Precast concrete member and precast concrete assembly

Abstract

The utility model provides a prefabricated concrete member and a prefabricated concrete assembly. The member comprises a body provided with a groove extending in the height direction of the body; the first reinforcing steel bar and the second reinforcing steel bar are fixedly arranged on the two opposite side walls of the groove and / or the two opposite end faces of the opening part of the groove; wherein the first reinforcing steel bar comprises a first free end, the second reinforcing steel bar comprises a second free end, and the first free end and the second free end can move under the action of external force, so that the first reinforcing steel bar and the second reinforcing steel bar are arranged in parallel or at an angle; when the first steel bar and the second steel bar are arranged in parallel, a first gap is formed between the first steel bar and the second steel bar in the height direction of the body. The tie bars in the grooves are replaced by the first steel bars and the second steel bars with the free ends, the same function as the tie bars can be achieved, and the structure and the prefabricating method of the prefabricated formwork are simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building, in particular to a prefabricated concrete component and a prefabricated concrete assembly. BACKGROUND

[0002] The configuration of prefabricated components in prefabricated concrete structures has a great impact on the efficiency and effectiveness of the structure. The performance of the horizontal joints and vertical joints between prefabricated components determines the overall performance of the structure, and the reinforcement connection structure at the joint is the key technology of the assembled monolithic structure. In the prior art, there are generally two schemes for the reinforcement connection technology between prefabricated wallboards of the same layer of assembled monolithic shear walls and other assembled monolithic structures. One is to extend the connecting reinforcement on the side surface of the prefabricated component and set a post-pouring belt for connection, which results in low production, transportation and installation efficiency and poor effectiveness. The other technical scheme is a laminated slab shear wall. Although the prefabricated component does not have reinforcement, a post-pouring belt is still set at the joint, and the construction is relatively complex.

[0003] Patent CN 202111068877.0 discloses a prefabricated concrete component, which has a longitudinal groove in the side wall, and a pair of tie bars are arranged in the longitudinal groove. Each pair of tie bars includes a first tie bar and a second tie bar. The arrangement of the pair of tie bars can clamp the connecting piece.

[0004] The Beijing Local Standard "Design Code for Assembled Shear Wall Structure" (DB11-1003-2022) discloses a hollow slab laminated shear wall structure. The non-edge hollow wallboard end is provided with an open channel (i.e. a longitudinal groove), and the channel is provided with a tie bar. The tie bar ties together the concrete slabs on both sides of the groove and increases the connection integrity of the connecting reinforcement between adjacent prefabricated slabs, which is a key structure to ensure the reliability of the vertical connection between the wallboards.

[0005] In addition, some prefabricated concrete surface-shaped components such as prefabricated floor slabs and prefabricated tower pieces of wind power towers have longitudinal grooves and tie bars arranged on the side surface.

[0006] When manufacturing the prefabricated concrete component disclosed in patent CN 202111068877.0 and the hollow slab laminated shear wall structure disclosed in "Design Code for Assembled Shear Wall Structure" (DB11-1003-2022), the tie bars are anchored in the concrete slabs on both sides of the longitudinal groove, which results in a complex structure of the formwork, especially the formwork of the longitudinal groove, and makes the formwork installation and disassembly difficult, thereby reducing the production efficiency and affecting the quality of the prefabricated wallboard finished product. For example, patent CN 202211313106.8 discloses a prefabricated formwork suitable for side edge groove shear walls. The longitudinal beam (i.e. the mold in the groove) includes an inner module and an outer module. The inner module includes two wedge-shaped blocks that are distributed above and below and can be fitted into a rectangular strip. The outer module has a mounting groove for clamping the tie bars connecting the concrete slabs on both sides of the groove. It can be seen that the prefabricated formwork with a longitudinal groove and tie bars has a complex structure and operation. UTILITY MODEL CONTENT

[0007] To simplify the formwork and molding method of the prefabricated concrete component with a groove and a tie bar arranged between the concrete plates on both sides of the groove, the application provides a prefabricated concrete component, comprising:

[0008] a body having a groove extending in the height direction thereof; and

[0009] a first steel bar and a second steel bar fixedly arranged on the opposite two side walls of the groove and / or the opposite two end faces of the mouth of the groove;

[0010] wherein the first steel bar comprises a first free end, the second steel bar comprises a second free end, the first free end and the second free end can move under the action of an external force, so that the first steel bar and the second steel bar are arranged in parallel or at an angle to each other; when the first steel bar and the second steel bar are arranged in parallel to each other, the first steel bar and the second steel bar have a first gap in the height direction of the body.

