CN215106001U - Large-span precast beam structure - Google Patents
Large-span precast beam structure Download PDFInfo
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- CN215106001U CN215106001U CN202120185828.4U CN202120185828U CN215106001U CN 215106001 U CN215106001 U CN 215106001U CN 202120185828 U CN202120185828 U CN 202120185828U CN 215106001 U CN215106001 U CN 215106001U
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- support rod
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Abstract
The utility model discloses a large-span precast beam structure, include two looks spaced cast-in-place walls and stride the precast beam of locating between two cast-in-place walls, two relative both sides of cast-in-place wall all are equipped with the cast-in-place gate, pre-buried vertical support rod in the diapire of cast-in-place gate, vertical support rod's top is stretched in cast-in-place mouth, horizontal support rod's both ends are all pre-buried has horizontal support pole in advance, horizontal support rod stretches out from the terminal surface of precast beam, horizontal support rod stretch out the end bearing on corresponding vertical support rod's top, be equipped with cast-in-place concrete in the cast-in-place gate, horizontal support rod's the top that stretches out end and vertical support rod all buries underground in cast-in-place concrete. The precast beam of the large-span precast beam structure is convenient to install, reliable to install and capable of reducing the construction cost.
Description
Technical Field
The utility model relates to a technical field who contains microscler bearing member's structure especially relates to a large-span precast beam structure.
Background
At present, with the vigorous development of assembly type building projects, the assembly type projects of large-scale guaranteed housing are gradually popularized and applied to commercial houses, the attractiveness of the building is improved due to the fact that the requirements of the commercial housing projects on building design and appearance modeling are high, when a structural tension beam with large span and height exceeding 20 meters is arranged, a scaffold cannot be erected at the position of the tension beam, operation platforms such as a climbing frame cannot be erected, or even though a Bailey frame is erected, the cost is high, the safety risk is high, construction is difficult, and therefore the structural beam is optimized into a fully prefabricated beam. The existing full precast beam is inconvenient to install and has large safety risk.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome the not enough of prior art, provide a precast beam simple to operate, installation reliable and can reduce the large-span precast beam structure who builds construction cost.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a large-span precast beam structure, includes two looks spaced cast-in-place walls and strides the precast beam who locates between two cast-in-place walls, two stifled the relative both sides of cast-in-place wall all are equipped with the cast-in-place gate, pre-buried vertical support rod in the diapire of cast-in-place gate, the top of vertical support rod stretches in the cast-in-place gate, horizontal supporting rod has all been pre-buried at the both ends of precast beam, horizontal supporting rod stretches out from the terminal surface of precast beam, the end support that stretches out of horizontal supporting rod is on the top of corresponding vertical support rod, be equipped with cast in-place concrete in the cast-in-place gate, the end that stretches out of horizontal supporting rod and the top of vertical support rod are all buried underground in cast in-place concrete.
As a further improvement of the above technical solution:
the length of the vertical support rod embedded in the cast-in-place wall is set as a, the length of the vertical support rod extending into the cast-in-place opening is set as b, and a is more than or equal to 2 b.
Said a >60cm and said b ═ 30 cm.
The length of the horizontal supporting rod buried in the precast beam is 60-90 cm, and the extending length of the horizontal supporting rod is 20 cm.
And the horizontal supporting rods are connected with the corresponding vertical supporting rods in a welding manner.
The vertical supporting rod and the horizontal supporting rod are made of I-shaped steel.
Transverse steel bars are embedded in the precast beams, and two ends of each transverse steel bar extend out of two ends of each precast beam and are embedded in corresponding cast-in-place concrete.
And a lifting appliance is arranged on the precast beam.
The cast-in-place wall is a right-angle wall, and the cast-in-place gate is a right-angle opening arranged at a corner at the top of the cast-in-place wall.
And a climbing frame is arranged below the precast beam of the cast-in-place wall.
