Construction method for quickly positioning and installing prefabricated column structure

Abstract

The invention discloses a construction method for quickly positioning and installing a prefabricated column structure. The construction method comprises the working procedures of lower column rib positioning, prefabricated column hoisting and connecting, inclined strut installing and adjusting, joint pouring and the like. The upper reserved column ribs of the lower-layer prefabricated column are accurately positioned through the positioning template device, the mounting height and position of the positioning template device are determined, the upper reserved column ribs are effectively prevented from deviating, it is ensured that a supporting base of the upper-layer prefabricated column is rapidly aligned with the upper reserved column ribs of the lower-layer prefabricated column, and the hoisting in-place efficiency is greatly improved; and meanwhile, the positioning formwork device can be recycled, the construction cost is reduced, the precision, high efficiency and high quality of prefabricated column installation can be achieved through the construction method, and the overall level of prefabricated building column installation construction is improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a construction method for rapid positioning and installation of precast column structures. Background Technology

[0002] In precast concrete structures, the installation quality of precast columns directly affects the stability and safety of the overall structure. Traditional precast column installation often encounters the following technical problems:

[0003] 1) Existing precast columns often encounter problems during the installation of upper and lower columns, such as the longitudinal reinforcing bars being prone to bending and deformation due to insufficient overall rigidity during transportation and installation, and slow positioning and installation, which is time-consuming, labor-intensive, and delays the construction schedule.

[0004] 2) When pouring concrete at the joint, the reserved column reinforcement at the lower cast-in-place joint is prone to displacement after pouring. This makes it difficult for the bottom steel sleeve or support seat of the upper precast column to be accurately aligned with the lower steel reinforcement when it is hoisted, which seriously affects the hoisting efficiency and may even require on-site chiseling and adjustment, damaging the structure.

[0005] 3) In the process of installing supports, the traditional support method has limited adjustment accuracy, and the verticality of the precast columns is difficult to control. Summary of the Invention

[0006] In view of this, in order to solve the technical problems existing in the prior art, the present invention provides a construction method that can achieve precise positioning and rapid installation of precast column reinforcement and ensure the quality of joint pouring.

[0007] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0008] A construction method for rapid positioning and installation of precast column structures, applicable to the positioning and installation of precast columns across multiple floors, comprising the following steps:

[0009] Step S1) Positioning of lower column reinforcement: Before the construction of the top of the cast-in-place floor structure node of the lower precast column, the upper reserved column reinforcement extending from the top of the lower precast column is positioned using a positioning template device.

[0010] Step S2) Precast column hoisting and connection: Measure and lay out the column corner points and mark the lines with ink. Use the upper precast column for hoisting. When hoisting the upper precast column, hoist the upper precast column with the support base fixed below to the installation position, align the support base at the lower end of the upper precast column with the support base and put it on the upper reserved column bar of the lower precast column that has been positioned. Lower the upper precast column and tie and overlap the lower reserved column bar of the upper precast column with the upper reserved column bar of the lower precast column.

[0011] Step S3) Installation and adjustment of diagonal bracing: At least two adjustable diagonal braces are installed on the outside of the upper precast column. The adjustable diagonal braces are symmetrically distributed on the outside of the upper precast column. Nuts are pre-embedded on the outside of the upper precast column. One end of the adjustable diagonal brace is connected to the nut on the outside of the column, and the other end is fixed to the embedded part of the floor structure. The verticality of the upper precast column is corrected and fixed by adjusting the adjustable diagonal braces.

[0012] Step S4) Node pouring: Set up a formwork in the node area between the upper and lower precast columns, and pour concrete through the pouring holes on the upper precast columns.

[0013] Furthermore, each precast column includes a column body, a straight corrugated metal pipe, and at least two elbow exhaust pipes. The straight corrugated metal pipe is embedded in the column body and extends along its length to form a channel for pouring concrete. The opening at the top of the channel forms a pouring hole. The two elbow exhaust pipes are embedded at the lower end of the column body. Each elbow exhaust pipe has a first opening and a second opening. The first opening of the elbow exhaust pipe is embedded in the lower end face inside the column body, and the second opening of the elbow exhaust pipe is exposed on the side of the column body to form an exhaust hole.

[0014] Furthermore, the top and bottom of the column are respectively provided with an upper concave surface and a lower concave surface. The upper concave surface of the column is symmetrically provided with lifting points. The precast column is hoisted using the two lifting points at the upper concave surface of the column, and nuts are pre-embedded on each side of the column.

