Post-cast strip plugging structure

Abstract

The post-cast strip plugging structure is characterized in that two supporting structures are arranged in a spaced mode in the first direction, each supporting structure comprises a pre-cast beam plate component and a reverse ridge, the first direction intersects with the thickness direction of the pre-cast beam plate component, and the reverse ridge is arranged at the end, close to the other pre-cast beam plate component, of the pre-cast beam plate component; and the steel plate is positioned above the pre-cast beam plate component. The post-cast strip is located on the first combination face of the reverse ridges and connected with the two reverse ridges in the first direction, and the post-cast strip covers the first combination face. The water stop part is partially arranged in the reverse ridge, and the part, located outside the first combination face, of the water stop part is arranged in the post-cast strip. In this way, the first joint surface is parallel to the stress direction generated by shrinkage of the post-cast strip, the shear failure effect generated by the stress is reduced, and the cracking probability of the joint surface is reduced. In addition, the water stop piece is vertically arranged and forms a water stop barrier crossing the reverse ridge and the post-cast strip, so that the extension direction of the water stop piece is perpendicular to the stress direction, the joint surface is not prone to cracking, and the water stop effect is guaranteed.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, and in particular to a post-cast strip sealing structure. Background Technology

[0002] A post-cast strip is a temporary construction joint left during building construction to prevent harmful cracks that may occur in cast-in-place reinforced concrete structures due to uneven shrinkage or settlement. The post-cast strip temporarily divides the structure into several parts. After the design requirements are met, the concrete of the construction joint is poured to connect the structure into a whole.

[0003] However, under the influence of concrete shrinkage, temperature changes, or load, cracks may appear at the interface between the old and new concrete in the post-cast strip, leading to an increased risk of water seepage. Summary of the Invention

[0004] This invention discloses a post-pouring strip sealing structure that can reduce the risk of water seepage.

[0005] To achieve the above objectives, the first aspect of this invention discloses a post-cast strip sealing structure, comprising: Two support structures are provided, which are spaced apart along a first direction. Each support structure includes a precast beam-slab member and a countersunk member. The countersunk member is located at one end of the precast beam-slab member near the other precast beam-slab member, and is positioned above the precast beam-slab member along the thickness direction of the precast beam-slab member. The countersunk member has a first mating surface along the thickness direction of the precast beam-slab member. A post-cast strip is located on the two first joint surfaces along the thickness direction of the first-cast beam-slab member. The post-cast strip is configured to connect the two anti-reflective supports along the first direction and to cover the first joint surfaces along the first direction. A water-stopping component, wherein a portion of the water-stopping component is disposed within the anti-reflective curb, and the portion of the water-stopping component located outside the first mating surface is disposed within the post-cast strip; The first direction intersects with the thickness direction of the pre-cast beam-slab component.

[0006] As an optional implementation, the countersunk includes a first edge side and a second edge side opposite to each other along the first direction. In the first direction, the first edge sides of the two countersunks are arranged facing each other, and the second edge sides of the two countersunks are arranged opposite to each other. The water-stopping element is arranged adjacent to the second edge side.

[0007] As an optional implementation, the post-cast strip blocking structure further comprises two drainage members arranged on the pre-cast beam slab component along the thickness direction of the pre-cast beam slab component and connected to two sides of the post-cast strip along the first direction respectively, the drainage member has a drainage surface, and the drainage surface is inclined in the direction from the post-cast strip to the pre-cast beam slab component along the first direction to guide water flow away from the first bonding surface.

[0008] As an optional implementation, the drainage surface is inclined in the direction from the post-cast strip to the pre-cast beam slab component along the first direction at an inclination angle α ≤ 45°.

[0009] As an optional implementation, the post-cast strip blocking structure further comprises a waterproof layer covering the drainage surface and the upper surface of the post-cast strip along the thickness direction of the pre-cast beam slab component.

[0010] As an optional implementation, when the water stop member is a water stop steel plate, the water stop member comprises a main plate part and two wing plate parts, the main plate part and the two wing plate parts together form a water stop space, and the opening of the water stop space is directed to one side of the post-cast strip along the first direction; and / or, When the water stop member is a water stop steel plate, the water stop member extends along the thickness direction of the pre-cast beam slab component.

[0011] As an optional implementation, the pre-cast beam slab component is a slab or a beam; When the pre-cast beam slab component is a slab, the thickness of the post-cast strip along the thickness direction of the pre-cast beam slab component is equal to the thickness of the pre-cast beam slab component.

[0012] As an optional implementation, when the pre-cast beam slab component is a beam, the post-cast strip along the thickness direction of the pre-cast beam slab component comprises a first connecting part and a second connecting part, the first connecting part is connected between two pre-cast beam slab components along the first direction, the second connecting part is located above the first connecting part along the thickness direction of the pre-cast beam slab component, the second connecting part is located on the two first bonding surfaces and connected between two reverse ridges along the first direction, and the second connecting part covers the two first bonding surfaces along the first direction.

