CN108731567A - A kind of method of precast concrete integral module demolition blasting steel angle structure - Google Patents
A kind of method of precast concrete integral module demolition blasting steel angle structure Download PDFInfo
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- CN108731567A CN108731567A CN201810505076.8A CN201810505076A CN108731567A CN 108731567 A CN108731567 A CN 108731567A CN 201810505076 A CN201810505076 A CN 201810505076A CN 108731567 A CN108731567 A CN 108731567A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/02—Particular applications of blasting techniques for demolition of tall structures, e.g. chimney stacks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
- B28B7/346—Manufacture of moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/34—Moulds, cores, or mandrels of special material, e.g. destructible materials
- B28B7/348—Moulds, cores, or mandrels of special material, e.g. destructible materials of plastic material or rubber
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Electrochemistry (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a kind of methods of precast concrete integral module demolition blasting steel angle structure.Step includes：Step 1：Make one piece of mold angle steel identical with dismounting angle steel to be blasted；Step 2：It is assembled into hollow groove-shaped mold based on the mold angle steel；Step 3：Concrete is poured into a mould in hollow groove-shaped mold；Step 4：Pre-buried charging hole during pouring into a mould concrete；Obtain prefabricated powder charge module；Step 5：Precracking is cut at angle steel back to be removed；Step 6：It is packed into pack along the pre-buried charging hole of prefabricated powder charge module；Step 7：The prefabricated powder charge module for having been charged into pack is fixed on angle steel to be removed；Step 8：It detonates after the completion of preparation before explosion.The present invention uses 2# rock emulsion explosives, is easier to obtain compared with control explosive；Prefabricated component production method is simple, and can make prefabricated component in advance before construction, significantly saves time cost, reduces the duration.
Description
Technical field
The invention belongs to engineering explosion technical fields, and in particular to angle steel steel structure member and construction of structures demolition blasting
Method, more particularly to a kind of method of precast concrete integral module demolition blasting steel angle structure.
Background technology
More and more buildings use steel construction at present, as workshop, bridge, terminal, high ferro station, conference and exhibition center, greatly across
Degree, large space, the divisible light steel house etc. used；But with steel construction because planning or service life the reasons needs such as expire are torn open
It removes, traditional Blasting Demolition Technology cannot meet the needs of steel construction dismounting.
Small-sized steel construction is removed, using machine cuts dismounting method and chemical cleavage dismounting method；It is large-scale and super-huge
When steel construction demolition blasting, since its structure sheet is as hollow even template material, powder charge can not be punched, is generally adopted
Demolition blasting is carried out with cumulative blasting Charge, such as using Concentrated charge, the technique of outer charging explosion.
Concentrated charge explosion need to use high brisance detonating explosive, and such explosive is mostly tubing products, civilian to be difficult to realize；Together
When the processing of high brisance detonating explosive Concentrated charge be only capable of jet action in plank Cut blasting, that is, be only capable of joint-cutting on the steel plate
And can not generate big opening makes overall structure destroy unstability.
Outer charging explosion is close to object explosive to be removed and does work ability concentration of local in contact position, is not close to remove object explosive
Energy, which is not applied directly to largely, to be removed on object, is largely flogged a dead horse, and generate explosion wave, blasting flyrock and make an uproar
Sound is all not easy prevention and control, can not implement under the inhabitation of environment complexity and production environment.
The patent document that application for a patent for invention number is 201410202006.7 discloses a kind of tubular steel column structure construction and builds
The blasting demolishing method of object, and in particular to section be a variety of tubular steel column structure components such as matrix pattern, day font and hollow and
The blasting demolishing method of construction of structures, operating procedure are a, the casting concrete inside column steel construction to be blasted；B, concrete
Maintenance；C, blasthole is bored in the positive oxyacetylene metal-cutting of column steel construction；D, the pre- joint-cutting on column steel construction；E, blasting parameter is determined
And powder charge line；F, it protects；G, explosion.The technical solution builds concrete explosion using tubular Inner, is only applicable to cross-sectional area
Larger cylindrical steel structure, construction site casting concrete and curing time are long, and drilling operation destroys casting concrete structure,
Inside concrete damage is unknowable, influences explosive payload and judges and welded under complex environment and to pour operation difficulty big.
