CN1324212C - Linear energy connectracting cutting disassembling method of steel structured factory building - Google Patents
Linear energy connectracting cutting disassembling method of steel structured factory building Download PDFInfo
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- CN1324212C CN1324212C CNB2005100952015A CN200510095201A CN1324212C CN 1324212 C CN1324212 C CN 1324212C CN B2005100952015 A CNB2005100952015 A CN B2005100952015A CN 200510095201 A CN200510095201 A CN 200510095201A CN 1324212 C CN1324212 C CN 1324212C
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Abstract
The present invention discloses a linear energy-gathering cutting dismantlement method for a steel structural factory building, which comprises a blasting incision position determination method, an incision form determination method, a preprocessing method and detonation linear energy-gathering cutter installation, wherein the blasting incision position determination method comprises the blasting incision position determination of a row rack type steel structural factory building and a frame type steel structural factory building; cutters are installed in the blasting incision positions of components after the blasting incision position determination, the incision form determination and the preprocessing are finished; the combination of a detonation assembly and the cutters is finished to form a detonation network connecting cutters, and the detonation network is finally ignited to be detonated. The present invention has the following obvious advantages of high safety, reliability, simple and convenient enforcement, less material consumption, high efficiency and wide range of application.
Description
One, technical field
The present invention relates to a kind of line style cumulative cutting method, the line style cumulative cutting method that particularly a kind of steel-structure factory building is removed.
Two, background technology
A lot of industrial premises all belong to large-scale framed bent or frame type steel work.An important feature of this class factory building is, builds more convenient fast, and it is very high to remove the rate of recovery of back steel.Therefore along with progress of science and technology and industrial expansion, this class steel-structure factory building also will get more and more, and also having increasing this type of factory building simultaneously needs to remove.
Up to now, mechanical means is mainly adopted in domestic dismounting to this class steel-structure factory building, and methods such as the cutting of ARC CUTTING, oxy-acetylene flame or machinery is powerful sawed-off are mainly adopted in the cutting of factory building steel member.These method for dismounting exist that the equipment consumption is big, the engineering time is long, appropriation of labour power is many, inefficiency and shortcoming such as very easily cause casualties.
Three, summary of the invention
1, goal of the invention: the line style cumulative cutting method that the invention provides a kind of safe, reliable, efficient dismounting steel-structure factory building.
2, technical scheme: the present invention includes: definite method of cutting part, definite method, preprocess method and the installation of form of cut or cuts, linear cavity effect cutter detonates.
(1) cutting part determines.
Cutting part is meant that linear cavity effect cutter is provided with and forms otch by the cumulative cutting on the main member of steel work.
Determine that cutting part must take all factors into consideration that the overall structure characteristics of steel work and load characteristic, the design feature of main supporting part, expection collapse that mode, the reliability of collapsing, residual ruins piling height require, easy construction and clear principal element such as convenience.
Determining of column upper cut position and number thereof:
For framed bent formula steel-structure factory building, general optional 1 to 3 place of the cutting part on the column; The number of cutting part is then determined according to the order of collapsing of column.Collapsing at first, that arranges the column of (A row), otch number on every root post is generally 3, be called undercut, middle otch and top otch, lay respectively at column bottom (0.5m to 1m locates apart from ground), column in the junction of portion and column top and crossbeam on the lower side.Collapsing at last, that arranges the column of (C row), and the otch number on every root post is generally 1, promptly only establishes undercut.The otch number of other rows' column can be 2 or 3; If in the time of 2, then undercut must be arranged.
For the frame type steel-structure factory building, each column cutting part and number thereof then come to be determined according to number of floor levels, interlamellar spacing and the order of collapsing of respectively arranging column.For the A of bottom row column, when its height during more than or equal to 5 meters, the otch number on every root post is generally 2, and wherein 1 is positioned at apart from floor bottom surface 0.5m to 1m and locates, in addition 1 with its at a distance of being not less than 3 meters; When its height during, only there is undercut to get final product less than 5 meters; For n row (n＞1) column, then every root post need only be provided with a undercut and get final product.For every row's column of the 2nd floor, all 1 otch is set at distance floor face 0.5m to 1m place.For m floor (m＞2) building respectively arrange column, 1 cutting part all is set on the column of even number floor, its position is located apart from this floor face 0.5m to 1m.Being provided with according to top load and structure and deciding of top otch generally should be provided with the top otch.