[0013] As an optional embodiment, the first connecting portion is provided with a plurality of first longitudinal bars and a plurality of first stirrups, the first longitudinal bars extend along the first direction, a part of the first longitudinal bars is arranged in the beam, and another part of the first longitudinal bars is arranged in the first connecting portion to connect the beam and the first connecting portion, the plurality of first stirrups are arranged at intervals along the first direction, and the first stirrups are configured to fix the plurality of first longitudinal bars, a part of the first stirrups is arranged in the beam, and another part of the first stirrups is arranged in the first connecting portion; The second connecting portion is provided with a plurality of second longitudinal bars and a plurality of second stirrups, the second longitudinal bars extend along the first direction, and the second longitudinal bars are arranged adjacent to the top of the second connecting portion along the thickness direction of the cast-in-place beam slab member, the plurality of second stirrups are arranged at intervals along the first direction, and the second stirrups are arranged one by one corresponding to the first stirrups, the second stirrups have openings facing the cast-in-place beam slab member, a part of the second stirrups extends into the first connecting portion, and the part of the second stirrups extending into the first connecting portion is configured to connect the first stirrups to fix the second longitudinal bars.

[0014] As an optional embodiment, the distance between two adjacent first stirrups arranged in the first connecting portion along the first direction is less than the distance between two adjacent stirrups in the cast-in-place beam slab member along the first direction.

[0015] Compared with the prior art, the application has the following beneficial effects: The application provides a post-pouring strip plugging structure, which comprises two support structures arranged at intervals along a first direction, the support structure comprises a pre-poured beam plate component and a reverse ridge located above the pre-poured beam plate component along the thickness direction of the pre-poured beam plate component, and the reverse ridge is arranged at one end of the pre-poured beam plate component close to another pre-poured beam plate component, and the reverse ridge has a first joint surface along the thickness direction of the pre-poured beam plate component. A post-pouring strip is located on the two first joint surfaces along the thickness direction of the pre-poured beam plate component and covers the first joint surface along the first direction, and is configured to connect the two reverse ridges. A water stop part is arranged in the reverse ridge, and the part outside the first joint surface is arranged in the post-pouring strip. The first direction intersects the thickness direction of the pre-poured beam plate component. By arranging the reverse ridge above the pre-poured beam plate component along the thickness direction of the pre-poured beam plate component, the reverse ridge is located at one end of the pre-poured beam plate component close to another pre-poured beam plate component, the post-pouring strip is located on the two first joint surfaces and covers the first joint surface, and is configured to connect the two reverse ridges. In this way, the first joint surface of the pre-poured beam plate component and the post-pouring strip can be changed into extending along the first direction through the reverse ridge, and when the post-pouring strip shrinks, the direction of the first joint surface is parallel to the shrinkage direction, so that even if a crack is generated, the direction of the crack is parallel to the first joint surface, and the crack will not penetrate through the first joint surface. In addition, the water stop part is arranged in the reverse ridge, and the part outside the first joint surface is arranged in the post-pouring strip, the water stop part forms a sealing structure across the reverse ridge and the post-pouring strip, and can absorb the displacement generated due to shrinkage through the elasticity of the water stop part, thereby enhancing the anti-permeation effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1 is a structural schematic diagram of the new-old concrete interface of the post-pouring strip in the related art; Figure 2 is a structural schematic diagram of the post-pouring strip plugging structure of the pre-poured beam plate component as a plate disclosed in the embodiments of the present application; Figure 3 is Figure 2 is a sectional view of A-A in FIG. 4; Figure 4 is Figure 2 is another sectional view of A-A in FIG. 4; Figure 5 is a structural schematic diagram of the pre-poured beam plate component and the reverse ridge disclosed in the embodiments of the present application; Figure 6 is a structural schematic diagram of the water stop part disclosed in the embodiments of the present application; Figure 7 is a post-pouring belt blocking structure of the beam of the pre-pouring beam slab component disclosed by the embodiments of the present application; Figure 8 is Figure 7 is a structural schematic view at B-B in FIG. 1. Figure 9 is a specific structural schematic view of the post-pouring belt of the beam disclosed by the embodiments of the present application. Figure 10 is Figure 7 is a structural schematic view at C-C in FIG. 1.

[0018] Explanation of reference signs: 100-post-pouring belt blocking structure; 1-supporting structure; 11-pre-pouring beam slab component; 111-first connecting part; 111a-first longitudinal reinforcement; 111b-first stirrup; 112-second connecting part; 112a-second longitudinal reinforcement; 112b-second stirrup; 12-anti-knock; 121-first bonding surface; 122-first edge side; 123-second edge side; 2-post-pouring belt; 3-water stop member; 31-main plate part; 32-wing plate part; 33-water stop space; 4-drainage member; 5-drainage surface; X-first direction; Y-thickness direction of the pre-pouring beam slab component; a-inclination angle; 200-new and old concrete interface; N-stress direction. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] In the present application, the positions or location relationships indicated by the terms “upper”, “lower” and the like are based on the positions or location relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific position, or to be constructed and operated in a specific position.

[0021] In addition, in addition to indicating the position or location relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term “upper” can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those skilled in the art can understand the specific meaning of these terms in the present application according to the specific situation.

