Quickly constructed precast slab column foundation and connecting construction method thereof

Abstract

The invention relates to the technical field of prefabricated plate columns, in particular to a rapid construction prefabricated plate column foundation and a connecting construction method thereof.The rapid construction prefabricated plate column foundation comprises a prefabricated bottom plate and a prefabricated main column, the prefabricated main column is in a big-end-up T shape and located at the top of the prefabricated bottom plate, and a high-performance concrete pouring area is formed between the lower portion of the prefabricated main column and the prefabricated bottom plate; an upper vertical main reinforcement and a lower vertical main reinforcement are correspondingly arranged on the upper portion and the lower portion of the prefabricated main column and the prefabricated bottom plate, the outer ends of the upper vertical main reinforcement and the lower vertical main reinforcement are located in the high-performance concrete pouring area, and the upper vertical main reinforcement and the lower vertical main reinforcement are connected together through a connecting piece. The energy-consuming steel bar has the advantages that the low-yield steel bars are connected between the upper short steel bars and the lower short steel bars through the connecting pieces and can yield earlier than common steel bars under the action of earthquake loads, the purpose of energy consumption is achieved, the high-performance concrete can exert certain bearing capacity under the action of earthquakes, rapid cracking and damage are avoided, and due to the compact structure and high durability, the energy-consuming steel bar can be recycled. And the internal structure can be protected from being corroded.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated assembly plate columns, in particular to a fast-construction prefabricated plate column foundation and a connection construction method thereof. Background Art

[0002] With the improvement of my country's industrialization level, the industrialization of line foundations has gradually become a hot direction for the development of current infrastructure projects. As the basic vertical component that transmits the load of the upper structure downward, the main column is usually large in size and uses a large amount of material. The use of prefabricated assembled base plates and main columns is of great significance for reducing on-site workload and accelerating line foundation construction. Conventional assembled plate-column foundations mostly use the grouting sleeve process. The shortcomings of this type of technology are: the force transmission of the longitudinal steel bars depends to a large extent on the quality of grouting, and due to the limitations of construction conditions, the grouting quality in actual projects is extremely unstable, which brings certain obstacles to the transfer of load to the foundation, and then affects the transfer of load from the foundation to the foundation, which is not conducive to the long-term operation of the line. Summary of the Invention

[0003] The present invention provides a method for quickly constructing a prefabricated slab-column foundation and its connection structure, which overcomes the shortcomings of the above-mentioned existing technologies. The effective transmission of force of the longitudinal steel bars depends to a large extent on the quality of grouting. However, due to the limitations of construction conditions, the grouting quality in actual projects is extremely unstable, which brings certain obstacles to the transfer of load from the foundation, and further affects the problem of the transfer of load from the foundation to the foundation.

[0004] One of the technical solutions of the present invention is achieved through the following measures: a fast-construction prefabricated slab-column foundation, a prefabricated bottom plate and a prefabricated main column, the prefabricated main column is T-shaped with a larger top and a smaller bottom, the prefabricated main column is located on the top of the prefabricated bottom plate, and a high-performance concrete pouring area is formed between the lower part of the prefabricated main column and the prefabricated bottom plate, upper vertical main bars and lower vertical main bars with their outer ends located in the high-performance concrete pouring area are provided correspondingly on the upper and lower parts of the prefabricated main column and the prefabricated bottom plate, the upper vertical main bars and the lower vertical main bars are connected together by connecting pieces, upper short steel bars and lower short steel bars are provided correspondingly on the upper and lower parts of the prefabricated main column and the prefabricated bottom plate outside the upper vertical main bars and the lower vertical main bars, low-yield steel bars are connected between the upper short steel bars and the lower short steel bars by connecting pieces, and high-performance concrete is poured in the high-performance concrete pouring area.

[0005] The following are further optimizations and / or improvements to the above technical solutions: A boss is provided on the outer side of the lower part of the prefabricated main column, and the upper part of the upper short steel bar is located in the boss.

[0006] The connecting piece is a double-thread sleeve.

[0007] The outer side surface of the lower part of the above-mentioned prefabricated main column is rough.

[0008] The second technical solution of the present invention is achieved through the following measures: a connection construction method for quickly constructing a prefabricated slab-column foundation, first hoisting the prefabricated main column into place on the top of the prefabricated base plate, accurately positioning it and then releasing the hoisting, then connecting and fixing the upper vertical main reinforcement and the lower vertical main reinforcement through connectors, and then fixing the upper short steel bars and the lower short steel bars to the low-yield steel bars through connectors, and finally, closing the high-performance concrete pouring area with a formwork, and pouring the high-performance concrete pouring area with high-performance concrete.

[0009] The present invention has a reasonable and compact structure, and has the following beneficial effects: 1. Low-yield steel bars are connected between the upper short steel bars and the lower short steel bars through connecting pieces, which can yield before ordinary steel bars under the action of seismic loads, thereby achieving the purpose of energy consumption; 2. The high-performance concrete pouring section is poured with high-performance concrete, which has high tensile strength and can exert a certain bearing capacity under the action of earthquakes without rapid cracking and damage; 3. The high-performance concrete pouring section is poured with high-performance concrete, which has a dense structure and high durability, and can protect the internal structure from corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the main cross-sectional structure of Example 1 of the present invention.