[0011] In some embodiments of the application, when the first steel bar and the second steel bar are arranged in parallel to each other, the first steel bar and the second steel bar have a second gap in the length direction of the body.

[0012] In some embodiments of the application, the first steel bar and the second steel bar are straight bars, L-shaped steel bars and / or Z-shaped steel bars, respectively.

[0013] In some embodiments of the application, the groove is located at the end face and / or the middle of the body.

[0014] In some embodiments of the application, the cross section of the groove is U-shaped, L-shaped or trapezoidal.

[0015] In some embodiments of the application, the opposite two side walls of the groove are tooth groove structures.

[0016] In some embodiments of the application, the body is a one-letter type, a T type or an L type.

[0017] The application further provides a prefabricated concrete assembly comprising any of the above prefabricated concrete components.

[0018] In some embodiments of the application, the prefabricated concrete assembly further comprises a stirrup connecting the first steel bar and the second steel bar together.

[0019] In some embodiments of the application, the prefabricated concrete assembly further comprises a short bar welded to the first steel bar and the second steel bar, respectively.

[0020] In some embodiments of the present application, the prefabricated concrete component further comprises a connecting steel bar, the first steel bar and the second steel bar are arranged parallel to each other, and the connecting steel bar is clamped in the first gap.

[0021] In some embodiments of the present application, the prefabricated concrete component further comprises a longitudinal steel bar, the longitudinal steel bar is inserted into the connecting steel bar.

[0022] The prefabricated concrete component provided by the present application replaces the steel bar in the groove with a first steel bar and a second steel bar having free ends, and the first steel bar and the second steel bar are respectively fixed at only one end on the opposite two side walls of the groove and / or the opposite two end faces of the mouth of the groove. Not only can the same effect as the steel bar be achieved, but also the structure of the prefabricated formwork and the prefabrication method are simplified.

[0023] In the prior art, for example, the hollow slab composite shear wall structure described in the Design Regulation of Assembled Shear Wall Structure (DB11-1003-2022) decomposes the steel bar of the non-edge hollow wall plate into a combination of a first steel bar and a second steel bar to facilitate production. The prefabricated concrete component disclosed in patent CN 202111068877.0 can also replace the pair of steel bars with both ends anchored in the side wall of the groove in the longitudinal groove with two steel bars with only one end anchored in the side wall of the groove to achieve the same technical effect. Additional aspects and advantages of the present application will be given in part in the following description, part will become apparent from the following description, or will be understood by those skilled in the art through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of the disclosure, are intended to provide further understanding of the disclosure, and the illustrative embodiments of the disclosure and their description serve to explain the disclosure, and do not constitute improper limitations on the disclosure.

[0025] Figures 1-4 A prefabricated concrete component provided by an embodiment of the present application is shown, wherein Figure 1 and Figure 2 is a perspective view, Figure 3 is a left view, Figure 4 is a partial cross-sectional view.

[0026] Figures 5-7 A prefabricated concrete component provided by another embodiment of the present application is shown, wherein Figure 5 is a perspective view, Figure 6 is a left view, Figure 7 is a top view.

[0027] Figures 8-10 A prefabricated concrete component provided by another embodiment of the present application is shown, wherein Figure 8 is a left view, Figure 9 is a top view, Figure 10is a sectional view corresponding to the U-shaped groove.

[0028] Figures 11-12 A prefabricated concrete component according to another embodiment of the application is shown, Figures 11-12 are each perspective views.