Angle steel is that more extensive classification is applied in steel construction, at present still without carrying out demolition blasting for angle steel steel construction
Technique.
Invention content
Present invention seek to address that one of technical problem of the existing technology, special for the structure of steel angle structure construction of structures
Point proposes a kind of method of precast concrete integral module demolition blasting steel angle structure.
Technical solution of the invention is：A kind of method of precast concrete integral module demolition blasting steel angle structure,
Step includes：
Step 1：Make one piece of mold angle steel identical with dismounting angle steel to be blasted；
Step 2：It is assembled into hollow groove-shaped mold based on the mold angle steel；
Step 3：Concrete is poured into a mould in hollow groove-shaped mold；
Step 4：Pre-buried charging hole during pouring into a mould concrete；Obtain prefabricated powder charge module；
Step 5：Precracking is cut at angle steel back to be removed；
Step 6：It is packed into pack along the pre-buried charging hole of prefabricated powder charge module；
Step 7：The prefabricated powder charge module for having been charged into pack is fixed on angle steel to be removed；
Step 8：It detonates after the completion of preparation before explosion.
According to embodiments of the present invention, the concrete operation step of the step 2 is：Mold angle steel is lain against into ground, is used
Two width bottom edge of angle steel and corresponding length sky side are assembled into the hollow groove-shaped mold of u shapes by three block baffles；
The concrete operation step of the step 3 is：Placing concrete in the hollow groove-shaped mold of u shapes；
The concrete operation step of the step 4 is：When concrete casting height is u shape groove height half, in the coagulation poured
The pre-buried pvc pipe of a back cover is put on soil as pre-buried charging hole, pressing pre-buried pvc pipe makes it be absorbed in casting concrete, and
Pre-buried pvc pipe central axes are overlapped with u shape slots central axes；One end closure of pvc pipe, another end opening, pvc pipe sealing are located at concrete
Interior, pvc pipe opening is slightly longer than angle steel；Continue the placing concrete into u shapes hollow groove-shaped mold, until concrete after the completion of sedimentation
Height is contour with two width of angle steel；The concrete of pouring is conserved, waits being demoulded after the completion of conserving, it is hollow to open u shapes
Groove-shaped mold rejects three pieces of planks, obtains the prefabricated powder charge module being made of concrete, pvc pipe and mold angle steel.
According to embodiments of the present invention, the concrete operation step of the step 2 is：Make again one piece it is identical as the step 1
The mold angle steel of size；Two pieces of mold angle steel opening directions, which fix opening direction, becomes a cylindrical hollow girder steel flute profile mould
Tool；
The concrete operation step of the step 3 is：Cylindrical hollow girder steel groove-shaped mold is vertically placed, casting concrete；
The concrete operation step of the step 4 is：Casting concrete height be cylindrical hollow girder steel groove-shaped mold height 1/3 ~
When 1/2, it is vertically inserted into pvc pipe, pvc pipe lower part back cover, upper opening, along cylindrical hollow girder steel groove-shaped mold inner wall and PVC
Continue casting concrete between pipe outer wall, until after sedimentation between column hollow steel beam groove-shaped mold inner wall and pvc pipe outer wall
Space filling is complete；The concrete of pouring is conserved, waits being demoulded after the completion of conserving, rejects one block of mold angle steel, obtain
To the prefabricated powder charge module being made of concrete, pvc pipe and mold angle steel.
According to embodiments of the present invention, pack described in step 6 is 2# rock emulsion explosives and Nonel detonator.
According to embodiments of the present invention, the charging means described in step 6 are underground borehole blasting or continuous charging.
