CN201362953Y - Construction platform for pouring concrete silo roof - Google Patents

Abstract

The utility model discloses a construction platform for pouring concrete silo roofs, which comprises a central cylinder (2), several steel trusses (4), several groups of embedded parts arranged on the inner peripheral surface of the cylinder wall (1) and several groups of reinforcements Stay cable (14), each group of embedded parts includes an upper embedded steel part (12) and a lower embedded steel part (13), and the lower embedded steel part (13) is welded with steel corbel (17), steel The truss is provided with a truss support gusset plate (15) for close welding with the steel corbel (17), and one end of the reinforcement cable (14) is provided with a cable upper node welded with the upper embedded steel part (12) plate (16a), the other end of the reinforcement cable (14) is provided with a cable lower gusset plate (16b) welded to the node of the upper chord (4.1). The construction platform for pouring the concrete silo roof can simplify the construction process of the silo roof, improve the construction efficiency, reduce the construction intensity, shorten the construction period, save construction materials, and eliminate potential safety hazards.

Description

Construction platform for pouring concrete silo roof

technical field

The utility model relates to a construction facility in civil engineering, in particular to a construction platform for pouring concrete (round) silo roofs.

Background technique

Because the concrete structure is economical, practical, easy to obtain materials, and has good moisture-proof and electrical damage-proof effects, the concrete silo structure is often used in the storage of grain and other granular items. Generally, the diameter of the silo is between 10m and 20m, the height is between 30m and 50m, and the wall thickness of the cylinder is not less than 20cm.

In order to ensure the construction quality and progress of this special high-rise structure, the existing technology mostly adopts relatively mature slip-form construction technology for the construction of the silo wall of the concrete silo. As shown in Fig. 1, its construction method is generally: in the middle of the concrete of the cylinder wall 101, a number of vertical support steel bars 108 with through-hole jacks 106 are arranged, and the jacks 106 and the hanging support mechanism 107 are connected together. Fixing, fix the inner and outer templates 105 and the spoke construction platform 103 composed of the central cylinder 102 and a number of steel trusses 104 radially distributed on the above-mentioned hanging support mechanism 107 . Construction personnel stand on the construction platform 103 and pour concrete into the space between the inner and outer formwork 105 bound with steel bars. After the strength of the concrete reaches the design requirements, the jack 106 is lifted by a certain range, so that through the hanging support mechanism 107 The inner and outer formwork 105 connected with the jack 106 and the construction platform 103 are lifted synchronously, then continue to bind steel bars between the inner and outer formwork 105, and then continue to pour concrete between the inner and outer formwork 105 at this height. The operation is repeated many times until the concrete is poured to the designed height of the cylinder wall 101 .

After the concrete pouring of the tube wall is completed, the conventional construction method for the roof (including the roof body and the roof beam) of the concrete silo is generally as follows: first, the decomposed and disassembled jack 106, the inner and outer formwork 105, the hanging support The mechanism 107 and the construction platform 103 are hoisted from the top of the silo by a tower crane, and then the full fastener-type steel pipe support and support members are erected in the silo from the ground to the top, and then the full fastener-type steel pipe support The roof formwork of the silo (including the formwork of the roof body and the formwork of the roof beam) and the formwork support member are installed above the bracket support member, then the steel bars are bound, and finally the roof concrete is poured. After the roof concrete pouring is completed and the concrete strength meets the design requirements, the roof formwork, formwork support members, steel pipe supports and support support members are disassembled from top to bottom, and all the dismantled materials are taken out from the door at the bottom of the silo.

The construction platform of the pouring concrete silo roof in the prior art has the following defects: since the construction platform is fixed on the hanging support mechanism, it can only be used for the slipform construction of the wall of the concrete silo, but not for the construction of the concrete silo. Construction of the roof of a concrete silo. In the existing technology for the construction of the roof of the concrete silo, the height of the silo is generally more than 30m, and the steel pipes of the steel pipe bracket and the supporting member of the bracket in the silo must be closely spaced and the number must be large, so a large number of steel pipes and steel pipes must be occupied. For fasteners and other materials, the material consumption is large, the material cost is high, and the construction process is complicated, the construction difficulty is high, the labor intensity of the construction personnel is high, the construction efficiency is low, the construction period is long, and the labor cost is high; 30m, the steel pipe is too long vertically, and it is easy to lose stability, so there is a potential safety hazard.

Utility model content

The technical problem to be solved by the utility model is to provide a construction platform for pouring concrete silo roofs that can simplify the construction process of silo roofs, improve construction efficiency, reduce construction strength, shorten construction periods, save construction materials, and eliminate potential safety hazards .

