CN103898842B - Reinforced concrete arch bridge blasting demolishing method - Google Patents
Reinforced concrete arch bridge blasting demolishing method Download PDFInfo
- Publication number
- CN103898842B CN103898842B CN201210585935.1A CN201210585935A CN103898842B CN 103898842 B CN103898842 B CN 103898842B CN 201210585935 A CN201210585935 A CN 201210585935A CN 103898842 B CN103898842 B CN 103898842B
- Authority
- CN
- China
- Prior art keywords
- arch
- bridge
- springing
- big gun
- reinforced concrete
- 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.)
- Active
Links
Abstract
The invention discloses a kind of reinforced concrete arch bridge blasting demolishing method, comprise the following steps: big gun hole is set, be respectively equipped with several big gun holes in the vault of reinforced concrete arch bridge main arch, left arch springing, right arch springing position；Explosive, explosive in hole, each big gun hole are installed；Arrange delay detonating detonator, described vault, left arch springing, right arch springing big gun hole hole in be respectively provided with delay detonating detonator one, be respectively provided with delay detonating detonator two outside hole, and its bunch be linked togather；Main arch security protection；Demolition blasting, detonate described vault, more left arch springing described in delayed ignition and right arch springing, it is achieved the demolition blasting of described arch bridge.This method big gun hole arrangement is reasonable, effectively reduces reinforced concrete arch bridge Harmful effects from blasting, and the safeguard procedures taked on arch bridge ensure that around protected object is intact and personal safety as well as the property safety, stop safety hazards and occur；Explosion slag muck is more concentrated and is convenient to clean simultaneously, is effectively reduced the pollution to environment.
Description
Technical field
The present invention relates to a kind of field of bridge construction, particularly to a kind of reinforced concrete arch bridge demolition blasting side
Method.
Background technology
Reinforced concrete arch bridge is widely applied in the road construction of modern society, the most greatly
Criticize the reinforced concrete arch bridge built in early days because a variety of causes becomes unsafe bridge, need to carry out dismounting process.By
In artificial and mechanical removal potential safety hazard is too big, the most general employing controlled blasting scheme is removed,
Explosion is that the one of bridging toughening is safe and reliable, quick way, but the reinforced concrete arch bridge in cities and towns
Use all many safety such as blasting demolishing method necessary strict controlled blasting vibration, slungshot, bridge structure
Factor.Removed for reinforced concrete arch bridge uses the mode of hydraulic pressure demolition to remove in the past mostly, but
In the case of bridge self belongs to unsafe bridge, hydraulic pressure demolition is used just to increase the potential safety hazard of operation, and
Explosion disintegrating slag not only environmental pollution is relatively big, cleaning trouble, also easily causes the building to surrounding, crowd's product
Raw injury；Meanwhile, demolition blasting 1 hole relatively long distance clear span (such as more than 50m) under cities and towns relatively complex environment
Reinforced concrete arch bridge, referential domestic successful explosion experience is considerably less.
Summary of the invention
It is an object of the invention to overcome the employing hydraulic pressure demolition in the presence of prior art to reinforced concrete arch
Bridge carry out demolition blasting potential safety hazard more greatly, the most domestic to single hole compared with the one-tenth of long span reinforced concrete arch bridge
The less above-mentioned deficiency of merit explosion experience, it is provided that a kind of easy to operate, steel that safety is high, low in the pollution of the environment
Reinforced concrete arch bridge blasting demolishing method.
In order to realize foregoing invention purpose, the invention provides techniques below scheme:
A kind of reinforced concrete arch bridge blasting demolishing method, comprises the following steps:
Step one, big gun hole is set, in the vault of reinforced concrete arch bridge main arch, left arch springing, right arch springing position
It is respectively equipped with several big gun holes；
Step 2, explosive is installed, described vault, left arch springing, right arch springing hole, each big gun hole in place fried
Medicine；
Step 3, layout delay detonating detonator, the hole, big gun hole on described vault, left arch springing, right arch springing
Inside it is respectively provided with delay detonating detonator one, outside hole, is respectively provided with delay detonating detonator two, by described extension
Nonel detonator one, delay detonating detonator two bunches are linked togather；
Step 4, main arch protect, and the safety that described reinforced concrete arch bridge main arch carries out anti-blasting flyrock is prevented
Protect；
Step 5, demolition blasting, pass sequentially through described extension and lead quick-fried detonator two, delay to lead quick-fried detonator one and first rise
Explosive in big gun hole on quick-fried described vault, then on left arch springing described in delayed ignition on the explosive in big gun hole, right arch springing
The explosive in big gun hole, it is achieved the blasting in once-through of described reinforced concrete arch bridge is removed.
