CN107227814B - A kind of large cantilever concrete structure section construction method - Google Patents
A kind of large cantilever concrete structure section construction method Download PDFInfo
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- CN107227814B CN107227814B CN201710465270.3A CN201710465270A CN107227814B CN 107227814 B CN107227814 B CN 107227814B CN 201710465270 A CN201710465270 A CN 201710465270A CN 107227814 B CN107227814 B CN 107227814B
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- overhanging
- scaffold
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/40—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings for coffered or ribbed ceilings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
- E04G11/48—Supporting structures for shutterings or frames for floors or roofs
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/16—Members, e.g. consoles, for attachment to the wall to support girders, beams, or the like carrying forms or moulds for floors, lintels, or transoms
Abstract
Step 1 that a kind of large cantilever concrete structure section construction method includes that steps are as follows: according to the overhanging size of overhanging concrete structure, overhanging concrete structure to be onstructed is divided into the first construction section and the second construction section；Step 2: in the main structure below overhanging concrete structure to be onstructed, the frame edge along main structure is laid with scaffold support；Step 3: the construction of the first construction section overhanging concrete structure to be onstructed is carried out；Step 4: the pre-buried anchor ring on the lateral surface of overhanging concrete structure upper body structure to be onstructed；Step 5: it is drawn between the main structure and scaffold support above overhanging concrete structure and sets suspension cable；Step 6: supporting element is set between scaffold support and the frame column of main structure；Step 7: the construction of the second construction section overhanging concrete structure to be onstructed is carried out.The technical issues of section that the present invention solves scaffold support in conventional construction method is big, the scaffold scale of construction is big, uneconomical and height can not achieve greatly very much.
Description
Technical field
The invention belongs to building fields, in particular to large cantilever concrete structure construction method.
Background technique
The concrete large cantilever concrete of prominent exterior wall is often arranged in order to meet building requirements in large-scale high-rise public building
Structure, form bracing system become the construction Difficulties of total.Since overhanging concrete structure is apart from ground height, using falling
Ground formula support system is all infeasible in economy, technology, chooses support frame or the pure overhanging support construction of fashioned iron outside using simple steel pipe
It is limited again by cantilever span；Traditional method is usually the method for once adding support or wire rope inclined-pulling with fashioned iron, but traditional
Construction method haves the shortcomings that following: 1. fashioned iron overhanging is completed as overhanging formwork platform one-time-concreting, to meet foot hand in this way
Frame transmits the strength and stiffness requirement of load, and fashioned iron section is big, and transport and processing difficulties, end reaction is big, is easy to make structure
At destruction；2. the full hall scaffold scale of construction is big, long in time limit, uneconomical and cannot construct simultaneously in lower section, height be can not achieve greatly very much；
3. using the form of multiple tracks bearing diagonal adding type girder steel, this scheme steel using amount is big, and built-in fitting is more, and the supported underneath welding in high-altitude is tired
Difficulty needs to set up process operation frame；4. using multiple tracks drag-line form, top node pulling force is big, generally requires to be divided into multiple drawknots
Point, pre-buried dowel is more, and drag-line needs to add excessive linking beam more.
Summary of the invention
The invention proposes a kind of large cantilever concrete structure section construction methods, to solve in conventional construction method to foot
The section of hand cradle support is big, is easy to damage main structure, the full hall scaffold scale of construction of use is big, it is long in time limit, uneconomical,
The technical issues of height can not achieve greatly very much, needs to set up process operation frame and need to be using multiple tracks drag-line form.
To achieve the above object, the present invention adopts the following technical scheme that.
A kind of large cantilever concrete structure section construction method, including steps are as follows.
Step 1: according to the overhanging size of overhanging concrete structure, overhanging concrete structure to be onstructed is divided into first and is applied
Workshop section and the second construction section；Wherein the first construction section overhangs 2.5m ~ 3.5m, the second construction section along main structural frame edge outward
Outer edge along the first construction section overhangs 3.0m ~ 3.5m outward.
Step 2: in the main structure below overhanging concrete structure to be onstructed, the frame edge along main structure is spread
If scaffold support, one end of scaffold support is fixed on the body construction, and the other end of scaffold support exceeds main structure
Frame edge, overhanging is in outside the side of main structure, and the overhanging size of scaffold support and overhanging concrete structure to be onstructed
Overhanging size be adapted.
Step 3: the construction of the first construction section overhanging concrete structure to be onstructed is carried out；Specific method includes that steps are as follows.
Step a: the first segment beam bottom scaffold and first of the first construction section overhanging concrete structure bottom to be onstructed is set up
Section board bottom scaffold；The plate that wherein first segment board bottom scaffold is inclined at overhanging concrete structure to be onstructed is hanged with to be onstructed
It chooses between the main structure below concrete structure；The beam of overhanging concrete structure to be onstructed is arranged in first segment beam bottom scaffold
Between the scaffold support below the beam of overhanging concrete structure to be onstructed.
Step b: template die plate and the first construction section for setting up the first construction section overhanging concrete structure to be onstructed are to be onstructed outstanding
Choose the beam forms of concrete structure.
Step c: the board concrete and beam concrete of the first construction section overhanging concrete structure to be onstructed are poured.
Step 4: the pre-buried anchor ring on the side of overhanging concrete structure upper body structure to be onstructed.
Step 5: board concrete intensity and beam concrete to the first construction section overhanging concrete structure in step c
When intensity reaches design strength, is drawn between the main structure and scaffold support above overhanging concrete structure and set oblique pull
The upper end of rope, suspension cable is fixed on anchor ring, and the lower end of suspension cable is connected to the end of scaffold support.
