CN1342882A - Explosion method for demolishing cofferdam - Google Patents
Explosion method for demolishing cofferdam Download PDFInfo
- Publication number
- CN1342882A CN1342882A CN 00124802 CN00124802A CN1342882A CN 1342882 A CN1342882 A CN 1342882A CN 00124802 CN00124802 CN 00124802 CN 00124802 A CN00124802 A CN 00124802A CN 1342882 A CN1342882 A CN 1342882A
- Authority
- CN
- China
- Prior art keywords
- cofferdam
- explosion
- otch
- weir
- demolishing
- 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.)
- Granted
Links
Images
Landscapes
- Working Measures On Existing Buildindgs (AREA)
Abstract
A technique for demolishing cofferdam by explosion is featured by that a broken line is made on the external side of said cofferdam by explosion. Under the action of gravity, the upper cofferdam above the broken line is toppled down outward. Its advantages are no or less musk to be removed, less consumption of explosive, low vibration, low cost and short period.
Description
The present invention relates to a kind of demolition blasting concrete cofferdam method, particularly adopt and topple over upset demolition blasting roller compacted concrete cofferdam blasting demolishing method.
The technology relevant with explosion method for demolishing is the blasting demolishing method of all kinds of rock soil demolition technology, large-sized concrete demolition blasting and building, and related data " is being introduced in engineering explosion handbook one book to some extent.Layering demolition blasting roller compacted concrete cofferdam can be consulted the paper " Yan Tan power station roller compacted concrete cofferdam demolition blasting " on " the engineering explosion collected works " the 5th volume that Li Shihong etc. is published in 1993.Adopting standing, broken large-sized concrete basis and layering blowing up concrete cofferdam all is some routines, mature technology, but all there are quick-fried back scarfing cinder, broken body lumpiness problem in these blasting methods, also have pore-forming expense height, explosive quantity long in time limit, each and total dose bigger in addition, explosion vibration is to problems such as the influence of adjacent buildings are also bigger.So when removing the large-sized concrete cofferdam, propose that a kind of speed of application is fast, the cofferdam is removed in onepull, produce that vibration is little, the simple method of technological operation is very necessary.
It is bigger to the objective of the invention is to overcome in the existing demolition blasting concrete cofferdam technology pore-forming expense height, explosive quantity long in time limit, each and total dose, explosion vibration is to problem such as the influence of adjacent buildings is also bigger, thereby provide a kind of saving explosive, it is little to produce vibration, the pore-forming sum is compared less with standing, thereby construction costs is low, once removes, duration is short, the new method that is used for the demolition blasting concrete cofferdam---the explosion method for demolishing that construction speed is fast.
The present invention proposes a kind of demolition blasting concrete cofferdam method---topple over the directional blasting demolishment of upset similar all kinds of buildings of demolition blasting method such as residential building, chimney.As shown in Figure 1, this topples over upset demolition blasting method is to leave an explosion otch in the outside, cofferdam of intending the dismounting position with blasting procedure, make weir, top body unstability, part is waited to remove to opening one inclination in the cofferdam under the gravity effect, fall into to the root in the outside, cofferdam, its specific embodiments is carried out according to the following steps:
1) beat upright opening or inclined hole from weir crest, the bottom, hole surpasses intends removing the position, is perhaps removing the pre-buried pore of position level;
2) intending removing position Strap cartridge bag;
3) explosive funnel action index n 〉=0.75 of cartridge bag;
4) leave an explosion otch by the blast action of cartridge bag;
5) will to satisfy the center of gravity of removing the cofferdam body be C among Fig. 1 to the explosion otch, and the summit that is moved to otch also is outside weir, the top body upset supporting-point B;
6) removing after the position leaves the explosion otch with explosive, weir, top body unstability begins to topple over, turn to the root in the outside, cofferdam under the gravity effect.The invention has the advantages that: require once to finish as the demolition blasting concrete cofferdam, existing layering is removed inadvisable; Adopt loosening crushing Blasting scheme, when once the cofferdam height degree of Chai Chuing reached tens meters, pore-forming expense and difficulty of construction increased; Behind the demolition blasting, form quick-fried stack height and reach several meters, submarine mechanical is removed quick-fried heap expense height, long in time limit; Each explosive quantity and total dose are bigger, and explosion vibration is also bigger to the influence of adjacent buildings; Block rolling amount downstream is difficult to control, and dismounting back block rolls downstream and the effect of current will produce bigger vibration at the key dam dam foundation.And topple over upset demolition blasting cofferdam is disposable demolition blasting concrete cofferdam, compares after quick-fried fewly without scarfing cinder or scarfing cinder amount basically with other method, saves explosive, it is little to produce vibration, and the pore-forming sum is compared less with standing, and construction costs is low, duration is short, and construction speed is fast.
