CN103175452A - Symmetrically swinging blasting method - Google Patents
Symmetrically swinging blasting method Download PDFInfo
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- CN103175452A CN103175452A CN2013100964110A CN201310096411A CN103175452A CN 103175452 A CN103175452 A CN 103175452A CN 2013100964110 A CN2013100964110 A CN 2013100964110A CN 201310096411 A CN201310096411 A CN 201310096411A CN 103175452 A CN103175452 A CN 103175452A
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- cooling tower
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- blasting
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- disintegration
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Abstract
The invention discloses a symmetrically swinging blasting method which includes the following steps: (1) dismantling all constructions inside a cooling tower; (2) forming load reducing windows in a ring beam of the cooling tower and a cylinder body at the upper portion of the cooling tower, forming disintegrating windows above the load reducing windows; (3) distributing blasted holes in the position, without the load reducing windows, of conversed Y-shaped ground jacks and the ring beam, installing nonel detonators and explosive in the blasted holes; and (4) successively igniting and detonating two blasted positions which are symmetrical about the center of a circle of the bottom portion of the cooling tower at a 0.5 second time interval. The symmetrically swinging blasting method has the advantages of being capable of preventing surrounding facilities from being damaged, good in disintegrating effect of the cooling tower, capable of reducing dismantling cost, and capable of being applied to demolition blasting of the cooling tower under various complex conditions, saving engineering investment and speeding engineering schedule.
Description
Technical field
The invention belongs to the blasting technique field, the symmetry that is specifically related to a kind of cooling tower swings blasting method.
Background technology
Cooling tower is a hyperbola Space Rotating body armored concrete shell structure body.Base diameter is large, and upper diameter is little, and the top bore is greater than middle bore, and depth-width ratio is little.The bottom is supported by tens pairs of herringbone supporting legs, and bottom collar tie beam thickness is 0.4m-0.5m, and cylindrical shell thickness is by the 0.4m-0.5m of bottom, to the 0.14m-0.2m of upper oral part, layer cloth muscle.The method of cooling tower dismounting at present adopts the method for directional blasting more, and the cooling tower under the explosion of the method bag is directly pounded to the surrounding facility, and the slungshot that causes and high pressure draught cause damage to the surrounding facility; Because cooling tower is xoncrete structure, if the disintegration effect of cooling tower is bad, also need a large amount of post-processed work, increase the workload of removing cooling tower, remove cost thereby increase.
Summary of the invention
The technical problem to be solved in the present invention is that cooling tower disintegration effect is bad, and the post-processed workload is large, cost is high, and damages the surrounding facility.
For solving the problems of the technologies described above, the invention provides a kind of symmetrical blasting method that swings, the method comprises the following steps:
(1) with the building complete removal of cooling tower inside;
(2) on cooling tower collar tie beam and top cylindrical shell thereof, the off-loading window is set, on off-loading window top, the disintegration window is set;
(3) laying the big gun hole on herringbone supporting leg and on the collar tie beam between the off-loading window, and in this big gun hole, Nonel detonator and explosive are being installed;
(4) at the emplacement priority ignition and detonation of 2 about the center of circle, cooling tower bottom symmetry.
Described in step (4) successively ignition and detonation be about the emplacement of 2 of the center of circle, cooling tower bottom symmetry with time interval of 0.5 second successively ignition and detonation.
The top of disintegration window described in step (2) is the 20%-25% of cooling tower height far from the height on ground.
Described in step (2), the width of off-loading window is 1.5-2 rice, and spacing is 9-10 rice.
Described in step (2), the width of disintegration window is 1.5-2 rice, and spacing is 9-10 rice.
be 201010513832.5 technical schemes that provide with respect to application number, in the technical scheme that this invention provides because two symmetrical fire points successively detonated with the time interval that differed for 0.5 second, form two moment seam brokens by the explosion unit that designs and time delay interval to two rightabout propagation of explosions along the tower body bottom like this, the local symmetry that produces in tower body top swings, complete explosion until meet at certain two Dian Chu emplacement, because the fire point time separately is shorter, cooling tower is collapsed towards a direction, and swing by a small margin can make cooling tower better disintegrate, thereby reduce the work for the treatment of in later stage.
The alleged symmetry of the present invention swings blasting procedure and refers in cooling tower is implemented blasting process, before not completing explosion, can make whole cooling tower relatively be in all the time the blasting method of of short duration symmetrical swing state, this blasting method is mainly used in cooling tower Blasting Collapse Demolition Construction.
Technical scheme provided by the invention has following technique effect:
(1) can effectively avoid directly smashing the facility on the cooling tower toppling direction and the slungshot that causes and high pressure draught to the damage of surrounding facility when Directional Blasting of Cooling Tower is toppled over, and it is effective that cooling tower is disintegrated, reduce and remove cost.
(2) can be applicable to the cooling tower demolition blasting of various complex conditions, and can save construction investment, speed up the work.
Description of drawings
Fig. 1 is the external structure schematic diagram of cooling tower;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is cooling tower Blasting Collapse otch schematic diagram;
Fig. 4 be sudden and violent mouthful of cooling tower Blasting Collapse propagation of explosion direction and moment cloth hole scope schematic diagram.
The specific embodiment
Embodiment 1:
The invention provides a kind of symmetrical blasting method that swings, the method comprises the following steps:
(1) with the building complete removal of cooling tower inside;
(2) on cooling tower collar tie beam 6 and top cylindrical shell thereof, off-loading window 2 is set, on off-loading window 2 tops, disintegration window 1 is set;
(3) lay big gun hole 5 on the collar tie beam 6 on herringbone supporting leg 4 and between off-loading window 2, and in this big gun hole 5, Nonel detonator and explosive are installed;
(4) at the emplacement priority ignition and detonation of 2 about the center of circle, cooling tower bottom symmetry.
Embodiment 2:
The invention provides a kind of symmetrical blasting method that swings, the method comprises the following steps:
(1) with the building complete removal of cooling tower inside;
(2) on cooling tower collar tie beam 6 and top cylindrical shell thereof, off-loading window 2 is set, on off-loading window 2 tops, disintegration window 1 is set;
(3) lay big gun hole 5 on the collar tie beam 6 on herringbone supporting leg 4 and between off-loading window 2, and in this big gun hole 5, Nonel detonator and explosive are installed;
(4) about the emplacement of 2 of the center of circle, cooling tower bottom symmetry with time interval of 0.5 second successively ignition and detonation.
The top of disintegration window 1 described in step (2) is the 20%-25% of cooling tower height far from the height on ground.
Described in step (2), the width of off-loading window 2 is 1.5-2 rice, and spacing is 9-10 rice.
Described in step (2), the width of disintegration window 1 is 1.5-2 rice, and spacing is 9-10 rice.
Embodiment 3:
Symmetry for removing cooling tower provided by the invention swings blasting method, and the method comprises the following steps:
(1) with the building complete removal of cooling tower inside;
(2) on cooling tower collar tie beam 6 and top cylindrical shell thereof, off-loading window 2 is set, on off-loading window 2 tops, disintegration window 1 is set; Wherein the disintegrate top of window 1 is 20% of cooling tower height far from the height on ground; Wherein the width of off-loading window 2 is 1.5 meters, and spacing is 9 meters; The width of window of wherein disintegrating is 1.5 meters, and spacing is 9 meters.After forms set, expose reinforcing bar 3;
(3) lay big gun hole 5 on the collar tie beam 6 on herringbone supporting leg 4 and between off-loading window 2, and in this big gun hole 5, Nonel detonator and explosive are installed;
(4) about the emplacement of 2 of the center of circle, cooling tower bottom symmetry with time interval of differing for 0.5 second successively ignition and detonation.
Embodiment 4:
Symmetry for removing cooling tower provided by the invention swings blasting method, and the method comprises the following steps:
(1) with the building complete removal of cooling tower inside;
(2) on cooling tower collar tie beam 6 and top cylindrical shell thereof, off-loading window 2 is set, on off-loading window 2 tops, disintegration window 1 is set; Wherein the disintegrate top of window 1 is 25% of cooling tower height far from the height on ground; Wherein the width of off-loading window 2 is 2 meters, and spacing is 10 meters; The width of window 1 of wherein disintegrating is 2 meters, and spacing is 10 meters.After forms set, expose reinforcing bar 3
(3) lay big gun hole 5 on the collar tie beam 6 on herringbone supporting leg 4 and between off-loading window 2, and in this big gun hole 5, Nonel detonator and explosive are installed;
(4) about the emplacement of 2 of the center of circle, cooling tower bottom symmetry with time interval of differing for 0.5 second successively ignition and detonation.
