An assembled concrete elevator shaft and its assembly method

Abstract

The present invention discloses a prefabricated concrete elevator shaft and its assembly method. The elevator shaft includes several layers of elevator shaft units, and the adjacent two layers of elevator shaft units are butt-jointed and fixed through vertical steel bar grouting anchor joints; the elevator shaft unit includes a precast member without a hole and a precast member with a hole that are connected at both ends. The two ends of the precast member without a hole and the precast member with a hole are fixedly connected by vertical post-cast concrete, and the top surface is fixedly connected by post-cast concrete of a concealed beam. The present invention can realize the prefabrication and assembly of the elevator shaft, reduce the on-site post-cast concrete operation, and improve the installation quality and efficiency of the steel bar butt-joint joints.

Description

Technical Field

[0001] The present invention belongs to the technical field of precast concrete structures, and particularly relates to a precast concrete elevator shaft and an assembly method thereof. Background Art

[0002] The concept of "equivalent to cast-in-place" is generally implemented in precast concrete shear wall structures. To ensure the structural integrity and seismic performance, for elevator shaft components, considering the seismic requirements and the limitations of on-site hoisting equipment capabilities, cast-in-place concrete structures are usually adopted, which cannot fully utilize the advantages of precast concrete technology. At the same time, it also causes a large amount of wet work for on-site concrete pouring, which is not conducive to ensuring quality and improving efficiency.

[0003] In addition, currently, the vertical steel bar connection in precast concrete shear wall structures generally uses grouting connections for steel sleeves. Due to the restrictions of its technical characteristics, it poses high requirements for component prefabrication and installation accuracy, material properties, and worker quality, resulting in frequent quality problems and doubts about the structural performance. If it is applied to precast concrete elevator shafts, due to the large amount of steel reinforcement in the elevator shafts, the vertical steel bars may be denser than those of general shear walls, and the quality hidden dangers will be more prominent.

[0004] Therefore, to promote the scientific and healthy development of precast concrete shear wall structures, it is urgent to seek new precast concrete elevator shaft structure technologies, break through the technical shackles of fully cast-in-place elevator shafts, minimize on-site post-cast concrete operations, fully utilize the advantages of precast concrete technology, and ensure the overall structural performance. At the same time, it is necessary to explore new reliable steel bar connection methods to avoid the technical problems of high precision requirements and difficult installation and construction of the steel sleeve grouting connection method, and improve prefabrication and installation efficiency. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a precast concrete elevator shaft and an assembly method thereof, realizing the prefabrication and assembly of the elevator shaft, reducing on-site post-cast concrete operations, and improving the installation quality and efficiency of steel bar butt joints.

[0006] The present invention provides the following technical solutions:

[0007] A precast concrete elevator shaft includes a plurality of layers of elevator shaft units, and the adjacent two layers of elevator shaft units are butt-joined and fixed through vertical steel bar grouting anchor butt joints.

[0008] The elevator shaft unit includes a precast member without a hole and a precast member with a hole that are connected at both ends. The two ends of the precast member without a hole and the precast member with a hole are fixedly connected by vertical post-cast concrete, and the top surface is fixedly connected by post-cast concrete of the concealed beam.

[0009] Preferably, the precast member without a hole and the precast member with a hole include a member body and a number of vertical butt joint steel bars penetrating through the member body. A number of steel bar butt joint assemblies are provided below the interior of the member body. The top ends of the vertical butt joint steel bars extend out of the upper surface of the member body, and the bottom ends are inserted into the steel bar butt joint assemblies. When the upper and lower elevator shaft tube units are butt-jointed and fixed to each other, the top ends of the lower vertical butt joint steel bars are inserted into the steel bar butt joint assemblies of the upper layer and butt-jointed and fixed to the bottom ends of the vertical butt joint steel bars, forming a vertical steel bar grouting anchor butt joint.

[0010] Preferably, the vertical butt joint steel bars are upset bars.

[0011] Preferably, the steel bar butt joint assembly includes a corrugated pipe and a steel bar cage provided on the periphery of the corrugated pipe. The vertical butt joint steel bars and the lower vertical butt joint steel bars are respectively inserted and butt-jointed and fixed from the upper and lower ends of the corrugated pipe. When butt-jointed and fixed, the corrugated pipe is filled with grouting material.

[0012] Preferably, the steel bar cage includes stirrup bars and spiral bars fixedly connected. The stirrup bars are arranged parallel to the vertical butt joint steel bars, and the spiral bars are spirally wound around the outer periphery of the corrugated pipe.

[0013] Preferably, the cross-sectional shapes of the precast member without a hole and the precast member with a hole are U-shaped or L-shaped.

