CN116104302A - Construction method of belt-shaped channel disc buckle type supporting and assembling early-dismantling formwork keel system - Google Patents

Construction method of belt-shaped channel disc buckle type supporting and assembling early-dismantling formwork keel system Download PDF

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Publication number
CN116104302A
CN116104302A CN202310268582.0A CN202310268582A CN116104302A CN 116104302 A CN116104302 A CN 116104302A CN 202310268582 A CN202310268582 A CN 202310268582A CN 116104302 A CN116104302 A CN 116104302A
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China
Prior art keywords
template
early
dismantling
plate
rod
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CN202310268582.0A
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Chinese (zh)
Inventor
江林
陈海军
江升
朱久华
徐笛
朱志钢
施磊
李培培
刘小虎
江婷婷
闵悦
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Langhui Technology Group Co ltd
Zhongru Construction Group Co ltd
Nantong Vocational College
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Langhui Technology Group Co ltd
Zhongru Construction Group Co ltd
Nantong Vocational College
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Priority to CN202310268582.0A priority Critical patent/CN116104302A/en
Publication of CN116104302A publication Critical patent/CN116104302A/en
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • E04G11/483—Supporting heads
    • 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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
    • 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
    • E04G19/00—Auxiliary treatment of forms, e.g. dismantling; Cleaning devices
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/18—Adjusting tools; Templates
    • E04G21/1841—Means for positioning building parts or elements
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
    • E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
    • 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
    • E04G25/00—Shores or struts; Chocks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

The invention relates to a construction method of a belt-shaped channel plate buckle type supporting and assembling early-dismantling formwork keel system, which is characterized by comprising the following steps of: comprising S1: measuring and paying off; s2: installing a supporting system; s3: early-dismantling adjustable support installation; s4: the main beam, the secondary beam and the plate template are installed and accepted by a supporting system; s5: installing and checking a plate template; s6: installing and checking the reinforcing steel bars; s7: pouring and curing concrete; s8: removing the template and the support; the disc buckle supporting system is optimally arranged, so that the performance advantage of the disc buckle frame is exerted to the maximum extent; the support system is erected by adopting a socket type disc buckle type steel pipe support, so that the arrangement is flexible, safe and reliable; the space between the vertical rods below the beam and the plate is increased, so that a construction channel without horizontal rods and diagonal rods is formed in the support frame, and the formwork in the early-dismantling system is convenient to dismantle, the personnel walk and the material is convenient to transport; the channel steel main beam, the square wood beam and the template of the slab early-dismantling system and the rear-dismantling slab band system are prefabricated and formed in advance respectively, and the complete template keel system is assembled on site, so that the material and labor and time are saved.

Description

Construction method of belt-shaped channel disc buckle type supporting and assembling early-dismantling formwork keel system
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a construction method of a strip-shaped channel plate buckle type supporting and assembling early-dismantling formwork keel system.
Background
Currently, the characteristics of buildings such as urban underground squares, markets, parking garages and the like are generally large-span cast-in-place concrete frame structure systems. In the actual construction process, the disc buckle type supporting system is found to not fully exert the bearing capacity of the vertical rod, and the current conventional disc buckle construction technology in site only actually exerts the bearing capacity of the vertical rod by 35% -55%, so that huge waste of technical resources of the bearing capacity of the vertical rod is caused; in addition, the current on-site frame body is provided with a plurality of horizontal rods and diagonal rods in the longitudinal and transverse directions, so that the transportation of materials, the operation and the walking of personnel are very inconvenient in construction; in addition, the conventional construction of the templates and the keels adopts a scattered supporting and scattered disassembling method, so that the engineering quantity is heavy, and the labor and the time are wasted.
In order to solve the defects, a construction method of the belt-shaped channel disc buckle type supporting and assembling type early-dismantling formwork keel system needs to be developed.
The construction method of the belt-shaped channel disc buckle type support and assembly type early-dismantling formwork keel system is a novel support system, and once the novel support system is pushed out, the current building construction industry is overturned, and the formwork support system saves about 1/5-1/4 of the cost through measurement and calculation of engineering small-scale application. The construction template support frame accounts for 4% -6% of the total construction cost, and the method can reduce the total construction cost by 0.8% -1.5%, so that the method has extremely remarkable economic benefit and extremely important significance for technical transformation, cost reduction, synergy and transformation and upgrading in the construction industry.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method of a belt-shaped channel disc buckle type supporting and assembling type early-dismantling formwork keel system, which can solve the problems in the background technology.
