CN104964624B - Reinforced beam axially pre-buried blasthole and demolition blasting method - Google Patents

Reinforced beam axially pre-buried blasthole and demolition blasting method Download PDF

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Publication number
CN104964624B
CN104964624B CN201510376852.5A CN201510376852A CN104964624B CN 104964624 B CN104964624 B CN 104964624B CN 201510376852 A CN201510376852 A CN 201510376852A CN 104964624 B CN104964624 B CN 104964624B
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blasthole
buried
reinforced
pack
buried blasthole
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CN104964624A (en
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程大春
叶建军
明军
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WUHAN HONGWEI TRAFFIC BLASTING ENGINEERING CO., LTD.
Hubei University of Technology
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WUHAN HONGWEI TRAFFIC BLASTING ENGINEERING Co Ltd
Hubei University of Technology
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Abstract

A kind of reinforced beam axially pre-buried blasthole and demolition blasting method, it takes forms blasthole in beam axial direction built-in pipe, and using continuously or discontinuously powder charge, in the technological means such as the overall length arrangement primacord of blasthole and cut-out stirrup in blasthole, it avoids bore operation, reduce blasthole and detonator quantity, reduce the consumption of explosive and detonator, the crushing effect of armored concrete is improved, alleviates destruction of the explosion to environment.The present invention can bring significant economic and social benefit.

