Novel threaded connection prefabricated concrete frame

Abstract

The utility model provides a novel threaded connection precast concrete frame which is characterized by comprising a plurality of precast concrete columns, and each precast concrete column is composed of an upper-layer precast concrete column and a lower-layer precast concrete column in threaded connection with the upper-layer precast concrete column; the prefabricated concrete beams are arranged on the two transverse sides of the lower-layer prefabricated concrete columns and are in threaded connection with the prefabricated concrete columns; the plurality of precast concrete slabs are respectively arranged on the precast concrete beams; the plurality of post-poured concrete laminated layers are respectively arranged on the precast concrete planks; and the straight thread sleeves are pre-embedded in the connecting parts of the lower-layer precast concrete columns and the precast concrete beams.

Description

Technical Field

[0001] This utility model relates to the technical field of civil engineering, specifically to a novel threaded connection precast concrete frame. Background Technology

[0002] Precast concrete frame structures offer fast construction speed, high quality, and significant savings in formwork and supports, exhibiting remarkable energy-saving and emission-reduction characteristics. They also enable large spans, meeting users' requirements for large open spaces, making them a structural form that aligns with the development needs of industrialized buildings.

[0003] Existing precast concrete frame structure systems include the Shigou system, the PRESS system, and the prestressed precast concrete frame structure system. The Shigou system consists of precast concrete columns, precast prestressed concrete composite beams, and slabs connected by cast-in-place concrete. Its characteristic is that the joints consist of three parts: keyways, U-shaped reinforcing bars, and cast-in-place concrete. The U-shaped reinforcing bars lap with the prestressing tendons at the ends of the precast beams in the keyway, i.e., the plastic hinge zone at the beam ends, facilitating the use of pre-tensioned prestressing technology. The PRESS system uses post-tensioned unbonded prestressing tendons and ordinary reinforcing bars for connection. The prestressing tendons pass through pre-reserved prestressing tendon ducts at the longitudinal centerline of the beam, connecting the two side beams of the column together, and the beam-column joint is filled with mortar. Ordinary reinforcing bars pass through pre-reserved ducts at the upper and lower longitudinal reinforcement positions of the beams and are grouted on-site; unbonded methods can also be used in some sections. The prestressed precast concrete frame structure system is a precast prestressed concrete frame structure system assembled from post-tensioned unbonded prestressed tendons. The beams and columns are all precast concrete components. Prestressed tendons are passed through the reserved holes in the beams and columns, and then prestress is applied.

[0004] In existing precast concrete frame structure systems, the connection between columns is usually achieved by sleeve or welding, which is costly, inconvenient to construct, and requires high precision in component manufacturing. Utility Model Content

[0005] This invention was developed to solve the above-mentioned problems, and its purpose is to provide a novel threaded connection precast concrete frame.

[0006] This utility model provides a novel threaded precast concrete frame, characterized by the following features: multiple precast concrete columns, each precast concrete column consisting of an upper precast concrete column and a lower precast concrete column threadedly connected to the upper precast concrete column; multiple precast concrete beams, respectively disposed on the transverse sides of the upper part of the lower precast concrete columns and threadedly connected to the precast concrete columns; multiple precast concrete slabs, respectively disposed on the precast concrete beams; multiple post-cast concrete composite layers, respectively disposed on the precast concrete slabs; and multiple straight threaded sleeves, pre-embedded in the connection parts of the lower precast concrete columns and precast concrete beams.

[0007] The novel threaded connection precast concrete frame provided by this utility model may also have the following features: the bottom of the upper precast concrete column is provided with multiple upper reserved channels, the interior of the upper reserved channels is provided with upper reserved hand holes, an upper steel pad is provided at the upper reserved hand holes, and a threaded through hole of the upper steel pad is provided in the middle of the upper steel pad; the interior of the lower precast concrete column is provided with multiple reinforcing bars, which extend upward to the outside of the lower precast concrete column to form multiple protruding reinforcing bars, and the multiple protruding reinforcing bars are respectively inserted into each upper reserved channel and upper reserved hand hole.

[0008] The novel threaded precast concrete frame provided by this utility model may also have the following feature: the end of the protruding steel bar near the upper reserved hand hole is provided with a threaded section of the protruding steel bar, which is threadedly connected to the threaded through hole of the upper steel pad.

[0009] The novel threaded precast concrete frame provided by this utility model may also have the following feature: three stirrups are provided within a range of 100mm above and below the upper reserved hand hole.

[0010] The novel threaded precast concrete frame provided by this utility model may also have the following features: it further includes multiple connecting steel bars, the middle section of which is pre-embedded in the lower precast concrete column, corresponding to the position of the straight threaded sleeve, and the two outer sections of the connecting steel bars respectively pass through the corresponding straight threaded sleeve.