[0029] Figure 13 A prefabricated concrete component according to another embodiment of the application is shown, Figure 13 is a perspective view.

[0030] Figures 14-15 A prefabricated concrete component according to another embodiment of the application is shown, wherein Figure 14 is a perspective view, Figure 15 is a plan view.

[0031] Figure 16 is a schematic view of the production of a prefabricated concrete component according to an embodiment of the application using a mold.

[0032] Figure 17 A prefabricated concrete component according to another embodiment of the application is shown, Figure 17 is a perspective view.

[0033] Figure 18 A prefabricated concrete component according to another embodiment of the application is shown, Figure 18 is a perspective view.

[0034] Figures 19-20 A prefabricated concrete component according to another embodiment of the application is shown, Figures 19-20 are each perspective views.

[0035] Figure 21 A prefabricated concrete component according to another embodiment of the application is shown, Figure 21 is a perspective view.

[0036] Figure 22 A prefabricated concrete component according to another embodiment of the application is shown, Figure 22 is a perspective view.

[0037] Figure 23 A prefabricated concrete component according to another embodiment of the application is shown, Figure 23 is a perspective view.

[0038] Figure 24 A prefabricated concrete component according to another embodiment of the application is shown, Figure 24 is a perspective view.

[0039] Figure 25 A prefabricated concrete component according to another embodiment of the application is shown, Figure 25 is a perspective view.

[0040] Figure 26 This application illustrates a precast concrete component according to another embodiment. Figure 26 This is a 3D image.

[0041] Figures 27-28 This application illustrates a precast concrete component according to another embodiment. Figures 27-28 All are 3D images.

[0042] Figure 29 This application illustrates a precast concrete assembly according to an embodiment of the present application. Figure 29 This is a 3D image.

[0043] Figures 30-31 This application illustrates a precast concrete assembly according to another embodiment. Figures 30-31 All are 3D images.

[0044] Figure 32 This application illustrates a precast concrete assembly according to an embodiment of the present application. Figure 32 This is a 3D image.

[0045] Figure 33 This application illustrates a precast concrete assembly according to an embodiment of the present application. Figure 33 This is a 3D image. Detailed Implementation

[0046] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0047] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and installations are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or installations discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0048] It should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected: can be mechanical connection, can also be electrical connection or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances. In addition, in the drawings, in order to effectively describe the technical content, the thickness, proportion and size of the components are exaggerated or reduced.

[0049] The specific embodiments of the present application are described in more detail below with reference to the accompanying drawings and examples, so that the technical scheme of the present application and the advantages of each aspect thereof can be better understood. However, the specific embodiments described below are for illustrative purposes only, not as a limitation of the present application.

[0050] Figures 1-3 The prefabricated concrete component 100 provided by an embodiment of the present application is shown, which includes a body 110, a first reinforcing bar 120 and a second reinforcing bar 130. The body 110 has a groove 111 extending along its height direction (i.e. the longitudinal direction in the figure), wherein the groove 111 is a through groove. Of course, the groove 111 can also be a non-through groove.

[0051] The groove 111 has opposite two side walls 111a, 111b, and the first reinforcing bar 120 and the second reinforcing bar 130 are fixedly arranged at one end of the opposite two side walls 111a, 111b. The first reinforcing bar 120 includes a first free end 121 and a first fixed end 122, and the second reinforcing bar 130 includes a second free end 131 and a second fixed end 132, wherein the first free end 121 and the second free end 131 can change position under the action of an external force, so that the first reinforcing bar 120 and the second reinforcing bar 130 are arranged parallel to each other or at an angle (i.e. not parallel state).