Preferably, delay detonating detonator in the hole, big gun hole of vault, left arch springing, right arch springing in described step 3
One is msdelayed light emission Nonel detonator.
Preferably, hole, the big gun hole male extension Nonel detonator of vault, left arch springing, right arch springing in described step 3
Two is half second elementary errors Nonel detonator.
Preferably, the explosive initiation time delay 350～650ms in described vault big gun hole, described left arch springing, right arch springing with
Described vault time difference detonating delay time is 350～650ms.
Preferably, in described step 4, the left arch springing of main arch, right arch springing employing straw mattress, gunnysack carry out parcel and prevent
Protecting, described vault uses sandbag to carry out ballast protection.
Preferably, described reinforced concrete arch bridge includes that access bridge encircles, near the described master of described access bridge arch side
Arch arch springing postpones 350～650ms than the main arch arch springing burst time away from access bridge arch side, described access bridge arch ratio
350～650ms are postponed near the described main arch arch springing burst time of access bridge arch side.
Preferably, described access bridge arch both sides have built protection sand stalk and steel pipe protective frame, described steel pipe protective frame by laying bricks or stones
On be equipped with protection network.
Compared with prior art, beneficial effects of the present invention:
Reinforced concrete arch bridge blasting demolishing method of the present invention is by the vault of main arch, left arch springing, the right side
Arch springing layout big gun hole also arranges firing order, and big gun hole arrangement is reasonable, effectively reduces reinforced concrete arch bridge
Harmful effects from blasting, and take safeguard procedures on arch bridge, it is possible to ensure around protected object intact and
Personal safety as well as the property safety, stops safety hazards and occurs；Explosion slag muck is more concentrated and is convenient to clean simultaneously, has
Imitate decreases the pollution to environment；The method can apply double curvature arched bridge, box arch bridge demolition blasting on,
And it is applicable to the demolition blasting of the reinforced concrete arch bridge of relatively long distance clear span (such as more than 50m).
Accompanying drawing illustrates:
Fig. 1 is concrete-steel arch bridge blasting demolishing method flow chart of the present invention.
Fig. 2 is concrete-steel arch bridge structure schematic diagram of the present invention.
Fig. 3 is the big gun hole schematic diagram arranged on main arch of the present invention.
Fig. 4 is the big gun hole schematic cross-section arranged on main arch of the present invention.
Labelling in figure:
1, main arch, 101, vault, 102, left arch springing, 103, right arch springing, 104, soffit, 2, access bridge
Arch, 3, access bridge arch springing, 4, big gun hole.
Detailed description of the invention
Below in conjunction with test example and detailed description of the invention, the present invention is described in further detail.But should be by
This is interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to below example, all real based on present invention institute
Existing technology belongs to the scope of the present invention.
As Figure 1-4, a kind of reinforced concrete arch bridge blasting demolishing method, comprise the following steps:
Step one S01, big gun hole is set, the vault 101 of reinforced concrete arch bridge main arch 1, left arch springing 102,
Right arch springing 103 position is respectively equipped with several big gun holes 4；
Step 2 S02, install explosive, described vault 101, left arch springing 102, right arch springing 103 each
Explosive in hole, big gun hole 4；
Step 3 S03, layout delay detonating detonator, at described vault 101, left arch springing 102, right arch springing
It is respectively provided with delay detonating detonator one on 103 in the hole in big gun hole 4, outside hole, is respectively provided with delay detonating detonator
Two, described delay detonating detonator one, delay detonating detonator two bunches are linked togather；
Step 4 S04, main arch 1 protect, and described reinforced concrete arch bridge main arch 1 is carried out anti-blasting flyrock
Security protection；
Step 5 S05, demolition blasting, pass sequentially through described extension and lead quick-fried detonator two, delay to lead quick-fried detonator one first
The explosive detonated on described vault 101 in big gun hole 4, then big gun hole 4 on left arch springing 102 described in delayed ignition
The explosive in big gun hole 4 on explosive, right arch springing 103, it is achieved the blasting in once-through of described reinforced concrete arch bridge is torn open
Remove.