[0011] The novel threaded precast concrete frame provided by this utility model may also have the following feature: the outer two ends of the connecting steel bars away from the lower precast concrete column are provided with threaded sections of the connecting steel bars.

[0012] The novel threaded connection precast concrete frame provided by this utility model may also have the following features: multiple precast beam reserved channels are opened at the ends of the precast concrete beams on both sides near the lower precast concrete columns, and there are precast beam reserved hand holes inside the precast beam reserved channels. A steel pad is provided at the precast beam reserved hand hole, and a threaded through hole of the steel pad is opened in the middle. The two outer ends of the connecting steel bars are respectively inserted into the precast beam reserved channels and precast beam reserved hand holes of the precast concrete beams on both sides, and are threadedly connected to the threaded through hole of the steel pad.

[0013] The novel threaded precast concrete frame provided by this utility model may also have the following feature: three stirrups are provided within a 100mm range on the left and right sides of the precast beam's reserved hand hole.

[0014] The novel threaded precast concrete frame provided by this utility model may also have the following feature: the precast concrete column is either a single-layer column or a multi-layer column.

[0015] Functions and effects of utility models

[0016] According to the novel threaded precast concrete frame involved in this utility model, the components are connected by threads and grouted, making it easier to position and install the components during installation, thus improving construction speed. The manufacturing precision requirements for each component are relatively reduced, lowering production costs, minimizing environmental pollution, saving construction time and formwork, and better meeting the needs of residential industrialization. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of the novel threaded connection precast concrete frame in an embodiment of this utility model;

[0018] Figure 2 This is a structural schematic diagram of the connection nodes between the components in the embodiments of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of a precast concrete column in an embodiment of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the precast concrete beam in an embodiment of this utility model.

[0021] Explanation of symbols for main components:

[0022] In the diagram: 100. New type of threaded precast concrete frame; 1. Precast concrete beam; 2. Upper precast concrete column; 3. Lower precast concrete column; 4. Precast concrete slab; 5. Post-cast concrete composite layer; 6. Precast concrete joint area; 7. Upper reserved handhole; 8. Upper reserved duct; 9. Protruding threaded section of reinforcing bar; 10. Upper steel pad; 11. Straight threaded sleeve; 12. Precast beam reserved duct; 13. Lap reinforcing bar; 14. Connecting reinforcing bar; 15. Precast beam reserved handhole; 16. Connecting reinforcing bar threaded section; 17. Steel pad. Detailed Implementation

[0023] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the following embodiments, in conjunction with the accompanying drawings, will specifically illustrate the novel threaded connection precast concrete frame of this utility model.

[0027] Figure 1 This is a structural schematic diagram of the novel threaded precast concrete frame 100 in an embodiment of this utility model.

[0028] like Figure 1 As shown, the novel threaded precast concrete frame 100 in this embodiment includes: multiple precast concrete columns, multiple precast concrete beams 1, multiple precast concrete slabs 4, multiple post-cast concrete composite layers 5, multiple straight threaded sleeves 11, and multiple connecting steel bars 14.

[0029] Each precast concrete column consists of an upper precast concrete column 2 and a lower precast concrete column 3 that is threadedly connected to the upper precast concrete column 2.

[0030] in, Figure 1 The diagram shows a novel threaded precast concrete frame 100 comprising two precast concrete beams 1, three upper precast concrete columns 2, three lower precast concrete columns 3, a precast concrete slab 4, a post-cast concrete composite layer 5, and multiple threaded sleeves 11 and multiple connecting steel bars 14 connecting the precast concrete beams 1 to the lower precast concrete columns 3. In practical applications, the area or size of the novel threaded precast concrete frame 100 can be increased by adding the aforementioned components to form a larger novel threaded precast concrete frame 100, depending on the required arrangement of these components.

[0031] Figure 2 This is a structural schematic diagram of the connection nodes between the components in an embodiment of this utility model.

[0032] like Figure 1-2 As shown, the lapped steel bars 13 of the upper precast concrete column 2 are anchored at the bottom of the column by anchor plates.

[0033] Multiple upper-level reserved channels 8 are opened at the bottom of the upper-level precast concrete column 2 using PVC pipes or metal core molds, and upper-level reserved hand holes 7 are located inside the upper-level reserved channels 8.

[0034] The upper layer has 7 reserved hand holes and an upper layer steel pad 10 is provided, with a threaded through hole in the middle of the upper layer steel pad.

[0035] The lower precast concrete column 3 has multiple reinforcing bars inside, which extend upwards to the outside of the lower precast concrete column 3 to form multiple protruding reinforcing bars. These protruding reinforcing bars are respectively inserted into the upper reserved channels 8 and upper reserved hand holes 7. The end of the protruding reinforcing bar near the upper reserved hand hole 7 is provided with a threaded section 9, which is threadedly connected to the threaded through hole of the upper steel pad and fastened with a nut.

