CN113931365A - Post-cast strip-free floor system structure and construction method - Google Patents

Post-cast strip-free floor system structure and construction method Download PDF

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Publication number
CN113931365A
CN113931365A CN202111216563.0A CN202111216563A CN113931365A CN 113931365 A CN113931365 A CN 113931365A CN 202111216563 A CN202111216563 A CN 202111216563A CN 113931365 A CN113931365 A CN 113931365A
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CN
China
Prior art keywords
concrete
post
billet
cast strip
floor
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Pending
Application number
CN202111216563.0A
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Chinese (zh)
Inventor
王东升
杨晓慧
王艳兵
唐锂
刘国祥
赵安忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Construction First Group Corp Ltd
Beijing Architectural Design Institute of China Construction Corp Ltd
Original Assignee
China Construction First Group Corp Ltd
Beijing Architectural Design Institute of China Construction Corp Ltd
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Publication date
Application filed by China Construction First Group Corp Ltd, Beijing Architectural Design Institute of China Construction Corp Ltd filed Critical China Construction First Group Corp Ltd
Priority to CN202111216563.0A priority Critical patent/CN113931365A/en
Publication of CN113931365A publication Critical patent/CN113931365A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32Floor structures wholly cast in situ with or without form units or reinforcements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work

Abstract

The utility model relates to a superstructure structure of post-cast strip exempts from belongs to the building engineering field, including the steel reinforcement cage structure and pour the concrete structure in inside with the steel reinforcement cage structure, the inside interval arrangement of concrete structure is provided with the billet that many lead to long setting, the billet transversely sets up, the top surface of billet and concrete structure's surface, the bottom surface of billet is located the top of steel reinforcement cage structure. The application also relates to a construction method of the post-cast-free floor system structure, and the application has the effects of realizing the continuous concrete pouring of the concrete floor system structure during construction and further shortening the construction period of the floor system.

