An ultra-large plane concrete structure with anti-crack post-pouring belt

Abstract

This invention discloses an ultra-large planar concrete structure with crack-resistant post-cast strips. The key technical points are: it includes a structural body, with post-cast strips between adjacent structural bodies. Expansive concrete is poured into the post-cast strips. Several connecting blocks are provided at the connection points between the post-cast strips and the structural body on both sides. The connecting blocks are integrally cast with the structural body. A hollow frame for venting is provided within the post-cast strip. The hollow frame is formed by interconnecting several air inlet pipes, each with several air inlet holes. Tensile grooves are provided on the sides of the connecting blocks, and fixing slots are provided within the tensile grooves. The air inlet pipes on both sides of the hollow frame are obliquely inserted into the fixing slots of each tensile groove. An upward-facing exhaust pipe is provided at the intersection of several adjacent air inlet pipes of the hollow frame. A tensile plate is provided at the upper end of the hollow frame, and the exhaust pipe passes through the tensile plate. A supporting spring is provided between the tensile plate and the hollow frame, sleeved on the outer end of the exhaust pipe. One end of the supporting spring fixes the tensile plate, and the other end fixes the hollow frame.

Description

Technical Field

[0001] This invention relates to the field of construction, and more particularly to an ultra-large planar concrete structure with a crack-resistant post-cast strip. Background Technology

[0002] A post-cast strip is a concrete strip left at the corresponding position of the foundation slab, wall, or beam in the construction process to prevent harmful cracks that may occur in the reinforced concrete structure due to uneven shrinkage or settlement. This is done in accordance with the design or construction specifications.

[0003] Currently, with the development of buildings towards larger and more multifunctional structures, ultra-long or ultra-large planar buildings are constantly emerging, leading to a gradual increase in temperature shrinkage cracks that are prone to occur in ultra-long concrete structures. During the construction of ultra-long concrete structures, the temperature changes caused by the heat of hydration released during the hydration reaction of cement in large-volume concrete, combined with the shrinkage of concrete, generate significant temperature and shrinkage stresses, making structural cracks more likely. To reduce shrinkage cracking of concrete, post-pouring strips are often installed. However, there is a time difference between the concrete in the post-pouring strip and the concrete on both sides, making cracks more likely to appear between the post-pouring strip and the concrete on both sides. The appearance of cracks greatly reduces the safety of the building, thus posing a significant challenge to the shrinkage resistance of the post-pouring strip. Therefore, it is essential to design an ultra-large planar concrete structure with a post-pouring strip that has strong shrinkage resistance and is crack-resistant. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an ultra-large planar concrete structure with a crack-resistant post-pouring strip that has strong shrinkage resistance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This type of crack-resistant post-cast strip ultra-large planar concrete structure includes a structural body, with post-cast strips between adjacent structural bodies. Expansive concrete is poured into the post-cast strips. Several connecting blocks are provided at the connection points between the post-cast strips and the structural bodies on both sides. The connecting blocks are integrally cast with the structural body. A hollow frame for venting is provided within the post-cast strip. The hollow frame is formed by several interconnected air inlet pipes, each with several air inlet holes. Tensile grooves are provided on the sides of the connecting blocks, and fixing slots are provided within the tensile grooves. The air inlet pipes on both sides of the hollow frame are obliquely inserted into the fixing slots of each tensile groove. An upward-facing exhaust pipe is provided at the intersection of the adjacent air inlet pipes of the hollow frame. A tensile plate is provided at the upper end of the hollow frame, and the exhaust pipe passes through the tensile plate. A supporting spring is provided between the tensile plate and the hollow frame. The supporting spring is sleeved on the outer end of the exhaust pipe, with one end fixing the tensile plate and the other end fixing the hollow frame.

[0007] Furthermore, several transverse steel bars are inserted between adjacent structural bodies. These transverse steel bars are divided into two layers: one layer is set at the upper end of the tensile plate, and the other layer is set at the lower end of the hollow frame. Both the tensile plate and the hollow frame are tied and fixed to the transverse steel bars.

[0008] Furthermore, the connecting block is triangular prism shaped, and both the top and bottom surfaces of the connecting block are provided with a plurality of tensile strips, with concave grooves for anti-shrinkage formed between adjacent tensile strips.

[0009] Furthermore, the opening of the tensile groove is provided with a tensile mesh made of steel wire, and the tensile mesh is provided with an insertion port for the air intake pipe to be inserted. The insertion port is provided with a fixed slot, and the inner side of the tensile groove is provided with an L-shaped fixed groove for anti-shrinkage.

