Construction method for efficiently installing prefabricated column

Abstract

The invention provides a construction method for efficient installation of a prefabricated column. The construction method comprises the following steps that S1, environment cleaning is conducted on a to-be-installed floor butt joint base; s2, a second vertical rib on the floor butt joint base is detected and synchronously corrected through a correcting frame; s3, the prefabricated columns are connected through lifting equipment and bearing ropes; s4, the prefabricated column is lifted to the air, and primary installation of the positioning sleeve is completed at the bottom of the prefabricated column; s5, an inserting rod is installed in the middle of the floor slab butt joint base and locked, and meanwhile the floor slab butt joint base continues to be lifted to the operation point and is suspended above the floor slab butt joint base; s6, the lower portions of the positioning sleeves are aligned with the corresponding second vertical ribs and then gradually lowered; s7, the positioning sleeve is screwed into the prefabricated column; s8, the whole prefabricated column continues to be put down till the bottom of the prefabricated column is placed at the designed position above the floor butt joint base; s9, connection is conducted through a centralizing pull rod and a pre-embedded thread sleeve; and S10, repeating the steps S1 to S9. The device is ingenious in design, the alignment precision and the construction efficiency of the prefabricated column are greatly improved, and the construction quality is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology, and in particular to a construction method for the efficient installation of precast columns. Background Technology

[0002] Precast column-cast-in-place beam structural systems are widely used in prefabricated building construction due to their flexible construction advantages. They are primarily prefabricated in the factory, transported to the construction site, and then installed using hoisting. However, because longitudinal reinforcement needs to bear the vertical load after hoisting, all connections must be completed before the hooks can be released. Furthermore, traditional installation methods are inconvenient for alignment, making it difficult to guarantee alignment accuracy, resulting in low installation efficiency. This leads to hoisting equipment being occupied for extended periods by a single precast column, thus affecting the overall construction schedule.

[0003] Chinese patent document CN 111809728 A describes a precast assembled concrete frame structure and its construction method. The structure is relatively complex and still requires a long time to occupy hoisting equipment. Chinese patent document CN 118007873 A describes an assembled reinforced concrete precast column connection structure and its construction method. Similarly, the structure is relatively complex and cannot be quickly and accurately aligned, making operation inconvenient and its use defective. Summary of the Invention

[0004] This invention provides a construction method for efficient installation of precast columns, solving the technical problems of poor installation accuracy and cumbersome operation of precast columns.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a construction method for efficient installation of precast columns, comprising the following steps: S1. Clean the environment at the floor slab docking point to be installed; S2. Use a straightening frame to inspect and simultaneously straighten the second vertical ribs on the floor slab joint until they are all in a vertical state; S3. Use lifting equipment and load-bearing ropes to connect to the hooks set on the top of the precast column; S4. Lift the column into the air while maintaining a distance from the ground, and complete the initial installation of multiple positioning sleeves in different enlarged holes at the bottom of the precast column; S5. Install and lock the insertion rod in the middle of the floor slab docking seat, and continue to lift to the work point, hovering above the floor slab docking seat; S6. Align the lower part of the positioning sleeve with the corresponding second vertical rib and gradually lower it until the second vertical rib extends into the positioning sleeve. S7. Use a wrench to screw the positioning sleeve into the precast column until the first external thread is completely disengaged from the first internal thread, and keep the second vertical rib inside the positioning sleeve. S8. Continue to lower the precast column as a whole until the bottom of the precast column is placed above the designed position above the floor slab dock. After the precast column is fully lowered and supported, the verticality of the precast column is checked. S9. The straightening tie rod, the first right-angle plate and the alignment clamp are connected to the pre-embedded bolts in the first and second mounting holes on the upper side of the precast column, respectively. The lifting equipment is disconnected from the hook. S10. Repeat S1 to S9 until all precast columns are installed.

[0006] In the preferred embodiment, before S1, the precast column is fabricated. During the fabrication process, according to the arrangement of the first vertical rib, the plunger and the first vertical rib are used to form a connecting hole and an enlarged hole. The plunger and the embedded frame are used to form an annular groove and a straight groove. The embedded frame and the embedded cylinder are used to form a third mounting hole. At the same time, the embedded threaded sleeve is installed at the designed positions of the first and second mounting holes. A four-sided pyramidal groove and an air guide hole are set in the middle of the bottom of the precast column. The four-sided pyramidal groove and the air guide hole are connected. At the same time, a grouting hole and a grout outlet hole are set.

[0007] In the preferred embodiment, in S2, the structure of the straightening frame includes two parallel push plates connected by a top rod, with multiple third through holes through each push plate. By aligning the third through holes on the two push plates with multiple second vertical ribs on the bearing plate, the second vertical ribs are gradually inserted, and the state of the second vertical ribs at different positions is corrected as needed. In S5, the insertion rod is aligned with the first threaded hole located in the middle of the floor slab docking seat and screwed in. The insertion rod has the following structure: a threaded head and a limiting plate at the lower part of the insertion rod, multiple vertical grooves along the circumference at the upper part of the insertion rod, the length of which is greater than the depth of the pre-embedded cylinder, and a fifth chamfer at the top of the insertion rod. The screwing depth of the threaded head is limited by the limiting plate, while ensuring the perpendicularity of the insertion rod relative to the floor slab docking seat. The sealing head at the top of the pre-embedded cylinder, in conjunction with the vertical grooves, forms a grouting space.

[0008] In the preferred embodiment, during the fabrication of the precast column, the stop sleeve is first installed into the connecting sleeve of the embedded frame, and then the position of the stop sleeve is adjusted until the bottom of the stop sleeve abuts against the end of the locking hole. Then, the small end of the plunger is screwed into the connecting sleeve through the third external thread until the countersunk hole is fitted on the outside of the first vertical bar. After the embedded frame is tied and fixed in place, the formwork is sealed and the concrete is poured.

[0009] In the preferred embodiment, the precast column is placed in the storage yard, and then lifted using hoisting equipment via a hook set on the top of the precast column. After suspending, the plunger is removed and the positioning sleeve is fixed in the connecting sleeve. The lifting continues to transfer the precast column to the upper side of the floor slab docking seat at the installation location. The positioning sleeve is then aligned with the second vertical rib and lowered. After lowering, the adapter assembly is installed in the pre-embedded screw sleeve at the upper part of the precast column. The first right angle plate and the alignment clamp are installed on the outside of the precast column via the adapter assembly, cantilever brace, fastening rod, and second nut. Then, the first right angle plate and the floor slab hook are fixed by the straightening tie rod. The plunger has the following structure: it includes a small end and a large end. The small end is provided with a third external thread, and the large end is provided with a first hexagonal head. The third external thread and the first internal thread are matched. The small end is provided with a countersunk hole, which abuts against the bottom of the first vertical rib.

[0010] In the preferred embodiment, in S4, when initially installing the positioning sleeve into the enlarged hole on the precast column, the screwing process is stopped when the feedback gradually tightens, that is, when the first locking ring gradually contacts the lower side of the spring piece; in S7, the rotational force is increased using a wrench, and the process is stopped when the first external thread completely disengages from the first internal thread, that is, when the first locking ring completely passes through the top of the spring piece; in S8, the positioning sleeve gradually approaches and contacts the top of the floor slab docking seat, and under the self-weight of the precast column, it is supported by the floor slab docking seat. Then, the second locking ring contacts and squeezes the spring piece to complete the final state fixation of the positioning sleeve, that is, the second locking ring completely penetrates the top of the spring piece. After the precast column is fully stressed, grouting and pressure maintenance are carried out through the grouting hole and grout outlet hole on the lower side of the precast column until the casting connection between the precast column and the floor slab docking seat is completed.

