CN109823964B - Prefabricated stair hoisting connection structure and hoisting method - Google Patents
Prefabricated stair hoisting connection structure and hoisting method Download PDFInfo
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- CN109823964B CN109823964B CN201910098906.4A CN201910098906A CN109823964B CN 109823964 B CN109823964 B CN 109823964B CN 201910098906 A CN201910098906 A CN 201910098906A CN 109823964 B CN109823964 B CN 109823964B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract 1
- 230000001788 irregular Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a connecting structure for hoisting a prefabricated staircase and a hoisting method, wherein the connecting structure comprises the prefabricated staircase, a connecting piece, a manual hoist and a crane, sleeves are pre-embedded in at least two steps at the near two ends of the prefabricated staircase, four sleeves form hoisting fulcra, the connecting piece comprises a D-shaped shackle and L-shaped angle steel, the L-shaped angle steel is used for connecting the sleeve of the prefabricated staircase and the D-shaped shackle, and a steel wire rope sleeve rope on the crane passes through the D-shaped shackle of each fulcra to hoist. The connecting piece with a limited structure is adopted, so that the connecting piece has the advantages of simple and easily obtained raw materials, simple structure, economy, scientific overall stress, less rigid constraint, uniform angle steel and shackle materials, high strength, greatly reduced stress concentration phenomenon, safety, reliability and strong operability; the hoisting is more stable, safer and more convenient, and the operability is improved.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a prefabricated stair hoisting connection structure and a hoisting method, wherein the prefabricated stair hoisting connection structure is simple in structure, convenient to manufacture and high in operability.
Background
The assembled concrete structure is the industrial development direction of the building in China in recent years, and the assembled building needs to use a plurality of prefabricated components. For example, in the project construction period, the supply of prefabricated components is insufficient, the production progress of manufacturers is seriously delayed, the project construction period is extremely short, and the hoisting speed of stairs is required to be increased. The traditional hoisting operation mostly adopts the forms of single-double loop threading and hanging basket knot rope method or section steel balance beam, the structure of the lifting appliance is complex, the prefabricated stairway is irregular in form in the limited space after the building structure is basically completed, the hoisting points are difficult to fix, the hoisting operability is poor, the large-batch stairway hoisting is very inconvenient, and the progress is slow.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide the prefabricated stair hoisting connecting structure and the hoisting method for hoisting the prefabricated stair, which have the advantages of simple structure, convenient manufacture and strong operability.
A prefabricated staircase hoist and mount connection structure, including prefabricated staircase, connecting piece, hand hoist and loop wheel machine, pre-buried sleeve that sets up in at least two steps of the nearly both ends of prefabricated staircase, evenly distributed constitutes hoist fulcrum at four at least sleeves in prefabricated staircase four corners, the connecting piece includes D type shackle and L shape angle steel, open threaded hole respectively on two connecting plates of L shape angle steel, one of them connecting plate is by threaded hole back and telescopic internal thread matching connection, D type shackle passes through threaded hole swing joint on another connecting plate by the bolt, D type shackle that every fulcrum was passed to wire rope lasso on the loop wheel machine, hoist prefabricated staircase, hand hoist sets up on two wire ropes of prefabricated staircase same one end for adjust prefabricated staircase height.
The prefabricated staircase hoisting connection structure is characterized in that convex rings are arranged outside the sleeve at intervals.
The prefabricated staircase hoisting connection structure is characterized in that at least one through hole is formed in the wall of the lower end part of the sleeve, and reinforcing steel bars are arranged on the through hole in a penetrating mode.
A prefabricated staircase hoist and mount connection structure, its characterized in that L shape angle steel both sides welding respectively set up the extension board, the extension board sets up at two connecting plate borders for connect two connecting plates and consolidate.
The prefabricated staircase hoisting connection structure is characterized in that the distance between the sleeve and the outer edge of the prefabricated staircase is 10-20cm.
The prefabricated staircase hoisting connection structure is characterized in that L-shaped angle steel is manufactured by adopting L200 multiplied by 20Q 235 angle steel.
