CN106907021A - Steel and concrete structure enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method - Google Patents
Steel and concrete structure enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method Download PDFInfo
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- CN106907021A CN106907021A CN201710258610.5A CN201710258610A CN106907021A CN 106907021 A CN106907021 A CN 106907021A CN 201710258610 A CN201710258610 A CN 201710258610A CN 106907021 A CN106907021 A CN 106907021A
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- big vast
- hole
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- bridge pier
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Enter big vast lock Bridge Pier shaping Cutting Blasting Demolition method the invention discloses a kind of steel and concrete structure, comprise the following steps：(1) basic structure and original state into big vast lock are recognized；(2) burst region division is carried out to entering Hong Zha, laying cuts line, clearly cuts part and member-retaining portion；(3) laid above line row's shock relieve vent along cutting on part entering cutting for big vast lock Bridge Pier, the pre- ceasma of a row, the spaced loading in pre- ceasma are made a call to above shock relieve vent；(4) row is made a call to above pre- ceasma and weakens blast hole, weakening spaced loading in blast hole；(5) the main blast hole of a row, the spaced loading in main blast hole are made a call to above decrease blast hole；(6) after properly protecting, using disposable detonation mode demolition blasting.The characteristics of present invention has saving blasting cost, lifting economic benefit, raising shotfiring safety, it is adaptable to Hydraulic and Hydro-Power Engineering, architectural engineering, the demolition blasting of all kinds of steel and concrete structure bridge piers in science of bridge building field.
Description
Technical field
The present invention relates to Blasting Demolition Technology field, more particularly to a kind of steel and concrete structure enters big vast lock Bridge Pier shaping cutting
Blasting demolishing method.
Background technology
Have both the intake gate drained off floodwater with navigation function, it is past with the growth and the change of national regulation of use time
Toward there are problems that sluicing, not smooth, gate branch hinge burn into opening and closing device is outmoded and standard deviation is low, to improve flood control antidetonation and logical
Row ability, it is necessary to carry out partial demolition and reinforce reconstruction.
Conventional steel and concrete structure method for dismounting has demolition blasting method, mechanical removal method and manual demolition method etc. at present, wherein,
Demolition blasting method with its short time limit, economize on resources and be safe the features such as, show applicability higher.Cutting Blasting method
Using blasting technique, it is capable of achieving to building, the control of structures implosion rupture seam propagation direction, then realizes to building, structures
Shaping cutting.
It is all kinds of build, in the demolishing process of structures, it will usually run into and certain steel and concrete structure removed into a part, while retaining
Another part, has reached the purpose of saving fund.Actually build, during the demolition blasting of structures, because theory lacks and advises
Model disunity, majority construction is all, by engineering experience, the demolition blasting theoretical system of system not to be formed then, to engineering cost
Rationally control can not be realized.Meanwhile, enter big vast lock Bridge Pier shaping Cutting Blasting in steel and concrete structure in existing demolition blasting achievement and tear open
Research blank in terms of except method.
Therefore a kind of steel and concrete structure of offer is needed badly to enter big vast lock Bridge Pier shaping Cutting Blasting Demolition method to solve above-mentioned asking
Topic.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of steel and concrete structure to be entered big vast lock Bridge Pier shaping Cutting Blasting and tears open
It is simple to operate except method, feasibility, high safety.
In order to solve the above technical problems, one aspect of the present invention is：A kind of steel and concrete structure is provided and enters Hong Zha
Bridge Pier is molded Cutting Blasting Demolition method, comprises the following steps：
(1) basic structure and original state into big vast lock are recognized；
(2) burst region division is carried out to entering Hong Zha, laying cuts line, clearly cuts part and member-retaining portion；
(3) laid above line row's shock relieve vent along cutting on part entering cutting for big vast lock Bridge Pier, above shock relieve vent
Make a call to the pre- ceasma of a row, the spaced loading in pre- ceasma；
(4) the main blast hole of a row, the spaced loading in main blast hole are made a call to above pre- ceasma；
(5) after properly protecting, using disposable detonation mode demolition blasting.
In a preferred embodiment of the present invention, square shaped enters big vast lock burst region, pre- ceasma and main blast hole it
Between make a call to again a row weaken blast hole, weaken blast hole in spaced loading.
