CN103938888B - The blasting demolishing method of a kind of tubular steel column structure construction of structures - Google Patents
The blasting demolishing method of a kind of tubular steel column structure construction of structures Download PDFInfo
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- CN103938888B CN103938888B CN201410202006.7A CN201410202006A CN103938888B CN 103938888 B CN103938888 B CN 103938888B CN 201410202006 A CN201410202006 A CN 201410202006A CN 103938888 B CN103938888 B CN 103938888B
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Abstract
The invention belongs to engineering explosion technical field, be specifically related to section be matrix pattern, day font and the blasting demolishing method of the multiple tubular steel column structure component such as hollow and construction of structures.Its characterization step is: a, at the inner concreting 2 of column steel work 1 to be blasted; The maintenance of b, concrete 2; C, bore big gun hole 3 in the front oxyacetylene metal-cutting of column steel work 1; D, on column steel work 1 pre-joint-cutting 7; E, determine blasting parameter and powder charge line; F, protection; G, explosion.By effective enforcement of the blasting demolishing method of tubular steel column structure construction of structures, the object utilizing industrial explosive material (emulsion) demolition blasting tubular steel column structure component or construction of structures can be reached, have technical advantage safe, efficient, with low cost relative to Traditional Man means of removing.
Description
Technical field
The invention belongs to engineering explosion technical field, be specifically related to section be matrix pattern, day font and the blasting demolishing method of the multiple tubular steel column structure component such as hollow and construction of structures.
Background technology
Along with the high speed development of China's city process, steel make firm structural element and construction of structures flourish and play leading role at numerous areas as a kind of recyclable materials, and the tubular steel column structure particularly formed by i iron and Plate Welding is widely applied especially in building construction, production platform, vestibule, gate, device framework, tower crane, blast furnace, heating furnace, cold bed, transmission equipment etc.But because the development of China long strands is more late, the project that starts in early days is more, face the problem that a large amount of steel structure member and construction of structures need functional reconstruction or dismounting at present.As faced fired power generating unit, the blast furnace and reformer etc. of below the 30mkw of dismounting in " energy-saving and emission-reduction, upper large pressure little " process).Because steel structure material intensity is large, and steel beam column and steel structure complex structure, dismounting difficulty is large.At present domestic primary stage steel work dismounting still being rested on to manual demolition, labour intensity is large, inefficiency, construction risk are large.In manual demolition process, easily cave-in accident occurs, the remaining framework after accident needs to remove, but accident causes steel beam column hook to uphang and structural instability, does not possess condition that is artificial or mechanical removal, can only adopt demolition blasting.Because its structure is originally as hollow or even template material when demolition blasting steel dielectric member or construction of structures, explosion of cannot punching, only can adopt the blasting technology of external application Concentrated charge, and the explosion of external application Concentrated charge has obvious technological deficiency.
1, civil explosive explosion velocity is low, and the Concentrated charge of processing cannot penetrate Steel material at all.
2, military explosive is tubing products, and the Concentrated charge of military explosive processing simultaneously only can be used for sheet material Cut blasting, namely only on steel plate, can cannot produce big uncork by joint-cutting.
3, the military Concentrated charge explosion of external application only can carry out the joint-cutting work of " mouth " font steel column, then helpless for special-shaped column constructions such as " day " font and sphere of movements for the elephants types.
4, the capacity loss of outer charging explosion own is high, and the explosion wave of generation, blasting flyrock and noise all not easily prevention and control, cannot implement under the inhabitation of circumstance complication and production environment.
Summary of the invention
The object of the invention is to provide a kind of method adopting the construction of structures of industrial explosive material demolition blasting tubular steel column structure for the deficiencies in the prior art.
Technical solution of the present invention is: the method for a kind of demolition blasting tubular steel column structure construction of structures, the steps include: a, at the inner concreting of column steel work to be blasted; B, concrete maintenance; C, bore big gun hole in the front oxyacetylene metal-cutting of column steel work; D, on column steel work pre-joint-cutting; E, determine blasting parameter and powder charge line; F, protection; G, explosion.