The prefabricated staircase hoisting method is characterized by comprising the following steps of:
1) The method comprises the steps of manufacturing a prefabricated staircase, placing a sleeve at a set position in a prefabricated staircase reinforcement cage, fixing, inserting reinforcing steel bars into through holes in the bottom of the sleeve, fixing the two ends of the reinforcing steel bars on the reinforcement cage, and pouring concrete to obtain the prefabricated staircase;
2) After the house structure is basically completed, carrying prefabricated stairways, D-shaped shackles, L-shaped angle steels, manual hoist and the like to a construction site;
3) Fixing a connecting plate of the L-shaped angle steel on a sleeve through a bolt, fixing a D-shaped shackle on the other connecting plate of the L-shaped angle steel through a bolt, installing a steel wire rope sleeve on a connecting piece of the corresponding four sleeves of the prefabricated staircase, installing a manual hoist on two steel wire ropes at one end of the prefabricated staircase, and finally lifting the steel wire ropes by a crane to hoist the prefabricated staircase, so that the prefabricated staircase is ensured to be in a horizontal state;
4) After the prefabricated stairway is hung to a house structure, operating a manual hoist to enable an included angle between the prefabricated stairway and the ground to be 48 degrees;
5) After the prefabricated stairway enters the house structure, the angle between the prefabricated stairway and the ground is 31 degrees through operating the manual hoist, the angle is matched with the installation angle of the stairway, and the prefabricated stairway is put down, so that the hoisting of the prefabricated stairway is completed;
6) After the prefabricated stairs are fixed, the connecting piece is disassembled, and the sleeve is filled with concrete.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
1) According to the invention, the sleeve with a limited structure is pre-embedded in the prefabricated staircase, and the reinforcing steel bars are arranged at the bottom of the sleeve, so that the connection and fixation during the hoisting of the prefabricated staircase with irregular shape are facilitated, and the operability is improved;
2) The connecting piece with a limited structure is used for connecting the crane and the prefabricated staircase during hoisting, the connecting piece adopts the D-shaped shackle to be matched and connected with the L-shaped angle steel, the D-shaped shackle can swing freely relative to the L-shaped angle steel during hoisting, and the L-shaped angle steel is directly obtained by adopting on-site angle steel residual materials through simple cutting processing, so that the invention is quite economical; the L-shaped angle steel is matched with the right-angle tread of the stair, the contact area is large enough, the tread is not easy to damage, the whole stress is scientific, the rigidity constraint is less, the angle steel and shackle materials are uniform and high in strength, the stress concentration phenomenon can be greatly reduced, and the stair tread is safe, reliable and high in operability;
3) According to the invention, after the prefabricated stairway is hoisted, in order to avoid quality problems caused by collision between the prefabricated stairway and a house structure, the angle of the prefabricated stairway is effectively adjusted to be 0-48-31 degrees in sequence according to the inclination of the stairway, and angle adjustment and control are realized through the manual hoist, so that the hoisting is more stable, safer and more convenient, and the operability is improved.
Drawings
FIG. 1 is a schematic view of a hoisting connection structure according to the present invention;
FIG. 2 is a schematic view of another angle structure of the hoisting connection structure of the present invention;
fig. 3 is an enlarged view at a in fig. 2.
In the figure: 1-prefabricated stairway, 2-connecting piece, 21-D type shackle, 22-L-shaped angle steel, 3-hand hoist, 4-sleeve, 5-wire rope lasso, 6-reinforcing steel bar and 7-support plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings, but the scope of protection of the invention is not limited thereto:
as shown in figures 1-3, the connecting structure for hoisting the prefabricated staircase comprises the prefabricated staircase 1, a connecting piece 2, a manual hoist 3 and a crane, wherein sleeves 4 are pre-embedded in at least two steps at the near two ends of the prefabricated staircase 1, at least four sleeves 4 uniformly distributed at four corners of the prefabricated staircase 1 form hoisting fulcra, the connecting piece 2 comprises a D-shaped shackle 21 and an L-shaped angle steel 22, threaded holes are respectively formed in two connecting plates of the L-shaped angle steel 22, one connecting plate is in matched connection with the internal threads of the sleeves 4 after passing through the threaded holes through bolts, the D-shaped shackle 21 is movably connected to the other connecting plate through the threaded holes through bolts, a steel wire rope lasso 5 on the crane passes through the D-shaped shackle 21 of each fulcra, and the manual hoist 3 is arranged on two steel wire ropes at the same end of the prefabricated staircase and used for adjusting the height of the prefabricated staircase.