[0010] Furthermore, the opening of the tensile groove is provided with fixing seats on both sides, and the two ends of the tensile mesh are fixedly connected to the fixing seats by fasteners.

[0011] Furthermore, the hollow frame is composed of several air intake pipes connected together. One air intake pipe is integrated with a guide fixing pipe, and the inner hole of another air intake pipe is inserted along the guide fixing pipe. The air intake pipe and the guide fixing pipe are fixed by bolts, and a sealing ring is provided at the connection seam between the air intake pipe and the guide fixing pipe.

[0012] Furthermore, the air inlet pipes inserted into the fixing slots on both sides of the hollow frame are provided with casting holes.

[0013] Furthermore, both sidewalls of the connecting block are provided with tensile grooves and fixing slots, the tensile grooves on the two sidewalls are perpendicular to each other, and the fixing slots on the two sidewalls are perpendicular to each other.

[0014] The beneficial effects of this invention are:

[0015] 1. By setting up a hollow frame, tensile plate, vent pipe, support spring and transverse steel bar, after the expansion concrete is poured into the post-pouring strip, the support spring can resist the hollow frame and tensile plate. Therefore, the support spring resists the shrinkage force in the vertical direction. The hollow frame, as the overall planar support of the post-pouring strip, resists the shrinkage force in the horizontal direction, thereby achieving an overall anti-shrinkage effect. When the expansion concrete shrinks, it is resisted and will not crack with the structure. The hollow frame discharges the heat and gas generated in the hydration reaction of the expansion concrete, reducing cracks caused by air bubbles and temperature differences.

[0016] 2. By setting the connecting block, the contact area between the structural body and the post-cast strip expansive concrete is increased, making the connection tighter. With the setting of tensile mesh and L-shaped fixing groove, the expansive concrete is not easy to fall out of the tensile mesh and L-shaped fixing groove after pouring, which plays an anti-shrinkage effect and enhances the connection strength between the post-cast strip expansive concrete and the connecting block. Therefore, cracks are not easy to occur between the expansive concrete and the structural body.

[0017] 3. Since the hollow frame is assembled from several air inlet pipes, and the two sides of the hollow frame are inserted into the fixed slots through oblique air inlet pipes, the hollow frame forms a mesh support surface between the two structural bodies. The mesh support surface acts as a support and plays an anti-shrinkage role when the concrete shrinks. The setting of the oblique air inlet pipes inserted into the fixed slots connects the two structural bodies into one unit through the hollow frame. Moreover, the fixed slots on both sides of the same connecting block are perpendicular to each other. Therefore, when the expansive concrete shrinks from any angle, the air inlet pipe will be supported on the fixed slot, thereby reducing the shrinkage of the expansive concrete and reducing the generation of cracks. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the hollow frame and connecting block in this invention.

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0021] Figure 4 This is a schematic diagram of the planar structure between the two layers of transverse reinforcing bars in this invention;

[0022] Figure 5 This is a cross-sectional view of the intake pipe insertion structure in this invention;

[0023] Figure 6 This is a cross-sectional view of the air intake pipe inside the fixed slot in this invention.

[0024] Reference numerals in the attached drawings: 1. Structural body; 2. Post-cast strip; 3. Connecting block; 30. Tensile strip; 31. Tensile mesh; 32. Fixing seat; 33. L-shaped fixing groove; 34. Tensile groove; 35. Fixing slot; 4. Hollow frame; 40. Air inlet pipe; 41. Air inlet hole; 42. Exhaust pipe; 43. Guide fixing pipe; 44. Sealing ring; 45. Casting hole; 5. Transverse reinforcement; 6. Tensile plate; 7. Support spring. Detailed Implementation

[0025] 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.