[0015] Further, in step S1), the positioning template device includes a lower positioning template and an upper inner limiting template. The upper inner limiting template is located above the lower positioning template. The two positioning templates, the lower positioning template and the upper inner limiting template, are used to position the upper reserved column reinforcement of the lower precast column. After the construction of the cast-in-place node is completed, the lower positioning template and the upper inner limiting template are removed.

[0016] Further, in step S2), the support base has a receiving structure for guiding and accommodating column reinforcement. When the upper precast column is lowered, the upper reserved column reinforcement of the lower precast column is inserted into and accommodated in the receiving structure of the support base at the bottom of the upper precast column.

[0017] Furthermore, the support base includes a flat steel structure and additional reinforcing bars, the additional reinforcing bars being disposed on the flat steel structure, and the receiving structure being disposed on the flat steel structure.

[0018] Furthermore, the flat steel structure is in the shape of a four-square grid. The flat steel structure includes several outer flat steels arranged along the outer periphery of the bottom of the column and connected end to end, as well as connecting flat steels that are cross-connected between the multiple outer flat steels. The additional reinforcing bars are welded to the connecting flat steels, the upper end of the additional reinforcing bars extends into the column, and the lower end of the additional reinforcing bars is flush with the end of the reserved column reinforcing bars.

[0019] Further, in step S3), one end of the adjustable diagonal brace is connected to a nut pre-embedded on the side of the column via a movable fastener, and the angle between the adjustable diagonal brace and the floor structure plane is 45~60°.

[0020] Further, in step S4), an inverted wedge-shaped vibration port is provided at the upper middle position of the template on one side of the upper and lower precast columns. Concrete is poured into the node area through the pouring hole of the straight metal corrugated pipe pre-embedded in the center of the upper precast column. At the same time, a vibrator is inserted into the inverted wedge-shaped vibration port to vibrate and compact the concrete. After the concrete has initially set, the inverted wedge-shaped vibration port is sealed.

[0021] Furthermore, the top surface of the inverted wedge-shaped vibratory inlet is 50-100mm lower than the concave surface at the lower end of the column.

[0022] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects:

[0023] The construction method of this invention includes processes such as positioning the lower column reinforcement, hoisting and connecting the precast columns, installing and adjusting the diagonal braces, and pouring the joints. By using a positioning template device to accurately position the upper reserved column reinforcement of the lower precast columns, the installation height and position of the positioning template device are clearly defined, effectively preventing the upper reserved column reinforcement from shifting. This ensures that the support base of the upper precast column and the upper reserved column reinforcement of the lower precast column are quickly aligned, significantly improving the hoisting and positioning efficiency. At the same time, the positioning template device can be reused, reducing construction costs. The construction method provided by this invention can achieve precise, efficient, and high-quality installation of precast columns, improving the overall level of column installation construction in prefabricated buildings.

[0024] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, the following detailed description is provided in conjunction with preferred embodiments and accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a flowchart of the construction method of the present invention;

[0026] Figure 2 This is a detailed schematic diagram of the cast-in-place joint between the upper and lower precast columns of the present invention. Figure 3 This is a schematic diagram showing the relationship between the precast columns and the floor structure layers of the present invention;

[0027] Figure 4 This is a left view of the upper precast column of the present invention;

[0028] Figure 5This is a front view of the upper precast column of the present invention;

[0029] Figure 6 This is a structural diagram of the lower precast column of the present invention;

[0030] Figure 7 This is a detailed drawing of the support base of the present invention;

[0031] Figure 8 This is a schematic diagram showing the relationship between the upper inner limiting template and the upper reserved column reinforcement of the present invention;

[0032] Figure 9 This is a schematic diagram showing the relationship between the lower positioning template and the upper reserved column reinforcement of the present invention.

[0033] In the diagram: 1. Precast column, 1a. Upper precast column, 1b. Lower precast column, 11. Column body, 111. Upper concave surface, 112. Straight corrugated metal pipe, 12. Pouring hole, 121. Elbow vent pipe, 13. Lifting point, 14. Inverted wedge vibrating port, 15. Upper reserved column reinforcement, 2. Support base, 3. Flat steel structure, 31. Outer flat steel, 311. Connecting flat steel, 312. Additional reinforcing bar, 32. Nut, 4. Lower reserved column reinforcement, 5. Floor structure, 6. Positioning template device, 7. Upper inner limiting template, 71. Lower positioning template, 72. Adjustable diagonal brace, 8. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings, which form part of this specification. The principles of the invention are illustrated by means of embodiments, and other aspects, features, and advantages of the invention will become apparent from this detailed description. In the accompanying drawings, the same or similar parts in different figures are indicated by the same reference numerals.

[0035] like Figures 1-6 As shown, Embodiment 1 of the present invention provides a construction method for rapid positioning and installation of precast column 1 structures. The specific implementation project of the construction method of the present invention is the Shihou Supply Chain Innovation Industrial Park in Baiyun District, Guangzhou. The project consists of three buildings, of which Building A has floors 2 to 15 as prefabricated buildings (precast column 1, precast shear wall, precast interior partition wall), with a floor height of 3.75~4.5m. The dimensions of the precast column 1 are 0.6m*0.6m and 0.8m*0.8m. The construction method of the present invention is used to rapidly install and position the precast column 1 on several floors of the project. The construction method includes the following steps:

[0036] Step S1) Positioning of lower column reinforcement: Before the construction of the cast-in-place floor structure 6 node at the top of the lower precast column 11b, the upper reserved column reinforcement 2 extending from the top of the lower precast column 11b is positioned using the positioning template device 7.

[0037] Step S2) Precast column 1 hoisting and connection: Measure and lay out the column corner points and mark the lines with ink. Use the upper precast column 11a for hoisting. When hoisting the upper precast column 11a, hoist the upper precast column 11a with the support base 3 fixed below to the installation position, and align the support base 3 at the lower end of the upper precast column 11a with the upper reserved column reinforcement 2 of the lower precast column 1 that has been positioned. Lower the upper precast column 11a and tie and overlap the lower reserved column reinforcement 5 of the upper precast column 11a with the upper reserved column reinforcement 2 of the lower precast column 11b.

[0038] Step S3) Installation and adjustment of diagonal braces: At least two adjustable diagonal braces 8 are provided on the outside of the upper precast column 11a. The adjustable diagonal braces 8 are symmetrically distributed on the outside of the upper precast column 11a. Nuts 4 are pre-embedded on the outside of the column body 11 of the upper precast column 11a. One end of the adjustable diagonal brace 8 is connected to the nut 4 on the outside of the column body 11, and the other end is fixed to the embedded part of the floor structure 6. The verticality of the upper precast column 11a is corrected and fixed by adjusting the adjustable diagonal braces 8.

[0039] Step S4) Node pouring: Set up a formwork in the node area between the upper precast column 11a and the lower precast column 11b, and pour concrete through the pouring hole on the upper precast column 11a.

[0040] The top and bottom of the column 11 are respectively provided with an upper concave surface 111 and a lower concave surface 112. The upper concave surface 111 of the column 11 is symmetrically provided with lifting points 14. The precast column 1 is hoisted by using the two lifting points 14 at the upper concave surface 111 of the column 11. Nuts 4 are pre-embedded on each side of the column 11.

[0041] The nut 4 is preferably an M20 nut 4. At least two sets of nuts 4 are pre-embedded on each side of the column 11. The lifting point 14 is made of φ20 steel bars. The present invention designs the upper end concave surface 111 and the lower end concave surface 112 at the upper and lower ends of the column 11. The concave depth of the upper end concave surface 111 and the lower end concave surface 112 is 80mm. The lifting point 14 is symmetrically set at the upper end concave surface 111. This design facilitates the embedding and hoisting of the lifting point 14, provides operating space for concrete pouring, and enhances the bonding strength of the concrete in the joint area.

[0042] In this embodiment of the invention, each precast column 1 includes a column body 11, a straight corrugated metal pipe 12, and at least two elbow exhaust pipes 13. The straight corrugated metal pipe 12 is embedded in the column body 11 and extends along its length to form a channel for pouring concrete. The opening at the top of the channel forms a pouring hole. The two elbow exhaust pipes 13 are embedded at the lower end of the column body 11. The support base 3 is welded and fixed to the end of the lower reserved column reinforcement 5. Each elbow exhaust pipe 13 has a first opening and a second opening. The first opening of the elbow exhaust pipe 13 is embedded in the lower end face inside the column body 11, and the second opening of the elbow exhaust pipe 13 is exposed on the side of the column body 11 to form an exhaust hole. In this embodiment of the invention, a straight corrugated metal pipe 12 of DE150*100 is pre-embedded at the center along the axis of the column 11 as a pouring channel. Its opening is located at the center of the concave surface 111 at the upper end of the column 11. At the corner of the lower end face of the column 11, two 90° bent exhaust pipes 13 are pre-embedded. The two bent exhaust pipes 13 are symmetrically arranged about the central axis of the column 11. In the concave surface 111 at the upper end of the column 11, two φ20 steel bars bent into lifting points 14 are symmetrically pre-embedded. On the four sides of the column 11, according to the size of the column cross-section, various lifting points are pre-embedded. There are 2-3 M20 nuts 4 for connecting the adjustable diagonal brace 8 and the straight metal corrugated pipe 12. The preferred model is DE150*100 metal corrugated pipe. The straight metal corrugated pipe 12 is embedded in the middle of the column 11 along the length direction of the column 11. The upper opening is located in the middle of the upper concave surface 111 of the column 11, serving as a concrete pouring channel. The preferred model is D50 bent metal corrugated pipe. There are two bent metal corrugated pipes, which extend from the lower end face of the column 11 to the side face of the column 11, serving as vent holes during concrete pouring to avoid hollow defects caused by poor venting in the joint area.