According to embodiments of the present invention, the concrete operation step of the step 2 ~ step 4 is：Mold angle steel is lain against ground
Two width bottom edge of angle steel and corresponding length sky side are assembled into the hollow groove-shaped mold of u shapes by face using three block baffles；In angle steel
Right angle is close to the pre-buried pvc pipe of the pre-buried back cover in angle steel side, and pvc pipe back cover is located in angle steel, pvc pipe is open and angle steel top
Portion is concordant；The placing concrete into u shapes hollow groove-shaped mold covers pvc pipe, is further continued for pouring into the hollow groove-shaped mold of u shapes
Concrete, until concrete height is identical as u shape channel opening height after the completion of sedimentation；The concrete of pouring is conserved, is waited for
Demoulded after the completion of maintenance, open the hollow groove-shaped mold of u shapes and reject three pieces of planks and mold angle steel, obtain by concrete and
The prefabricated eccentric module of overall assembled of pvc pipe composition.
The present invention realizes Prefabricated block assembled demolition blasting steel construction by four key technology points：
1, girder steel mold is made according to steel construction size to be removed, further according to the prefabricated powder charge module of girder steel mold；
2, powder charge module can be directly assembled on steel construction to be torn open；
3, charging hole is reserved in Prefabricated block, and selection dose, charging means, interval mode and interval can be adjusted according to actual conditions
Species type；
4, when the pre-buried pvc pipe central charge of prefabricated powder charge module, pre-buried pvc pipe central axes must be with hollow girder steel central axes weight
It closes；Ensure pvc pipe in hollow girder steel centre；When the pre-buried pvc pipe bias of prefabricated powder charge module is placed, when installation pre-buried pvc pipe
Against waiting for quick-fried angle steel right angle.
Using above-mentioned technical proposal, the advantages of present invention compares existing method, has：
1, it using 2# rock emulsion explosives, is easier to obtain compared with control explosive；
2, explosive utilization rate is high, saves explosive cost, and smaller dose reaches target；
3, choosing multiple charging means and interval mode more make full use of explosive acting ability；
4, explosive is packed into inside angle steel, and explosion generates slungshot and shock wave harm is small, is easy protection；
5, prefabricated component production method is simple, and can make prefabricated component in advance before construction, significantly saves time cost, reduces work
Phase；
6, prefabricated component installation is simple, easy to operate.
Description of the drawings
Fig. 1 is mold angle steel schematic diagram.
Fig. 2 is the hollow groove-shaped mold schematic diagram of u shapes.
Fig. 3 is overall assembled Prefabricated block schematic diagram.
Fig. 4 is that schematic diagram is completed in the assembly of prefabricated powder charge module.
Fig. 5 is prefabricated eccentric powder charge module diagram.
Fig. 6 is that schematic diagram is completed in prefabricated eccentric powder charge module assembly.
In figure：1- mold angle steel；The hollow groove-shaped mold of 2-u shapes；3- overall assembled Prefabricated blocks；The pre-buried pvc pipes of 4-；5-
Dismounting angle steel to be blasted；The pre- joint-cuttings of 6-；7- emulsions.
Specific implementation mode
The present invention is described further with specific implementation method below in conjunction with the accompanying drawings, not to the limit of its protection domain
System.