[0011] In the preferred embodiment, the structure of the embedded frame is as follows: multiple connecting sleeves are connected to rings by straight rods, a locking hole is provided on one side of the connecting sleeve, and a second internal thread is provided inside the locking hole; The structure of the stop sleeve is as follows: the outer side of the stop sleeve is provided with a second external thread, the second internal thread and the second external thread are engaged, the inner side of the stop sleeve is provided with a plurality of spring pieces along the circumferential direction, the spring pieces include a fixed end and a movable section, the movable section and the inner side of the stop sleeve are provided with a gap, and the lower part of the spring pieces is provided with a fourth chamfer. The positioning sleeve has the following structure: a first locking ring and a second locking ring are provided on the outer side of the positioning sleeve; a spring is used to lock the first locking ring and the second locking ring; a first external thread is provided between the first locking ring and the second locking ring; the outer diameter of the first locking ring and the second locking ring are equal to the outer diameter of the first external thread; the first external thread and the first internal thread are matched; a first chamfer and a second chamfer are provided on the upper side of the first locking ring and the second locking ring, respectively; the slope of the first chamfer is greater than that of the second chamfer; a second vertical rib is inserted inside the positioning sleeve; a notch is provided at the end of the positioning sleeve closer to the first locking ring; a third chamfer is provided at the end of the positioning sleeve closer to the second locking ring; and a clamping surface is provided between the third chamfer and the second locking ring.

[0012] In the preferred embodiment, the structure of the first right-angle plate is as follows: a first ear plate and a second ear plate are respectively provided on both sides of the first right-angle plate, and a first oblong hole is provided through the first ear plate and the first oblong hole. A straight extension plate is provided in the middle of the first right-angle plate, and one side of the straightening rod is connected to the straight extension plate. A second oblong hole and a third oblong hole are provided through the straight extension plate. The adapter assembly has the following structure: it includes a threaded post and a fixing plate. The threaded post is located inside the pre-embedded threaded sleeve. The fixing plate has a second through hole. The screw passes through the second through hole and the first oval hole. The screw is connected by a first nut, a first ear plate, and a second ear plate.

[0013] In the preferred embodiment, the structure of the straightening rod is as follows: it includes a first bidirectional threaded cylinder and a second bidirectional threaded cylinder. The first bidirectional threaded cylinder has a first threaded rod on each side, and a first hook at the end of the first threaded rod. The two first hooks are respectively hung in the floor slab hook and the third oblong hole. An adapter sleeve is sleeved on the outer side of the first threaded rod located on the upper side. The second bidirectional threaded cylinder has a second threaded rod on each side, and a second hook at the end of the second threaded rod. A straight plate is provided on the adapter sleeve, and a first through hole is provided through the straight plate. The two second hooks are respectively hung in the first through hole and the second oblong hole.

[0014] In the preferred embodiment, the cantilever brace structure includes a horizontal plate, with inclined plates on both sides of the horizontal plate, and a fourth oblong hole on the horizontal plate. The alignment clamp has the following structure: it includes a second right-angle plate and a third right-angle plate. A transition brace is provided in the middle of the third right-angle plate. A second threaded hole is provided on the transition brace. An anti-disengagement pin is provided in the second threaded hole. The anti-disengagement pin is used to limit the fastening rod. Before installation, insert the fastening rod into the fourth through hole, then screw the fastening rod into the second threaded hole, and make the bottom of the second threaded hole contact the end of the fastening rod. During installation, after the fastening rod is inserted into the fourth oblong hole, tighten the second nut on one side of the fastening rod until it abuts against the end of the horizontal plate. The clamping assembly formed by the first right-angle plate, cantilever brace, alignment clamp, and fastening rod is firmly locked to the outside of the precast column.

[0015] The beneficial effects of this invention are as follows: By setting up embedded frames and embedded cylinders inside the precast columns, and reserving installation positions through plungers during manufacturing, while setting up the first vertical rib to ensure the overall vertical bearing capacity of the precast column, the positioning sleeve is used during installation to extend the docking holes and enlarged holes, making it easier for workers to align the second vertical rib located on the floor slab docking seat. At the same time, because the positioning sleeve, in conjunction with the second vertical rib, further completes the filling of the docking holes, the overall installation accuracy is high. In addition, the four-sided pyramidal groove and air guide hole ensure the quality of grouting. Furthermore, the grout anchor overlap completely wraps the positioning sleeve and the second vertical rib. During installation, because the positioning sleeve can ensure the accuracy and efficiency of docking, it avoids the risks of traditional manual inspection, which requires a reflector to be inserted into the bottom of the precast column or even for manual inspection, ensuring convenience. At the same time, the positioning sleeve not only plays a role in the docking process, but also serves as an internal load-bearing structure of the precast column to ensure the load-bearing strength of the precast column, resulting in good economic benefits. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the precast column manufacturing process of the present invention; Figure 2 This is a schematic diagram of the precast column installation process of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the precast column installation process of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the precast column installation process of the present invention. Figure 3 ; Figure 5 This is a schematic diagram of the precast column installation process of the present invention. Figure 4 ; Figure 6 This is a schematic diagram of the precast column installation process of the present invention. Figure 5 ; Figure 7 This is a schematic diagram of the precast column installation process of the present invention. Figure 6 ; Figure 8 This is a schematic diagram of the precast column installation process of the present invention. Figure 7 ; Figure 9 This is a schematic diagram of the precast column installation process of the present invention. Figure 8 ; Figure 10 yes Figure 8 A schematic diagram of the exploded structure; Figure 11 yes Figure 10 Exploded view of the first right-angle plate installation structure of the straightening tie rod; Figure 12 yes Figure 11Enlarged view of point A; Figure 13 yes Figure 9 A schematic diagram of the first right-angle plate structure for installing the straightening tie rod; Figure 14 yes Figure 13 A schematic diagram of the structure for mounting the second bracket plate on the first right-angle plate; Figure 15 yes Figure 14 A schematic diagram of the exploded structure; Figure 16 The internal structure of the precast column of the present invention Figure 1 ; Figure 17 The internal structure of the precast column of the present invention Figure 2 ; Figure 18 The internal structure of the precast column of the present invention Figure 3 ; Figure 19 The internal structure of the precast column of the present invention Figure 4 ; Figure 20 yes Figure 17 Schematic diagram of the embedded frame installation positioning sleeve and embedded cylinder structure; Figure 21 yes Figure 20 Schematic diagram of the embedded frame installation positioning sleeve structure; Figure 22 yes Figure 21 Enlarged view of point B; Figure 23 yes Figure 21 Schematic diagram of the embedded frame structure; Figure 24 Figure 20 Schematic diagram of positioning sleeve structure Figure 1 ; Figure 25 yes Figure 20 Schematic diagram of positioning sleeve structure Figure 2 ; Figure 26 yes Figure 20 Stop sleeve illustration Figure 1 ; Figure 27 yes Figure 20 Stop sleeve illustration Figure 2 ; Figure 28 yes Figure 20 Stop sleeve illustration Figure 3 .