[0052] Figure 1 The prefabricated concrete component 100 is shown in the state just after being made, and the first reinforcing bar 120 and the second reinforcing bar 130 are respectively attached to the two side walls 111a, 111b. The first reinforcing bar 120 and the second reinforcing bar 130 are tightly attached to the side walls 111a and 111b, so that the inner mold of the groove is not disturbed during the manufacture of the component, and can be a whole columnar body, facilitating installation and disassembly. In other embodiments of the present application, the first reinforcing bar 120 and the second reinforcing bar 130 can also not be parallel to each other in the horizontal plane before assembly. Figure 2The prefabricated concrete component 100 is shown in the state after being made, the first reinforcing steel bars 120 and the second reinforcing steel bars 130 are perpendicular to the two side walls 111a and 111b under the action of external force, at this time, the first reinforcing steel bars 120 and the second reinforcing steel bars 130 are also parallel to each other in the horizontal plane; the first reinforcing steel bars 120 and the second reinforcing steel bars 130 which are parallel to each other are overlapped to play a role of pulling the side walls 111a and 111b, that is, the two are combined into a reinforcing steel bar through overlapping; in addition to playing a role of pulling the side walls 111a and 111b, the first reinforcing steel bars 120 and the second reinforcing steel bars 130 which are parallel to each other are overlapped to form a double reinforcing steel bar structure, so that connecting reinforcing steel bars can be arranged between the double reinforcing steel bar structure. Figure 1 and Figure 2 In the remaining states, the first reinforcing steel bars 120 and the second reinforcing steel bars 130 are in an angular state when moving in the horizontal plane.

[0053] Figure 3 The left view of the prefabricated concrete component 100 is shown in the state shown in Figure 2 Figure 3 The up-down direction in the figure is the height direction of the body described in the present application, the left-right direction is the width direction of the body, and the length direction of the body is the direction perpendicular to the height direction and the width direction shown in the figure.

[0054] As can be seen from Figure 3 , when the first reinforcing steel bars 120 and the second reinforcing steel bars 130 are arranged parallel to each other, the first reinforcing steel bars 120 and the second reinforcing steel bars 130 have a first gap A in the height direction of the body. The gap A can tend to 0, that is, the first reinforcing steel bars 120 and the second reinforcing steel bars 130 are in contact or close to contact; the gap A can be other sizes, and the preferred gap is not greater than 5-10 times the diameter of the first reinforcing steel bars 120 or the second reinforcing steel bars 130; when there are other structural measures, the size of the gap A can be increased according to engineering needs.

[0055] In the present embodiment, when the first reinforcing steel bars and the second reinforcing steel bars are arranged parallel to each other, that is, in the position shown in Figure 1 or Figure 2 , the first reinforcing steel bars 120 and the second reinforcing steel bars 130 have a second gap B in the length direction of the body 110.

[0056] In the present embodiment, the first reinforcing steel bars 120 and the second reinforcing steel bars 130 are respectively provided in multiple numbers. In other embodiments of the present application, the number of the first reinforcing steel bars 120 and the second reinforcing steel bars 130 can be set as needed. In the present embodiment, the lengths of the first reinforcing steel bars 120 and the second reinforcing steel bars 130 are equal, and in other embodiments of the present application, the lengths of the first reinforcing steel bars 120 and the second reinforcing steel bars 130 can also be unequal.

[0057] Figure 4 The left view of the prefabricated concrete component 100 is shown in the state shown in Figures 1-3 ​The first reinforcing steel 120 and the second reinforcing steel 130 of the prefabricated concrete component 100 shown are arranged in the body 110. As shown in the figure Figure 4 It can be seen that the first fixed end 122 and the second fixed end 132 of the first reinforcing steel 120 and the second reinforcing steel 130 are the extension of the internal reinforcing steel of the prefabricated concrete component.

[0058] Figures 5-7 The prefabricated concrete component 200 provided by another embodiment of the present application is shown, which is different from the prefabricated concrete component 100 shown in the figure Figures 1-3 The prefabricated concrete component 100 shown is different in that the cross section of the groove 211 is trapezoidal. In this structure, when the first reinforcing steel 220 and the second reinforcing steel 230 are respectively attached to the two side walls 211a, 211b, it is more convenient to disassemble and assemble the grinding tool; and when the state of being attached to the side wall is adjusted to the state shown in the figure Figure 5 The bending angle of the reinforcing steel is less than 90 degrees, which is more convenient to adjust the reinforcing steel.