Description

Post-cast strip-free floor system structure and construction method
Technical Field
The application relates to the field of building engineering, in particular to a post-cast-free floor structure and a construction method.
Background
According to the current concrete structure design specifications, for an ultra-long concrete structure, in order to reduce the tensile stress and cracks caused by concrete shrinkage during construction, a post-cast strip is generally arranged or a skip method is adopted for construction.
The post-cast strip has various construction procedures, long time span, large construction difficulty, high cost and difficult quality guarantee. The basic principle of the construction of the chamber jump method and the arrangement of the post-cast strip are the same, the construction and the arrangement of the post-cast strip belong to the ' placing before the placing after the resisting ', the chamber jump method ' is the further development of the post-cast strip method, both the chamber jump method and the post-cast strip have time interval requirements, wherein the post-cast strip generally needs to be left for 45-60 days, and the construction of the chamber jump method requires the interval of 7-10 days, so that the continuous concrete pouring can not be realized.
Disclosure of Invention
In order to realize that concrete is poured continuously when the concrete floor structure is constructed, thereby shortening the construction period of the floor, the application provides a floor structure without a post-cast strip and a construction method.
The application provides a floor structure of exempting from post-cast strip adopts following technical scheme:
the utility model provides a floor structure of exempting from post-cast strip, includes the steel reinforcement cage structure and pours the steel reinforcement cage structure in inside concrete structure, the inside interval arrangement of concrete structure is provided with the billet that many logical lengths set up, the billet transversely sets up, the top surface of billet and concrete structure's surface, the bottom surface of billet is located the top of steel reinforcement cage structure.
By adopting the technical scheme, before the concrete for forming the floor system structure is finally solidified, the through-length steel bars are inserted into the concrete, so that the cross section of the finally formed floor system structure at the position of the steel bars is weakened, when the concrete structure generates cracks due to shrinkage, the weakened position firstly cracks under the action of shrinkage tensile stress, the cracks develop along the steel bars, the direction is parallel to the stress direction of the floor system structure, and the generated cracks are orderly harmless cracks without influencing the bearing capacity of the floor system. The concrete cracks are generated at the positions of the steel bars by guiding, so that the disordered harmful cracks of the concrete structure caused by shrinkage are changed into the ordered harmful cracks.
Optionally, the spacing between adjacent bars is the same and is between 15-20 m.
Through adopting above-mentioned technical scheme, set up the interval between the adjacent billet into same interval to the contraction tensile stress of control superstructure structure that can be better ensures that the superstructure structure is in the position that the billet is located because of the produced crack of the effect of contraction tensile stress.
Optionally, the concrete structure includes a floor slab and a plurality of main beams located on the lower surface of the floor slab, the main beams are arranged at intervals and are parallel to each other, and a plurality of secondary beams are arranged at intervals between adjacent main beams along the length direction of the main beams.
Through adopting above-mentioned technical scheme, can strengthen the structural strength of the superstructure structure of final formation, guarantee the bearing capacity of superstructure structure.
Optionally, the concrete structure is further provided with distribution ribs which are vertically arranged in multiple layers.
Through adopting above-mentioned technical scheme, further increase the bearing capacity of superstructure structure.
Optionally, the top end surface of the concrete structure is further provided with a building surface layer.
Through adopting above-mentioned technical scheme, thereby can protect fashioned superstructure structure through the building surface course, increase superstructure structure's life.
Optionally, the building surface course is a cement paste surface course or a floor brick course.
By adopting the technical scheme, the cement forming the cement paste surface layer and the mortar used for paving the floor brick layer can enter the crack, so that the crack can be repaired.
Optionally, be provided with a plurality of perforating holes that set up along the length direction interval of billet on the billet, the perforating hole is vertical to run through the billet.
Through adopting above-mentioned technical scheme, when inserting the billet inside the concrete, because the concrete is in the final set stage, viscosity is great, and the in-process of inserting the billet, the air can be discharged from the perforating hole on the billet to the air that enters into in the concrete when reducing the billet and inserting inside the concrete.
Optionally, the steel strip is a galvanized steel strip.
By adopting the technical scheme, the galvanized steel strip is adopted, when the steel strip is inserted into concrete, a compact basic zinc carbonate film can be generated on the surface of zinc, and the corrosion speed of a zinc layer can be delayed.
The application provides a construction method of a post-cast strip-free floor system structure, which adopts the following technical scheme:
a construction method of a post-cast-free floor structure comprises the following specific steps:
s1, supporting a template of the floor slab according to a building design drawing, and binding a reinforcement cage structure;
s2, pouring the mixed concrete into the space between the formwork and the steel reinforcement cage structure, and vibrating the concrete poured into the formwork until the concrete is vibrated to be compact;
and S3, before the concrete is finally solidified, inserting a through steel bar into the concrete, and fixing the steel bar in the concrete when the concrete is solidified to form a floor structure.
By adopting the technical scheme, before the concrete for forming the floor system structure is finally solidified, the through-length steel bars are inserted into the concrete, so that the cross section of the finally formed floor system structure at the position of the steel bars is weakened, when the concrete structure generates cracks due to shrinkage, the weakened position firstly cracks under the action of shrinkage tensile stress, the cracks develop along the steel bars, the direction is parallel to the stress direction of the floor system structure, and the generated cracks are orderly harmless cracks without influencing the bearing capacity of the floor system. The concrete cracks are generated at the positions of the steel bars by guiding, so that the disordered harmful cracks of the concrete structure caused by shrinkage are changed into the ordered harmful cracks.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the concrete cracks are generated at the positions of the steel bars by guiding, so that disordered harmful cracks caused by shrinkage of a concrete structure are changed into ordered harmful cracks, a post-cast strip is not required to be arranged, a special construction process is not required, and the concrete is continuously poured;
2. when the steel bar is inserted into the concrete, the concrete is in a final setting stage, the viscosity is high, and in the process of inserting the steel bar, air can be discharged from the through hole in the steel bar, so that the air entering the concrete when the steel bar is inserted into the concrete is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a post-cast strip-free floor structure according to an embodiment of the present disclosure;
figure 2 is a top plan view of a final formed concrete structure of a post-cast-free floor structure according to an embodiment of the present application;
fig. 3 is a bottom view of a final formed concrete structure of a post-cast-free floor structure according to an embodiment of the present application.
Description of reference numerals: 1. a reinforcement cage structure; 2. a concrete structure; 21. a floor slab; 22. a main beam; 23. a secondary beam; 3. a steel bar; 31. a through hole; 4. distributing ribs; 5. and (5) building a surface layer.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a floor structure free of post-cast strip.
