CN105088979B - Demolition blasting method for large bridge - Google Patents
Demolition blasting method for large bridge Download PDFInfo
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- CN105088979B CN105088979B CN201510554777.7A CN201510554777A CN105088979B CN 105088979 B CN105088979 B CN 105088979B CN 201510554777 A CN201510554777 A CN 201510554777A CN 105088979 B CN105088979 B CN 105088979B
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Abstract
The invention relates to a demolition method for a bridge, in particular to a demolition blasting method for a large bridge, and belongs to the technical field of bridge engineering application. The method comprises the following steps that firstly, an opening is formed in a bridge floor; secondly, a crawling ladder is erected; thirdly, a scaffold is erected; fourthly, a hanging basket is arranged; fifthly, a corridor and rails are erected; sixthly, drilling and powder charging are carried out; seventhly, demolition blasting is carried out; eighthly, detached objects are treated. The method has the advantages of being small in workload, high in efficiency, safe, reliable and the like.
Description
Technical field
The present invention relates to a kind of bridging toughening method, more particularly to a kind of large bridge blasting demolishing method, belong to bridge
Engineer applied technical field.
Background technology
It is well known that remove bridge principle of temporal sequence on newly building bridge conversely, i.e. bridge floor accessory structure → basic unit's concrete and
Bridge deck pavement → column floorings → spandrel column → arch rib → abutment and attached → dismounting thing are processed.Bridging toughening leads at present
Removed frequently with manually directly removing or setting up support, no matter removed using above-mentioned which kind of mode, which is all had workload
Greatly, efficiency it is low, it is dangerous high the shortcomings of.Especially large bridge, dismounting need to be carried out in the air in height, if using manually directly tearing open
Remove, its operation difficulty is bigger, it is dangerous higher.
The content of the invention
In order to overcome above technical problem, it is an object of the invention to provide a kind of high efficiency, safe and reliable Large bridge
Beam blasting demolishing method.
The present invention is achieved through the following technical solutions：A kind of large bridge blasting demolishing method, comprises the following steps：
Firstth, bridge floor opening：Break bridge floor on the bridge floor above bridge pier or column to be formed for opening that personnel, equipment pass through
Mouthful；
Secondth, set up cat ladder：Cat ladder is ridden upon at bridge floor opening, facilitates the current of personnel and equipment；
3rd, set up scaffold：Scaffold is set up at bridge pier by land, for personnel up and down, haulage equipment, drilling dress
Medicine, installation protection, laying corridor；
4th, hanging basket is set：Hanging basket is set above at the bridge floor opening, and hanging basket is lifted using elevator, it is convenient from bridge floor
Shipment personnel, equipment at opening, carry out boring quick-fried, construction of prevention work；
5th, corridor, railing are set up：Corridor is set up at the arch rib of bridge, facilitate workman current and equipment carry, in corridor
Set up railing in both sides；
6th, drilling, powder charge；
7th, demolition blasting；
8th, remove thing to process.
Compared with prior art, the invention has the beneficial effects as follows：
The present invention adopts demolition blasting large bridge, and which has the advantages that, and workload is little, efficiency high；And the present invention is big
Type bridge demolition Demolition Construction personnel provide a set of safe construction plateform system, and the method easy construction, system structure are simple
And good reliability, can effective protection workmen avoid falling accident, and can be the drilling of workmen, powder charge, blocking etc.
Series construction provides easily execution conditions, extremely meets the actual demand in terms of demolition blasting safety and efficiency；To sum up, this
Bright specific works amount is little, efficiency high, the advantages of safe and reliable.
Specific embodiment
Below by specific embodiment, the invention will be further described, but claimed scope is not limited to this reality
Apply the example content.