Description

Reinforced beam axially pre-buried blasthole and demolition blasting method
Technical field
The present invention relates to blasting engineering field, a kind of knot of the axial pre-buried blasthole of reinforced beam is in particular related to Structure and the BLASTING TECHNOLOGY FOR DEMOLITION using this pre-buried blasthole.
Background technology
In engineering construction, many reinforced beams need to remove.Blasting technique is the efficient of reinforced beam dismounting Means.For the demolition blasting of reinforced beam, in engineering common practice be when wanting building demolition just construct borehole and Bursting work is carried out, and the blasthole arranged is perpendicular to beam axis.This way has many drawbacks:1st, due to reinforcing bar in beams of concrete (Particularly densely covered stirrup)Presence, drilling it is difficult, drilling often cost it is very high.2nd, perpendicular to the big gun of beam axis arrangement Hole utilization rate in explosion is low(Particularly when the cross sectional dimensions of beam is little), big cut will be used to block, for powder charge Effective length is small;And due to more than blasthole, it is necessary to more detonator and plugging material.3rd, since blasthole is more, detonator is more, explosion blocks It is very big with blasting network attended operation workload, it is susceptible to maloperation and the error of such as miso-fire etc.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of demolition blasting of the axial pre-buried blasthole of reinforced beam Technology, beams of concrete design at the beginning of in advance consider demolition blasting the problem of, be specifically beams of concrete construction when it is axially pre-buried Pipeline forms the blasthole for being used for demolition blasting in the future, to achieve the purpose that efficient, inexpensive demolition blasting beams of concrete.
The object of the present invention is achieved like this:A kind of axial pre-buried blasthole of reinforced beam, pre-buried blasthole is along steel Concrete Beam Reinforced is axially pre-buried, and one or both ends are opened on the end cross section of reinforced beam or armored concrete beam-ends On side near head;There is continuously or discontinuously pack during explosion in blasthole.
The pre-buried blasthole uses PVC plastic pipe.
The pack can be replaced with powder stick or powder charge pipe.
The overall length of pre-buried blasthole has primacord.
Detonator is inserted in a pack in continuous pack in pre-buried blasthole, the lead of detonator is led to outside pre-buried blasthole Face.
Pre-buried blasthole end not powder charge, and blocked using stemming or old newsprint.
It is a kind of using the reinforced beam method that axially pre-buried blasthole carries out reinforced beam demolition blasting, including with Lower step:
1)Concrete cover is destroyed, the pre-buried blasthole of pipe is found, and blasthole is cleared up with high-pressure blast;
2)Primacord is inserted into built-in pipe, and primacord both ends are fixed on outside pre-buried blasthole, then using continuous dress Medicine structure is packed into pack in pre-buried blasthole;Or it after primacord is used to bind discontinuous pack, is put into pre-buried blasthole;
3)Ignite primacord.
It is a kind of to utilize the reinforced beam method that axially pre-buried blasthole carries out reinforced beam demolition blasting, feature It is:
1)Concrete cover is destroyed, the pre-buried blasthole of pvc pipe is found, and blasthole is cleared up with pressure wind;
2)The powder charge by the way of continuous charging in pre-buried blasthole is inserted into detonator in a wherein pack, and will be drawn Line is led to outside hole;Then blasthole is blocked with stemming or old newsprint;
3)Detonating primer.
In above two method, in step 1)With step 2)Between there are one step:Using cutting pliers, oxygen welding or cutting Machine cuts off stirrup in the centre position of a side of reinforced beam or more than one side.
The invention has the advantages that:
Full-time design theory is introduced into the projects of reinforced beam by the present invention, fundamentally changes building Design, construction and the dismounting of component and material reuse are the revolutionary progress in this field.
BLASTING TECHNOLOGY FOR DEMOLITION scheme provided by the invention, the pre-buried PVC pipeline when reinforced beam is constructed(PVC pipeline Wiring architecture and communication line passage can be also served as).Pvc pipe need to be only found during Demolition Construction, it is possible to carry out bursting work, keep away Exempt to drill in armored concrete, saved a large amount of manpower and materials, also avoided drilling construction noise pollution.
BLASTING TECHNOLOGY FOR DEMOLITION scheme provided by the invention, a beam only need one or several blastholes, only need one or a few Primacord;Or one piece or several pieces of detonators.The consumption of explosive is greatly reduced, can greatly improve explosion peace in many occasions Quan Xing.Also greatly reduce explosion plug-hole and connect the workload of blasting network, reduce the fault rate of blast operations.
The present invention provides axial pre-buried blasthole scheme, can be reduced fully by blasting energy for the broken of armored concrete Noise of blasting and slungshot, are conducive to shotfiring safety.
BLASTING TECHNOLOGY FOR DEMOLITION scheme provided by the invention, by the stirrup for cuing off beam sides, it is possible to reduce stirrup bonds Power improves the quick-fried broken effect of explosion, reduces second-time breakage;It is also beneficial to the circulating and recovering of stirrup and concrete.