The present invention is described in detail for the contrast drawings and Examples now
Fig. 1 is the demolition blasting method principle schematic of toppling over, overturn,
Corresponding upright opening or the inclined hole cloth medicine of 1a figure, 1b schemes the pre-buried pore cloth of corresponding level medicine.1 is the cofferdam among the figure, and 2 is blast with linear charges, and 3 remove for the explosion otch, 4 weir, top bodies for removing, and the weir body of AA line top for removing, B be that body 4 upset supporting-points in weir, top are the summit of explosion otch 3, C is the center of gravity of weir, top body 4.
Fig. 2 is Qingjian River transverse cofferdam section, cartridge bag position profile and quick-fried back sectional drawing.1 is the cofferdam that cuts out by explosion method in advance among the figure, and 2 is blast with linear charges, and 3 is cofferdam, the Qingjian River, and 4 is ground.
The demolition blasting method of toppling over, overturn of the present invention is Qingjian River roller compacted concrete cofferdam demolition blasting test; This test is carried out on the roller compacted concrete cofferdam of the Qingjian River.By the presplit blasting explosion cut out one as shown in Figure 2 weir crest be 1.6 meters wide 4 meters long cofferdam section.Because the inhomogeneities and the layered characteristic of roller compacted concrete cut out comparatively difficulty of 1.6 meters wide 4 meters long cofferdam by explosion method in advance, for this reason, test has adopted presplitting and blast to remove the scheme of onepull.Three row's segment blasts are adopted in test, and cartridge bag layout profile is seen accompanying drawing 2.Body the collapse bottom of weir, upstream body in weir, explosion upper back has reached the purpose of removing.Because the inhomogeneities of roller compacted concrete under Blast Loads is not to overturn as a whole after the blast of weir body, but outwards collapses with the form of the block that looses after the fragmentation; Bottom cartridge bag blast partly forms bulge at the cloth medicine, causes that also weir, top body has the motion of horizontal direction simultaneously, and this helps the weir body to collapse; Arrange according to the cartridge bag of this test, can shape slope, the end at 45 after the blast, there is not block to be detained on this slope.Result of the test shows that it is enforceable that method for turning demolition blasting concrete cofferdam is toppled in employing.
Claims (2)
1. explosion method for demolishing cofferdam, it is characterized in that: leave an explosion otch with explosive in the outside, cofferdam of intending the dismounting position, make weir, top body unstability, under the gravity effect cofferdam wait to remove part to opening one inclination fall, upset falls into to the root in the outside, cofferdam.