Because the bottom and the central structure of framed bent or tower structure factory building bearing column are generally lattice, promptly combine by two i iron or channel-section steel (be called the front and back limb, collapse direction one side is a forelimb, and opposite side is a hind leg) usually.For guaranteeing that works reliably collapses, the undercut on the forelimb should be than about the low 0.5m of the undercut on the hind leg, and the middle otch on the forelimb then should be than about the high 0.5m of middle otch on the hind leg.
(2) form of cut or cuts determines
Form of cut or cuts is meant width, length and the direction of linear cavity effect cutter formed line style otch after column web (wing plate) is gone up blast.
Kerf width depends on the performance of cutter, is generally 2mm～10mm.
Incision length determines that by the width that is cut column web (wing plate) and cut-out direction even otch and horizontal direction angle are α, and the width of web (wing plate) is L, incision length B=L/cos α then, and B reduces and reduces with α's;
General α=20 °～45 °, all otch α of A row column all get 45 °, all the other α that respectively arrange the column otch then with this row and A array pitch from increase reduce, the α of C row column otch can be 0 °, if be not 0 °, then the normal direction of otch parallax should be towards the rightabout of works collapse direction; And the normal direction of all the other column otch parallaxs should be towards the collapse direction of works.
(3) preliminary treatment
Preliminary treatment is cutting in advance or the dismounting of before the cumulative cutting works partial component being implemented.Its objective is: guaranteeing under the prerequisite that steel-structure factory building collapses by certain requirement, reducing the cutter material use quantity as far as possible, reduce explosion hazard.Preconditioning technique mainly comprises:
Determining of preliminary treatment position.
The preliminary treatment position is determined by the design feature of taking all factors into consideration incision site, form of cut or cuts and column.The preliminary treatment position mainly is in the otch and the scope between the otch on the different limbs, also comprises the scope of closing on of single otch.Other are not influenced Stability Analysis of Structures but may influence the collapse supplementary structure of effect of blast should remove in advance yet.
Determining of preliminary treatment member.
Otch and the preliminary treatment member between the otch (abbreviating first kind preliminary treatment member as) on the different limbs mainly contain: transverse connection between limb and oblique connector.
The preliminary treatment member (abbreviating the second class preliminary treatment member as) that single otch closes in the scope mainly contains: all kinds of parts of sewing; Do not intend wing plate or web, promptly can precut wing plate and keep web or precut web reservation wing plate with the linear cavity effect cutter cutting.
Usually, to just not processing that first kind preliminary treatment member can not handled, and just handle the second class preliminary treatment member is treatable as far as possible; Preliminary treatment kerf width on the web (wing plate) is controlled at 100mm～150m; Need measure the column stress strain in the preprocessing process, and the strictness monitoring is carried out in the distortion of structure.
(4) linear cavity effect cutter of installing, detonate:
In the installation of member explosion cutting part cutter is set, and finishes the combination of detonate assembly and cutter; Constitute the blasting circuit that connects between each cutter;
Implement ignition and detonation at last.
3, beneficial effect: the present invention compared with prior art has following remarkable advantage: safe and reliable, be easy to implement, and few with material, the efficient height, applied widely.
Four, the specific embodiment
Embodiment 1: adopt this invention successfully to remove the Shanghai Baosteel first steel mill second steelshop structural iron framed bent factory building.The long 318m of this workshop main building thing, the wide 110m in north and south amounts to and takes up an area of 32200m
2, building area 69505m
2
Factory building (steel work ladder type roof truss) is the single-layer steel structure thing, long 318m, and span 19.7m, cornice absolute altitude are +24.6m, and roofing height in skylight is +29m, and roofing is large-scale precast concrete, and gable is a zinc-plated watt of space enclosing structure; Reinforced factory building and the shared 3 row's factory building columns of charging aisle factory building of striding, post is apart from 18m.
