CN211286040U - Prestressed threaded steel bar connecting structure of precast concrete column - Google Patents
Prestressed threaded steel bar connecting structure of precast concrete column Download PDFInfo
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- CN211286040U CN211286040U CN201921480858.7U CN201921480858U CN211286040U CN 211286040 U CN211286040 U CN 211286040U CN 201921480858 U CN201921480858 U CN 201921480858U CN 211286040 U CN211286040 U CN 211286040U
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Abstract
A prestressed threaded steel bar connecting structure of a precast concrete column relates to the field of building construction, and comprises a foundation, a lower prestressed threaded steel bar pre-embedded in the foundation, a precast column, an upper prestressed threaded steel bar movably connected in the precast column in a penetrating manner, and a threaded connecting sleeve connecting the upper prestressed threaded steel bar and the lower prestressed threaded steel bar; a leveling layer is poured on the top surface of the foundation, and the threaded connecting sleeve is arranged on the leveling layer; iron cushion blocks are padded at four corners between the top surface of the leveling layer and the bottom surface of the prefabricated column, a post-pouring layer is poured, and the thickness of the post-pouring layer is 20 mm. The utility model provides a when current concrete column prestressing steel connects, connect inconveniently, the long problem of occupation time to it is inconvenient to solve the bar straightening, destroys the problem of having constructed the structure.
Description
Technical Field
The utility model relates to a construction field, especially a precast concrete post prestressing force screw steel bar connection structure.
Background
The reinforced concrete structure has been widely applied to engineering fields such as tunnel bridges and civil buildings, and has become the most common building material in our lives. Among them, the concrete column is the most critical part in the bearing system of the structure, and its safety performance influences the overall performance of the whole structure. The building designer needs to realize rapid construction as far as possible on the premise that the column cannot be subjected to brittle failure under extreme working conditions and cannot be subjected to too large deformation and displacement.
In the construction of a precast concrete structure, the common connection method of the upper and lower prestressed tendons of a concrete frame column comprises the steps of pouring reserved steel bars in situ and welding the reserved steel bars in situ, but the construction of the two connection methods takes long time and is not economical; meanwhile, the two connection methods are inconvenient in steel bar straightening, and the foundation layer is disturbed by shaking the steel bars during straightening, so that the foundation compactness is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a precast concrete post prestressing force screw thread steel bar connection structure, when solving current concrete post prestressing force reinforcing bar and connecting, connect inconveniently, the long problem of occupation time to it is inconvenient to solve the bar straightening, destroys the problem of having under construction structure.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a prestressed threaded steel bar connecting structure of a precast concrete column comprises a foundation, a lower prestressed threaded steel bar pre-embedded in the foundation, a precast column, an upper prestressed threaded steel bar movably connected in the precast column in a penetrating manner, and a threaded connecting sleeve for connecting the upper prestressed threaded steel bar and the lower prestressed threaded steel bar; a leveling layer is poured on the top surface of the foundation, and the threaded connecting sleeve is arranged on the leveling layer; iron cushion blocks are padded at four corners between the top surface of the leveling layer and the bottom surface of the prefabricated column, a post-pouring layer is poured, and the thickness of the post-pouring layer is 20 mm.
Further, the upper opening of the lower prestressed twisted steel bar is provided with a detachable upper opening temporary fixing device, and the lower opening is provided with a lower opening temporary fixing device.
Furthermore, the temporary upper opening fixing device comprises an upper fixing plate and a nut fastened on the upper surface of the upper fixing plate, and a gasket is arranged between the upper fixing plate and the nut;
the lower temporary fixing device comprises a lower fixing plate and a nut fastened on the lower surface of the lower fixing plate, and a gasket is arranged between the lower fixing plate and the nut in a cushioning mode.
Furthermore, the inner surface of the threaded connection sleeve is sleeved with internal threads, and the length of the threaded connection sleeve is 126mm, the outer diameter of the threaded connection sleeve is 50mm, and the inner diameter of the threaded connection sleeve is 38 mm.
Furthermore, a steel pipe is vertically penetrated and embedded in the prefabricated column, and the upper prestressed threaded steel bar is movably inserted in the steel pipe.