A kind of large bridge blasting demolishing method, comprises the following steps：
Firstth, bridge floor opening：Multiple length × a width of are broken using quartering hammer construction on the bridge floor above bridge pier or column
The bridge floor opening of 1.0m × 2.0m；
Secondth, set up cat ladder：Cat ladder is ridden upon at bridge floor opening, facilitates the current of personnel and equipment；
Cat ladder is formed using steel-pipe welding, upper and lower steel pipe spacing 0.4m, a width of 0.5m, and the length of several cat ladders is according to installation
Spatial altitude at position determines which can be 6m, 4m, 2m etc., and cat ladder is placed in after completing below each bridge floor opening
To bridge floor opening, personnel are up and down and equipment is carried for convenience, and it is to have constant slope that the cat ladder at column is laid；
3rd, set up scaffold：Scaffold is set up at bridge pier by land, for personnel up and down, haulage equipment, drilling dress
Medicine, installation protection, laying corridor；
The adjacent land bridge pier of scaffold is set up, and which adopts fastener type to assemble, and should follow claimed below when setting up：1. from one
Corner starts to both sides to extend hands over circle to set up, and first positions, vertical rod is connected with bar of sweeping the floor in length and breadth, bar of sweeping the floor
300mm is highly cannot be greater than, first step size cross bar is then set up, after correcting vertically and horizontally therewith, by the junction button of each bar
Tighten, and set up on demand, 2. scaffold two ends set bridging, bridging is 45 ° with ground angle, two ends rotary buckle and foot
The vertical rod of hand cradle or leger are buckled and increase by 2 ~ 4 therebetween and buckle a little, and 3. the deviation of vertical rod not should be greater than high 1/ of frame
300, and while controlling its absolute deviation values not should be greater than 75mm, the spreading position for 4. going up sheer pole should be staggeredly arranged different
In vertical rod advance, it is not more than 1/3rd of advance with close distance, the horizontal departure of same row's leger is not more than the piece
The 1/250 of scaffold total length, and no more than 50mm, the leger of adjacent step frame should be staggeredly arranged in the inboard of vertical rod and outer
Side, to reduce vertical rod eccentric force situation, the 5. button Lian Dianying for setting up middle vertical rod, horizon bar, little tringle, wall connecting rod of scaffold
With the connection of right angle button fastener, the extended spot of vertical rod mutually will stagger asynchronous away from interior, in connecting rod, leger, little cross bar
Fastener 20mm ~ 30mm should be stretched out in connection end；
4th, hanging basket is set：Hanging basket is set above at the bridge floor opening, and hanging basket is lifted using elevator, it is convenient from bridge floor
Shipment personnel, equipment at opening, carry out boring quick-fried, construction of prevention work；
Be used for lifting hanging basket in bridge floor overthe openings wire rope hoist, hanging basket and hoist engine is connected with steel cable, you can put
Lower hanging basket is used for constructing to bridge pier, and personnel equipment can pass in and out hanging basket, hanging basket after hanging basket is lifted with hoist engine to bridge floor
After installation, you can drilled as mobile work platform with hanging basket and charging, constructed using hoist engine adjustment
Position, hanging basket can be multiple；
5th, corridor, railing are set up：Corridor is set up at the arch rib of bridge, facilitate workman current and equipment carry, in corridor
Set up railing in both sides；
Corridor and railing are manufactured using steel pipe, the construction being mainly used at bridge arch, arch rib, and railing is gone back in addition to for corridor
Can be used for the security protection of cat ladder, railing is mainly fixed on cat ladder by the way of welding, tying up, is all provided with every bridge arch
One corridor, while being also provided with the longitudinal corridor of horizontal corridor connection forms network type passage, it is convenient current and fixed.
6th, drilling, powder charge；
Drill at appropriate position below bridge pier, column and bridge floor, and powder charge；
7th, demolition blasting；
The protection of surrounding safety is carried out, explosion is carried out to bridge；
8th, remove thing to process；
Dismounting thing after explosion is processed.