In order to improve the bearing capacity of the sleeve 4, convex rings are arranged at intervals outside the sleeve 4, the biting force of the convex rings and concrete is improved, at least one through hole is formed in the wall of the lower end part of the sleeve 4, steel bars 6 are arranged on the through holes in a penetrating mode and used for reinforcing the sleeve 4, and the distance between the sleeve 4 and the outer edge of a prefabricated staircase is 10-20cm.
The bolt adopts a 12.9-grade M20 bolt, the shearing strength is more than 300Mpa, and the tensile strength accords with the national standard of mechanical property bolt, screw and stud of fastening piece GB/T3098.1-2010.
As shown in the figure, the L-shaped angle steel 22 is manufactured by adopting the Q235 angle steel of 200 multiplied by 20, the strength is enough, the materials and the properties are stable and uniform, the two sides of the L-shaped angle steel 22 are respectively welded with the support plates 7, and the support plates 7 are arranged at the edges of two connecting plates and are used for connecting the two connecting plates and reinforcing.
As shown in the figure, the prefabricated staircase hoisting method comprises the following steps:
1) The manufacturing of the prefabricated staircase 1 comprises the steps of placing a sleeve 4 at a set position in a prefabricated staircase reinforcement cage and fixing, inserting reinforcing steel bars into through holes at the bottom of the sleeve 4, fixing the reinforcement cage at two ends of the reinforcing steel bars, and pouring concrete to obtain the prefabricated staircase 1;
2) After the house structure is basically completed, carrying the prefabricated staircase 1, the D-shaped shackle 21, the L-shaped angle steel 22, the hand hoist 3 and the like to a construction site;
3) Fixing a connecting plate of the L-shaped angle steel 22 on the sleeve 4 through a bolt, fixing a D-shaped shackle 21 on another connecting plate of the L-shaped angle steel 22 through a bolt, installing steel wire rope sleeves on connecting pieces 2 of the corresponding four sleeves 4 of the prefabricated staircase 1, installing a manual hoist 3 on two steel wires at one end of the prefabricated staircase 1, and finally lifting the steel wires by a crane to hoist the prefabricated staircase 1, so that the prefabricated staircase 1 is ensured to be in a horizontal state;
4) After the prefabricated staircase 1 is hung to a house structure, the angle between the prefabricated staircase 1 and the ground is 48 degrees by operating the hand hoist 3;
5) After the prefabricated staircase 1 enters a house structure, the angle between the prefabricated staircase 1 and the ground is 31 degrees through operating the manual hoist 3, the angle is matched with the installation angle of the staircase, and the prefabricated staircase 1 is put down, so that the hoisting of the prefabricated staircase 1 is completed;
6) After the prefabricated staircase 1 is fixed, the connecting piece 2 is disassembled, and the sleeve 4 is filled with concrete.
