CN103184739A - Demolition blasting method for reinforced concrete bracing - Google Patents
Demolition blasting method for reinforced concrete bracing Download PDFInfo
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- CN103184739A CN103184739A CN2011104490985A CN201110449098A CN103184739A CN 103184739 A CN103184739 A CN 103184739A CN 2011104490985 A CN2011104490985 A CN 2011104490985A CN 201110449098 A CN201110449098 A CN 201110449098A CN 103184739 A CN103184739 A CN 103184739A
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Abstract
The invention discloses a demolition blasting method for a reinforced concrete bracing. The demolition blasting method is used for demolition of a large-sized deep foundation pit bracing, and is characterized by comprising the following steps of: a, embedding blast holes in the top of a cast-in-situ concrete beam to be demolished; b, arranging one priming cartridge in each blast hole, placing a weighed single-hole explosive load in a water-proof plastic bag, inserting a detonator in the water-proof plastic bag, and fixing the detonator by using a fine wire; c, adopting a non-electric initiation network, arranging one non-electric HS-7 detonator in each blast hole, clustering detonating tubes led out of a plurality of adjacent blast holes into a cluster handle according to designed single-section maximum charge quantity, and utilizing an electric detonator as a firing point; d, erecting a protective frame on the side face and the top of the demolition bracing by using steel tubes and buckles; and e, performing direct initiation to demolish the bracing by firing the electric detonator with a capacitive blaster as a blasting power source. The demolition blasting method for the reinforced concrete bracing has the advantages of safety, high efficiency, low pollution, convenience in reinforcing steel bar recovery and resource saving.
Description
Technical field
The present invention relates to a kind of blasting demolishing method, specifically, is a kind of steel concrete support blasting demolishing method of removing that supports for large-scale deep foundation ditch.
Background technology
Along with the development of building construction technology, various large-scale deep foundation ditchs increase thereupon, and foundation ditch supporting removal amount also constantly increases.Steel concrete supporting removal method commonly used at present has: (1) hydraulic hammer (pneumatic pick is abolished) method for dismounting is long in time limit, and noise pollution is big; (2) the expansion agent method for dismounting duration longer, slag tap and to reclaim waste and old reinforcing bar slow; (3) the Buddha's warrior attendant chain cutting method duration shorter, but can't reclaim waste and old reinforcing bar, wasted a large amount of available resources.
Therefore known steel concrete supporting removal method exists above-mentioned all inconvenience and problem.
Summary of the invention
Purpose of the present invention is to propose a kind of efficient quick and removes, reclaims the steel concrete support blasting demolishing method that reinforcing bar is convenient and the noise pollution duration is extremely short.
For achieving the above object, technical solution of the present invention is:
A kind of steel concrete supports blasting demolishing method, is used for large-scale deep foundation ditch and supports dismounting, it is characterized in that may further comprise the steps:
A, before waiting to remove the cast-in-situ concrete of back portion pre-buried big gun hole;
B, each big gun hole arrange 1 igniting primer, and load weighted single hole explosive payload is put into the waterproof plastic bag, and 1 piece of detonator of interpolation uses thin wire that it is fixed;
C, employing non-electric initiation networking, each big gun hole arranges 1 piece of non-electric HS-7 detonator, and according to the single hop battering charge of design, the detonator bunch connection that several adjacent big gun holes are drawn is a boundling handle, and the percussion point uses an electric cap;
D, use steel pipe and fastener to set up protective frame removing side and the top supported, and use bamboo basketry and color cloth to cover and fix, form totally enclosed protection canopy;
E, with the capacitive blaster power supply electrical turning detonator of doing to detonate, carry out direct initiation and remove and support.
Steel concrete of the present invention supports blasting demolishing method and can also be further achieved by the following technical measures.
Aforesaid method, among the wherein said step a, the big gun hole is that the vertical paper tube of diameter 40～50mm is done the big gun hole, borehole spacing 0.5～0.7m, big gun hole array pitch 0.3～0.5m, minimum burden are 0.3m.
Aforesaid method, among the wherein said step b, detonator is half second time-delay Nonel detonator.
Aforesaid method, among the wherein said step b, the big gun hole is the surplus bore portion of powder charge not, uses clay stemming to clog, until filling and leading up gun muzzle.
Aforesaid method, among the wherein said step c, each boundling handle connects 2 pieces of non-electric MS-3 detonators, and each boundling handle is connected, and forms some and the annular branch road of connecting; Use non-electric MS-5 detonator to connect between each annular branch road, thereby form the circular symmetric blasting circuit of multiple branch circuit.
