CN2459379Y - Large span no-adhesive prestressed in-situ hollow slab - Google Patents

Large span no-adhesive prestressed in-situ hollow slab Download PDF

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Publication number
CN2459379Y
CN2459379Y CN 00264800 CN00264800U CN2459379Y CN 2459379 Y CN2459379 Y CN 2459379Y CN 00264800 CN00264800 CN 00264800 CN 00264800 U CN00264800 U CN 00264800U CN 2459379 Y CN2459379 Y CN 2459379Y
Authority
CN
China
Prior art keywords
hollow
prestressing
span
cast
hollow slab
Prior art date
Application number
CN 00264800
Other languages
Chinese (zh)
Inventor
仝为民
崔博
钱英欣
张然
Original Assignee
北京市建筑工程研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京市建筑工程研究院 filed Critical 北京市建筑工程研究院
Priority to CN 00264800 priority Critical patent/CN2459379Y/en
Application granted granted Critical
Publication of CN2459379Y publication Critical patent/CN2459379Y/en

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Abstract

The utility model discloses a large span prestressed cast-in-situ hollow slab without adhesion, which is composed of an upper and a lower concrete surface layers, a reinforcement net piece of an upper surface layer, a reinforcement net piece of a lower surface layer, erection bars and hollow pipes, wherein, the prefabricated thin wall hollow pipes are fixed at intervals between the reinforcement net pieces of the upper and the lower layers; the interval positions of the hollow pipes are provided with prestressed bars without adhesion in a curve form to form the structure of a prestressed cast-in-situ hollow slab without adhesion. By the structure, the span of the hollow slab can reach 20 meters, and the problems of the relief of the self weight of a fabric structure and the requirements for indoor space are solved effectively.

Description

A kind of large span prestressing without bondn cast-in-place hollow slab

The utility model belongs to the building floor technical field.

Present cast-in-situ concrete solid floor is a structure below 8 meters can be used for span under the common loading status, when span during greater than 8 meters, generally adopts the form of structure of unbonded prestressed concrete plate.When floor span during greater than 12 meters, the thickness of plate will increase, and the ratio that focuses on certainly in the load of this model will strengthen, and the quantity of reinforcement of plate and vertical structure is increased, and is therefore very uneconomical.In addition, when the span of plate surpasses 12 meters, the form of structure that adopts multi-ribbed plate is arranged also, but multi-ribbed plate need be used plastic form owing to ribbing during construction, and form cost not only increases, the thickness of plate increases too, and the following of plate generally all need furred ceiling, so the floor height of building can be influenced.

The purpose of this utility model is very to the deficiency of above-mentioned floor, a kind of floor of large span prestressing without bondn cast-in-place hollow structure is provided, this plate is in performance cast-in-place prestressed slab advantage, do not increase the deadweight of floor, make the span of plate can reach 20 meters, have excellent economy and applicability.

The utility model is realized in such a way.During construction, prefabricated thin-wall hollow pipe is arranged on cast-in-situ floor up and down in the middle of the reinforcing bar according to certain intervals, and it is fixed.At hollow section part configuration unbonded prestressing tendon at interval, fluid concrete and form the cast-in-place hollow prestressed concrete floor slab subsequently.This floor satisfies the requirement of structural seismic, is applicable to highrise building.This floor can alleviate dead load because of having adopted the form of structure of thin-wall hollow pipe and prestressing without bondn combination, is fit to the use of the cast-in-situ concrete plated construction of large span.This floor not only easy construction is quick, and helps the sound isolation of floor insulation, also can reserve the hole according to instructions for use.

Below in conjunction with accompanying drawing the utility model is described further.Fig. 1 is the utility model cross-sectional configuration schematic diagram.With reference to accompanying drawing, surface layer reinforced mesh (4), bearing rod (5) and hollow section (6) constitute the utility model down by surface layer (2), upper layer reinforced mesh (3) under the concrete upper layer (1).Between the floor levels reinforced mesh according to the fixing prefabricated thin-wall hollow section (6) of certain intervals.Unbonded prestressing tendon (7) is prepared with curve form in the interval of hollow section (6), forms prestressing without bondn cast-in-place hollow plated construction.The thin-walled hollow tube material can be regenerated plastics pipe, thin wall cement pipe or paper core.Unbonded prestressing tendon (7) can be divided into unidirectional and bidirectional arrangements according to the structure stress situation.Unbonded prestressing tendon (7) material can be divided into un-bonded prestressed steel strand and adhesive-less prestress steel tow.Hollow section (6) will be fixedlyed connected with template when being provided with.This plate can be reserved the hole according to instructions for use in manufacturing process.

The utility model in use can alleviate dead load, is fit to the use of the cast-in-situ concrete plated construction of large span.This plate makes the span of plate reach 20 meters in performance cast-in-place prestressed slab advantage, has excellent economy and applicability.

Claims (5)

1, a kind of large span prestressing without bondn cast-in-place hollow slab, surface layer reinforced mesh (4), bearing rod (5) and hollow section (6) constitute down by surface layer (2), upper layer reinforced mesh (3) under the concrete upper layer (1), it is characterized by prefabricated thin-wall hollow section (6) is fixed between upper layer reinforced mesh (3) and the following surface layer reinforced mesh (4) according to certain intervals, unbonded prestressing tendon (7) is prepared with curve form in the interval of hollow section (6), forms prestressing without bondn cast-in-place hollow plated construction.
2, prestressing without bondn cast-in-place hollow slab according to claim 1 is characterized in that thin-wall hollow pipe (6) material can be regenerated plastics pipe, thin wall cement pipe or paper core.
3, prestressing without bondn cast-in-place hollow slab according to claim 1 is characterized in that unbonded prestressing tendon (7) is the curve form layout.
4, prestressing without bondn cast-in-place hollow slab according to claim 1 is characterized in that unbonded prestressing tendon (7) material can be steel strand and adhesive-less prestress steel tow.
5, prestressing without bondn cast-in-place hollow slab according to claim 1 is characterized in that hollow section (6) fixedlys connected with template.
CN 00264800 2000-12-15 2000-12-15 Large span no-adhesive prestressed in-situ hollow slab CN2459379Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 00264800 CN2459379Y (en) 2000-12-15 2000-12-15 Large span no-adhesive prestressed in-situ hollow slab

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 00264800 CN2459379Y (en) 2000-12-15 2000-12-15 Large span no-adhesive prestressed in-situ hollow slab

Publications (1)

Publication Number Publication Date
CN2459379Y true CN2459379Y (en) 2001-11-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 00264800 CN2459379Y (en) 2000-12-15 2000-12-15 Large span no-adhesive prestressed in-situ hollow slab

Country Status (1)

Country Link
CN (1) CN2459379Y (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1304704C (en) * 2003-02-26 2007-03-14 邱则有 Cast-in-situ reinforced concrete storey top
CN100351474C (en) * 2005-11-24 2007-11-28 徐金声 Combined prestressing force concrete sandwich board and its construction method
CN100414051C (en) * 2003-02-26 2008-08-27 邱则有 Cast-in-situ reinforced concrete storey top
CN101059014B (en) * 2007-05-15 2010-05-19 广东省建筑设计研究院 Steel pipe hollow concrete building floor and construction method thereof
CN102071801A (en) * 2011-01-10 2011-05-25 中国建筑第四工程局有限公司 Positioning method and structure for hollow pipes in concrete hollow slab
CN102449248A (en) * 2009-05-15 2012-05-09 杜得胜 Steel reinforcement structure of bubbledeck slab elements and procedure of manufacturing bubbledeck slab elements
CN103410269B (en) * 2013-08-29 2016-02-10 陕西建工集团第六建筑工程有限公司 Prestressing without bondn cast-in-place reinforced concrete hollow slab constructing structure and construction method
CN110878609A (en) * 2019-12-03 2020-03-13 上海宝冶集团有限公司 Construction method of unbonded prestressed waffle slab

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1304704C (en) * 2003-02-26 2007-03-14 邱则有 Cast-in-situ reinforced concrete storey top
CN100414051C (en) * 2003-02-26 2008-08-27 邱则有 Cast-in-situ reinforced concrete storey top
CN100351474C (en) * 2005-11-24 2007-11-28 徐金声 Combined prestressing force concrete sandwich board and its construction method
CN101059014B (en) * 2007-05-15 2010-05-19 广东省建筑设计研究院 Steel pipe hollow concrete building floor and construction method thereof
CN102449248A (en) * 2009-05-15 2012-05-09 杜得胜 Steel reinforcement structure of bubbledeck slab elements and procedure of manufacturing bubbledeck slab elements
CN102449248B (en) * 2009-05-15 2014-01-01 杜得胜 Steel reinforcement structure of bubbledeck slab elements and procedure of manufacturing bubbledeck slab elements
CN102071801A (en) * 2011-01-10 2011-05-25 中国建筑第四工程局有限公司 Positioning method and structure for hollow pipes in concrete hollow slab
CN103410269B (en) * 2013-08-29 2016-02-10 陕西建工集团第六建筑工程有限公司 Prestressing without bondn cast-in-place reinforced concrete hollow slab constructing structure and construction method
CN110878609A (en) * 2019-12-03 2020-03-13 上海宝冶集团有限公司 Construction method of unbonded prestressed waffle slab

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CX01 Expiry of patent term

Expiration termination date: 20101215

Granted publication date: 20011114

C17 Cessation of patent right