The explosion cutting part is determined.The explosion cutting parts of totally 3 row's columns for this steel framed bent factory building determine that otch number average front-seat and second row's column is 3, lay respectively at bottom the column, in portion and top on the lower side; Last row's column is established 1 otch.
Determining of form of cut or cuts.According to the cutting power of cutter, kerf width is taken as 4mm.The otch and the horizontal direction angle α of first, second row's column are taken as 45 °.The otch α of the 3rd row's column is 30 °; The normal direction of all column otch parallaxs is all towards the collapse direction of works.
Preliminary treatment.The preliminary treatment position is determined in the otch and the scope between the otch on the limb, also to have implemented preliminary treatment for the scope of closing on of the single otch in column top simultaneously before and after column; The preliminary treatment member is defined as transverse connection and the oblique connector between limb between otch on the different limbs and the otch, and the single otch in column top closes on all kinds of parts of sewing in the scope; To not intending wing plate or web, also precut wing plate according to circumstances and kept web or precut web reservation wing plate with the linear cavity effect cutter cutting.Preliminary treatment kerf width on the web (wing plate) is controlled at 100mm～150m; In good time measurement has been carried out in column stress strain in the preprocessing process, and strict monitoring has been carried out in the distortion of structure.
Implement explosion Cutting Demolition at last.After the explosion, factory building collapses fully; Raft higher primary school is in 4m; Roof truss and steel post disintegrate fully; Respectively pour out 12m, 20m to North and South direction; The initiation net reliable initiation is not found the quick-fried phenomenon of miss-firing of mistake, does not produce any loss, and explosion has reached the requirement of regulation.
Embodiment 2: adopt this invention successfully to remove steel work row, the frame-combined factory building of three steel-making of last marine steel one factory.The framed bent part North and South direction of this factory building is 2 to stride, 3 row columns, and the quantity of every row column is respectively 25,36 and 28; The east-west direction column be 38 stride, 39 row's columns, the column form is a lattice.The wide 39.9m in this steel structure north and south, the long 228m of thing, the high 25m of main body.The frame part North and South direction of this factory building is similarly 2 and strides, 3 row columns; Long 80 meters of frame part, main body is high 42 meters, totally 4 layers.
The explosion cutting parts of totally 3 row's columns for this steel-structure factory building framed bent part determine that otch number average front-seat and second row's column is 3, lay respectively at bottom the column, in portion and top on the lower side; Last row's column is established 1 otch.
The explosion cutting part is determined.For this steel-structure factory building frame part also is that the totally 3 explosion cutting parts of arranging columns are determined.A for bottom arranges column, because it is highly greater than 5 meters, the otch number on then every root post is taken as 2, and wherein 1 is positioned at apart from 0.5m place, floor bottom surface, 1 and its apart 3 meters in addition; For every row's column of the 2nd floor, all 1 otch is set at distance floor face 0.5m.For the 3rd floor respectively arrange column, 1 cutting part all is set on column, its position is apart from this floor face 0.5m place.Every row's column for the 4th floor all is provided with the top otch.
Determining of form of cut or cuts.For the framed bent and the frame part of this steel-structure factory building, the form of cut or cuts on its column does not have difference.According to the cutting power of cutter, kerf width is taken as 4mm.The otch and the horizontal direction angle α of first, second row's column in the framed bent of this steel-structure factory building and the frame part structure are taken as 45 °.The otch α of the 3rd row's column is 30 °; The normal direction of all column otch parallaxs is all towards the collapse direction of works.Preliminary treatment.For the framed bent and the frame part of this steel-structure factory building, definite unanimity basically at its preliminary treatment position.Promptly before and after column, in the otch and the scope between the otch on the limb, also implemented preliminary treatment for the scope of closing on of the single otch in column top simultaneously; The preliminary treatment member is defined as transverse connection and the oblique connector between limb between otch on the different limbs and the otch, and the single otch in column top closes on all kinds of parts of sewing in the scope; To not intending wing plate or web, also precut wing plate according to circumstances and kept web or precut web reservation wing plate with the linear cavity effect cutter cutting.Preliminary treatment kerf width on the web (wing plate) is controlled at 100mm～150m.In the preprocessing process and in the constructions demolition process of toppling over, the ess-strain of frame, framed bent part column has all been carried out in good time measurement, and strict monitoring has been carried out in the distortion of structure.