Step 6: supporting element is set between scaffold support and the frame column of main structure；The lower end of supporting element is connected
It connects on frame column, the upper end of supporting element is supported on the bottom of scaffold support.
Step 7: the construction of the second construction section overhanging concrete structure to be onstructed is carried out；Specific method includes that steps are as follows.
Step A: the second segment beam bottom scaffold and second of the second construction section overhanging concrete structure bottom to be onstructed is set up
Section board bottom scaffold；
The second segment beam bottom scaffold and second segment board bottom scaffold are full hall frame；And second segment beam bottom scaffold
It is connect with first segment beam bottom scaffold, second segment board bottom scaffold is connect with first segment board bottom scaffold.
Step B: template die plate and the second construction section for setting up the second construction section overhanging concrete structure to be onstructed are to be onstructed outstanding
Choose the beam forms of concrete structure.
Step C: the board concrete and beam concrete of the second construction section overhanging concrete structure to be onstructed are poured.
Step D: the seam between the first construction section and the second construction section beam concrete is handled, while being applied to first
Seam between workshop section and the second construction section board concrete is handled, and so far construction finishes.
Preferably, scaffold support includes along the spaced one group of type of main structural frame sides aligned parallel in step 2
Girder steel, the springboard being laid on section steel beam and the protective net being disposed around below section steel beam；The anchoring section of the section steel beam passes through
Hoop sets U-shaped dowel above it and fixes on the body construction, and the overhanging section of section steel beam vertically overhangs in the side of main structure
Outside；The U-shaped dowel is provided with one group, is arranged along the long axis direction parallel interval of section steel beam, and two free ends of U-shaped dowel
It is embedded in the floor of main structure；The section steel beam bottom is equipped with antiskid part；The antiskid part is correspondingly arranged at master
The side wall two sides at body structural framing edge, and side wall is stuck in the groove of its composition.
Preferably, step 3 is before setting up first segment beam bottom scaffold and first segment board bottom scaffold, in section steel beam
Top, corresponding first segment beam bottom scaffold position at transversely parallel interval be connected with first segment beam bottom coupling beam, described first
The top of section beam bottom coupling beam, is equipped at intervals with vertical plug-in unit along its long axis direction；Top, corresponding first segment board bottom foot in section steel beam
Transversely parallel interval is connected with first segment board bottom coupling beam at the position of hand cradle.
Preferably, the first segment board bottom scaffold includes bearing diagonal, the first horizontal rod, first longitudinal direction horizon bar
With the first scissors strut；The bottom end of the bearing diagonal is fixed on main structural frame edge, the upper end of bearing diagonal is inclined outwardly,
It is supported on the bottom of the template die plate of overhanging concrete structure to be onstructed；The first horizontal rod parallel interval is connected to oblique branch
Between support, the first horizontal rod and bearing diagonal are connected at intersection position by cruciform fastening for falsework；The first longitudinal direction horizon bar
Parallel interval is connected between the first horizontal rod and the intersection point of bearing diagonal, first longitudinal direction horizon bar and the first horizontal rod
It is connected at intersection position by cruciform fastening for falsework.
Preferably, the bearing diagonal is made of steel pipe；It is equipped at the top of the section steel beam, at the link position of corresponding bearing diagonal
Plug-in unit is tilted, the bottom end noose of the bearing diagonal is on inclination plug-in unit.
Preferably, first segment beam bottom scaffold includes the first upright bar, the second horizontal rod, second longitudinal direction in step 3
Horizon bar and the second scissors strut；The bottom end of first upright bar corresponds to noose and inserts in the vertical of the top of first segment beam bottom coupling beam
On part.
Preferably, suspension cable described in step 5 has one group, arrangement corresponding with section steel beam, and the lower end of suspension cable is connected to
The end of section steel beam overhanging section；Before drawing sets suspension cable, the overhanging section bottom surface of section steel beam is equipped with prevention at end position
The mobile antiskid part of suspension cable.
Preferably, supporting element described in step 6 is connected between section steel beam and the frame column of main structure；The support
The upper end of part is supported on the bottom of section steel beam.
Preferably, the step 7 is before setting up second segment beam bottom scaffold and second segment board bottom scaffold, in fashioned iron
Transversely parallel interval is connected with second segment beam bottom coupling beam at the top of beam, the position of correspondence first segment beam bottom scaffold, described
The top of second segment beam bottom coupling beam is equipped at intervals with vertical plug-in unit along its long axis direction；Top, corresponding second segment plate in section steel beam
Transversely parallel interval is connected with second segment board bottom coupling beam at the position of footing hand cradle；It is vertical in the second segment beam bottom scaffold
Bar bottom end corresponds to noose on the vertical plug-in unit at the top of second segment beam bottom coupling beam；Upright bar bottom in the second segment board bottom scaffold
End is supported at the top of the section steel beam of the second construction section.
Preferably, the suspension cable includes upper oblique pull cable elements, lower suspension cable unit and is connected to two skew cables
Flower basket bolt between unit；Wherein the lower end of upper oblique pull cable elements is connect with the pull rod on flower basket bolt top, lower suspension cable list
The upper end of member is connect with the pull rod of flower basket bolt lower part.
Compared with prior art the invention has the characteristics that and beneficial effect.
1, section steel beam is divided into multistage continuous beam support model because of the method by the method in the present invention, greatly optimizes biography
The stress form of supporting beam in the cantilevered system of system, therefore section steel beam of the invention is optional compared to supporting beam in traditional cantilevered system
The small fashioned iron in fashioned iron section selected, fashioned iron steel using amount are reduced.
2, in the present invention in the construction of the first construction section, since first segment board bottom scaffold uses bearing diagonal, below
Section steel beam does not have to stress, and the load of top transmitting directly relies on bearing diagonal power transmission to the frame beam of the edge of main structure,
Stress form is reasonable, saves the material utilization amount of scaffold support system.
3, being applied in combination using bearing diagonal and drag-line of the scaffold support in the present invention, again compared to traditional scaffold support
The form that bottom installation multiple tracks bearing diagonal reinforces section steel beam is played, bring steel using amount is big, built-in fitting is more, the weldering of the supported underneath in high-altitude
It connects difficulty, need to set up the shortcomings that process operation frame；Processing early period of the invention arrangement is convenient, and later period disassembly is easy, and the
When two construction sections are constructed, the section steel beam below beam, plate draws wirerope, and the fashioned iron beam model below second segment board bottom scaffold is
Two span continuous beams, and the fashioned iron beam model below second segment beam bottom scaffold be three-span continuous beam, scaffold support stable structure,
Stress performance is good and high safety.
4, bar dowel head is set on the corresponding section steel beam in bearing diagonal bottom in the present invention as inclination plug-in unit, steel bar end one
End is fixed on the other end on section steel beam and exposes section steel beam upper surface, prevents bearing diagonal from generating sliding because of the effect of horizontal component.
5, suspension cable includes upper oblique pull cable elements, lower suspension cable unit and is connected to two skew cables in the present invention
Flower basket bolt between unit；Wherein the lower end of upper oblique pull cable elements is connect with the pull rod on flower basket bolt top, lower suspension cable list
The upper end of member is connect with the pull rod of flower basket bolt lower part；Due to suspension cable fixing end be buckled under load action have it is certain
Sliding, therefore before the construction for carrying out the second construction section overhanging concrete structure to be onstructed, flower basket bolt is tightened, section steel beam is made
Overhanging end keep horizontality, such as lead to section steel beam bottom flexibility because of the sliding of suspension cable, can continue tightening gaily decorated basket spiral shell
Bolt makes its level, and until stablizing, so that the amount of deflection of section steel beam is adjusted work in this way becomes convenient.
6, the beam construction joint of main structure overhanging concrete structure to be onstructed does reinforcement processing in the present invention, applies second
The beam of workshop section vibrates again after the completion of vibrating, at the construction joint of middle part, and this construction method prevents section steel beam in deflection deformation
Lower construction joint cracks, and ensure that the globality of beam.
7, the shape that the scaffold in the present invention is combined using overhanging bearing diagonal scaffold with the full hall foot scaffold of overhanging
Formula, in conventional construction method only with full hall scaffold, the scale of construction is small, short time limit, economy and can apply simultaneously in lower section
Work, height are also able to achieve greatly very much.
8, the present invention overhangs concrete structure using builder's jack Construction of Supporting, and builder's jack support overhanging is in main body
The side of structure, can construct car ramp and waterproof simultaneously below, opposite to shorten the construction period.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that section steel beam of the present invention is connect with main structure.
Fig. 2 is the schematic diagram that overhanging concrete structure to be onstructed is divided into the first construction section and the second construction section by the present invention.
Fig. 3 is the positive structure schematic that first segment board bottom scaffold building is completed in the present invention.
Fig. 4 is the A point enlarged structure schematic diagram in Fig. 3.
Bridging arrangement schematic diagram when Fig. 5 is the first horizontal rod spreading in the present invention.
Fig. 6 is the positive structure schematic that first segment beam bottom scaffold building is completed in the present invention.
Fig. 7 is the side structure schematic diagram that first segment beam bottom scaffold building is completed in the present invention.
Fig. 8 is the positive structure schematic that second segment board bottom scaffold building is completed in the present invention.
Fig. 9 is the connection structure of first segment board bottom scaffold and second segment board bottom scaffold and section steel beam amplification in the present invention
Schematic diagram.
Figure 10 is that first segment board bottom coupling beam and second segment board bottom coupling beam are laid on the structural representation on section steel beam in the present invention
Figure.
Figure 11 is the positive structure schematic that second segment beam bottom scaffold building is completed in the present invention.
Appended drawing reference: 1-main structure, 2-section steel beams, 3-first segment beam bottom scaffolds, 3.1-the first upright bars,
3.2-the second horizontal rods, 3.3-second longitudinal direction horizon bars, 3.4-the second scissors struts, 4-first segment board bottom foot hands
Frame, 4.1-bearing diagonals, 4.2-the first horizontal rods, 4.3-first longitudinal direction horizon bars, 4.4-the first scissors struts, 5-
Anchor ring, 6-suspension cables, 7-second segment beam bottom scaffolds, 8-second segment board bottom scaffolds, 9-U-shaped dowels, 10-antiskids
Part, 11-frame columns, 12-supporting elements, 13-first segment beam bottom coupling beams, 14-first segment board bottom coupling beams, 15-second segment beam bottoms
Coupling beam, 16-second segment board bottom coupling beams, 17-the first cushion blocks, 18-the second cushion blocks, 19-frame beams.
Specific embodiment
As depicted in figs. 1 and 2, the main structure 1 of the present embodiment is the hotel a Ge Liuxing project, five layers of east of hotel's podium
It is 27.15m that side, which overhangs balcony structure beam floor elevation, and overhanging concrete structure goes out the 6200mm of 1 size of main structure, is big outstanding
Choose concrete structure；The beam section size of overhanging concrete structure has in six, respectively the mm of 400 mm × 1200,600 mm
× 1300 mm, the mm of 300 mm × 1200, the mm of 500 mm × 1300, the mm of 400 mm × 1300, the mm of 200 mm × 1300, most
Big section is 600 × 1300mm, and liftoff lower room overhead height reaches 32.1m, hotel at this four layers be swimming pool, bottom of pond absolute altitude
21.2m(is pushed up with the beam slab absolute altitude of four layer main body structures in 20m, pond), four layers and five layers of layer height is 6m；To overhanging coagulation
When soil structure is constructed, using the scheme of section construction；First construction section: pre-buried U-shaped dowel 9 sets up section steel beam 2, while using foot
Hand cradle sets up the formwork system of overhanging concrete structure；Second construction section: it in the pre-buried anchor ring 5 in layer 6 corresponding position, has constructed
And after reaching some strength, stretching wire rope, while type steel support part 12 is added under beam, it is taken in the second construction section of section steel beam 2
If beam, the hardened structure of the full other 3.2m overhanging concrete structure of hall supporting frame construction.
The specific construction procedure of this large cantilever concrete structure section construction method is as follows.
Step 1: according to the overhanging size of overhanging concrete structure, overhanging concrete structure to be onstructed is divided into first and is applied
Workshop section and the second construction section；Wherein the first construction section overhangs 3m along 1 frame edge of main structure outward, sets up by four layers oblique
Support scaffolding overhangs 3.2m along the outer edge of the first construction section as support system, the second construction section outward；Four layers of main body
1 frame edge structure of structure includes the frame beam 19 being connected on the outside of curtain wall, as depicted in figs. 1 and 2.
Step 2: in the main structure 1 below overhanging concrete structure to be onstructed, along the frame edge of main structure 1
It is laid with scaffold support, one end of scaffold support is fixed in main structure 1, and the other end of scaffold support exceeds main body knot
1 frame edge of structure, overhanging is in outside the side of main structure 1, and the overhanging size of scaffold support and overhanging concrete to be onstructed
The overhanging size of structure is adapted；Scaffold support includes one group of type along the setting of 1 frame edge parallel interval of main structure
Girder steel 2, the springboard being laid on section steel beam 2 and the protective net for being disposed around 2 lower section of section steel beam；The anchoring section of the section steel beam 2
It is fixed in main structure 1 by binding round the U-shaped dowel 9 set above it, the overhanging section of section steel beam 2 vertically overhangs in main structure
Outside 1 side；The U-shaped dowel 9 is provided with one group, is arranged along the long axis direction parallel interval of section steel beam 2, and U-shaped dowel 9
Two free ends are embedded in the floor of main structure 1；Wherein close to the U-shaped dowel 9 and type of the anchoring section end of section steel beam 2
It is equipped with the second cushion block 18 in gap between the top of girder steel 2, the first pad is equipped between 19 top section steel beam of frame beam, 2 bottom
Block 17；2 bottom of section steel beam is equipped with antiskid part 10；The antiskid part 10 is correspondingly arranged at 1 frame edge of main structure
Basin side wall two sides, and by basin side wall be stuck in its composition groove in, as depicted in figs. 1 and 2.
As shown in Fig. 3-Fig. 7, step 3: the construction of the first construction section overhanging concrete structure to be onstructed is carried out；Specific side
Method includes that steps are as follows.
Step a: the first segment beam bottom scaffold 3 and first of the first construction section overhanging concrete structure bottom to be onstructed is set up
Section board bottom scaffold 4；Wherein first segment board bottom scaffold 4 be inclined at it is to be onstructed overhanging concrete structure plate with it is to be onstructed
Overhang between the main structure 1 below concrete structure；First segment beam bottom scaffold 3 is arranged in overhanging concrete structure to be onstructed
Beam and it is to be onstructed overhanging concrete structure beam below scaffold support between；The type of 4 bottom of first segment board bottom scaffold
Girder steel 2 does not stress, and the operating platform and protection of a net, Dense mesh screen and springboard as people are widened on section steel beam 2.
Step b: template die plate and the first construction section for setting up the first construction section overhanging concrete structure to be onstructed are to be onstructed outstanding
Choose the beam forms of concrete structure.
Step c: the board concrete and beam concrete of the first construction section overhanging concrete structure to be onstructed are poured.
Step 5: board concrete intensity and beam concrete to the first construction section overhanging concrete structure in step c
When intensity reaches design strength 100%, draws and set between the main structure 1 and scaffold support above overhanging concrete structure
Suspension cable 6, the upper end of suspension cable 6 are fixed on anchor ring 5, and the lower end of suspension cable 6 is connected to the end of scaffold support.
Step 6: supporting element 12 is set between scaffold support and the frame column of main structure 1 11；By supporting element 12
Lower end is connected on frame column 11, and the upper end of supporting element 12 is supported on the bottom of scaffold support；
As shown in figures s-11, step 7: the construction of the second construction section overhanging concrete structure to be onstructed is carried out；Specific side
Method includes that steps are as follows.
Step A: the second segment beam bottom scaffold 7 and second of the second construction section overhanging concrete structure bottom to be onstructed is set up
Section board bottom scaffold 8；First segment board bottom scaffold 4 and first segment beam bottom scaffold 3 are not removed simultaneously；First segment board bottom foot at this time
The load of hand cradle 4 is supported without section steel beam 2, but using the frame beam 19 of main structure 1 as the stress point of bearing diagonal 4.1,
Vierendeel girder, the floor one-time-concreting of the same five layer main body structures 1 of overhanging concrete structure leading portion 3m to be onstructed, such construction joint stay in
The middle part of overhanging concrete structure；It is full hall frame by second segment beam bottom scaffold 7 and second segment board bottom scaffold 8；And
Second segment beam bottom scaffold 7 is connect with first segment beam bottom scaffold 3, second segment board bottom scaffold 8 and first segment board bottom scaffold 4
Connection.
Step B: template die plate and the second construction section for setting up the second construction section overhanging concrete structure to be onstructed are to be onstructed outstanding
Choose the beam forms of concrete structure.
Step C: the board concrete and beam concrete of the second construction section overhanging concrete structure to be onstructed are poured.
Step D: the seam between the first construction section and the second construction section beam concrete is handled, while being applied to first
Seam between workshop section and the second construction section board concrete is handled, and so far construction finishes.
In the present embodiment, the main structure 1 in step 2 below overhanging concrete structure to be onstructed is four layers of swimming pool
Structure stays the dowel of twice HPB300 diameter 18mm as the anchoring of section steel beam 2 in swimming pool structure construction on bottom of pond secondary beam
The U-shaped dowel 9 of section, the benefit that U-shaped dowel 9 is anchored in bottom of pond secondary beam is to prevent leak, and section steel beam 2 is lower than basin side wall beam
50mm, therefore will be on the frame beam 19 at the marginal position of main structure 1, the bottom of section steel beam 2 the first cushion block 17 of pad i.e. flitch
As support, and support is made to be higher than basin side wall beam 20mm, the subsequent scaffold frame body that installs will consider that this highly will be to be onstructed outstanding
The absolute altitude accurate positioning of the beam, plate of concrete structure is chosen, and the gap between the bottom of section steel beam 2 and main structure 1 is in fashioned iron
It is flitch wedging with the second cushion block 18 after beam 2 installs.
In the present embodiment, section steel beam 2 is made of 22a# I-steel, and rectangular section steel can also be used in other embodiments
Or the fashioned iron of the other forms such as H-shaped steel is made.
In the present embodiment, step 3 is before setting up first segment beam bottom scaffold 3 and first segment board bottom scaffold 4, in type
Transversely parallel interval is connected with first segment beam bottom coupling beam at the top of girder steel 2, the position of correspondence first segment beam bottom scaffold 3
13, the top of the first segment beam bottom coupling beam 13 is equipped at intervals with vertical plug-in unit along its long axis direction, and vertical plug-in unit is column herein
Reinforcing bar；Transversely parallel interval is connected with first segment at the top of section steel beam 2, the position of corresponding first segment board bottom scaffold 4
Board bottom coupling beam 14；The first segment beam bottom coupling beam 13 and first segment board bottom coupling beam 14 are that channel steel is made.
As shown in Figure 3 and Figure 4, in the present embodiment, the first segment board bottom scaffold 4 includes bearing diagonal 4.1, and first is horizontal
To horizon bar 4.2, first longitudinal direction horizon bar 4.3 and the first scissors strut 4.4；The bottom end of the bearing diagonal 4.1 is fixed on main body
In 1 frame edge of structure, the upper end of bearing diagonal 4.1 is inclined outwardly, is supported on the template die plate of overhanging concrete structure to be onstructed
Bottom；First horizontal rod, 4.2 parallel interval is connected between bearing diagonal 4.1, the first horizontal rod 4.2 and tiltedly branch
Support 4.1 is connected at intersection position by cruciform fastening for falsework；4.3 parallel interval of first longitudinal direction horizon bar is connected to first laterally
Between horizon bar 4.2 and the intersection point of bearing diagonal 4.1, first longitudinal direction horizon bar 4.3 and the first horizontal rod 4.2 are in intersection position
Place is connected by cruciform fastening for falsework.
In the present embodiment, the bearing diagonal 4.1 is made of steel pipe；2 top of section steel beam, the company for corresponding to bearing diagonal 4.1
It connects and is equipped with inclination plug-in unit at position, the bottom end noose of the bearing diagonal 4.1 is on inclination plug-in unit.
As shown in Figure 6 and Figure 7, in the present embodiment, in step 3 first segment beam bottom scaffold 3 include the first upright bar 3.1,
Second horizontal rod 3.2, second longitudinal direction horizon bar 3.3 and the second scissors strut 3.4；The bottom end pair of first upright bar 3.1
Answer noose on the vertical plug-in unit at the top of first segment beam bottom coupling beam 13.
As shown in Figure 8 and Figure 11, in the present embodiment, suspension cable 6 described in step 5 has one group, cloth corresponding with section steel beam 2
It sets, and the lower end of suspension cable 6 is connected to the end that section steel beam 2 overhangs section；Before drawing sets suspension cable 6, the overhanging section of section steel beam 2
Bottom surface is equipped with the antiskid part 10 for preventing suspension cable 6 mobile at end position.
In the present embodiment, supporting element 12 described in step 6 is connected to section steel beam 2 and the master of the position two sides of frame column 11
Between the frame column 11 of body structure 1；The upper end of the supporting element 12 is supported on the bottom of section steel beam 2, the bottom apart from section steel beam 2
Support horizontal distance be 2000mm；The lower end of supporting element 12 is connected on frame column 11, the bottom support bracket apart from section steel beam 2
Vertical distance is 2000mm；Supporting element 12 is made of 12.6 channel steel.
