CN208310140U - A kind of precast stair accurate assembly accessory part - Google Patents
A kind of precast stair accurate assembly accessory part Download PDFInfo
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- CN208310140U CN208310140U CN201820743490.8U CN201820743490U CN208310140U CN 208310140 U CN208310140 U CN 208310140U CN 201820743490 U CN201820743490 U CN 201820743490U CN 208310140 U CN208310140 U CN 208310140U
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Abstract
The utility model provides a kind of precast stair accurate assembly accessory part, the built-in fitting including being embedded in structural beams, the correction mechanism for correcting built-in fitting position, the pilot hole mechanism being aligned for the pin key hole in precast stair with built-in fitting；Preferably, the built-in fitting is two bolts being embedded in structural beams.Utility model has the advantages that limiting the horizontal position of built-in fitting using correction mechanism, after pouring landing beam concrete curing to prescribed strength, again by the hoisting prefabricated stair of tower crane, stair pin key hole is passed through using pilot hole mechanism and entangles the positioning of built-in fitting pilot hole, reach the accurate splicing of precast stair Yu cast-in-place landing beam built-in fitting, it is ensured that be reliably connected.
Description
Technical field
The utility model relates to precast stair mounting technology, a kind of specifically precast stair accurate assembly assisted group
Part.
Background technique
Prefabricated concrete structure is the direction of the development of China's building industrialization in recent years, traditional cast-in-place concrete stair mould
Plate construction is complicated, casting and compacting of concrete can not one-pass molding, it is poor in high temperature, arid season maintenance effect, easily cause height of marking time
Injustice generally requires later period chisel and beats repairing treatment.So using precast stair substantially now, precast stair and landing beam assembly are solid
It is fixed.And precast stair obtains the large-scale popularization of government and construction unit.
But in the prior art, often there is the problem of assembly precision difference in precast stair, and installation quality cannot obtain effectively
Guarantee, the construction efficiency and function for seriously affecting precast stair use.
Utility model content
The technical issues of the utility model solves is that precast stair assembly precision control in the prior art is difficult.
The utility model solves the above problems by the following technical programs:
A kind of precast stair accurate assembly accessory part, including the built-in fitting, pre-buried for correcting being embedded in structural beams
The correction mechanism of part position, the pilot hole mechanism being aligned for the pin key hole in precast stair with built-in fitting；
Preferably, the built-in fitting is two bolts being embedded in structural beams.
Preferably, the correction mechanism includes that cross bar and cross bar both ends are fixed with towards consistent sleeve；The sleeve
It is vertical with cross bar；The axis spacing of two sleeves is two bolt axis spacing；The sleeve diameter is slightly larger than the diameter of bolt.
Preferably, the middle position of the cross bar is provided with the centering graticule that structure middle line centering is completed with lower layer.
Preferably, the pilot hole mechanism includes drawing ball, skirt；The ball cover that draws is located on skirt；The ball that draws is away from skirt
The height of bottom end is less than the length of built-in fitting；The maximum outside diameter for drawing ball is slightly less than pin key bore dia；The skirt internal diameter omits
Greater than built-in fitting diameter.
Preferably, the sleeve diameter is greater than diameter of bolt 2mm.
Preferably, the skirt internal diameter is greater than diameter of bolt 2mm.
Preferably, the ball maximum outside diameter that draws is less than pin key bore dia 2mm.
Utility model has the advantages that
The horizontal position that built-in fitting is limited using correction mechanism, pours the concrete curing of landing beam to prescribed strength
Afterwards, then by the hoisting prefabricated stair of tower crane, stair pin key hole is passed through using pilot hole mechanism and entangles the positioning of built-in fitting pilot hole, reaches pre-
The accurate splicing of stair processed and cast-in-place landing beam built-in fitting, it is ensured that be reliably connected.