[0017] In the diagram: Precast column 1; First mounting hole 101; Second mounting hole 102; Embedded threaded sleeve 103; Butt joint hole 104; Four-sided pyramidal groove 105; Third mounting hole 106; Enlarged hole 107; Air vent 108; Annular groove 109; Straight groove 110; Grouting hole 111; Grout outlet hole 112; First vertical rib 113; Floor slab butt joint 2; Bearing plate 201; Second vertical rib 202; First threaded hole 203; Straightening tie rod 3; First bidirectional threaded cylinder 301; First threaded rod 302; First hook 303; Adapter sleeve 304; Straight plate 30 5; First through hole 306; Second bidirectional threaded cylinder 307; Second threaded rod 308; Second hook 309; Floor slab hook 4; First right angle plate 5; First ear plate 501; Second ear plate 502; First oblong hole 503; Straight plate 504; Second oblong hole 505; Third oblong hole 506; Hook 6; Adapter assembly 7; Threaded column 701; Fixing plate 702; Second through hole 703; Screw 704; First nut 705; Embedded bracket 8; Ring 801; Straight rod 802; Connecting sleeve 803; First internal thread 804; Lock hole 805; Second internal thread 806; Positioning sleeve 9; First external thread 901; First locking ring 902; Second locking ring 903; First chamfer 904; Second chamfer 905; Notch 906; Clamping surface 907; Third chamfer 908; Embedded cylinder 10; Stop sleeve 11; Second external thread 1101; Spring piece 1102; Fixed end 1103; Moving section 1104; Spacing 1105; Fourth chamfer 1106; Plunger 12; Small end 1201; Large end 1202; Third external thread 1203; First hexagonal head 1204; Countersunk hole 1205; straightening frame 13; push plate 1301; third through hole 1302; top rod 14; insertion rod 15; threaded head 1501; limiting plate 1502; vertical groove 1503; fifth chamfer 1504; sealing head 16; cantilever brace 17; horizontal plate 1701; inclined plate 1702; fourth oblong hole 1703; alignment clamp 18; second right angle plate 1801; third right angle plate 1802; transition brace 1803; fourth through hole 1804; second threaded hole 1805; anti-disengagement nail 1806; fastening rod 19; second nut 20. Detailed Implementation

[0018] Example 1 like Figure 1-9 A construction method for efficient installation of precast columns includes the following steps: S1. Clean the environment at the two floor slab docking points to be installed; S2. The second vertical rib 202 on the floor slab docking seat 2 is detected and corrected simultaneously using the straightening frame 13 until it is all in a vertical state; S3. Use lifting equipment and load-bearing ropes to connect to the hook 6 set on the top of the precast column 1; S4. Lift the column into the air while maintaining a distance from the ground, and complete the initial installation of multiple positioning sleeves 9 in different enlarged holes 107 at the bottom of the precast column 1; S5. Install and lock the insertion rod 15 in the middle of the floor slab docking seat 2, and continue to lift to the work point, hovering above the floor slab docking seat 2. S6. Align the lower part of the positioning sleeve 9 with the corresponding second vertical rib 202 and gradually lower it until the second vertical rib 202 extends into the positioning sleeve 9. S7. Use a wrench to screw the positioning sleeve 9 into the precast column 1 until the first external thread 901 is completely disengaged from the first internal thread 804, and keep the second vertical rib 202 always inside the positioning sleeve 9. S8. Continue to lower the entire precast column 1 until the bottom of the precast column 1 is placed above the designed position above the floor slab docking seat 2. After the precast column 1 is fully lowered and supported, the verticality of the precast column 1 is checked. S9. The lifting equipment is disconnected from the hook 6 by connecting the straightening tie rod 3, the first right angle plate 5 and the alignment clamp 18 to the pre-embedded threaded sleeves 103 in the first mounting hole 101 and the second mounting hole 102 on the upper side of the precast column 1 respectively. S10. Repeat S1 to S9 until all precast columns 1 are installed.

[0019] Precise positioning of the reinforcing bars is a crucial step in the installation of precast columns 1. At the bottom of each layer of precast columns 1, positioning fixtures 3 must be used to ensure the accurate position of the reinforcing bars. Accurate positioning not only ensures construction efficiency but also ensures stability after installation, preventing the reinforcing bars from shifting or moving during concrete pouring. The positioning sleeve 9 of this application accurately aligns the first vertical reinforcing bar 113 and the second vertical reinforcing bar 202 and can also cover them. After pouring, overall anchoring can be achieved. Traditional solutions use extrusion sleeves, but this method results in a larger overall pouring volume, is relatively cumbersome, and has low construction efficiency. There is also a risk that air bubbles cannot be effectively expelled during the pouring process, leading to voids after solidification.

[0020] Currently, during the hoisting of precast columns, in order to ensure the accuracy and efficiency of the connection, the general approach is to manually use a reflector or bend down close to the floor slab to check the hole alignment of the precast column 1 from below. Since the reflector 1 is a mirror image, it cannot accurately reflect the status of different positions during use. Furthermore, since the installation process is a tedious task that requires constant observation, manual inspection of the bottom of the precast column 1 through the reflector may lead to inaccurate observation due to fatigue, affecting construction efficiency and introducing construction risks.

[0021] like Figure 16-19In the preferred embodiment, before S1, the precast column 1 is manufactured. During the manufacturing process, according to the arrangement of the first vertical rib 113, the plunger 12 and the first vertical rib 113 cooperate to form a connecting hole 104 and an enlarged hole 107. The plunger 12 and the embedded frame 8 cooperate to form an annular groove 109 and a straight groove 110. The embedded frame 8 and the embedded cylinder 10 cooperate to form a third mounting hole 106. At the same time, the embedded threaded sleeve 103 is installed at the designed positions of the first mounting hole 101 and the second mounting hole 102. A four-sided pyramidal groove 105 and an air guide hole 108 are set in the middle of the bottom of the precast column 1. The four-sided pyramidal groove 105 and the air guide hole 108 are connected. At the same time, a grouting hole 111 and a grout outlet hole 112 are set.

[0022] This application utilizes a positioning sleeve 9 installed during the lowering of the precast column 1 as an alignment marker to assist in positioning and installation, while ensuring the firmness of the grout anchor. The precast column 1 forms the first vertical load-bearing structure through the first vertical rib 113. The positioning sleeve 9 serves as a connecting component and wraps around the outside of the second vertical rib 202. After positioning and installation, the positioning sleeve 9, together with the second vertical rib 202, forms the second vertical load-bearing structure located below the first vertical rib 113. The two load-bearing structures cooperate to ensure sufficient load-bearing capacity. Furthermore, during installation, because the positioning sleeve 9 extends the connecting hole 104 and the enlarged hole 107, it avoids the need for workers to use a reflector to reach into the area between the precast column 1 and the floor slab connecting seat 2 to view the connecting position of the second vertical rib 202, as is required in traditional installation methods. When a reflector is available, operators still need to look down to check the docking status from the bottom of the precast column 1. This method is inconvenient and risky, and cannot guarantee the docking accuracy, which directly affects the load-bearing capacity of the precast column during use. The positioning sleeve 9, on the other hand, can ensure construction safety while accurately docking the second vertical bar 202. It can also wrap the second vertical bar 202 in the docking hole 104 of the precast column 1 to form a grout anchor lap structure, ensuring the overall construction quality. After hoisting and docking, the verticality of the precast column 1 is measured. Then, the precast column 1 is fixed to the floor slab hook 4 on the outside of the precast column 1 using a right-angle plate 5 and a straightening rod 3 to ensure the accuracy and stability of the precast column 1. After the installation is completed and the design strength is reached, the right-angle plate 5 and the straightening rod 3 are removed and stored for reuse in the next construction location.