After adopting technique scheme, steel concrete of the present invention supports blasting demolishing method and has the following advantages:
1, safely, efficiently, pollution is little;
2, reinforcing bar reclaims conveniently;
3, economize on resources.
Description of drawings
Fig. 1 is the initiation net schematic diagram of the embodiment of the invention.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing thereof the present invention is illustrated further.
A kind of steel concrete of the present invention supports blasting demolishing method, it is characterized in that may further comprise the steps:
A, waiting to remove pre-buried big gun hole, cast-in-situ concrete beam top, the vertical paper tube of diameter 40mm is done the big gun hole, borehole spacing 0.5m, big gun hole array pitch 0.3m, minimum burden 0.3m.
B, each big gun hole arrange 1 igniting primer, and load weighted single hole explosive payload is put into the waterproof plastic bag, and 1 piece of detonator of interpolation, described detonator are half second time-delay Nonel detonator, use thin wire that it is fixed; The big gun hole is the surplus bore portion of powder charge not, uses clay stemming to clog, until filling and leading up gun muzzle.
C, employing non-electric initiation networking, each big gun hole arranges 1 piece of non-electric HS-7 detonator, single hop battering charge according to design, the detonator bunch connection that several adjacent big gun holes are drawn is a boundling handle, each boundling is connecting 2 pieces of non-electric MS-3 detonators, and with each boundling connecting, form some and the annular branch road of connecting; Use non-electric MS-5 detonator to connect between each annular branch road, thereby form the circular symmetric blasting circuit of multiple branch circuit, the percussion point uses electric cap; Fig. 1 is the initiation net schematic diagram of the embodiment of the invention.
D, the steel pipe that uses diameter 48mm before detonating and fastener are set up protective frame removing side and the top supported, and use 1 layer of bamboo basketry and 2 layers of color cloth to cover and fix, and form totally enclosed protection canopy, prevent that slungshot from hurting sb.'s feelings.
E, with the capacitive blaster power supply electrical turning detonator of doing to detonate, carry out direct initiation and remove and support.
Steel concrete of the present invention supports blasting demolishing method and uses in the JinRong Building deep foundation pit reinforced concrete supporting removal project engineering of Zhenjiang, and effect is remarkable, has obtained exploiting entity, supervisor and owner's abundant affirmation.
Above embodiment is only for the usefulness that the present invention is described, but not limitation of the present invention, person skilled in the relevant technique under the situation that does not break away from the spirit and scope of the present invention, can also be made various conversion or variation.Therefore, all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (5)
1. a steel concrete supports blasting demolishing method, is used for large-scale deep foundation ditch and supports dismounting, it is characterized in that may further comprise the steps:
A, waiting to remove pre-buried big gun hole, cast-in-situ concrete beam top;
B, each big gun hole arrange 1 igniting primer, and load weighted single hole explosive payload is put into the waterproof plastic bag, and 1 piece of detonator of interpolation uses thin wire that it is fixed;
C, employing non-electric initiation networking, each big gun hole arranges 1 piece of non-electric HS-7 detonator, and according to the single hop battering charge of design, the detonator bunch connection that several adjacent big gun holes are drawn is a boundling handle, and the percussion point uses an electric cap;
D, use steel pipe and fastener to set up protective frame removing side and the top supported, and use bamboo basketry and color cloth to cover and fix, form totally enclosed protection canopy;
E, with the capacitive blaster power supply electrical turning detonator of doing to detonate, carry out direct initiation and remove and support.
2. steel concrete as claimed in claim 1 supports blasting demolishing method, it is characterized in that among the described step a, the big gun hole is that the vertical paper tube of diameter 40～50mm is done the big gun hole, borehole spacing 0.5～0.7m, and big gun hole array pitch 0.3～0.5m, minimum burden are 0.3m.
3. steel concrete as claimed in claim 1 supports blasting demolishing method, it is characterized in that, among the described step b, detonator is half second time-delay Nonel detonator.
4. steel concrete as claimed in claim 1 supports blasting demolishing method, it is characterized in that among the described step b, the big gun hole is the surplus bore portion of powder charge not, uses clay stemming to clog, until filling and leading up gun muzzle.
5. steel concrete as claimed in claim 1 supports blasting demolishing method, it is characterized in that, among the described step c, each boundling handle connects 2 pieces of non-electric MS-3 detonators, and each boundling handle is connected, and forms some and the annular branch road of connecting; Use non-electric MS-5 detonator to connect between each annular branch road, thereby form the circular symmetric blasting circuit of multiple branch circuit.
