A construction method for reverse new column connection structure based on self-locking anchoring technology

Abstract

The present invention discloses a construction method for reverse new column connection structure based on self-locking anchoring technology. When a new reinforced concrete frame structure is built, all frame columns are prefabricated in sections, the installed prefabricated columns are synchronously extended and jacked up, and the floor part is constructed at the bottom to achieve reverse construction of the new building on the ground. During the extension process, the bottom and top steel plates of adjacent prefabricated columns are welded, the annular gap of the reserved groove at the top of the column is grouted, and the reserved holes of the connecting sleeve are grouted in advance. When the prefabricated columns are docked, the self-locking anchor rods are opened in the inner cavity of the connecting sleeve to achieve structural docking. This construction method can realize the construction of all floor structures of the building within a height range of 2 meters at the bottom, and can eliminate construction protection measures such as setting up scaffolding and climbing formwork, and can avoid high-altitude operations, reducing the time occupied by funds and resources. This new construction method has broad application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and particularly relates to a construction method for reversely constructing a new column connection structure based on a self-locking anchoring technology. Background Art

[0002] The construction industry is a pillar of the national economy. In recent years, it has provided strong support for the sustained and healthy development of my country's economy. However, the construction industry's production methods have remained relatively extensive, far from meeting the requirements of high-quality development. To promote the industrialization, digitalization, and intelligent upgrading of the construction industry, accelerate the transformation of construction methods, and promote high-quality development of the construction industry, the Ministry of Housing and Urban-Rural Development, together with 12 other ministries and commissions, issued national documents such as the "Guiding Opinions on Promoting the Coordinated Development of Intelligent Construction and Building Industrialization," marking the beginning of a major transformation in intelligent construction in the construction industry. Currently, traditional building construction is a single-story, bottom-up, floor-by-floor construction model. This requires the use of protective measures such as climbing formwork and scaffolding during construction. These measures are not only time-consuming and expensive to rent, but also cumbersome to set up and dismantle. Therefore, a construction method has been developed that involves underground construction and jacking up, eliminating the need for setting up and dismantling climbing formwork and scaffolding. This novel above-ground reverse construction method is expected to have broad prospects for future application. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-efficiency construction method for casting floor beam and slab structures about two meters above the ground, which can avoid the need for scaffolding or the use of climbing frames, in response to the long construction period, high working surface and auxiliary measures such as the setting up of climbing frames or scaffolding in the existing single-layer reinforced concrete frame structure construction technology from bottom to top.

[0004] To achieve the above objectives, the technical solution of the present invention is: a reverse new column connection structure and construction method based on self-locking anchoring technology, characterized by comprising the following steps:

[0005] Step 1: First, divide the precast concrete column into the first section precast column, the middle section precast column and the lower section precast column (see Figure 1 );

[0006] Step 2: Tighten the threaded end of the self-locking anchor rod and the threaded end of the connecting sleeve (see Figure 2 );

[0007] Step 3: Support the formwork, tie the steel cage, and construct the pre-buried self-locking anchor rod connection sleeve according to the relevant nodes in advance and firmly position it with the steel cage (see Figure 3 );

[0008] Step 4: Casting precast columns;

[0009] Step 5: Lift the top floor and the prefabricated columns of the first section of the top floor. After the lifting reaches a certain height, install the prefabricated columns of the middle section of the top floor in the steel slideway (see Figure 4 );

[0010] Step 6: After the top middle section prefabricated column and the top first section prefabricated column form a whole, continue to lift upwards. After the lifting reaches a certain height, install the top lower section prefabricated column (see Figure 5 );

[0011] Step 7: After the top floor is built, continue to lift and pour the floor structure of the next floor, and install the first section of prefabricated columns of the next floor (see Figure 6 );

[0012] Step 8: Repeat the process several times to cast the top floor down to 2 floors, 3 floors, 4 floors, etc. until the 2nd floor is cast;

[0013] Step 9: After all floors are poured and reach the designed elevation, install the bottom section columns of the ground floor, weld them to the embedded bottom plate in the foundation, and cover them with 500 high concrete column footings;

[0014] Step 10: Remove the steel slide and pour concrete between the floor slab and precast columns.

[0015] In the steps five and six, the middle section prefabricated column is connected to the first section prefabricated column and the lower section prefabricated column by self-locking anchor rods. Before installation, inorganic grouting material needs to be injected into the reserved holes in advance. At the same time, inorganic grouting material also needs to be poured into the grooves of the middle section and the lower section prefabricated columns in advance. After the prefabricated columns are installed and fixed, the inorganic grouting material solidifies to form a solid whole of each prefabricated column section.

[0016] The invention relates to a construction method for reversely constructing a new column connection structure based on a self-locking anchoring technology, which has the following beneficial effects:

[0017] The present invention discloses a construction method for reversely constructing new column connections based on self-locking anchoring technology. By lifting a portion of an already constructed reinforced concrete frame structure upward, construction can be performed at a low point on the ground, eliminating the need for scaffolding or climbing frames, thereby achieving the goal of reverse construction of new structures above ground. This construction method eliminates the need for scaffolding or climbing frames, reduces overhead work, and saves time, capital, and resources. This method aligns with the development trend of intelligent construction and is expected to be widely adopted in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the first section prefabricated column, the middle section prefabricated column and the lower section prefabricated column disclosed in the present invention;

[0020] Figure 2 This is a schematic diagram of the self-locking anchor rod and the connecting sleeve after being tightened;

[0021] Figure 3 This is a schematic diagram of the first section prefabricated column, the middle section prefabricated column and the lower section prefabricated column disclosed in the present invention before casting;

[0022] Figure 4 This is a schematic diagram of the state of the top-level middle section prefabricated column after installation disclosed by the present invention;

[0023] Figure 5 This is a schematic diagram of the prefabricated column in the lower section of the top floor after installation disclosed by the present invention;

[0024] Figure 6 This is a schematic diagram of the state of the next layer after pouring the top layer disclosed in the present invention;

[0025] Figure 7 This is a schematic diagram of the state of the building after construction is completed disclosed by the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings.

[0028] Step 1: First, determine the top floor beams 7 and slabs 8 that need to be cast first according to the structural construction drawings, and split all concrete frame columns into three sections of precast concrete columns, namely the first section precast columns (6 and 16), the middle section precast columns 12 and the lower section precast columns 14 (see Figure 1 );

[0029] Step 2: Tighten the threaded end of the self-locking anchor rod and the threaded end of the connecting sleeve (see Figure 2 );

[0030] Step 3: Support the formwork, tie the steel cage, and construct the pre-buried self-locking anchor rod connection sleeve according to the relevant nodes in advance and firmly position it with the steel cage (see Figure 3 );

[0031] Step 4: Casting precast columns;

[0032] Step 5: Cast reinforced concrete column foundation 1, install steel slide 4 and steel bracket 5, and then install the first section of prefabricated column 6 of the 4th floor in place (see Figure 4 );

[0033] Step 6: Support the formwork and cast the top beam 7 and slab 8. After the concrete solidifies, the top beam 7 is connected to the top first column 6 to form a whole, and the top slab 8 is disconnected from the top first column (see Figure 4 );

[0034] Step 7. After the jack 9 is in place, the whole formed by the installed plate 8, beam 7 and column 6 on the top floor is lifted. After the whole is lifted to a certain height, the top middle section prefabricated column 12 is moved to the steel slide 4, and the lower convex column head of the top first section prefabricated column 6 is dropped into the groove of the middle section prefabricated column. At the same time, the anchor rod end of the first section prefabricated column is aligned with the reserved hole of the middle section prefabricated column. The first section prefabricated column and the middle section prefabricated column are connected by self-locking anchor rods. Before installation, inorganic grouting material needs to be injected into the reserved hole in advance; at the same time, inorganic grouting material also needs to be poured into the groove of the middle section prefabricated column in advance. When the prefabricated column is installed and fixed, the inorganic grouting material solidifies to form a solid whole of each prefabricated column section. (See Figure 5 );

[0035] Step 8: After the strength of the grouting material reaches the lifting requirement, continue to lift upward. After the lifting reaches a certain height, move the top lower section prefabricated column 14 into the steel slide 4, and drop the lower convex column head 13 of the top middle section prefabricated column 12 into the upper groove of the lower section prefabricated column 14. At the same time, the anchor rod end of the middle section prefabricated column is aligned with the reserved hole of the lower section prefabricated column. The middle section prefabricated column and the lower section prefabricated column are connected by self-locking anchor rods. Before installation, inorganic grouting material must be injected into the reserved hole in advance; at the same time, inorganic grouting material must also be poured into the groove of the lower section prefabricated column in advance. When the prefabricated column is installed and fixed, the inorganic grouting material solidifies to form a solid whole of each prefabricated column section. (See Figure 6 );

[0036] Step 8: Repeat the process of pouring 2, 3, 4 layers below the top floor, etc. until the 2nd floor is completed; (See Figure 7 );

[0037] Step 9: After all floors are poured and reach the designed elevation, install the bottom section columns of the ground floor;

[0038] Step 10: Remove the steel slide and pour concrete between the floor slab and precast columns.

[0039] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A construction method for reverse new column connection structure based on self-locking anchoring technology, characterized in that: The method comprises the following steps: Step 1: First, divide the precast concrete column into the first section precast column, the middle section precast column and the lower section precast column; Step 2: Tighten the threaded end of the self-locking anchor rod and the threaded end of the connecting sleeve; Step 3: Support the formwork, tie the steel cage, and pre-embed the self-locking anchor rod connection sleeve according to the relevant nodes in advance and firmly position it with the steel cage; Step 4: Casting precast columns; Step 5: Lift the top floor and the prefabricated columns of the first section of the top floor. After the lifting reaches a certain height, install the prefabricated columns of the middle section of the top floor in the steel slideway. Step 6: After the top middle section prefabricated column and the top first section prefabricated column form a whole, continue to lift upwards. After the lifting reaches a certain height, install the top lower section prefabricated column; Step 7: After the whole structure is formed and the top floor is built, continue to lift and pour the floor structure of the next floor, and install the first section of prefabricated columns of the next floor; Step 8: Repeat the process several times to cast the top floor down to 2 floors, 3 floors, 4 floors, etc. until the 2nd floor is cast; Step 9: After all floors are poured and reach the designed elevation, install the bottom section columns of the ground floor, weld them to the embedded bottom plate in the foundation, and cover them with 500 high concrete column footings; Step 10: Remove the steel slide and pour concrete between the floor slab and precast columns.

2. A construction method for reversely constructing a new column connection structure based on self-locking anchoring technology according to claim 1, characterized in that: By extending the prefabricated columns and lifting the steel slides, building floors can be constructed within a 2-meter height range above the ground, realizing reverse construction of new buildings on the ground, eliminating the need for construction protection measures such as setting up scaffolding or climbing frames, and eliminating the need for high-altitude operations.

3. The construction method of reverse new column connection structure based on self-locking anchoring technology according to claim 1, characterized in that: The middle section prefabricated column is connected to the first section prefabricated column and the lower section prefabricated column by self-locking anchor rods. Inorganic grouting material is injected into the reserved holes in advance before installation. At the same time, inorganic grouting material is also required to be poured into the grooves of the middle section and the lower section prefabricated columns in advance. When the prefabricated column is installed, the self-locking anchor rod is opened in the inner cavity of the connecting sleeve, and the grouting material poured in advance is solidified to form a solid whole of each prefabricated column section. The grouting amount is small and the grouting outlet can be used to judge whether it is full.

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