In order to solve the technical problems, the technical scheme of the invention is as follows: the construction method of the belt-shaped channel disc buckle type supporting and assembling type early-dismantling formwork keel system has the innovation points that: the concrete support construction method comprises the following steps:
s1: and (3) measuring and paying off: ejecting a longitudinal positioning line and a transverse positioning line of the vertical rod center of the frame body on the base layer, placing the vertical rods at the crossing points of the longitudinal line and the transverse line, and leveling the base layer with the flatness which does not meet the requirement; according to the structural elevation, determining the initial height of the adjustable base nut, wherein the center line of the horizontal rod at the bottommost layer is not more than 550mm away from the bottom plate of the adjustable base;
s2: and (3) mounting a support system:
s2.1: and (3) selecting a frame: the height-width ratio of the independent tower and the adjusting span supporting area is preferably controlled within 3, and the adjusting span is horizontally connected by adopting a fastener type steel pipe;
s2.2: the tray buckle supporting frame body is erected:
s2.21: and (3) vertical rod installation: the two adjacent upright posts are of different length specifications, or the connecting sleeves of the adjacent upright posts are reversed and staggered, so that the upright post socket joint connectors are not in the same horizontal plane, and the staggered length of the connectors is more than 500mm; firstly, installing a first-layer upright rod, and after the first-layer frame body is corrected and molded, lengthening and installing the upright rod;
s2.22: horizontal bar installation: the cross rod and the vertical rod are matched and installed simultaneously, when the cross rod is installed, the cross rod bolt is not easy to knock down first, and the cross rod is installed layer by layer along with the extension of the vertical rod; the horizontal rod is limited to 300/600mm combination, and is suitable for the design of the frame bodies with different beam widths;
s2.23: and (3) oblique rod installation: after the horizontal adjustment of the frame body is finished, the inclined rod can be installed, and a triangular stress system is formed by the inclined rod, the vertical rod and the cross rod during the installation of the inclined rod; after the inclined rod is installed, hammers are used for hammering the cross rods and the inclined rod bolts one by one, and the bolt tightening degree is based on the bolt scale marks;
s2.24: and (5) peripheral drawknot: the vertical structure and the horizontal structure are poured as far as possible separately, so that the vertical structure and the horizontal structure are connected with the support frame body to form a reliable whole; when the independent towers and the adjusting span combination form are erected to form a supporting frame, phi 48 multiplied by 2.8 steel pipes are adopted to be horizontally tied with the adjacent independent towers along the height interval of 2-4 steps, so that the problem that the disc buckle horizontal rod does not match with the dimension modulus of the building axis is solved;
s3: early-dismantling adjustable support installation: after the frame body is installed, the double-nut early-dismantling head is inserted into the top of the vertical rod, and the depth is not less than 150mm; the jacking is enabled to be lower than the elevation of the bottom of the structure by one time of the thickness of the template through adjusting the nut, and the error is controlled within 5 mm;
s4: and (3) main beam, secondary beam and plate template installation and support system acceptance: liang Zhuleng adopts phi 48 multiplied by 2.8 double steel pipes, the minor edges adopt three 10# channel steel beam bottoms which are uniformly distributed, and the template adopts a 12mm multilayer plate; the main plate edge adopts a 10# channel steel, the secondary edge adopts 40X 90 battens, the middle distance is less than or equal to 200mm, and the template adopts a 12mm multilayer plate; after the installation of the primary beam, the secondary beam and the plate template is finished, related personnel are required to be organized for acceptance, and after the acceptance is qualified, the beam and the plate template can be installed;
s5: and (5) installing and checking a plate template: designing a template layout diagram of the board according to the arrangement of the independent tower frames; each upright post is provided with a small square loose-leaf template at the top of the adjustable support in an early-dismantling way, and a cut non-whole template is arranged between the small square loose-leaf templates at the top of the support; the whole plate template belt is arranged outside the non-whole multi-layer template, so that the template is prevented from being cut and wasted at will; and respectively prefabricating and forming the channel steel main beam, the square timber beam and the template of the plate early-dismantling system and the rear-dismantling plate-strip system in advance, and installing the complete template keel system in an on-site assembly mode. After the template is installed, the supervision is required to be informed to check and accept the template and the supporting system, and the steel bar can be installed after the checking and accepting are completed;