2. according to the said a kind of explosion method for demolishing cofferdam of claim 1, it is characterized in that: said method is carried out according to the following steps:
1) beat upright opening or inclined hole from weir crest, the bottom, hole surpasses intends removing the position, is perhaps removing the pre-buried pore of position level;
2) intending removing position Strap cartridge bag;
3) explosive funnel action index n 〉=0.75 of cartridge bag;
4) leave an explosion otch by the blast action of cartridge bag;
5) the explosion otch will satisfy the center of gravity C that removes the cofferdam body, is moved to outside the summit of otch;
6) removing after the position leaves the explosion otch with explosive, weir, top body unstability begins to topple over, turn to the root in the outside, cofferdam under the gravity effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00124802 CN1114088C (en) | 2000-09-12 | 2000-09-12 | Explosion method for demolishing cofferdam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00124802 CN1114088C (en) | 2000-09-12 | 2000-09-12 | Explosion method for demolishing cofferdam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1342882A true CN1342882A (en) | 2002-04-03 |
| CN1114088C CN1114088C (en) | 2003-07-09 |
Family
ID=4590669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00124802 Expired - Fee Related CN1114088C (en) | 2000-09-12 | 2000-09-12 | Explosion method for demolishing cofferdam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1114088C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089551A (en) * | 2014-04-11 | 2014-10-08 | 中国水利水电第十一工程局有限公司 | Old sluice directional incline, collapse, demolition and blasting construction method |
| CN109211041A (en) * | 2018-10-18 | 2019-01-15 | 中国葛洲坝集团第六工程有限公司 | A kind of retained rock step Blasting Demolition of Cofferdam method and its application |
| CN110520582A (en) * | 2017-04-13 | 2019-11-29 | 贝斯特罗株式会社 | That has applied flexibly the tower-like building of basic courses department pushes over method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333144C (en) * | 2005-10-31 | 2007-08-22 | 曲昕 | Directioning falling and detaching method for chimney-like building |
-
2000
- 2000-09-12 CN CN 00124802 patent/CN1114088C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089551A (en) * | 2014-04-11 | 2014-10-08 | 中国水利水电第十一工程局有限公司 | Old sluice directional incline, collapse, demolition and blasting construction method |
| CN110520582A (en) * | 2017-04-13 | 2019-11-29 | 贝斯特罗株式会社 | That has applied flexibly the tower-like building of basic courses department pushes over method |
| CN109211041A (en) * | 2018-10-18 | 2019-01-15 | 中国葛洲坝集团第六工程有限公司 | A kind of retained rock step Blasting Demolition of Cofferdam method and its application |
| CN109211041B (en) * | 2018-10-18 | 2021-03-30 | 中国葛洲坝集团建设工程有限公司 | Reserved rock bank cofferdam blasting demolition method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1114088C (en) | 2003-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107063014B (en) | Cutting shallow hole step controlled blasting slope cutting method in complex environment | |
| CN105926576B (en) | A method of it builds a dam for upper reaches method tailings alluviation and accelerates Tailings Slurry dewatering and coagulating | |
| CN202707073U (en) | Arch tunnel structure | |
| CN203008241U (en) | Large planting roof deformation gap structure | |
| CN1117197C (en) | Ribbed retaining wall | |
| CN1114088C (en) | Explosion method for demolishing cofferdam | |
| CN101832744A (en) | Blasting demolishing method | |
| CN203203487U (en) | Device of utilizing detonating pipes to buffer millisecond detonation damping | |
| CN202247902U (en) | Millisecond controlled blasting demolishing structure for foundation pit inner support beam | |
| CN207537970U (en) | A kind of precast concrete ecology staged bank protection prefabricated component | |
| CN101672613B (en) | Vibration-reducing blasting construction method of air spring | |
| CN106087902A (en) | The scupper cyclone shaft energy-dissipating structure processed for ditch-water and water discharge method | |
| CN111155539A (en) | Existing road side high cutting excavation construction method | |
| CN211174126U (en) | Open cut tunnel structure | |
| CN114719698B (en) | Ultra-long lower step blasting construction method based on blasting refinement analysis | |
| CN201473935U (en) | Diversion tunnel stone-pit structure | |
| CN103321643B (en) | A kind of excavation method of ox muzzle shape tunnel | |
| CN110374050A (en) | A kind of structure and method suitable for Landscape River anti-flood wall work stone veneer | |
| CN1013044B (en) | Cinder pile and its special construction apparatus | |
| CN111765824B (en) | Method for removing old dam | |
| CN208578059U (en) | A kind of barricade slope protection integration earthen structure | |
| CN108677980A (en) | Upstream cofferdam heightening method and structure with traffic function | |
| CN103306274B (en) | Sintering stake and sintering stake preparation method | |
| CN207893267U (en) | A kind of full packages and support construction for the conveying of grinding coagulation soil | |
| CN2316625Y (en) | High-efficient blasting cleavage controlling tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |