CN108759600B - Method for blasting demolishing angle steel structure of prefabricated water medium module - Google Patents
Method for blasting demolishing angle steel structure of prefabricated water medium module Download PDFInfo
- Publication number
- CN108759600B CN108759600B CN201810505033.XA CN201810505033A CN108759600B CN 108759600 B CN108759600 B CN 108759600B CN 201810505033 A CN201810505033 A CN 201810505033A CN 108759600 B CN108759600 B CN 108759600B
- Authority
- CN
- China
- Prior art keywords
- angle steel
- pvc pipe
- plastic cuboid
- cylindrical die
- plastic
- Prior art date
- 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.)
- Active
Links
Images
Classifications
-
- 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
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Pipe Accessories (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a method for blasting demolition of an angle steel structure of a prefabricated water medium module. Step 1: manufacturing auxiliary angle steel; step 2: welding the auxiliary angle steel and the angle steel to be blasted and dismantled into a rectangular hollow cylindrical steel girder; step 3: seamless welding is carried out on the bottom of the hollow cylindrical steel girder; step 4: the back of the angle steel to be dismantled is transversely cut into pre-cracks; step 5: manufacturing a plastic cuboid cylindrical die; step 6: welding a pre-buried PVC pipe at the bottom of the plastic cuboid cylindrical die; step 7: filling an aqueous medium between the inner wall of the plastic cuboid cylindrical die and the outer wall of the embedded PVC pipe; step 8: a hot-melt seal is arranged between the outer walls of the PVC pipes at the opening of the plastic cuboid cylindrical die; step 9: filling stemming into the bottom of the pre-buried PVC pipe to obtain a prefabricated water medium charging module; step 10: and loading the prefabricated water medium charging module into the hollow cylindrical steel beam, and detonating. The invention uses emulsion explosive, which is easier to obtain than the tube explosive; explosive is filled into the angle steel, flying stones and shock waves generated by explosion are less in harm, and the protection is easy.
Description
Technical Field
The invention belongs to the technical field of engineering blasting, in particular to the technical field of blasting demolition of angle steel structural members and building structures, and particularly relates to a method for blasting demolition of an angle steel structure by a prefabricated water medium module.
Background
When the steel medium member or the building structure is demolished by blasting, the steel medium member or the building structure cannot be perforated, charged and blasted due to the hollow structure and even plate-shaped material, and only the processes of explosive charge collection, explosive charge external application and concrete blasting in a welded cylinder can be adopted.
The above process has obvious technical drawbacks.
1. The explosive-gathering bag is blasted by adopting high-intensity Gao Baosu explosive, most of the explosive is a tube product, and the civil use is difficult to realize; meanwhile, the shaped explosive package processed by the high-intensity and high-explosion-speed explosive can only jet flow to act on the blasting cutting of the sheet material, namely, only a cutting joint can be formed on a steel plate, and a large opening cannot be produced, so that the whole structure is damaged and unstably.
2. The explosive powder blasting of the external application explosive bag is closely attached to the explosive of the object to be removed, the function is locally concentrated at the contact position, most of the energy of the explosive which is not closely attached to the object to be removed does not directly act on the object to be removed, most of the energy does idle work, and the generated blast shock wave, blasting flying stone and noise are not easy to prevent and control and cannot be implemented in living and production environments with complex environments.
3. The cylindrical internal concrete blasting is only suitable for cylindrical steel structures with larger cross-sectional areas, the construction site concrete pouring and maintenance time is long, the poured concrete structure is damaged by the punching operation, the damage in the concrete is unknown, the judgment of the loading capacity is affected, and the welding and pouring operation difficulty is high in a complex environment.
Disclosure of Invention
The invention provides a method for blasting demolition of an angle steel structure of a prefabricated water medium module in order to overcome the defects of the prior art.