[0023] Precise positioning of the reinforcing bars is a crucial step in the installation of precast columns 1. At the bottom of each layer of precast columns 1, positioning fixtures 3 must be used to ensure the accurate position of the reinforcing bars. Accurate positioning not only ensures construction efficiency but also ensures stability after installation, preventing the reinforcing bars from shifting or moving during concrete pouring. The positioning sleeve 9 of this application accurately aligns the first vertical reinforcing bar 113 and the second vertical reinforcing bar 202 and can also cover them. After pouring, overall anchoring can be achieved. Traditional solutions use extrusion sleeves, but this method results in a larger overall pouring volume, is relatively cumbersome, and has low construction efficiency. There is also a risk that air bubbles cannot be effectively expelled during the pouring process, leading to voids after solidification.

[0024] During the fabrication of the precast column 1, a plunger 12 is used to support and align the embedded frame 8, while stirrups are installed to fix the embedded frame 8. The countersunk hole 1205 of the plunger 12 is aligned with the lower part of the first vertical rib 113, maintaining the designed length of coverage. The bottom of the first vertical rib 113 abuts against the countersunk hole 1205. At the same time, the plunger 12 can be locked with the connecting sleeve 803 of the embedded frame 8, thereby ensuring the stability of the plunger 12's own position. The top positions of multiple plungers 12 are kept on the same plane, and the small end of the plunger 12 is aligned with the connecting sleeve. The outer sides of 803 and stop sleeve 11 are blocked. After the prefabricated column 1 is made, the plunger 12 is removed. At this time, the structure of the first vertical rib 113 extending into the docking hole 104 can be formed. At the same time, by aligning the third through hole 1302 on the two push plates 1301 with multiple second vertical ribs 202, the insertion of the second vertical ribs 202 is gradually completed. The state of the second vertical ribs 202 at different positions is corrected as needed. The second vertical ribs 202 are corrected by the straightening frame 13 to ensure the accuracy and convenience of docking.

[0025] In the preferred embodiment, in S2, the structure of the straightening frame 13 includes two parallel push plates 1301 connected by a top rod 14, and multiple third through holes 1302 are provided through the push plates 1301; by aligning the third through holes 1302 on the two push plates 1301 with multiple second vertical ribs 202 provided on the bearing plate 201, the second vertical ribs 202 are gradually inserted, and the state of the second vertical ribs 202 at different positions is corrected as needed; in S5, the insertion rod 15 is aligned with the first thread located in the middle of the floor slab mating seat 2. The insertion rod 15 is screwed into the hole 203. The structure of the insertion rod 15 is as follows: the lower part of the insertion rod 15 is provided with a threaded head 1501 and a limiting plate 1502, and the upper part of the insertion rod 15 is provided with multiple vertical grooves 1503 along the circumference. The length of the vertical grooves 1503 is greater than the depth of the pre-embedded cylinder 10. The top of the insertion rod 15 is provided with a fifth chamfer 1504. The screwing depth of the threaded head 1501 is limited by the limiting plate 1502, while ensuring the perpendicularity of the insertion rod 15 itself relative to the floor slab docking seat 2. The sealing head 16 set at the top of the pre-embedded cylinder 10 cooperates with the vertical grooves 1503 to form a grouting space.

[0026] The second vertical rib 202 is corrected by the straightening frame 13 to ensure the accuracy and convenience of the connection. At the same time, the insertion rod 15 can play an auxiliary positioning role, reducing the lateral compression of the positioning sleeve 9 or causing deformation stability, and achieving the effect of secondary positioning. After pouring, the grout enters the embedded cylinder 10 through the vertical groove 1503. It is blocked by the sealing head 16, which discharges the air and completely fills the embedded cylinder 10. The insertion rod 15 and the embedded cylinder 10 are connected to form a grout anchor structure, which has better overall load-bearing capacity. At the same time, it avoids the problem of excessive pressure on the lower floor slab caused by the use of load-bearing steel pipes, resulting in stress concentration. The design is ingenious and effective.

[0027] Align the insert rod 15 with the threaded hole 203 located in the middle of the floor slab docking seat 2 and screw it in. The length of the vertical groove 1503 is greater than the depth of the embedded cylinder 10. The insert rod 15 can play an auxiliary positioning role, reduce the lateral extrusion of the positioning sleeve 9 or the stability caused by deformation, and achieve the effect of secondary positioning. After pouring, the grout enters the embedded cylinder 10 through the vertical groove 1503. It is blocked by the sealing head 16, which discharges the air and completely fills the embedded cylinder 10. Connect the insert rod 15 and the embedded cylinder 10 to form a grout anchor structure. The overall load-bearing capacity is better. At the same time, it avoids the problem of excessive pressure on the lower floor slab caused by the use of load-bearing steel pipes, which can lead to stress concentration. The design is ingenious and effective.

[0028] The embedded cylinder 10 is placed during the fabrication of the precast column 1. Its position is ensured by the ring 801 in the middle of the embedded frame 8. During subsequent docking, the insertion rod 15 further ensures connection accuracy. The sealing head 16 acts as a limiting and blocking element during grouting, ensuring stability. The insertion rod 15 not only disperses the concentrated stress on the lower floor slab, preventing structural damage, but its guiding function also assists the positioning sleeve 9 in achieving rapid and accurate docking with the precast column 1, reducing repeated adjustments during hoisting and indirectly shortening the tower crane's hoisting time.

[0029] In the preferred embodiment, during the fabrication of the precast column 1, the stop sleeve 11 is first installed into the connecting sleeve 803 of the embedded frame 8. Then, the position of the stop sleeve 11 is adjusted until the bottom of the stop sleeve 11 abuts against the end of the locking hole 805. Then, the small end 1201 of the plunger 12 is screwed into the connecting sleeve 803 through the third external thread 1203 until the countersunk hole 1205 is fitted onto the outside of the first vertical rib 113. After the embedded frame 8 is tied and fixed in place, the mold is sealed and the concrete is poured.

[0030] The embedded frame 8 is placed inside the mold during the fabrication of the precast column 1. Simultaneously, the axis of the connecting sleeve 803 is aligned with the axis of the corresponding first vertical reinforcement 113. This ensures that after construction, the second vertical reinforcement 202 remains coaxial with the first vertical reinforcement 113. The straight rods 802 are evenly distributed, ensuring the installation accuracy of the connecting sleeves 803 at different positions. This also facilitates the subsequent installation of the positioning sleeve 9, ensuring overall docking accuracy and efficiency. Figure 16-19 The diagram shows the internal cross-section of the precast column 1 after it has been manufactured. The annular groove 109 and the straight groove 110 are formed after the embedded frame 8 has been cured with the concrete. They firmly hold the embedded frame 8 in the designed position. The four-sided pyramidal groove 105 ensures that during grouting, the grout dispels air bubbles from low to high and is discharged through the air guide hole 108, thereby avoiding the problem of voids.