[0022] In addition, the terms "set", "connected" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate media, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0023] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific type and structure may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "a plurality of" is two or more.

[0024] The post-pouring strip is a temporary construction joint left in building construction to prevent harmful cracks in cast-in-place reinforced concrete structures due to uneven shrinkage or uneven settlement. The post-pouring strip temporarily divides the structure into several parts, and after meeting the design requirements, the temporary construction joint concrete is poured and vibrated, and the structure is connected as a whole.

[0025] The common construction method of the post-pouring strip of the basement roof is to pre-bury a horizontally placed water stop steel plate on both sides of the post-pouring strip before pouring the concrete, and to use a quick closing net or steel mesh for interception. After the post-pouring strip construction joint is treated, the concrete is poured, and the water stop steel plate is horizontally arranged in the middle of the post-pouring strip. Because there are no fixed interception measures around the post-pouring strip, and there are no protection measures on the upper part of the new and old concrete surfaces, cracks are easily generated at the interface between the new and old concrete in the later stage, increasing the risk of water seepage.

[0026] For example, in the related art, the concrete at the interface 200 between the new and old concrete at the post-pouring strip is perpendicular to the stress direction N generated by temperature action or shrinkage (as shown in Figure 1 , Figure 1 is a structural schematic view of the interface between the new and old concrete at the post-pouring strip in the related art), which is easy to produce through cracks, thereby causing the risk of water seepage.

[0027] In view of this, this application discloses a post-cast strip sealing structure. Two supporting structures are spaced apart along a first direction. The supporting structure includes a pre-cast beam / slab member and a curb. The curb is located at one end of the pre-cast beam / slab member near another pre-cast beam / slab member and is positioned above the pre-cast beam / slab member. The post-cast strip is located on the first mating surface of the curb. The post-cast strip is configured to connect the two curbs along the first direction and covers the first mating surface. A water-stopping element is partially disposed within the curb, and a portion located outside the first mating surface is disposed within the post-cast strip. The first direction intersects the thickness direction of the pre-cast beam / slab member. By setting a curb on the transverse structure, the post-cast strip is located on the first mating surface of the curb along the thickness direction of the pre-cast beam / slab member, and the post-cast strip connects the two curbs and covers the first mating surface. This ensures that the first mating surface is parallel to the stress direction generated by the shrinkage of the post-cast strip, reducing the shear failure effect of the stress and lowering the probability of cracking at the mating surface. In addition, the water-stopping components are arranged vertically and form a water-stopping barrier spanning the inverted curb and the post-cast strip. In this way, the extension direction of the water-stopping components is perpendicular to the stress direction, causing the joint surface to deform and crack, thus ensuring the water-stopping effect.

[0028] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0029] Please see Figures 2 to 5 , Figure 2 This is a schematic diagram of the post-cast strip sealing structure for beam-slab members that are cast first, as disclosed in the embodiments of this application. Figure 3 yes Figure 2 A cross-sectional view at point AA. Figure 4 yes Figure 2 Another cross-sectional view at point AA. Figure 5 This is a schematic diagram of the pre-cast beam-slab component and the inverted curb disclosed in an embodiment of this application. The post-cast strip sealing structure 100 disclosed in this application includes two support structures 1, a post-cast strip 2, and a waterstop 3. The two support structures 1 are spaced apart along a first direction X. Each support structure 1 includes a pre-cast beam-slab component 11 and an inverted curb 12. The inverted curb 12 is located at one end of the pre-cast beam-slab component 11 near the other pre-cast beam-slab component 11, and is positioned above the pre-cast beam-slab component 11 along the thickness direction Y. The inverted curb 12 has a first mating surface 121 along the thickness direction Y of the pre-cast beam-slab component 11. The post-cast strip 2 is located on the two first mating surfaces 121 along the thickness direction Y of the pre-cast beam-slab component 11. The post-cast strip 2 is configured to connect the two inverted curbs 12 along the first direction X, and the post-cast strip 2 covers the first mating surfaces 121 along the first direction X. The waterstop 3 extends along the thickness direction Y of the first-cast beam-slab member 11, and is partially disposed within the backsplash 12. The portion of the waterstop 3 located outside the first joint surface 121 is disposed within the post-cast strip 2. The first direction X intersects with the thickness direction Y of the first-cast beam-slab member 11.

[0030] The post-pouring strip blocking structure 100 disclosed in the present application sets the reverse ridge 12 above the first-pouring beam slab component 11 in the thickness direction Y of the first-pouring beam slab component 11, and the reverse ridge 12 is arranged at one end of the first-pouring beam slab component 11 close to another first-pouring beam slab component 11, and the reverse ridge 12 has a first joint surface 121 in the thickness direction Y of the first-pouring beam slab component 11. The post-pouring strip 2 is arranged on the two first joint surfaces 121 in the thickness direction Y of the first-pouring beam slab component 11, and is used to connect the two reverse ridges 12 in the first direction X, and the post-pouring strip 2 covers the first joint surface 121 in the first direction X. In this way, the interface of the reverse ridge 12 and the post-pouring strip 2, that is, the direction of the first joint surface 121, is parallel to the stress direction generated by the shrinkage of the post-pouring strip 2, thereby reducing the shearing damage effect of the stress, that is, even if the post-pouring strip 2 shrinks, the post-pouring strip 2 and the reverse ridge 12 will only be dislocated, but will not be directly torn between the post-pouring strip 2 and the reverse ridge 12, thereby reducing the risk of cracking of the joint surface of the reverse ridge 12 and the post-pouring strip 2, and thereby reducing the risk of water seepage.