Claims (6)
1. A prefabricated stair hoisting method is based on a prefabricated stair hoisting connection structure and comprises a prefabricated stair (1), a connecting piece (2), a hand hoist (3) and a crane, wherein sleeves (4) are pre-buried in at least two steps at the near two ends of the prefabricated stair (1), at least four sleeves (4) uniformly distributed at the four corners of the prefabricated stair (1) form hoisting fulcra, the connecting piece (2) comprises a D-shaped shackle (21) and an L-shaped angle steel (22), threaded holes are respectively formed in two connecting plates of the L-shaped angle steel (22), one connecting plate is connected with the internal threads of the sleeve (4) in a matching mode after passing through the threaded holes through bolts, the D-shaped shackle (21) is movably connected to the other connecting plate through the threaded holes through bolts, a steel wire rope lasso (5) on the crane passes through the D-shaped shackle (21) of each fulcra, and the hand hoist (3) is arranged on two steel wires at the same end of the prefabricated stair for adjusting the height of the prefabricated stair, and the prefabricated stair hoisting method is characterized by comprising the following steps:
1) The manufacturing of the prefabricated staircase (1) comprises the steps of placing a sleeve (4) at a set position in a prefabricated staircase reinforcement cage and fixing, inserting reinforcing steel bars into through holes at the bottom of the sleeve (4), fixing the reinforcement cage at two ends of the reinforcing steel bars, and pouring concrete to obtain the prefabricated staircase (1);
2) After the house structure is basically completed, carrying the prefabricated staircase (1), the D-shaped shackle (21), the L-shaped angle steel (22), the hand hoist (3) and the like to a construction site;
3) Fixing a connecting plate of the L-shaped angle steel (22) on the sleeve (4) through a bolt, fixing a D-shaped shackle (21) on the other connecting plate of the L-shaped angle steel (22) through a bolt, installing a steel wire rope sleeve on a connecting piece (2) of the corresponding four sleeves (4) of the prefabricated staircase (1), installing a manual hoist (3) on two steel wires at one end of the prefabricated staircase (1), and finally lifting the steel wires by a crane to hoist the prefabricated staircase (1) so as to ensure that the prefabricated staircase (1) is in a horizontal state;
4) After the prefabricated staircase (1) is hung to a house structure, the angle between the prefabricated staircase (1) and the ground is 48 degrees by operating the manual hoist (3);
5) After the prefabricated staircase (1) enters a house structure, operating the hand hoist (3) to enable the included angle between the prefabricated staircase (1) and the ground to be 31 degrees, matching with the installation angle of the staircase, and putting down the prefabricated staircase (1) to finish hoisting of the prefabricated staircase (1);
6) After the prefabricated staircase (1) is fixed, the connecting piece (2) is disassembled, and the sleeve (4) is filled with concrete.
2. The method for hoisting the prefabricated staircase according to claim 1, characterized in that the sleeve (4) is provided with convex rings at intervals outside.
3. The method for hoisting the prefabricated staircase according to claim 1, characterized in that the lower end wall of the sleeve (4) is provided with at least one through hole, and the through hole is provided with a reinforcing steel bar (6) in a penetrating way.
4. A method for hoisting a prefabricated staircase according to any one of claims 1-3, characterized in that the two sides of the L-shaped angle steel (22) are respectively welded with a support plate (7), the support plates (7) being arranged at the edges of two connecting plates for connecting the two connecting plates and reinforcing.
5. A method of hoisting a prefabricated staircase according to any of claims 1-3, characterized in that the distance between the sleeve (4) and the outer edge of the prefabricated staircase is 10-20cm.
6. A method of hoisting a prefabricated staircase according to any of the claims 1-3, characterized in that the L-shaped angle steel (22) is made of L200 x 20Q 235 angle steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910098906.4A CN109823964B (en) | 2019-01-31 | 2019-01-31 | Prefabricated stair hoisting connection structure and hoisting method |
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| CN201910098906.4A CN109823964B (en) | 2019-01-31 | 2019-01-31 | Prefabricated stair hoisting connection structure and hoisting method |
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| CN109823964B true CN109823964B (en) | 2024-01-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110386541A (en) * | 2019-07-02 | 2019-10-29 | 中国建筑第四工程局有限公司 | A kind of precast stair hanging apparatus |
| CN112320611B (en) * | 2020-11-30 | 2023-07-25 | 中建一局集团建设发展有限公司 | Overweight assembled prefabricated stair hoisting device and construction method |
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2019
- 2019-01-31 CN CN201910098906.4A patent/CN109823964B/en active Active
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