[0011] The numbers in the figure are: 1. Precast base plate, 2. Precast main column, 3. High-performance concrete pouring area, 4. Upper vertical main reinforcement, 5. Lower vertical main reinforcement, 6. Upper short steel bars, 7. Lower short steel bars, 8. Low-yield steel bars, 9. Boss, 10. Double-thread sleeve. DETAILED DESCRIPTION

[0012] In the present invention, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 The positional relationships of front, back, top, bottom, left, and right are described in the layout of the manual. Figure 1 The layout direction is determined by the

[0013] The present invention will be further described below in conjunction with the embodiments and accompanying drawings: Example 1: Figure 1As shown, the fast-construction prefabricated slab-column foundation includes a prefabricated base plate 1 and a prefabricated main column 2. The prefabricated main column 2 is T-shaped with a larger upper portion and a smaller lower portion. The prefabricated main column 2 is located at the top of the prefabricated base plate 1. A high-performance concrete pouring area 3 is formed between the lower portion of the prefabricated main column 2 and the prefabricated base plate 1. Upper vertical main reinforcement 4 and lower vertical main reinforcement 5, whose outer ends are located in the high-performance concrete pouring area 3, are provided on the prefabricated main column 2 and the prefabricated base plate 1 respectively. The upper vertical main reinforcement 4 and the lower vertical main reinforcement 5 are connected together by connecting pieces. Upper short steel bars 6 and lower short steel bars 7 are provided on the prefabricated main column 2 and the prefabricated base plate 1 outside the upper vertical main reinforcement 4 and the lower vertical main reinforcement 5. Low-yield steel bars 8 are connected between the upper short steel bars 6 and the lower short steel bars 7 through connecting pieces, and high-performance concrete is poured in the high-performance concrete pouring area 3.

[0014] The above-mentioned rapid construction prefabricated slab-column foundation can be further optimized and / or improved according to actual needs: Example 2: A boss 9 is provided on the outer side of the lower portion of the precast main column 2, and the upper portion of the upper short steel bar 6 is located inside the boss 9. The boss 9 can increase the cross-section of the precast main column 2 and the volume of the high-performance concrete pouring area 3.

[0015] Example 3: The connecting member is a double-thread sleeve 10. After hoisting into place, the upper vertical main reinforcement 4 and the lower vertical main reinforcement 5 are docked. The outer sleeve of the double-thread sleeve 10 is rotated downward into position. The lock nut of the double-thread sleeve 10 is screwed in, and the torque is checked with a torque wrench. The low-yield steel bars 8 are connected using the same double-thread sleeve 10 in the order of upper short bars 6, low-yield bars 8, and lower short bars 7. The double-thread sleeve 10 facilitates the connection of steel bars at the construction site.

[0016] Example 4: The outer side of the lower part of the prefabricated main column 2 is roughened. During the prefabrication process, the outer side of the lower part of the prefabricated main column 2 is made of a special rough template to make its surface rough, so that no separate roughening operation is required during the subsequent pouring of high-performance concrete.

[0017] Example 5: A connection construction method for quickly constructing a prefabricated slab-column foundation, first hoisting the prefabricated main column 2 into place on the top of the prefabricated base plate 1, and releasing the hoisting after precise positioning. Then, the upper vertical main reinforcement 4 and the lower vertical main reinforcement 5 are connected and fixed by connecting pieces, and then the upper short steel bars 6 and the lower short steel bars 7 are fixed to the low-yield steel bars 8 by connecting pieces. Finally, the high-performance concrete pouring area 3 is closed with a formwork, and the high-performance concrete pouring area 3 is poured with high-performance concrete.

[0018] In this way, the upper short steel bars 6 and the lower short steel bars 7 are connected by a connecting piece with a low-yield steel bar 8, which can yield before ordinary steel bars under the action of seismic loads, thereby achieving the purpose of energy consumption; 2. The high-performance concrete pouring area 3 is poured with high-performance concrete. High-performance concrete has high tensile strength and can exert a certain bearing capacity under the action of earthquakes without rapid cracking and damage; 3. The high-performance concrete pouring area 3 is poured with high-performance concrete. Due to its dense structure, high-performance concrete has high durability and can protect the internal structure from corrosion.

[0019] The above technical features respectively constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A fast construction prefabricated slab column foundation, characterized in that It includes a precast base plate and a precast main column. The precast main column is T-shaped with a larger upper part and a smaller lower part. The precast main column is located on the top of the precast base plate. A high-performance concrete pouring area is formed between the lower part of the precast main column and the precast base plate. Upper vertical main bars and lower vertical main bars with outer ends located in the high-performance concrete pouring area are provided above and below the precast main column and the precast base plate respectively. The upper vertical main bars and the lower vertical main bars are connected together by connecting pieces. Upper short steel bars and lower short steel bars are provided above and below the precast main column and the precast base plate outside the upper vertical main bars and the lower vertical main bars respectively. Low-yield steel bars are connected between the upper short steel bars and the lower short steel bars by connecting pieces. High-performance concrete is poured in the high-performance concrete pouring area.

2. The rapid construction prefabricated slab column foundation according to claim 1 is characterized in that A boss is provided on the outer side of the lower part of the prefabricated main column, and the upper part of the upper short steel bar is located inside the boss.

3. The rapid construction prefabricated slab column foundation according to claim 1 or 2, characterized in that The connecting piece is a double-thread sleeve.

4. The rapid construction prefabricated slab column foundation according to claim 1 or 2, characterized in that The outer surface of the lower part of the prefabricated main column is rough.

5. The rapid construction prefabricated slab column foundation according to claim 3 is characterized in that The outer surface of the lower part of the prefabricated main column is rough.

6. A method for quickly constructing a prefabricated slab-column foundation connection structure, characterized in that First, the prefabricated main column is hoisted into place on the top of the prefabricated base plate. After precise positioning, the hoisting is released. Then, the upper vertical main reinforcement and the lower vertical main reinforcement are connected and fixed through connectors. Then, the upper short steel bars and the lower short steel bars are fixed to the low-yield steel bars through connectors. Finally, the high-performance concrete pouring area is closed with a formwork, and high-performance concrete is used to pour the high-performance concrete pouring area.

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