Claims (1)
1. a kind of large bridge blasting demolishing method, it is characterised in that：Comprise the following steps：
Firstth, bridge floor opening：Bridge floor is broken on the bridge floor above bridge pier or column forms the opening passed through for personnel, equipment；
Secondth, set up cat ladder：Cat ladder is ridden upon at bridge floor opening, facilitates the current of personnel and equipment；
3rd, set up scaffold：Scaffold is set up at bridge pier by land, for personnel up and down, haulage equipment, borehole charge, peace
Dress protection, laying corridor；
4th, hanging basket is set：Hanging basket is set above at the bridge floor opening, and hanging basket is lifted using elevator, it is convenient from bridge floor opening
Place shipment personnel, equipment, carry out boring quick-fried, construction of prevention work；
5th, corridor, railing are set up：Corridor is set up at the arch rib of bridge, facilitate workman current and equipment carry, on corridor both sides
Set up railing；
6th, drilling, powder charge；
7th, demolition blasting；
8th, remove thing to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510554777.7A CN105088979B (en) | 2015-09-04 | 2015-09-04 | Demolition blasting method for large bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510554777.7A CN105088979B (en) | 2015-09-04 | 2015-09-04 | Demolition blasting method for large bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105088979A CN105088979A (en) | 2015-11-25 |
| CN105088979B true CN105088979B (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510554777.7A Active CN105088979B (en) | 2015-09-04 | 2015-09-04 | Demolition blasting method for large bridge |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105648931B (en) * | 2015-12-31 | 2017-08-08 | 中铁二局集团有限公司 | A kind of blasting method of separate type overpass |
| CN107328322B (en) * | 2017-06-30 | 2018-09-21 | 中国建筑第七工程局有限公司 | Cable-stayed type truss bridge blasting method is held under one kind |
| CN107858941B (en) * | 2017-11-16 | 2019-06-28 | 南京交通工程有限公司 | A kind of hydraulic pressure demolition dismounting Prestressed Continuous Box Beam bridge construction technique |
| CN111648260A (en) * | 2020-04-27 | 2020-09-11 | 北京诺和兴建设工程有限公司 | Construction process for bridge demolition |
| CN115058989A (en) * | 2022-07-06 | 2022-09-16 | 中国十七冶集团有限公司 | Construction method for rapidly dismounting single-column-pier single-box-chamber box girder bridge |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005179924A (en) * | 2003-12-16 | 2005-07-07 | Sumitomo Mitsui Construction Co Ltd | Method for blowing up and demolishing reinforced concrete structure |
| JP4201633B2 (en) * | 2003-03-28 | 2008-12-24 | 三井住友建設株式会社 | Blasting and dismantling method of reinforced concrete structure |
| CN102839610A (en) * | 2012-09-17 | 2012-12-26 | 贵州新联***工程有限公司 | Demolition blasting method for prestress concrete cantilever trussed arch bridge |
| CN203593968U (en) * | 2013-11-30 | 2014-05-14 | 中铁二十局集团有限公司 | Steel tube bamboo row frame for shallow hole blasting excavation bridge foundation bit construction |
| CN104775367A (en) * | 2015-02-07 | 2015-07-15 | 河南理工大学 | Method for blasting demolition of bridge in urban area by controlling stepping-type sequential collapse |
-
2015
- 2015-09-04 CN CN201510554777.7A patent/CN105088979B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4201633B2 (en) * | 2003-03-28 | 2008-12-24 | 三井住友建設株式会社 | Blasting and dismantling method of reinforced concrete structure |
| JP2005179924A (en) * | 2003-12-16 | 2005-07-07 | Sumitomo Mitsui Construction Co Ltd | Method for blowing up and demolishing reinforced concrete structure |
| CN102839610A (en) * | 2012-09-17 | 2012-12-26 | 贵州新联***工程有限公司 | Demolition blasting method for prestress concrete cantilever trussed arch bridge |
| CN203593968U (en) * | 2013-11-30 | 2014-05-14 | 中铁二十局集团有限公司 | Steel tube bamboo row frame for shallow hole blasting excavation bridge foundation bit construction |
| CN104775367A (en) * | 2015-02-07 | 2015-07-15 | 河南理工大学 | Method for blasting demolition of bridge in urban area by controlling stepping-type sequential collapse |
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| Publication number | Publication date |
|---|---|
| CN105088979A (en) | 2015-11-25 |
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Address after: 550002, 14 floor, Fu Zhong commercial building, No. 102 Xinhua Road, Nanming District, Guiyang, Guizhou. Patentee after: Poly Xinlian Blasting Engineering Group Co., Ltd. Address before: 550002, 14 floor, Fu Zhong commercial building, No. 102 Xinhua Road, Nanming District, Guiyang, Guizhou. Patentee before: Guizhou Xinlian Blasting Engineering Group Co., Ltd. |