In a preferred embodiment of the present invention, in step (1), measure that lock is long, lock according to big vast brake structure design drawing is entered
It is wide high with lock, specify the physical dimension of headstock gear, maintenance bridge and access bridge, Site Detection bridge floor material.
In a preferred embodiment of the present invention, in step (2), the foundation that the burst region is divided is into the design of big vast lock
Elevation and basic structure feature, to enhance the capacity of preventing floods, the traffic capacity and are continuing with the time limit, to it is built enter big vast brake structure enter
Row demolition blasting part-structure is reinforced when rebuilding, and big vast brake structure years already spent, structural failure and top layer corrosion feelings are entered according to original
Condition, original structure existing concrete intensity, original structure arrangement of reinforcement arrangement, owner require, intend rebuilding reinforcement scheme into big vast brake structure, intend
Rebuild the design height into big vast brake structure, demolition blasting construction needs etc. and divide burst region.What different burst regions was used
Blasting method is otherwise varied, for example, original enters part where big vast lock bracket, it is not necessary to set and weaken blast hole；Original enters big vast brake structure
Headstock gear framed bent part, is cut broken using machinery.
Further, the aperture of shock relieve vent is 38mm, and pitch-row is 20cm, is beaten to perforation, is 120cm per side opening depth.
Further, at the 10cm of shock relieve vent top, aperture is 38mm to presplitting hole position, and pitch-row is 30cm, and hole depth is
110cm。
Further, weaken blast hole to be located at the 15cm of pre- ceasma top, aperture is 38mm, and pitch-row is 50cm, and hole depth is
110cm。
Further, main blast hole is located at and weakens at the 30cm -100cm of blast hole top, and aperture is 38mm, and pitch-row is
50cm, hole depth is 110cm.
Further, the mode of spaced loading is away between bottom hole 10cm depth part coupling chargings, the center section in hole
Every powder charge, the section of blocking up of cave entrance reservation 10cm depth is 4-5 times of hole center section aperture away from bottom hole 10cm depth parts.
Further, in step (5), detonation mode is using same section of other detonator once blasting, each hole unit consumption control
In 0.5-1.2kg/m3Between, pre- ceasma with primacord load, be bundled into using three primacords it is a branch of, in load hole, as pre-
Ceasma pack.
The beneficial effects of the invention are as follows：
(1) the method for the invention it is simple and reliable, shaping good cutting effect, by recognize into big vast this structure type of sluice foundation with
Original state, can preferably select blasting method and divide burst region, and rational burst region is divided and blasting parameter selection
Ensure that good shaping cutting effect；
(2) the method for the invention cost is relatively low, high financial profit, quick-fried by Reasonable Arrangement shock relieve vent, pre- ceasma and master
Hole, and by the way of spaced loading, detonator consumption is reduced, then reduce cost；
(3) the method for the invention construction system is strong, reliability is high, technical maturity, workable, while ensure that
Presplitting effect；
(4) the method for the invention can be entered for Hydraulic and Hydro-Power Engineering, architectural engineering, all kinds of steel and concrete structures in science of bridge building field
The demolition blasting of big vast lock Bridge Pier provides reliable method support.
Brief description of the drawings
Fig. 1 is the flow that steel and concrete structure of the present invention enters the preferred embodiment of big vast lock Bridge Pier shaping Cutting Blasting Demolition method one
Figure；
Fig. 2 is that single lock body burst region divides schematic diagram；
Fig. 3 is A, B area cloth hole schematic diagram；
Tu4Shi C areas cloth hole schematic diagram；
Fig. 5 is the cross-sectional view for weakening spaced loading in blast hole, main blast hole；
The mark of each part is as follows in accompanying drawing：1st, line is cut, 2, member-retaining portion, 3, cut part, 4, shock relieve vent, 5, presplitting
Hole, 6, weaken blast hole, 7, main blast hole, 8, line of cut, 9, pilot hole, 10, explosive, 11, section of blocking up, 12, primacord.
Specific embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, apparent is clearly defined so as to be made to protection scope of the present invention.