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| CN2011104490985A CN103184739A (en) | 2011-12-29 | 2011-12-29 | Demolition blasting method for reinforced concrete bracing |
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| CN2011104490985A CN103184739A (en) | 2011-12-29 | 2011-12-29 | Demolition blasting method for reinforced concrete bracing |
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| CN103184739A true CN103184739A (en) | 2013-07-03 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851967A (en) * | 2014-03-19 | 2014-06-11 | 中国人民解放军总参谋部工程兵科研三所 | Multipoint type non-electric initiation system for large-size explosive wave simulation device |
| CN104215136A (en) * | 2014-09-01 | 2014-12-17 | 武汉宏伟交通爆破工程有限公司 | Charging, blocking and slag pressing structure of demolition blasting blast-holes of reinforced concrete beam and demolition blasting method |
| CN104964623A (en) * | 2015-07-01 | 2015-10-07 | 叶建军 | Large-area or large-volume concrete pre-buried blast hole arrangement method and blasting demolition method |
| CN105507611A (en) * | 2015-12-18 | 2016-04-20 | 上海建工七建集团有限公司 | Method for dismantling bottom boards in existing deep foundation pit |
| 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 |
| CN105973085A (en) * | 2016-04-20 | 2016-09-28 | 安徽恒源煤电股份有限公司 | Explosion method capable of preventing misfire while driving in coal mine tunnel |
| CN106088098A (en) * | 2016-06-15 | 2016-11-09 | 龙元建设集团股份有限公司 | Supporting removal construction method |
| CN107560509A (en) * | 2017-09-27 | 2018-01-09 | 贵州安凯达实业股份有限公司 | A kind of explosion attachment structure for photoface exploision |
| CN107843160A (en) * | 2017-12-01 | 2018-03-27 | 武汉科技大学 | A kind of initiation net of deep foundation pit reinforced concrete support beam demolition blasting |
| CN107843158A (en) * | 2017-11-03 | 2018-03-27 | 北京科技大学 | The construction method of the low vibration velocity exact requirements of Tunnel Blasting is realized with common on-electric detonator |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851967A (en) * | 2014-03-19 | 2014-06-11 | 中国人民解放军总参谋部工程兵科研三所 | Multipoint type non-electric initiation system for large-size explosive wave simulation device |
| CN104215136A (en) * | 2014-09-01 | 2014-12-17 | 武汉宏伟交通爆破工程有限公司 | Charging, blocking and slag pressing structure of demolition blasting blast-holes of reinforced concrete beam and demolition blasting method |
| CN104215136B (en) * | 2014-09-01 | 2016-01-06 | 武汉宏伟交通爆破工程有限公司 | Reinforced beam demolition blasting blast hole projectile filling, blocking and pressure slag structure and demolition blasting method |
| CN104964623A (en) * | 2015-07-01 | 2015-10-07 | 叶建军 | Large-area or large-volume concrete pre-buried blast hole arrangement method and blasting demolition method |
| CN105507611A (en) * | 2015-12-18 | 2016-04-20 | 上海建工七建集团有限公司 | Method for dismantling bottom boards in existing deep foundation pit |
| 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 |
| CN105973085A (en) * | 2016-04-20 | 2016-09-28 | 安徽恒源煤电股份有限公司 | Explosion method capable of preventing misfire while driving in coal mine tunnel |
| CN106088098A (en) * | 2016-06-15 | 2016-11-09 | 龙元建设集团股份有限公司 | Supporting removal construction method |
| CN107560509A (en) * | 2017-09-27 | 2018-01-09 | 贵州安凯达实业股份有限公司 | A kind of explosion attachment structure for photoface exploision |
| CN107843158A (en) * | 2017-11-03 | 2018-03-27 | 北京科技大学 | The construction method of the low vibration velocity exact requirements of Tunnel Blasting is realized with common on-electric detonator |
| CN107843158B (en) * | 2017-11-03 | 2018-10-02 | 北京科技大学 | The construction method of the low vibration velocity exact requirements of Tunnel Blasting is realized with common on-electric detonator |
| CN107843160A (en) * | 2017-12-01 | 2018-03-27 | 武汉科技大学 | A kind of initiation net of deep foundation pit reinforced concrete support beam demolition blasting |
| CN107843160B (en) * | 2017-12-01 | 2024-04-12 | 武汉科技大学 | Detonating network for blasting demolition of reinforced concrete support beam of deep foundation pit |
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Application publication date: 20130703 |