The technical solution of the utility model is to provide a construction platform for pouring concrete silo roofs with the following structure, which includes a central tube, a number of steel trusses distributed radially, and a number of groups arranged on the inner circumference of the silo wall Embedded parts on the surface and several groups of reinforcement cables, each group of embedded parts includes an upper embedded steel part and a lower embedded steel part, and the lower embedded steel part is welded with steel corbels, The steel truss is provided with a truss support gusset plate for close welding with the steel corbel, and one end of the reinforcement cable is provided with an upper gusset plate for welding with the upper pre-embedded steel parts. The other end of the reinforcement cables is provided with a lower gusset plate for welding of the nodes with the upper chord of the steel truss.

After adopting the above structure, compared with the prior art, the construction platform of the utility model pouring concrete silo roof has the following advantages:

The utility model can directly adopt the construction platform for the construction of the concrete silo roof as the construction platform for the roof construction, and the construction platform is generally fixed at a height of 2.5m to 3.5m from the top of the silo wall. There is no need to erect full-hole fastener-type steel pipe brackets and bracket support members with a height of more than 30m from the bottom to the top of the silo floor, and after the pouring is completed, it is only necessary to remove the steel pipe brackets with a height of about 3m on the construction platform. Then lower the construction platform to the bottom of the silo and disassemble it. Therefore, it not only saves a lot of construction materials such as steel pipes and fasteners, greatly reduces the cost of materials, but also greatly simplifies the construction process and greatly improves the construction efficiency. The difficulty of construction, the labor intensity and labor cost of construction personnel are greatly reduced, and the construction period is greatly reduced; and because the vertical steel pipe of the steel pipe support is only about 3m, there is no problem of instability and potential safety hazards are eliminated.

As an improvement, the distance between the node on the upper chord used for welding with the lower gusset plate of the cable and the central cylinder is equal to one-third of the length of the upper chord, which effectively improves the bearing capacity of the upper chord and makes the upper chord difficult to bend .

Description of drawings

Fig. 1 is the structural representation of the construction platform of the wall of pouring concrete silo and the whole set of sliding form tools of the prior art (it has been described in conjunction with the marks in the background technology, so Fig. 1 will not be described separately in the specific embodiment).

Fig. 2 is a reference diagram of the state when the construction platform of the pouring concrete silo roof of the utility model descends from the top of the cylinder wall.

Fig. 3 is a state reference diagram when the construction platform of the pouring concrete silo roof of the utility model is installed on the silo wall.

Fig. 4 is a reference diagram of the state when the construction platform of the pouring concrete silo roof of the utility model descends from the cylinder wall to the cylinder bottom.

Fig. 5 is a top view structural schematic diagram of the construction platform for pouring the concrete silo roof of the utility model.

shown in the picture

Components of the prior art: 101, cylinder wall, 102, central cylinder, 103, construction platform, 104, steel truss, 105, inner and outer formwork, 106, jack, 107, hanging support mechanism, 108, supporting steel bar;

Components of the present utility model: 1. cylinder wall, 2. central cylinder, 3. operating rectangular hole, 4. steel truss, 4.1. upper chord, 5. inner and outer formwork, 6. jack, 7. hanging support mechanism , 8. Hoist, 9. Top plate, 10. Steel cable, 11. Through hole, 12. Upper embedded steel part, 13. Lower embedded steel part, 14. Reinforced cable, 15. Truss support gusset plate, 16a 1. The upper gusset plate of the drag cable, 16b, the lower gusset plate of the drag cable, 17, the steel corbel, 18, the pulley block, 19, the pulley block support mechanism, 20, the hoisting rope.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

As shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the construction platform of the utility model pouring concrete silo roof includes a central tube 2, a number of steel trusses 4 distributed radially in the spokes, and several groups of steel trusses arranged in the silo. Embedded parts on the inner peripheral surface of cylinder wall 1 and several groups of reinforcement cables 14 . Each set of embedded parts includes an upper embedded steel part 12 and a lower embedded steel part 13, and the upper embedded steel part 12 is located at a height of 0.3m to 0.5m lower than the top of the silo wall 1 , the lower embedded steel part 13 is located at a height of 2.5m-3.5m lower than the top of the silo wall 1 . The lower embedded steel part 13 is welded with a steel corbel 17, and the steel truss is provided with a truss support gusset plate 15 for close welding with the steel corbel 17, and one end of the reinforcement cable 14 There is an upper gusset plate 16a for welding with the upper embedded steel part 12, and the other end of the reinforcement cable 14 is provided with a lower gusset plate for welding with the node of the upper chord 4.1 of the steel truss 4 16b, the distance between this node and the central cylinder 2 is equal to one-third of the length of the upper chord 4.1. The number of groups of embedded parts is equal to the number of upper chords 4.1 of the steel truss 4 on the construction platform 103, and each group of embedded parts is evenly distributed along the inner circumference of the cylinder wall 1.