Embodiment one：
Make one and 5 size of dismounting angle steel to be blasted（80mm*80mm*8mm）Mold angle steel 1 in identical Fig. 1, long 150cm；
Mold angle steel 1 is lain against into ground, using three block baffles by angle steel side and bottom package at the hollow groove-shaped mold 2 of u shapes, wherein
Long baffle seals angle steel side, non-porous side's baffle seals angle steel bottom, trepanning（Diameter 42mm is located at angle steel interface center）Gear
Plate seals at the top of angle steel；The casting concrete in the hollow groove-shaped mold 2 of u shapes（Label 300）, pour after height 2cm from angle steel top
Long 105cm, the pre-buried pvc pipe 4 of diameter 40cm are inserted at portion's perforated baffle；Continue to pour coagulation in the hollow groove-shaped mold of u shapes 2
Soil, until height is identical as angle steel vertical edge after concrete settlement.Three block baffles are removed after concrete curing 28d, are obtained by mold
Angle steel 1, pre-buried pvc pipe 4 and coagulation local soil type at overall assembled Prefabricated block 3.Dismounting angle steel 150cm to be blasted is chosen,
50cm every 5cm to being cut into horizontal and vertical pre- joint-cutting 6 between 100cm（Long 40mm, wide 5mm）, then by overall assembled
Prefabricated block 3 is assembled into assembly as shown in Figure 4 with dismounting angle steel 5 to be blasted and completes structure, uses length 380mm, width
12.6mm nylon binding bands are fixed, each bandage spacing distance 15cm since top.It is packed into medicine along 4 nozzle of pre-buried pvc pipe
It wraps assembly to complete in structure stage casing 50cm, wherein 2# rock emulsion explosives 7 are 150g（Charge positions divide 3 from the 50cm of bottom
Section powder charge, every section of 50g, every section of airspace 15cm）With 3 hair ms-3 Nonel detonators.Carry out stemming blocking, protection, evacuation and
It can detonate after preparation before the detonation such as warning.
1 size of mold angle steel is 80mm*80mm*8mm, long 150cm in embodiment one；Baffle is wooden rectangle baffle,
Thickness 1cm, size are respectively 90mm*90*mm, 90mm*90mm and 90mm*150cm；Cement grade 300 in casting concrete,
Water, sand, cement proportion 1：3：1；4 size of pre-buried pvc pipe is long 105cm, diameter 40cm, wall thickness 3mm；6 long 40mm of pre- joint-cutting,
Wide 5mm, along 5 right angle back of dismounting angle steel to be blasted；Nylon binding belt length 38cm, width 12.6mm；It is filled per the airspaces 15cm
Medicine 50g is packed into 1 hair detonator, uses 150g2# rock emulsion explosives, 3 hair ms-3 Nonel detonators in total.Final test effect is cut
Disconnected length 50cm, destroys length 67cm.
Embodiment two：
Make identical with 5 size of the dismounting angle steel to be blasted mold angle steel of two sizes 1（80mm*80mm*8mm）, long 1500mm；
Two pieces of 1 opening directions of mold angle steel fix every 15cm as a column sky opening direction with 10# zinc plated mild carbon steels silk
Heart girder steel mold；It is poured containing pre-buried pvc pipe 4 in cylindrical hollow girder steel mold（Diameter 40mm）Overall assembled prefabricated molds
Block 3.It is cut into horizontal and vertical pre- joint-cutting 6 in dismounting angle steel 5 to be blasted（Long 35mm, wide 5mm）, then overall assembled is pre-
Molding block 3 and mold angle steel 1 are assembled into assembly as shown in Figure 4 with dismounting angle steel 5 to be blasted and complete structure.Along pre-buried PVC
It is 150g that 4 nozzle of pipe, which is packed into 2# rock emulsion explosives 7,（Charge positions are in the 500mm of stage casing）, blocked, protected, being evacuated and
It can detonate after preparation before the detonation such as warning.
Embodiment three：
Make one and 5 size of dismounting angle steel to be blasted（80mm*80mm*8mm）Mold angle steel 1 in identical Fig. 1, long 150cm；
Mold angle steel 1 is lain against into ground, using three block baffles by angle steel side and bottom package at the hollow groove-shaped mold 2 of u shapes, wherein
Long baffle seals angle steel side, square baffle seals at the top and bottom of angle steel；It is close to right-angle side in angle steel and places long 105cm, diameter
The pre-buried pvc pipe 4 of 40cm, pvc pipe bottom seal, the opening side's of being close to baffle are concordant with angle steel opening；In the hollow groove-shaped mold of u shapes
Casting concrete in 2（Label 300）, cover pre-buried pvc pipe 4；Continue the casting concrete in the hollow groove-shaped mold 2 of u shapes, until
Height is concordant with angle steel vertical edge after concrete settlement.Three block baffles and mold angle steel 1 are removed after concrete curing 28d, obtain by
Pre-buried pvc pipe 4 and coagulation local soil type at eccentric overall assembled Prefabricated block 3.5 length 150cm of dismounting angle steel to be blasted is chosen,
Back is cut into horizontal and vertical pre- joint-cutting 6 every 5cm on the outside of angle steel right angle between at the beginning of 50cm first arrivals 100cm（It is long
40mm, wide 5mm）, then by mold angle steel 1 and 5 clipping bias overall assembled Prefabricated block 3 of dismounting angle steel to be blasted, composition is cut
Face is rectangular long tubular structure to be blasted, and structure is completed in assembly as shown in Figure 6.Use length 380mm, width 12.6mm Buddhist nun
Imperial binding band fixes long tubular structure to be blasted, each bandage spacing distance 15cm since structural top to be blasted.Along pre-
It buries 4 nozzle of pvc pipe to be packed into pack to assembly completion structure stage casing 50cm, wherein 2# rock emulsion explosives 7 are 150g（Powder charge position
It sets from the 50cm of bottom, point 3 sections of powder charges, every section of 50g, every section of airspace 15cm）With 3 hair ms-3 Nonel detonators.Carry out big gun
It can detonate after the preceding preparation of the detonations such as mud blocking, protection, evacuation and warning.
1 size of mold angle steel is 80mm*80mm*8mm, long 150cm in embodiment three；Baffle is wooden rectangle baffle,
Thickness 1cm, size are respectively 90mm*90*mm, 90mm*90mm and 90mm*150cm；Cement grade 300 in casting concrete,
Water, sand, cement proportion 1：3：1；4 size of pre-buried pvc pipe is long 105cm, diameter 40cm, wall thickness 3mm；6 long 40mm of pre- joint-cutting,
Wide 5mm, along 5 right angle back of dismounting angle steel to be blasted；Nylon binding belt length 38cm, width 12.6mm；It is filled per the airspaces 15cm
Medicine 50g is packed into 1 hair detonator, uses 150g2# rock emulsion explosives 7,3 to send out ms-3 Nonel detonators in total.Final test effect
Shearing length 54cm destroys length 70cm.
Claims (6)
1. a kind of method of precast concrete integral module demolition blasting steel angle structure, characterization step include：
Step 1：Make one piece of mold angle steel identical with dismounting angle steel to be blasted；
Step 2：It is assembled into hollow groove-shaped mold based on the mold angle steel；
Step 3：Concrete is poured into a mould in hollow groove-shaped mold；
Step 4：Pre-buried charging hole during pouring into a mould concrete；Obtain prefabricated powder charge module；
Step 5：Precracking is cut at angle steel back to be removed；
Step 6：It is packed into pack along the pre-buried charging hole of prefabricated powder charge module；
Step 7：The prefabricated powder charge module for having been charged into pack is fixed on angle steel to be removed；
Step 8：It detonates after the completion of preparation before explosion.
2. a kind of method of precast concrete integral module demolition blasting steel angle structure according to claim 1, feature
The concrete operation step for being the step 2 is：Mold angle steel is lain against into ground, using three block baffles by two width bottom edge of angle steel
It is assembled into the hollow groove-shaped mold of u shapes with corresponding length sky side；
The concrete operation step of the step 3 is：Placing concrete in the hollow groove-shaped mold of u shapes；
The concrete operation step of the step 4 is：When concrete casting height is u shape groove height half, in the coagulation poured
The pre-buried pvc pipe of a back cover is put on soil as pre-buried charging hole, pressing pre-buried pvc pipe makes it be absorbed in casting concrete, and
Pre-buried pvc pipe central axes are overlapped with u shape slots central axes；One end closure of pvc pipe, another end opening, pvc pipe sealing are located at concrete
Interior, pvc pipe opening is slightly longer than angle steel；Continue the placing concrete into u shapes hollow groove-shaped mold, until concrete after the completion of sedimentation
Height is contour with two width of angle steel；The concrete of pouring is conserved, waits being demoulded after the completion of conserving, it is hollow to open u shapes
Groove-shaped mold rejects three pieces of planks, obtains the prefabricated powder charge module being made of concrete, pvc pipe and mold angle steel.
3. a kind of method of precast concrete integral module demolition blasting steel angle structure according to claim 1, feature
The concrete operation step for being the step 2 is：The mold angle steel of one piece of size identical as the step 1 is made again；By two pieces of moulds
Have angle steel opening direction to fix as a cylindrical hollow girder steel groove-shaped mold opening direction；
The concrete operation step of the step 3 is：Cylindrical hollow girder steel groove-shaped mold is vertically placed, casting concrete；
The concrete operation step of the step 4 is：Casting concrete height be cylindrical hollow girder steel groove-shaped mold height 1/3 ~
When 1/2, it is vertically inserted into pvc pipe, pvc pipe lower part back cover, upper opening, along cylindrical hollow girder steel groove-shaped mold inner wall and PVC
Continue casting concrete between pipe outer wall, until after sedimentation between column hollow steel beam groove-shaped mold inner wall and pvc pipe outer wall
Space filling is complete；The concrete of pouring is conserved, waits being demoulded after the completion of conserving, rejects one block of mold angle steel, obtain
To the prefabricated powder charge module being made of concrete, pvc pipe and mold angle steel.
4. a kind of method of precast concrete integral module demolition blasting steel angle structure according to claim 1, feature
Be pack described in step 6 it is 2# rock emulsion explosives and Nonel detonator.
5. a kind of method of precast concrete integral module demolition blasting steel angle structure according to claim 1, feature
Be charging means described in step 6 it is underground borehole blasting or continuous charging.
6. a kind of method of precast concrete integral module demolition blasting steel angle structure according to claim 1, feature
The concrete operation step for being the step 2 ~ step 4 is：Mold angle steel is lain against into ground, it is using three block baffles that angle steel two is wide
Degree bottom edge and corresponding length sky side are assembled into the hollow groove-shaped mold of u shapes；Right angle is close to pre-buried one of angle steel side in angle steel
The pre-buried pvc pipe of back cover, pvc pipe back cover is located in angle steel, pvc pipe opening is concordant at the top of angle steel；Toward the hollow groove-shaped mold of u shapes
Middle placing concrete covers pvc pipe, is further continued for the placing concrete into u shapes hollow groove-shaped mold, until coagulation after the completion of sedimentation
Native height is identical as u shape channel opening height；The concrete of pouring is conserved, waits being demoulded after the completion of conserving, opens u shapes
Hollow groove-shaped mold rejects three pieces of planks and mold angle steel, and it is prefabricated partially to obtain the overall assembled being made of concrete and pvc pipe
Core module.
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| JP2005179924A (en) * | 2003-12-16 | 2005-07-07 | Sumitomo Mitsui Construction Co Ltd | Method for blowing up and demolishing reinforced concrete structure |
| US20140318335A1 (en) * | 2013-04-24 | 2014-10-30 | Kacoh Co., Ltd. | Steel-structure demolition method |
| CN103938888A (en) * | 2014-05-14 | 2014-07-23 | 中钢集团武汉安全环保研究院有限公司 | Blasting demolition method for cylindrical steel column structure buildings |
| 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 |
| CN105823386A (en) * | 2016-06-03 | 2016-08-03 | 武汉科技大学 | Method for blasting demolition of reinforced concrete supporting beam in foundation pit |
| CN107858941A (en) * | 2017-11-16 | 2018-03-30 | 南京交通工程有限公司 | A kind of hydraulic pressure demolition removes Prestressed Continuous Box Beam bridge construction technique |
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