Fig. 1 is referred to, a kind of steel and concrete structure enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, comprises the following steps：
(1) basic structure and original state into big vast lock are recognized；
(2) burst region division is carried out to entering Hong Zha, laying cuts line 1, clearly cuts part 3 and member-retaining portion 2；
(3) one row's shock relieve vent 4 of the top of line 1 laying is cut on the edge on part 3 that cuts for entering big vast lock Bridge Pier, in shock relieve vent 4
The pre- ceasma 5 of a row, the spaced loading in pre- ceasma 5 are made a call in top；
(4) make a call to a row in the top of pre- ceasma 5 and weaken blast hole 6, weaken spaced loading in blast hole 6；
(5) the main blast hole 7 of a row, the spaced loading in main blast hole 7 are made a call in the top of decrease blast hole 6；
(6) after properly protecting, using disposable detonation mode demolition blasting.
The steel and concrete structure is specifically described with reference to an embodiment enter big vast lock Bridge Pier shaping Cutting Blasting Demolition method：
1) certain enter Hong Zha have both flood control and traffic be used.Lock is long：Enter big vast lock 36 across single span 10m long, bridge pier 1.2m wide enter
Big vast lock overall length 403m；Lock is wide：Enter big vast lock beam overall 17.5m, access bridge 6.455m wide, headstock gear lock chamber part 11.04m wide, open and close
Machine column is located between maintenance bridge and access bridge, and maintenance bridge location is in west of a city lake side.Lock is high：(bridge base plate is high to enter big vast lock 13.5m high
Journey 22.9, headstock gear cope level 36.4), base plate to bridge floor 7.6m, bridge floor to headstock gear top 5.9m high.Physical dimension：Open
Frame is closed for double pillar construction, basal area is 70cm × 110cm, it is that two reinforced concrete beams are put down with bridge floor to open and close board
On row accumbency column, bridge floor is single arched by 5 20cm thickness, sheet arch rib composition 60cm high, and bridge floor is armored concrete
Mat formation, there is one expansion joint concrete road surface every 11.2m.To improve flood control antidetonation and the traffic capacity, it is necessary to carry out part
Remove to reinforce and rebuild.
2) combine Fig. 2, enter the Bridge Pier of big vast lock access bridge position bottom comprising member-retaining portion 2 with cut part 3, wherein digging
Except part 3 can be divided into 4 blast areas.A areas：Elevation 27.00-30.50, width 6.455m is a 100cm × 645.5cm
Rectangular region；B areas：Elevation 30.90-31.90, is the region of 100cm × 264.5cm；C areas：Bracket position, be
One inverted trapezoidal structure, elevation is in 26.40-31.90, upper width 5700cm, lower width 3000cm；D areas：It is headstock gear
Framed bent.
3) Fig. 3 is referred to, the blasting method to A areas, B areas is：Shock relieve vent 4 is laid along the top of line 1 is cut, and aperture is
38mm, pitch-row is 20cm, is beaten to perforation, is 120cm per side opening depth；Pre- ceasma 5 is beaten at the top 10cm of shock relieve vent 4, aperture is
38mm, pitch-row is 30cm, and hole depth is 110cm, is bundled into three primacords 12 a branch of, loads the hole, as the pack of pre- ceasma 5；
A row is made a call at the top 15cm of pre- ceasma 5 and weakens blast hole 6, aperture is 38mm, and pitch-row is 50cm, and hole depth is 110cm, between
Every powder charge；Make a call to the main blast hole 7 of a row at 30cm above hole weakening, aperture is 38mm, and hole depth is 110cm, and pitch-row is 50cm,
Using decked charge fashion, but improve explosive specific charge.From cut line 1 be upwardly into pre- ceasma 5 between for 15cm thickness protective layer,
Peeled off using pneumatic pick.
4) Fig. 4 is referred to, the blasting method to C areas is：Shock relieve vent 4 is laid along the top of line 1 is cut, aperture is 38mm, hole
Away from being 20cm, beat to perforation, be 120cm per side opening depth；Pre- ceasma 5 is beaten at the top 10cm of shock relieve vent 4, aperture is 38mm, hole
Away from being 30cm, hole depth is 110cm, same to A, B area of charging means；Main blast hole 7, the pitch-row of main blast hole 7 are laid in the top of pre- ceasma 5
It is 100cm, aperture is 38mm, and hole depth is 110cm, explosive specific charge powder charge is diagonally gradually reduced from maintenance bridge turning；
Pilot hole 9 is provided between the shock relieve vent of corner of C areas, pilot hole 9 uses emptying aperture, not powder charge.