[0014] Preferably, horizontal distribution steel bars are embedded in the member body of the precast member without a hole and the precast member with a hole. The horizontal distribution steel bars extend out from both ends of the member body. Horizontal connecting steel bars are tied at the intersection of both ends of the precast member without a hole and the precast member with a hole and lapped with the extended parts of the horizontal distribution steel bars.

[0015] Preferably, vertical lapping steel bars are tied at the intersection of both ends of the precast member without a hole and the precast member with a hole. The top ends of the vertical lapping steel bars extend out from the upper surface of the member body of the precast member without a hole and the precast member with a hole, and the bottom ends are lapped with the extended parts of the lower vertical lapping steel bars.

[0016] Preferably, longitudinal bars and stirrups of the concealed beam are tied on the top surface of the precast member without a hole and the precast member with a hole, and the post-cast concrete of the concealed beam is poured to form a closed ring beam.

[0017] An assembling method for an assembled concrete elevator shaft tube includes the following steps:

[0018] Produce precast members without a hole and precast members with a hole;

[0019] A grouting layer is set on the top surface of the completed elevator shaft unit at the lower layer, and the precast members without openings and the precast members with openings are installed in place, so that the vertical butt joint steel bars at the lower layer are inserted into the steel bar butt joint assembly at the corresponding position of the upper layer;

[0020] Grouting material is poured into the steel bar butt joint assembly to fix the vertical butt joint steel bars at the upper layer and the vertical butt joint steel bars at the lower layer in butt joint, forming a vertical steel bar grouting anchor butt joint and a vertical connection;

[0021] Vertical post-cast concrete is poured at the intersection of the two ends of the precast member without opening and the precast member with opening, and concealed beam post-cast concrete is poured on the top surface to form a horizontal connection;

[0022] Repeat the above steps to butt-joint and fix several layers of elevator shaft units to complete the assembly of the concrete elevator shaft.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] (1) The precast concrete elevator shaft provided by the present invention includes several layers of elevator shaft units. The adjacent two layers of elevator shaft units are butt-jointed and fixed through vertical steel bar grouting anchor butt joints, with reliable connection, high installation efficiency. And due to its larger aperture and longer grouting anchor length, its quality is better than that of steel sleeve grouting connection and the cost is lower;

[0025] (2) The elevator shaft unit in the present invention includes a precast member without opening and a precast member with opening connected at both ends. A fixed connection is formed by vertical post-cast concrete at the intersection of the two ends of the precast member without opening and the precast member with opening, and a fixed connection is formed by concealed beam post-cast concrete on the top surface, which can realize the continuous force transmission of the horizontal distribution steel bars in the member and form an integral elevator shaft structure based on this;

[0026] (3) The precast concrete elevator shaft and its assembly method provided by the present invention realize the precast assembly of the elevator shaft, reduce the on-site post-cast concrete operation, and form a precast elevator shaft structure with reliable seismic performance and obvious precast advantages, having a prospect of large-scale popularization and application. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of a precast concrete elevator shaft;

[0028] Figure 2 is a schematic structural diagram of a precast member without opening;

[0029] Figure 3 is a schematic structural diagram of a precast member with opening;

[0030] Figure 4 is a schematic structural diagram of a steel bar butt joint assembly;

[0031] Figure 5 It is a structural schematic diagram of a steel reinforcement cage;

[0032] In the figure, the markings are: 1. Completed elevator shaft unit on the lower layer; 2. Vertical butt joint steel bars; 3. Lower layer vertical lapped steel bars; 4. Grout layer; 5. Prefabricated component without opening; 6. Prefabricated component with opening; 7. Lower layer vertical butt joint steel bars; 8. Corrugated pipe; 9. Lapped steel bars; 10. Spiral steel bars; 11. Grouting material; 12. Horizontal distribution steel bars; 13. Horizontal connecting steel bars; 14. Vertical lapped steel bars; 15. Vertical post-cast concrete; 16. Longitudinal bars of the concealed beam; 17. Stirrups of the concealed beam; 18. Post-cast concrete of the concealed beam. Specific embodiments

[0033] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and should not be used to limit the protection scope of the present invention.

[0034] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "up", "down", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0035] As Figure 1 shown, an assembled concrete elevator shaft includes several layers of elevator shaft units, and the adjacent two layers of elevator shaft units are butt-jointed and fixed through vertical steel bar grout-anchored butt joints; the elevator shaft unit includes a prefabricated component without opening 5 and a prefabricated component with opening 6 connected at both ends. A fixed connection is formed by vertical post-cast concrete 15 at the intersection of the two ends of the prefabricated component without opening 5 and the prefabricated component with opening 6, and a fixed connection is formed by post-cast concrete 18 of the concealed beam at the top surface.

[0036] As Figure 1 and 3 shown, the prefabricated component without opening 5 and the prefabricated component with opening 6 include a component body and several vertical butt joint steel bars 2 penetrating through the component body. Several steel bar butt joint assemblies are provided below the interior of the component body. The top end of the vertical butt joint steel bar 2 extends out of the upper surface of the component body, and the bottom end is inserted into the steel bar butt joint assembly; when the upper and lower layers of elevator shaft units are butt-jointed and fixed, the top end of the lower layer vertical butt joint steel bar 7 is inserted into the steel bar butt joint assembly of the upper layer and butt-jointed and fixed with the bottom end of the vertical butt joint steel bar 2 to form a vertical steel bar grout-anchored butt joint.

[0037] As Figure 1As shown in FIGS. 4 and 5, the vertical butt joint steel bars 2 are upset steel bars, which can reduce the length of the steel bar grouting anchor, thus saving materials. The steel bar butt joint assembly includes a corrugated pipe 8 and a steel reinforcement cage arranged on the periphery of the corrugated pipe 8. The vertical butt joint steel bars 2 and the lower layer vertical butt joint steel bars 7 are respectively inserted into the upper and lower ends of the corrugated pipe 8 for butt joint fixation. When butt joint fixation is carried out, the corrugated pipe 8 is filled with grouting material 11; the steel reinforcement cage includes a tie bar 9 and a spiral bar 10 fixedly connected. The tie bar 9 is arranged parallel to the vertical butt joint steel bar 2, and the spiral bar 10 is spirally wound around the outer periphery of the corrugated pipe 8; using the embedded corrugated pipe 8 as the hole-retaining material is economical and convenient. The steel reinforcement cage composed of the tie bar 9 and the spiral bar 10 is simple to manufacture and can realize the continuous force transmission of the vertical steel bar grouting anchor butt joint.

[0038] As Figures 1 to 3 shown, the cross-sectional shapes of the precast member 5 without a hole and the precast member 6 with a hole are U-shaped or L-shaped, and the member form can be selected according to the actual situation to improve the precast and installation efficiency. In this embodiment, it is U-shaped.

[0039] As Figures 1 to 3 shown, horizontal distribution steel bars 12 are embedded in the precast member 5 without a hole and the precast member 6 with a hole, and the horizontal distribution steel bars 12 extend from both ends of the member body; horizontal connecting steel bars 13 are tied at the intersection of both ends of the precast member 5 without a hole and the precast member 6 with a hole, and overlap with the extended parts of the horizontal distribution steel bars 12 to improve the horizontal connection strength of the precast member 5 without a hole and the precast member 6 with a hole.

[0040] As Figures 1 to 3 shown, vertical lapping steel bars 14 are tied at the intersection of both ends of the precast member 5 without a hole and the precast member 6 with a hole. The top ends of the vertical lapping steel bars 14 extend from the upper surface of the precast member 5 without a hole and the precast member 6 with a hole, and the bottom ends overlap with the extended parts of the lower layer vertical lapping steel bars 3 to improve the horizontal connection strength of the precast member 5 without a hole and the precast member 6 with a hole.

[0041] As Figure 1 shown, longitudinal bars 16 and stirrups 17 of the concealed beam are tied on the top surfaces of the precast member 5 without a hole and the precast member 6 with a hole, and the post-cast concrete 18 of the concealed beam is poured to form a closed ring beam, further strengthening the integrity of the elevator shaft structure.

[0042] As Figures 1 to 5 shown, this embodiment also provides an assembly method for an assembled concrete elevator shaft, including the following steps:

[0043] 1) Produce the precast member 5 without a hole and the precast member 6 with a hole near the factory or the construction site. Embed the corrugated pipe 8 under the inside of the member body, and set the tie bar 9 and the spiral bar 10 on its outer side;

[0044] 2) Set a grouting layer 4 on the top surface of the completed elevator shaft unit 1 on the lower layer, install the precast component 5 without a hole and the precast component 6 with a hole in place, and insert the vertical butt joint reinforcement 7 on the lower layer into the corrugated pipe 8 at the corresponding position on the upper layer;

[0045] 3) Pour high-strength grouting material 11 into the corrugated pipe 8 to fix the vertical butt joint reinforcement 2 on the upper layer and the vertical butt joint reinforcement 7 on the lower layer in butt joint, forming a vertical steel bar grouting anchor butt joint and a vertical connection;

[0046] 4) Tie the vertical lapping reinforcement 14 and the horizontal connecting reinforcement 13 at the intersection of the two ends of the precast component 5 without a hole and the precast component 6 with a hole, lap them with the extended parts of the vertical lapping reinforcement on the lower layer and the extended parts of the horizontal distribution reinforcement 12 respectively, and pour the vertical post-cast concrete 15 to form a horizontal connection;

[0047] 5) Tie the longitudinal bars 16 and stirrups 17 of the concealed beam on the top surface of the precast component 5 without a hole and the precast component 6 with a hole, and pour the post-cast concrete 18 of the concealed beam to form a closed ring beam;

[0048] 6) Repeat the above steps to butt-join and fix several layers of elevator shaft units to complete the assembly of the concrete elevator shaft.