[0031] In addition, the water stop element 3 extends in the thickness direction Y of the first-pouring beam slab component 11, and is partially arranged in the reverse ridge 12, and the part of the water stop element 3 outside the first joint surface 121 is arranged in the post-pouring strip 2, that is, the water stop element 3 is arranged in the thickness direction Y of the first-pouring beam slab component 11, so that the extension direction of the water stop element 3 intersects the stress direction generated by the shrinkage of the post-pouring strip 2, on the one hand, the water stop element 3 can absorb part of the stress, and on the other hand, even if the post-pouring strip 2 shrinks and is dislocated in the first direction X with the reverse ridge 12, the water stop element 3 can also absorb the stress, so that the joint surface is not easy to crack, thereby ensuring the water stopping effect of the water stop element 3.

[0032] The post-cast strip of the basement roof or basement beam needs to bear the load of the upper backfill soil, vehicle load and its own structure dead weight, and is in the transition area between the ground and the underground, and the environmental influence factors such as temperature change and dry-wet alternation are more significant. The post-cast strip needs to solve the problem of seepage of surface water and rainwater, and more focuses on blocking the downward seepage of the water on the ground. First, the stress state of the combination surface of the pre-cast beam slab component 11 and the post-cast strip 2 is optimized by setting the reverse ridge 12. The reverse ridge is set at one end of the pre-cast beam slab component 11 close to another pre-cast beam slab component 11, and is located above the pre-cast beam slab component 11 along the thickness direction Y of the pre-cast beam slab component 11. The reverse ridge 12 has a first combination surface 121 along the thickness direction Y of the pre-cast beam slab component 11. The post-cast strip 2 is located on the two first combination surfaces 121 along the thickness direction Y of the pre-cast beam slab component 11. In this way, the first combination surface 121 of the pre-cast beam slab component 11 and the post-cast strip 2 is in a horizontal direction, which is parallel to the stress direction caused by the shrinkage of the post-cast strip 2, while the combination surface of the new and old concrete in the related art is perpendicular to the stress direction. In this way, when the post-cast strip 2 shrinks, the post-cast strip sealing structure 100 disclosed in the application can reduce the shearing damage of stress to the first combination surface 121, and avoid the problem that the combination surface of the new and old concrete is directly torn due to stress in the related art.

[0033] Further, in order to strengthen the water seepage prevention effect, the water stop piece 3 is arranged along the thickness direction of the pre-cast beam slab component 11, which is perpendicular to the first combination surface 121. The water stop piece 3 is partially embedded in the reverse ridge 12 and partially located in the post-cast strip 2, forming a water stop barrier across the reverse ridge 12 and the post-cast strip 2. This arrangement can allow the water stop piece 3 to absorb part of the stress, avoiding the situation that the horizontally placed water stop piece in the related art is directly pulled and damaged when it is subjected to stress because it is parallel to the combination surface of the new and old concrete, so as to more reliably block the water seepage.

[0034] It can be understood that the pre-cast beam slab component 11 described above can be a slab or a beam, and the thickness direction Y of the pre-cast beam slab component 11 is a vertical direction. The first direction X is any direction in the plane perpendicular to the thickness direction Y of the pre-cast beam slab component 11, for example, the horizontal direction in the related art. Figure 1

[0035] It can be understood that the support structure 1 usually includes both slabs and beams. The post-cast strip 2 is partially arranged between the slabs and partially arranged between the beams.

[0036] It can be understood that the post-cast strip 2 is usually in a strip shape. In one post-cast strip 2, part is cast between the slabs and part is cast between the beams. However, this post-cast strip 2 is continuously cast to form a continuous whole, ensuring the continuity of the entire post-cast strip 2. Therefore, the post-cast strip has a length direction and a width direction, both of which intersect the thickness direction Y of the pre-cast beam slab component 11.​Figure 1 The first direction X in the diagram should be the width direction of the post-cast strip.

[0037] It is understandable that the anti-reinforcement frame 12 is installed simultaneously with the construction of the beam and slab components 11, that is, the anti-reinforcement frame 12 is cast into one piece with the slab or beam at the same time.

[0038] It is understandable that the anti-reinforcement wall 12 is formed by pouring reinforced concrete.

[0039] It is understandable that the first mating surface 121 of the anti-reflector 12 is the upper surface of the anti-reflector 12 in the thickness direction Y of the first cast beam-slab component 11.