Described method reaches by three key problem in technology points the object utilizing industrial explosive material demolition blasting tubular steel column structure component or construction of structures, and 1, inject the concrete mortar of high strength in column steel work inside; 2, pre-joint-cutting on column steel work; 3, reinforced protection method, controlled blasting flying.
The effect of injecting strong concrete mortar in steel column inside is: 1. concrete mortar is injected in steel column inside increases enabling capabilities temporarily, and concrete perfusion position appropriateness cutting can ensure its enabling capabilities simultaneously; 2. the shock wave that blast produces is passed to steel medium; 3. retrain the expansion energy of detonation gas, and utilize concrete outwards to expand to be passed to steel medium.
The effect of pre-joint-cutting on column steel work: provide certain enabling capabilities after interior filling concrete formation, can ensure that, after the steel column of incision is cut by appropriateness, steel column structure is still stable.Pretreatment work main purpose is the material structural strength that local weakens steel column, has met the needs of explosion opening, and be divided into transverse cuts and vertical cutting two kinds of modes, cutting principle is:
1. after punching completes, must complete before blast charging, after avoiding pretreatment, still long-term leaving unused causes local distortion even unstability;
2. pre-joint-cutting should not cut off and avoid producing steel disc explosion flying;
3. both sides, big gun hole need be done cross sections but should not be through.
By reinforced protection method, controlled blasting flying:
1. absorb by close order safety net and cotton-wadded quilt the shock wave provided at blasting cut position;
2. the energy by putting outside gauze wire cloth constraint detonation gas;
3. by steel plate fragment and the concrete fragment of wall of sandbags Control strain.
The invention has the beneficial effects as follows: by effective enforcement of the blasting demolishing method of tubular steel column structure construction of structures, the object utilizing industrial explosive material (emulsion) demolition blasting tubular steel column structure component or construction of structures can be reached, have technical advantage safe, efficient, with low cost relative to Traditional Man means of removing.
Accompanying drawing explanation
Fig. 1 is the demolition blasting guidance diagram of tubular steel column structure construction of structures.
Fig. 2 is overcoat schematic diagram.
In figure: 1. column steel work, 2. concrete, 3. big gun hole, 4. primer detonator, 5. emulsion, 6. stemming, 7. pre-joint-cutting, 8. overcoat, 9. protect sandbag, 10. cotton-wadded quilt, 11. gauze wire cloths, 12. sun-proof nets.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further.
A method for demolition blasting tubular steel column structure construction of structures, the steps include: a, at the inner concreting 2 of column steel work 1 to be blasted; The maintenance of b, concrete 2; C, bore big gun hole 3 in the front oxyacetylene metal-cutting of column steel work 1; D, on column steel work 1 pre-joint-cutting 7; E, determine blasting parameter and powder charge line; F, protection; G, explosion.
In the step of the inner concreting 2 of column steel work 1 to be blasted be: at column steel work 1 lateral opening segmentation blanking concreting 2, extended distance is advisable (depending on having non-inductive windings and clapboard spacing in steel column) at 1m ~ 1.5m.Along with the rising of height built by column steel work 1, the water/binder ratio of concrete 2 and slump should be successively decreased, column steel work 1 is built Shi Yingxian building bottom pour mold and is built the cement mortar of one deck 50 ~ 100mm or the stone concrete that reduces by half, column steel work 1 layering blanking tamping, lift height is not more than 50cm, can knock to reduce the generation of honeycomb outside column with sledgehammer if do not possessed tamping condition, column steel work 1 answers one-time-concreting complete.Build height and should be greater than Blasting height at least 1m.
Concrete 2 is built in rear 3 ~ 12h and is started water seasoning, and curing time is no less than 15 days (at least should ensure drilling via formations).When temperature is more than 15 DEG C, initial 5 days that build, daytime is at least per hour watered once, waters night 2 times, after this waters every day more than 5 times.High temperature or arid climate suitably should increase irrigation times.When daily mean temperature must not water lower than when 5 DEG C.
Concrete 2 has been built and within latter 15 days, can have been carried out step c boring and steps d pretreatment construction.