Wherein, in above-mentioned steps one S01, at vault 101, the left arch springing of reinforced concrete arch bridge main arch 1
102, big gun hole 4 number that right arch springing 103 position is respectively equipped with, be according to vault 101, left arch springing 102,
The size of right arch springing 103 determines the size in big gun hole 4, the degree of depth, number, and the spacing in each two big gun hole 4
The array pitch (as shown in b in Fig. 3) in (as shown in a in Fig. 3), every artillery salvo hole 4；Corresponding steps two S02
The unit losing quantity of middle explosive also by size of bridge etc. because usually determining.Owing to reinforced concrete arch bridge is permissible
It is the main arch composition of various ways, such as box arch bridge, ribbed arch bridge, double curvature arched bridge, rigid framed arch bridge, truss arch
Bridge, simple system and combined system arch bridge etc., big gun hole 4 distributed quantity of each of the configurations main arch 1 and size
Then can change to adapt to its arch bridge shape accordingly, such as, when main arch 1 encircles for box, its main arch 1 be arranged
Big gun hole 4 be then uniformly distributed wanted explosion box arch each box unit on, as shown in Figure 4.
Above-mentioned steps three S03 delays to lead in the hole, big gun hole 4 of vault 101, left arch springing 102, right arch springing 103
Booster detonator one is msdelayed light emission Nonel detonator, and hole male extension Nonel detonator two is half second elementary errors detonator
Detonator；It is time delay 350～650ms by the explosive initiation set of time in the big gun hole 4 of vault 101, left arch springing 102,
Right arch springing 103 is 350～650ms with vault 101 time difference detonating delay time, the vault of main arch 1 in this case
101 first detonate, and detonate the most simultaneously, carry out quick-fried by main arch 1 after the most left arch springing 102, right arch springing 103 time delay
After Po, the column of main arch more than 1, bridge floor are just removed by gravity；According further to being actually needed and
Speech, may also take on the time difference between left arch springing 102, right arch springing 103 detonates.
Explosion section is mainly protected by the safeguard procedures in step 4 S04, such as can be at left arch springing
102, right arch springing 103 also soffit uses three layers of straw mattress, two-layer gunnysack to carry out parcel protection, and vault 1 is adopted
Ballast protection is carried out with sandbag.
It addition, existing reinforced concrete arch bridge is also associated with access bridge arch 2, also want when main arch 1 carries out explosion
Access bridge arch 2 is carried out demolition blasting together, it is therefore desirable to big gun hole 4 is set on access bridge arch 2 equally with corresponding
Explosive, delay detonating detonator detonator.When detonating delay time is arranged, the vault 101 of main arch 1 is first ignited,
Postpone after 350～650ms encircle near access bridge main arch 1 arch springing (such as left arch springing 102) of 2 sides than away from
Access bridge encircles main arch 1 arch springing (such as right arch springing 103) evening burst time 350～650ms of 2 sides, and access bridge arch
2 is more late than described main arch 1 arch springing of close access bridge arch springing 3 side (such as the left arch springing 102) burst time
350～650ms,；Thus can be formed explosion vault 101 successively, away from access bridge arch 2 right arch springing 103 successively,
Near left arch springing 102, the access bridge arch 2 of access bridge arch 2, realize the dismounting of whole reinforcing bar slow setting soil arch bridge in order.
Particularly, owing to access bridge arch 2 typically grouts bar stone structure, deadweight is relatively big, quick-fried for avoiding access bridge to encircle 2
Break when caving in, protected object around (such as building thing, lower road) to be produced and destroy, cave at it
In the range of use flexible cushion protection damping, concrete grammar is: such as consider access bridge encircle 2 long 2m, use soft
Property material (such as fine sand, without stone earth or bundled haystack) is laid on collapse range, bed course size length,
Wide, thickness is respectively 20m × 15m × (0.5～1.5m), encircles 2 both sides 5m scopes at access bridge simultaneously and respectively builds by laying bricks or stones
The husky ridge of 60m length protection, as husky ridge size length is respectively 60m × (1.2～2.0m) × (1.0～1.5m),
Secondly set up double-row steel pipe protective frame in next-door neighbour Sha Geng side, and lay soft protecting net and prevent slungshot injury of contacting to earth
Protected object, ready after carry out demolition blasting again.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.