[0040] It is understandable that the following principles apply to both the curb and the beam: the height of the curb 12 should be between 50mm and the thickness of the curb along the thickness direction Y of the first-cast beam-slab member 11; the length of the curb 12 along the width direction of the post-cast strip 2 should be greater than or equal to the thickness of the slab along the vertical direction. The height and length of the curb 12 on the beam are related to the parameters of the slab connected to the beam in the same post-cast strip.

[0041] It is understandable that the waterstop 3 is pre-embedded in the first-cast beam and slab component 11. The waterstop 3 in a post-cast strip 2 is also long and narrow. That is, the waterstop 3 in this post-cast strip 2 is also partially located in the anti-reflective wall 12 on the slab and partially located in the anti-reflective wall 12 on the beam, thereby ensuring the continuity of the waterstop 3 and avoiding affecting the waterstop effect.

[0042] It is understood that the water-stopping component 3 can be a water-stopping steel plate or an expansion water-stopping strip, etc., and this embodiment does not specifically limit it.

[0043] Please see Figure 5 In some embodiments, the countersunk 12 includes a first edge side 122 and a second edge side 123 opposite to each other along a first direction X. In the first direction X, the first edge sides 122 of the two countersunk 12 are arranged facing each other, and the second edge sides 123 of the two countersunk 12 are arranged opposite to each other. The waterstop 3 is arranged adjacent to the second edge side 123.

[0044] By setting the waterstop 3 near the second edge side 123 of the reverse wall 12 along the first direction X, that is, by setting the waterstop 3 near the outer edge of the first-cast beam and slab component 11, a waterstop barrier closer to the periphery of the reverse wall 12 can be formed. In this way, when water seepage occurs, the seepage can be intercepted earlier, preventing the seepage from flowing to the inner first joint surface 121 and causing water seepage.

[0045] It can be understood that the post-pouring strip 2 at least completely covers two first joint surfaces 121 along the first direction X, that is, the length of the post-pouring strip 2 along the first direction X is at least the same as the length between the second edge sides 123 of the two reverse ridges 12, or can be greater than the length between the second edge sides 123 of the two reverse ridges 12, so that the problem of local disengagement caused by the post-pouring strip 2 not completely covering the first joint surface 121 can be avoided, and water seepage can be generated.

[0046] Optionally, referring to Figures 3 to 6 , Figure 6 is a structural schematic diagram of the water stop member disclosed in the embodiments of the present application. When the water stop member 3 is a water stop steel plate, the structure of the water stop member 3 can have two cases.

[0047] In one case, the water stop member 3 extends along the thickness direction Y of the pre-poured beam slab member 11, that is, the water stop member 3 is a long strip steel plate extending along the thickness direction Y of the pre-poured beam slab member 11.

[0048] In another case, the water stop member 3 includes a main plate part 31 and two wing plate parts 32. The main plate part 31 and the two wing plate parts 32 jointly constitute a water stop space 33, and the opening of the water stop space 33 faces one side of the post-pouring strip 2 along the first direction X.

[0049] The main plate part 31 of the water stop steel plate is vertically embedded in the reverse ridge 12, and the two wing plate parts 32 are unfolded to one side of the post-pouring strip 2 along the first direction X to form a “U-shaped” or “V-shaped” water stop space 33 (the side facing the post-pouring strip 2). When the water flow seeps along the first joint surface 121 to the water stop steel plate, the water flow is blocked by the main plate part 31, and the water stop space 33 formed by the two wing plate parts 32 can further hold the seepage water, so as to avoid continuous seepage, which helps to improve the water seepage prevention effect of the water stop steel plate.

[0050] Optionally, referring to Figures 3 to 6 , the post-pouring strip plugging structure 100 further includes two drainage members 4, which are arranged on the pre-poured beam slab member 11 along the thickness direction Y of the pre-poured beam slab member 11 and are connected to two sides of the post-pouring strip 2 along the first direction X, respectively. The drainage member 4 has a drainage surface 5, which is inclined in the direction from the post-pouring strip 2 to the pre-poured beam slab member 11 along the first direction X, so as to guide the water flow away from the first joint surface 121.

[0051] By setting the drainage member 4, and the drainage member 4 is set on the pre-cast beam slab component 11, and is connected to two sides of the post-pouring belt 2 along the first direction X respectively, and the drainage member 4 has a drainage surface 5 which is inclined in the direction from the post-pouring belt 2 to the pre-cast beam slab component 11 along the first direction X, to guide the water flow away from the first bonding surface 121. In this way, the accumulated water on the surface of the post-pouring belt 2 can be quickly guided away from the area of the first bonding surface 121 by the drainage surface 5 of the drainage member 4, so as to avoid the water flow accumulated at the bonding surface, and even seep into the first bonding surface 121.

[0052] It can be understood that the drainage member 4 is a slope for concrete pouring, and can be formed by pouring C20 plain concrete or C20 concrete mixed with fibers, for example, polypropylene fibers or steel fibers are mixed in the C20 plain concrete, so as to improve the crack resistance.