The technical scheme of the invention is as follows: a method for blasting demolition of angle steel structure of prefabricated water medium module includes the steps:
step 1: manufacturing an auxiliary angle steel piece identical to the angle steel to be blasted and dismantled;
step 2: welding the long side of the auxiliary angle steel with the angle steel to be blasted and dismantled to form a hollow cylindrical steel beam with a rectangular section;
step 3: the bottom of the hollow cylindrical steel girder is welded in a seamless way by using a steel gasket which is made of the same material as the angle steel;
step 4: the back of the angle steel to be dismantled is transversely cut into pre-cracks;
step 5: manufacturing a plastic cuboid cylindrical die by taking two side data of blasting demolishing angle steel as length and width, wherein the bottom of the box-shaped die is sealed, and the upper end of the box-shaped die is opened;
step 6: welding an embedded PVC pipe with the same length as the cylindrical mold at the bottom of the plastic cuboid cylindrical mold, wherein the central axis of the PVC pipe is overlapped with the plastic cuboid cylindrical mold;
step 7: erecting a plastic cuboid cylindrical die, and filling an aqueous medium between the inner wall of the plastic cuboid cylindrical die and the outer wall of the embedded PVC pipe along an upper end opening until the aqueous medium fills the space between the inner wall of the plastic cuboid cylindrical die and the outer wall of the embedded PVC pipe, so that the die and the embedded PVC pipe are kept in a vertical state all the time;
step 8: a plastic plate is used for sealing the opening of the plastic cuboid cylindrical die by hot melting between the inner wall of the die filled with the water medium and the outer wall of the PVC pipe;
step 9: filling stemming along the mouth of the PVC pipe to the bottom of the pre-buried PVC pipe, filling a medicine bag along the upper end opening of the pre-buried PVC pipe according to the design dosage, and blocking the mouth of the PVC pipe with the stemming to obtain a prefabricated water medium medicine filling module;
step 10: and loading the prefabricated water medium charging module into the hollow cylindrical steel beam, and detonating after the preparation work before blasting such as warning, protection and the like is completed.
The prefabricated module assembled blasting demolition steel structure is realized through four key technical points:
1. welding angle steel to be dismantled into a steel beam;
2. manufacturing a charging mould, and reserving charging holes before pouring an aqueous medium in the mould;
3. the prefabricated module is internally reserved with a charge hole, and the dosage, the charge mode, the interval mode and the spacer type can be adjusted and selected according to actual conditions;
4. the central axis of the embedded PVC pipe is required to coincide with the central axis of the die; ensure that the PVC pipe is at the center of the die.
By adopting the technical scheme, the invention has the advantages compared with the existing method that:
1. the 2# rock emulsion explosive is easier to obtain than the controlled explosive;
2. the utilization rate of the explosive is high, the cost of the explosive is saved, and the smaller dosage reaches the expected target;
3. multiple charging modes and interval modes can be selected, and the explosive is used as the functional force more fully;
4. explosive is filled into the angle steel, flying stones and shock waves generated by explosion are less harmful, and the protection is easy;
5. the materials are easy to obtain.
Drawings
Fig. 1 is a schematic view of a hollow cylindrical steel girder.
FIG. 2 is a plan view of a prefabricated aqueous medium charge module.
Fig. 3 is a schematic view of the assembly of a preformed particulate media charge module.
In the figure: 1-attaching angle steel; 2, demolishing angle steel to be blasted; 3-steel gaskets; 4-stemming; 5-embedding a PVC pipe; 6-pre-lancing; 7-water; 8-a plastic cuboid mold; 9-emulsifying explosive; 10-detonating tube detonator; 11-plastic hot melt plate.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description, without limiting the scope of protection.