Embodiment 5:
(1) symmetry for removing cooling tower provided by the invention swings blasting method, and the method comprises the following steps: with the building complete removal of cooling tower inside;
(2) on cooling tower collar tie beam 6 and top cylindrical shell thereof, off-loading window 2 is set, on off-loading window 2 tops, disintegration window 1 is set; Wherein the disintegrate top of window 1 is 22% of cooling tower height far from the height on ground; Wherein the width of off-loading window 2 is 1.8 meters, and spacing is 9.5 meters; The width of window 1 of wherein disintegrating is 1.8 meters, and spacing is 9.5 meters.After forms set, expose reinforcing bar 3.
(3) lay big gun hole 5 on the collar tie beam 6 on herringbone supporting leg 4 and between off-loading window 2, and in this big gun hole 5, Nonel detonator and explosive are installed;
(4) about the emplacement of 2 of the center of circle, cooling tower bottom symmetry with time interval of differing for 0.5 second successively ignition and detonation.
Now remove as example cooling tower is implemented the symmetrical Blasting Collapse that swings, the symmetrical blasting procedure principle that swings of cooling tower is described in detail in detail, cooling tower is the mixed soil structured body of a hyperbola Space Rotating body shell reinforcing bar, and the three-dimensional coordinate system of setting up for cooling tower as shown in Figure 1.In this coordinate system, Z axis is the solid geometry symmetry axis of cooling tower, and X-axis and Y-axis are the vertical axis of symmetry of tower body on ground level.In the symmetrical swing of application cooling tower blasting procedure is implemented the Blasting Collapse process to cooling tower, at first be symmetrical in the emplacement at any two points place (as A, B 2 points) of the origin of coordinates 0 with time interval of differing for 0.5 second successively ignition and detonation on cooling tower, begin to two rightabout propagation of explosions from each fire point along the tower body bottom by the time-delay bench that designs, moment successively forms respectively two big or small unequal moment seam brokens 7 that are symmetrical in Z axis.Simultaneously, the top tower body of two unequal moment seam broken 7 correspondences of size, will be unsettled because of the support that has lost the bottom, the volume that these two parts are symmetrical in the unsettled tower body of Z axis should not equate, and pointed to the active force P in the earth's core by the both direction that its deadweight produces
1And P
2Should not equate yet.Suppose that it is P that the active force in the earth's core is pointed in deadweight that large moment seam broken causes
2,The active force that the earth's core is pointed in the deadweight that little moment seam broken causes is P
1, so, power P
1Should be less than power P
2And all be parallel to Z axis.At this moment, because tower body other position still keeps original poised state constant, power P again
1And P
2Act on respectively tower body both sides, therefore, top tower body corresponding to unequal two seam brokens of size should relatively be in the uneven stress of moment, as shown in Figure 4.
At this moment, the unsettled tower body of two parts is at power P
1With power P
2The priority alternating action under can be respectively produce the part crack that differs in size and sagging on a small quantity, this tower body top that will cause their correspondences successively alternately sinks---namely swing.Along with the constantly alternately expansion of moment seam broken of two symmetries, and one side moment seam broken must be greater than the moment seam broken of another side after expansion, and local generation the in guarantee tower body top continues the symmetry swing like this.The swing at tower body top helps the disintegration after whole tower body explosion is completed.Therefore, the moment before not completing explosion, power P
1With power P
2Size alternately changing, the local lasting symmetrical swing that produces in guarantee tower body top like this.Because the cooling tower base diameter is large, depth-width ratio is little, and center of gravity is low, and the tower body top is short hunting period in addition, so tower body can not collapse to side direction before explosion is completed.Moment after completing whole explosions, the top tower body is all unsettled, this part tower body at it under action of gravitation, can only be rapidly vertical slump, under the assistance of off-loading window (groove), disintegration window, the disintegration that fractures very soon of the following tower body of 25m height, subsequently, under the effect of top tower body decline inertia force, tower body top caves in very soon and is disintegrating on the quarrel heap below, the tower body depth-width ratio is little in addition, and therefore, the residue tower body can not collapse to any direction deflection.Here it is swings with the cooling tower symmetry overall process that blasting procedure carries out cooling tower Blasting Collapse construction tower body force analysis and disintegration.
Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; do not breaking away under general idea prerequisite of the present invention; can also make some changes and improvements, for example width and the spacing of disintegration window and off-loading window be changed, and to the Initiation time interval change within the specific limits; these also should be considered as protection scope of the present invention, and these can not affect effect of the invention process and practical applicability.
Claims (5)
1. a symmetrical swing blasting method, is characterized in that, the method comprises the following steps:
(1) with the building complete removal of cooling tower inside;
(2) on cooling tower collar tie beam and top cylindrical shell thereof, the off-loading window is set, on off-loading window top, the disintegration window is set;
(3) laying the big gun hole on herringbone supporting leg and on the collar tie beam between the off-loading window, and in this big gun hole, Nonel detonator and explosive are being installed;
(4) at the emplacement priority ignition and detonation of 2 about the center of circle, cooling tower bottom symmetry.
2. symmetrically according to claim 1 swing blasting method, it is characterized in that: described in step (4) successively ignition and detonation be about the emplacement of 2 of the center of circle, cooling tower bottom symmetry with time interval of 0.5 second successively ignition and detonation.
3. symmetrical swing blasting method according to claim 1, it is characterized in that: the top of disintegration window described in step (2) is the 20%-25% of cooling tower height far from the height on ground.
4. the according to claim 2 or 3 described symmetrical blasting methods that swing, it is characterized in that: described in step (2), the width of off-loading window is 1.5-2 rice, spacing is 9-10 rice.
5. the according to claim 2 or 3 described symmetrical blasting methods that swing, it is characterized in that: described in step (2), the width of disintegration window is 1.5-2 rice, spacing is 9-10 rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100964110A CN103175452A (en) | 2013-03-25 | 2013-03-25 | Symmetrically swinging blasting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100964110A CN103175452A (en) | 2013-03-25 | 2013-03-25 | Symmetrically swinging blasting method |
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| CN103175452A true CN103175452A (en) | 2013-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900429A (en) * | 2014-04-18 | 2014-07-02 | 武汉爆破有限公司 | Concrete hollow pillar blasting method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2399133A (en) * | 2003-03-06 | 2004-09-08 | John Turner | Demolition apparatus and method |
| CN1556294A (en) * | 2004-01-12 | 2004-12-22 | 广东宏大爆破工程有限公司 | Reinforced concrete chimney folding blasting disassembling method |
| CN102003921A (en) * | 2010-10-21 | 2011-04-06 | 姬云峰 | Balance blasting method |
-
2013
- 2013-03-25 CN CN2013100964110A patent/CN103175452A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2399133A (en) * | 2003-03-06 | 2004-09-08 | John Turner | Demolition apparatus and method |
| CN1556294A (en) * | 2004-01-12 | 2004-12-22 | 广东宏大爆破工程有限公司 | Reinforced concrete chimney folding blasting disassembling method |
| CN102003921A (en) * | 2010-10-21 | 2011-04-06 | 姬云峰 | Balance blasting method |
Non-Patent Citations (3)
| Title |
|---|
| 王希之等: "《遵义电厂冷却塔爆破拆除》", 《爆破》 * |
| 谢胜军 等: "《爆破技术在电厂冷却塔拆除工程中的应用》", 《工程爆破》 * |
| 陈颖锋 等: "《原地坍塌爆破过程中防偏斜技术的试验研究》", 《采矿技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900429A (en) * | 2014-04-18 | 2014-07-02 | 武汉爆破有限公司 | Concrete hollow pillar blasting method |
| CN103900429B (en) * | 2014-04-18 | 2016-01-06 | 武汉爆破有限公司 | A kind of blasting method of concrete hollow column |
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Application publication date: 20130626 |