Implement explosion Cutting Demolition at last.After the explosion, factory building collapses fully; Raft higher primary school is in 7m; Roof truss and steel post disintegrate fully; Be 28m to the maximum to toppling over of north orientation, to toppling over of south orientation apart from being 17 meters to the maximum apart from reaching.Demolition effect satisfies the requirement of regulation fully.
Claims (3)
1, a kind of linear energy connectracting cutting disassembling method of steel structured factory building is characterized in that it comprises that the explosion cutting part determines that method, form of cut or cuts are determined method, preprocess method and installation, linear cavity effect cutter detonates;
(1) the explosion cutting part determines that method is:
For framed bent formula steel-structure factory building, the cutting part of column selects 1 to 3 place; The row's column that collapses at first, the otch number on its every root post is 3, lay respectively at column bottom, in portion and top on the lower side, the row's column that collapses is at last established 1 undercut, other row's columns are 2～3 otch;
To the frame type steel-structure factory building, when its bottom the 1st was arranged column height greater than 5 meters, every column was established 1 otch up and down; When column height during, only establish undercut less than 5 meters; To every root post of n row, establish 1 undercut; To every row's column of the 2nd floor, establish 1 otch; The m floor is respectively arranged column, on even number floor column, establish 1 cutting part; Wherein n, m are natural number, n＞1, m＞2;
(2) form of cut or cuts determines that method is:
Kerf width is 2mm～10mm, and incision length is B=L/cos α, and wherein L is the width of web or wing plate, and α is otch and horizontal direction angle;
(3) preprocess method is:
Remove the horizontal and oblique connector between different limbs, single otch and close on the part of sewing in the scope, and need to remove but do not intend wing plate or web with cutter cuts, the preliminary treatment kerf width on web or the wing plate is 100mm～150m;
(4) linear cavity effect cutter of installing, detonate:
In the installation of member explosion cutting part cutter is set, and finishes the combination of detonate assembly and cutter; Constitute the blasting circuit that connects between each cutter;
Implement ignition and detonation at last.
2, linear energy connectracting cutting disassembling method of steel structured factory building according to claim 1, it is characterized in that determining in the method at the explosion cutting part, when framed bent or tower structure factory building column are lattice, the forelimb undercut should be than the low 0.5m of hind leg undercut, and otch is than the high 0.5m of otch in the hind leg in the forelimb.
3, linear energy connectracting cutting disassembling method of steel structured factory building according to claim 1 is characterized in that determining in the method in form of cut or cuts, α=20 °～45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100952015A CN1324212C (en) | 2005-11-03 | 2005-11-03 | Linear energy connectracting cutting disassembling method of steel structured factory building |
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| CNB2005100952015A CN1324212C (en) | 2005-11-03 | 2005-11-03 | Linear energy connectracting cutting disassembling method of steel structured factory building |
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| CN1324212C true CN1324212C (en) | 2007-07-04 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942907B (en) * | 2010-08-23 | 2011-10-05 | 重庆城建控股(集团)有限责任公司 | Manual disassembling technology of high-skylight cross beam |
| 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 |
| 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 |
| CN108894534B (en) * | 2018-05-29 | 2020-11-13 | 五冶集团上海有限公司 | Sintering desulfurization plant modular dismantling method |
| 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 |
| CN109269367B (en) * | 2018-10-19 | 2020-06-05 | 洛阳理工学院 | Punching-free construction method for blasting demolition of reinforced concrete frame structure |
| CN115559560B (en) * | 2022-10-08 | 2023-07-07 | 江汉大学 | Method for dismantling profile steel concrete upright post |
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