Referring to fig. 1 and 2, the post-cast strip-free floor structure comprises a reinforcement cage structure 1 formed by binding reinforcement bars and a concrete structure poured inside the reinforcement cage structure 1. The inside top that lies in concrete structure 2 still is provided with many mutual parallel's billet 3, and the top surface of billet 3 flushes with the top surface of concrete structure 2. The bottom end surfaces of the steel bars 3 are located above the steel reinforcement cage structure 1. The steel strip 3 is a galvanized steel strip. The billet 3 transversely sets up and the length direction of billet 3 sets up along the width direction full length of concrete structure 2. The steel bars 3 are spaced apart from each other along the length of the concrete structure 2.
The distance between two adjacent bars 3 is the same. The distance between two adjacent steel bars 3 is between 15 and 20 m.
The inside that is located concrete structure 2 still is provided with two-layer distribution muscle 4, and in two-layer distribution muscle 4, one deck distribution muscle 4 is located steel reinforcement cage structure 1's lower surface and ties up through the iron wire and fix on steel reinforcement cage structure 1's upper surface, and another layer distribution muscle 4 is located steel reinforcement cage structure 1's lower surface and ties up through the iron wire and fix on steel reinforcement cage structure 1's lower surface.
Referring to fig. 2, a plurality of through holes 31 vertically penetrating the steel rod 3 are provided at intervals along the length direction of the steel rod 3 at the top end surface of the steel rod 3, and the through holes 31 communicate the top end surface and the bottom end surface of the steel rod 3.
When the steel bars 3 are put into the concrete structure 2, the time of putting the steel bars 3 is before the concrete forming the concrete structure 2 is finally set. Since the steel bar 3 is put into the concrete structure 2 before the concrete is finally set, the viscosity of the concrete is highest at this time, and air can be discharged from the inside of the through hole 31 when the steel bar 3 is put into the concrete through the through hole 31 on the steel bar 3.
Referring to fig. 3, the concrete structure 2 includes a floor slab 21 formed by concrete casting. The girders 22 are provided on the lower surface of the floor panel 21 at intervals in the longitudinal direction of the floor panel 21, and the girders 22 are provided so as to extend in the longitudinal direction of the floor panel 21. The main beams 22 are also cast of concrete and are integrally formed with the floor slab 21. And a plurality of secondary beams 23 are arranged between two adjacent main beams 22 at intervals along the length direction of the main beams 22. The secondary beam 23 is connected at one end to one of the main beams 22 and at the other end to the other main beam 22. The secondary beam 23 is also cast by concrete. The secondary beam 23 is integrally formed with the floor panel 21.
The surface of the concrete structure 2 is also provided with a building surface layer 5, and the building surface layer 5 adopts a cement slurry surface layer or a floor brick layer. When the building face 5 is laid, cement paste can enter the formed cracks, and the cracks can be repaired.
The application principle of a floor structure of exempting from post-cast strip of this application embodiment is: by placing the steel bars 3 at the inner top end of the concrete structure 2, a control slit or a guide slit can be formed between the steel bars 3 and the concrete structure 2 when the concrete structure 2 is contracted due to the difference in material between the steel bars 3 and the concrete structure 2. The guided concrete structure 2 is contracted such that the generated cracks are generated between the steel bars 3 and the concrete structure 2, changing the disordered harmful cracks into the ordered harmless cracks.
Due to the presence of the steel bars 3, the thickness of the concrete structure 2 at the location of the steel bars 3 is reduced compared to other locations, so that the cross-section at this location is small, the resistance to tensile stress is reduced, during construction, the weakened location is first cracked under the effect of the tensile stress of contraction, and cracks develop along the steel bars 3. The crack direction of the cracks is parallel to the stress direction of the floor slab, and the cracks are orderly harmless cracks and do not influence the final bearing capacity of the floor slab structure.
When the later building surface course is constructed, cement paste in the building surface course method permeates into cracks near the steel bars 3 to play a repairing role, and then face bricks are pasted or other ground decorating materials are paved, so that the use and the attractiveness are not influenced completely. By adopting the design method of the floor structure, the problem of shrinkage cracks in the construction period of the ultra-long concrete structure is solved, a post-pouring belt is not required to be arranged, and triple benefits of improving the quality, saving the construction period and saving the construction cost can be realized.
The embodiment of the application also discloses a construction method of the post-cast strip-free floor structure, which comprises the following specific steps:
s1, supporting a template of the floor structure according to the building design drawing, and binding a reinforcement cage structure in the space surrounded by the template;
s2, pouring the mixed concrete into the space between the formwork and the steel reinforcement cage structure, and vibrating the concrete poured into the formwork until the concrete is vibrated to be compact;
and S3, before the concrete is finally solidified, inserting steel bars arranged in the through length into the concrete, and fixing the steel bars in the concrete after the concrete is solidified to form a floor structure.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides a floor structure of exempting from post-cast strip which characterized in that: including steel reinforcement cage structure (1) and pour steel reinforcement cage structure (1) concrete structure (2) inside, the inside interval arrangement of concrete structure (2) is provided with billet (3) that many logical lengths set up, billet (3) transversely set up, the top surface of billet (3) and the surface of concrete structure (2), the bottom surface of billet (3) is located the top of steel reinforcement cage structure (1).
2. The post-cast strip-free floor structure as claimed in claim 1, wherein: the spacing between adjacent steel bars (3) is the same and is between 15-20 m.
3. The post-cast strip-free floor structure as claimed in claim 1, wherein: concrete structure (2) are including floor board (21) and be located many girders (22) of floor board (21) lower surface, and the interval sets up and is parallel to each other between adjacent girder (22) between girder (22), is provided with many secondary beam (23) along the length direction interval of girder (22) between adjacent girder (22).
4. The post-cast strip-free floor structure as claimed in claim 1, wherein: the concrete structure (2) is also provided with a plurality of layers of distribution ribs (4) which are vertically arranged.
5. The post-cast strip-free floor structure as claimed in claim 1, wherein: and the top end surface of the concrete structure (2) is also provided with a building surface layer (5).
6. The post-cast strip-free floor structure as claimed in claim 1, wherein: the building surface layer (5) adopts a cement paste surface layer or a floor brick layer.
7. The post-cast strip-free floor structure as claimed in claim 1, wherein: be provided with a plurality of perforating holes (31) that set up along the length direction interval of billet (3) on billet (3), perforating hole (31) are vertical to be run through billet (3).
8. The post-cast strip-free floor structure as claimed in claim 1, wherein: the steel bar (3) is a galvanized steel bar.
9. A construction method of a floor structure without a post-cast strip according to any one of claims 1 to 8, characterized in that: the method comprises the following specific steps:
s1, supporting a template of the floor plate (21) according to a building design drawing, and binding a reinforcement cage structure (1);
s2, pouring the mixed concrete into the space between the formwork and the reinforcement cage structure (1), and vibrating the concrete poured into the formwork until the concrete is vibrated to be compact;
and S3, before the concrete is finally solidified, inserting a through steel bar (3) into the concrete, and fixing the steel bar (3) in the concrete when the concrete is solidified to form a floor structure.
CN202111216563.0A 2021-10-19 2021-10-19 Post-cast strip-free floor system structure and construction method Pending CN113931365A (en)