Correction mechanism limits the spacing of two sleeves using cross bar, quickly corrects the horizontal position of two pre-embedded bolts, improves
Working efficiency；It is provided on cross bar to middle graticule, the position system of upper and lower built-in fitting can be reached quickly with understructure centering
One.
Pilot hole mechanism use with the skirts of built-in fitting diameter matches and with precast stair pin key bore dia is matched draws ball group
The form of conjunction can be such that pre-embedded bolt is centered in pin key hole while realizing pilot hole, accelerate lifting speed, improve installation
Precision.
Since the size of casing, skirt is slightly larger than the size of pre-embedded bolt, draws ball and be slightly less than pin key pore size, so water
Flat error is small, and is easy to extract correction mechanism and pilot hole mechanism.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of correction mechanism and built-in fitting in the utility model；
When Fig. 2 is that the utility model precast stair assembles, the supplementary structure schematic diagram of pilot hole mechanism；
Fig. 3 is the structural schematic diagram in Fig. 2 after precast stair assembly in place；
Fig. 4 is the structural schematic diagram for extracting the pilot hole mechanism in Fig. 2.
Specific embodiment
To make the structure feature to the utility model and the effect of being reached has a better understanding and awareness, to compared with
Good examples and drawings cooperate detailed description, are described as follows:
As shown in Figure 1 and Figure 2, a kind of precast stair accurate assembly accessory part, it is pre-buried in structural beams 5 including being embedded in
Part 1, is aligned with built-in fitting 1 for the pin key hole 41 in precast stair 4 correction mechanism 2 for correcting 1 position of built-in fitting
Pilot hole mechanism 3；
Built-in fitting 1 is two bolts being embedded in structural beams 5.
Correction mechanism 2 includes that cross bar 21 and 21 both ends of cross bar are fixed with towards consistent sleeve 22；Sleeve 22 and cross bar
21 is vertical；The axis spacing of two sleeves 22 is two screw axis spacing；22 internal diameter of sleeve is slightly larger than the diameter of bolt, general sleeve
22 internal diameters are greater than diameter of bolt 2mm.The middle position of cross bar 21 be provided with lower layer be completed structure middle line centering to acceptance of the bid
Line 23.
Pilot hole mechanism 3 includes drawing ball 31, skirt 32；Draw ball 31 to be set on skirt 32；Draw ball 31 away from 32 bottom end of skirt
Height is less than the length of built-in fitting 1；The maximum outside diameter for drawing ball 31 is slightly less than 41 diameter of pin key hole, general small 2mm.In skirt 32
Diameter is slightly larger than 1 diameter of built-in fitting.32 internal diameter of skirt is greater than diameter of bolt 2mm.
Since precast stair has certain thickness, if drawing the insufficient height of ball 31, bolt portion hanging in pin key hole
Divide it is possible that shaking, so according to the actual situation, can determine that the number for drawing ball 31 or increase draw the height of ball 31.
Draw ball 31 to be set on skirt 32, for fixation, can be fixed by welding enhancing.Alternatively, it is also possible to draw
Skirt 31 is respectively welded in the upper and lower ends of ball 31, as long as upper and lower skirt 32 and to draw 31 three of ball coaxial.
Key points for operation:
1. cast-in-place landing beam built-in fitting 1 is embedded
Cast-in-place structural applies man-hour requirement upper and lower each pre-buried 2 built-in fittings 1 of bench at structural beams 5 at the stair.By built-in fitting
1 steel plate is welded on the Reinforcement of bolt beams of concrete, it is ensured that in concrete placings, the position of built-in fitting 1 is not shifted, and is protected
Demonstrate,prove the accuracy of 1 spacing of accuracy and built-in fitting of length in reserve.
It is fixed using correction mechanism 2 to improve bolt embedment horizontal accuracy, as shown in Figure 1, and passing through verification review.