Claims (6)
1. a reinforced concrete arch bridge blasting demolishing method, it is characterised in that comprise the following steps:
Step one, big gun hole (4) is set, the vault (101) of reinforced concrete arch bridge main arch (1), left arch springing (102),
Right arch springing (103) position is respectively equipped with several big gun holes (4)；
Step 2, installation explosive, at described vault (101), left arch springing (102), each big gun of right arch springing (103)
Explosive in hole (4) hole；
Step 3, layout delay detonating detonator, at described vault (101), left arch springing (102), right arch springing (103)
Big gun hole (4) hole in be respectively provided with delay detonating detonator one, be respectively provided with delay detonating detonator two outside hole,
Described delay detonating detonator one, delay detonating detonator two bunches are linked togather；
Step 4, main arch (1) protect, and described reinforced concrete arch bridge main arch (1) carries out the peace of anti-blasting flyrock
Full protection；
Step 5, demolition blasting, pass sequentially through described extension and lead quick-fried detonator two, delay to lead quick-fried detonator one and first rise
In explosive in the upper big gun hole (4) of quick-fried described vault (101), the upper big gun hole (4) of left arch springing (102) described in delayed ignition
Explosive in the upper big gun hole of explosive, right arch springing (103), it is achieved the blasting in once-through of described reinforced concrete arch bridge is torn open
Remove；
In described step 5, described reinforced concrete arch bridge includes that access bridge encircles (2), encircles (2) near described access bridge
Described main arch (1) arch springing of side postponed than main arch (1) the arch springing burst time away from access bridge arch (2) side
350～650ms, described access bridge arch (2) prolonged than described main arch (1) the arch springing burst time of close access bridge arch (2) side
Slow 350～650ms.
Reinforced concrete arch bridge blasting demolishing method the most according to claim 1, it is characterised in that institute
State delay detonating detonator in big gun hole (4) hole of vault in step 3 (101), left arch springing (102), right arch springing (103)
One is msdelayed light emission Nonel detonator.
Reinforced concrete arch bridge blasting demolishing method the most according to claim 1 and 2, it is characterised in that
Big gun hole (4) the hole male extension detonator thunder of vault (101), left arch springing (102), right arch springing (103) in described step 3
Half second elementary errors Nonel detonator of Guan Erwei.
Reinforced concrete arch bridge blasting demolishing method the most according to claim 3, it is characterised in that institute
State the explosive initiation time delay 350～650ms in the upper big gun hole (4) of vault (101), described left arch springing (102), right arch springing (103)
It is 350～650ms with described vault (101) time difference detonating delay time.
Reinforced concrete arch bridge blasting demolishing method the most according to claim 1, it is characterised in that institute
State the left arch springing (102) of main arch in step 4 (1), right arch springing (103) uses straw mattress, gunnysack to carry out parcel protection,
Described vault (101) uses sandbag to carry out ballast protection.
Reinforced concrete arch bridge blasting demolishing method the most according to claim 1, it is characterised in that institute
State access bridge arch (2) both sides and built protection sand stalk and steel pipe protective frame by laying bricks or stones, described steel pipe protective frame is equipped with protection
Net.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585935.1A CN103898842B (en) | 2012-12-28 | 2012-12-28 | Reinforced concrete arch bridge blasting demolishing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585935.1A CN103898842B (en) | 2012-12-28 | 2012-12-28 | Reinforced concrete arch bridge blasting demolishing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103898842A CN103898842A (en) | 2014-07-02 |
| CN103898842B true CN103898842B (en) | 2016-10-19 |
Family
ID=50990397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210585935.1A Active CN103898842B (en) | 2012-12-28 | 2012-12-28 | Reinforced concrete arch bridge blasting demolishing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103898842B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215136B (en) * | 2014-09-01 | 2016-01-06 | 武汉宏伟交通爆破工程有限公司 | Reinforced beam demolition blasting blast hole projectile filling, blocking and pressure slag structure and demolition blasting method |
| 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 |
| CN104930936B (en) * | 2015-06-24 | 2016-05-04 | 中交一公局第五工程有限公司 | Highway arch form line bridge controlled blasting fast dismantling eliminating method |
| 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 |
