CN105423832B - Blast construction method of orientation window of thick-wall brick chimney - Google Patents
Blast construction method of orientation window of thick-wall brick chimney Download PDFInfo
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- CN105423832B CN105423832B CN201510873796.6A CN201510873796A CN105423832B CN 105423832 B CN105423832 B CN 105423832B CN 201510873796 A CN201510873796 A CN 201510873796A CN 105423832 B CN105423832 B CN 105423832B
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- chimney
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- directional window
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- 239000002360 explosive Substances 0.000 claims abstract description 25
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a blast construction method of an orientation window in the demolition blasting process of a brick chimney. The orientation window is in a right triangle ABC shape. Lofting marking is carried out through a total station. The orientation window comprises triangular-orientation-window vertexes A, B and C and sides AB, AC and BC of the triangle. Protective layers are reserved at the portions, close to the sides, in the triangle ABC, the portion, left after the protective layers are reserved, of the triangle ABC of the wall of the chimney is in a triangle A'B'C' shape, hole distributing and hole drilling are carried out in the triangle A'B'C' of the outer wall of the chimney through an air drilling machine, and drilled holes include the blast holes and the guide hollow holes; and explosive charging blasting is carried out on the blast holes, bricks blasted to be loose are removed through a portable machine, the protective layers are removed through an air pick or other machines, and the bottom face and the slope of the triangular orientation window ABC are ground through tools such as a light cutting machine. The blast construction method has the beneficial effects that labor intensity is small, the construction progress is rapid, the construction period is shortened, mechanical abrasion is small, labor cost is low, comprehensive construction cost is low, the orientation window is accurately constructed, and it is guaranteed that the reserved portion, except for the orientation window, of the wall of the chimney is complete in structure, free of overexcavation and insufficient excavation and the like.
Description
Technical field
The invention belongs to engineering explosion technical field, during more particularly to a kind of brick chimney demolition blasting, Directional Window is quick-fried
Broken construction method.
Background technology
With the high speed development of China's process of industrialization, many enterprises face resettlement or renewal of the equipment is regenerated, while in order to
The reduction of discharging of response national energy-saving and the policy of environmental protection, many brick fields need to close, and many chemical plant need technological transformation.These
In work, the dismounting problem of substantial amounts of brick chimney will be faced.In the method for dismounting of brick chimney, demolition blasting be it is a kind of fast and safely
Construction method.
The technology of Brick Chimney Demolition by Blasting and reinforced concrete chimney demolition blasting is distinguished：
(1) reinforced concrete chimney is higher than the intensity of brick chimney, structural stability is more preferable.
(2) reinforced concrete chimney supporting part intensity is high, and overall structure is stable, easily reaches orientation in demolition blasting construction
Collapse purpose, the centrage that collapses deviates smaller.
(3) brick chimney supporting part low intensity, the more inclined fragility of material, material are uneven, and structural strength is low, structural stability
Difference.It is more frequent using security incident when manually or mechanically removing；During using demolition blasting, Jing is often due to designing and constructing method not
Rationally, collapse direction substantial deviation is caused, has been led to many tragedies and has been occurred.
As in many cases, brick chimney demolition blasting environment is more complicated, during Brick Chimney Demolition by Blasting, need
Ensure the accurate orientation of brick chimney toppling direction, otherwise consequence is hardly imaginable.Directional Window is to ensure the accurate directioning falling of brick chimney
One of key problem in technology, therefore, the explosion design and construction method of Directional Window is undoubtedly one in Brick Chimney Demolition by Blasting the most
Important technology.
It is in the demolition blasting construction of brick chimney, in the method for tradition cutting Directional Window to adopt rock drill, quartering hammer, wind more
, there is following defect in the method such as pick or artificial cutting：
1st, using methods such as rock drill, quartering hammer, pneumatic pick or artificial cuttings, high labor intensive, work efficiency are low, and Jing often occurs two
Individual Directional Window is asymmetric, backbreak or owe situations such as digging.
2nd, the structural strength of second-hand brick chimney is relatively low, is oriented window cutting using quartering hammer or other main equipments
When, vibrations are big, there is certain impact to the stability of chimney.
3rd, the brick chimney larger for wall thickness, i.e. wall thickness in more than 0.8m, or even during more than wall thickness 1.3m, using rock drilling
The methods such as machine, quartering hammer, pneumatic pick or artificial cutting, are the efficient and accurate constructions of Directional Window difficult to realize.
Above technological deficiency will cause following safety problem：
1st, the position of Directional Window wedge angle and angle be exactly brick chimney demolition blasting toppling direction control key point, Directional Window
Laterally offset or the error of Directional Window angle are in brick chimney explosion toppling process, very big to chimney top bias effect.Than
Such as, do not consider the impact of the environmental factorss such as wind-force size, wind direction and other technical factors, the brick chimney high for 50～80m, one
1 ° of individual Directional Window horizontal-shift, will cause about 0.87～more than 1.40m is offset at the top of brick chimney, and chimney topples over landing coverage
21.82m will be expanded2～55.86m2More than.The height error of chimney Directional Window, topples over the impact of landing scope more to chimney
Greatly.
2nd, the smooth and integrity of Directional Window member-retaining portion directly affect the symmetric case of cut closure when chimney is toppled over from
And the direction that impact chimney is toppled over.
3rd, the moment that blasting cut is formed, Directional Window position will undertake the pressure and shearing of chimney upper component, therefore left and right
The bearing capacity of both sides must be identical, otherwise occurs very greatly partially as the difference of enabling capabilities also leads to chimney toppling direction
Move, even result in the out of control of toppling direction.
The content of the invention
It is an object of the invention to provide a kind of blasting construction method of heavy wall brick chimney Directional Window, to solve in the past thick
There is high labor intensity, low work efficiency, low construction essence in the Directional Window design and construction method of nogging chimney demolition blasting engineering construction
The technical problems such as degree, poor stability.
The purpose of the present invention is to be achieved through the following technical solutions：
A kind of blasting construction method of heavy wall brick chimney Directional Window, the Directional Window of cutting are right angled triangle ABC according to calmly
Requirement in demolition blasting design to blasting cut measures setting-out, will be the specification of Directional Window and position accurate
On chimney outer wall, setting-out mark is carried out using total powerstation for setting-out；Mark is started by total powerstation self orientation window drift angle A, including
Directional Window summit A, B, C and three sides of a triangle AB, AC, BC；Near the reserved protective layer of each edge, triangle in triangle ABC
The later remaining chimney wall of the reserved protective layer of shape ABC is triangle shooting region A ' B ' C '；It is characterized in that, using air drill machine in cigarette
Cloth hole, drilling on the AB and AC of chimney outer wall, carry out cloth hole, drilling in the triangle shooting region A ' B ' C ' scopes of chimney outer wall；
Drilling includes blast hole (blasthole), is oriented to emptying aperture, loads explosive to blast hole and detonator implements controlled blasting, using guiding emptying aperture
Guiding, bright finish effect, not powder charge hole stress concentration, increase the scope of freedom and reserved retaining layer, Directional Window ABC's is final to protect
Structural plane is injury-free；Using the fragment of brick of the quick-fried pine of light mechanical removal, protective layer is rejected, to the bottom surface of triangle Directional Window and tiltedly
Face is polished respectively to AB and AC setting-outs position；The otch bottom surface that horizontal sides AB of the Directional Window are designed with brick chimney explosion is same
In one level, vertical edges BC of Directional Window with chimney centrage on same vertical, AC on the frame inclined-plane of Directional Window, and
Brick chimney explosion design requirement is pressed for 25～30 ° with Directional Window bottom surface angle in the inclined-plane；It is arranged symmetrically along chimney toppling direction
Two equal right angled triangle Directional Windows, the base length of each Directional Window is 0.8m～1.5d, and d is chimney wall thickness, single
Position：m.
Guiding emptying aperture is provided that on the hypotenuse AC and base AB of right angled triangle ABC, vertical edges BC do not set blast hole
With guiding emptying aperture；It is that interval setting blast hole and guiding are empty on the hypotenuse A ' C ' and base A ' B ' of right angled triangle A ' B ' C '
Hole, vertical edges B ' C ' are above provided that blast hole；In right angled triangle A ' B ' C ' regions, setting is sequentially arranged at intervals by longitudinal direction
There is blast hole, be oriented to emptying aperture, blast hole and guiding emptying aperture are staggered in the horizontal.
During total powerstation setting-out labelling, all coordinates adopt earth coordinates, put ten for the thick multi-color cords of no more than 1.5mm
Word intersection point is simultaneously indicated outside 4cm, and Directional Window boundary line is the thick multi-color cord marks of no more than 4mm.
3～4 times for explosion bore dia of protective layer thickness.
During with total powerstation setting-out labelling, A ' B ' are parallel with AB, and B ' C ' are parallel with BC, and A ' C ' are parallel with AC, A ' B ' and AB, B '
C ' is equal to protective layer thickness with the distance of AC with BC, A ' C '.
The border and inside of the A ' B ' C ' using air drill machine on chimney wall carry out cloth hole, drilling, drilling include blast hole,
Emptying aperture is oriented to, boring aperture is not more than0.6～0.7 times for chimney wall thickness of explosion hole depth, boring direction is for radially
Horizontal direction.
The drilling hole of the cloth hole on border A ' B ', A ' C ' and B ' C ' of A ' B ' C ' periphery holes, i.e. A ' B ' C ' is away from being A ' B ' C '
Drilling hole in region away from 1/2～2/3.
On the side A ' B ' and A ' C ' of triangle shooting region A ' B ' C ', between adjacent two blast hole in the on line of center
Portion arranges and is oriented to emptying aperture；For the center distance being oriented between emptying aperture and blast hole, determine by a diameter of parameter of blast hole,
Take 4～5 times of explosion bore dia.
Guiding emptying aperture on the hypotenuse AC and base AB of right angled triangle ABC, its depth will drill through wall body, i.e. hole depth and be equal to
Chimney wall thickness；2～3 times for aperture of pitch-row, boring direction are radial level direction.
Blast hole detonation to A ' C ' and A ' B ' sidelines of right angled triangle A ' B ' C ', should slightly be ahead of middle part blast hole
Detonation.
The loading explosive charge calculation procedure of each blast hole：1. by quick-fried in chimney directional blasting design scheme
Examination is carried out in the middle part of broken otch quick-fried, determine the explosion unit consumption q (kg/m of chimney wall3)；2. the burst region A ' B ' C ' of Directional Window are calculated
Explosive payload Q of the single blast hole at middle partSingle hole(kg/ holes), QSingle hole=qV, V are the survey of the chimney wall of single blast hole design explosion
Measure amount side；3. the periphery hole of the burst region A ' B ' C ' of Directional Window loads detonator and explosive, the single hole of its blast hole using every hole
Powder charge measures the 1/2～3/5 of the single hole explosive payload that 2. step is calculated.
Not powder charge hole Design Treatment mode in the A ' B ' C ' of triangle shooting region has two kinds：1. the depth in not powder charge hole with
Explosion hole depth is consistent, 0.6～0.7 times for chimney wall thickness of hole depth；2. not powder charge hole is punched chimney wall, i.e. drilling depth and is equal to
Chimney wall thickness.
Blast hole adopts electric cap or Nonel detonator, using pulsed initiator or excites rifle to detonate.
Advantages of the present invention：Using controlled blasting method, acted on using leading holes and bright finish, be rapidly completed brick chimney fixed
To the construction of window, compared with mechanical artificial construction method, not only with labor intensity is little, construction speed fast, shorten the construction period,
Mechanical wear is little, labour cost is low, construction integrated cost is low, and Directional Window construction is accurate, it is ensured that the chimney wall beyond Directional Window
Member-retaining portion structural integrity, nothing are backbreak, dig phenomenon without deficient, while the mechanics of brick chimney is strong before ensure that brick chimney demolition blasting
Degree and stability, working security are high.
Description of the drawings
Fig. 1 is the Directional Window and burst region setting-out guidance diagram of the present invention.
Fig. 2 is the Directional Window explosion protective layer thickness schematic diagram of the present invention.
Fig. 3 is drilling (including being oriented to emptying aperture and blast hole) the arrangement schematic diagram of the present invention.
Fig. 4 is one of blast hole charge constitution schematic diagram of the present invention.
Fig. 5 is the two of the blast hole charge constitution schematic diagram of the present invention.
Fig. 6 is the electric initiating networking connection diagram of the present invention.
Fig. 7 is the NONEL demolition network connection diagram of the present invention.
Accompanying drawing number：δ is protective layer thickness, and A is significant points, and 1 is explosive, and 2 is electric cap, and 3 is chimney outer wall, and 4 are
Detonator wire, 5 is blocking section, and 6 is blasthole, 7 Nonel detonators, 8, excite rifle, 9 is pulsed initiator.
Specific embodiment
A kind of explosion design and construction method of heavy wall brick chimney Directional Window, the Directional Window of cutting is right angled triangle ABC, its
Comprise the following steps that.
1. setting-out is measured according to the requirement in blasting design scheme to blasting cut, by the specification of Directional Window and
On brick chimney outer wall, setting-out mark is carried out using total powerstation, is started by total powerstation self orientation window drift angle for position precision setting-out
Pointwise is marked, and including three summits and boundary line of mark Directional Window, marks three summits of triangle shooting region A ' B ' C '
And sideline.Triangle Directional Window ABC, triangle shooting region A ' B ' C ' and bursting work protective layer thickness δ institute as shown in Figure 1, Figure 2
Show.
2., during total powerstation setting-out labelling, all coordinates adopt earth coordinates, put as the thick multi-color cords of no more than 1.5mm
Cross intersection point is simultaneously indicated outside 4cm, the line thick multi-color cord marks of no more than 4mm.
3. brick chimney outer wall triangle shooting region A ' B ' C ' it is interior carry out cloth hole, it is slightly colored using no more than 1.5mm
The cross intersection point sign hole position center of line, is drilled with YT24 air drill machines, bit diameterHole depth is chimney wall thickness
0.60～0.70 times, the direction of drilling is the horizontal direction of radial direction；The pitch-row of interstitial hole takes 0.25～0.35m and is advisable, and array pitch takes
0.8～1.0 times of pitch-row；The pitch-row of periphery hole takes the 1/2～2/3 of interstitial hole and is advisable.Referring to Fig. 3.
4. continuous on the outer frame edges AC and AB of Directional Window to arrange emptying aperture, pitch-row is 2～3 times of aperture, and hole depth is penetrated
Chimney wall, i.e. hole depth are equal to chimney wall thickness, and boring direction is radial level direction.Referring to Fig. 3.
5. drilling is finished, and drilling cuttings in hole is cleaned out.
6. the pitch-row of pair drilling, depth and direction carry out an acceptance inspection.
7. try quick-fried.Examination is carried out in the middle of the blasting cut of design quick-fried, determined according to brick chimney structural strength and the quick-fried effect of examination
Explosion unit consumption.
8. the blasthole single hole explosive payload at triangle shooting region A ' B ' C ' middle parts is calculated according to the explosion unit consumption for trying quick-fried result.
Its calculation procedure：1. by quick-fried to examination is carried out in the middle part of the blasting cut in chimney directional blasting design scheme, determine chimney
The explosion unit consumption q (kg/m of wall3)；2. calculate explosive payload Q of the single blasthole at the burst region A ' B ' C ' middle parts of Directional WindowSingle hole
(kg/ holes), QSingle hole=qV, V are measurement side's amount of the chimney wall of single blast-hole design explosion；3. burst region A ' B ' of Directional Window
The periphery hole of C ' loads detonator and explosive using every hole, and the single hole powder charge of its blast hole measures the single hole dress calculated by " step is 2. "
The 1/2～3/5 of dose.Lateral opening single hole powder charge measures 0.5～0.6 times of middle part blasthole single hole explosive payload.
9. Security Checking.Vibration, the shock wave checked bursting work and produce is calculated according to the explosion total charge of Directional Window
Surrounding is built Deng harm, the impact of structures and facility.Using millisecond short delay blasting, single hop detonating charge amount is controlled.
10. the selection of explosive.Explosive, detonator are respectively adopted same factory's same model with series-produced product, quality and property
Relative national standards can be met.Explosive is selectedNo. two rock emulsion explosives of strip.Detonator can select millisecond electric detonator
Or Millisecond Nonel Tube Detonator.During using electric cap, blast hole loading structure is shown in Fig. 4；During using Nonel detonator, blast hole loading structure
See Fig. 5.
11. according to single hole explosive payload result of calculation, to the lateral opening of triangle shooting region A ' B ' C ', every hole load explosive and
Detonator；Blasthole to the middle part of A ' B ' C ', loads explosive and detonator；Closely knit is blocked with yellow mud to the aperture of blast hole.Blast hole
Arrange with reference to shown in Fig. 3 with emptying aperture.
12. pairs of triangle shooting regions are covered with bamboo sheathing, and are fixed on chimney wall with three circle crude iron lines.Bamboo sheathing covers anti-
Shield scope expands more than 50cm than burst region per side.
13. connection blasting circuits.During from electric cap, each blasthole loads 1 electric detonator, and detonator wire is using big series connection
Mode, is ignited with pulse initiator, referring to Fig. 6；During from Nonel detonator, each blasthole loads 1 Nonel detonator, adopts
Race joins mode, with exciting rifle to ignite, referring to Fig. 7.
14. Security alerts.According to blasting environment and blast working safety prevention measure, determine according to shotfiring safety code and warn
Guard against scope.Generally, Security alert scope radius 200m.
15. warnings are finished, and are detonated.
16. it is quick-fried after carry out safety inspection within 15 minutes.
17. confirm safety, release warning.
18. are cleared up to the fragment of brick of quick-fried pine with pneumatic pick.Due to setting protective layer and in triangle shooting region A ' B ' C '
Side A ' B ' and A ' C ' on appropriate location lay satisfactory emptying aperture, play the effectively effect such as " guiding " and " bright finish ",
So that demolition effect is good, while protecting orientation jamb unaffected.Due to the outer frame edges AC in triangle Directional Window
And continuous arrangement emptying aperture on AB, hole depth drills through wall body, when this measure causes the loaded hole of A ' C ' and A ' B ' to detonate, under blast action
The crack emptying aperture that extends respectively on AC and AB positions, certain effect of discongesting can be played to area's wall body thus, made artificial
And during wall body between mechanical treatment A ' C ' and AC and A ' B ' and AB it is more convenient, reduce labor intensity, improve work efficiency.
19. are repaired to triangle Directional Window ABC with pneumatic pick, are checked with total powerstation, are had and are owed digging, then use pneumatic pick
Finishing.Base AB, hypotenuse AC to Directional Window, particularly to orientation angle ∠ CAB, carried out repairing with instruments such as light cutting machines,
Polish, until meeting design requirement.
Cloth hole, the drilling on the AB and AC of chimney outer wall using air drill machine；In the triangle shooting region A ' of chimney outer wall
B ' C ' scopes carry out cloth hole, drilling, and drilling includes blast hole (blasthole), is oriented to emptying aperture, loads explosive and detonator reality to blast hole
Controlled blasting is applied, using leading holes and bright finish effect, not powder charge hole stress concentration and the increase scope of freedom and reserved retaining layer
The method for protecting the final structure face of Directional Window ABC injury-free.
The present invention is using photoelastic experiment and engineering practice effect parsing newest fruits：In triangle shooting region A ' B ' C '
Side A ' B ' and A ' C ' on, between adjacent two blasthole center on line middle part arrange emptying aperture when, when two blasthole of emptying aperture or so rise
After quick-fried, at middle emptying aperture, crackle is developed along the center on line direction of close blasthole.Should near the on line midpoint of blasthole center
The field of force will be enhanced, and the stress field in blasthole center on line both sides is contrary weakened, so as to limit crackle to both sides
Remote location extends.Therefore the emptying aperture of blasthole center on line midpoint forms stress concentration, so as to produce to blasthole Directional Extension
Crackle.The extension of this crackle shortens plane of disruption cutting through time between blasthole, and makes crack first along blasthole center on line side
To running through, while and inhibiting the extension of other direction crackles.Therefore the emptying aperture of reasonable distance is added near blast hole, is can use
Obtain effect well.For the center distance between emptying aperture and blast hole, know from the analysis and summary of practice effect, preferably by quick-fried
A diameter of parameter of holes typically takes 4～5 times of explosion bore dia determining.Described triangle shooting region A ' B ' C's '
The emptying aperture that side A ' B ' and A ' C ' above lay, plays " guiding " and " bright finish " etc. and effectively acts on.
Directional Window continuous arrangement emptying aperture on the outer frame edges of AC and AB, this measure is in view of the loaded hole detonation of A ' C ' and A ' B '
When, the crack under blast action can also extend respectively to the emptying aperture on AC and AB positions, thus to area's wall body (i.e. protective layer)
Certain effect of discongesting can be played, will the side of comparison when will make artificial and wall body between mechanical treatment A ' C ' and AC and A ' B ' and AB
Just, reduce labor intensity, improve work efficiency.
A kind of blasting construction method of described heavy wall brick chimney Directional Window, the orientation of the right angled triangle Directional Window of cutting
The optimum valuing range of angle ∠ CAB is 25～30 °, three face flat smooths of triangle Directional Window, free from flaw.
A kind of blasting construction method of described heavy wall brick chimney Directional Window, chimney wall thickness is larger, brick structure intensity compared with
Gao Shi, by must be in the enough emptying apertures of the intermediate arrangement of triangle shooting region A ' B ' C ', for for triangle shooting region
A ' B ' C ' increase the explosion scope of freedom, effectively improve the demolition effect in triangle A ' B ' C ' regions.
The explosion design and construction method of described a kind of heavy wall brick chimney Directional Window, during using electric cap, using big series connection
Blasting circuit, is detonated with pulsed electric initiator；During using Nonel detonator, blasting circuit is joined using race, is detonated with rifle is excited.
In Fig. 3,4,6,7, open circle represents emptying aperture, and solid rim represents blast hole；Dotted line scope A, represents the top of Directional Window
Angular zone, is the key position of the oriented control for ensureing chimney toppling direction, is the most important thing of this key technology, it is necessary to assure
Construction precision, it is ensured that the angle of drift angle is accurately and drift angle both sides are not damaged.
In Fig. 4, represent using charge constitution during electric detonator initiation mode, using No. two rock emulsion explosives of strip.
In Fig. 5, represent using charge constitution during Nonel detonator detonation mode, it is fried using No. two rock emulsifyings of strip
Medicine.
In Fig. 6, detonated using msdelayed light emission, by actual safety need using two or more section other millisecond electric thunder
Pipe.
In Fig. 7, mode is joined using race.Nonel detonator relay is sent out using wink outside hole, Millisecond Nonel Tube Detonator in hole, is adopted.
Each blast hole loads a Millisecond Nonel Tube Detonator, sends out relay detonator of the Nonel detonator for propagation of explosion outside hole wink.By actual peace
Need entirely to realize postponing detonation using two or more section of other Millisecond Nonel Tube Detonator.
Claims (12)
1. a kind of blasting construction method of heavy wall brick chimney Directional Window, the Directional Window of cutting is right angled triangle ABC；According to orientation
Requirement in demolition blasting design to blasting cut measures setting-out, and the specification of Directional Window and position precision are put
On chimney outer wall, setting-out mark is carried out sample using total powerstation；Mark is started by total powerstation self orientation window drift angle A, including fixed
To window summit A, B, C and three sides of a triangle AB, AC, BC；Near the reserved protective layer of each edge, triangle in triangle ABC
The later remaining chimney wall of the reserved protective layers of ABC is triangle shooting region A ' B ' C '；It is characterized in that, using air drill machine in chimney
Cloth hole, drilling on the AB and AC of outer wall, carry out cloth hole, drilling in the triangle shooting region A ' B ' C ' scopes of chimney outer wall；Bore
Hole includes blast hole, is oriented to emptying aperture, loads explosive to blast hole and detonator implements controlled blasting, made using leading holes, bright finish
With, not powder charge hole stress concentration, increase the scope of freedom and reserved retaining layer, do not received with the final structure face for protecting Directional Window ABC
Damage；Using the fragment of brick of the quick-fried pine of light mechanical removal, protective layer is rejected, the bottom surface and inclined-plane of triangle Directional Window are polished respectively
To AB and AC setting-outs position；The otch bottom surface of horizontal sides AB of the Directional Window and brick chimney explosion design in same level,
Vertical edges BC of Directional Window with chimney centrage on same vertical, AC on the frame inclined-plane of Directional Window, and the inclined-plane with
Directional Window bottom surface angle presses brick chimney explosion design requirement for 25 °～30 °；Equal two are arranged symmetrically along chimney toppling direction
Individual right angled triangle Directional Window, the base length of each Directional Window is 0.8m～1.5d, and d is chimney wall thickness, unit：m；Straight
Guiding emptying aperture is provided that on the hypotenuse AC and base AB of angle triangle ABC, vertical edges BC do not set blast hole and are oriented to emptying aperture；
Hypotenuse A ' the C ' and base A ' B ' of right angled triangle A ' B ' C ' is above interval setting blast hole and is oriented to emptying aperture, on vertical edges B ' C '
It is provided that blast hole；In right angled triangle A ' B ' C ' regions, it is sequentially arranged at intervals by longitudinal direction and is provided with blast hole, is oriented to sky
Hole, blast hole and guiding emptying aperture are staggered in the horizontal.
2. a kind of blasting construction method of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, total powerstation setting-out
During labelling, all coordinates adopt earth coordinates, put the cross intersection point for the thick multi-color cords of no more than 1.5mm and do outside 4cm
Sign, Directional Window boundary line are the thick multi-color cord marks of no more than 4mm.
3. a kind of blasting construction method of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, protective layer thickness
For 3～4 times of explosion bore dia.
4. a kind of blasting construction method of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, put with total powerstation
During sample labelling, A ' B ' are parallel with AB, and B ' C ' are parallel with BC, and A ' C ' are parallel with AC, and A ' B ' are with AB, B ' C ' with BC, A ' C ' with AC's
Distance is equal to protective layer thickness.
5. a kind of blasting construction method of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, using air drill machine
The border and inside of the A ' B ' C ' on chimney wall carries out cloth hole, drilling, and drilling includes blast hole, is oriented to emptying aperture, boring aperture
No more than0.6～0.7 times for chimney wall thickness of explosion hole depth, boring direction are radial level direction.
6. a kind of blasting construction method of heavy wall brick chimney Directional Window as claimed in claim 1 or 2, is characterized in that, A ' B ' C '
The drilling hole of the cloth hole on border A ' B ', A ' C ' and B ' C ' of periphery hole, i.e. A ' B ' C ' is away from being drilling hole in A ' B ' C ' regions
Away from 1/2～2/3.
7. a kind of blasting construction method of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, quick-fried in triangle
On the side A ' B ' and A ' C ' of broken region A ' B ' C ', between adjacent two blast hole, the middle part of center on line arranges and is oriented to emptying aperture；It is right
In the center distance being oriented between emptying aperture and blast hole, determine by a diameter of parameter of blast hole, take explosion bore dia 4～
5 times.
8. a kind of blasting construction method of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, right angled triangle
Guiding emptying aperture on the hypotenuse AC and base AB of ABC, its depth will drill through wall body, i.e. hole depth equal to chimney wall thickness；Pitch-row is hole
2～3 times of footpath, boring direction are radial level direction.
9. a kind of blasting construction method of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, to right angle trigonometry
The blast hole detonation in A ' C ' and A ' B ' sidelines of shape A ' B ' C ', should slightly be ahead of the detonation of middle part blast hole.
10. a kind of blasting construction method of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, each explosion
The loading explosive charge calculation procedure in hole：1. by trying in the middle part of the blasting cut in chimney directional blasting design scheme
It is quick-fried, determine the explosion unit consumption q (kg/m of chimney wall3)；2. calculate the single blast hole at the burst region A ' B ' C ' middle parts of Directional Window
Explosive payload QSingle hole(kg/ holes), QSingle hole=qV, V are measurement side's amount of the chimney wall of single blast hole design explosion；3. Directional Window
The periphery hole of burst region A ' B ' C ' loads detonator and explosive using every hole, and the single hole powder charge in its powder charge hole measures step and 2. counted
The 1/2～3/5 of the single hole explosive payload of calculation.
A kind of 11. blasting construction methods of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, triangle is quick-fried
Not powder charge hole Design Treatment mode in broken region A ' B ' C ' has two kinds：1. the depth in not powder charge hole is consistent with powder charge hole depth,
0.6～0.7 times for chimney wall thickness of hole depth；2. chimney wall, i.e. drilling depth are punched equal to chimney wall thickness in not powder charge hole.
A kind of 12. blasting construction methods of heavy wall brick chimney Directional Window as claimed in claim 1, is characterized in that, blast hole is adopted
With electric cap or Nonel detonator, using pulsed initiator or rifle is excited to detonate.
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| CN201510873796.6A CN105423832B (en) | 2015-12-02 | 2015-12-02 | Blast construction method of orientation window of thick-wall brick chimney |
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| CN107956199A (en) * | 2017-11-28 | 2018-04-24 | 北京旭日汇安工程技术有限公司 | The method for dismantling airfield runway |
| CN109579650A (en) * | 2019-01-28 | 2019-04-05 | 中交第二公路工程局有限公司 | A kind of static blasting method of no free boundary rock mass |
| CN112127697B (en) * | 2020-09-27 | 2022-02-11 | 广西建工集团冶金建设有限公司 | Dismantling method of reinforced concrete chimney |
| CN113279622B (en) * | 2021-05-21 | 2022-11-29 | 核工业南京建设集团有限公司 | Method for dismantling thin-wall reinforced concrete chimney through high-notch blasting |
| CN114322690A (en) * | 2022-01-07 | 2022-04-12 | 广东中人集团建设有限公司 | Shield underground bedrock boulder blasting method |
| CN114923384B (en) * | 2022-05-26 | 2023-03-17 | 江苏长江***工程有限公司 | Chimney directional blasting demolition method |
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| DD301300A7 (en) * | 1989-06-16 | 1992-11-19 | Verkehrsbau Union Gmbh | PROCESS FOR SEGMENTED LOCKING OF HIGH BUILDINGS |
| CN1261661C (en) * | 2004-01-12 | 2006-06-28 | 广东宏大***工程有限公司 | Reinforced concrete chimney folding blasting disassembling method |
| CN102679826A (en) * | 2012-03-27 | 2012-09-19 | 中钢集团武汉安全环保研究院有限公司 | Method for precisely excavating directional window on high and large concrete chimney |
| CN103292648B (en) * | 2013-06-04 | 2015-06-10 | 山西汾西矿业（集团）有限责任公司 | Blasting cartridge type directional blasting process for chimneys of brick-concrete structures |
| CN103822555B (en) * | 2014-02-28 | 2015-09-16 | 安徽水安建设集团股份有限公司 | Blasting method in a kind of hydraulic engineering strengthening reconstruction construction |
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