[0026] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do 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. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or a point connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Reference Figure 1-6The working principle of this embodiment is as follows: The structural body 1 is provided with several connecting blocks 3, and the upper and lower surfaces of these connecting blocks 3 are provided with anti-shrinkage concave grooves. After the expansive concrete is poured into the concave grooves, the contact area between the expansive concrete in the post-pouring strip 2 and the structural body 1 is increased. When the expansive concrete shrinks, it has an anti-shrinkage effect, making the connection tighter and preventing cracks from forming between the expansive concrete and the structural body 1. Since the hollow frame 4 is assembled by inserting several air inlet pipes 40, and the two sides of the hollow frame 4 are inserted into the fixed slots 35 through oblique air inlet pipes 40, the hollow frame 4 is erected between the two structural bodies 1 to form a mesh. The supporting surface, a mesh-like supporting surface, acts as a support. When the concrete shrinks, it is supported by the hollow frame 4, making it less prone to shrinkage. Expansion concrete is poured into the hollow frame 4, which becomes a solid body, making it less susceptible to compression and shrinkage. Furthermore, the oblique air inlet pipe 40 is inserted into the fixing slot 35, connecting the two structural bodies 1 together through the hollow frame 4. The fixing slots 35 on both sides of the same connecting block 3 are perpendicular to each other. Therefore, no matter how the expansion concrete shrinks, the air inlet pipe 40 will always be supported against the fixing slot 35, resisting the shrinkage force. This reduces the shrinkage of the expansion concrete and decreases the generation of cracks between the structural body 1 and the post-cast strip 2. The arrangement of the hollow frame 4, tensile plate 6, vent pipe 42, support spring 7, and transverse steel reinforcement 5, after the expansive concrete is poured into the post-pouring strip 2, allows the support spring 7 to resist the vertical shrinkage force of the hollow frame 4 and tensile plate 6. The hollow frame 4, as the overall planar support of the post-pouring strip 2, resists the horizontal shrinkage force, thus achieving an overall anti-shrinkage effect. This prevents cracks from forming between the expansive concrete and the structural body 1 during shrinkage. The hollow frame 4 also allows the heat and gases generated during the hydration reaction of the expansive concrete to be discharged through the air intake, reducing cracks caused by air bubbles and temperature differences. After the expansion concrete of the post-pouring strip 2 is poured and vented, the hollow frame 4 is filled with expansion concrete through the venting pipe 42 to enhance the structural strength and shrinkage resistance of the hollow frame 4. The connection block 3 increases the contact area between the structural body 1 and the expansion concrete of the post-pouring strip 2, making the connection tighter. The tensile mesh 31 and L-shaped fixing groove 33 prevent the expansion concrete from easily falling out of the tensile mesh 31 and L-shaped fixing groove 33 after pouring, thus achieving the shrinkage resistance effect and enhancing the connection strength between the expansion concrete of the post-pouring strip 2 and the connection block 3. Therefore, cracks are less likely to occur between the expansion concrete and the structural body 1.

[0028] This type of crack-resistant post-cast strip ultra-large planar concrete structure includes a structural body 1, with post-cast strips 2 between adjacent structural bodies 1. Expansive concrete is poured into the post-cast strips 2. Several connecting blocks 3 are provided at the connection points between the post-cast strip 2 and the structural body 1 on both sides. The connecting blocks 3 are integrally cast with the structural body 1. A hollow frame 4 for venting is provided within the post-cast strip 2. The hollow frame 4 is formed by several interconnected air inlet pipes 40, each with several air inlet holes 41. Tensile grooves 3 are provided on the sides of the connecting blocks 3. 4. The tensile groove 34 is also provided with a fixing slot 35. The air inlet pipes 40 on both sides of the hollow frame 4 are respectively inserted obliquely into the fixing slots 35 of each tensile groove 34. The hollow frame 4 has an upward-facing exhaust pipe 42 at the intersection of several adjacent air inlet pipes 40. The hollow frame 4 has a tensile plate 6 at the upper end. The exhaust pipe 42 passes through the tensile plate 6. A support spring 7 is provided between the tensile plate 6 and the hollow frame 4. The support spring 7 is sleeved on the outer end of the exhaust pipe 42. One end of the support spring 7 fixes the tensile plate 6 and the other end fixes the hollow frame 4.

[0029] A support spring 7 is positioned between the tension plate 6 and the hollow frame 4. When the tension plate 6 and the hollow frame 4 are compressed inward due to the shrinkage of the expansive concrete, the support spring 7 pushes against them, reducing the shrinkage force. The support spring 7 also acts as a counterforce against the hollow frame 4 and the tension plate 6. Therefore, the support spring 7 resists the shrinkage force in the vertical direction. The hollow frame 4, as the overall planar support for the post-cast strip, resists the shrinkage force in the horizontal direction, thus achieving an overall anti-shrinkage effect. This prevents the expansive concrete from cracking with the structural body 1 when it shrinks.

[0030] The hollow frame 4 serves two purposes. First, it provides ventilation. Heat and gas generated during the hydration reaction of the expansive concrete enter the hollow frame 4 through the air inlet 41 and are then expelled through the exhaust pipe 42, reducing cracks caused by air bubbles and temperature differences. After the expansive concrete in the post-pouring strip 2 is poured and vented, the hollow frame 4 is filled with expansive concrete through the exhaust pipe 42, enhancing its structural strength and shrinkage resistance. Second, the hollow frame 4 is inserted into the fixing slot 35 through oblique air inlet pipes 40 on both sides, thus forming a mesh support between the two structural bodies 1. The mesh support surface acts as a support body. When the concrete shrinks, it is held in place by the hollow frame 4 and is not easily shrinking. Expansion concrete is poured into the hollow frame 4, which is a solid body and is not easily squeezed and shrinked. Furthermore, the two sides of the structural body 1 are connected by the hollow frame 4 through the setting of the inclined air inlet pipe 40 inserted into the fixed slot 35. Moreover, the fixed slots 35 on both sides of the same connecting block 3 are perpendicular to each other. Therefore, when the expansion concrete shrinks from any angle, the air inlet pipe 40 will be supported on the fixed slot 35, thereby reducing the shrinkage of the expansion concrete and reducing the generation of cracks between the expansion concrete and the structural body 1.

[0031] As an improved specific implementation, a number of transverse steel bars 5 are inserted between adjacent structural bodies 1. The number of transverse steel bars 5 are divided into two layers, one layer is set at the upper end of the tensile plate 6, and the other layer is set at the lower end of the hollow frame 4. The tensile plate 6 and the hollow frame 4 are both tied and fixed with the transverse steel bars 5.

[0032] The transverse reinforcing bars 5 fix the tension plate 6 and the hollow frame 4 respectively, providing support to the tension plate 6 and the hollow frame 4, resisting the shrinkage force of the expansive concrete, thereby reducing the occurrence of shrinkage and reducing the generation of cracks between the expansive concrete and the structural body 1.

[0033] As an improved specific implementation, the connecting block 3 is a triangular prism, and the top and bottom surfaces of the connecting block 3 are provided with a plurality of tensile strips 30, and a concave groove for anti-shrinkage is formed between adjacent tensile strips 30.

[0034] By setting the anti-shrinkage concave groove, the contact area between the connecting block 3 and the post-cast strip 2 is increased and the connection is tighter. Furthermore, the expansive concrete forms a convex strip in the concave groove, and the convex strip is resisted by the tensile strip 30 during shrinkage and is not easily shrinked. Cracks are less likely to appear between the expansive concrete of the post-cast strip 2 and the structural body 1.

[0035] As an improved specific implementation, the opening of the tensile groove 34 is provided with a tensile mesh 31 made of steel wire, and the tensile mesh 31 is provided with an insertion port for the air intake pipe 40 to be inserted. The insertion port is provided with a fixed slot 35, and the inner side of the tensile groove 34 is provided with an L-shaped fixed groove 33 for anti-shrinkage.

[0036] After the expansive concrete is poured, the L-shaped fixing groove 33 will form an L-shaped block. When the expansive concrete shrinks, the L-shaped block is resisted in the L-shaped fixing groove 33 and is not easily shrinked, which enhances the anti-shrinkage effect between the expansive concrete and the structural body 1, making it less likely for cracks to appear between the expansive concrete and the structural body 1.

[0037] As an improved specific implementation, the opening of the tensile groove 34 is provided with fixing seats 32 on both sides, and the two ends of the tensile mesh 31 are fixedly connected to the fixing seats 32 by fasteners.

[0038] After the expansive concrete is poured into the tensile groove 34, it is not easy for the expansive concrete to fall out of the tensile mesh 31, which has the effect of anti-shrinkage, enhances the connection strength between the expansive concrete in the post-pouring strip and the connecting block, and enhances the tensile strength. Therefore, cracks are not easy to occur between the expansive concrete and the structural body 1.

[0039] As an improved specific implementation, the hollow frame 4 is formed by inserting several air inlet pipes 40. One air inlet pipe 40 is integrally provided with a guide fixing pipe 43, and the inner hole of another air inlet pipe 40 is inserted along the guide fixing pipe 43. The air inlet pipe 40 and the guide fixing pipe 43 are fixed by bolts, and a sealing ring 44 is provided at the connection seam between the air inlet pipe 40 and the guide fixing pipe 43.

[0040] The hollow frame 4 is assembled by the guide fixing tube 43, which makes it easier to operate and install. The sealing ring 44 enhances the airtightness and prevents gas from forming bubbles and cracks in the expansion concrete through the joint.

[0041] As an improved specific implementation, the air inlet pipes 40 inserted into the fixing slots 35 on both sides of the hollow frame 4 are provided with casting holes 45.

[0042] After the expansion concrete in the post-pouring strip 2 is poured and vented, the hollow frame 4 is filled through the vent pipe 42. Since the air inlet pipe 40 is inserted into the fixed slot 35, the fixed slot 35 is not fully poured during the expansion concrete pouring process. Therefore, the pouring hole 45 can fill the fixed slot 35 again, thereby enhancing the connection between the air inlet pipe 40 and the fixed slot 35, thereby enhancing the shrinkage resistance, making the expansion concrete and the structural body 1 more tightly connected, and reducing the occurrence of cracks.