[0053] Optionally, the inclination angle α of the drainage surface 5 inclined in the direction from the post-pouring belt 2 to the pre-cast beam slab component 11 is ≤45°. When the angle is too large (such as α>45°), the drainage surface 5 will be too steep, so that the scouring force of the water flow on the drainage surface will be too large, which will cause erosion to the connection part of the drainage member 4 and the pre-cast beam slab component 11. When the inclination angle α is ≤45°, the drainage surface 5 can quickly and smoothly guide the water flow from the post-pouring belt 2 to the pre-cast beam slab component 11 direction by using gravity, so as to reduce the residence time of the water flow near the first bonding surface 121, and reduce the probability of water seepage.

[0054] It can be understood that the inclination angle α can be 30°≤α≤45°, 20°≤α≤40°, 5°≤α≤42° or 10°≤α≤37°. For example, α can be 5°, 11°, 29°, 38° or 45°.

[0055] In some embodiments, the post-pouring belt plugging structure 100 further comprises a waterproof layer (not shown in the figure), which covers the drainage surface 5 and the upper surface of the post-pouring belt 2 along the thickness direction Y of the pre-cast beam slab component 11.

[0056] There is a risk of water seepage at the junction of the drainage member 4 and the post-pouring belt 2, and by setting the waterproof layer which covers the drainage surface 5 and the upper surface of the post-pouring belt 2 along the thickness direction Y of the pre-cast beam slab component 11, the junction of the drainage member 4 and the post-pouring belt 2 can be waterproof sealed.

[0057] It can be understood that the waterproof layer can be polyurethane waterproof paint or polymer modified asphalt (asphalt as base material, mixed with random polypropylene modifier and the like), which is not specifically limited in the present embodiment.

[0058] It can be understood that when the pre-cast beam slab component 11 is a slab, the thickness of the post-pouring strip 2 along the thickness direction Y of the pre-cast beam slab component 11 is equal to the thickness of the pre-cast beam slab component 11. The thickness of the post-pouring strip 2 is equal to the thickness of the slab, which can ensure that the post-pouring strip 2 and the two pre-cast beam slab components 11 form a continuous stress section in the thickness direction Y, avoid local stiffness mutation caused by the post-pouring strip 2 being too high or too low, and thus improve the stability of the whole structure.

[0059] It can be understood that when the pre-cast beam slab component 11 is a beam, the height of the post-pouring strip 2 along the thickness direction Y of the pre-cast beam slab component 11 is equal to the height of the beam along the thickness direction Y of the pre-cast beam slab component 11, the height of the reverse ridge 12 along the thickness direction Y of the pre-cast beam slab component 11, and the thickness of the slab connected to the same post-pouring strip 2 along the thickness direction Y of the pre-cast beam slab component 11. In this way, the post-pouring strip 2 and the two pre-cast beam slab components 11 can form a continuous stress section in the thickness direction Y, avoid local stiffness mutation caused by the post-pouring strip 2 being too high or too low, and thus improve the stability of the whole structure.

[0060] Please refer to Figures 7 to 9 , Figure 7 is a post-pouring strip plugging structure of the pre-cast beam slab component being a beam according to the embodiments of the present application, Figure 8 is Figure 7 is a structural schematic view of B-B in Figure 9 is a specific structural schematic view of the post-pouring strip of the beam according to the embodiments of the present application. In some embodiments, when the pre-cast beam slab component 11 is a beam, the post-pouring strip 2 along the thickness direction Y of the pre-cast beam slab component 11 includes a first connecting part 111 and a second connecting part 112. The first connecting part 111 is connected between the two pre-cast beam slab components 11 along the first direction X. The second connecting part 112 is located above the first connecting part 111 along the thickness direction Y of the pre-cast beam slab component 11, is located on the two first combination surfaces 121, and is connected between the two reverse ridges 12 along the first direction X. Along the first direction X, the second connecting part 112 covers the two first combination surfaces 121.

[0061] By the post-pouring strip 2 including the first connecting part 111 and the second connecting part 112, the first connecting part 111 is connected between the two pre-cast beam slab components 11, and the second connecting part 112 is located on the first combination surface 121 and is connected between the two reverse ridges 12 along the first direction X. In this way, the first combination surface 121 of the reverse ridge 12 is completely covered by the second connecting part 112, which effectively disperses the bending moment and shear force received by the beam, improves the overall stiffness, and reduces the risk of cracking of the post-pouring strip 2 and the beam combination surface.

[0062] It can be understood that the distance between the first bonding surface 121 and the top surface of the second connecting portion 112 of the post-cast strip 2 along the thickness direction Y of the pre-cast beam slab component 11 is the same as the thickness of the slab.

[0063] It can be understood that the first connecting portion 111 and the second connecting portion 112 should be integrally cast.