Bore big gun hole 3 degree of depth l=0.7 × L, (L is that the post in punching direction is wide), pitch-row a=0.2 × L, array pitch b=0.15 × L, big gun hole 3 can adopt rectangular cloth hole.Unit consumption gets 18kg/m3.Networking connected mode and detonation mode can not have specific requirement surely because of construction environment.
Pre-joint-cutting 7 is finedraws of transverse cuts and longitudinally cutting, the laterally pre-joint-cutting 7 of the both sides cutting in each big gun hole 3, at three the face cuttings longitudinally pre-joint-cutting 7 without boring.
In big gun hole 3, load primer detonator 4 and emulsion 5, block with stemming 6 subsequently.
The main blasting damage needing reply of step f protection is blasting flyrock, even likely has steel disc flying to comprise wherein, is covered as master in protection process with nearly body.
Protection adopts overcoat 8 and protection sandbag 9, and overcoat 8 wraps up column steel work 1, and pile protection sandbag 9 outside overcoat 8, overcoat 8 is made by cotton-wadded quilt 10, gauze wire cloth 11, sun-proof net 12.
Protection sandbag 9 meets following condition: without rare shelves, fracture of wire, adhesion, tape edge is without run-bake-needle fault, broken string or do not sew convolution place, load-carrying 25 ~ 50kg, pull-off force direction of warp and weft is respectively and is not less than 650N/50mm, base or side seam direction are not less than 300N/50mm, pack from the tenesmus of 1.2m place not damaged with packaging, packing material is qualified without leakage.
Gauze wire cloth 11 meets following condition: hole: 50mm string diameter: 3mm, embroider net.
Sun-proof net 12 meets following condition: the stretching of mechanical strength 50 mm wide is strong >=and 250 newton.Every 25 millimeters of lacing radicals are 14.
Claims (10)
1. a method for demolition blasting tubular steel column structure construction of structures, its characterization step is: a, the inner concreting of column steel work (1) to be blasted (2); The maintenance of b, concrete (2); C, bore big gun hole (3) in the front oxyacetylene metal-cutting of column steel work (1); D, at the upper pre-joint-cutting (7) of column steel work (1); E, determine blasting parameter and powder charge line; F, protection; G, explosion.
2. the method for a kind of demolition blasting tubular steel column structure according to claim 1 construction of structures, it is characterized in that in the step of the inner concreting of column steel work (1) to be blasted (2) be: a, at column steel work (1) lateral opening, extended distance is at 1m ~ 1.5m; B, segmentation blanking concreting (2), the cement mortar of one deck 50 ~ 100mm or the stone concrete that reduces by half is built building bottom pour mold when column steel work (1) is built, column steel work (1) layering blanking tamping, along with the rising of height built by column steel work (1), water/binder ratio and the slump of concrete (2) are successively decreased.
3. the method for a kind of demolition blasting tubular steel column structure according to claim 2 construction of structures, is characterized in that building of column steel work (1) is highly greater than Blasting height at least 1m.
4. the method for a kind of demolition blasting tubular steel column structure according to claim 2 construction of structures, is characterized in that the lift height of column steel work (1) layering blanking is not more than 50cm.
5. the method for a kind of demolition blasting tubular steel column structure according to claim 1 construction of structures, it is characterized in that concrete (2) is built in rear 3 ~ 12h and start water seasoning, curing time is no less than 15 days.
6. the method for a kind of demolition blasting tubular steel column structure according to claim 1 construction of structures, is characterized in that big gun hole (3) adopts rectangular arrangement, and drilling depth l=0.7L, pitch-row a=0.2 × L, array pitch b=0.15 × L, L is that the post in punching direction is wide.
7. the method for a kind of demolition blasting tubular steel column structure according to claim 1 construction of structures, is characterized in that pre-joint-cutting (7) is the finedraw of transverse cuts and longitudinally cutting.
8. the method for a kind of demolition blasting tubular steel column structure according to claim 7 construction of structures, is characterized in that at the both sides of each big gun hole (3) cutting laterally pre-joint-cutting (7), at three the face cuttings longitudinally pre-joint-cutting (7) without boring.
9. the method for a kind of demolition blasting tubular steel column structure according to claim 1 construction of structures, it is characterized in that protection adopts overcoat (8) and protection sandbag (9), overcoat (8) parcel column steel work (1), at overcoat (8) outside pile protection sandbag (9), overcoat (8) is made by cotton-wadded quilt (10), gauze wire cloth (11), sun-proof net (12).
10. the method for a kind of demolition blasting tubular steel column structure according to claim 1 construction of structures, is characterized in that filling primer detonator (4) and emulsion (5) in big gun hole (3), blocks with stemming (6).
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| CN201410202006.7A CN103938888B (en) | 2014-05-14 | 2014-05-14 | The blasting demolishing method of a kind of tubular steel column structure construction of structures |
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| CN201410202006.7A CN103938888B (en) | 2014-05-14 | 2014-05-14 | The blasting demolishing method of a kind of tubular steel column structure construction of structures |
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| CN103938888B true CN103938888B (en) | 2016-01-27 |
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| CN107328328A (en) * | 2017-08-24 | 2017-11-07 | 徐州雷鸣民爆器材有限公司 | The blasting method of steel construction |
| CN108731566B (en) * | 2018-05-24 | 2023-04-28 | 中钢集团武汉安全环保研究院有限公司 | Method for blasting demolishing angle steel structure of prefabricated granular medium module |
| CN108731564B (en) * | 2018-05-24 | 2023-04-28 | 中钢集团武汉安全环保研究院有限公司 | Method for blasting demolishing angle steel structure of precast concrete split module |
| CN108731565B (en) * | 2018-05-24 | 2023-05-09 | 中钢集团武汉安全环保研究院有限公司 | Prefabricated module and method for blasting demolition of H-shaped steel structure |
| CN108759600B (en) * | 2018-05-24 | 2023-05-26 | 中钢集团武汉安全环保研究院有限公司 | Method for blasting demolishing angle steel structure of prefabricated water medium module |
| CN108731567B (en) * | 2018-05-24 | 2023-05-09 | 中钢集团武汉安全环保研究院有限公司 | Method for blasting demolishing angle steel structure of precast concrete integral module |
| CN108915295A (en) * | 2018-07-03 | 2018-11-30 | 中国人民解放军陆军工程大学 | Blasting demolition method for cylindrical steel column structure building |
| 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 |
| 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 |
| 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 |
| 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 |
| CN109266799A (en) * | 2018-10-23 | 2019-01-25 | 中国十九冶集团有限公司 | Method for directionally dumping and dismantling blast furnace with frame |
| CN112880507B (en) * | 2021-02-09 | 2022-09-09 | 江西荣达爆破新技术开发有限公司 | Perforation explosive charging explosion method suitable for blasting demolition of middle shear wall |
| CN115559560B (en) * | 2022-10-08 | 2023-07-07 | 江汉大学 | Method for dismantling profile steel concrete upright post |
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| JP5189397B2 (en) * | 2008-04-01 | 2013-04-24 | 株式会社竹中工務店 | Method of dismantling hollow tower structure |
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| CN1040074A (en) * | 1988-07-30 | 1990-02-28 | 斯科钦斯基矿业学院 | Utilize the method for blast crushing kinds of rock |
| CN1757861A (en) * | 2005-11-03 | 2006-04-12 | 中国人民解放军理工大学工程兵工程学院 | Linear energy connectracting cutting disassembling method of steel structured factory building |
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Effective date of registration: 20211202 Address after: 430081 office a210, building 47, No. 1244, Heping Avenue, Qingshan District, Wuhan City, Hubei Province Patentee after: China Railway 23rd Bureau Group (Hubei) blasting Co.,Ltd. Address before: 430081 No. 1244 Heping Avenue, Qingshan District, Hubei, Wuhan Patentee before: SINOSTEEL CORPORATION WUHAN SAFETY AND ENVIRONMENTAL PROTECTION RESEARCH INSTITUTE Co.,Ltd. |