[0043] As an improved specific implementation, both sidewalls of the connecting block 3 are provided with tensile grooves 34 and fixing slots 35, the tensile grooves 34 on the two sidewalls are perpendicular to each other, and the fixing slots 35 on the two sidewalls are perpendicular to each other.

[0044] The two side fixing slots 35 of the same connecting block 3 are perpendicular to each other, and the air inlet pipes inserted into the same connecting block are also perpendicular to each other. There are several connecting blocks with air inlet pipes. Therefore, when the expansive concrete shrinks from any angle, there will always be an air inlet pipe 40 supporting the fixing slot 35, which will resist the shrinkage and reduce the generation of cracks between the expansive concrete and the structural body 1.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large planar concrete structure with a crack-resistant post-cast strip, comprising a structural body (1), wherein a post-cast strip (2) is provided between adjacent structural bodies (1), and the post-cast strip (2) is filled with expansive concrete, characterized in that: Several connecting blocks (3) are provided at the connection points between the post-cast strip (2) and the structural body (1). The connecting blocks (3) are integrally cast with the structural body (1). A hollow frame (4) for venting is provided inside the post-cast strip (2). The hollow frame (4) is formed by several air inlet pipes (40) being interlocked and connected. Several air inlet holes (41) are provided on the air inlet pipes (40). Tensile grooves (34) are provided on the side of the connecting block (3). Fixing slots (35) are also provided in the tensile grooves (34). The air inlet pipes (40) on both sides of the hollow frame (4) are respectively obliquely inserted into the fixing slots (35) of each tensile groove (34). Several air inlet pipes (40) of the hollow frame (4) An upward-facing exhaust pipe (42) is provided at the adjacent intersection. A tensile plate (6) is provided at the upper end of the hollow frame (4). The exhaust pipe (42) passes through the tensile plate (6). A support spring (7) is provided between the tensile plate (6) and the hollow frame (4). The support spring (7) is sleeved on the outer end of the exhaust pipe (42). One end of the support spring (7) is fixed to the tensile plate (6), and the other end is fixed to the hollow frame (4). A tensile mesh (31) made of steel wire is provided at the opening of the tensile groove (34). An insertion port for the intake pipe (40) is provided at the tensile mesh (31). The insertion port is set corresponding to the fixing slot (35). The inner side of the tensile groove (34) is provided with L-shaped anti-shrinkage. The hollow frame (4) is formed by inserting several air inlet pipes (40). One air inlet pipe (40) is integrally provided with a guide fixing pipe (43). The inner hole of another air inlet pipe (40) is inserted along the guide fixing pipe (43). The air inlet pipe (40) and the guide fixing pipe (43) are fixed by bolts. A sealing ring (44) is provided at the connection seam between the air inlet pipe (40) and the guide fixing pipe (43).

2. The ultra-large planar concrete structure with crack-resistant post-cast strip according to claim 1, characterized in that: Several transverse steel bars (5) are inserted between adjacent structural bodies (1). The several transverse steel bars (5) are divided into two layers. One layer is set at the upper end of the tensile plate (6), and the other layer is set at the lower end of the hollow frame (4). The tensile plate (6) and the hollow frame (4) are both tied and fixed with the transverse steel bars (5).

3. The ultra-large planar concrete structure with anti-crack post-cast strip as described in claim 1, its features are as follows: The feature is that the connecting block (3) is a triangular prism, and the top and bottom surfaces of the connecting block (3) are provided with a plurality of tensile strips (30), and a concave groove for anti-shrinkage is formed between adjacent tensile strips (30).

4. The ultra-large planar concrete structure with crack-resistant post-cast strip according to claim 1, characterized in that: The opening of the tensile groove (34) is provided with a fixing seat (32) on both sides, and the two ends of the tensile mesh (31) are fixedly connected to the fixing seat (32) by fasteners.

5. The ultra-large planar concrete structure with crack-resistant post-cast strip according to claim 1, characterized in that: The air inlet pipe (40) inserted into the fixing slot (35) on both sides of the hollow frame (4) is provided with casting holes (45).

6. The ultra-large planar concrete structure with crack-resistant post-cast strip according to claim 1, characterized in that: The two side walls of the connecting block (3) are provided with tensile grooves (34) and fixing slots (35). The tensile grooves (34) on the two side walls are perpendicular to each other, and the fixing slots (35) on the two side walls are perpendicular to each other.

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