s6: and (3) installing and checking and accepting the reinforcing steel bars: installing the steel bars according to the construction drawing, wherein the specification and model of the steel bars meet the drawing requirements, and the anchoring and connecting requirements of the steel bars meet the specification requirements; the steel bars are not required to be piled on the templates, and the steel bars need to be hung and used at any time; after the construction of the steel bar is finished, checking and accepting are needed, after the self-checking is finished, notifying a supervision unit of checking and accepting, and after the checking and accepting are qualified, concrete pouring can be carried out;
s7: and (3) pouring and curing concrete: in the pouring process, the vertical components are poured in advance, the horizontal components are balanced in balance during pouring, and the beam slab concrete is poured from one side to the other side and continuously goes forward; when pouring, the cloth is not required to be continuously distributed at the same position, the cloth is required to be horizontally moved within the range of 2-3m and is vertical to the template; the thickness of the virtual pavement of the cast slab concrete is larger than the thickness of the slab, and the thickness of the virtual pavement is not more than 50% of the thickness of the slab; after concrete pouring is completed, sprinkling and covering maintenance are carried out in time;
s8: and (5) removing the template and the support:
s8.1: and (3) removing the template: when the strength of the concrete can ensure that the surface and the edges and corners of the concrete are not damaged, the side dies of the primary and secondary beams can be dismantled; after the strength of the slab concrete reaches 50% of the design strength, the non-whole slab band template and the keel template system of the whole slab band template are dismantled; the small square loose-leaf templates which are arranged on the adjustable supports and are arranged on the vertical rods in a propping way cannot be removed in advance and are required to be removed together with the vertical rods;
in the early dismantling process, the upright rod, the adjustable jacking and the small square loose-leaf templates at the top of the adjustable jacking are not affected, and the structure is always supported; when the double-nut early-dismantling head upper nut is rotated, the U-shaped support is lowered by about 5cm, and when the U-shaped support is loosened and the template can fall off, the complete template keel system of the plate early-dismantling system is dismantled in sequence; then the connecting cross bars and diagonal bars among the units can be removed, and finally the supporting units are reserved;
s8.2: and (3) dismantling a support system: after the early disassembly, the remained upright rods and the double nuts are disassembled early, and the remained upright rods and the double nuts are disassembled when the strength of the concrete reaches the normal form-disassembling condition; the detachment should follow the principles of first detachment, later detachment, upper detachment, and lower detachment.
Further, in the S1 measurement pay-off: when the bearing capacity is large, the upper part of the bearing plate is dispersed to transfer force, and the bearing plate is flat and has no warpage, so that the cracked bearing plate cannot be adopted.
Further, in the S5 plate template installation and acceptance: the templates adopt 915 x 1830 and 280 x 1830 specifications.
The invention has the advantages that:
1, arranging a plate buckle supporting system, calculating and analyzing an optimal performance technical parameter table of a corresponding plate and a beam through an optimized frame body scheme, and maximally exerting the performance advantage of the plate buckle frame; the support system is mainly made of socket-and-spigot type disc buckle type steel pipe supports, and double-nut early-dismantling heads are arranged at the tops of the vertical rods, so that the support system has the characteristics of flexible arrangement, safety, reliability, convenience and rapidness in construction; the beam-slab independent tower and the adjusting span are optimally combined, the characteristic of high upright rod strength is fully utilized, the distance between the upright rods below the beam and the slab can reach 1.8m, so that a construction channel without horizontal rods and inclined rods is formed in the support frame, and the formwork is convenient to dismantle, walk, operate and transport materials in an early-dismantling system.
2, the turnover efficiency of the templates and the battens is high, the horizontal support template dismantling rate of the plates can reach 100%, and the side dies of the primary and secondary beams can be completely dismantled, so that the turnover efficiency of turnover materials is improved; the investment of consumed materials such as templates and the like and turnover materials is reduced, so that the cost is reduced and the construction period is shortened; according to the load size of the beam, the number of the beam bottom vertical rods is calculated, the horizontal rods are limited to 300/600mm combination, reasonable stress setting of the beam bottom vertical rods can be facilitated, and the bearing energy efficiency of the beam bottom supporting vertical rods is fully exerted.