[0064] Optionally, referring to Figure 9 and Figure 10 , Figure 10 is Figure 7 the structural diagram at C-C in FIG. 1, the first connecting portion 111 is provided with a plurality of first longitudinal bars 111a and a plurality of first stirrups 111b, the first longitudinal bars 111a extend along the first direction X, and a part of the first longitudinal bars 111a is arranged in the beam and a part of the first longitudinal bars 111a is arranged in the first connecting portion 111 to connect the beam and the first connecting portion 111. The plurality of first stirrups 111b are arranged at intervals along the first direction X, and the first stirrups 111b are configured to fix the plurality of first longitudinal bars 111a, and a part of the first stirrups 111b is arranged in the beam and another part of the first stirrups 111b is arranged in the first connecting portion 111. The second connecting portion 112 is provided with a plurality of second longitudinal bars 112a and a plurality of second stirrups 112b, the second longitudinal bars 112a extend along the first direction X, and the second longitudinal bars 112a are arranged adjacent to the top of the second connecting portion 112 along the thickness direction Y of the pre-cast beam slab component 11. The plurality of second stirrups 112b are arranged at intervals along the first direction X, and the second stirrups 112b are arranged one by one corresponding to the first stirrups 111b, and the second stirrups 112b have an opening facing the pre-cast beam slab component 11. A part of the second stirrups 112b extends into the first connecting portion 111, and the part of the second stirrups 112b extending into the first connecting portion 111 is configured to connect the first stirrups 111b to fix the second longitudinal bars 112a.

[0065] The first longitudinal bars 111a of the first connecting portion 111 extend along the first direction X, and a part of the first longitudinal bars 111a is embedded in the beam and another part of the first longitudinal bars 111a is located in the post-cast strip 2, which can ensure the continuity of the longitudinal stress of the beam. The first stirrups 111b are arranged at intervals along the first direction X, which can not only enhance the shear capacity of the post-cast strip 2, but also firmly fix the first longitudinal bars 111a to ensure that the load received by the post-cast strip 2 is smoothly transmitted through the steel reinforcement cage. The second longitudinal bars 112a of the second connecting portion 112 are arranged adjacent to the top, which can supplement the stress demand of the upper part of the beam and form a complete cross-section stress system with the first longitudinal bars 111a to ensure the bearing capacity of the post-cast strip 2.

[0066] In addition, the second stirrup 112b is arranged in one-to-one correspondence with the first stirrup 111b, and the second stirrup 112b partially extends into the first connecting part 111 and is connected with the first stirrup 111b. In this way, the first connecting part 111 and the second connecting part 112 are rigidly connected through the connection of the second stirrup 112b and the first stirrup 111b, so as to avoid the overall delamination and cracking of the post-pouring belt 2.

[0067] It can be understood that the first longitudinal reinforcement 111a is pre-embedded in the beam during beam pouring, and the first stirrup 111b is also fixed at the same time of beam pouring. The second longitudinal reinforcement 112a and the second stirrup 112b should be fixed before the post-pouring belt 2 is poured, and then the part of the post-pouring belt 2 is poured with concrete.

[0068] It can be understood that the second stirrup 112b is in the shape of an inverted U, and the opening faces the pre-poured beam slab component 11 along the thickness direction Y of the pre-poured beam slab component 11. The second stirrup 112b and the first stirrup 111b can be fixed by binding or welding, and the present embodiment does not make specific limitations thereon.

[0069] Optionally, the distance between the adjacent first stirrups 111b in the first connecting part 111 along the first direction X is smaller than the distance between the adjacent two stirrups in the pre-poured beam slab component 11 along the first direction X.

[0070] When the post-pouring belt 2 is subjected to load, the first connecting part 111 not only transmits the shear force of the two side beam bodies, but also bears the collaborative force of itself and the second connecting part 112, and the shear load is significantly higher than that of other regions of the beam body. The main function of the stirrup is to resist shear force. By densifying the first stirrups 111b in the first connecting part 111, the constraint ability of the concrete can be improved, and the shear failure of the first connecting part 111 can be effectively resisted.

[0071] It can be understood that when the pre-poured beam slab component 11 is a slab, the reinforcement in the post-pouring belt 2 is the same as the reinforcement in the slab, including but not limited to: the type, diameter, and spacing of the steel bars, and the present embodiment does not make specific limitations thereon.

[0072] Next, the construction method of the post-pouring belt 2 (when the pre-poured beam slab component 11 is a slab) of the present application will be described: The reverse ridge 12 is integrally formed and poured out when pouring the slab, and the water stop element 3 is pre-embedded in the reverse ridge 12; The reinforcement in the post-pouring belt 2 area is fixed, the post-pouring belt 2 is closed after meeting the relevant construction conditions, and the post-pouring belt 2 area is poured with concrete to form the post-pouring belt 2; After the concrete in the post-pouring belt 2 reaches the side form removal strength, the formwork is removed; The drainage element 4 is poured on both sides of the post-pouring belt 2; A waterproof layer is laid on the surface of the post-pouring belt 2 and the drainage member 4 on both sides thereof.

[0073] Next, the construction method of the post-pouring belt 2 (when the pre-poured beam slab member 11 is a beam) of the present application is described: The reverse ridge 12 is integrally formed and poured out when pouring the beam, and the water stop member 3 is embedded in the reverse ridge 12, and the steel bars in the beam and in the post-pouring belt 2 are fixed; After the relevant construction conditions are met, the post-pouring belt 2 is closed, and concrete is poured into the area of the post-pouring belt 2 to form the post-pouring belt 2; After the strength of the concrete in the post-pouring belt 2 reaches the side mold removal strength, the mold is removed; The drainage member 4 is poured on both sides of the post-pouring belt 2; A waterproof layer is laid on the surface of the post-pouring belt 2 and the drainage member 4 on both sides thereof.

