Prefabricated protective groove for post-cast strip

Abstract

The utility model discloses a prefabricated protection groove for a post-cast strip. The protection groove comprises a bottom plate, side plates and reserved steel bars. Two parallel side plates are arranged at the top of the bottom plate, and concrete blocking in the structural concrete pouring process is completed through the side plates; each reserved steel bar penetrates through the two side plates; and before the structural concrete is poured, the reserved steel bars are connected with the steel bars in the structural concrete. The post-cast strip is protected through the assembly type components, protection is formed along with in-place one-time construction of the structure, the forming quality of the post-cast strip is improved, secondary chiseling of the post-cast strip is avoided, and impurities and accumulated water are prevented from entering the post-cast strip.

Description

Technical Field

[0001] This application belongs to the technical field of building construction, and particularly relates to a precast protective groove for post-cast strips. Background Art

[0002] In building design and construction, post-cast strips are often set to prevent structural cracks caused by factors such as uneven settlement of structures, shrinkage of concrete, and temperature difference deformation in super-long structures. There are two types of post-cast strips. One is the temperature post-cast strip, which mainly reduces the shrinkage of the slab structure caused by the hydration reaction of concrete. After the hydration reaction of concrete is completed and the structural deformation is stable, the post-cast strip can be closed, and the time is about 7 - 15 days. The other is the settlement post-cast strip. This structure is used to prevent high and low buildings (between the main building and the podium, or at the change of building areas with different loads). Generally, this type of post-cast strip needs to wait until the building structure is completed, the load is added, and the settlement deformation of both sides of the building is stable before pouring and closing the post-cast strip.

[0003] The post-cast strip is constructed after the structure. The concrete in the post-cast strip part is poured and closed later, but the steel bars must be a continuous whole. After pouring, the integrity of the structure is still ensured. To achieve the post-pouring of concrete, a post-cast strip needs to be reserved. The conventional method uses flexible materials such as wire mesh to tie on both sides of the post-cast strip to intercept the concrete, realizing the blank in the cross-section range of the post-cast strip. Before the construction of pouring the post-cast strip, manual chiseling is carried out again. However, the steel bars are dense at the post-cast strip, and a waterstop steel plate is often set, resulting in difficulty in chiseling the post-cast strip in place, affecting the adhesion between the post-poured concrete and the pre-poured structure. Debris such as wire mesh on the structure and concrete blocks falling into the post-cast strip are not easy to clean. It is not easy to vibrate and compact the lower part of the waterstop steel plate during the pouring of the post-cast strip, and cavities are easily formed. At the same time, the long-term exposure of the post-cast strip is prone to problems such as steel bar corrosion and water accumulation and sediment at the bottom of the slab. The construction quality of the post-poured concrete is difficult to guarantee, and there is a serious risk of leakage. Utility Model Content

[0004] The purpose of this application is to: To solve the problems of great difficulty in post-construction treatment and easy leakage of the post-cast strip, a precast protective groove for the post-cast strip is disclosed. The post-cast strip is protected by an assembled component, and the protection is formed in place during the construction of the structure at one time, improving the forming quality of the post-cast strip, avoiding secondary chiseling of the post-cast strip, and reducing the entry of sundries and water.

[0005] The purpose of this application is achieved through the following technical solutions:

[0006] A precast protective groove for a post-cast strip, the protective groove includes: a bottom plate, side plates, and reserved steel bars;

[0007] Two parallel side plates are provided on the top of the bottom plate, and the concrete barrier during the concrete pouring process of the structure is completed through the side plates;

[0008] Each reserved steel bar penetrates through the two side plates; and before the structural concrete is poured, each reserved steel bar is connected to the steel bars in the structural concrete.

[0009] According to a preferred embodiment, a gap space is provided between the reserved steel bar and the bottom plate, and the gap space serves as a sediment sump.

[0010] According to a preferred embodiment, the surfaces of the bottom plate and the side plates are provided with corrugated structures.

[0011] According to a preferred embodiment, the side plates are perpendicularly arranged with respect to the bottom plate.

[0012] According to a preferred embodiment, the side plates and the bottom plate are of an integrally formed structure.

[0013] According to a preferred embodiment, a plurality of embedded through-steel pipes are further provided on the side plates for post-cast strip pouring before planting steel bars.

[0014] According to a preferred embodiment, a water-stop steel plate is further provided on the side plates on the side of the structural concrete, and the water-stop steel plate is perpendicularly arranged with respect to the side plates.

[0015] According to a preferred embodiment, tenons and mortises are respectively provided on the two end faces of the side plates to realize the stable connection of the side plates between adjacent protective grooves.

[0016] According to a preferred embodiment, a protective cover plate is provided on the top of the protective groove before the post-cast strip is poured.

[0017] According to a preferred embodiment, two parallel grooves are provided on the bottom surface of the protective cover plate, and the tops of the two side plates are respectively clamped in the two grooves of the cover plate.

[0018] According to a preferred embodiment, the middle area of the bottom plate is set as a weak area, and when temperature stress or settlement deformation occurs after the structural concrete on both sides of the post-cast strip is poured, the corresponding weak area can be cracked or crushed.

[0019] The main solution of the present invention and its various further alternative solutions described above can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed by the present invention. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present invention, and all of them are the technical solutions to be protected by the present invention, and will not be enumerated herein.

[0020] Advantages of the present invention:

[0021] In this application, prefabricated components are used for the protection of the post-cast strip, avoiding secondary chiseling of the post-cast strip, forming a rough surface on the contact surface with the cast-in-place concrete, and improving the bonding between the prefabricated components and the post-cast strip.

[0022] By means of measures such as a protective cover plate and a sedimentation tank, this application reduces the entry of accumulated water and sundries into the post-cast strip, and improves the forming quality of the post-cast strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a side view of the protective tank of this application;

[0024] Figure 2 is a schematic three-dimensional structure diagram of the protective tank of this application;

[0025] Figure 3 is a schematic implementation structure diagram of the protective tank of this application;

[0026] Among them, 101 - bottom plate, 102 - side plate, 1021 - tenon, 1022 - mortise, 103 - reserved steel bars, 104 - waterstop steel plate, 105 - embedded through-tube, 106 - sedimentation tank, 107 - drainage perforated pipe, 1 - protective tank, 2 - protective cover plate, 3 - post-cast strip, 4 - leveling layer, 5 - waterproof layer, 6 - protective layer, 7 - structural concrete. SPECIFIC EMBODIMENTS

[0027] The following specifically describes the embodiments of the present utility model through specific examples. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0028] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0030] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not require the components to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] In addition, it should be pointed out in the present invention that in the present invention, if the specifically involved structure, connection relationship, position relationship, power source relationship, etc. are not specifically written, then the structure, connection relationship, position relationship, power source relationship, etc. involved in the present invention are all known to those skilled in the art on the basis of the prior art without creative labor.

[0033] Reference Figures 1 to 3 As shown, the present application discloses a precast protection groove for post-cast strip. The protection groove 1 includes: a bottom plate 101, side plates 102 and reserved steel bars 103.

[0034] Preferably, two parallel side plates 102 are provided on the top of the bottom plate 101, and the concrete barrier during the pouring process of the structural concrete 7 is completed through the side plates 102.

[0035] Preferably, each reserved steel bar 103 penetrates through the two side plates 102, and before the pouring of the structural concrete 7, each reserved steel bar 103 is connected to the steel bars in the structural concrete 7. Each reserved steel bar 103 can be connected to the steel bars in the structural concrete 7 through welding or threaded sleeves.

[0036] Preferably, there is a gap space between the reserved steel bar 103 and the bottom plate 101, and the gap space serves as a sedimentation tank 106.

[0037] Preferably, the surfaces of the bottom plate 101 and the side plates 102 are provided with corrugated structures. Through the setting of the corrugated structures, the surfaces of the bottom plate 101 and the side plates 102 are rough surfaces, so as to improve the connection stability between the corresponding positions and the poured concrete.

[0038] Preferably, the side plates 102 are perpendicularly arranged with the bottom plate 101. Further, the side plates 102 and the bottom plate 101 are of an integrally formed structure.

[0039] By integrally forming the bottom plate 101 and the side plate 102, a post-cast strip is formed into a semi-closed body, avoiding the formation of a through joint between the structure concrete during pouring and the side surface, changing the penetration path of water, extending the penetration route of water, and at the same time isolating the post-cast strip from the groundwater.

[0040] The middle area of the bottom plate 101 is set as a weak area. When the structure concrete 7 on both sides of the post-cast strip 3 is poured and temperature stress or settlement deformation occurs, the corresponding weak area can be cracked or crushed. Thus, the post-cast strip 3 can realize structural deformation and free movement (the deformation amount of the steel bars is greater than that of the concrete).

[0041] Preferably, a number of embedded rebar pipes are also provided on the side plate 102 for supplementing the planted rebar before pouring the post-cast strip 3.

[0042] Preferably, a waterstop steel plate 104 is also provided on the side plate 102 on the side of the structure concrete 7, and the waterstop steel plate 104 is perpendicular to the side plate 102. By setting the waterstop steel plate 104 on the side plate 102, the length of the water seepage path is increased and the risk of water seepage is reduced.

[0043] Preferably, tenons 1021 and mortises 1022 are respectively provided on both end faces of the side plate 102. During the splicing process of a number of protective grooves 1, the side plates 102 between adjacent protective grooves 1 are stably connected, and the connection efficiency is improved.

[0044] The connection of the protective grooves is longitudinally connected by male and female joints. After the connection is completed, the structural steel bars on both sides of the post-cast strip are installed. At this time, the reserved steel bars 103 and the structural steel bars are connected by threading or welding; the upper steel bars pass through the rebar pipes through the embedded rebar pipes 105 to achieve connection. At this time, the protective groove 1 can also be used as a steel bar support to position and support the upper steel bars and stabilize the steel bar framework.

[0045] Preferably, a protective cover plate 2 is provided at the top of the protective groove 1 before pouring the post-cast strip 3.

[0046] Furthermore, two parallel grooves are provided on the bottom surface of the protective cover plate 2, and the tops of the two side plates 102 are respectively clamped in the two grooves of the cover plate.

[0047] The installation construction process of the protective groove in this application is as follows:

[0048] Before installing the precast protective groove of the post-cast strip, according to its width, sinking treatment is carried out in the installation area of the post-cast strip 3 to avoid affecting the structural thickness. At the same time, a sedimentation tank 106 can be formed in the protective groove 1, so that the garbage that is not easy to clean at the bottom can settle in it, without affecting the structural quality. Then, the structural leveling layer 4, waterproof layer 5, and protective layer 6 are completed in sequence, and the precast protective groove 1 of the post-cast strip is installed. Its upper part is higher than the finished surface of the structure by a certain height, which can prevent water accumulation and the like from entering the post-cast strip. After the steel bar binding is completed, the structural concrete 7 is poured for construction. When the structural concrete 7 reaches a certain strength, the protection cover plate 2 is installed at the position of the post-cast strip 3 to prevent garbage from entering the post-cast strip 3. The bottom surface of the protection cover plate 2 is provided with two parallel grooves, making it more stable and non-sliding when placed on the side plate 102 of the precast protective groove. The two sides are set as slopes, facilitating the passage of material transport vehicles through the post-cast strip area, and realizing the pipeline penetration and subsequent water and electricity installation construction processes in the post-cast strip area.

[0049] The protection cover plate 2 can be a precast cover plate or a steel cover plate for recycling. It is connected by tongue-and-groove joints and is higher than the structural plate surfaces on both sides, preventing sewage and mud from flowing into the interior of the post-cast strip. When the post-cast strip is to be closed, only the protection cover plate 2 needs to be opened to carry out the concrete pouring, reducing the complicated and difficult processes such as chiseling and cleaning.

[0050] The sedimentation tank 106 is a cavity with a elevation lower than the bottom plates on both sides of the structure. If sundries enter during the empty window stage of the post-cast strip, they can be placed in the sedimentation tank 106 without being removed, without affecting the structural function.

[0051] The bottom layer of the floor slab 101 is provided with a drain pipe with holes 107. When a small amount of rainwater enters the protective groove 1, it can be drained by using the drain pipe with holes 107. After the post-cast strip is closed, this is a weak link in the structure. When the buoyancy of the groundwater is large in the later stage, there is a risk of water seepage here. This drain pipe with holes 107 can be used as a connecting pipe to unload the pressure and prevent the structural slab from being damaged due to excessive pressure.

[0052] When closing the post-cast strip, the protection cover plate 2 is removed and moved away, and the post-cast strip is filled with slightly expanding high-strength concrete until it is flush with the top of the side plate 102. At this time, the concrete of the post-cast strip is higher than the concrete of the structures on both sides. When making the floor for the structures on both sides, the concrete of the post-cast strip is poured flush again to complete the delivery.

[0053] This application uses prefabricated components for the protection of the post-cast strip, avoiding the secondary chiseling of the post-cast strip, forming a rough surface at the contact surface with the cast-in-place concrete, and improving the adhesion between the prefabricated components and the post-cast strip. Through measures such as the protection cover plate and sedimentation tank, this application reduces the entry of water accumulation and sundries into the post-cast strip and improves the forming quality of the post-cast strip.

[0054] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A precast protective groove for post-cast strip, characterized in that, The protective groove (1) includes: a bottom plate (101), side plates (102), and reserved steel bars (103); On the top of the bottom plate (101), there are two parallel side plates (102), which complete the concrete barrier during the pouring process of the structural concrete (7); Each reserved steel bar (103) penetrates through the two side plates (102); and before the pouring of the structural concrete (7), each reserved steel bar (103) is connected to the steel bars in the structural concrete (7).

2. The post-cast strip precast protection groove according to claim 1, wherein, There is a clearance space between the reserved steel bar (103) and the bottom plate (101), and this clearance space serves as a sedimentation tank (106).

3. The post-cast strip prefabricated protection groove according to claim 1, characterized in that, The surfaces of the bottom plate (101) and the side plates (102) are provided with corrugated structures.

4. The post-cast strip prefabricated protective groove according to claim 3, characterized in that, The side plates (102) are perpendicular to the bottom plate (101).

5. The post-cast strip precast protection groove according to claim 1, wherein The side plates (102) and the bottom plate (101) are of an integrally formed structure.

6. The post-cast strip prefabricated protection groove according to claim 1, wherein Several embedded steel bar pipes (105) are also provided on the side plates for steel bar planting before the pouring of the post-cast strip.

7. The post-cast strip precast protective groove according to claim 1, characterized in that, A water stop steel plate (104) is also provided on the side plate (102) on the side of the structural concrete, and the water stop steel plate (104) is perpendicular to the side plate (102).

8. The post-cast strip precast protective groove according to claim 1, wherein, Tenons (1021) and mortises (1022) are respectively provided on the two end faces of the side plate (102) to achieve stable connection of the side plates between adjacent protective grooves.

9. The post-cast strip precast protection groove according to claim 1, characterized in that, Before the pouring of the post-cast strip, a protective cover plate (2) is provided on the top of the protective groove (1); Two parallel grooves are provided on the bottom surface of the protective cover plate (2), and the tops of the two side plates (102) are respectively clamped in the two grooves of the cover plate (2).

10. The post-cast strip precast protective groove according to claim 9, wherein The middle area of the bottom plate (101) is set as a weak area, and when temperature stress or settlement deformation occurs after the pouring of the structural concrete (7) on both sides of the post-cast strip (3), the corresponding weak area can be cracked or crushed.

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