In the invention, the 10-number channel steel is adopted to replace the traditional steel pipe and wood Fang Beileng, and the channel steel main beam, the wood secondary beam and the template of the plate early-dismantling system and the plate and strip-dismantling system are respectively prefabricated and formed in advance, and the complete template keel system is assembled on site; the longitudinal and transverse intervals of the vertical rods are enlarged, and the single-direction consumption of the vertical rods, the horizontal rods and the diagonal rods of the frame body can be greatly reduced; in reality, because the axis dimension of the design of the frame structure drawing and the modulus of the horizontal rod of the disc buckle are generally not multiplied, an adjusting span is naturally formed between beams, the adjusting span between beam supports is fully utilized, a support frame system is divided into a plurality of independent tower type assemblies, and an independent tower type combined support system is adopted, so that the lower support of a frame body plate forms a construction channel of a strip-shaped horizontal rod and an inclined rod, the engineering quantity of the lower support frame body erection can be reduced, the advantages of material transportation, operation and personnel walking are facilitated, meanwhile, the early-dismantling adjustable support is utilized, the template, the batten and the channel steel of the plate are dismantled in advance, the turnover times of the template, the batten and the channel steel are increased, and the cost targets of turnover material and labor are saved.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a flow chart of a construction method of a belt channel disc buckle type supporting and assembling type early-dismantling formwork keel system.
Fig. 2 is a cross-sectional view of an independent tower support of a method of construction of a strap-on channel disc buckle support and assembly type early-dismantling formwork keel system of the present invention.
Fig. 3 is a construction diagram of an early detachable supportable structure of a construction method of a belt channel disc buckle type supporting and assembling early detachable formwork keel system.
Fig. 4 to 6 are main beam, secondary beam and plate template installation diagrams of a construction method of a belt channel disc buckle type supporting and assembling type early-dismantling template keel system.
Fig. 7 is a plan view of a panel early-dismantling support system of a construction method of a panel-buckle type support and assembly early-dismantling formwork keel system of a belt-shaped channel of the invention.
FIG. 8 is a plan view of an independent tower support for a method of construction of a strap-on channel tray-fastened support and fabricated early-dismantling formwork keel system of the present invention.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The construction method of the belt channel disc buckle type supporting and assembling type early-dismantling formwork keel system shown in fig. 1 to 8 comprises the following steps:
s1: and (3) measuring and paying off: ejecting a longitudinal positioning line and a transverse positioning line of the vertical rod center of the frame body on the base layer, placing the vertical rods at the crossing points of the longitudinal line and the transverse line, and leveling the base layer with the flatness which does not meet the requirement; according to the structural elevation, the initial height of the adjustable base nut is determined, and the center line of the horizontal rod at the bottommost layer is not more than 550mm away from the bottom plate of the adjustable base.
S2: and (3) mounting a support system:
s2.1: and (3) selecting a frame: the height-width ratio of the independent tower and the adjusting span combined supporting area is preferably controlled within 3, and the adjusting span is horizontally connected by adopting a fastener type steel pipe.
S2.2: the tray buckle supporting frame body is erected:
s2.21: and (3) vertical rod installation: the two adjacent upright posts are of different length specifications, or the connecting sleeves of the adjacent upright posts are reversed and staggered, so that the upright post socket joint connectors are not in the same horizontal plane, and the staggered length of the connectors is more than 500mm; firstly, installing a first-layer vertical rod, and after the first-layer frame body is corrected and molded, performing vertical rod lengthening installation.
S2.22: horizontal bar installation: the cross rod and the vertical rod are matched and installed simultaneously, when the cross rod is installed, the cross rod bolt is not easy to knock down first, and the cross rod is installed layer by layer along with the extension of the vertical rod; the horizontal rods are used under the beams to limit the combination to 300/600mm, so that the frame is suitable for the design of frames with different beam widths.
S2.23: and (3) oblique rod installation: after the horizontal adjustment of the frame body is finished, the inclined rod can be installed, and a triangular stress system is formed by the inclined rod, the vertical rod and the cross rod during the installation of the inclined rod; after the inclined rod is installed, hammers are used for hammering the cross rods and the inclined rod bolts one by one, and the bolt tightening degree is based on the bolt scale marks.
S2.24: and (5) peripheral drawknot: the vertical structure and the horizontal structure are poured as far as possible separately, so that the vertical structure and the horizontal structure are connected with the support frame body to form a reliable whole; when the independent towers and the adjusting span are combined to build the supporting frame, the supporting frames are horizontally tied with the adjacent independent towers along the height interval of 2-4 steps.
S3: early-dismantling adjustable support installation: after the frame body is installed, the double-nut early-dismantling head is inserted into the top of the vertical rod, and the depth is not less than 150mm; through adjusting the nut, make the jacking be less than structure bottom elevation one time template thickness, error control is within 5 mm.
S4: and (3) main beam, secondary beam and plate template installation and support system acceptance: liang Zhuleng adopts phi 48 multiplied by 2.8 double steel pipes, the minor edges adopt three 10# channel steel beam bottoms which are uniformly distributed, and the template adopts a 12mm multilayer plate; the main beam and the secondary beam are assembled by organizing related personnel for acceptance after the installation of the main beam, the secondary beam and the plate template is completed, and the beam and the plate template can be assembled after the acceptance is qualified.
S5: and (5) installing and checking a plate template: designing a template layout diagram of the board according to the arrangement of the independent tower frames; each upright post is provided with a small square loose-leaf template at the top of the adjustable support in an early-dismantling way, and a cut non-whole template is arranged between the small square loose-leaf templates at the top of the support; the whole plate template belt is arranged outside the non-whole multi-layer template, so that the waste phenomenon of random cutting of the template is avoided; and respectively prefabricating and forming the channel steel main beam, the square timber beam and the template of the plate early-dismantling system and the rear-dismantling plate-strip system in advance, and installing the complete template keel system in an on-site assembly mode. After the template is installed, the supervision is required to be informed to check and accept the template and the supporting system, and the reinforcing steel bar can be installed after the checking and accepting are completed.
S6: and (3) installing and checking and accepting the reinforcing steel bars: installing the steel bars according to the construction drawing, wherein the specification and model of the steel bars meet the drawing requirements, and the anchoring and connecting requirements of the steel bars meet the specification requirements; the steel bars are not required to be piled on the templates, and the steel bars need to be hung and used at any time; after the construction of the steel bar is finished, checking and accepting are needed, after the self-checking is finished, a supervision unit is informed of checking and accepting, and concrete pouring can be carried out after the checking and accepting are qualified.
S7: and (3) pouring and curing concrete: in the pouring process, the vertical components are poured in advance, the horizontal components are balanced in balance during pouring, and the beam slab concrete is poured from one side to the other side and continuously goes forward; when pouring, the cloth is not required to be continuously distributed at the same position, the cloth is required to be horizontally moved within the range of 2-3m and is vertical to the template; the thickness of the virtual pavement of the cast slab concrete is larger than the thickness of the slab, and the thickness of the virtual pavement is not more than 50% of the thickness of the slab; and after concrete pouring is completed, sprinkling and covering maintenance are timely carried out.
S8: and (5) removing the template and the support:
s8.1: and (3) removing the template: when the strength of the concrete can ensure that the surface and the edges and corners of the concrete are not damaged, the side dies of the primary and secondary beams can be dismantled; after the strength of the slab concrete reaches 50% of the design strength, the non-whole slab band template and the keel template system of the whole slab band template are dismantled; the small square loose-leaf templates which are arranged on the adjustable supports and are dismounted in advance by the vertical rods in an early-dismantling mode cannot be dismounted in advance, and the small square loose-leaf templates are dismounted together with the vertical rods.
In the early dismantling process, the upright rod, the adjustable jacking and the small square loose-leaf templates at the top of the adjustable jacking are not affected, and the structure is always supported; when the double-nut early-dismantling head upper nut is rotated, the U-shaped support is lowered by about 5cm, and when the U-shaped support is loosened and the template can fall off, the complete template keel system of the plate early-dismantling system is dismantled in sequence; the connecting rails and diagonal bars between the units can then be removed, leaving the individual support units in place.
S8.2: and (3) dismantling a support system: after the early disassembly, the remained upright rods and the double nuts are disassembled early, and the remained upright rods and the double nuts are disassembled when the strength of the concrete reaches the normal form-disassembling condition; the detachment should follow the principles of first detachment, later detachment, upper detachment, and lower detachment.
S1, in the measurement paying-off process: when the bearing capacity is large, the upper part of the bearing plate is dispersed to transfer force, and the bearing plate is flat and has no warpage, so that the cracked bearing plate cannot be adopted.
S5, in the installation and acceptance of the plate template: the templates adopt 915 x 1830 and 280 x 1830 specifications.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (3)

1. A construction method of a belt channel disc buckle type supporting and assembling type early-dismantling formwork keel system is characterized by comprising the following steps of: the concrete support construction method comprises the following steps:
s1: and (3) measuring and paying off: ejecting a longitudinal positioning line and a transverse positioning line of the vertical rod center of the frame body on the base layer, placing the vertical rods at the crossing points of the longitudinal line and the transverse line, and leveling the base layer with the flatness which does not meet the requirement; according to the structural elevation, determining the initial height of the adjustable base nut, wherein the center line of the horizontal rod at the bottommost layer is not more than 550mm away from the bottom plate of the adjustable base;
s2: and (3) mounting a support system:
s2.1: and (3) selecting a frame: the height-width ratio of the independent tower and the adjusting span combined supporting area is preferably controlled within 3, and the adjusting span is horizontally connected by adopting a fastener type steel pipe;
s2.2: the tray buckle supporting frame body is erected:
s2.21: and (3) vertical rod installation: the two adjacent upright posts are of different length specifications, or the connecting sleeves of the adjacent upright posts are reversed and staggered, so that the upright post socket joint connectors are not in the same horizontal plane, and the staggered length of the connectors is more than 500mm; firstly, installing a first-layer upright rod, and after the first-layer frame body is corrected and molded, lengthening and installing the upright rod;
s2.22: horizontal bar installation: the cross rod and the vertical rod are matched and installed simultaneously, when the cross rod is installed, the cross rod bolt is not easy to knock down first, and the cross rod is installed layer by layer along with the extension of the vertical rod; the horizontal rod is limited to 300/600mm combination, and is suitable for the design of the frame bodies with different beam widths;
s2.23: and (3) oblique rod installation: after the horizontal adjustment of the frame body is finished, the inclined rod can be installed, and a triangular stress system is formed by the inclined rod, the vertical rod and the cross rod during the installation of the inclined rod; after the inclined rod is installed, hammers are used for hammering the cross rods and the inclined rod bolts one by one, and the bolt tightening degree is based on the bolt scale marks;
s2.24: and (5) peripheral drawknot: the vertical structure and the horizontal structure are poured as far as possible separately, so that the vertical structure and the horizontal structure are connected with the support frame body to form a reliable whole; when the independent towers and the adjusting span combination form are used for erecting the supporting frame, phi 48 multiplied by 2.8 steel pipes are adopted to be horizontally tied with the adjacent independent towers along the height interval of 2-4 steps, so that the problem that the disc buckle fixed-length horizontal rod does not match with the dimension modulus of the building axis is solved;
s3: early-dismantling adjustable support installation: after the frame body is installed, the double-nut early-dismantling head is inserted into the top of the vertical rod, and the depth is not less than 150mm; the jacking is enabled to be lower than the elevation of the bottom of the structure by one time of the thickness of the template through adjusting the nut, and the error is controlled within 5 mm;
s4: and (3) main beam, secondary beam and plate template installation and support system acceptance: liang Zhuleng adopts phi 48 multiplied by 2.8 double steel pipes, the minor edges adopt three 10# channel steel beam bottoms which are uniformly distributed, and the template adopts a 12mm multilayer plate; the main plate edge adopts a 10# channel steel, the secondary edge adopts 40X 90 battens, the middle distance is less than or equal to 200mm, and the template adopts a 12mm multilayer plate; after the installation of the primary beam, the secondary beam and the plate template is finished, related personnel are required to be organized for acceptance, and after the acceptance is qualified, the beam and the plate template can be installed;