Compared with the prior art, the utility model has the advantages of:
the utility model discloses a large-span precast beam structure, include two looks spaced cast-in-place walls and stride the precast beam of locating between two cast-in-place walls, two relative both sides of cast-in-place wall all are equipped with the cast-in-place gate, pre-buried vertical support rod that has in the diapire of cast-in-place gate, vertical support rod's top is stretched in cast-in-place mouth, horizontal support rod all pre-buried in the both ends of precast beam, horizontal support rod stretches out from the terminal surface of precast beam, horizontal support rod stretch out the end bearing on the top of corresponding vertical support rod, be equipped with cast-in-place concrete in the cast-in-place gate, horizontal support rod's the top that stretches out end and vertical support rod is all buried underground in cast-in-place concrete. The cast-in-place gates are arranged on the cast-in-place walls, the horizontal supporting rods at the two ends of the precast beam are supported on the vertical supporting rods extending into the cast-in-place gates on the two cast-in-place walls, and then the cast-in-place gates are filled with cast-in-place concrete, so that the cast-in-place walls and the precast beam are fixedly connected. The precast beam of the large-span precast beam structure is convenient to install, reliable to install and capable of reducing the construction cost.
Drawings
Fig. 1 is the structure schematic diagram is looked to the main of large-span precast beam structure of the utility model.
Fig. 2 is the utility model discloses the spatial structure schematic diagram of large-span precast beam structure in the work progress.
Fig. 3 is an enlarged view at a in fig. 2.
Fig. 4 is an enlarged view at B in fig. 2.
Fig. 5 is the utility model discloses the main structure sketch map of looking of large-span precast beam structure in the work progress.
The reference numerals in the figures denote:
1. casting a wall in situ; 2. prefabricating a beam; 21. transverse reinforcing steel bars; 3. carrying out pouring; 4. a vertical support bar; 5. a horizontal support bar; 6. casting concrete in situ; 7. a spreader; 8. climbing a frame; 9. and (5) plugging the steel wire mesh.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
Fig. 1 to 5 show the utility model discloses an embodiment of large-span precast beam structure, this large-span precast beam structure includes two looks spaced cast-in-place walls 1 and strides and locate two precast beams 2 between the cast-in-place wall 1, two relative both sides of cast-in-place wall 1 all are equipped with cast-in-place gate 3, pre-buried vertical support rod 4 in the diapire of cast-in-place gate 3, vertical support rod 4's top is stretched in cast-in-place mouth 3, horizontal support rod 5 all is pre-buried at the both ends of precast beam 2, horizontal support rod 5 stretches out from the terminal surface of precast beam 2, horizontal support rod 5 stretch out the end bearing on the top of corresponding vertical support rod 4, be equipped with cast-in-place concrete 6 in cast-in-place mouth 3, horizontal support rod 5 stretch out the end and vertical support rod 4's top all buries underground in cast-in-place concrete 6. The large-span precast beam structure is characterized in that a cast-in-place gate 3 is arranged on a cast-in-place wall 1, horizontal supporting rods 5 at two ends of a precast beam 2 are supported on vertical supporting rods 4 extending into the cast-in-place gate 3 on the two cast-in-place walls 1, and then the cast-in-place gate 3 is filled with cast-in-place concrete 6, so that the cast-in-place wall 1 and the precast beam 2 are fixedly connected. The precast beam 2 of the large-span precast beam structure is convenient to install, reliable to install and capable of reducing the construction cost.
In this embodiment, as shown in fig. 1, the length of the vertical support rod 4 embedded in the cast-in-place wall 1 is set as a, the length of the vertical support rod 4 extending into the cast-in-place port 3 is set as b, and a is greater than or equal to 2 b. and a is more than or equal to 2b, the supporting strength of the vertical supporting rod 4 is better, and the connecting strength between the cast-in-place wall 1 and the precast beam 2 is better. Preferably, a is >60cm and b is 30 cm.
In the embodiment, the length of the horizontal support rod 5 embedded in the precast beam 2 is 60-90 cm, and the extension length of the horizontal support rod 5 is 20 cm. At this time, the horizontal support bar 5 has a better shear strength, and the cast-in-place wall 1 and the precast girders 2 have a better connection strength therebetween.
In this embodiment, the horizontal support rod 5 is welded to the corresponding vertical support rod 4 to improve the connection strength between the two. Specifically, the vertical support rod 4 and the horizontal support rod 5 are both i-steel. As shown in fig. 1, 4 and 5, the horizontal support bar 5 is disposed in a forward direction and supported on the top end surface of the vertical support bar 4. The I-steel has high strength and good bending resistance, can support the structural weight of the precast beam 2, and does not need to set up other support systems.