[0043] In step S1), the positioning template device 7 includes a lower positioning template 72 and an upper inner limiting template 71. The upper inner limiting template 71 is located above the lower positioning template 72. The two positioning templates, the lower positioning template 72 and the upper inner limiting template 71, are used to position the upper reserved column reinforcement 2 of the lower precast column 11b. Based on the column position measurement and layout results, the upper reserved column reinforcement 2 of the lower precast column 11b is adjusted. The lower positioning template 72 is used to frame the upper reserved column reinforcement 2 of the column. At this time, all the upper reserved column reinforcement 2 is within the plane range of the lower positioning template 72. The upper reserved column reinforcement 2 is adjusted according to the measurement and layout results, and then the upper inner limiting template 71 is installed. At this time, all the upper reserved column reinforcement 2 is within the range of the upper inner limiting template 71. After the cast-in-place node construction is completed, the lower positioning template 72 and the upper inner limiting template 71 are removed. In this embodiment, the lower positioning template 72 is located 100mm above the top surface of the floor structure 6, and the upper inner limiting template 71 is located 300mm above the lower positioning template 72.

[0044] In step S2), the support base 3 has a receiving structure for guiding and accommodating the column reinforcement. When the upper precast column 11a is lowered, the upper reserved column reinforcement 2 of the lower precast column 11b is inserted into and accommodated in the receiving structure of the support base 3 at the bottom of the upper precast column 11a. This achieves rapid alignment between the support base 3 of the upper precast column 11a and the upper reserved column reinforcement 2 of the lower precast column 11b. Fixing the support base 3 structure at the bottom of the precast column 1 not only provides a stable temporary support platform for the upper column, but its additional reinforcing bars 32 and flat steel mesh can also effectively transfer vertical loads and form a reliable connection with the post-poured concrete, resulting in strong overall joint integrity.

[0045] The support base 3 of the present invention includes a flat steel structure 31 and additional reinforcing bars 32. The additional reinforcing bars 32 are disposed on the flat steel structure 31, and the receiving structure is disposed on the flat steel structure 31. The support base 3 is welded to the upper reserved column reinforcement 2 through the flat steel structure 31, and the connection strength is enhanced by the additional reinforcing bars 32, which significantly improves the shear and compressive resistance of the node area, ensures the integrity of the upper precast column 11a and the lower precast column 11b structure, and avoids the risk of node failure.

[0046] The flat steel structure 31 of this invention is in the shape of a four-grid. The flat steel structure 31 includes several outer flat steel bars 311 arranged along the outer periphery of the bottom of the column 11 and connected end-to-end, and connecting flat steel bars 312 that are cross-connected between the outer flat steel bars 311. Additional reinforcing bars 32 are welded to the connecting flat steel bars 312. The upper end of the additional reinforcing bars 32 extends into the column 11, and the lower end of the additional reinforcing bars 32 is flush with the end of the reserved column reinforcement. The additional reinforcing bars 32 are made of C25 grade steel bars. The supporting base 3 includes the four-grid flat steel structure 31 and the additional reinforcing bars 32. In practice, firstly, a ring of outer flat steel 311 (50mm wide) is welded around the outer side of the lower end of the reserved column reinforcement 5. Then, two perpendicular connecting flat steels 312 are welded along the midpoints of the two opposite sides of the outer flat steel 311 to form a stable "four-grid" structure. At the 1 / 4 length position on both sides of each connecting flat steel 312, an additional C25 reinforcing bar 32 is welded. This support base 3 is the direct support component when the upper precast column 11a is hoisted. The upper end of the additional reinforcing bar 32 is anchored into the concrete of the column 11, and the lower end of the additional reinforcing bar 32 is flush with the end of the lower reserved column reinforcement 5, which further enhances the connection strength between the support base 3 and the column 11 and the lower reserved column reinforcement 5, and strengthens the shear resistance of the joint.

