CN102494571A - Construction method for damped blasting of tunnels - Google Patents
Construction method for damped blasting of tunnels Download PDFInfo
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- CN102494571A CN102494571A CN2011104089129A CN201110408912A CN102494571A CN 102494571 A CN102494571 A CN 102494571A CN 2011104089129 A CN2011104089129 A CN 2011104089129A CN 201110408912 A CN201110408912 A CN 201110408912A CN 102494571 A CN102494571 A CN 102494571A
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Abstract
The invention relates to a construction method for damped blasting of tunnels. The construction method is characterized in that a working face comprises cutting eyes, auxiliary eyes and peripheral eyes; an air drill is adopted for forming holes in sequence; the working face is divided into a left half-range face and a right half-range face for respectively distributing the segment positions of detonators, wherein the left half-range face adopts even segment positions, the right half-range face adopts odd segment positions; the auxiliary eyes and the peripheral eyes are respectively connected into a group according to 3-5 blastholes in one row; and detonators with same segment positions in different groups can be used repeatedly, and then all the groups are connected in sequence and in series by adopting two segments of detonators, so that the fine differences inside and outside the holes of the detonating tubes are combined together. According to the construction method, the damped blasting measure for combining the fine differences inside and outside the holes are adopted, the detonating tubes with fine differences are connected in parallel and in series for combined use, the detonators with same segment positions in different groups are allowed to be used repeatedly, and the blasting time of the detonators with same segment positions in different groups is staggered through serial two segments of detonators, so that the explosive amount for simultaneous blasting is reduced and the blasting vibration speed is effectively reduced.
Description
Technical field
The present invention relates to the damping blasting construction method in tunnel, be particularly useful for the subway project dug underground in bustling location, city, and situation constructions such as building and pile foundation are closely worn in the tunnel down.
Background technology
Subway engineering is built in bustling location in the city, the tunnel occurs through regular meeting and closely wears situation such as large-scale structures or bridge pile foundation plinth down.When adopting the blasting method excavation, blasting vibration may cause a devastating effect to building or pile foundation; If adopt shield machine construction, construction costs will significantly increase, and according to the national conditions of present China, also be difficult to popularize in an all-round way.
Tunnel Blasting construction at present is main adopts non-electricity millisecond elementary errors Nonel detonator, totally 20 sections, and top bar 50～60 big gun holes arranged approximately in the tunnel.
calculates according to Sa road Paderewski formula, and single hop detonator battering charge is 0.36kg.Adopt traditional on line mode can't satisfy this requirement, the single hop battering charge can exceed this permissible value, causes explosion vibration velocity to exceed standard.Therefore, under existing technical equipment condition, can significantly not increase on the basis of construction costs, be necessary conventional blasting method is optimized, propose a kind of new damping blasting construction method.
Summary of the invention
The present invention seeks on existing priming system specification basis; Solve the bottleneck problem of single hop detonator battering charge; A kind of construction method of tunnel shock-absorbing explosion is provided, solves the not enough and maximum too small contradiction of explosive payload that allows of single hop of detonator section, effectively reduce explosion vibration velocity.
The present invention for realizing the technical scheme that above-mentioned purpose adopted is: a kind of construction method of tunnel shock-absorbing explosion; It is characterized by: face divides snubber, reliever and periphery hole, adopts air drill pore-forming successively, and face branch left and right sides half range carries out detonator respectively and arranges; Left side half range adopts the even number section; Right half range adopts the odd number section, and reliever, periphery hole become one group by 3～5 parallel hole connections of every row respectively, and not interior on the same group detonator section can be reused; Adopt 2 sections detonators to connect successively each group then; Elementary errors outside elementary errors and the hole in the hole of detonator is combined, thereby each burst time of organizing identical section detonator is staggered, reduced the explosive charge that detonates simultaneously.
Said snubber dynamite quantity per hole is greater than reliever and periphery hole big gun hole dynamite quantity per hole.
Said snubber adopts four hole V-cut modes, and four big gun holes are adopted 1,2,3,4 section respectively.
Said reliever is since 5 sections or 6 sections, and reliever is connected with snubber through 2 sections detonators.
Concentrated charge at the bottom of the said snubber employing hole; Reliever and periphery hole adopt at interval not coupling charging, and primacord connects.
The damping explosion measure that the present invention has adopted the inside and outside elementary errors in hole to combine; The parallel connection and serial connection of elementary errors detonator is used in combination, not allowing the detonator of identical section to reuse on the same group, through 2 sections detonators of series connection; With not on the same group in burst time of identical section detonator stagger; Thereby efficiently solve the contradiction that the big gun hole is many and the detonator section is not enough of once detonation, reduced the explosive charge that detonates simultaneously, according to the burst time curve statistics in each hole; Basically realize a hole one sound, effectively reduced explosion vibration velocity.
In addition because snubber need provide free face for follow-up explosion; Dynamite quantity per hole is larger than other big gun holes, adopts four hole V-cut modes, and four big gun holes are adopted 1,2,3,4 section respectively; Reliever is since 5 sections or 6 sections; After snubber detonated, recur quick-fried reliever and periphery hole were avoided vibration velocity stack in the snubber initiation process.
Description of drawings
Fig. 1 is the tunnel of the present invention on line method network of topping bar.
Fig. 2 is the tunnel of the present invention on line method network of getting out of a predicament or an embarrassing situation.
Fig. 3 is the tunnel of the present invention snubber initiation net figure that tops bar.
The specific embodiment
Below in conjunction with specific embodiment the present invention is done further explain, but the present invention is not limited to specific embodiment.
Wear the underground large-scale shopping gallery in a place under one running tunnel, gallery is a reinforced concrete frame structure, B1, pile foundation under the raft plate.The tunnel vault apart from stake at the bottom of 4.0m only, apart from only about 8m at the bottom of the raft plate.The construction method of the damping explosion that it is concrete is following:
Adopt YT-28 type air drill pore-forming, two typhoons bore and carry out simultaneously, and drilling depth is snubber 1.2m, reliever and periphery hole 1.0m;
Snubber adopts four hole V-cuts, aperture spacing 1.8m, and spacing 0.5m at the bottom of the hole need control angle well during boring, and angle is excessive or too smallly all can influence the slotting effect;
Carry out powder charge in order.Snubber dynamite quantity per hole 400g, concentrated charge at the bottom of the hole, four holes are adopted 1,2,3,4 section respectively.The left half range of topping bar adopts the even number section, since 6 sections, and 6,8,10 sections Right half range adopts the odd number section, since 5 sections, and 5,7,9 sections 3～5 holes are one group, reliever single hole powder charge 300g, periphery hole single hole powder charge 200g.Reliever and periphery hole adopt at interval not coupling charging, and primacord connects.Powder charge is carried out on line by the order of periphery hole → reliever → snubber after accomplishing, and adopts 2 sections detonator A series connection (like Fig. 1) between each group;
Each big gun hole adopts the stemming shutoff tight, prevents gas leakage, to such an extent as to influence demolition effect;
Above-mentioned work is accomplished, and after check is confirmed, connects initiator and ignites.
This damping blasting construction method, the on line mode through elementary errors inside and outside the employing hole combines effectively staggers the burst time in each big gun hole, has reduced the explosive charge that detonates simultaneously.Show that through explosion vibration velocity monitor explosion vibration velocity can be controlled in below the 0.8cm/s, guaranteed the stable and construction safety of building.
Claims (5)
1. the construction method of a tunnel shock-absorbing explosion; It is characterized by: face divides snubber, reliever and periphery hole, adopts air drill pore-forming successively, and face branch left and right sides half range carries out detonator respectively and arranges; Left side half range adopts the even number section; Right half range adopts the odd number section, and reliever, periphery hole become one group by 3～5 parallel hole connections of every row respectively, and not interior on the same group detonator section can be reused; Adopt 2 sections detonators to connect successively each group then, thereby elementary errors outside elementary errors and the hole in the hole of detonator is combined.
2. the construction method of a kind of tunnel shock-absorbing explosion according to claim 1 is characterized by: said snubber dynamite quantity per hole is greater than reliever and periphery hole big gun hole dynamite quantity per hole.
3. the construction method of a kind of tunnel shock-absorbing explosion according to claim 1 is characterized by: said snubber adopts four hole V-cut modes, and four big gun holes are adopted 1,2,3,4 section respectively.
4. the construction method of a kind of tunnel shock-absorbing explosion according to claim 3 is characterized by: said reliever is since 5 sections or 6 sections, and reliever is connected with snubber through 2 sections detonators.
5. according to the construction method of the arbitrary described a kind of tunnel shock-absorbing explosion of claim 1-4, it is characterized by: concentrated charge at the bottom of the said snubber employing hole; Reliever and periphery hole adopt at interval not coupling charging, and primacord connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011104089129A CN102494571A (en) | 2011-12-11 | 2011-12-11 | Construction method for damped blasting of tunnels |
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| CN2011104089129A CN102494571A (en) | 2011-12-11 | 2011-12-11 | Construction method for damped blasting of tunnels |
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| CN102494571A true CN102494571A (en) | 2012-06-13 |
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| CN2011104089129A Pending CN102494571A (en) | 2011-12-11 | 2011-12-11 | Construction method for damped blasting of tunnels |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175451A (en) * | 2013-03-13 | 2013-06-26 | 中国建筑土木建设有限公司 | Construction method of tunnel shock relieve hole controlling blasting |
| CN104266557A (en) * | 2014-07-31 | 2015-01-07 | 山东华联矿业股份有限公司 | Precontrol roof sublevel ore breaking once shaft forming method |
| CN104482816A (en) * | 2014-12-03 | 2015-04-01 | 中国矿业大学(北京) | Gradient pre-splitting blasting method and device of lancing cartridges around vertical shaft |
| CN104596373A (en) * | 2015-01-05 | 2015-05-06 | 山西路桥集团长临高速公路有限公司 | Excitation needle detonation construction method for mountain tunnel |
| CN104634199A (en) * | 2015-02-10 | 2015-05-20 | 四川公路桥梁建设集团有限公司 | Method for implementing tunnel periphery hole smooth blasting by means of detonating cord and nonel detonator |
| CN104895574A (en) * | 2015-05-06 | 2015-09-09 | 重庆工程职业技术学院 | Construction method for controlling large cross section tunnel blasting vibration velocity |
| CN105043176A (en) * | 2015-07-08 | 2015-11-11 | 中交路桥南方工程有限公司 | Multi-level small-wedge-shaped cuthole blasting vibration reduction method |
| CN109341450A (en) * | 2018-10-30 | 2019-02-15 | 中电建南方建设投资有限公司 | A kind of Tunnel Blasting structure and Tunnel Blasting construction method |
| CN109341451A (en) * | 2018-11-09 | 2019-02-15 | 中铁二十二局集团轨道工程有限公司 | A kind of damped blasting of tunnels structure and construction |
| CN110455137A (en) * | 2019-07-16 | 2019-11-15 | 中铁隧道集团二处有限公司 | Elementary errors is networked construction method outside a kind of hole for bored tunnel buffer blasting |
| CN110595305A (en) * | 2019-08-08 | 2019-12-20 | 中铁二局第二工程有限公司 | Wave crest uncorrelated detonation method |
| CN111780634A (en) * | 2020-07-20 | 2020-10-16 | 中国铁建投资集团有限公司 | Method for reducing blasting vibration velocity |
| CN113153357A (en) * | 2021-04-29 | 2021-07-23 | 重庆大学 | Tunnel inverted arch half-width dismantling device and construction method |
| CN114791246A (en) * | 2022-04-02 | 2022-07-26 | 中铁十六局集团路桥工程有限公司 | Blasting construction method for existing small-clear-distance close-connection tunnel |
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| CN201764913U (en) * | 2010-08-30 | 2011-03-16 | 中铁十九局集团有限公司 | Repetitive type wedge-shaped cut |