In this embodiment, as shown in fig. 3 and 4, the precast girders 2 are embedded with transverse reinforcing bars 21, and both ends of the transverse reinforcing bars 21 extend from both ends of the precast girders 2 and are embedded in the corresponding cast-in-place concrete 6, respectively.
In this embodiment, as shown in fig. 1 and 2, the precast girders 2 are provided with spreaders 7. Specifically, the lifting device 7 is provided with at least two, and is arranged along the precast beam 2 at intervals, and the lifting device 7 is used for being connected with lifting equipment to hoist and mount the precast beam 2. Specifically, the lifting device 7 is a lifting nail screwed on the precast beam 2, so that the lifting nail can be conveniently dismounted after the precast beam 2 is installed.
In this embodiment, as shown in fig. 2, 3 and 4, the cast-in-place wall 1 is a right-angle wall, and the cast-in-place port 3 is a right-angle port formed at a corner of the top of the cast-in-place wall 1. The cast-in-place wall 1 is provided with a climbing frame 8 below the precast beam 2.
The installation and construction method comprises the following steps:
the precast beam 2 is precast in a component factory or a construction site; a part of node steel bar connecting area (cast-in-place gate 3) is reserved at the joint of the precast beam 2 and the cast-in-place wall 1 for secondary concrete casting, when the cast-in-place wall 1 is constructed, a blocking steel wire mesh 9 is used for blocking the cast-in-place gate 3, so that concrete is prevented from flowing into the cast-in-place gate 3 during casting, meanwhile, a vertical support rod 4 is pre-embedded, the depth of the concrete embedded in the cast-in-place wall 1 is larger than 60cm, the depth of the concrete extends out of the cast-in-place wall 1 and is about 30cm away from the cast-in-place wall 1 (the bottom surface of the cast-in-place gate 3), the concrete is effectively fixed, and the cast-in-place wall 1 is prevented from deviating and falling in the vibrating process. Before the precast beam 2 is installed, chiseling the plugging steel wire mesh 9 by using an electric hammer, washing a secondary concrete pouring junction surface by using water, adjusting the elevation of the vertical support rod 4, cutting off the junction surface by using a grinding wheel cutting machine, and ensuring that the top end of the vertical support rod 4 is smooth and the elevation of the precast beam 2 meets the design requirement; horizontal supporting rods 5 are embedded in hooping reinforcement areas at two ends of the precast beam 2, the embedding length is about 60-90 cm, and the length of each embedded supporting rod extends out of the end face of the beam by 20 cm. Hoisting the precast beam 2, overlapping the extending end of the horizontal supporting rod 5 with the top end of the vertical supporting rod 4 in the cast-in-place wall 1, welding the horizontal supporting rod 5 and the vertical supporting rod 4, wherein the height of a welding line is not less than 8mm, and the lifting appliance 7 can be unhooked after the welding is firm, so that the precast beam 2 is prevented from turning over and falling down, and quality safety accidents are avoided; because the number of steel bars in the joint steel bar connection area is large, the extending ends of part of transverse steel bars 21 in the precast beam 2 are bent during the structure splitting design, the installation difficulty is reduced, and the steel bars are prevented from being prized by brute force in the installation process; and erecting a template in the joint reinforcing steel bar connecting area, and pouring micro-expansion concrete to connect the precast beam 2 and the cast-in-situ wall 1 into a whole. In the installation process, workers can complete installation and fixation of the full precast beam 2 by standing on the conventional operation outer frame (such as the climbing frame 8), a large number of operation platforms do not need to be erected, high-altitude operation is avoided, potential safety hazards are reduced, meanwhile, the measure cost required for installation of the precast beam 2 is reduced, and the construction cost is reduced.
The installation and construction method is suitable for the conditions that a large-span beam, an operation platform for building a construction beam cannot be built, the cost for building the platform is too high, the difficulty of constructing the support structure of the precast beam 2 is high, and the like.
The precast beam 2 can be precast in a construction site and installed, and then the joint steel bar connecting area is integrally cast by micro-expansion concrete, so that the structure is safe and reliable, the installation is convenient, and an operation platform and a support system required by installation are not required to be erected.
The horizontal supporting rod 5 pre-buried in the precast beam 2 is I-shaped steel, and can also be replaced by other section steels such as channel steel, square steel, angle steel and the like, and the type of the horizontal supporting rod is required to meet the bending resistance requirement after the precast beam 2 is installed.