[0047] In step S3), one end of the adjustable diagonal brace 8 is connected to the nut 4 pre-embedded on the side of the column 11 via a movable fastener. The angle between the adjustable diagonal brace 8 and the floor structure 6 plane is 45~60°. The movable fastener and nut 4 fit tightly, allowing for flexible adjustment of the angle of the adjustable diagonal brace 8. The embedded part is made of steel plate and is pre-welded and fixed to the floor slab reinforcement. By adjusting the length of the adjustable diagonal brace 8, the angle between the adjustable diagonal brace 8 and the floor slab is controlled within 45~60°. This angle range ensures both the diagonal brace's resistance to lateral displacement and effective transmission of vertical loads. After adjustment, a spirit level and total station are used to check the verticality of the column 11, ensuring that the verticality deviation meets the specifications (not exceeding 5mm / floor). After passing the inspection, the movable fastener of the diagonal brace is tightened.

[0048] In step S4), an inverted wedge-shaped vibration port 15 is provided at the upper middle position of one side formwork of the lower precast column 11b. Concrete is poured into the node area through the pouring hole of the straight metal corrugated pipe 12 pre-embedded in the center of the upper precast column 11a. At the same time, a vibrator is inserted into the inverted wedge-shaped vibration port 15 for compaction. After the concrete has initially set, the inverted wedge-shaped vibration port 15 is sealed. By setting an inverted wedge-shaped vibration port 15 slightly higher than the concave surface on the side formwork of the precast column 1, the construction quality of concrete at the node is ensured. This invention uses metal corrugated pipes as pouring channels and venting holes respectively. Combined with the design of the inverted wedge-shaped vibration port 15, it realizes layered pouring of concrete, full vibration and smooth venting, effectively solving quality defects such as hollowness and honeycomb in the node area and improving the density of concrete.

[0049] The top surface of the inverted wedge-shaped vibratory inlet 15 is 50-100mm higher than the bottom surface of the concave surface 112 at the lower end of the column 11. In this embodiment of the invention, the upper opening width of the inverted wedge-shaped vibratory inlet 15 is 150-200mm, the lower opening width is 50-80mm, and the depth is 200-300mm. The top surface of the vibratory inlet is 50-100mm higher than the concave surface at the lower end of the column 11, which facilitates the vibratory rod to be inserted into the node area for sufficient vibration. After the concrete vibration is completed, a template slightly larger than the size of the inverted wedge-shaped vibratory inlet 15 is inserted and fixed from top to bottom to complete the sealing.

[0050] Compared with the prior art, the technical solution disclosed in the above embodiments has the following beneficial effects:

[0051] In the above embodiments, the present invention uses a positioning template device 7 to accurately position the upper reserved column reinforcement 2 of the lower precast column 11b, clearly defining the installation height and position of the positioning template device 7, effectively preventing the upper reserved column reinforcement 2 from shifting, ensuring that the support base 3 of the upper precast column 11a and the upper reserved column reinforcement 2 of the lower precast column 11b are quickly aligned, greatly improving the hoisting and positioning efficiency. At the same time, the positioning template device 7 can be reused, reducing construction costs and conforming to the concept of green construction. The adjustable diagonal brace 8 cooperates with the nut 4 pre-embedded on the outside of the column 11 to adjust the verticality of the precast column 1. At the same time, the symmetrically distributed adjustable diagonal brace 8 ensures the stability of the temporary fixation of the column 11, avoiding the column 11 from shifting during construction. The construction method of the present invention has close connection between each step, is easy to operate, and is applicable to the installation of various precast column 1 structure buildings. It is conducive to large-scale promotion and application, and improves the construction quality and efficiency of prefabricated buildings.