s5: and (5) installing and checking a plate template: designing a template layout diagram of the board according to the arrangement of the independent tower frames; each upright post is provided with a small square loose-leaf template at the top of the adjustable support in an early-dismantling way, and a cut non-whole template is arranged between the small square loose-leaf templates at the top of the support; the whole plate template belt is arranged outside the non-whole multi-layer template, so that the template is prevented from being cut and wasted at will; and respectively prefabricating and forming the channel steel main beam, the square timber beam and the template of the plate early-dismantling system and the rear-dismantling plate-strip system in advance, and installing the complete template keel system in an on-site assembly mode. After the template is installed, the supervision is required to be informed to check and accept the template and the supporting system, and the steel bar can be installed after the checking and accepting are completed;
s6: and (3) installing and checking and accepting the reinforcing steel bars: installing the steel bars according to the construction drawing, wherein the specification and model of the steel bars meet the drawing requirements, and the anchoring and connecting requirements of the steel bars meet the specification requirements; the steel bars are not required to be piled on the templates, and the steel bars need to be hung and used at any time; after the construction of the steel bar is finished, checking and accepting are needed, after the self-checking is finished, notifying a supervision unit of checking and accepting, and after the checking and accepting are qualified, concrete pouring can be carried out;
s7: and (3) pouring and curing concrete: in the pouring process, the vertical components are poured in advance, the horizontal components are balanced in balance during pouring, and the beam slab concrete is poured from one side to the other side and continuously goes forward; when pouring, the cloth is not required to be continuously distributed at the same position, the cloth is required to be horizontally moved within the range of 2-3m and is vertical to the template; the thickness of the virtual pavement of the cast slab concrete is larger than the thickness of the slab, and the thickness of the virtual pavement is not more than 50% of the thickness of the slab; after concrete pouring is completed, sprinkling and covering maintenance are carried out in time;
s8: and (5) removing the template and the support:
s8.1: and (3) removing the template: when the strength of the concrete can ensure that the surface and the edges and corners of the concrete are not damaged, the side dies of the primary and secondary beams can be dismantled; after the strength of the slab concrete reaches 50% of the design strength, the non-whole slab band template and the keel template system of the whole slab band template are dismantled; the small square loose-leaf templates which are arranged on the adjustable supports and are arranged on the vertical rods in a propping way cannot be removed in advance and are required to be removed together with the vertical rods;
in the early dismantling process, the upright rod, the adjustable jacking and the small square loose-leaf templates at the top of the adjustable jacking are not affected, and the structure is always supported; when the double-nut early-dismantling head upper nut is dismantled, the U-shaped support is lowered by about 5cm, and when the U-shaped support is loosened and the template can fall off, the complete template keel system of the plate early-dismantling system is completely dismantled in sequence to realize a large-range early-dismantling template keel system; then the connecting cross bars and diagonal bars among the units can be removed, and finally the supporting units are reserved;
s8.2: and (3) dismantling a support system: after the early disassembly, the remained upright rods and the double nuts are disassembled early, and the remained upright rods and the double nuts are disassembled when the strength of the concrete reaches the normal form-disassembling condition; the detachment should follow the principles of first detachment, later detachment, upper detachment, and lower detachment.
2. The construction method of the strip channel plate buckle type supporting and assembling type early-dismantling formwork keel system, which is characterized by comprising the following steps of: in the S1 measurement paying-off process: when the bearing capacity is large, the upper part of the bearing plate is dispersed to transfer force, and the bearing plate is flat and has no warpage, so that the cracked bearing plate cannot be adopted.
3. The construction method of the strip channel plate buckle type supporting and assembling type early-dismantling formwork keel system, which is characterized by comprising the following steps of: and in the S5 plate template installation and acceptance: the templates adopt 915 x 1830 and 280 x 1830 specifications.
CN202310268582.0A 2023-03-20 2023-03-20 Construction method of belt-shaped channel disc buckle type supporting and assembling early-dismantling formwork keel system Withdrawn CN116104302A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117386128A (en) * 2023-09-28 2024-01-12 上海宝冶集团有限公司 Construction method of post-pouring strip top plate formwork support quick-dismantling system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117386128A (en) * 2023-09-28 2024-01-12 上海宝冶集团有限公司 Construction method of post-pouring strip top plate formwork support quick-dismantling system

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Application publication date: 20230512