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Application Number Priority Date Filing Date Title
CN202111216563.0A CN113931365A (en) 2021-10-19 2021-10-19 Post-cast strip-free floor system structure and construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111216563.0A CN113931365A (en) 2021-10-19 2021-10-19 Post-cast strip-free floor system structure and construction method

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CN113931365A true CN113931365A (en) 2022-01-14

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008184736A (en) * 2007-01-26 2008-08-14 Takenaka Komuten Co Ltd Construction method for crack inducing joint structure
CN105863088A (en) * 2016-06-06 2016-08-17 山东万鑫建设有限公司 Super-long floor concrete post-pouring seam design and construction process
CN208518074U (en) * 2018-06-08 2019-02-19 杨众 Pretensioned prestressing integral precast structure
CN110552431A (en) * 2019-09-06 2019-12-10 中国一冶集团有限公司 Induced joint structure for basement crack control and construction method
CN111648411A (en) * 2020-05-06 2020-09-11 上海建工二建集团有限公司 Downward-turning type post-cast strip support replacing structure, construction method and post-cast strip construction method
CN111663695A (en) * 2020-06-30 2020-09-15 江苏智信达建筑科技有限公司 Assembly type template-free box-type floor system and construction process thereof
CN211774666U (en) * 2019-11-18 2020-10-27 上海东方雨虹防水技术有限责任公司 Concrete wall body induced joint construction structures

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008184736A (en) * 2007-01-26 2008-08-14 Takenaka Komuten Co Ltd Construction method for crack inducing joint structure
CN105863088A (en) * 2016-06-06 2016-08-17 山东万鑫建设有限公司 Super-long floor concrete post-pouring seam design and construction process
CN208518074U (en) * 2018-06-08 2019-02-19 杨众 Pretensioned prestressing integral precast structure
CN110552431A (en) * 2019-09-06 2019-12-10 中国一冶集团有限公司 Induced joint structure for basement crack control and construction method
CN211774666U (en) * 2019-11-18 2020-10-27 上海东方雨虹防水技术有限责任公司 Concrete wall body induced joint construction structures
CN111648411A (en) * 2020-05-06 2020-09-11 上海建工二建集团有限公司 Downward-turning type post-cast strip support replacing structure, construction method and post-cast strip construction method
CN111663695A (en) * 2020-06-30 2020-09-15 江苏智信达建筑科技有限公司 Assembly type template-free box-type floor system and construction process thereof

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Application publication date: 20220114

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