Compared with the prior art, the utility model has the following characteristics and beneficial effect: the steel pipe is arranged in the prefabricated column, so that the upper prestressed threaded steel bar is movably connected in the prefabricated column in a penetrating manner, and the upper and lower prestressed threaded steel bars are directly connected together on a construction site by arranging the threaded connecting sleeve, so that the connection is simple and convenient, the construction speed is accelerated, the construction cost is saved, the connection construction of the upper and lower prestressed threaded steel bars is dry construction, the labor intensity is reduced, the engineering progress is accelerated, and the safety and the durability of the connecting structure are improved; the utility model discloses at the earlier screed-coat is pour at basic top surface to reserve the back height of pouring that 20mm is thick, when making level basic top surface, fixed prestressing force screw steel bar down, be convenient for go up prestressing force screw steel bar's alignment, when going up prestressing force screw steel bar alignment, because there is the fixed of screed-coat, can not rock the reinforcing bar because of the alignment and cause the disturbance to basic concrete, influence the closely knit degree of basis.
Drawings
Fig. 1 is a schematic view of a prestressed twisted steel coupling structure for a precast concrete column.
Fig. 2 is a schematic view of a threaded connection sleeve.
Fig. 3 is an elevation view corresponding to step one.
Fig. 4 is an elevation view corresponding to step two.
Fig. 5 is an elevation view corresponding to step seven.
Fig. 6 is an elevation corresponding to step eight.
Fig. 7 is an elevation corresponding to step nine.
Reference numerals: the steel pipe formwork tensioning device comprises 1-lower prestressed threaded steel bars, 2-upper temporary fixing devices, 3-lower temporary fixing devices, 4-leveling layer formwork, 5-leveling layer, 6-prefabricated columns, 7-steel pipes, 8-post-pouring layer, 9-foundation, 10-upper prestressed threaded steel bars, 11-iron cushion blocks, 12-threaded connecting sleeves, 13-post-pouring layer formwork and 14-tensioning equipment.
Detailed description of the preferred embodiments
A prestressed threaded steel bar connecting structure of a precast concrete column is shown in an embodiment in figure 1 and comprises a foundation 9, a lower prestressed threaded steel bar 1 pre-embedded in the foundation, a precast column 6, an upper prestressed threaded steel bar 10 movably connected in the precast column 6 in a penetrating manner, and a threaded connecting sleeve 12 connecting the upper prestressed threaded steel bar and the lower prestressed threaded steel bar; a leveling layer 5 is poured on the top surface of the foundation 9, and the threaded connecting sleeve 12 is arranged on the leveling layer 5; iron cushion blocks 11 are padded at four corners between the top surface of the leveling layer 5 and the bottom surface of the prefabricated column 6, a post-cast layer 8 is poured, and the thickness of the post-cast layer 8 is 20 mm; the upper opening of the lower prestressed twisted steel bar 1 is provided with a detachable upper opening temporary fixing device 2, and the lower opening is provided with a lower opening temporary fixing device 3; the upper temporary fixing device 2 comprises an upper fixing plate and a nut fastened on the upper surface of the upper fixing plate, and a gasket is arranged between the upper fixing plate and the nut; the lower opening temporary fixing device 3 comprises a lower fixing plate and a nut fastened on the lower surface of the lower fixing plate, and a gasket is arranged between the lower fixing plate and the nut; referring to fig. 2, the inner surface of the threaded connection sleeve 12 is sleeved with internal threads, and the length of the internal threads is 126mm, the outer diameter of the internal threads is 50mm, and the inner diameter of the internal threads is 38 mm; a steel pipe 7 is vertically penetrated and embedded in the prefabricated column 6, and an upper prestressed threaded steel bar 10 is movably inserted in the steel pipe 7; the utility model discloses in, about, go up the reinforcing bar all adopt prestressing force twisted steel, be convenient for with threaded connection sleeve, direct threaded connection.
The construction method applying the precast concrete column prestressed twisted steel bar connection structure comprises the following steps:
referring to fig. 3, in the first step, lower prestressed twisted steel bars 1 are pre-buried in a foundation, upper temporary fixing devices 2 are installed between the top ends of the lower prestressed twisted steel bars, lower temporary fixing devices 3 are installed between the bottom ends of the lower prestressed twisted steel bars, and then the foundation is poured; twelve lower prestressed threaded steel bars 1 pre-embedded in the foundation 9 are arranged in four groups, and three lower prestressed threaded steel bars in each group are arranged in a regular triangle.
Referring to fig. 4, in the second step, after the foundation is formed and demoulded, the temporary fixing device for the upper opening between the top ends of the lower prestressed threaded reinforcing steel bars is removed.
And step three, removing rough concrete on the surface of the foundation 9, and pouring a leveling layer 5 on the surface of the foundation in order to meet the design elevation of the foundation.