After bolt embedment, each stair respectively use 12 fixing bolt of correction mechanism up and down, and through 21 centering graticule 23 of cross bar under
Layer is completed structure middle line and is finely adjusted.Since positioning sleeve shank diameter is merely greater than pre-embedded bolt diameter 2mm, ensure that pre-buried
Bolt relative level deviation is less than 1mm.Correction mechanism 2 is removed after concrete final set, is reused.
2. cast-in-place structural concreting
The cast-in-place landing beam of stair pour smash before using level carry out absolutely, relative elevation control, guarantee demoulding after absolute altitude
Control errors are repaired at deficiency using with grade cement mortar within 3mm, beyond at absolute altitude, carry out picking chisel equating.
Template should be checked before concreting, whether bolt, 1 position of built-in fitting meet code requirement, such as find built-in fitting 1
It is displaced in concrete casting, should stop pouring, reason when looking into is dealt carefully with, and pays attention to having to before concrete coagulation
Built-in fitting 1 is retightened.In concrete casting, poker vibrator is generally used, bolt should be avoided collision as far as possible, forbid to shake
Tamper is directly contacted with built-in fitting 1.After concrete is poured, it should be noted that reinforce maintenance, keep moistening around built-in fitting 1, prevent
Only shrinkage deformation causes hollowing in built-in fitting 1.
3. precast stair 4 installs preceding finishing, surveying setting-out
Before hoisting prefabricated stair 4, corresponding staircase component end and side are measured and popped up in predetermined installation site
Control line, and installation control line, landing beam absolute altitude are checked.20 thickness 1:1 cement mortar are laid on the ladder beam of gangboard both ends
Screed-coat 6 (strength grade >=M15), the absolute altitude of screed-coat 6 answers precise control.
4. stair handling is installed
Tower crane must carry out examination and hang before formally lifting, first sling stopping when away from ground 500mm, check wirerope, suspension hook
Stress condition is measured, and adjust stair step to horizontality by hoist after inspection is intact using horizontal ruler.
It is hung at the about 300mm of work layer overhead in tower crane and slightly pauses, the hand steered staircase boards adjustment direction of construction personnel, by building
The sideline of gangboard is aligned with the installation control line on terraced beam, is each passed through stair pin key hole 41 using 4 pilot hole mechanisms 3, is such as schemed
Shown in 3, the positioning of pre-embedded bolt pilot hole is entangled, is slowly declined, it is accurate in place.It is not allowed to lead to prefabricated building in place when avoiding no casing
Ladder 4 damages bolt by pressure, accelerates lifting speed and precision.
The slow play 5. gangboard will come to a complete stop when shelving is forbidden quickly to put suddenly, causes gangboard clashing and breaking to avoid impact force is excessive.To ladder
It is finely tuned again with crowbar after plate is basic in place, until installation site and absolute altitude are correct, shelve and completely attached at face.
6. after precast stair 4 is installed in place, extraction pilot hole mechanism 3 is that implementable grouting pours, as shown in Figure 4.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only the principles of the present invention, the utility model also has respectively on the premise of not departing from the spirit and scope of the utility model
Kind changes and improvements, these changes and improvements are both fallen in the range of claimed invention.The requires of the utility model
Protection scope defined by appended claims and its equivalent.
Claims (5)
1. a kind of precast stair accurate assembly accessory part, it is characterised in that: including be embedded in structural beams built-in fitting, be used for
The correction mechanism for correcting built-in fitting position, the pilot hole mechanism being aligned for the pin key hole in precast stair with built-in fitting；It is described pre-
Embedded part is two bolts being embedded in structural beams；The correction mechanism includes that cross bar and cross bar both ends are fixed with towards consistent
Sleeve；The sleeve is vertical with cross bar；The axis spacing of two sleeves is two screw axis spacing；The sleeve diameter
Slightly larger than the diameter of bolt；The pilot hole mechanism includes drawing ball, skirt；The ball cover that draws is located on skirt；The ball that draws is away from skirt
The height of bottom end is less than the length of built-in fitting；The maximum outside diameter for drawing ball is slightly less than pin key bore dia；The skirt internal diameter omits
Greater than built-in fitting diameter.