[0036] Three stirrups are installed within a 100mm range above and below the upper-layer reserved handhole 7. The distance from the bottom of the upper-layer reserved handhole 7 to the bottom of the upper-layer precast concrete column 2 is determined by the anchorage length of the lapped reinforcing bars 13. Grouting is required at the joint between the upper-layer precast concrete column 2 and its bottom components, as well as at the upper-layer reserved hole 8. The upper-layer reserved handhole 7 must be filled densely with micro-expansion fine aggregate concrete, and the strength of the fine aggregate concrete must not be lower than that of the precast concrete.

[0037] Multiple precast concrete beams 1 are respectively set on the horizontal sides of the upper part of the lower precast concrete column 3 and threadedly connected to the lower precast concrete column 3.

[0038] The joint where the precast concrete beam 1 connects to the lower precast concrete column 3 is the precast concrete joint area 6.

[0039] On both sides of the precast concrete beam 1, near the lower precast concrete column 3, multiple precast beam reserved channels 12 are opened using PVC pipes or metal core molds. The precast beam reserved channels 12 contain precast beam reserved hand holes 15.

[0040] A steel pad 17 is provided at the pre-reserved hand hole 15 of the precast beam, and a threaded through hole of the steel pad is opened in the middle.

[0041] The straight threaded sleeve 11 is pre-embedded at the connection between the lower precast concrete column 3 and the precast concrete beam 1.

[0042] The middle section of the connecting steel bar 14 is pre-embedded in the lower precast concrete column 3, corresponding to the position of the straight threaded sleeve 11. The two outer sections of the connecting steel bar 14 pass through the corresponding straight threaded sleeve 11 respectively.

[0043] Among them, the outer two ends of the connecting steel bar 14, away from the lower precast concrete column 3, are each provided with a connecting steel bar threaded section 16.

[0044] The two outer ends of the connecting steel bar 14 are respectively inserted into the precast beam reserved duct 12 and the precast beam reserved hand hole 15 of the precast concrete beam 1 on both sides, and are threadedly connected to the threaded through hole of the steel pad and tightened with nuts.

[0045] Three stirrups are installed within a 100mm radius on either side of the precast beam's reserved handhole 15. The distance from the end of the precast beam's reserved handhole 15 closest to the lower precast concrete column 3 to the wall of the lower precast concrete column 3 is determined by the anchorage length of the longitudinal reinforcement in the precast concrete beam 1. Grouting is required at the joint between the lower precast concrete column 3 and the precast concrete beam 1, as well as at the precast beam's reserved hole 12. The precast beam's reserved handhole 15 must be filled densely with micro-expansion fine aggregate concrete, and the strength of the fine aggregate concrete must not be lower than the strength of the precast concrete.

[0046] Multiple precast concrete slabs 4 are respectively placed on the precast concrete beam 1.

[0047] Multiple post-cast concrete composite layers 5 are respectively set on the precast concrete slab 4, and the upper longitudinal reinforcement in the precast concrete beam 1 is located in the multiple post-cast concrete composite layers 5, and is tied on site during the manufacturing process of this utility model.

[0048] The specific manufacturing process of the novel threaded precast concrete frame 100 in this embodiment is as follows:

[0049] S1: Install the lower precast concrete column 3 onto the foundation.

[0050] S2: Erect the precast concrete beams 1 on both sides on temporary supports, and insert the outer ends of the connecting steel bars 14 into the corresponding precast beam reserved holes 12 and precast beam reserved hand holes 15, respectively. By connecting the threaded sections 16 of the connecting steel bars to the threaded through holes of the steel pads, the precast concrete beams 1 are initially installed on the lower precast concrete columns 3.

[0051] S3: Level the precast concrete beams 1 on both sides and align them with the lower precast concrete column 3, then tighten the threaded connections. Fill the pre-drilled handholes 15 in the precast beams with micro-expansion fine aggregate concrete, and grout the joints between the precast concrete beams 1 on both sides and the lower precast concrete column 3, as well as the pre-drilled holes 12 in the precast beams.

[0052] S4: Place the precast concrete slab 4 on the precast concrete beams 1 on both sides and the temporary support, and adjust the overlap length of the precast concrete slab 4 and the precast concrete beams 1 as well as the overall size of the precast concrete slab 4.

[0053] S5: Tie the upper longitudinal reinforcement bars in the precast concrete beam 1, tie the reinforcement bars set in the post-cast concrete composite layer 5, and pour the post-cast concrete composite layer 5 on site. After the concrete strength of the post-cast concrete composite layer 5 reaches 50% of the design strength, hoist the upper precast concrete column 2.