| CN102230768A (en) * | 2011-06-08 | 2011-11-02 | 中煤第七十一工程处 | High-efficiency inclined shaft tunneling blasting method for red clay |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175451A (en) * | 2013-03-13 | 2013-06-26 | 中国建筑土木建设有限公司 | Construction method of tunnel shock relieve hole controlling blasting |
| CN103175451B (en) * | 2013-03-13 | 2015-08-05 | 中国建筑土木建设有限公司 | A kind of construction method of tunnel shock-absorbing hole controlled blasting |
| CN104266557A (en) * | 2014-07-31 | 2015-01-07 | 山东华联矿业股份有限公司 | Precontrol roof sublevel ore breaking once shaft forming method |
| CN104482816A (en) * | 2014-12-03 | 2015-04-01 | 中国矿业大学(北京) | Gradient pre-splitting blasting method and device of lancing cartridges around vertical shaft |
| CN104596373A (en) * | 2015-01-05 | 2015-05-06 | 山西路桥集团长临高速公路有限公司 | Excitation needle detonation construction method for mountain tunnel |
| CN104634199A (en) * | 2015-02-10 | 2015-05-20 | 四川公路桥梁建设集团有限公司 | Method for implementing tunnel periphery hole smooth blasting by means of detonating cord and nonel detonator |
| CN104634199B (en) * | 2015-02-10 | 2016-05-25 | 四川公路桥梁建设集团有限公司 | Utilize primacord and Nonel detonator to realize the method for tunnel perimeter eye photoface exploision |
| CN104895574A (en) * | 2015-05-06 | 2015-09-09 | 重庆工程职业技术学院 | Construction method for controlling large cross section tunnel blasting vibration velocity |
| CN105043176A (en) * | 2015-07-08 | 2015-11-11 | 中交路桥南方工程有限公司 | Multi-level small-wedge-shaped cuthole blasting vibration reduction method |
| CN105043176B (en) * | 2015-07-08 | 2018-07-10 | 中交路桥南方工程有限公司 | A kind of small wedge shot shock-dampening method of multistage |
| CN109341450A (en) * | 2018-10-30 | 2019-02-15 | 中电建南方建设投资有限公司 | A kind of Tunnel Blasting structure and Tunnel Blasting construction method |
| CN109341450B (en) * | 2018-10-30 | 2022-06-21 | 中电建南方建设投资有限公司 | Tunnel blasting structure and tunnel blasting construction method |
| CN109341451A (en) * | 2018-11-09 | 2019-02-15 | 中铁二十二局集团轨道工程有限公司 | A kind of damped blasting of tunnels structure and construction |
| CN110455137A (en) * | 2019-07-16 | 2019-11-15 | 中铁隧道集团二处有限公司 | Elementary errors is networked construction method outside a kind of hole for bored tunnel buffer blasting |
| CN110455137B (en) * | 2019-07-16 | 2022-05-24 | 中铁隧道集团二处有限公司 | Extrahole differential networking construction method for vibration reduction blasting of underground excavation tunnel |
| CN110595305A (en) * | 2019-08-08 | 2019-12-20 | 中铁二局第二工程有限公司 | Wave crest uncorrelated detonation method |
| CN110595305B (en) * | 2019-08-08 | 2021-07-30 | 中铁二局第二工程有限公司 | Wave crest uncorrelated detonation method |
| CN111780634A (en) * | 2020-07-20 | 2020-10-16 | 中国铁建投资集团有限公司 | Method for reducing blasting vibration velocity |
| CN113153357A (en) * | 2021-04-29 | 2021-07-23 | 重庆大学 | Tunnel inverted arch half-width dismantling device and construction method |
| CN114791246A (en) * | 2022-04-02 | 2022-07-26 | 中铁十六局集团路桥工程有限公司 | Blasting construction method for existing small-clear-distance close-connection tunnel |
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Owner name: CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION CO. Effective date: 20130306 |
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Effective date of registration: 20130306 Address after: 116000. 235 and 237 Gorky Road, Shahekou District, Liaoning, Dalian Applicant after: Dalian Branch China Construction Eineering Division Corp. Ltd. Applicant after: China Construction Eighth Engineering Division Co., Ltd. Address before: 116000. 235 and 237 Gorky Road, Shahekou District, Liaoning, Dalian Applicant before: Dalian Branch China Construction Eineering Division Corp. Ltd. |
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Application publication date: 20120613 |