The vertical support rods 4 embedded in the cast-in-place wall 1 are I-shaped steel and can be replaced by channel steel, square steel, angle steel and other section steel, and the bending resistance requirement of the installed precast beam 2 is met by adopting the type.
The node steel bar connecting area adopts a plugging steel wire mesh 9 to intercept concrete poured on the cast-in-situ wall 1, the node steel bar connecting area is arranged at a position with small stress and is suitable for reserving steel bar anchoring length, the node steel bar connecting area adopts micro-expansion concrete to carry out secondary pouring, the precast beam 2 and the cast-in-situ wall 1 are connected into an integral structure, and the micro-expansion concrete can ensure the compactness of the node.
The joint steel bar connecting area adopts a plugging steel wire mesh 9 to intercept concrete poured into the cast-in-situ wall 1, and can also be plugged by other materials such as templates, battens, steel bars and the like, so that the concrete is ensured not to leak slurry. The cast-in-place wall 1 is provided with a window.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a large-span precast beam structure which characterized in that: the cast-in-place concrete pouring device comprises two spaced cast-in-place walls (1) and a precast beam (2) arranged between the two cast-in-place walls (1) in a spanning mode, wherein cast-in-place gates (3) are arranged on two opposite sides of the cast-in-place walls (1), vertical support rods (4) are pre-buried in the bottom wall of each cast-in-place gate (3), the top ends of the vertical support rods (4) extend into the cast-in-place gates (3), horizontal support rods (5) are pre-buried at two ends of each precast beam (2), the horizontal support rods (5) extend out from the end faces of the precast beams (2), the extending ends of the horizontal support rods (5) are supported at the top ends of the corresponding vertical support rods (4), cast-in-place concrete (6) is arranged in the cast-in-place gates (3), and the extending ends of the horizontal support rods (5) and the top ends of the vertical support rods (4) are buried in the cast-in-place concrete (6).
2. The large-span precast beam structure of claim 1, wherein: the length of the vertical support rod (4) embedded in the cast-in-place wall (1) is set as a, the length of the vertical support rod (4) extending into the cast-in-place gate (3) is set as b, and a is larger than or equal to 2 b.
3. The large-span precast beam structure of claim 2, wherein: said a >60cm and said b ═ 30 cm.
4. The large-span precast beam structure of claim 3, wherein: the length of the horizontal supporting rod (5) embedded in the precast beam (2) is 60-90 cm, and the extending length of the horizontal supporting rod (5) is 20 cm.
5. The large-span precast beam structure of claim 1, wherein: the horizontal supporting rod (5) is connected with the corresponding vertical supporting rod (4) in a welding mode.
6. The large-span precast beam structure of claim 1, wherein: the vertical supporting rod (4) and the horizontal supporting rod (5) are made of I-shaped steel.
7. The large-span precast beam structure of claim 1, wherein: transverse steel bars (21) are embedded in the precast beams (2), and two ends of each transverse steel bar (21) extend out of two ends of each precast beam (2) respectively and are embedded in corresponding cast-in-place concrete (6).
8. The large-span precast beam structure according to any one of claims 1 to 7, wherein: and a lifting appliance (7) is arranged on the precast beam (2).
9. The large-span precast beam structure according to any one of claims 1 to 7, wherein: the cast-in-place wall (1) is a right-angle wall, and the cast-in-place gate (3) is a right-angle opening arranged at a corner at the top of the cast-in-place wall (1).
10. The large-span precast beam structure of claim 9, wherein: the cast-in-place wall (1) is provided with a climbing frame (8) below the precast beam (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120185828.4U CN215106001U (en) | 2021-01-22 | 2021-01-22 | Large-span precast beam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120185828.4U CN215106001U (en) | 2021-01-22 | 2021-01-22 | Large-span precast beam structure |
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| Publication Number | Publication Date |
|---|---|
| CN215106001U true CN215106001U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120185828.4U Active CN215106001U (en) | 2021-01-22 | 2021-01-22 | Large-span precast beam structure |
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|---|---|
| CN (1) | CN215106001U (en) |
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2021
- 2021-01-22 CN CN202120185828.4U patent/CN215106001U/en active Active
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