[0054] S6: Insert the protruding reinforcing bars of the lower precast concrete column 3 into the upper reserved duct 8 and the upper reserved hand hole 7. Connect the threaded section 9 of the protruding reinforcing bar to the threaded through hole of the upper steel plate, so that the upper precast concrete column 2 is initially installed on the lower precast concrete column 3.

[0055] S7: Fill the upper-layer pre-reserved handhole 7 with micro-expansion fine aggregate concrete, and grout the joint between the upper-layer precast concrete column 2 and the lower-layer precast concrete column 3, as well as the upper-layer pre-reserved channel 8. Continue in this manner to complete the construction of the precast concrete frame.

[0056] Functions and effects of the embodiments

[0057] According to the novel threaded precast concrete frame 100 involved in this embodiment, the components are connected by threads and grouted, making it easier to position and install the components during installation, thus improving construction speed. The manufacturing precision requirements of each component are relatively reduced, lowering production costs, reducing environmental pollution, saving construction time and formwork, and better meeting the needs of residential industrialization.

[0058] This application has outstanding load-bearing capacity and ductility, and can be applied to large-span residential buildings, public buildings and industrial plants, etc. It is in line with my country's development strategy of green building and industrialized building, and has a very broad application prospect.

[0059] In this application, the connection between the precast concrete beam 1 and the lower precast concrete column 3 is achieved by inserting the outer ends of the connecting steel bars 14 pre-embedded on the lower precast concrete column 3 into the corresponding pre-reserved holes 12 and hand holes 15 of the precast beam, respectively, and then connecting them through the threaded sections 16 of the connecting steel bars and the threaded through holes of the steel plate. Compared with the traditional connection method of inserting the longitudinal bars extending from both sides of the concrete beam into other components, the precast concrete beam 1 does not have longitudinal bars extending from both sides in the transverse direction, which reduces the overall length, facilitates transportation, and improves the transportation efficiency of precast components.

[0060] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel threaded precast concrete frame, characterized in that, include: Multiple precast concrete columns, each of which consists of an upper precast concrete column and a lower precast concrete column that is threadedly connected to the upper precast concrete column. Multiple precast concrete beams are respectively set on both sides of the upper part of the lower precast concrete column and threadedly connected to the lower precast concrete column. Multiple precast concrete slabs are respectively disposed on the precast concrete beam; Multiple layers of post-cast concrete are respectively disposed on the precast concrete slab; Multiple straight threaded sleeves are pre-embedded at the connection points between the lower precast concrete column and the precast concrete beam.

2. The novel threaded precast concrete frame according to claim 1, characterized in that: in, The bottom of the upper precast concrete column is provided with multiple upper-layer reserved channels, and the interior of each upper-layer reserved channel contains an upper-layer reserved hand hole. An upper steel pad is provided at the reserved hand hole on the upper layer, and a threaded through hole for the upper steel pad is opened in the middle of the plate. The lower precast concrete column has multiple reinforcing bars inside, which extend upward to the outside of the lower precast concrete column to form multiple protruding reinforcing bars. The multiple protruding reinforcing bars are respectively inserted into the upper reserved channels and the upper reserved hand holes.

3. The novel threaded precast concrete frame according to claim 2, characterized in that: in, The end of the protruding reinforcing bar near the upper reserved hand hole is provided with a protruding reinforcing bar threaded section, which is threadedly connected to the threaded through hole of the upper steel pad.

4. The novel threaded precast concrete frame according to claim 2, characterized in that: in, Three stirrups are provided within a 100mm range above and below the upper reserved hand hole.

5. The novel threaded precast concrete frame according to claim 1, characterized in that, Also includes: Multiple connecting steel bars, The middle section of the connecting steel bar is pre-embedded in the lower precast concrete column, corresponding to the position of the straight threaded sleeve, and the two outer sections of the connecting steel bar pass through the corresponding straight threaded sleeve.

6. The novel threaded precast concrete frame according to claim 5, characterized in that: in, The outer two ends of the connecting steel bars, away from the lower precast concrete column, are each provided with a threaded section of the connecting steel bar.

7. The novel threaded precast concrete frame according to claim 6, characterized in that: in, Multiple precast beam reserved channels are provided at the ends of the precast concrete beams on both sides near the lower precast concrete columns. Each of these reserved channels contains a precast beam handhole. A steel pad is provided at the pre-reserved hand hole of the precast beam, and a threaded through hole for the steel pad is opened in the middle of the beam. The two outer ends of the connecting steel bars are respectively inserted into the precast beam reserved ducts and precast beam reserved hand holes of the precast concrete beams on both sides, and are threadedly connected to the threaded through holes of the steel pad plate.

8. The novel threaded precast concrete frame according to claim 7, characterized in that: in, Three stirrups are provided within 100mm to the left and right of the pre-reserved handhole in the precast beam.

9. The novel threaded precast concrete frame according to claim 1, characterized in that: The precast concrete column can be a single-story column or a multi-story column.

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