[0031] In the preferred embodiment, the precast column 1 is placed in the storage yard, and then lifted using a hoisting device via a hook 6 located at the top of the precast column 1. After suspending, the plunger 12 is removed and the positioning sleeve 9 is fixed inside the connecting sleeve 803. The lifting continues to transfer the precast column 1 to the upper side of the floor slab docking seat 2 at the installation location. The positioning sleeve 9 is then aligned with the second vertical reinforcement 202 and lowered. After lowering, the adapter component 7 is installed in the pre-embedded bolt sleeve 103 at the upper part of the precast column 1. The adapter component 7, cantilever brace 17, fastening rod 19, and second vertical reinforcement 202 are then connected. Nut 20 installs the first right angle plate 5 and the alignment clamp 18 on the outside of the precast column 1. Then, the first right angle plate 5 and the floor slab hook 4 are fixed by the straightening tie rod 3. The structure of the plunger 12 is as follows: it includes a small end 1201 and a large end 1202. The small end 1201 is provided with a third external thread 1203. The end of the large end 1202 is provided with a first hexagonal head 1204. The third external thread 1203 and the first internal thread 804 are matched. The end of the small end 1201 is provided with a countersunk hole 1205. The countersunk hole 1205 abuts against the bottom of the first vertical rib 113.

[0032] When the precast column 1 is hoisted from the storage yard to the installation position, it needs to be suspended above the floor slab docking seat 2. After alignment and confirmation, it can be lowered. At the same time, locking components need to be installed after the precast column is lowered to the design position. However, the traditional stabilizing locking components are operated from both sides, which is cumbersome to install and dismantle. In addition, it is not conducive to the overall enclosure and will also create more pre-embedded openings or drilling holes on the surface of the precast column, which will affect the structure of the precast column to a certain extent and is not aesthetically pleasing.

[0033] Only two pre-embedded threaded sleeves 103 are needed to form stable tie points on both sides of the precast column 1. After the first right-angle plate 5 is installed on the pre-embedded threaded sleeve 103, it cooperates with the alignment clamp 18 set directly opposite it to form a ring structure, which firmly clamps the precast column 1 and locks it under the action of the fastening rod 19. The whole assembly is easy to install and disassemble, easy to adjust, and can also adapt to the tolerances that exist in the manufacturing process of the precast column 1, which improves the locking effect of the precast column. Since different precast columns 1 have different cross-sectional dimensions and heights, the above settings can achieve coverage of the precast column 1's external dimensions within a certain range, resulting in lower operating costs. The hook 6 set at the top provides a lifting point for the hoisting equipment. After the first right-angle plate 5 and the alignment clamp 18 are installed, the connection between the hook 6 and the hoisting equipment can be released, and the precast column 1 can be firmly installed in the design position by its own weight.

[0034] In the preferred embodiment, in S4, when initially installing the positioning sleeve 9 into the enlarged hole 107 on the precast column 1, the screwing process stops when the feedback gradually tightens, that is, when the first locking ring 902 gradually contacts the lower side of the spring piece 1102; in S7, the rotational force is increased using a wrench, and the process stops when the first external thread 901 completely disengages from the first internal thread 804, that is, when the first locking ring 902 completely passes through the top of the spring piece 1102; in S8, the positioning sleeve 9 gradually approaches the building... The precast column 1 is supported by the floor slab docking seat 2 under its own weight. Then, the second locking ring 903 contacts the compression spring 1102 to complete the final fixation of the positioning sleeve 9. That is, the second locking ring 903 is completely inserted into the top of the spring 1102. After the precast column 1 is fully stressed, grouting and pressure maintenance are carried out through the grouting hole 111 and the grout outlet hole 112 on the lower side of the precast column 1 until the casting connection between the precast column 1 and the floor slab docking seat 2 is completed.

[0035] The stop sleeve 11 can be easily installed on the upper side of the connecting sleeve 803. Preferably, three spring pieces 1102 are provided, evenly distributed on the inner side of the stop sleeve 11. The fourth chamfer 1106 facilitates the contact and activation of the first locking ring 902 and the second locking ring 903. At the same time, the interval 1105 serves as a clearance and retraction space, ensuring that the spring piece 1102 is pushed aside by the positioning sleeve 9, thereby causing the positioning sleeve 9 to move upward until the first locking ring 902 and the second locking ring 903 leave the spring piece 1102. At this point, the spring piece 1102 returns to its original position, thus completing the one-way stop and lock function of the positioning sleeve 9. That is, the stop sleeve 11 plays a one-way blocking role. The first locking ring 902 and the second locking ring 903 on the positioning sleeve 9 are pushed and triggered by the lower part of the spring piece 1102 and then retracted and unfolded, so that the first locking ring 902 and the second locking ring 903 can continue to move upward until the first locking ring 902 and the second locking ring 903 are completely separated from the spring piece 1102. At this time, the elastic force is restored, and the spring piece 1102 restricts and blocks the bottom of the first locking ring 902 and the second locking ring 903. At this time, the first locking ring 902 and the second locking ring 903 cannot move downward and retract, thus completing the locking function of the positioning sleeve 9.

[0036] When initially installing the positioning sleeve 9 into the enlarged hole 107 on the precast column 1, during the screwing process, the screwing stops when the feedback gradually tightens, that is, when the first locking ring 902 gradually contacts the lower side of the spring piece 1102; the rotational force is increased by using a wrench, and the first external thread 901 completely disengages from the first internal thread 804, that is, when the first locking ring 902 completely passes through the top of the spring piece 1102; the positioning sleeve 9 gradually approaches and contacts the top of the floor slab docking seat 2, and under the self-weight of the precast column 1, it is supported by the floor slab docking seat 2, and then the second locking ring 903 contacts and squeezes the spring piece 1102 to complete the final state fixation of the positioning sleeve 9, that is, the second locking ring 903 completely penetrates the top of the spring piece 1102. After the precast column 1 is fully stressed, grouting and pressure maintenance are carried out through the grouting hole 111 and the grout outlet hole 112 on the lower side of the precast column 1 until the casting connection between the precast column 1 and the floor slab docking seat 2 is completed.

[0037] Since the positioning sleeve 9 and the docking hole 104 are of equal length, after installation, the upper side of the positioning sleeve 9 wraps around the first vertical reinforcement 113, and the lower side of the positioning sleeve 9 wraps around the second vertical reinforcement 202. This achieves the positioning function while also enabling grout anchoring inside the precast column 1, thereby ensuring the stability of the vertical bearing capacity, avoiding the problem of stress concentration caused by misalignment, resulting in high overall construction efficiency, controllable pouring volume, and good economic benefits.