[0074] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A post-cast strip sealing structure, characterized in that, include: Two support structures are provided, which are spaced apart along a first direction. Each support structure includes a precast beam-slab member and a countersunk member. The countersunk member is located at one end of the precast beam-slab member near the other precast beam-slab member, and is positioned above the precast beam-slab member along the thickness direction of the precast beam-slab member. The countersunk member has a first mating surface along the thickness direction of the precast beam-slab member. A post-cast strip is located on the two first joint surfaces along the thickness direction of the first-cast beam-slab member. The post-cast strip is configured to connect the two anti-reflective supports along the first direction and to cover the first joint surfaces along the first direction. A water-stopping element extends along the thickness direction of the pre-cast beam-slab component and is partially disposed within the countersunk wall; the portion of the water-stopping element located outside the first joint surface is disposed within the post-cast strip. The first direction intersects with the thickness direction of the pre-cast beam-slab component.

2. The post-cast strip sealing structure according to claim 1, characterized in that, The countersunk includes a first edge side and a second edge side that are opposite each other along the first direction. In the first direction, the first edge sides of the two countersunks are arranged facing each other, and the second edge sides of the two countersunks are arranged opposite each other. The water-stopping element is arranged adjacent to the second edge side.

3. The post-cast strip sealing structure according to claim 1, characterized in that, The post-cast strip sealing structure further includes two drainage components. The two drainage components are disposed on the pre-cast beam and slab component along the thickness direction of the pre-cast beam and slab component, and are respectively connected to both sides of the post-cast strip along the first direction. The drainage component has a drainage surface, which is inclined in the first direction from the post-cast strip to the pre-cast beam and slab component to guide the water flow away from the first joint surface.

4. The post-cast strip sealing structure according to claim 3, characterized in that, The angle of inclination α of the drainage surface from the post-cast strip to the pre-cast beam and slab member is ≤45°.

5. The post-cast strip sealing structure according to claim 3, characterized in that, The post-cast strip sealing structure also includes a waterproof layer, which covers the drainage surface and the upper surface of the post-cast strip along the thickness direction of the pre-cast beam and slab member.

6. The post-cast strip sealing structure according to claim 1, characterized in that, When the water-stopping component is used to stop the water-stopping steel plate, the water-stopping component includes a main plate portion and two wing plate portions. The main plate portion and the two wing plate portions together form a water-stopping space. The opening of the water-stopping space faces one side of the post-cast strip along the first direction; and / or, When the water-stopping element is used to stop the water-stopping steel plate, the water-stopping element extends along the thickness direction of the pre-cast beam and slab component.

7. The post-cast strip sealing structure according to any one of claims 1-6, characterized in that, The pre-cast beam-slab component is a slab or a beam; When the first-cast beam-slab component is a slab, the thickness of the post-cast strip along the thickness direction of the first-cast beam-slab component is equal to the thickness of the first-cast beam-slab component.

8. The post-cast strip sealing structure according to claim 7, characterized in that, When the pre-cast beam-slab component is a beam, the post-cast strip includes a first connecting portion and a second connecting portion along the thickness direction of the pre-cast beam-slab component. The first connecting portion connects between two pre-cast beam-slab components along the first direction. The second connecting portion is located above the first connecting portion along the thickness direction of the pre-cast beam-slab component. The second connecting portion is located on the two first mating surfaces and connects between the two anti-reflector surfaces along the first direction. Along the first direction, the second connecting portion covers the two first mating surfaces.

9. The post-cast strip sealing structure according to claim 8, characterized in that, The first connecting portion is provided with a plurality of first longitudinal bars and a plurality of first stirrups. The first longitudinal bars extend along the first direction. A portion of the first longitudinal bars is disposed within the beam, and another portion of the first longitudinal bars is disposed within the first connecting portion to connect the beam and the first connecting portion. The plurality of first stirrups are spaced apart along the first direction. The first stirrups are configured to fix the plurality of first longitudinal bars. A portion of the first stirrups is disposed within the beam, and another portion of the first stirrups is disposed within the first connecting portion. The second connecting portion is provided with a plurality of second longitudinal bars and a plurality of second stirrups. The second longitudinal bars extend along the first direction and are arranged near the top of the second connecting portion along the thickness direction of the first cast beam-slab member. The plurality of second stirrups are spaced apart along the first direction and are arranged in a one-to-one correspondence with the first stirrups. The second stirrups have openings facing the first cast beam-slab member. The second stirrups extend into the first connecting portion. The portion of the second stirrups extending into the first connecting portion is configured to connect with the first stirrups to fix the second longitudinal bars.

10. The post-cast strip sealing structure according to claim 9, characterized in that, The distance between two adjacent first stirrups located in the first connection portion along the first direction is less than the distance between two adjacent stirrups in the first cast beam-slab member along the first direction.

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