CN110284674A - Reinforced concrete stairs embedded hole arrangement and the method for installing handrail and demolition blasting - Google Patents

Reinforced concrete stairs embedded hole arrangement and the method for installing handrail and demolition blasting Download PDF

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Publication number
CN110284674A
CN110284674A CN201910502813.3A CN201910502813A CN110284674A CN 110284674 A CN110284674 A CN 110284674A CN 201910502813 A CN201910502813 A CN 201910502813A CN 110284674 A CN110284674 A CN 110284674A
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CN
China
Prior art keywords
hole
reinforced concrete
bend pipe
concrete stairs
central axes
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Legal status (The legal status 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 status listed.)
Pending
Application number
CN201910502813.3A
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Chinese (zh)
Inventor
叶建军
陈飞
吴巍
尹仲
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Hubei University of Technology
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Hubei University of Technology
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Priority to CN201910502813.3A priority Critical patent/CN110284674A/en
Publication of CN110284674A publication Critical patent/CN110284674A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/18Balustrades; Handrails
    • E04F11/181Balustrades
    • E04F11/1812Details of anchoring to the wall or floor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42DBLASTING
    • F42D1/00Blasting methods or apparatus, e.g. loading or tamping
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42DBLASTING
    • F42D3/00Particular applications of blasting techniques
    • F42D3/02Particular applications of blasting techniques for demolition of tall structures, e.g. chimney stacks

Abstract

A kind of reinforced concrete stairs embedded hole arrangement and the method for installing handrail and demolition blasting, reinforced concrete stairs landing beam are embedded with bending two ends bend pipe, and side of marking time is embedded with through hole.Through hole is used as the installation of balustrade, increases use space of marking time while mitigating stair self weight, also acts as the lifting of precast stair, simplify installation procedure, accelerates erection schedule.Perforation long hole and bend pipe are used as the blasthole of demolition blasting in the future, avoid drilling bring noise dust pollution, and it is big to solve the problems, such as that reinforced concrete stairs removes hardly possible, risk.With significant economic benefit and social benefit.