| CN110470187A (en) * | 2019-09-12 | 2019-11-19 | 浙江省高能爆破工程有限公司 | A kind of blasting circuit suspension protective device and method |
| CN111364378B (en) * | 2020-03-12 | 2021-07-20 | 中铁大桥局武汉桥梁特种技术有限公司 | Method for dismantling double-arch bridge |
Citations (2)
| 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 |
| CN103362077A (en) * | 2013-07-29 | 2013-10-23 | 中铁二局股份有限公司 | Construction method for dismounting haplopore box type arch bridge by virtue of water pressure short hole and medium-length hole comprehensive decrepitation method |
-
2012
- 2012-12-28 CN CN201210585935.1A patent/CN103898842B/en active Active
Patent Citations (2)
| 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 |
| CN103362077A (en) * | 2013-07-29 | 2013-10-23 | 中铁二局股份有限公司 | Construction method for dismounting haplopore box type arch bridge by virtue of water pressure short hole and medium-length hole comprehensive decrepitation method |
Non-Patent Citations (4)
| Title |
|---|
| 复杂环境薄壁箱型拱肋双曲拱桥爆破拆除;周勇等;《中华建设》;20130328(第3期);第156-157页 * |
| 宜春大桥爆破拆除;谢先启等;《爆破》;20120331(第1期);第62-68页 * |
| 山区火电厂施工特点;杨臣武;《电力建设》;19830302(第2期);第33页 * |
| 控制爆破拆除钢筋混凝土双曲拱桥;王海峰;《爆破》;20040630(第2期);第66-67页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103898842A (en) | 2014-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103898842B (en) | Reinforced concrete arch bridge blasting demolishing method | |
| CN108661643B (en) | It a kind of coal working face end adopts return channel and cuts top release shield lane method | |
| CN108286920A (en) | A kind of implementation of Tunnel Blasting and excavation | |
| CN103277105B (en) | Strong rock burst tunnel micro seismic monitoring and stress relieving construction method | |
| CN105157493B (en) | A kind of explosion expansion tube and blasting method thereof | |
| CN101967888A (en) | Multidirectional multi-fold blasting method for high-rise building with frame-shear structure | |
| CN109339797A (en) | A kind of minimum clear-distance tunnel is appeared damping construction method | |
| CN103629980A (en) | Adjacent existing railway steep mountain loosen control blast construction method | |
| CN109029167A (en) | Foundation pit V-type Cut Blasting method | |
| CN104913696A (en) | Side slope excavation smooth-surface blasting-method construction method | |
| CN111411962A (en) | Coal mine rock burst treatment method | |
| CN107328328A (en) | The blasting method of steel construction | |
| CN113704861A (en) | Deep roadway energy-absorbing support design method and system | |
| CN103362077A (en) | Construction method for dismounting haplopore box type arch bridge by virtue of water pressure short hole and medium-length hole comprehensive decrepitation method | |
| CN104457466B (en) | A kind of blasting method of tunnel open excavation section | |
| CN107328322A (en) | Cable-stayed type truss bridge blasting method is held under one kind | |
| CN207351319U (en) | Subregion demolition blasting network apparatus when nonel tube plays blast hole extension | |
| CN112228079B (en) | Construction method for newly-built tunnel by crossing existing line at small angle | |
| CN103868425A (en) | High-rise shearing wall structure building directed and bi-directional folding exploding device and method | |
| CN111780633B (en) | Step-type rapid excavation method for IV-V-level surrounding rock lower step of double-track tunnel | |
| CN110332861B (en) | Blasting construction method for controlling urban subway complex environment | |
| CN112923821A (en) | Drilling and blasting tunneling method for reducing and fixing rock resistance | |
| CN108413822A (en) | To fan shaped medium length hole Shock reducing blasting method in one kind | |
| CN208075693U (en) | A kind of device for protecting the normal propagation of explosion of Nonel detonator | |
| CN107843160A (en) | A kind of initiation net of deep foundation pit reinforced concrete support beam demolition blasting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160303 Address after: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 16 Applicant after: CHINA RAILWAY NO.2 BUREAU ENGINEERING Co.,Ltd. Address before: 610041, No. nine, No. 156, building B, high building, Xing Xing Road, Chengdu hi tech Zone, Sichuan Applicant before: CHINA RAILWAY ERJU Co.,Ltd. Applicant before: CHINA RAILWAY ERJU THIRD ENGINEERING Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Patentee after: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. Address before: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Patentee before: CHINA RAILWAY NO.2 BUREAU ENGINEERING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181218 Address after: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Co-patentee after: CHINA RAILWAY ERJU THIRD ENGINEERING Co.,Ltd. Patentee after: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. Address before: No. 16, Jinniu District Road, Jinniu District Road, Chengdu, Sichuan Patentee before: CHINA RAILWAY NO.2 ENGINEERING GROUP Co.,Ltd. |
|
| TR01 | Transfer of patent right |