[0052] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A construction method for rapid positioning and installation of precast column structures, characterized in that: This includes a construction method for positioning and installing precast columns between several floors, the construction method comprising the following steps: Step S1) Positioning of lower column reinforcement: Before the construction of the top of the cast-in-place floor structure node of the lower precast column, the upper reserved column reinforcement extending from the top of the lower precast column is positioned using a positioning template device. Step S2) Precast column hoisting and connection: Measure and lay out the column corner points and mark the lines with ink. Use the upper precast column for hoisting. When hoisting the upper precast column, hoist the upper precast column with the support base fixed below to the installation position, align the support base at the lower end of the upper precast column with the support base and put it on the upper reserved column bar of the lower precast column that has been positioned. Lower the upper precast column and tie and overlap the lower reserved column bar of the upper precast column with the upper reserved column bar of the lower precast column. Step S3) Installation and adjustment of diagonal bracing: At least two adjustable diagonal braces are installed on the outside of the upper precast column. The adjustable diagonal braces are symmetrically distributed on the outside of the upper precast column. Nuts are pre-embedded on the outside of the upper precast column. One end of the adjustable diagonal brace is connected to the nut on the outside of the column, and the other end is fixed to the embedded part of the floor structure. The verticality of the upper precast column is corrected and fixed by adjusting the adjustable diagonal braces. Step S4) Node pouring: Set up a formwork in the node area between the upper and lower precast columns, and pour concrete through the pouring holes on the upper precast columns.

2. The construction method for rapid positioning and installation of precast column structures according to claim 1, characterized in that: Each precast column includes a column body, a straight corrugated metal pipe, and at least two elbow exhaust pipes. The straight corrugated metal pipe is embedded in the column body and extends along its length to form a channel for pouring concrete. The opening at the top of the channel forms a pouring hole. The two elbow exhaust pipes are embedded at the lower end of the column body. Each elbow exhaust pipe has a first opening and a second opening. The first opening of the elbow exhaust pipe is embedded in the lower end face inside the column body, and the second opening of the elbow exhaust pipe is exposed on the side of the column body to form an exhaust hole.

3. The construction method for rapid positioning and installation of precast column structures according to claim 2, characterized in that: The top and bottom of the column are respectively provided with an upper concave surface and a lower concave surface. The upper concave surface of the column is symmetrically provided with lifting points. The precast column is hoisted using the two lifting points at the upper concave surface of the column. Nuts are pre-embedded on each side of the column.

4. The construction method for rapid positioning and installation of precast column structures according to claim 1, characterized in that: In step S1), the positioning template device includes a lower positioning template and an upper inner limiting template. The upper inner limiting template is located above the lower positioning template. The two positioning templates, the lower positioning template and the upper inner limiting template, are used to position the upper reserved column reinforcement of the lower precast column. After the cast-in-place node construction is completed, the lower positioning template and the upper inner limiting template are removed.

5. The construction method for rapid positioning and installation of precast column structures according to claim 1, characterized in that: In step S2), the support base has a receiving structure for guiding and accommodating column reinforcement. When the upper precast column is lowered, the upper reserved column reinforcement of the lower precast column is inserted into and accommodated in the receiving structure of the support base at the bottom of the upper precast column.

6. The construction method for rapid positioning and installation of precast column structures according to claim 5, characterized in that: The support base includes a flat steel structure and additional reinforcing bars, the additional reinforcing bars being disposed on the flat steel structure, and the receiving structure being disposed on the flat steel structure.

7. The construction method for rapid positioning and installation of precast column structures according to claim 6, characterized in that: The flat steel structure is in the shape of a four-square grid. The flat steel structure includes several outer flat steels arranged along the outer perimeter of the bottom of the column and connected end to end, as well as connecting flat steels that are cross-connected between the multiple outer flat steels. The additional insert is welded to the connecting flat steel, the upper end of the additional insert extends into the column, and the lower end of the additional insert is flush with the end of the reserved column reinforcement.

8. The construction method for rapid positioning and installation of precast column structures according to claim 1, characterized in that: In step S3), one end of the adjustable diagonal brace is connected to the nut pre-embedded on the side of the column through a movable fastener, and the angle between the adjustable diagonal brace and the floor structure plane is 45~60°.

9. The construction method for rapid positioning and installation of precast column structures according to claim 1, characterized in that: In step S4), an inverted wedge-shaped vibration port is provided at the upper middle position of the formwork on one side of the upper and lower precast columns. Concrete is poured into the node area through the pouring hole of the straight metal corrugated pipe pre-embedded in the center of the upper precast column. At the same time, a vibrator is inserted into the inverted wedge-shaped vibration port to vibrate and compact the concrete. After the concrete has initially set, the inverted wedge-shaped vibration port is sealed.

10. The construction method for rapid positioning and installation of precast column structures according to claim 9, characterized in that: The top surface of the inverted wedge-shaped vibratory inlet is 50-100mm lower than the concave surface at the bottom of the column.

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