The invention avoids bore operation, reduce blasthole and detonator quantity, reduce the consumption of explosive and detonator, improve The crushing effect of armored concrete alleviates destruction of the explosion to environment;Significant economic and social benefit can be brought.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is one embodiment cross-sectional view of the axial pre-buried blasthole of reinforced beam(The A-A positions of sectional view 2 It puts).
Fig. 2 is one embodiment Longitudinal cross section schematic of the axial pre-buried blasthole of reinforced beam(Section is in the B-B of Fig. 1 Position.
Fig. 3 is the Longitudinal cross section schematic of axial another embodiment of pre-buried blasthole of reinforced beam.
Specific embodiment
As shown in Figure 1 and Figure 2, the axial pre-buried blasthole of a kind of reinforced beam, an implementation including blast hole loading structure The cross section of example and Longitudinal cross section schematic, including the pack 2 in longitudinal reinforcement 4, stirrup 5, the pre-buried blasthole 1 in longitudinal direction, pre-buried blasthole 1 With primacord 3, pre-buried blasthole 1 is opened on the end cross section of beam.
Two side interpositions of reinforced beam are equipped with notch 6, and stirrup is cut off at notch 6;Steel wire can be used Pincers, oxygen welding or cutting machine cutting stirrup.
As shown in Figure 1, Figure 3, the axial pre-buried blasthole of a kind of reinforced beam, an implementation including blast hole loading structure The cross section of example and Longitudinal cross section schematic, including the pack 2 in longitudinal reinforcement 4, stirrup 5, the pre-buried blasthole 1 in longitudinal direction, pre-buried blasthole 1 With primacord 3, parallel to beam axis, end is bent up for pre-buried 1 center section of blasthole, is opened on the side near beam both ends(I.e. The upper surface of beam).
Above-mentioned pre-buried blasthole 1 uses PVC plastic pipe.
Above-mentioned pack 2 can also be replaced in actual use with powder stick or powder charge pipe.
In above-mentioned two scheme, when beam length is less than or equal to 6m, the desirable primacord 3 that disappears is used instead and detonator is inserted in pack Detonation mode.
In said program, pre-buried blasthole can be with end not powder charge, and is blocked using stemming or old and useless newspaper.
Embodiment 1
Width × height of reinforced beam × long size is 0.4m × 0.6 m × 4m, and the pvc pipe of pre-buried 30 mm of diameter is made It for pre-buried blasthole, is arranged in beam longitudinal central axis line, 4 m of length, both ends open is on beam-ends cross section.Emulsion explosive cartridge Diameter 25mm, 0.2 m of length, using Discontinuous charge structure, spacing 0.2m.
According to the pre-buried blasthole of above-mentioned axial direction and blast hole loading structure, working procedure of the invention is:
1)Concrete cover is destroyed, PVC built-in pipes is found, and pipeline is cleared up with pressure wind;
2)Pack is discontinuously bound with 0.2m spacing on primacord, is subsequently sent in built-in pipe;
3)Ignite primacord.
Embodiment 2
Width × height of reinforced beam × long size is 0.6 m × 0.9 m × 6.5m, and beam both ends are invisible.Two straight Footpath, which is that the pvc pipe of 30mm is pre-buried, to be arranged on beam longitudinal direction as pre-buried blasthole, and interlude is parallel with beam longitudinal axis, on end It is curved, it is opened on the upper surface near the end of beam.Two blasthole spacing 0.3m, the left and right sides 0.3m apart from beam;Big gun above Pitch-row from beam upper surface 0.3m, below blasthole apart from beam lower surface 0.3m.Using Discontinuous charge, emulsifying medicine coil diameter 25mm, Powder stick length 0.2m, spacing 0.2m.
According to the pre-buried blasthole of above-mentioned axial direction and blast hole loading structure, working procedure of the invention is:
1)Concrete cover is destroyed, the pre-buried blastholes of PVC is found, and pipeline is cleared up with pressure wind;
2)Pack is discontinuously bound with 0.2m spacing on primacord, is subsequently sent in pre-buried blasthole;
3)Ignite primacord.
Embodiment 3
Width × height of reinforced beam × long size is 1.4m × 2.1 m × 6m.The pvc pipe of two a diameter of 32mm is pre- It buries to be arranged on beam longitudinal direction and is used as pre-buried blasthole, it is parallel with beam axis, it is opened on the end cross section of beam, two blasthole spacing 0.7m, the left and right sides 0.7m apart from beam;Blasthole is apart from beam upper surface 0.7m above, below blasthole apart from beam lower surface 0.7m.Using continuous charging structure, and use stemming plug-hole.Using the aqueous gels powder charge pipe of a diameter of 28mm, length 0.2m.
According to the pre-buried blasthole of above-mentioned axial direction and blast hole loading structure, working procedure of the invention is:
1)Concrete cover is destroyed, PVC built-in pipes is found, and pipeline is cleared up with pressure wind;
2)The form of construction work cut using cutting pliers, oxygen welding or cutting machine, among two sides of reinforced beam Position cuts off stirrup;
3)Using continuous charging structure, powder charge pipe is packed into built-in pipe;And detonator is inserted into a wherein powder charge pipe, Lead(Fuse cord)It leads to outside hole;Blasthole opening is blocked using stemming;
4)Detonating primer.

Claims (7)

1. a kind of axial pre-buried blasthole of reinforced beam, it is characterised in that:Pre-buried blasthole(1)It is axial along reinforced beam It is pre-buried, pre-buried blasthole(1)Both ends open, its one end or both ends open are on the side near the reinforced beam end;Explosion When blasthole(1)In have continuous pack(2)Or discontinuous pack;
When using continuous pack, pre-buried blasthole(1)In continuous pack(2)In a pack in be inserted with detonator, detonator Lead leads to pre-buried blasthole(1)Outside;
The pre-buried blasthole(1)One or both ends are bent.
2. a kind of axial pre-buried blasthole of reinforced beam according to claim 1, it is characterised in that:The pre-buried big gun Hole(1)Using PVC plastic pipe.
3. a kind of axial pre-buried blasthole of reinforced beam according to claim 1, it is characterised in that:The pack (2)It can be replaced with powder stick or powder charge pipe.
4. a kind of axial pre-buried blasthole of reinforced beam according to claim 1, it is characterised in that:Pre-buried blasthole(1) End not powder charge, and blocked using stemming or old newsprint.
5. using reinforced beam described in claim 1, axially pre-buried blasthole carries out the side of reinforced beam demolition blasting Method, it is characterised in that:Comprise the following steps:
1)Concrete cover is destroyed, finds pre-buried blasthole(1), and clear up blasthole with high-pressure blast;
2)Primacord is inserted into pre-buried blasthole(3), and by primacord(3)Both ends are fixed on pre-buried blasthole(1)Outside, then adopt With continuous charging structure, in pre-buried blasthole(1)Middle loading pack(2);Or using primacord(3)After binding discontinuous pack, put Enter pre-buried blasthole(1)In;
3)Ignite primacord(3).
6. using reinforced beam described in claim 1, axially pre-buried blasthole carries out the side of reinforced beam demolition blasting Method, it is characterised in that:Comprise the following steps:
1)Concrete cover is destroyed, finds the pre-buried blasthole of pvc pipe(1), and clear up blasthole with high-pressure blast;
2)In pre-buried blasthole(1)The middle powder charge by the way of continuous charging, is inserted into detonator in a wherein pack, and by lead It leads to outside hole;Then blasthole is blocked with stemming or old newsprint;
3)Detonating primer.
7. the method for reinforced beam demolition blasting according to claim 5 or 6, it is characterised in that:In step 1)With Step 2)Between there are one step:Using cutting pliers, oxygen welding or cutting machine, in a side of reinforced beam or one The centre position cut-out stirrup of above side.
CN201510376852.5A 2015-07-01 2015-07-01 Reinforced beam axially pre-buried blasthole and demolition blasting method Active CN104964624B (en)

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105587119A (en) * 2016-01-29 2016-05-18 武汉爆破有限公司 Cast-in-place concrete pre-buried hole forming device and cast-in-place concrete pre-buried shot hole forming method thereof
CN105627845B (en) * 2016-02-22 2018-08-24 叶建军 The long bag of powder charge and using the long bag of powder charge to the method for blast hole projectile filling
CN105823386B (en) * 2016-06-03 2017-06-09 武汉科技大学 The blasting demolishing method of reinforced concrete brace in a kind of foundation ditch
CN106049503B (en) * 2016-06-06 2017-11-10 武汉科技大学 The preprocess method of reinforced concrete brace demolition blasting in a kind of foundation ditch
CN106437197A (en) * 2016-07-29 2017-02-22 上海建工四建集团有限公司 Static crushing structure for removing concrete and construction method thereof
CN108871126B (en) * 2018-07-04 2020-03-10 中国人民解放军陆军工程大学 Device for blasting power transmission tower by using prefabricated granular medium
CN108871127B (en) * 2018-07-04 2020-03-10 中国人民解放军陆军工程大学 Blasting device and blasting method for angle steel structure power transmission tower
CN108827094B (en) * 2018-07-04 2021-02-09 中国人民解放军陆军工程大学 Blasting demolition device and blasting method for H-shaped steel plant
CN108871128B (en) * 2018-07-04 2020-03-10 中国人民解放军陆军工程大学 Method for blasting power transmission tower by using prefabricated granular medium
CN109680986B (en) * 2019-01-10 2019-09-10 哈尔滨理工大学 Reinforced concrete structure static state noiseless method for dismounting
CN109707118B (en) * 2019-01-18 2021-01-05 湖北工业大学 Pre-buried arrangement mode and method for downpipe used as demolition blast hole in building periphery column
CN110284674A (en) * 2019-06-11 2019-09-27 湖北工业大学 Reinforced concrete stairs embedded hole arrangement and the method for installing handrail and demolition blasting

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