Description

Reinforced concrete stairs embedded hole arrangement and installation handrail and demolition blasting Method
Technical field
The present invention relates to stair apparatus fields and blasting engineering field, and in particular to a kind of pre- using reinforced concrete stairs The arrangement of buried via hole and the method that handrail is installed using embedded hole, the invention further relates to utilize the embedded hole demolition blasting The method of stair.
Background technique
In engineering construction, stair mostly use the solid stair of cast-in-place monoblock type, and intensity is high, and structural stability is good, but are self-possessed Greatly, time-consuming for construction, and irregular because of worker's technical level, quality is often difficult to be protected, while also bringing to removing Very big puzzlement, forbidden in partial high-level building later using.Patent of invention CN108661255A discloses a kind of prefabricated Stair and its production method, middle part of marking time are provided with the loss of weight through-hole of perforation, and precast stair is to lift conveniently, two sides of marking time Often it is both provided with hole for hoist.Fixed in addition, balustrade passes through ironware or pedestal pre-buried in stair step mostly, construction compared with To be cumbersome, handrail is fixed on mark time on also affect the use space marked time.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of arrangement using reinforced concrete stairs embedded hole, And the method installed handrail using the embedded hole, and later period demolition blasting is carried out to stair using the embedded hole, that is, exist At the beginning of staircase design is built, just consider that dismountings is scrapped in the installation of balustrade and stair, to reduce construction and dismounting cost.
The object of the present invention is achieved like this: a kind of reinforced concrete stairs embedded hole arrangement, middle setting of marking time Several through holes, through hole are opened on side of marking time, the central axes of through hole to step surface, riser, cant beam bottom surface distance phase Deng;Or the distance of the central axes of through hole to cant beam bottom surface is shorter than the distance to step surface, riser;It is pre- along landing beam central axes The bend pipe of several bending two ends is buried, bend pipe both ends open is in the upper surface of landing, opening blocking.
The flat segments of bend pipe are parallel to landing beam central axes, according to landing beam arrangement of reinforcement in the downward 1-5cm in landing beam central axes Place's arrangement.
The diameter 40-60mm of the through hole.
The distance of the central axes of through hole to cant beam bottom surface is shorter than to step surface, the distance 1-3cm of riser.
Interval select and landing beam is non-conterminous mark time in 3-5 through hole as L shape elbow mounting hole, to arrange to help Hand, specifically includes the following steps:
1) L shape elbow is open from the through hole on the outside of stair step and is inserted into, adjustment L shape elbow elbow position makes outside its hole End opening is upward;
2) cement mortar is poured into hole, waits cement mortar hardening;
3) handrail, upright bar, cross bar are combined into prefabricated components, prefabricated components lower end is upright bar connector, makes upright bar connector It is directed at L shape elbow, L shape elbow is inserted into the hole of upright bar connector and fixes, and completes the installation of balustrade.
Using reinforced concrete stairs embedded hole to the method for stair demolition blasting, chooses bend pipe and L shape elbow is not installed Remaining through hole in 3-5 be used as blasthole, cut off L shape elbow, recycle balustrade, specifically includes the following steps:
1) blasthole surface mortar and plug, borehole cleaning are cut;
2) explosive is installed, when powder charge, water filling in bend pipe is worn a traction rope in bend pipe pipe, passed through in the bend pipe in landing beam Continuous pack or discontinuous pack are dragged in bend pipe by traction rope, block both ends open;When through hole powder charge, by continuous pack or In discontinuous pack push-in hole, blasthole is blocked, powder charge is completed;
3) blasting network, detonation are connected.
When continuous charging, it is inserted with detonator in pack, lead is inserted on detonator and leads to outside blasthole;When Discontinuous charge, Explosive section is bound using primacord interval.
The method tool of reinforced concrete stairs embedded hole arrangement provided by the invention and installation handrail and demolition blasting Have it is following the utility model has the advantages that
1) through hole, pre-buried bend pipe are reserved in reinforced concrete stairs, can be used as the blasthole of demolition blasting in the future, solve reinforcing bar Concrete staircase removes difficult problem, also can avoid drilling bring noise and dust pollution;
2) handrail is mounted on side of marking time, and except increase is marked time in addition to use space, can also improve stair safety to stair shaft effective protection Performance;
3) stair are embedded with through hole and bend pipe, mitigate the lifting for facilitating prefabricated components while stair self weight;
4) when handrail is removed, entire balustrade can be sawed-off from L shape elbow, is convenient for secondary use.
5) entire balustrade superstructure is prefabricated components, is suitble to industrialized production, and installation is simple, can shorten the construction period.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is handrail installation overall effect figure;
Fig. 2 is through hole arrangement schematic diagram;
Fig. 3 is stair side schematic view;
Fig. 4 is L shape bend pipe schematic diagram;
Fig. 5 is landing beam longitudinal section.
In figure: through hole 1, L shape bend pipe 2, cross bar 3, upright bar 4, handrail 5, landing 6, stringer 7, landing beam 8, it marks time 9, tyre tread 901, riser 902, upright bar connector 10, pre-buried bend pipe 11;B be through hole to tyre tread distance, a be to riser Distance, c are to 7 bottom surface distance of cant beam.
Specific embodiment
Embodiment 1:
Certain building storey is 5.4 meters high, and for staircase having a size of 3.6 meters × 6.6 meters, stair are assembled dogleg stair, and stair are helped Hand getting stainless steel metal handrail.It marks time 1.7 meters wide, 0.15 meter high, step surface is 0.3 meter wide, designs 12 step of step number.Landing beam is set For meter having a size of 3.6 meters × 0.3 meter × 0.6 meter, cant beam design size is 3.6 meters × 0.2 meter × 0.3 meter.Floor platform and rest Platform Designing size is 3.6 meters × 1.5 meters, and stair shaft is 0.2 meter wide.
The arrangement of stair embedded hole are as follows: when stair are prefabricated in the factory, mark time in pre-buried diameter 40mm pvc pipe conduct Through hole, the distance of through hole 1 central axes to step surface 901, riser 902 is 0.15 meter, the distance to cant beam bottom surface is 0.14 meter, be opened on mark time 9 side, as shown in Figure 2;Along the bend pipe of the bending two ends of the pre-buried diameter 40mm in landing beam central axes 11,11 flat segments of bend pipe are pre-buried to be parallel to central axes, is arranged at the downward 2cm in central axes, both ends open is in table on landing Face, opening are blocked with building gypsum.
Handrail is installed using above-mentioned embedded hole:
1) as shown in figure 4, L shape curved 2 is inserted into from the opening on the outside of stair step, adjustment elbow position opens its outer end of hole Mouth is upward;
2) cement mortar is poured into hole, waits cement mortar hardening;
3) handrail 5, upright bar 4, cross bar 3 are combined into prefabricated components and are transported to in-site installation, L shape elbow is directed at prefabricated components lower end Upright bar connector, be inserted into connector aperture in, connector by welding manner connection, the installation of balustrade is completed, such as Fig. 3 institute Show.
With embedded hole to reinforced concrete stairs demolition blasting: selecting the emulsion explosive cartridge of diameter 32mm, length 0.2 M, using Discontinuous charge structure, spacing 0.3m, the specific steps are as follows:
1) L shape elbow 2 is cut off, entire balustrade is resolved into multiple prefabricated components, is recycled;
2) pre-buried bend pipe 11 and the through hole 1 chosen are found as blasthole, is cut used when surface mortar and closure early period Building gypsum, with pressure fan borehole cleaning;3-5 for specifically choosing bend pipe 11 and not installing in the remaining through hole of L shape elbow 2 makees For blasthole;
3) powder stick is being bound with 0.3m spacing on primacord: when landing beam powder charge, is being filled the water in bend pipe, wears a traction rope in pipe, The explosive section bound is dragged in bend pipe by traction rope, blocks both ends open;When through hole powder charge, it will be bound with thin stick In good explosive push-in hole, blasthole is blocked, powder charge is completed;
4) blasting network, detonation are connected.
Embodiment 2:
Certain building storey is 5.4 meters high, and for staircase having a size of 3.3 meters × 5.7 meters, stair are integral cast-in-situ formula double race stair in parallel, building Ladder rail uses stainless steel metal handrail.It marks time 1.5 meters wide, 0.15 meter high, step surface is 0.3 meter wide, designs 9 step of step number.Platform Beam design size is 3.6 meters × 0.4 meter × 0.7 meter, and cant beam design size is 2.7 meters × 0.2 meter × 0.3 meter.Floor platform and Half space design size is 3.6 meters × 1.5 meters, and stair shaft is 0.3 meter wide.
The arrangement of stair embedded hole are as follows: when stair are prefabricated in the factory, mark time in pre-buried diameter 50mmPVC pipe as passing through Through-hole, the distance of through hole 1 central axes to step surface 901, riser 902 is 0.15 meter, the distance to cant beam bottom surface is 0.15 Rice, be opened on mark time 9 side, as shown in Figure 2;Along the bend pipe 11 of the bending two ends of the pre-buried diameter 50mm in landing beam central axes, 11 flat segments of bend pipe are pre-buried to be parallel to central axes, is arranged at the downward 3cm in central axes, both ends open in landing upper surface, Opening is blocked with building gypsum.
Handrail is installed using above-mentioned embedded hole:
1) as shown in figure 4, L shape curved 2 is inserted into from the opening on the outside of stair step, adjustment elbow position opens its outer end of hole Mouth is upward;
2) cement mortar is poured into hole, waits cement mortar hardening;
3) handrail 5, upright bar 4, cross bar 3 are combined into prefabricated components and are transported to in-site installation, L shape elbow is directed at prefabricated components lower end Upright bar connector, be inserted into connector aperture in, connector by welding manner connection, the installation of balustrade is completed, such as Fig. 3 institute Show.
With embedded hole to reinforced concrete stairs demolition blasting: selecting the emulsion explosive cartridge of diameter 25mm, length 0.2 M, using continuous charging structure, spacing 0.3m, the specific steps are as follows:
1) L shape elbow 2 is cut off, entire balustrade is resolved into multiple prefabricated components, is recycled;
2) pre-buried bend pipe 11 and the through hole 1 chosen are found as blasthole, is cut used when surface mortar and closure early period Building gypsum, with pressure fan borehole cleaning;3-5 for specifically choosing bend pipe 11 and not installing in the remaining through hole of L shape elbow 2 makees For blasthole;
3) powder stick is being bound with 0.3m spacing on primacord: when landing beam powder charge, is being filled the water in bend pipe, wears a traction rope in pipe, The explosive section bound is dragged in bend pipe by traction rope, blocks both ends open;When through hole powder charge, it will be bound with thin stick In good explosive push-in hole, blasthole is blocked, powder charge is completed;
4) blasting network, detonation are connected.

Claims (7)

1. a kind of reinforced concrete stairs embedded hole arrangement, it is characterised in that: (9) middle several through holes (1) of setting of marking time, Through hole (1) is opened on side of marking time, the central axes to step surface (901), riser (902), cant beam (7) bottom surface of through hole (1) Be equidistant;Or the distance of the central axes of through hole (1) to cant beam (7) bottom surface is shorter than to step surface (901), riser (902) distance;Along the bend pipe (11) of the pre-buried several bending two ends in landing beam (8) central axes, bend pipe (11) both ends open is in building The upper surface of terraced platform (6), opening blocking.
2. reinforced concrete stairs embedded hole arrangement according to claim 1, it is characterised in that: bend pipe (11) is put down Straight section is parallel to landing beam (8) central axes, is arranged at the downward 1-5cm in landing beam central axes according to landing beam arrangement of reinforcement.
3. reinforced concrete stairs embedded hole arrangement according to claim 1, it is characterised in that: the through hole (1) diameter 40-60mm.
4. reinforced concrete stairs embedded hole arrangement according to claim 1, it is characterised in that: through hole (1) The distance of central axes to cant beam (7) bottom surface is shorter than to step surface (901), the distance 1-3cm of riser (902).
5. utilizing the method for reinforced concrete stairs embedded hole installation handrail described in claim 1, it is characterised in that: interval choosing Select with landing beam (8) are non-conterminous mark time in 3-5 through hole (1) be used as L shape elbow (2) mounting hole, to arrange handrail, specifically The following steps are included:
1) L shape elbow (2) is open from the through hole (1) on the outside of stair step (9) and is inserted into, adjust L shape elbow (2) elbow Position keeps its outer end of hole opening up;
2) cement mortar is poured into hole, waits cement mortar hardening;
3) handrail (5), upright bar (4), cross bar (3) being combined into prefabricated components, prefabricated components lower end is upright bar connector (10), Upright bar connector (10) are made to be directed at L shape elbow (2), L shape elbow (2) is inserted into the hole of upright bar connector (10) and fixed, completion The installation of balustrade.
6. special using any reinforced concrete stairs embedded hole of claim 1-4 to the method for stair demolition blasting Sign is: choosing bend pipe (11) and does not install 3-5 in the remaining through hole of L shape elbow (2) as blasthole, it is curved to cut off L shape Head (2) recycles balustrade, specifically includes the following steps:
1) blasthole surface mortar and plug, borehole cleaning are cut;
2) explosive is installed, when powder charge, water filling in bend pipe (11) is worn in bend pipe (11) pipe in the bend pipe (11) in landing beam (8) Continuous pack or discontinuous pack are dragged in bend pipe (11) by traction rope, block both ends open by a piece traction rope;Through hole (1) when powder charge, by continuous pack or discontinuous pack push-in hole, blasthole is blocked, powder charge is completed;
3) blasting network, detonation are connected.
7. a kind of method using reinforced concrete stairs embedded hole demolition blasting according to claim 6, feature exist In: when continuous charging, it is inserted with detonator in pack, lead is inserted on detonator and is led to outside blasthole;When Discontinuous charge, explosive section It is bound using primacord interval.
CN201910502813.3A 2019-06-11 2019-06-11 Reinforced concrete stairs embedded hole arrangement and the method for installing handrail and demolition blasting Pending CN110284674A (en)

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CN201910502813.3A CN110284674A (en) 2019-06-11 2019-06-11 Reinforced concrete stairs embedded hole arrangement and the method for installing handrail and demolition blasting

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113654423A (en) * 2021-08-31 2021-11-16 湖北工业大学 Green demolition method for mechanical cutting and remote blasting of pre-buried hole of reinforced concrete beam column
GB2595356A (en) * 2020-05-22 2021-11-24 Delta Uk Holdings Ltd Baluster arrangement

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2619996Y (en) * 2003-05-31 2004-06-09 蔺文忠 Suspended stair handrail
US8056885B2 (en) * 2006-11-13 2011-11-15 Sandor Sr Frederick J Stair, ramp, or balcony railing system
CN204152113U (en) * 2014-08-28 2015-02-11 中国建筑第八工程局有限公司 Masonry panel balustrade pre-buried structure
CN104947868A (en) * 2015-05-28 2015-09-30 苏州金螳螂建筑装饰股份有限公司 Base of cantilever sheet type rail post and installation method of base
CN104964624A (en) * 2015-07-01 2015-10-07 武汉宏伟交通爆破工程有限公司 Axial embedded blast hole of reinforced concrete beam and blasting demolition method
CN105091682A (en) * 2015-07-01 2015-11-25 叶建军 Axial pre-casting blast hole of reinforced concrete column and demolition blasting method
CN105571418A (en) * 2016-02-23 2016-05-11 程大春 Water-coupled charging blasting demolition method for reinforced concrete beam or column
US20160333594A1 (en) * 2012-03-19 2016-11-17 Collins Limited, Llc Adjustable railing
CN108661255A (en) * 2018-04-24 2018-10-16 怀化市港翔管桩有限公司 A kind of assembling-type precast stair and its production method
CN208329421U (en) * 2018-06-15 2019-01-04 深圳新艺华建筑装饰工程有限公司 A kind of architectural decoration protective fence

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2619996Y (en) * 2003-05-31 2004-06-09 蔺文忠 Suspended stair handrail
US8056885B2 (en) * 2006-11-13 2011-11-15 Sandor Sr Frederick J Stair, ramp, or balcony railing system
US20160333594A1 (en) * 2012-03-19 2016-11-17 Collins Limited, Llc Adjustable railing
CN204152113U (en) * 2014-08-28 2015-02-11 中国建筑第八工程局有限公司 Masonry panel balustrade pre-buried structure
CN104947868A (en) * 2015-05-28 2015-09-30 苏州金螳螂建筑装饰股份有限公司 Base of cantilever sheet type rail post and installation method of base
CN104964624A (en) * 2015-07-01 2015-10-07 武汉宏伟交通爆破工程有限公司 Axial embedded blast hole of reinforced concrete beam and blasting demolition method
CN105091682A (en) * 2015-07-01 2015-11-25 叶建军 Axial pre-casting blast hole of reinforced concrete column and demolition blasting method
CN105571418A (en) * 2016-02-23 2016-05-11 程大春 Water-coupled charging blasting demolition method for reinforced concrete beam or column
CN108661255A (en) * 2018-04-24 2018-10-16 怀化市港翔管桩有限公司 A kind of assembling-type precast stair and its production method
CN208329421U (en) * 2018-06-15 2019-01-04 深圳新艺华建筑装饰工程有限公司 A kind of architectural decoration protective fence

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2595356A (en) * 2020-05-22 2021-11-24 Delta Uk Holdings Ltd Baluster arrangement
CN113654423A (en) * 2021-08-31 2021-11-16 湖北工业大学 Green demolition method for mechanical cutting and remote blasting of pre-buried hole of reinforced concrete beam column

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