CN117188760A - Upper suspension and lower bearing combined concrete formwork supporting structure and construction method - Google Patents
Upper suspension and lower bearing combined concrete formwork supporting structure and construction method Download PDFInfo
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- CN117188760A CN117188760A CN202311121225.8A CN202311121225A CN117188760A CN 117188760 A CN117188760 A CN 117188760A CN 202311121225 A CN202311121225 A CN 202311121225A CN 117188760 A CN117188760 A CN 117188760A
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- 238000009415 formwork Methods 0.000 title claims abstract description 98
- 238000010276 construction Methods 0.000 title claims abstract description 40
- 239000004567 concrete Substances 0.000 title claims abstract description 31
- 239000000725 suspension Substances 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 169
- 239000010959 steel Substances 0.000 claims abstract description 169
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims description 15
- 239000011150 reinforced concrete Substances 0.000 claims description 5
- 239000004035 construction material Substances 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Abstract
The invention discloses an upper-suspension lower-bearing combined concrete formwork support structure and a construction method. The invention has the beneficial effects that: the invention has good adaptability, the floor type frame body adopts 60 series disc buckles, and the bearing capacity of a single upright rod can be 9t; and compared with the construction method of building a steel structure platform layer by layer, the construction method has the advantages of mature construction process, high safety and relatively low cost.
Description
Technical Field
The invention relates to the technical field of formwork support construction, in particular to an upper suspension and lower bearing combined concrete formwork support structure and a construction method.
Background
With the development of materials such as high-strength concrete, high-strength steel, prestress, etc., the aesthetic requirements of building designers on building structural shapes become higher and are easier to realize. The concepts of 'air pavilion', 'suspension' and the like become reality gradually, a series of various building structures such as 'large-span overhanging structure', 'layer-by-layer overhanging structure', 'high-rise overhanging structure' and the like are formed, the effect diagram shows very well, and a large number of owners support is obtained.
1. The invention discloses an overhanging section steel formwork (application number: CN2015174757. X) for a high-altitude overhanging structure, which comprises an overhanging section steel beam with an I-shaped section, a concrete structural member, a formwork and a template, wherein the concrete structural member is in press fit with the bottom end of the overhanging section steel beam along the vertical direction, the overhanging section steel beam is provided with the formwork, and the template is paved between the formworks; the U-shaped bolt with the lower end embedded in the concrete member is further arranged in the concrete member and comprises a pressing plate, the pressing plate is provided with a threaded hole, the vertical top end of the U-shaped bolt penetrates through the threaded hole of the pressing plate and is respectively connected with a nut in a locking mode, the pressing plate is in abutting press fit with the top end of the cantilever steel beam along the vertical direction, original structural conditions and the bearing capacity of the section steel are fully utilized, the cantilever steel beam is installed on the lower layer of the high-altitude cantilever member in a cantilever outer frame mode, a steel pipe supporting frame and an installation template are erected on the cantilever steel beam, and the high-altitude cantilever reinforced concrete structure is constructed.
2. The patent discloses a high-altitude formwork support system (application number: CN201320405186. X) of an overlength cantilever truss structure, which comprises an upper frame body and a lower frame body, wherein the lower frame body comprises a profile steel cantilever beam, a lower supporting steel bracket, an upward-pulling steel wire rope and a lower truss, the upper frame body comprises a bearing support frame, an outer protection frame and an upper truss, one end of the profile steel cantilever beam is fixed at the top of the lower truss and extends out of the top of the lower truss, the bottom of the lower supporting steel bracket is fixed at the middle of the lower truss, the top of the lower supporting steel bracket is fixed at the bottom of the cantilever beam, the lower supporting steel bracket extends along the extending direction of the cantilever beam and inclines from bottom to top, the bottom of the steel wire rope is fixed at the top of the cantilever beam, the top of the upper truss is fixed at the bottom of the upper truss, the bottom of the upper truss is fixed at the bottom of the outer protection frame, and the outer protection frame is arranged outside the bearing support frame. The investment of turnover materials is reduced, the cost is saved, the setting time is reduced, and the utilization rate of machines and personnel in unit time is improved.
In the prior art, although some cantilever truss structures are arranged, the complex structure increases small construction difficulty for a construction party.
Therefore, it is necessary to provide an upper suspension and lower bearing combined concrete formwork support structure and a construction method for the same.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an upper suspension and lower bearing combined concrete formwork supporting structure and a construction method, so as to solve the problems.
The utility model provides a hang down combination formula concrete form bearing structure, includes the conventional formwork that props up of console mode, the high formwork that props up of console mode, the formwork that encorbelments, the conventional formwork that props up of console mode is built in the lower part inboard of main structure, the high formwork that props up of console mode is built in the lower part outside of main structure, the cantilever part of layer by layer above the main structure is built to the formwork that encorbelments.
Preferably, the overhanging type support frame is built on overhanging parts layer by layer above the main body structure through a combined I-steel overhanging base.
Preferably, the combined I-steel cantilever foundation comprises a pre-buried U-shaped ring, a cantilever I-steel main beam and a lower supporting I-steel, wherein the pre-buried U-shaped ring is pre-buried in a main body structure, the cantilever I-steel main beam is installed in the main body structure through the pre-buried U-shaped ring, and the lower supporting I-steel is supported below the cantilever I-steel main beam.
Preferably, the top of the cantilever I-steel girder is welded with a positioning short steel bar and a pull-up steel wire rope hanging lug.
Preferably, the lower end of the lower support I-steel is welded on the embedded plate, a first angle steel baffle is arranged on one surface, close to the inner side of the main body structure, of the lower end of the lower support I-steel, the upper end of the lower support I-steel is connected with the overhanging I-steel main beam, and a second angle steel baffle is arranged on one surface, close to the outer side of the main body structure, of the upper end of the lower support I-steel.
Preferably, the embedded plate is embedded in the main body structure.
Preferably, the floor type high formwork support at the lower side of the overhanging type formwork support is outwards extended to form a floor type outer frame body.
Preferably, the floor type outer frame body is provided with a double-groove steel joist, the double-groove steel joist is provided with a jacking, and the jacking is tightly jacked with the cantilever I-steel girder.
Preferably, the outer side of the overhanging type formwork support is provided with inclined double-row upright rods.
A construction method for supporting a top-suspended bottom-supported combined high-large concrete formwork comprises the following steps:
s1, building floor type conventional formwork support layer by layer and constructing a lower layer main body structure, building floor type high formwork support layer by layer, and performing lap joint connection on the floor type high formwork support and the floor type conventional formwork support to form a whole;
s2, hanging the overhanging I-shaped steel girders on a construction floor of a main body structure by adopting a tower crane or an automobile crane, uniformly paving the overhanging I-shaped steel girders on the construction floor according to a certain interval, and fixing the overhanging I-shaped steel girders with a buried U-shaped ring which is pre-buried in advance;
s3, hanging the lower support I-steel to the next layer of the construction floor of the main body structure in advance, placing the lower support I-steel to a designated position, firmly welding the upper end of the lower support I-steel with the cantilever I-steel main beam, and welding and connecting the lower end of the lower support I-steel with an embedded plate pre-embedded in advance;
s4, welding a first angle steel baffle and a second angle steel baffle at the lower end and the upper end of the lower supporting I-steel respectively for reinforcement treatment, and welding a positioning short steel bar and a lifting wire rope hanging lug at the top of the overhanging I-steel girder so as to facilitate the subsequent steel pipe positioning and the lifting wire rope arrangement;
s5, mounting the double-groove steel joist on a floor type outer frame body, mounting a jacking support on the double-groove steel joist, and firmly jacking the bottoms of the overhanging I-steel main beams through the jacking support and the two double-channel steel joists;
s6, erecting an overhanging type formwork support, namely erecting a full-hall overhanging type formwork support above the overhanging I-shaped steel girder, and supporting the dead weight and the construction load of reinforced concrete of a floor to be constructed; when the double-row cantilever beam is erected, oblique double-row upright rods are preferentially erected to serve as a safety protection frame body, the overhanging I-shaped steel main beams are paved through template wood Fang Man to be subjected to hard sealing, a safe and sealed working environment is formed, and other frame bodies on the inner side are erected;
s7, setting up oblique double-row upright rods between the upper cantilever edge beams and the lower cantilever edge beams of the main body structure, and connecting the oblique double-row upright rods with the cantilever formwork support through fasteners to form a triangular stable system;
s8, continuing to construct upwards according to the steps S2-S7, and when the floor is higher, arranging the position of a tower crane in advance, and hoisting construction materials by using the tower crane;
s9, removing the formwork support, after the concrete structural strength meets the design and specification requirements, removing the formwork support from top to bottom part by part, removing the overhanging formwork support firstly, cutting, removing and transferring the lower supporting I-steel after the removal is completed, uniformly transferring overhanging I-steel main beams, and finally removing the floor type conventional formwork support and the floor type high formwork support.
Compared with the prior art, the invention has the beneficial effects that: the template supporting structure can meet the normal construction requirement of the layer-by-layer overhanging structure, and the construction method is not limited by the floor height in theory; for the conditions of more, more complex and larger load of a lower-layer overhanging structure, the template supporting structure has good adaptability, and the floor type frame body adopts 60 series disc buckles, so that the bearing capacity of a single upright rod can be 9t; the invention adopts a more economical construction method, and has mature construction process, high safety and relatively low cost compared with the step-by-step construction of a steel structure platform; the method can be widely applied to all structural constructions in a layer-by-layer outward overhanging mode, and has popularization value.
Drawings
FIG. 1 is a diagram of the structure of an upper suspension and lower bearing combined concrete form support of the present invention;
fig. 2 and 3 are basic construction diagrams of the combined i-steel cantilever of the present invention;
FIG. 4 is a schematic view of a floor-standing outer frame of the present invention;
FIG. 5 is a block diagram of the dual channel steel joist and jacking connection of the present invention;
fig. 6 is a flowchart of the setup method of the present invention.
Reference numerals in the drawings: 1. floor type conventional formwork support; 2. floor type high formwork; 3. overhanging type support die frame; 4. a combination I-steel overhanging base; 401. pre-burying a U-shaped ring; 402. overhanging I-steel main beams; 403. lower supporting I-steel; 404. positioning short steel bars; 405. pulling up the wire rope hanging lugs; 406. embedding a plate; 407. a first angle steel baffle; 408. a second angle steel baffle; 501. a floor type outer frame body; 502. double-groove steel joist; 503. jacking; 6. oblique double-row upright posts; 7. a main body structure.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
As shown in fig. 1 and in combination with fig. 2 to 6, the upper suspension and lower bearing combined concrete formwork support structure comprises a floor type conventional formwork support 1, a floor type high formwork support 2 and an overhanging formwork support 3, wherein the floor type conventional formwork support 1 is built on the inner side of the lower part of a main body structure 7, the floor type high formwork support 2 is built on the outer side of the lower part of the main body structure 7, and the overhanging formwork support 3 is built on the overhanging part layer by layer above the main body structure 7.
Furthermore, the overhanging type support die frame 3 is built on overhanging parts layer by layer above the main body structure through a combined I-steel overhanging base 4.
Further, the combined i-beam overhanging base 4 comprises an embedded U-shaped ring 401, an overhanging i-beam main beam 402 and a lower supporting i-beam 403, wherein the embedded U-shaped ring 401 is embedded in the main body structure 7, the overhanging i-beam main beam 402 is installed in the main body structure 7 through the embedded U-shaped ring 401, and the lower supporting i-beam 403 is supported below the overhanging i-beam main beam 402.
Further, a positioning short steel bar 404 and a pull-up wire rope hanging lug 405 are welded on the top of the overhanging i-steel girder 402.
Further, the lower end of the lower support i-beam 403 is welded on the pre-buried plate 406, a first angle steel baffle 407 is disposed on a surface, close to the inner side of the main body structure, of the lower end of the lower support i-beam 403, the upper end of the lower support i-beam 403 is connected with the overhanging i-beam 402, and a second angle steel baffle 408 is disposed on a surface, close to the outer side of the main body structure, of the upper end of the lower support i-beam 403.
Further, the pre-buried plate 406 is pre-buried in the main structure 7.
Further, the floor type high formwork 2 at the lower side of the overhanging type formwork support 3 is extended outwards to form a floor type outer frame body 501.
Further, a double-groove steel joist 502 is arranged on the floor type outer frame 501, a jacking 503 is arranged on the double-groove steel joist 502, and the jacking 503 jacks the overhanging I-steel girder 402.
Furthermore, an inclined double-row upright rod 6 is arranged on the outer side of the overhanging type formwork support 3.
A construction method for supporting a top-suspended bottom-supported combined high-large concrete formwork comprises the following steps:
s1, erecting a floor type conventional formwork support 1 layer by layer and constructing a lower layer concrete structure, wherein the frame body is not dismounted, erecting a floor type high formwork support 2 layer by layer, and carrying out lap joint connection on an outer side floor type high formwork support 2 and an inner side floor type conventional formwork support 1 to form a whole.
S2, hanging the overhanging I-shaped steel girder 402 on a construction floor by adopting a tower crane or an automobile crane, namely, the top end of the floor type high-support formwork 2, uniformly paving the overhanging I-shaped steel girder 402 on a floor surface according to a certain interval by mechanical cooperation, and fixing the overhanging I-shaped steel girder with a buried U-shaped ring 401 which is pre-buried in advance.
S3, hanging the lower support I-steel 403 to the next layer of the to-be-constructed floor in advance, placing the lower support I-steel 403 to a designated position by utilizing the cooperation of an outer frame or a next layer of full-hall support frame and an electric hoist, manually welding the upper end of the lower support I-steel 403 and the cantilever I-steel main beam 402 firmly, and welding the lower end of the lower support I-steel 403 and the pre-buried plate 406 pre-buried in advance.
S4, welding a first angle steel baffle 407 and a second angle steel baffle 408 at the lower end and the upper end of the lower supporting I-steel 403 respectively for reinforcement treatment, and welding a positioning short steel bar 404 and a pull-up steel wire rope hanging lug 405 at the top of the overhanging I-steel girder 402, so that the subsequent steel pipe positioning and pull-up steel wire rope arrangement are facilitated.
S5, installing the double-groove steel joist 502 on the floor type outer frame body 501, installing the jacking 503 on the double-groove steel joist 502, and firmly jacking the bottoms of the overhanging I-steel girders through the jacking 503 and the two double-groove steel joists 502.
S6, erecting an overhanging type formwork support, namely erecting a full-hall overhanging type formwork support 3 above the overhanging I-shaped steel girder 402, and supporting the dead weight and the construction load of reinforced concrete of a floor to be constructed; when the double-row oblique upright posts 6 are arranged in a building mode, the double-row oblique upright posts are used as safety protection frame bodies, meanwhile, the overhanging I-steel main beams 402 are paved through template wood Fang Man to be sealed in a hard mode, a safe and sealed working environment is formed, and other frame bodies on the inner side are arranged.
And S7, setting up an inclined double-row vertical rod 6 between the upper cantilever edge beam and the lower cantilever edge beam of the main body structure, and connecting the inclined double-row vertical rod 6 with the cantilever type formwork 3 through a fastener to form a triangular stable system.
S8, continuing to construct upwards according to the steps S2-S7, and when the floor is higher, arranging the position of the tower crane in advance, and hoisting construction materials by using the tower crane.
S9, after the structural strength of the concrete meets the design and specification requirements, the formwork support is removed from top to bottom part by part, the overhanging formwork support 3 is removed firstly, the lower support I-steel 403 is cut and removed after the removal is completed, the overhanging I-steel main beam 402 is transported uniformly, and finally the floor type conventional formwork support 1 and the floor type high formwork support 2 are removed.
Compared with the prior art, the invention has the beneficial effects that: the template supporting structure can meet the normal construction requirement of the layer-by-layer overhanging structure, and the construction method is not limited by the floor height in theory; for the conditions of more, more complex and larger load of a lower-layer cantilever structure, the template supporting structure has good adaptability, and the floor type frame body adopts 60 series disc buckles, so that the bearing capacity of a single upright rod can be 9t; the construction method is economical, and is mature in construction process, high in safety and relatively low in cost compared with the step-by-step construction of a steel structure platform; the method can be widely applied to all structural constructions in a layer-by-layer outward overhanging mode, and has popularization value.
Working principle: the floor type conventional formwork support 1 is built layer by layer, a lower layer concrete structure is constructed, the frame body is not dismounted, the floor type high formwork support 2 is built layer by layer, and the outside floor type high formwork support 2 is in lap joint with the inside floor type conventional formwork support 1 to form a whole; the cantilever I-steel main beam 402 is hung on a construction floor surface by adopting a tower crane or an automobile crane, namely, the top end of the floor type high-support die carrier 2, and the cantilever I-steel main beam 402 is uniformly paved on the floor surface according to a certain interval by mechanical cooperation and is fixed with a buried U-shaped ring 401 which is pre-buried in advance; hanging the lower support I-steel 403 to the next layer of the to-be-constructed floor in advance, placing the lower support I-steel 403 to a designated position by utilizing the cooperation of an outer frame or a next layer full-hall support frame and an electric hoist, manually welding the upper end of the lower support I-steel 403 with the cantilever I-steel main beam 402 firmly, and welding the lower end of the lower support I-steel 403 with an pre-buried plate 406 pre-buried in advance; the lower end and the upper end of the lower supporting I-steel 403 are respectively welded with a first angle steel baffle 407 and a second angle steel baffle 408 for reinforcement treatment, and a positioning short steel bar 404 and a lifting steel wire rope hanging lug 405 are welded at the top of the overhanging I-steel main beam 402, so that the subsequent steel pipe positioning and the lifting steel wire rope arrangement are facilitated; the double-groove steel joist 502 is arranged on the floor type outer frame body 501, the double-groove steel joist 502 is provided with a jacking 503, and the bottoms of the cantilever I-steel main beams 402 are firmly jacked up through the jacking 503 and the two double-groove steel joists 502; the cantilever type formwork support 3 is erected, and a full cantilever type formwork support 3 is erected above the cantilever I-shaped steel main beam 402 and is used for supporting the dead weight and the construction load of reinforced concrete of a floor to be constructed; when the double-row cantilever beam is erected, the oblique double-row upright rods 6 are preferentially erected to serve as a safety protection frame body, meanwhile, the overhanging I-shaped steel main beams are paved through template wood Fang Man to be subjected to hard sealing, a safe and sealed working environment is formed, and other frame bodies on the inner side are erected; an inclined double-row upright rod 6 is erected between the upper cantilever edge beam and the lower cantilever edge beam of the main body structure 7, and the inclined double-row upright rod 6 is connected with the cantilever type formwork 3 through a fastener to form a triangular stable system; continuing to repeat the construction process to construct upwards, when the storey is higher, arranging the position of the tower crane in advance, and hoisting construction materials by using the tower crane; after the structural strength of the concrete reaches the design and specification requirements, the formwork is removed from top to bottom part by part, the overhanging formwork 3 is removed firstly, the lower support I-steel 403 is removed and adjusted after the removal is finished, the overhanging I-steel main beam 402 is transported uniformly, and finally the floor type conventional formwork 1 and the floor type high formwork 2 are removed.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.
Claims (10)
1. An upper suspension and lower bearing combined concrete formwork support structure is characterized in that: the novel cantilever formwork comprises a floor type conventional formwork support (1), a floor type high formwork support (2) and a cantilever formwork support (3), wherein the floor type conventional formwork support (1) is built on the inner side of the lower portion of a main body structure, the floor type high formwork support (2) is built on the outer side of the lower portion of the main body structure, and the cantilever formwork support (3) is built on the cantilever portion layer by layer above the main body structure (7).
2. An upper suspension and lower bearing combined concrete formwork support structure as claimed in claim 1, wherein: the cantilever type formwork support (3) is built on a cantilever portion layer by layer above the main body structure (7) through a combined I-steel cantilever foundation (4).
3. An upper suspension lower bearing combined concrete form support structure as claimed in claim 2, wherein: the combined I-steel cantilever foundation (4) comprises a pre-buried U-shaped ring (401), a cantilever I-steel main beam (402) and a lower supporting I-steel (403), wherein the pre-buried U-shaped ring (401) is pre-buried in a main structure, the cantilever I-steel main beam (402) is installed in the main structure through the pre-buried U-shaped ring (401), and the lower supporting I-steel (403) is supported below the cantilever I-steel main beam (402).
4. An upper suspension lower bearing combined concrete form support structure as claimed in claim 3, wherein: the top of the cantilever I-shaped steel girder (402) is welded with a positioning short steel bar (404) and a pull-up steel wire rope hanging lug (405).
5. An upper suspension lower bearing combined concrete form support structure as claimed in claim 3, wherein: the lower extreme welding of propping I-steel (403) down is on pre-buried board (406), the lower extreme that props I-steel (403) down is close to one side of major structure (7) inboard and is provided with first angle steel baffle (407), the upper end that props I-steel (403) down is connected with cantilever I-steel girder (402), the upper end that props I-steel (403) down is close to one side in major structure (7) outside and is provided with second angle steel baffle (408).
6. An upper suspension lower bearing combined concrete form support structure as claimed in claim 5, wherein: the embedded plate (406) is embedded in the main body structure (7).
7. An upper suspension and lower bearing combined concrete formwork support structure as claimed in claim 1, wherein: the floor type high formwork support (2) at the lower side of the overhanging type formwork support (3) is outwards extended to form a floor type outer frame body (501).
8. An upper suspension lower bearing combined concrete form support structure as claimed in claim 7, wherein: the floor type outer frame body (501) is provided with a double-groove steel joist (502), the double-groove steel joist (502) is provided with a jacking (503), and the jacking (503) jacks up the cantilever I-steel girder (402).
9. An upper suspension and lower bearing combined concrete formwork support structure as claimed in claim 1, wherein: an inclined double-row upright rod (6) is arranged on the outer side of the overhanging type formwork support (3).
10. A method of constructing a combined suspension and suspension concrete formwork support structure as claimed in any one of claims 1 to 9, wherein: the method comprises the following steps:
s1, building floor type conventional formwork support (1) layer by layer and constructing a lower layer main body structure 7, building floor type high formwork support (2) layer by layer, and performing lap joint connection on the floor type high formwork support (2) and the floor type conventional formwork support (1) to form a whole;
s2, hanging the overhanging I-shaped steel main beam (402) on a construction floor of a main body structure (7) by adopting a tower crane or an automobile crane, uniformly paving the overhanging I-shaped steel main beam (402) on the construction floor at a certain interval, and fixing the overhanging I-shaped steel main beam with a buried U-shaped ring (401) which is pre-buried in advance;
s3, hanging the lower support I-steel (403) to the next layer of a construction floor of the main structure (7) in advance, placing the lower support I-steel (403) to a designated position, firmly welding the upper end of the lower support I-steel (403) and the cantilever I-steel main beam (402), and welding and connecting the lower end of the lower support I-steel (403) with an pre-buried plate (406) pre-buried in advance;
s4, welding a first angle steel baffle (407) and a second angle steel baffle (408) at the lower end and the upper end of the lower supporting I-steel (403) respectively for reinforcement treatment, and welding a positioning short steel bar (404) and a pull-up steel wire rope hanging lug (405) at the top of the overhanging I-steel girder (402);
s5, mounting double-groove steel joists (502) on a floor type outer frame body (501), mounting jacking (503) on the double-groove steel joists (502), and firmly jacking the bottoms of the overhanging I-shaped steel girders (402) through the jacking (503) and the two double-groove steel joists (502);
s6, erecting an overhanging type formwork support (3), and erecting a full-hall overhanging type formwork support (3) above the overhanging I-steel main beam (402) for supporting the dead weight and the construction load of reinforced concrete of a building floor to be constructed; when the double-row cantilever beam is erected, the oblique double-row upright rods (6) are preferentially erected and serve as safety protection frame bodies, the overhanging I-shaped steel main beams (402) are paved through template wood Fang Man to be subjected to hard sealing, a safe and sealed working environment is formed, and then other frame bodies on the inner side are erected;
s7, an inclined double-row upright rod (6) is erected between the upper cantilever edge beam and the lower cantilever edge beam of the main body structure (7), and the inclined double-row upright rod (6) is connected with the cantilever formwork (3) through a fastener to form a triangular stable system;
s8, continuing to construct upwards according to the steps S2-S7, and when the floor is higher, arranging the position of a tower crane in advance, and hoisting construction materials by using the tower crane;
s9, removing the formwork support, after the concrete structural strength meets the design and specification requirements, removing the formwork support from top to bottom part by part, firstly removing the overhanging formwork support (3), cutting, removing and transferring the lower support I-steel (403) after the removal is finished, and finally uniformly transferring the overhanging I-steel girder (402), and removing the floor type conventional formwork support (1) and the floor type high formwork support (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311121225.8A CN117188760A (en) | 2023-08-30 | 2023-08-30 | Upper suspension and lower bearing combined concrete formwork supporting structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311121225.8A CN117188760A (en) | 2023-08-30 | 2023-08-30 | Upper suspension and lower bearing combined concrete formwork supporting structure and construction method |
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