[0038] like Figure 20-28 In the preferred embodiment, the structure of the embedded frame 8 is as follows: multiple connecting sleeves 803 are respectively connected to a ring 801 by a straight rod 802, a locking hole 805 is provided on one side of the connecting sleeve 803, and a second internal thread 806 is provided on the inner side of the locking hole 805; The structure of the stop sleeve 11 is as follows: the outer side of the stop sleeve 11 is provided with a second external thread 1101, the second internal thread 806 is engaged with the second external thread 1101, the inner side of the stop sleeve 11 is provided with a plurality of spring pieces 1102 along the circumferential direction, the spring piece 1102 includes a fixed end 1103 and a movable section 1104, a gap 1105 is provided between the movable section 1104 and the inner side of the stop sleeve 11, and a fourth chamfer 1106 is provided at the lower part of the spring piece 1102; The positioning sleeve 9 has the following structure: a first locking ring 902 and a second locking ring 903 are provided on the outer side of the positioning sleeve 9; a spring piece 1102 is used to lock the first locking ring 902 and the second locking ring 903; a first external thread 901 is provided between the first locking ring 902 and the second locking ring 903; the outer diameters of the first locking ring 902 and the second locking ring 903 are equal to those of the first external thread 901; the first external thread 901 matches the first internal thread 804; and the first locking ring 902... The upper side of the second locking ring 903 is provided with a first chamfer 904 and a second chamfer 905, respectively. The slope of the first chamfer 904 is greater than that of the second chamfer 905. The second vertical rib 202 is inserted into the positioning sleeve 9. The end of the positioning sleeve 9 that is closer to the first locking ring 902 is provided with a notch 906. The end of the positioning sleeve 9 that is closer to the second locking ring 903 is provided with a third chamfer 908. A clamping surface 907 is provided between the third chamfer 908 and the second locking ring 903.

[0039] As the positioning sleeve 9 gradually extends into the connecting sleeve 803, the first internal thread 804 and the first external thread 901 engage to axially control the positioning sleeve 9, ensuring coaxial accuracy. Then, the first locking ring 902 gradually approaches the spring piece 1102. As the first external thread 901 gradually disengages from the first internal thread, the first locking ring 902 also gradually disengages from the upper side of the spring piece 1102. When the first external thread 901 is completely disengaged from the first internal thread, the first locking ring 902 is also completely disengaged from the spring piece 1102. At this point, the spring piece 1102 resets, and the second locking ring 902, under its own weight, is limited and blocked by the spring piece, preventing it from falling. Since the initial stage is manually controlled... The wrench rotates the positioning sleeve 9, so the triggering of the first chamfer 904 to compress the spring 1102 is a continuous process. The first chamfer 904 has a large slope and small impact feedback, which facilitates the smooth opening of the spring 1102 while avoiding damage to the spring 1102. Subsequently, when the positioning sleeve 9 approaches the floor slab docking seat 2 under the weight of the precast column 1, the positioning sleeve 9 is supported by the upward force of the floor slab docking seat 2. The precast column 1 has a large weight, so the positioning sleeve 9 is impacted and squeezed into the upper part of the spring 1102. The second chamfer 905 has a large slope, which facilitates better pushing open the spring 1102 to complete the locking of the second locking ring 903.

[0040] The overall length of the positioning sleeve 9 is consistent with the length of the docking hole 104, thus ensuring that when the positioning sleeve 9 is fully inserted into the docking hole 104, the top of the positioning sleeve 9 contacts a portion of the bottom of the first vertical rib 113, thereby forming a grout anchor structure. After the positioning sleeve 9 is fully inserted into the docking hole 104, the upper and lower sides of the positioning sleeve 9 respectively wrap the first vertical rib 113 and the second vertical rib 202. After grouting, due to the gap between the stop sleeve 11 and the positioning sleeve 9, and the notch 906 forming a grout flow channel, it is ensured that all gaps are fully covered and filled during the grouting process, forming a stable anchor structure and ensuring the strength of the precast column 1.

[0041] like Figure 10-15 In the preferred embodiment, the structure of the first right-angle plate 5 is as follows: a first ear plate 501 and a second ear plate 502 are respectively provided on both sides of the first right-angle plate 5. The first ear plate 501 and the first oblong hole 503 are both provided with the first oblong hole 503. A straight extension plate 504 is provided in the middle of the first right-angle plate 5. One side of the straightening rod 3 is connected to the straight extension plate 504. The straight extension plate 504 is provided with the second oblong hole 505 and the third oblong hole 506. The structure of the adapter assembly 7 is as follows: it includes a threaded post 701 and a fixing plate 702. The threaded post 701 is located inside the pre-embedded threaded sleeve 103. A second through hole 703 is provided through the fixing plate 702. A screw 704 passes through the second through hole 703 and the first oblong hole 503. The screw 704 is connected to the first ear plate 501 and the second ear plate 502 through the first nut 705.

[0042] The first right-angle plate 5 is fixed to the precast column 1 by the first ear plate 501 and the second ear plate 502. The straight extension plate 504 is used to lock the whole structure under the action of the straightening tie rod 3. The operation is simple and the effect is good. The pre-embedded screw sleeve 103 provides a stable tie point for the first right-angle plate 5, ensuring that the first right-angle plate 5 and the precast column 1 are fully fixed. At the same time, the adapter component 7 locks the whole structure from different heights on both sides. Under the condition of halving the anchoring nodes, the precast column 1 is fully fixed. The whole installation and disassembly are simple. At the same time, under the influence of the precast column 1 structure, the grouting treatment is simple after the disassembly is completed and the labor intensity of repair construction is lower.

[0043] In the preferred embodiment, the structure of the straightening rod 3 is as follows: it includes a first bidirectional threaded cylinder 301 and a second bidirectional threaded cylinder 307. The first bidirectional threaded cylinder 301 has a first threaded rod 302 on both sides, and a first hook 303 is provided at the end of the first threaded rod 302. The two first hooks 303 are respectively hung in the floor slab hook 4 and the third oblong hole 506. An adapter sleeve 304 is sleeved on the outside of the first threaded rod 302 located on the upper side. The second bidirectional threaded cylinder 307 has a second threaded rod 308 on both sides, and a second hook 309 is provided at the end of the second threaded rod 308. A straight plate 305 is provided on the adapter sleeve 304, and a first through hole 306 is provided through the straight plate 305. The two second hooks 309 are respectively hung in the first through hole 306 and the second oblong hole 505.

[0044] The adapter sleeve 304 and the first threaded rod 302 are threadedly connected. The length and locking force of the first threaded rod 302 and the second threaded rod 308 can be adjusted by the first bidirectional threaded cylinder 301 and the second bidirectional threaded cylinder 307 respectively. At the same time, when either the first bidirectional threaded cylinder 301 or the second bidirectional threaded cylinder 307 is damaged under extreme conditions, the overall support stability can still be guaranteed. When the adjustment of the first bidirectional threaded cylinder 301 fails, the second bidirectional threaded cylinder 307 can act as an extension rod. Simultaneously, by adjusting the position of the adapter sleeve 304, the force point of the first threaded rod 302 can be changed, ensuring that the axes of the second bidirectional threaded cylinder 307 and the first bidirectional threaded cylinder 301 are parallel, thus providing stable support and locking force for the precast column 1. When the adjustment of the second bidirectional threaded cylinder 307 fails, by adjusting the position of the adapter sleeve 304, and adjusting the second bidirectional threaded cylinder 307 to be parallel to the axis of the first bidirectional threaded cylinder 301, the second hook 309 of the second threaded rod 308 engages with the third oblong hole 506, still ensuring stable support and locking force for the precast column 1. When the adjustment range of the adapter sleeve 304 is limited, but the first bidirectional threaded cylinder 301 is effective, the second bidirectional threaded cylinder 307 and the second threaded rod 308 can be removed. Therefore, stable support for the precast column 1 can be achieved under various conditions, with mutual redundancy and backup, greatly reducing the risk of the straightening rod 3 completely failing and becoming unusable.