Kong Jun in above-mentioned burst region is drilled using YT24 airleg rock drills, and other applicable rigs include
Hand-held shallow bore hole rig, voluntarily medium-length hole rig, medium-length hole rig.
5) D areas：Cut using machinery upwards from elevation 31.90 broken.
6) Fig. 5 is referred to, the mode of spaced loading is that coupling charging is dress away from bottom hole 10cm depth part coupling chargings
It is full, fill tight explosive 10, to reduce ultra-deep, the center section spaced loading in hole, the section 11 of blocking up of cave entrance reservation 10cm depth, away from
Bottom hole 10cm depth parts are 4-5 times of hole center section aperture.More than each hole according to different parts, unit consumption control 0.6-
1.2kg/m3Between, pre- ceasma 5 is loaded with primacord 12, the not powder charge of shock relieve vent 4, it is considered to have that primacord 12 is loaded and old bridge is mixed
The carbonization of soil is coagulated, dose drops to 0.5kg/m3.All powder charge holes use spaced loading method.
7) ensure that the successful pretreating process of presplitting is：Rule along 10cm on line 1 is cut, at online top 5cm simultaneously
Standardized bar parallel lines；Electricity consumption saw cut, depth of cut is advisable with exposed steel bar；Reject mixed in the middle of twice line of cut 8 with pneumatic pick
Solidifying soil；With oxyacetylene metal-cutting, the vertical reinforcement for exposing is cut off；Shock relieve vent 4, pre- ceasma 5 must be smoothed out, and up-down error is not more than 3cm, left and right
Error is not more than 5cm；Vertical reinforcement will thoroughly cut, and not stay residuum；Concrete pneumatic pick between shock relieve vent 4 and pre- ceasma 5
Peel off, reject concrete structure, expose the reinforcing bar of reserved 15cm as the connecting material of the perpendicular muscle of subsequent reinforcement engineering.
8) after properly protecting, using disposable detonation mode demolition blasting.Detonation mode is using same section of other detonator
Once detonation, the detonation mode can reach preferably cutting effect.
The method of the invention is simple and reliable, shaping good cutting effect, by recognize into big vast this structure type of sluice foundation with it is first
Beginning state, can preferably select blasting method and divide burst region, and rational burst region is divided protects with blasting parameter selection
Good shaping cutting effect is demonstrate,proved；Low cost, high financial profit, by Reasonable Arrangement shock relieve vent, pre- ceasma and main blast hole, and
By the way of spaced loading, detonator consumption is reduced, then reduce cost；Construction system is strong, reliability is high, technique into
It is ripe, workable, while ensure that presplitting effect；Can be Hydraulic and Hydro-Power Engineering, architectural engineering, all kinds of steel in science of bridge building field
The demolition blasting that mixed structure enters big vast lock Bridge Pier provides reliable method support.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of steel and concrete structure enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, comprises the following steps：
(1) basic structure and original state into big vast lock are recognized；
(2) burst region division is carried out to entering Hong Zha, laying cuts line, clearly cuts part and member-retaining portion；
(3) laid above line row's shock relieve vent along cutting on part entering cutting for big vast lock Bridge Pier, one is made a call to above shock relieve vent
Pre- ceasma is arranged, the spaced loading in pre- ceasma；
(4) the main blast hole of a row, the spaced loading in main blast hole are made a call to above pre- ceasma；
(5) after properly protecting, using disposable detonation mode demolition blasting.
2. steel and concrete structure according to claim 1 enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, it is characterised in that
Square shaped enters big vast lock burst region, a row is made a call between pre- ceasma and main blast hole again and weakens blast hole, is weakening blast hole
Interior spaced loading.
3. steel and concrete structure according to claim 1 enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, it is characterised in that
In step (1), measure that lock is long, lock is wide high with lock according to big vast brake structure design drawing is entered, specify headstock gear, overhaul bridge and access bridge
Physical dimension, Site Detection bridge floor material.