The specific steps of installing the construction platform for pouring the concrete silo roof of the utility model and using the construction platform to pour the concrete silo roof and dismounting the construction platform are as follows:

a. Multiple sets of embedded parts are installed on the cylinder wall 1 during the construction of the slip form;

b. Install a pulley block support mechanism 19 with a pulley block 18 on the top of the hanging support mechanism 7, and the construction personnel fix a plurality of hoists 8 on the hanging support mechanism 7, and connect one end of the hoisting rope 20 of the pulley block 18 to the hoist 8 connection, the other end of hoisting rope 20 is fixed on the construction platform 103;

c. Disassemble the connecting piece between the construction platform 103 and the hanging support mechanism 7 to separate the two;

d. The construction personnel stand on the construction basket and weld the steel corbel 17 to the lower embedded steel part 13. The number of steel corbels 17 is the same as the number of groups of embedded parts;

e. The construction personnel drive the hoisting rope 20 of the pulley block 18 with the winch 8, and vertically lower the construction platform 103, so that the truss support node plate 15 of the steel truss 4 of the construction platform 103 rests on the steel corbel 17;

f. Fix the construction platform 103 and the cylinder wall 1, that is, weld the truss support gusset plate 15 of each steel truss 4 of the construction platform 103 on the corresponding steel corbel 17, and reinforce the upper node of the drag cable at one end of the drag cable 14 The plate 16a is welded on the upper embedded steel part 12, and the lower gusset plate 16b of the other end of the reinforcement cable 14 is welded to the node of the upper chord 4.1 of the steel truss 4, and the distance between the node and the central cylinder 2 is equal to the upper chord 4.1 one-third of the length;

g. Lift the decomposed and disassembled hanging support mechanism 7, the pulley block support mechanism 19 with the pulley block 18, the jack 6, the inner and outer templates 5, and the hoist 8 from the top of the silo with a crane;

h. The fixed construction platform 103 is used as a special support platform, and steel pipe supports, support support members, roof formwork (including roof body formwork and roof beam formwork) and formwork support members are built from bottom to top on the construction platform 103. Bind the steel bars on the formwork and pre-embed the fixing parts for the winch 8;

i, pouring roof 9 (comprising roof body and roof beam) concrete and reserving a plurality of through holes 11 for steel cables 10 to pass and a short side length greater than the operating rectangular hole 3 of the diameter of central tube 2;

j. When the strength of the concrete on the roof 9 meets the design requirements, decompose and disassemble the roof formwork, formwork support members, steel pipe brackets and support support members built on the construction platform 103 from top to bottom, and remove the disassembled materials from the roof with a crane. 9 The reserved operating rectangular hole 3 is hoisted away;

k, install a plurality of winches 8 on the fixture of top plate 9, the steel cable 10 of winches 8 passes through hole 11 and fixes with construction platform 103;

1. The construction workers stand on the construction basket and use oxygen cutting to cut off the upper gusset plate 16a and the steel corbel 17 of the reinforcement cable 14, so that the construction platform 103 is separated from the cylinder wall 1;

m. Lower the construction platform 103 to the bottom of the silo with the hoist 8;

n, disassemble the construction platform 103, hoist the central tube 2 of the construction platform 103 from the operation rectangular hole 3 reserved on the top plate 9 with a crane and remove other materials after disassembly from the bottom of the silo;

o. Reinforce and pour the reserved through-hole 11 on the top plate 9 and the concrete for operating the rectangular hole 3 and remove the hoist 8 on the top plate 9 .

Claims (3)

1, a kind of operation platform of fluid concrete roof plate of silo, it comprises central tube (2) and some steel trusss (4) that is the radial distribution of spoke, it is characterized in that: it comprises that also built-in fitting on some barrel (1) inner peripheral surfaces that are mounted on silo and some groups reinforce drag-lines (14), described every group of built-in fitting comprises a last pre-buried steel part (12) and a following pre-buried steel part (13), described pre-buried steel part (13) down is welded with steel corbel (17), described steel truss is provided with the truss support node plate (15) that is used for being adjacent to steel corbel (17) welding, one end of described reinforcing drag-line (14) is provided with gusset plate (16a) on the drag-line that is used for last pre-buried steel part (12) welding, and the other end of described reinforcing drag-line (14) is provided with the drag-line lower node plate (16b) that is used for the node welding of the upper chord (4.1) of steel truss (4).

2, the operation platform of fluid concrete roof plate of silo according to claim 1, it is characterized in that: the described pre-buried steel part (12) of is positioned at the height that is lower than silo barrel (1) top 0.3m～0.5m, and described pre-buried steel part (13) down is positioned at the height that is lower than silo barrel (1) top 2.5m～3.5m.

3, the operation platform of fluid concrete roof plate of silo according to claim 1 and 2 is characterized in that: be used on the described upper chord (4.1) equaling 1/3rd of upper chord (4.1) length with the node of drag-line lower node plate (16b) welding and the distance of central tube (2).

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