Fourthly, erecting a leveling layer template 4 around the lower prestressed threaded steel bar, supporting the outer ring of the leveling layer template 4 to the vertically arranged steel bar in the ground through a lower chisel, pouring concrete of a leveling layer 5, then sleeving the threaded connection sleeve 12 on the lower prestressed threaded steel bar in a threaded manner, and temporarily plugging the upper opening of the threaded connection sleeve 12 by using an adhesive tape.
And fifthly, placing iron cushion blocks 11 with the height of 20mm at four corners of the leveling layer respectively, and pouring slurry with the height of 20mm reserved above the leveling layer.
Step six, pouring the prefabricated column: pre-burying a steel pipe 7 in a precast column mould, and then pouring precast column concrete; the arrangement structure of the steel pipes in the prefabricated column 6 corresponds to the lower prestressed twisted steel bar 1;
and step seven, movably penetrating the upper prestressed reinforcement into the steel pipe, hoisting the prefabricated column 6, slowly lowering the prefabricated column, stopping lowering when the bottom surface of the prefabricated column is 50cm away from the ground, then inserting the upper prestressed threaded steel bar into the threaded connecting sleeve 12 in a threaded manner, butting the upper prestressed threaded steel bar with the lower prestressed threaded steel bar, fastening, and then continuously and slowly lowering the prefabricated column until the prefabricated column falls on the iron cushion block 11.
And step eight, straightening the upper prestressed twisted steel.
And step nine, building a post-pouring layer template 13 on the outer ring of the prefabricated column on the leveling layer, pouring grouting material within the 20mm post-pouring height range reserved on the leveling layer to form a post-pouring layer 8, and connecting the leveling layer and the prefabricated column.
Referring to fig. 7, step ten, after the grouting strength of the post-cast layer at the bottom of the precast column meets the requirement, tensioning and fastening the upper and lower prestressed threaded steel bars on the top surface of the precast column by using tensioning equipment 14, and cutting the exposed redundant part of the upper prestressed threaded steel bar after tensioning is finished.
Claims (5)
1. The utility model provides a precast concrete post prestressing force screw thread steel bar connection structure which characterized in that: the steel bar connecting structure comprises a foundation (9), a lower prestressed threaded steel bar (1) pre-buried in the foundation, a prefabricated column (6), an upper prestressed threaded steel bar (10) movably connected in the prefabricated column (6) in a penetrating manner, and a threaded connecting sleeve (12) connecting the upper and lower prestressed threaded steel bars; a leveling layer (5) is poured on the top surface of the foundation (9), and the threaded connecting sleeve (12) is arranged on the leveling layer (5); iron cushion blocks (11) are padded at four corners between the top surface of the leveling layer (5) and the bottom surface of the prefabricated column (6), a post-pouring layer (8) is poured, and the thickness of the post-pouring layer (8) is 20 mm.
2. The precast concrete column prestressed twisted steel connecting structure according to claim 1, characterized in that: the upper opening of the lower prestressed twisted steel (1) is provided with a detachable upper opening temporary fixing device (2), and the lower opening is provided with a lower opening temporary fixing device (3).
3. The precast concrete column prestressed twisted steel connecting structure according to claim 2, characterized in that: the upper opening temporary fixing device (2) comprises an upper fixing plate and a nut fastened on the upper surface of the upper fixing plate, and a gasket is arranged between the upper fixing plate and the nut;
the lower temporary fixing device (3) comprises a lower fixing plate and a nut fastened on the lower surface of the lower fixing plate, and a gasket is arranged between the lower fixing plate and the nut.
4. The precast concrete column prestressed twisted steel connecting structure according to claim 1, characterized in that:
the inner surface of the threaded connection sleeve (12) is sleeved with internal threads, and the length of the threaded connection sleeve is 126mm, the outer diameter of the threaded connection sleeve is 50mm, and the inner diameter of the threaded connection sleeve is 38 mm.
5. The precast concrete column prestressed twisted steel connecting structure according to claim 1, characterized in that: a steel pipe (7) is vertically penetrated and embedded in the prefabricated column (6), and the upper prestressed threaded steel bar (10) is movably inserted in the steel pipe (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921480858.7U CN211286040U (en) | 2019-09-06 | 2019-09-06 | Prestressed threaded steel bar connecting structure of precast concrete column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921480858.7U CN211286040U (en) | 2019-09-06 | 2019-09-06 | Prestressed threaded steel bar connecting structure of precast concrete column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211286040U true CN211286040U (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921480858.7U Active CN211286040U (en) | 2019-09-06 | 2019-09-06 | Prestressed threaded steel bar connecting structure of precast concrete column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211286040U (en) |
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2019
- 2019-09-06 CN CN201921480858.7U patent/CN211286040U/en active Active
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