Shown in Figure 11, in the present embodiment, the step 6 is setting up second segment beam bottom scaffold 7 and second segment board bottom foot hand
Before frame 8, transversely parallel interval is connected with second at the top of section steel beam 2, the position of corresponding first segment beam bottom scaffold 3
Section beam bottom coupling beam 15, the top of the second segment beam bottom coupling beam 15 is equipped at intervals with vertical plug-in unit along its long axis direction；In section steel beam
2 top, corresponding second segment board bottom scaffold 8 position at transversely parallel interval be connected with second segment board bottom coupling beam 16；
Upright bar bottom end in the second segment beam bottom scaffold 7 corresponds to noose on the vertical plug-in unit at 15 top of second segment beam bottom coupling beam；
Upright bar bottom end in the second segment board bottom scaffold 8 is supported on 2 top of section steel beam of the second construction section；
The second segment beam bottom coupling beam 15 and second segment board bottom coupling beam 16 are that channel steel is made.
As shown in Figure 8 and Figure 11, in the present embodiment, the suspension cable 6 includes upper oblique pull cable elements, lower suspension cable unit
And it is connected to the flower basket bolt between two skew cables units；The wherein lower end with flower basket bolt top of upper oblique pull cable elements
Pull rod connection, the upper end of lower suspension cable unit is connect with the pull rod of flower basket bolt lower part；Due to being buckled in for 6 fixing end of suspension cable
Certain sliding is had under load action, therefore before the construction for carrying out the second construction section overhanging concrete structure to be onstructed, it will
Flower basket bolt tightening makes the overhanging end of section steel beam 2 keep horizontality, such as leads to 2 end of section steel beam because of the sliding of suspension cable 6
Downwarp, should tighten flower basket bolt again makes its level, until stablizing.
In the present embodiment, whether the first construction section or the second construction section, the section steel beam 2 below beam and plate support it
It is different；First construction section, 120mm slab do not have to 2 stress of section steel beam, give four layer main body knots by 4.1 power transmission of bearing diagonal
The frame beam 19 of structure 1, and the first upright bar 3.1 is supported on section steel beam 2 under the beam of the cantilevered structure to be onstructed of the first construction section, type
The bottom of girder steel 2 will weld 12.6 channel steel support parts 12 and be supported on frame column 11, and the model of section steel beam 2 is two across one end at this time
Overhanging continuous beam；Second construction section, beam, the plate lower section section steel beam 2 of cantilevered structure to be onstructed draw and set 6 wirerope of suspension cable,
2 model of 3.2m section steel beam of 8 lower section of second segment board bottom scaffold is two span continuous beams, and 7 lower section of second segment beam bottom scaffold
2 model of section steel beam is three-span continuous beam.
In the present embodiment, for the safety for guaranteeing large cantilever concrete structure formwork, frame inside four layers of main structure 1
Set a roof beam in place, on floor using previous upright bar spacing 800*800mm formwork system, section steel beam 2 anchoring segment limit main body knot
It is unanimously 1200mm that upright bar step distance adjustment on structure 1, which overhangs the upright bar step pitch in section with section steel beam 2, in main structure 1
It is supported on the pond of 2 lower part of section steel beam with horizon bar, is connected with cruciform fastening for falsework between horizon bar and upright bar.
As shown in Figure 4 and Figure 5, the bearing diagonal 4.1 of first segment board bottom scaffold 4 is toppled due to unstable in the present embodiment
Torque, by the above calculated result, the axle power of the first horizontal rod of top 4.2 is maximum, therefore the node of the first horizontal rod 4.2
It should be noted that forbidding using docking, when the first 4.2 spreading of horizontal rod using lap joint form, the connection of three rotary buckles.Tiltedly
The connecting node of support 4.1 and first longitudinal direction horizon bar 4.3 and the first horizontal rod 4.2 should are as follows: bearing diagonal 4.1 and first
Longitudinal horizontal rod 4.3 is connected with cruciform fastening for falsework, uses cross buckle between first longitudinal direction horizon bar 4.3 and the first horizontal rod 4.2
Part connection, forbids to be connected with rotary buckle, guarantees that bearing diagonal 4.1 does not rotate at node.
In the present embodiment, 4.1 bottom of bearing diagonal bores the hole of 16mm diameter using electric drill on section steel beam 2, squeezes into
The bar dowel head of diameter 16mm long 200mm exposes 100mm, prevents from tiltedly propping up as inclination plug-in unit, steel bar end driving depth 100mm
Support 4.1 generates sliding because of the effect of horizontal component.
In the present embodiment, the free height that horizon bar is extended through at the top of upright bar is not greater than 300mm；The calculating branch of section steel beam 2
Seat on the frame beam 19 at 1 edge of main structure, since frame Liang19Ding is 50mm lower than swimming pool side wall top, thus apply flitch by its
It paves and becomes real support；8# channel steel company should be welded on section steel beam 2 at first construction section marginal position along longitudinal direction
Binder, the middle part and end of the second construction section section steel beam 2 should also weld elongated 8# channel steel coupling beam and increase overall stability, reduce
The Out-of-plane Effective Length of section steel beam 2, and three row's upright bars of the full hall frame on the second construction section at end position are set up
Bottom of upright rod and the 22a I-steel edge of a wing are welded afterwards, in the case where sweeping the floor bar and scissors strut, can be considered whole.