[0045] In the preferred embodiment, the cantilever brace 17 has the following structure: it includes a horizontal plate 1701, with inclined plates 1702 on both sides of the horizontal plate 1701, and a fourth oblong hole 1703 on the horizontal plate 1701. The alignment clamp 18 has the following structure: it includes a second right-angle plate 1801 and a third right-angle plate 1802. A transition brace 1803 is provided in the middle of the third right-angle plate 1802. A second threaded hole 1805 is provided on the transition brace 1803. An anti-disengagement pin 1806 is provided in the second threaded hole 1805. The anti-disengagement pin 1806 is used to limit the fastening rod 19. Before installation, insert the fastening rod 19 into the fourth through hole 1804, then screw the fastening rod 19 into the second threaded hole 1805, and make the bottom of the second threaded hole 1805 contact the end of the fastening rod 19. During installation, after the fastening rod 19 is inserted into the fourth oblong hole 1703, tighten the second nut 20 on one side of the fastening rod 19 until it abuts against the end of the horizontal plate 1701. The clamping assembly formed by the first right angle plate 5, the cantilever brace 17, the alignment clamping plate 18 and the fastening rod 19 is firmly locked on the outside of the precast column 1.

[0046] The inclined plate 1702 strengthens the overall load-bearing capacity and increases the contact area with the precast column 1. Since the pre-embedded bolt sleeve 103 is a stable tie point, the overall tension is transferred to the alignment clamp 18 through the cooperation of the horizontal plate 1701 and the inclined plate 1702, ensuring sufficient wrapping of the precast column 1. When the cross-sectional size of the precast column 1 is small and the height is limited, the installation method of five alignment clamps 18 can be directly adopted as needed, thereby ensuring the overall construction efficiency. The second right-angle plate 1801 is larger than the third right-angle plate 1802, ensuring sufficient contact surface with the precast column 1 while ensuring simple operation. The anti-detachment nail 1806 ensures that the fastening rod 19 will not fall off the alignment clamp 18 during locking and loosening, ensuring safe and efficient operation. The anti-detachment nail 1806 can be screwed to the appropriate depth on the transition brace 1803 as needed.

[0047] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A construction method for efficient installation of precast columns, characterized by: Includes the following steps: S1. Clean the environment at the floor slab docking seat (2) to be installed; S2. The second vertical bar (202) on the floor slab docking seat (2) is inspected and corrected synchronously using the straightening frame (13) until all of them are in a vertical state; S3. Use lifting equipment and load-bearing ropes to connect to the hook (6) set on the top of the precast column (1); S4. Lift the column into the air and keep it at a distance from the ground. Complete the initial installation of multiple positioning sleeves (9) in different enlarged holes (107) at the bottom of the precast column (1). S5. Install the insert rod (15) in the middle of the floor slab docking seat (2) and lock it. At the same time, continue to lift to the work point and suspend it above the floor slab docking seat (2). S6. Align the lower part of the positioning sleeve (9) with the corresponding second vertical rib (202) and lower it gradually until the second vertical rib (202) extends into the positioning sleeve (9); S7. Use a wrench to screw the positioning sleeve (9) into the precast column (1) until the first external thread (901) is completely disengaged from the first internal thread (804), and keep the second vertical rib (202) always inside the positioning sleeve (9); S8. Continue to lower the precast column (1) as a whole until the bottom of the precast column (1) is placed above the floor slab dock (2) at the designed position. After the precast column (1) is fully lowered and supported, the verticality of the precast column (1) is checked. S9. The straightening tie rod (3), the first right angle plate (5) and the alignment clamp (18) are connected to the pre-embedded threaded sleeve (103) in the first mounting hole (101) and the second mounting hole (102) on the upper side of the precast column (1), respectively, and the lifting equipment is disconnected from the hook (6). S10. Repeat S1 to S9 until all precast columns (1) are installed.

2. The construction method for efficient installation of precast columns according to claim 1, characterized in that: Before S1, the precast column (1) is made. During the manufacturing process, according to the arrangement of the first vertical rib (113), the docking hole (104) and the enlarged hole (107) are formed by the cooperation of the plunger (12) and the first vertical rib (113). The annular groove (109) and the straight groove (110) are formed by the cooperation of the plunger (12) and the embedded frame (8). The third mounting hole (106) is formed by the cooperation of the embedded frame (8) and the embedded cylinder (10). At the same time, the embedded threaded sleeve (103) is installed at the designed position of the first mounting hole (101) and the second mounting hole (102). A four-sided pyramidal groove (105) and an air guide hole (108) are set in the middle of the bottom of the precast column (1). The four-sided pyramidal groove (105) and the air guide hole (108) are connected. At the same time, a grouting hole (111) and a grout outlet hole (112) are set.

3. The construction method for efficient installation of precast columns according to claim 1, characterized in that: In S2, the structure of the straightening frame (13) is as follows: it includes two parallel push plates (1301), which are connected by a top rod (14). Multiple third through holes (1302) are provided through the push plates (1301). By aligning the third through holes (1302) on the two push plates (1301) with multiple second vertical ribs (202) provided on the bearing plate (201), the insertion of the second vertical ribs (202) is completed step by step, and the state of the second vertical ribs (202) at different positions is corrected as needed. In S5, the insertion rod (15) is aligned with the first threaded hole (203) located in the middle of the floor slab docking seat (2). The structure of the insertion rod (15) is as follows: the lower part of the insertion rod (15) is provided with a threaded head (1501) and a limiting plate (1502), the upper part of the insertion rod (15) is provided with multiple vertical grooves (1503) along the circumferential direction, the length of the vertical grooves (1503) is greater than the depth of the pre-embedded cylinder (10), and the top of the insertion rod (15) is provided with a fifth chamfer (1504); the screwing depth of the threaded head (1501) is limited by the limiting plate (1502), while ensuring the verticality of the insertion rod (15) itself relative to the floor slab docking seat (2), and the grouting space is formed by the sealing head (16) set at the top of the pre-embedded cylinder (10) in conjunction with the vertical grooves (1503).

4. The construction method for efficient installation of precast columns according to claim 2, characterized in that: During the fabrication of the precast column (1), the stop sleeve (11) is first installed into the connecting sleeve (803) of the embedded frame (8). Then, the position of the stop sleeve (11) is adjusted until the bottom of the stop sleeve (11) abuts against the end of the lock hole (805). Then, the small end (1201) of the plunger (12) is screwed into the connecting sleeve (803) through the third external thread (1203) until the countersunk hole (1205) is fitted on the outside of the first vertical bar (113). Then, the embedded frame (8) is tied and fixed in place as a whole, and the mold is sealed for casting.

5. The construction method for efficient installation of precast columns according to claim 4, characterized in that: The precast column (1) is placed in the storage yard, and then lifted using a hoisting device with a hook (6) set on the top of the precast column (1). After suspending, the plunger (12) is removed and the positioning sleeve (9) is fixed in the connecting sleeve (803). The precast column (1) is then lifted and transferred to the upper side of the floor slab docking seat (2) at the installation location. The positioning sleeve (9) is then aligned with the second vertical bar (202) and lowered. After the lowering is completed, the adapter assembly (7) is installed in the pre-embedded screw sleeve (103) at the upper part of the precast column (1). The adapter assembly (7), cantilever brace (17), fastening rod (19) and second nut (20) are used to connect the precast column (1) to the floor slab docking seat (2). The first right angle plate (5) and the alignment clamp (18) are installed on the outside of the precast column (1). Then, the first right angle plate (5) and the floor slab hook (4) are fixed by the straightening tie rod (3). The structure of the plunger (12) is as follows: it includes a small end (1201) and a large end (1202). The small end (1201) is provided with a third external thread (1203). The large end (1202) is provided with a first hexagonal head (1204). The third external thread (1203) and the first internal thread (804) are matched. The small end (1201) is provided with a countersunk hole (1205). The countersunk hole (1205) abuts against the bottom of the first vertical bar (113).

6. The construction method for efficient installation of precast columns according to claim 4, characterized in that: in In S4, when the positioning sleeve (9) is initially installed into the enlarged hole (107) on the precast column (1), it stops when the feedback gradually tightens, that is, when the first locking ring (902) gradually contacts the lower side of the spring piece (1102) during the screwing process; in S7, the rotational force is increased by using a wrench, and it stops when the first external thread (901) completely disengages from the first internal thread (804), that is, when the first locking ring (902) completely passes through the top of the spring piece (1102); in S8, the positioning sleeve (9) gradually approaches the floor slab mating seat (2). The top of the precast column (1) is in contact with the floor slab docking seat (2) under its own weight. Then, the second locking ring (903) contacts the compression spring (1102) to complete the final state fixation of the positioning sleeve (9). That is, the second locking ring (903) is completely inserted into the top of the spring (1102). After the precast column (1) is fully stressed, grouting and pressure preservation are carried out through the grouting hole (111) and grout outlet hole (112) on the lower side of the precast column (1) until the casting connection between the precast column (1) and the floor slab docking seat (2) is completed.

7. The construction method for efficient installation of precast columns according to claim 4, characterized in that: The structure of the pre-embedded frame (8) is as follows: multiple connecting sleeves (803) are connected to a ring (801) by a straight rod (802), a locking hole (805) is provided on one side of the connecting sleeve (803), and a second internal thread (806) is provided inside the locking hole (805). The structure of the stop sleeve (11) is as follows: the outer side of the stop sleeve (11) is provided with a second external thread (1101), the second internal thread (806) is engaged with the second external thread (1101), the inner side of the stop sleeve (11) is provided with a plurality of spring pieces (1102) along the circumferential direction, the spring piece (1102) includes a fixed end (1103) and a movable section (1104), a gap (1105) is provided between the movable section (1104) and the inner side of the stop sleeve (11), and a fourth chamfer (1106) is provided at the lower part of the spring piece (1102). The positioning sleeve (9) has the following structure: a first locking ring (902) and a second locking ring (903) are provided on the outer side of the positioning sleeve (9); a spring piece (1102) is used to lock the first locking ring (902) and the second locking ring (903); a first external thread (901) is provided between the first locking ring (902) and the second locking ring (903); the outer diameter of the first locking ring (902) and the second locking ring (903) are equal to the outer diameter of the first external thread (901); the first external thread (901) and the first internal thread (804) are matched; the first locking ring (902)... The upper side of the second locking ring (903) is provided with a first chamfer (904) and a second chamfer (905), respectively. The slope of the first chamfer (904) is greater than that of the second chamfer (905). The second vertical rib (202) is inserted into the positioning sleeve (9). The end of the positioning sleeve (9) closer to the first locking ring (902) is provided with a notch (906). The end of the positioning sleeve (9) closer to the second locking ring (903) is provided with a third chamfer (908). A clamping surface (907) is provided between the third chamfer (908) and the second locking ring (903).

8. The construction method for efficient installation of precast columns according to claim 5, characterized in that: The structure of the first right angle plate (5) is as follows: a first ear plate (501) and a second ear plate (502) are respectively provided on both sides of the first right angle plate (5). The first ear plate (501) and the first oblong hole (503) are both provided with the first oblong hole (503). A straight plate (504) is provided in the middle of the first right angle plate (5). One side of the straightening rod (3) is connected to the straight plate (504). The straight plate (504) is provided with the second oblong hole (505) and the third oblong hole (506). The structure of the adapter assembly (7) is as follows: it includes a threaded post (701) and a fixing plate (702). The threaded post (701) is located inside the pre-embedded threaded sleeve (103). A second through hole (703) is provided through the fixing plate (702). A screw (704) passes through the second through hole (703) and the first oval hole (503). The screw (704) is connected by a first nut (705), a first ear plate (501), and a second ear plate (502).

9. The construction method for efficient installation of precast columns according to claim 8, characterized in that: The structure of the straightening rod (3) is as follows: it includes a first bidirectional threaded cylinder (301) and a second bidirectional threaded cylinder (307). The first bidirectional threaded cylinder (301) is provided with a first threaded rod (302) on both sides. The first threaded rod (302) is provided with a first hook (303) at the end. The two first hooks (303) are respectively hung in the floor slab hook (4) and the third oblong hole (506). The first threaded rod (302) located on the upper side is fitted with an adapter sleeve (304). The second bidirectional threaded cylinder (307) is provided with a second threaded rod (308) on both sides. The second threaded rod (308) is provided with a second hook (309) at the end. The adapter sleeve (304) is provided with a straight plate (305). The straight plate (305) is provided with a first through hole (306). The two second hooks (309) are respectively hung in the first through hole (306) and the second oblong hole (505).

10. The construction method for efficient installation of precast columns according to claim 5, characterized in that: The structure of the cantilever brace (17) is as follows: it includes a horizontal plate (1701), and inclined plates (1702) are respectively provided on both sides of the horizontal plate (1701). The fourth oval hole (1703) is provided on the horizontal plate (1701). The alignment clamp (18) has the following structure: it includes a second right-angle plate (1801) and a third right-angle plate (1802). A transition brace (1803) is provided in the middle of the third right-angle plate (1802). A second threaded hole (1805) is provided on the transition brace (1803). An anti-disengagement pin (1806) is provided in the second threaded hole (1805). The anti-disengagement pin (1806) is used to limit the fastening rod (19). Before installation, insert the fastening rod (19) into the fourth through hole (1804), then screw the fastening rod (19) into the second threaded hole (1805), and make the bottom of the second threaded hole (1805) and the end of the fastening rod (19) contact each other. During installation, after the fastening rod (19) is inserted into the fourth oval hole (1703), tighten the second nut (20) on one side of the fastening rod (19) until it abuts against the end of the horizontal plate (1701). The clamping whole formed by the first right angle plate (5), the cantilever brace (17), the alignment clamp (18) and the fastening rod (19) is firmly locked on the outside of the precast column (1).

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