[0059] Figures 8-10 The prefabricated concrete component 300 provided by another embodiment of the present application is shown, which is different from the prefabricated concrete component 100 shown in the figure Figures 1-3 The prefabricated concrete component 100 shown is different in that the cross section of the groove 311 is a combination of trapezoidal and U-shaped. The first reinforcing steel 320 and the second reinforcing steel 330 are arranged in the trapezoidal groove area.

[0060] Figures 11-12 The prefabricated concrete component 400 provided by another embodiment of the present application is shown, which is different from the prefabricated concrete component 100 shown in the figure Figures 1-3 The prefabricated concrete component 100 shown is different in that the first reinforcing steel 420 and the second reinforcing steel 430 are fixedly arranged at the two end faces 411c, 411d opposite to the mouth of the groove 411. The first reinforcing steel 420 and the second reinforcing steel 430 can still be attached to the two side walls 411a, 411b of the groove 411 when not assembled, as shown in the figure Figure 12 At this time, in the length direction of the body 410, the first reinforcing steel 420 and the second reinforcing steel 430 no longer have a second gap between them.

[0061] Figure 13 The prefabricated concrete component 500 provided by another embodiment of the present application is shown, which is different from the prefabricated concrete component 400 shown in the figure Figures 11-12 The prefabricated concrete component 400 shown is different in that the first reinforcing steel 520 and the second reinforcing steel 530 are arranged at an angle when just made.

[0062] Figures 14-15 The prefabricated concrete component 600 provided by another embodiment of the present application is shown, which is different from the prefabricated concrete component 500 shown in the figure Figures 11-12The difference in the precast concrete component 400 shown is that the first reinforcing bar 620 and the second reinforcing bar 630 are arranged at an obtuse angle to the body 610 during manufacturing, facing the same side. Thus, when producing precast components, especially when using a flat mold to produce the precast concrete component 600, the first reinforcing bar 620 and the second reinforcing bar 630 are positioned at the junction of the side walls and end faces of the groove (e.g., Figure 15 The inner mold forming the groove can be a complete columnar body, and the other side molds are less affected by the first steel bar 620 and the second steel bar 630.

[0063] Figure 16 This is a schematic diagram illustrating the fabrication of a precast concrete component 600 using molds. Figure 16 As shown, the mold includes a bottom mold D1, side molds C1, C2, and C3, and a columnar inner mold N1. In the construction of the precast concrete component 600, the first reinforcing bar 620 and the second reinforcing bar 630 will not interfere with the inner mold forming the groove. The columnar inner mold N1 is convenient for manufacturing, setting, and removal (i.e., the inner mold is removed when the precast concrete reaches the predetermined strength). The side mold C1 is basically unaffected by the reinforcing bars. Although the side mold C2 is slightly affected, the interference position is exactly at the top of the side mold C2, which can be treated by local grooving, and only has a slight impact on the demolding of the side mold C2.

[0064] Figures 17-18 Two other embodiments of this application provide precast concrete components 700 and 800, which are shown in comparison with... Figures 1-3 The difference between the precast concrete component 100 shown is that the precast concrete component 700 has two sets of first and second reinforcing bars on the same horizontal plane in the groove, while the precast concrete component 800 has three sets of first and second reinforcing bars on the same horizontal plane in the groove.

[0065] Figures 19-21 Two other embodiments of this application provide precast concrete components 900 and 1000, which are shown in comparison with... Figures 1-3 The difference in the precast concrete component 100 shown is that the first and second reinforcing bars are L-shaped. Figures 19-20 In the embodiment shown, the short L-shaped ends of both the first and second reinforcing bars face downwards. Figure 21 In the illustrated embodiment, the short ends of the first and second reinforcing bars are arranged in an L-shape, with one end pointing downwards and the other upwards. Using L-shaped reinforcing bars increases the anchorage performance of the first and second reinforcing bars within the poured concrete, and their overlapping action more effectively provides reinforcement. This structure also enhances the overall integrity between the first and second reinforcing bars, and the allowable size of the first gap A can be selected according to project requirements.