2. a kind of precast stair accurate assembly accessory part according to claim 1, it is characterised in that: in the cross bar
Meta position installs the centering graticule for being equipped with and structure middle line centering being completed with lower layer.
3. a kind of precast stair accurate assembly accessory part according to claim 1, it is characterised in that: the sleeve diameter
Greater than diameter of bolt 2mm.
4. a kind of precast stair accurate assembly accessory part according to claim 1, it is characterised in that: the skirt internal diameter
Greater than diameter of bolt 2mm.
5. a kind of precast stair accurate assembly accessory part according to claim 1, it is characterised in that: described to draw ball maximum
Outer diameter is less than pin key bore dia 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820743490.8U CN208310140U (en) | 2018-05-17 | 2018-05-17 | A kind of precast stair accurate assembly accessory part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820743490.8U CN208310140U (en) | 2018-05-17 | 2018-05-17 | A kind of precast stair accurate assembly accessory part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208310140U true CN208310140U (en) | 2019-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820743490.8U Active CN208310140U (en) | 2018-05-17 | 2018-05-17 | A kind of precast stair accurate assembly accessory part |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111576639A (en) * | 2020-05-08 | 2020-08-25 | 中国一冶集团有限公司 | Fixing and positioning device for embedded bolts of prefabricated stairs and construction method |
| CN112095829A (en) * | 2020-09-12 | 2020-12-18 | 北京市第三建筑工程有限公司 | Method for quickly mounting tensile vibration isolator |
| CN112412067A (en) * | 2020-11-19 | 2021-02-26 | 中冶建工集团有限公司 | Accurate positioning method for prefabricated staircase |
| CN112412068A (en) * | 2020-11-19 | 2021-02-26 | 中冶建工集团有限公司 | Accurate positioning and assembling method for prefabricated staircase |
| CN112411766A (en) * | 2020-11-26 | 2021-02-26 | 上海宝冶集团有限公司 | Construction method of upper and lower end connecting node of prefabricated staircase |
| CN113585769A (en) * | 2021-08-27 | 2021-11-02 | 中建三局集团有限公司 | Method for installing closed space of assembled bare concrete horizontal component |
| CN113944337A (en) * | 2021-10-29 | 2022-01-18 | 上海宝冶集团有限公司 | Prefabricated wall installation elevation control method |
-
2018
- 2018-05-17 CN CN201820743490.8U patent/CN208310140U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111576639A (en) * | 2020-05-08 | 2020-08-25 | 中国一冶集团有限公司 | Fixing and positioning device for embedded bolts of prefabricated stairs and construction method |
| CN112095829A (en) * | 2020-09-12 | 2020-12-18 | 北京市第三建筑工程有限公司 | Method for quickly mounting tensile vibration isolator |
| CN112412067A (en) * | 2020-11-19 | 2021-02-26 | 中冶建工集团有限公司 | Accurate positioning method for prefabricated staircase |
| CN112412068A (en) * | 2020-11-19 | 2021-02-26 | 中冶建工集团有限公司 | Accurate positioning and assembling method for prefabricated staircase |
| CN112412067B (en) * | 2020-11-19 | 2022-03-18 | 中冶建工集团有限公司 | Accurate positioning method for prefabricated staircase |
| CN112411766A (en) * | 2020-11-26 | 2021-02-26 | 上海宝冶集团有限公司 | Construction method of upper and lower end connecting node of prefabricated staircase |
| CN113585769A (en) * | 2021-08-27 | 2021-11-02 | 中建三局集团有限公司 | Method for installing closed space of assembled bare concrete horizontal component |
| CN113944337A (en) * | 2021-10-29 | 2022-01-18 | 上海宝冶集团有限公司 | Prefabricated wall installation elevation control method |
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