[0049] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An assembled concrete elevator shaft, characterized in that, It includes several layers of elevator shaft units, and the adjacent two layers of elevator shaft units are butt-jointed and fixed through vertical steel bar grouting anchor joints; The elevator shaft unit includes a precast member without a hole and a precast member with a hole that are connected at both ends. The two ends of the precast member without a hole and the precast member with a hole are fixedly connected by vertical cast-in-place concrete, and the top surface is fixedly connected by cast-in-place concrete of a concealed beam; The precast member without a hole and the precast member with a hole include a member body and several vertical butt-jointed steel bars penetrating through the member body. Several steel bar butt-joint assemblies are arranged below the interior of the member body. The top end of the vertical butt-jointed steel bar extends out of the upper surface of the member body, and the bottom end is inserted into the steel bar butt-joint assembly; When the upper and lower layers of elevator shaft units are butt-jointed and fixed, the top end of the vertical butt-jointed steel bar in the lower layer is inserted into the steel bar butt-joint assembly in the upper layer and is butt-jointed and fixed with the bottom end of the vertical butt-jointed steel bar to form a vertical steel bar grouting anchor joint; The vertical butt-jointed steel bar adopts a headed steel bar; the steel bar butt-joint assembly includes a corrugated pipe and a steel bar cage arranged on the periphery of the corrugated pipe. The vertical butt-jointed steel bar and the vertical butt-jointed steel bar in the lower layer are respectively inserted and butt-jointed and fixed from the upper and lower ends of the corrugated pipe. When butt-jointed and fixed, the corrugated pipe is filled with grouting material.

2. The prefabricated concrete elevator shaft according to claim 1, wherein The steel bar cage includes a tie bar steel bar and a spiral steel bar that are fixedly connected. The tie bar steel bar is arranged parallel to the vertical butt-jointed steel bar, and the spiral steel bar is spirally wound around the outer periphery of the corrugated pipe.

3. The prefabricated concrete elevator shaft according to claim 1, characterized in that, The cross-sectional shape of the precast member without a hole and the precast member with a hole is U-shaped or L-shaped.

4. The prefabricated concrete elevator shaft according to claim 1, characterized in that, Horizontal distribution steel bars are embedded in the member body of the precast member without a hole and the precast member with a hole, and the horizontal distribution steel bars extend out from both ends of the member body; horizontal connecting steel bars are tied at the intersection of the two ends of the precast member without a hole and the precast member with a hole and are lapped with the extended parts of the horizontal distribution steel bars.

5. The prefabricated concrete elevator shaft according to claim 1, characterized in that, Vertical lapping steel bars are tied at the intersection of the two ends of the precast member without a hole and the precast member with a hole. The top end of the vertical lapping steel bar extends out of the upper surface of the member body of the precast member without a hole and the precast member with a hole, and the bottom end is lapped with the extended part of the vertical lapping steel bar in the lower layer.

6. The prefabricated concrete elevator shaft according to claim 1, wherein Concealed beam longitudinal steel bars and concealed beam stirrups are tied on the top surface of the precast member without a hole and the precast member with a hole, and the cast-in-place concrete of the concealed beam is poured to form a closed ring beam.

7. The assembling method of the prefabricated concrete elevator shaft according to any one of claims 1 to 6, characterized in that, It includes the following steps: Produce precast members without holes and precast members with holes; Set a mortar layer on the top surface of the completed elevator shaft unit in the lower layer, install the precast member without a hole and the precast member with a hole in place, and insert the vertical butt-jointed steel bar in the lower layer into the steel bar butt-joint assembly at the corresponding position in the upper layer; Pour grouting material into the steel bar butt-joint assembly to butt-joint and fix the vertical butt-jointed steel bar in the upper layer and the vertical butt-jointed steel bar in the lower layer, form a vertical steel bar grouting anchor joint, and form a vertical connection; Pour vertical cast-in-place concrete at the intersection of the two ends of the precast member without a hole and the precast member with a hole, and pour cast-in-place concrete of the concealed beam on the top surface to form a horizontal connection; Repeat the above steps to butt-joint and fix several layers of elevator shaft units to complete the assembly of the concrete elevator shaft.

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