[0066] Figure 22 This application illustrates a precast concrete component 1100 provided in another embodiment of the present application, which is related to... Figures 1-3The difference between the precast concrete component 100 shown in the figure and the precast concrete component 1100 shown in the figure is the shape of the first steel bar and the second steel bar. The first steel bar and the second steel bar of the precast concrete component 1100 respectively have a long section and a short section, the long section extends horizontally, and the short section extends horizontally after being inclined. In this way, the horizontal extension part of the short section of the first steel bar can be connected with the long section of the second steel bar by welding or the like, which is more conducive to realizing the function of the tie bar; and a double-bar structure is formed between the long sections of the first steel bar and the second steel bar. In the present application, the first steel bar and the second steel bar can be straight bars, L-shaped steel bars and / or Z-shaped steel bars, and of course can also be other shapes. The use of such a structure increases the integrity between the first steel bar and the second steel bar, and the allowable size of the first gap A can be selected according to engineering requirements.

[0067] Figures 23-25 The precast concrete components 1200, 1300 and 1400 provided by another embodiment of the present application are shown, which are different from the precast concrete component 100 shown in the figure in that Figures 1-3 The difference between the precast concrete component 100 shown in the figure and the precast concrete component 1200 shown in the figure is the position and shape of the groove. In the precast concrete component 1200, the groove is located in the middle of the body. In the precast concrete component 1300, the groove is located at the end face of the body, but the opening direction is perpendicular to the opening direction of the groove of the precast concrete component 100. In the precast concrete component 1400, the groove is L-shaped. In the present application, the groove can be located at the end face and / or in the middle of the body. In the present application, the cross section of the groove can be U-shaped, L-shaped or trapezoidal, and of course can also be other shapes.

[0068] Figure 26 The precast concrete component 1500 provided by another embodiment of the present application is shown, which is different from the precast concrete component 100 shown in the figure in that Figures 1-3 The difference between the precast concrete component 100 shown in the figure and the precast concrete component 1500 shown in the figure is the shape of the body. The body of the precast concrete component 1500 is T-shaped as a whole. In the present application, the body can be a straight shape, T-shaped or L-shaped or cross-shaped, and of course can also be other shapes.

[0069] Figure 27 、 28 The precast concrete component 1600 provided by another embodiment of the present application is shown, which is different from the precast concrete component 100 shown in the figure in that Figures 1-3 The difference between the precast concrete component 100 shown in the figure and the precast concrete component 1600 shown in the figure is the shape of the two opposite side walls of the groove. In the precast concrete component 1600, the two opposite side walls of the groove are tooth groove structures. In other embodiments of the present application, the two opposite side walls of the groove can also be other shapes.

[0070] The present application further provides a precast concrete assembly, which can include any of the precast concrete components or any combination thereof.

[0071] Figure 29 The precast concrete component 1700 provided by another embodiment of the present application is shown, which is different from the precast concrete component 100 shown in the figure in that Figures 1-3The precast concrete component 100 shown in the figure is different from the precast concrete component 100 shown in the figure in that the C-shaped stirrup 1 is additionally included in the precast concrete component 100. The C-shaped stirrup 1 connects the first steel bar 120 and the second steel bar 130 together. The C-shaped stirrup 1 can strengthen the first steel bar 120 and the second steel bar 130, and better achieve the purpose of combining the first steel bar 120 and the second steel bar 130 into a tension bar. The C-shaped stirrup increases the integrity between the first steel bar 120 and the second steel bar 130, and the first gap A can be increased in size, which can be selected according to the engineering requirements.

[0072] Figure 30 、 31 The precast concrete component 1800 provided by another embodiment of the application is shown. The precast concrete component 1800 is different from the precast concrete component 100 shown in the figure in that the short bar 2 is additionally included in the precast concrete component 100. Figures 1-3 The precast concrete component 1800 provided by another embodiment of the application is shown. The precast concrete component 1800 is different from the precast concrete component 100 shown in the figure in that the short bar 2 is additionally included in the precast concrete component 100.

[0073] Figure 32 The precast concrete component 30 provided by an embodiment of the application is shown. In addition to the precast concrete component 100, the precast concrete component 30 further includes the connecting steel bar 3. The first steel bar 120 and the second steel bar 130 are arranged in parallel with each other, and the connecting steel bar 3 is clamped in the first gap A. The size of the gap A is not less than the diameter of the connecting steel bar 3. The connecting steel bar 3 is used for connecting with other precast concrete components or assemblies.

[0074] Figure 33 The precast concrete component 40 provided by an embodiment of the application is shown. In addition to the precast concrete component 100, the precast concrete component 40 further includes the connecting steel bar 3 and the longitudinal bar 4. The first steel bar 120 and the second steel bar 130 are arranged in parallel with each other, and the connecting steel bar 3 is clamped in the first gap A. The longitudinal bar 4 is connected to one side end of the connecting steel bar 3. In this embodiment, the position of the connecting steel bar 3 can be moved or the angle of the connecting steel bar 3 can be adjusted through the movement of the longitudinal bar 4, so that the outer side of the connecting steel bar can be hidden in the groove and extended out of the groove, thereby facilitating the connection with other precast concrete components or assemblies to make buildings.

[0075] The prefabricated concrete component provided by the application replaces the reinforcing bars in the groove with first reinforcing bars and second reinforcing bars having free ends, and the first reinforcing bars and the second reinforcing bars are respectively arranged at only one end of the opposite two side walls of the groove and / or the opposite two end faces of the mouth of the groove, which not only can play the same role as the reinforcing bars, but also can form double-reinforcing-bar clamping connection reinforcing bars, and in particular, the mold for manufacturing the prefabricated concrete component is simple in structure and convenient for manufacturing the component.

[0076] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation modes are not required or can not be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A precast concrete element, characterized in that The utility model relates to a prefabricated concrete component, comprising: a body having a groove extending along the height direction thereof; and a first reinforcing bar and a second reinforcing bar fixedly arranged on opposite side walls of the groove and / or opposite end faces of the mouth of the groove; wherein the first reinforcing bar comprises a first free end, the second reinforcing bar comprises a second free end, the first free end and the second free end are capable of moving under the action of an external force, so that the first reinforcing bar and the second reinforcing bar are arranged in parallel or at an angle to each other; when the first reinforcing bar and the second reinforcing bar are arranged in parallel to each other, there is a first gap between the first reinforcing bar and the second reinforcing bar in the height direction of the body.

2. A precast concrete element according to claim 1, characterised in that When the first reinforcing bar and the second reinforcing bar are arranged in parallel to each other, there is a second gap between the first reinforcing bar and the second reinforcing bar in the length direction of the body.

3. A precast concrete element according to claim 1, characterised in that The first reinforcing bar and the second reinforcing bar are straight bars, L-shaped reinforcing bars and / or Z-shaped reinforcing bars, respectively.

4. A precast concrete element according to claim 1, characterised in that The groove is located at an end face and / or in the middle of the body; and / or The cross section of the groove is U-shaped, L-shaped or trapezoidal; and / or The opposite side walls of the groove are tooth groove structures.

5. A precast concrete element according to claim 1, characterised in that The body is a straight bar, a T-shaped bar or an L-shaped bar.

6. A precast concrete assembly characterized by, The utility model relates to a prefabricated concrete component.

7. The precast concrete assembly of claim 6, wherein, The utility model further comprises a stirrup connecting the first reinforcing bar and the second reinforcing bar together.

8. The precast concrete assembly of claim 6, wherein, The utility model further comprises a short bar welded to the first reinforcing bar and the second reinforcing bar, respectively.

9. The precast concrete assembly of claim 6, wherein, The utility model further comprises a connecting reinforcing bar, the first reinforcing bar and the second reinforcing bar are arranged in parallel to each other, and the connecting reinforcing bar is clamped in the first gap.

10. The precast concrete assembly of claim 9, wherein, The utility model further comprises a longitudinal reinforcing bar inserted in the connecting reinforcing bar.

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