It, should be with overhanging concrete to be onstructed outside hotel lobby at the beam middle section construction joint of main structure 1 in the present embodiment
The beam construction joint of structure does reinforcement processing, and beam two sides separately add 14 150 reinforcing bar of HRB400 diameter (non-anti- to sprain), inside side frame
Position anchors into 2000mm, and overhanging anchors into 1500mm outward, and the beam of the second construction section, should at the construction joint of middle part after the completion of vibrating
It vibrates again, prevents leakiness of the section steel beam 2 under deflection deformation at concrete construction joint.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention covers those skilled in the art
Member according to the present invention design it is conceivable that equivalent technologies mean.
Claims (10)
1. a kind of large cantilever concrete structure section construction method, which is characterized in that comprise the following steps that
Step 1: according to the overhanging size of overhanging concrete structure, overhanging concrete structure to be onstructed is divided into the first construction section
With the second construction section；Wherein the first construction section overhangs 2.5m ~ 3.5m, the second construction section along main structure (1) frame edge outward
Outer edge along the first construction section overhangs 3.0m ~ 3.5m outward；
Step 2: the frame edge in the main structure (1) below overhanging concrete structure to be onstructed, along main structure (1)
It is laid with scaffold support, one end of scaffold support is fixed on main structure (1), and the other end of scaffold support exceeds main body
Structure (1) frame edge, overhanging is in outside the side of main structure (1), and the overhanging size of scaffold support and overhanging to be onstructed
The overhanging size of concrete structure is adapted；
Step 3: the construction of the first construction section overhanging concrete structure to be onstructed is carried out；Specific method comprises the following steps that
Step a: the first segment beam bottom scaffold (3) and first segment of the first construction section overhanging concrete structure bottom to be onstructed are set up
Board bottom scaffold (4)；Wherein first segment board bottom scaffold (4) be inclined at it is to be onstructed overhanging concrete structure plate with wait apply
Work overhangs between the main structure (1) below concrete structure；The first segment board bottom scaffold (4) includes bearing diagonal
(4.1), the first horizontal rod (4.2), first longitudinal direction horizon bar (4.3) and the first scissors strut (4.4)；The bearing diagonal
(4.1) bottom end is fixed in main structure (1) frame edge, and the upper end of bearing diagonal (4.1) is inclined outwardly, it is to be onstructed to be supported on
Overhang the bottom of the template die plate of concrete structure；Overhanging concrete structure to be onstructed is arranged in first segment beam bottom scaffold (3)
Between scaffold support below the beam of beam and overhanging concrete structure to be onstructed；
Step b: template die plate and the overhanging to be onstructed of the first construction section for setting up the first construction section overhanging concrete structure to be onstructed are mixed
The beam forms of Xtah Crude Clay structure；
Step c: the board concrete and beam concrete of the first construction section overhanging concrete structure to be onstructed are poured；
Step 4: the pre-buried anchor ring (5) on the side of overhanging concrete structure upper body structure (1) to be onstructed；
Step 5: to the board concrete intensity of the first construction section overhanging concrete structure in step c and the intensity of beam concrete
When reaching design strength, is drawn between the main structure (1) and scaffold support above overhanging concrete structure and set suspension cable
(6), the upper end of suspension cable (6) is fixed on anchor ring (5), and the lower end of suspension cable (6) is connected to the end of scaffold support；
Step 6: supporting element (12) are set between scaffold support and the frame column (11) of main structure (1)；By supporting element
(12) lower end is connected on frame column (11), and the upper end of supporting element (12) is supported on the bottom of scaffold support；
Step 7: the construction of the second construction section overhanging concrete structure to be onstructed is carried out；Specific method comprises the following steps that
Step A: the second segment beam bottom scaffold (7) and second segment of the second construction section overhanging concrete structure bottom to be onstructed are set up
Board bottom scaffold (8)；
The second segment beam bottom scaffold (7) and second segment board bottom scaffold (8) are full hall frame；And second segment beam bottom foot hand
Frame (7) is connect with first segment beam bottom scaffold (3), and second segment board bottom scaffold (8) is connect with first segment board bottom scaffold (4)；
Step B: template die plate and the overhanging to be onstructed of the second construction section for setting up the second construction section overhanging concrete structure to be onstructed are mixed
The beam forms of Xtah Crude Clay structure；
Step C: the board concrete and beam concrete of the second construction section overhanging concrete structure to be onstructed are poured；
Step D: the seam between the first construction section and the second construction section beam concrete is handled, while to the first construction section
And the second seam between construction section board concrete is handled, so far construction finishes.
2. a kind of large cantilever concrete structure section construction method according to claim 1, it is characterised in that: in step 2
Scaffold support include along main structure (1) frame edge parallel interval setting one group of section steel beam (2), be laid on section steel beam
(2) springboard on and the protective net being disposed around below section steel beam (2)；The anchoring section of the section steel beam (2) is located at it by hoop
The U-shaped dowel (9) of top is fixed on main structure (1), and the overhanging section of section steel beam (2) vertically overhangs in main structure (1)
Outside side；The U-shaped dowel (9) is provided with one group, is arranged along the long axis direction parallel interval of section steel beam (2), and U-shaped dowel
(9) two free ends are embedded in the floor of main structure (1)；Section steel beam (2) bottom is equipped with antiskid part (10)；
The antiskid part (10) is correspondingly arranged at the side wall two sides of main structure (1) frame edge, and side wall is stuck in its composition
In groove.
3. a kind of large cantilever concrete structure section construction method according to claim 2, it is characterised in that: step 3 exists
Top, corresponding first segment before setting up first segment beam bottom scaffold (3) and first segment board bottom scaffold (4), in section steel beam (2)
Transversely parallel interval is connected with first segment beam bottom coupling beam (13) at the position of beam bottom scaffold (3), and the first segment beam bottom connects
The top of beam (13) is equipped at intervals with vertical plug-in unit along its long axis direction；Top, corresponding first segment board bottom foot in section steel beam (2)
Transversely parallel interval is connected with first segment board bottom coupling beam (14) at the position of hand cradle (4).
4. a kind of large cantilever concrete structure section construction method according to claim 3, it is characterised in that: described first
Section board bottom scaffold (4) includes bearing diagonal (4.1), the first horizontal rod (4.2), first longitudinal direction horizon bar (4.3) and the
One scissors strut (4.4)；The bottom end of the bearing diagonal (4.1) is fixed in main structure (1) frame edge, bearing diagonal (4.1)
Upper end be inclined outwardly, be supported on it is to be onstructed overhanging concrete structure template die plate bottom；First horizontal rod
(4.2) parallel interval is connected between bearing diagonal (4.1), and the first horizontal rod (4.2) and bearing diagonal (4.1) are in intersection position
Place is connected by cruciform fastening for falsework；First longitudinal direction horizon bar (4.3) parallel interval be connected to the first horizontal rod (4.2) with
Between the intersection point of bearing diagonal (4.1), first longitudinal direction horizon bar (4.3) and the first horizontal rod (4.2) lead at intersection position
Cross cruciform fastening for falsework connection.
5. a kind of large cantilever concrete structure section construction method according to claim 4, it is characterised in that: the oblique branch
Support (4.1) is made of steel pipe；Inclination plug-in unit is equipped at the top of the section steel beam (2), at the link position of corresponding bearing diagonal (4.1),
The bottom end noose of the bearing diagonal (4.1) is on inclination plug-in unit.
6. a kind of large cantilever concrete structure section construction method according to claim 5, it is characterised in that: in step 3
First segment beam bottom scaffold (3) includes the first upright bar (3.1), the second horizontal rod (3.2), second longitudinal direction horizon bar
(3.3) and the second scissors strut (3.4)；The bottom end of first upright bar (3.1) corresponds to noose in first segment beam bottom coupling beam (13)
Top vertical plug-in unit on.
7. a kind of large cantilever concrete structure section construction method according to claim 5 or 6, it is characterised in that: step
Suspension cable described in rapid five (6) has one group, arrangement corresponding with section steel beam (2), and the lower end of suspension cable (6) is connected to section steel beam
(2) overhang the end of section；Before drawing sets suspension cable (6), the overhanging section bottom surface of section steel beam (2) is equipped at end position
The antiskid part (10) for preventing suspension cable (6) mobile.
8. a kind of large cantilever concrete structure section construction method according to claim 7, it is characterised in that: in step 6
The supporting element (12) is connected between section steel beam (2) and the frame column (11) of main structure (1)；The supporting element (12) it is upper
End is supported on the bottom of section steel beam (2).
9. a kind of large cantilever concrete structure section construction method according to claim 8, it is characterised in that: the step
Seven before setting up second segment beam bottom scaffold (7) and second segment board bottom scaffold (8), section steel beam (2) top, corresponding the
Transversely parallel interval is connected with second segment beam bottom coupling beam (15), the second segment beam at the position of one section of beam bottom scaffold (3)
The top of bottom coupling beam (15) is equipped at intervals with vertical plug-in unit along its long axis direction；Top, corresponding second segment plate in section steel beam (2)
Transversely parallel interval is connected with second segment board bottom coupling beam (16) at the position of footing hand cradle (8)；The second segment beam bottom foot hand
Upright bar bottom end in frame (7) corresponds to noose on the vertical plug-in unit at the top of second segment beam bottom coupling beam (15)；The second segment board bottom
Upright bar bottom end in scaffold (8) is supported at the top of the section steel beam (2) of the second construction section.
10. a kind of large cantilever concrete structure section construction method according to claim 8, it is characterised in that: described oblique
Drag-line (6) includes upper oblique pull cable elements, lower suspension cable unit and the flower basket bolt being connected between two skew cables units；
Wherein the lower end of upper oblique pull cable elements is connect with the pull rod on flower basket bolt top, under the upper end and flower basket bolt of lower suspension cable unit
The pull rod in portion connects.
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| CN107999985B (en) * | 2017-12-12 | 2019-12-06 | 中国水利水电第五工程局有限公司 | Ultra-large lower guard plate sectional installation method |
| CN112064799A (en) * | 2020-08-20 | 2020-12-11 | 上海二十冶建设有限公司 | Rapid construction method for sintering engineering batching chamber |
| CN114033223B (en) * | 2021-12-09 | 2023-02-03 | 中建四局第一建设有限公司 | Steel hanging platform under overhanging steel truss of ultrahigh air swimming pool and construction method thereof |
| CN114135065A (en) * | 2021-12-31 | 2022-03-04 | 赵鹏付 | Device for combining prefabrication and cast-in-place of roof cornice structure and construction method thereof |
| CN116201242B (en) * | 2023-05-04 | 2023-09-08 | 中铁建工集团有限公司 | Conversion construction method for ultra-long cantilever structure |
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