4. steel and concrete structure according to claim 1 enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, it is characterised in that
In step (2), the foundation that burst region is divided enters big vast lock design altitude, original and enters big vast brake structure years already spent, structure including original
Damage and required with top layer corrosion condition, original structure existing concrete intensity, original structure arrangement of reinforcement arrangement, owner, intend rebuilding into Hong Zha
The reinforcement scheme of structure, plan rebuild design height, the demolition blasting construction needs into big vast brake structure.
5. steel and concrete structure according to claim 1 and 2 enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, and its feature exists
In the aperture of shock relieve vent is 38mm, and pitch-row is 20cm, is beaten to perforation, is 120cm per side opening depth.
6. steel and concrete structure according to claim 1 and 2 enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, and its feature exists
In at the 10cm of shock relieve vent top, aperture is 38mm to presplitting hole position, and pitch-row is 30cm, and hole depth is 110cm.
7. steel and concrete structure according to claim 2 enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, it is characterised in that
Weaken blast hole to be located at the 15cm of pre- ceasma top, aperture is 38mm, and pitch-row is 50cm, and hole depth is 110cm.
8. steel and concrete structure according to claim 1 and 2 enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, and its feature exists
In main blast hole is located at and weakens at the 30cm -100cm of blast hole top, and aperture is 38mm, and pitch-row is 50cm, and hole depth is 110cm.
9. steel and concrete structure according to claim 1 and 2 enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, and its feature exists
In the mode of spaced loading is away from bottom hole 10cm depth part coupling chargings, the center section spaced loading in hole, cave entrance reservation
The section of blocking up of 10cm depth, is 4-5 times of hole center section aperture away from bottom hole 10cm depth parts.
10. steel and concrete structure according to claim 1 and 2 enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method, its feature
It is that in step (5), detonation mode is that each hole unit consumption control is in 0.5-1.2kg/ using same section of other detonator once blasting
m3Between, pre- ceasma with primacord load, be bundled into using three primacords it is a branch of, in load hole, as pre- ceasma pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710258610.5A CN106907021A (en) | 2017-04-19 | 2017-04-19 | Steel and concrete structure enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710258610.5A CN106907021A (en) | 2017-04-19 | 2017-04-19 | Steel and concrete structure enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method |
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| Publication Number | Publication Date |
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| CN106907021A true CN106907021A (en) | 2017-06-30 |
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ID=59211068
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710258610.5A Pending CN106907021A (en) | 2017-04-19 | 2017-04-19 | Steel and concrete structure enters big vast lock Bridge Pier shaping Cutting Blasting Demolition method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708305A (en) * | 2018-05-28 | 2018-10-26 | 广西路桥工程集团有限公司 | A kind of construction method of low pier bridging toughening |
| CN112923820A (en) * | 2021-02-09 | 2021-06-08 | 江西荣达爆破新技术开发有限公司 | Perforation charge explosion method suitable for blasting demolition of middle upright column |
| CN113137898A (en) * | 2021-03-25 | 2021-07-20 | 中国能源建设集团广西水电工程局有限公司 | Cofferdam blasting demolition method based on combination of variable linear density charging and digital electronic detonator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108708305A (en) * | 2018-05-28 | 2018-10-26 | 广西路桥工程集团有限公司 | A kind of construction method of low pier bridging toughening |
| CN108708305B (en) * | 2018-05-28 | 2020-05-01 | 广西路桥工程集团有限公司 | Construction method for dismantling low-pier bridge |
| CN112923820A (en) * | 2021-02-09 | 2021-06-08 | 江西荣达爆破新技术开发有限公司 | Perforation charge explosion method suitable for blasting demolition of middle upright column |
| CN113137898A (en) * | 2021-03-25 | 2021-07-20 | 中国能源建设集团广西水电工程局有限公司 | Cofferdam blasting demolition method based on combination of variable linear density charging and digital electronic detonator |
| CN113137898B (en) * | 2021-03-25 | 2022-10-21 | 中国能源建设集团广西水电工程局有限公司 | Cofferdam blasting demolition method based on combination of variable-linear-density charging and digital electronic detonator |
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