The method for blasting demolishing the angle steel structure of the prefabricated water medium module comprises the following steps of 1, manufacturing an auxiliary angle steel 1 with the same size as the angle steel 2 to be blasted demolished (80 mm x 8 mm), and 150cm long; aligning the long side of the auxiliary angle steel 1 corresponding to the long side and the short side of the angle steel 2 to be blasted and removed, welding into a hollow cylindrical steel beam by using electric welding, and sealing the bottom of the hollow steel beam by using a steel gasket 3; cutting transverse and longitudinal pre-cutting slits 6 (40 mm long and 5mm wide) at intervals of 5cm from the outer side of the angle steel 2 to be blasted and dismantled with the length of the hollow steel beam between 60cm and 90 cm; customizing a plastic cuboid cylindrical die 8 with the cross section size of 78 x 78cm, the thickness of 3mm and the length of 150cm; a pre-buried PVC pipe 5 with the length of 150cm and the diameter of 40mm is welded at the bottom of the mould along the central axis of the plastic cuboid cylindrical mould 8; injecting water 7 between the inner wall of the plastic cuboid cylindrical die 8 and the outer wall of the embedded PVC pipe 5, and keeping the embedded PVC pipe 5 at the center of the central axis of the plastic cuboid cylindrical die 8 until the water 7 fills the space between the inner wall of the plastic cuboid cylindrical die 8 and the outer wall of the embedded PVC pipe 5; a plastic hot-melt plate 11 is used for hot-melt sealing the opening of the plastic cuboid cylindrical die 8 between the inner wall of the die filled with the water 7 medium and the outer wall of the PVC pipe, so that water is prevented from leaking; filling stemming 4 to the bottom of the pipe along the opening of the embedded PVC pipe 5, filling the length of the stemming to 65cm, filling blasting powder bags into the bottom of the stemming along the opening of the embedded PVC pipe 5, wherein the blasting powder bags comprise a number 2 rock emulsion explosive 9 of 150g and a number 1 ms-3 detonating tube detonator 10, pulling out the detonating tube, and blocking the stemming 4 along the opening of the embedded PVC pipe 5 until the embedded PVC pipe 5 is fully blocked to obtain the prefabricated water medium charging module. The length and width of the prefabricated water medium charging module are correspondingly placed into the hollow steel beam, the explosive package position corresponds to the pre-cutting 6 position, the prefabricated water medium charging module and the hollow steel beam are fixed by using nylon wire belts with the length of 380mm and the width of 12.6mm, and the interval distance between each two belts is 15cm from the top. The detonation can be performed after the preparation work before the detonation, such as protection, evacuation, warning and the like.
In the embodiment 1, the auxiliary angle steel 1 is 80mm in size, 8mm in size and 150cm in length; the size of the back cover steel electric sheet 3 is 10cm x 1cm; the length of the pre-cutting joint 6 is 40mm, the width is 5mm, and the pre-cutting joint is along the right-angle back of the angle steel 2 to be removed; the plastic cuboid cylindrical die 8 is made of polypropylene, and the cross section size is 78 x 78cm, the thickness is 3mm and the length is 150cm; the size of the embedded PVC pipe 5 is 150cm long, 40cm in diameter and 3mm in wall thickness; 50g of each 15cm stemming 4 is charged at intervals, 1 detonator is charged, and 150g of No. 2 rock emulsion explosive 9 and 3 ms-3 detonating tube detonator 10 are used in total. The final test effect cut-off length was 63cm and the break length was 73cm.
Claims (1)
1. A method for blasting demolition of angle steel structure of prefabricated water medium module is characterized by comprising the following steps:
step 1: manufacturing an auxiliary angle steel piece identical to the angle steel to be blasted and dismantled;
step 2: welding the long side of the auxiliary angle steel with the angle steel to be blasted and dismantled to form a hollow cylindrical steel beam with a rectangular section;
step 3: the bottom of the hollow cylindrical steel girder is welded in a seamless way by using a steel gasket which is made of the same material as the angle steel;
step 4: pre-cracking is transversely cut at the back of the angle steel to be blasted and dismantled;
step 5: manufacturing a plastic cuboid cylindrical mold by taking two edge data of angle steel to be blasted and dismantled as length and width, wherein the bottom of the plastic cuboid cylindrical mold is sealed, and the upper end of the plastic cuboid cylindrical mold is opened;
step 6: welding an embedded PVC pipe with the same length as the plastic cuboid cylindrical die at the bottom of the plastic cuboid cylindrical die, wherein the central axis of the embedded PVC pipe is overlapped with the plastic cuboid cylindrical die;
step 7: erecting a plastic cuboid cylindrical die, and filling an aqueous medium between the inner wall of the plastic cuboid cylindrical die and the outer wall of the embedded PVC pipe along an upper end opening until the aqueous medium fills the space between the inner wall of the plastic cuboid cylindrical die and the outer wall of the embedded PVC pipe, so that the plastic cuboid cylindrical die and the embedded PVC pipe are kept in a vertical state all the time;
step 8: a plastic plate is used for sealing the opening of the plastic cuboid cylindrical die by hot melting between the inner wall of the plastic cuboid cylindrical die filled with the water medium and the outer wall of the embedded PVC pipe;
step 9: filling stemming along the pipe orifice of the embedded PVC pipe to the pipe bottom of the embedded PVC pipe, filling a medicine bag along the upper end opening of the embedded PVC pipe according to the design dosage, and blocking the pipe orifice of the embedded PVC pipe by using the stemming to obtain a prefabricated water medium charging module;
step 10: and loading the prefabricated water medium charging module into the hollow cylindrical steel beam, and detonating after the preparation work before blasting is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810505033.XA CN108759600B (en) | 2018-05-24 | 2018-05-24 | Method for blasting demolishing angle steel structure of prefabricated water medium module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810505033.XA CN108759600B (en) | 2018-05-24 | 2018-05-24 | Method for blasting demolishing angle steel structure of prefabricated water medium module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108759600A CN108759600A (en) | 2018-11-06 |
| CN108759600B true CN108759600B (en) | 2023-05-26 |
Family
ID=64005502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810505033.XA Active CN108759600B (en) | 2018-05-24 | 2018-05-24 | Method for blasting demolishing angle steel structure of prefabricated water medium module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108759600B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665474A (en) * | 2020-12-22 | 2021-04-16 | 武汉爆破有限公司 | Green construction process for horizontal concrete supporting structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2904338C2 (en) * | 1979-02-06 | 1982-05-13 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Method of destroying concrete walls or the like. Objects made of similar material due to the effects of explosions |
| JP6160859B2 (en) * | 2013-04-24 | 2017-07-12 | 株式会社カコー | Steel structure dismantling method |
| CN103938888B (en) * | 2014-05-14 | 2016-01-27 | 中钢集团武汉安全环保研究院有限公司 | The blasting demolishing method of a kind of tubular steel column structure construction of structures |
| CN104404965A (en) * | 2014-11-05 | 2015-03-11 | 浙江海洋学院 | Method for removing reinforced concrete support beams in foundation pit support |
| 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 |
| CN107858941B (en) * | 2017-11-16 | 2019-06-28 | 南京交通工程有限公司 | A kind of hydraulic pressure demolition dismounting Prestressed Continuous Box Beam bridge construction technique |
-
2018
- 2018-05-24 CN CN201810505033.XA patent/CN108759600B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108759600A (en) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103938888B (en) | The blasting demolishing method of a kind of tubular steel column structure construction of structures | |
| CN109915138A (en) | Spontaneous fire seam cuts top self-contained lane without pillar mining method | |
| CN108759600B (en) | Method for blasting demolishing angle steel structure of prefabricated water medium module | |
| CN102692164B (en) | Stress unloading, water injecting and drilling and blasting method for longitudinal structure surface structural strong rockburst regions | |
| CN103983147A (en) | Permafrost region road tunnel peripheral hole blasting construction method | |
| CN106197178A (en) | A kind of novel deep hole water pressure blasting demolition set and blasting method | |
| CN104895574A (en) | Construction method for controlling large cross section tunnel blasting vibration velocity | |
| CN108731566B (en) | Method for blasting demolishing angle steel structure of prefabricated granular medium module | |
| CN111219190A (en) | Method for directional roof cutting by energy-gathered water pressure blasting | |
| CN103822555A (en) | Blasting method in reinforcing and reconstructing construction of hydraulic engineering | |
| CN108731565B (en) | Prefabricated module and method for blasting demolition of H-shaped steel structure | |
| CN108547472B (en) | Prefabricated module of angle steel structure is demolishd in blasting | |
| CN104215136B (en) | Reinforced beam demolition blasting blast hole projectile filling, blocking and pressure slag structure and demolition blasting method | |
| CN208333273U (en) | A kind of prefabricated aqueous medium module of demolition blasting steel angle structure | |
| CN208567660U (en) | A kind of preformed particles medium module of demolition blasting steel angle structure | |
| CN108061492A (en) | A kind of Pile Diameter is the bridge cylinder pile foundation blasting method of 0.8-1m | |
| CN208263085U (en) | A kind of precast concrete integral module of demolition blasting steel angle structure | |
| CN208432159U (en) | A kind of Prefabricated block of demolition blasting H profile steel structure | |
| CN108731564B (en) | Method for blasting demolishing angle steel structure of precast concrete split module | |
| CN110530218B (en) | Method for demolishing angle steel without punching blasting | |
| CN108731567B (en) | Method for blasting demolishing angle steel structure of precast concrete integral module | |
| CN115307501A (en) | Blasting construction method for mountain earthwork | |
| CN208567659U (en) | A kind of precast concrete fission module of demolition blasting steel angle structure | |
| CN211651403U (en) | Static blasting device for large boulders in plateau area | |
| CN109489512B (en) | Portable quick medicine loading energy-collecting device of flexible folding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |