag, helps to further reduce the leakage of concrete slurry during pouring. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 For the present utility model Figure 1 Enlarged view of point A;
[0023] Figure 3 This is a schematic diagram of the wire mesh bag of this utility model;
[0024] Explanation of key figure labels:
[0025] 1. Structural slab; 10. Upper reinforcement; 11. Lower reinforcement; 12. Vertical reinforcement; 13. Binding piece; 14. U-shaped flexible strip; 15. Connecting wire; 2. Post-cast strip; 20. Side extension; 3. Wire mesh bag; 30. Through-reinforcement mesh; 31. Bending mesh bag section; 32. Main mesh bag; 33. Horizontal steel wire; 34. Vertical steel wire; 35. Recess; 36. Fiber mesh; 4. Waterstop strip. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0027] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.
[0028] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.
[0029] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.
[0030] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".
[0031] Example 1, see Figure 1-3 :
[0032] A formwork-free post-cast reinforcement strip structure includes a structural slab 1 and a post-cast strip 2. The post-cast strip 2 is reserved between adjacent structural slabs 1. A wire mesh bag 3 is arranged between the post-cast strip 2 and the structural slab 1. During construction, the wire mesh bag 3 is arranged first, and then the concrete is poured. After pouring, the wire mesh bag 3 does not need to be removed, thus achieving formwork-free construction.
[0033] The post-cast strip 2 is provided with several connecting steel bars, and several vertical bars 12 are arranged between the connecting steel bars on the upper side and the connecting steel bars on the lower side; preferably, the connecting steel bars include upper steel bars 10, and lower steel bars 11 are set below the upper steel bars 10. Several vertical bars 12 are arranged between the upper steel bars 10 and the lower steel bars 11. The upper steel bars 10 are connected to the corresponding top reinforcement bars in the structural slab 1, and the lower steel bars 11 are connected to the corresponding bottom reinforcement bars in the structural slab 1. The wire mesh bag 3 is provided with through-hole mesh 30 corresponding to the upper steel bars 10 and the lower steel bars 11; it can be understood that the steel bars are connected by binding or welding.
[0034] In one implementation, the spacing between adjacent vertical ribs 12 is 5-50cm.
[0035] The sidewall of the post-cast strip 2 is provided with two side protrusions 20, making the cross-section of the post-cast strip 2 I-shaped. It can be understood that the I-shaped post-cast strip 2 increases the contact area between the post-cast strip 2 and the structural plate 1, which helps to distribute the stress more evenly to the main structure on both sides, thereby reducing cracking caused by excessive local stress.
[0036] The wire mesh bag 3 is provided with a bent mesh bag section 31 corresponding to the side protrusion 20, and the main mesh bag 32 is arranged between two bent mesh bag sections 31. The main mesh bag 32 and the bent mesh bag section 31 are provided with a number of horizontal steel wires 33. Any one of the horizontal steel wires 33 is arranged at the connection between the main mesh bag 32 and the bent mesh bag section 31. A number of vertical steel wires 34 are connected between the horizontal steel wires 33. The horizontal steel wires 33 and the vertical steel wires 34 provide support for the wire mesh bag 3, so that the wire mesh bag 3 is not easily deformed or damaged during installation and concrete pouring, and the poured concrete will not flow out.
[0037] In one embodiment, the mesh opening of the wire mesh bag 3 is smaller than the mesh opening of the reinforcing mesh 30; the reinforcing mesh 30 is arranged in the main mesh bag 32.
[0038] In one embodiment, the horizontal steel wires 33 and vertical steel wires 34 are both arranged on the outside of the wire mesh bag 3. When concrete is poured, the lateral pressure of the concrete acts on the wire mesh bag 3, and the outer horizontal steel wires 33 and vertical steel wires 34 provide rigid support, effectively resisting the impact of concrete pouring and maintaining the shape stability of the wire mesh bag 3. It is understood that the horizontal steel wires 33, vertical steel wires 34, and wire mesh bag 3 are connected by welding; the vertical steel wires 34 can be made by welding multiple short steel wires in sequence; in other embodiments, the horizontal steel wires 33 and vertical steel wires 34 are both arranged on the inside of the wire mesh bag 3.
[0039] In one implementation, the arrangement distance between adjacent vertical steel wires 34 is 5-20cm.
[0040] In one embodiment, the thickness of the side protrusion 20 is 0.05-0.25 times the thickness of the post-pouring strip 2, and the protrusion length of the side protrusion 20 is 0.05-0.15 times the width of the post-pouring strip 2.
[0041] In one embodiment, the extension length of the lower bent mesh pocket 31 is less than the extension length of the upper bent mesh pocket 31, which facilitates the rapid filling of concrete to the bottom corner during pouring.
[0042] In one embodiment, water-stop strips 4 are arranged on both sides of the wire mesh bag 3. The water-stop strips 4 are arranged on both sides of the upper bent mesh bag portion 31, and the arrangement direction of the water-stop strips 4 is parallel to the horizontal steel wire 33. It can be understood that there are two water-stop strips 4, which are respectively bonded to both sides of the bent mesh bag portion 31. The water-stop strips 4, in conjunction with the bent mesh bag portion 31, help to reduce the probability of leakage and enhance the water-stopping effect.
[0043] In one embodiment, the bent mesh pocket 31 is provided with a recess 35, which is located on one side of the waterstop strip 4 and parallel to the waterstop strip 4. The recess 35 helps to increase the seepage resistance and path length, reduce the probability of leakage, and improve the reliability of waterproofing.
[0044] In one implementation, a fiber mesh 36 is arranged inside the lower bent mesh pocket 31 and the main mesh pocket 32. The mesh size of the fiber mesh 36 is smaller than that of the wire mesh pocket 3. It is understood that the fiber mesh 36 has rebar holes corresponding to the through-reinforcement mesh holes 30. During pouring, the concrete slurry poured to the bottom experiences significant pressure, and the fiber mesh 36, in conjunction with the wire mesh pocket 3, helps to further reduce concrete slurry leakage during pouring.
[0045] In one embodiment, a binding member 13 is arranged on the connecting steel bar. The binding member 13 includes a U-shaped flexible strip 14, with several connecting wires 15 evenly distributed on one side of the U-shaped flexible strip 14. The connecting steel bar passes through the inside of the opening of the U-shaped flexible strip 14, and the two sides of the U-shaped flexible strip 14 are bent at an angle. The connecting wires 15 pass through the mesh holes of the wire mesh bag 3. During installation, the opening of the U-shaped flexible strip 14 faces the connecting steel bar, the connecting steel bar passes through the inside of the opening of the U-shaped flexible strip 14, the two sides of the U-shaped flexible strip 14 are bent at an angle and wrapped and fixed, and the connecting wires 15 pass through the fiber mesh 36 and the mesh holes of the wire mesh bag 3. The connecting wires 15 are bent and arranged on one side of the wire mesh bag 3, and the ends of the connecting wires 15 are wrapped and fixed together. Preferably, the width of the U-shaped flexible strip 14 is 2-4 times the diameter of the connecting wires 15, which facilitates fitting onto the connecting steel bar. The connecting wires 15 are iron wires, and the U-shaped flexible strip 14 is an iron strip, which is easy to bend. It is understandable that there are 2-4 connecting wires 15, which are welded to the U-shaped flexible strip 14. The diameter of the connecting wire 15 is not greater than the mesh aperture of the fiber web 36.
[0046] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.
Claims
1. A post-cast reinforcement strip structure that does not require demolding, characterized in that: The structure includes a structural slab (1), with a post-cast strip (2) reserved between adjacent structural slabs (1). The sidewall of the post-cast strip (2) has two side extensions (20) and the cross-section of the post-cast strip (2) is I-shaped. A wire mesh bag (3) is arranged between the post-cast strip (2) and the structural slab (1). The wire mesh bag (3) has a bent mesh bag part (31) corresponding to the side extension (20). A main mesh bag (32) is arranged between the two bent mesh bag parts (31). A fiber mesh (36) is arranged inside the bent mesh bag part (31) and the main mesh bag (32) located on the lower side. Waterstop strips (4) are arranged on both sides of the upper bent mesh bag (31). Several horizontal steel wires (33) are arranged in the main mesh bag (32) and the bent mesh bag (31). Any horizontal steel wire (33) is arranged at the connection between the main mesh bag (32) and the bent mesh bag (31). Several vertical steel wires (34) are connected between the horizontal steel wires (33). Several connecting steel bars are inserted in the post-cast strip (2). Several vertical steel bars (12) are arranged between the connecting steel bars located on the upper side and the connecting steel bars located on the lower side. The wire mesh bag (3) is provided with through-reinforcement mesh holes (30) corresponding to the connecting steel bars.
2. The post-cast reinforcement strip structure without demolding according to claim 1, characterized in that: The thickness of the side extension (20) is 0.05-0.25 times the thickness of the post-pouring strip (2), and the extension length of the side extension (20) is 0.05-0.15 times the width of the post-pouring strip (2).
3. The post-cast reinforcement strip structure without demolding according to claim 2, characterized in that: The extension length of the lower bent mesh pocket (31) is less than the extension length of the upper bent mesh pocket (31).
4. The post-cast reinforcement strip structure without demolding according to claim 1, characterized in that: The bent mesh pocket (31) is provided with a recess, which is located on one side of the waterstop strip (4) and parallel to the waterstop strip (4).
5. The post-cast reinforcement strip structure without demolding according to claim 1, characterized in that: The spacing between adjacent vertical bars (12) is 5-50cm, and the spacing between adjacent vertical wires (34) is 5-20cm.
6. The post-cast reinforcement strip structure without demolding according to claim 1, characterized in that: The connecting steel bars include upper steel bars (10), and the lower side of the upper steel bars (10) is set as lower steel bars (11). The upper steel bars (10) and the lower steel bars (11) are respectively connected to the corresponding bottom steel bars in the structural slab (1).
7. The post-cast reinforcement strip structure without demolding according to claim 1, characterized in that: The waterstop strip (4) is bonded to both sides of the bent mesh pocket (31), and the arrangement direction of the waterstop strip (4) is parallel to the horizontal steel wire (33).
8. The post-cast reinforcement strip structure without demolding according to claim 1, characterized in that: The horizontal steel wire (33) and the vertical steel wire (34) are both arranged on the outside of the wire mesh bag (3).
9. A post-cast reinforcement strip structure without demolding according to any one of claims 1-8, characterized in that: The mesh size of the wire mesh bag (3) is smaller than that of the reinforcing mesh (30), and the mesh size of the fiber mesh (36) is smaller than that of the wire mesh bag (3).
10. A post-cast reinforcement strip structure without demolding according to claim 9, characterized in that: The connecting steel bar is provided with a binding member (13), the binding member (13) includes a U-shaped soft strip (14), a number of connecting wires (15) are evenly distributed on one side of the U-shaped soft strip (14), the two sides of the U-shaped soft strip (14) are arranged crosswise, and the connecting wires (15) pass through the wire mesh holes of the wire mesh bag (3).