CN101793487A - Controlled blasting technique for small-clear-distance tunnel construction - Google Patents
Controlled blasting technique for small-clear-distance tunnel construction Download PDFInfo
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- CN101793487A CN101793487A CN 201010136157 CN201010136157A CN101793487A CN 101793487 A CN101793487 A CN 101793487A CN 201010136157 CN201010136157 CN 201010136157 CN 201010136157 A CN201010136157 A CN 201010136157A CN 101793487 A CN101793487 A CN 101793487A
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Abstract
The invention relates to a controlled blasting technique for small-clear-distance tunnel construction. The invention adopts a technical scheme comprising the following: step 1, determining that the safety standard of blasting vibration is 3 to 5 cm/s according to safety requirements of adjacent tunnels or buildings (structures); step 2, performing excavation shallow-hole multi-cycle micro-differential controlled blasting on a construction tunnel according to three steps, namely, to excavate a first step I in an excavation length of 5 to 10 meters by adopting shallow-hole micro-differential controlled blasting and then to successively excavate a second step II and a third step III in an excavation length of 5 to 10 meters by adopting shallow-hole micro-differential controlled blasting as well; and step 3, repeat the step 2 until all tunnel construction is finished. The technique has the characteristics of effectively protecting the stability of surrounding rock and the safety of adjacent tunnels or buildings (structures) and ensuring construction progress and construction safety.
Description
Technical field
The invention belongs to Geotechnical Engineering blasting technique field, relate in particular to a kind of controlled blasting technique for small-clear-distance tunnel construction.
Background technology
Along with the acceleration of Urbanization in China and the extensive expansion of traffic capital construction, many cities have begun the construction of new round subway engineering, civil air defense constructions and installations and urban light rail railway engineering; Simultaneously, a large amount of single-track tunnels need increase builds the tunnel, two wires, or the ew line tunnel need build up parallel two-wire, and these engineerings often need be constructed near existing buildings or structures inevitably, or pass through under some important face of land buildings or structures.In these engineering constructions, tunnel piercing blasting technique as a kind of main construction method, its blasting parameter choose with construction technology determine whether reasonable, not only directly have influence on blasting quality, constructing tunnel efficient and economic benefit of engineering, but also have influence on the effect and the safety of buildings or structures on every side of stable, the tunnel support of tunnel surrounding.How this influence being reduced to bottom line, is the key problem of constructing under proximity condition in the underground structure.
Compare with other blasting engineering, Tunnel Blasting is the bursting work that is in a kind of relative small space.At present, China mainly concentrates on the Cut Blasting technology to the research of tunnel piercing blasting technique, the periphery hole blasting technique, aspect (Fang Junbo such as driving blasting technique when no slotting driving blasting technique and tunnel pass through face of land building, Cui Tianlin. the interval blasting vibration of shallow embedding subway is to influence [J] tunnel, the world .2000 (5) of surface buildings: 28～31), (Zhu Zebing, Zhang Dongming. the control [J] of big level ground tunnel piercing concussion of blasting. engineering explosion .2002,8 (4): 65～70), (Dai Qinrong, Li Liangyun. interior elder brother's railway No. 1 tunnel control Technology of Blasting in Yanjin [J] tunnel, the world (supplementary issue) .2000:316～322), (Zhou Chunfeng. city shallow tunnel excavation damping controlled blasting technology [J]. engineering explosion .2001,7 (1): 57～61), though these technology have its advantage, but the situation that construction surface is crowded and part work post workmen constructs nowhere can occur, influence construction speed; The arrangement and method for construction very flexible, when country rock situation and execution conditions changed, former arrangement and method for construction was difficult to make timely, suitable adjustment; Especially can influence the stability of country rock and the safety of closing on tunnel or adjacent buildings or structures, also influence construction safety.
Summary of the invention
Task of the present invention provides a kind of stability of country rock and safety of closing on tunnel or adjacent buildings or structures can protected effectively, can guarantee the controlled blasting technique for small-clear-distance tunnel construction of construction speed and construction safety again.
For realizing above-mentioned task, the technical solution adopted in the present invention is: the first step, according to the safety requirements that closes on tunnel or adjacent buildings or structures, determine that safety criterion of blasting vibration is 3～5cm/s; Second step, construction tunnel is tunneled the controlled blasting of shallow many circulations of eye elementary errors by three steps, promptly at first the 1st step is implemented driving, Excavation Length is 5～10m, driving adopts the controlled blasting of shallow eye elementary errors, successively the 2nd step and the 3rd step are implemented driving again, Excavation Length is 5～10m, and driving also adopts the controlled blasting of shallow eye elementary errors; The 3rd step repeated for second step, all constructed until finishing the tunnel.
The controlled blasting parameter is:
Maximum single hop dose is 5～8kg;
The explosion cyclic advance is 0.8～1.5m;
Coupling parameter is not 2.0～2.5;
Spacing spacing E is (10～15) D, D---blasthole diameter, m;
Borehole proximity parameter m is 0.8～1.0;
Linear charging density ρ is 100～250g/m;
Charge constitution is a coupling charging not;
The slotting form is V-cut.
Owing to adopt technique scheme, one of main feature of the present invention be to construction tunnel by the three steps driving that circulates more, for each different work post that circulate provides enough working faces, make each work post construction be connected more compact, improve efficiency of construction, accelerating construction progress 40%～55%; Another characteristics of the present invention are the controlled blasting of shallow eye elementary errors, and the selection of blasting parameter is dynamically adjusted according to real-time Monitoring Data, in the zone with higher-security, can suitably strengthen single hop dose and single cycle drilling depth; When the distance protected object was nearer, the strictness control by to blasting parameter such as hole depth, maximum single hop dose and explosion cyclic advance can guarantee its security.Use this method explosion, blast hole utilizing factor improves greatly, can protect the stability of country rock effectively, guarantees the safety and the construction speed of constructing; By the practical engineering application contrast, blast hole utilizing factor reaches more than 90%, and the horizontal blasting vibration had descended 36.8%～43.5% than originally, and the veritcal shooting vibration had descended 29.1%～40.8% than originally.
Therefore, the present invention has the stability that can protect country rock effectively and the safety of closing on tunnel or adjacent buildings or structures, can guarantee the characteristics of construction speed and construction safety again.
Description of drawings
Fig. 1 is a kind of three steps driving of the present invention schematic diagram.
The specific embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments, is not the restriction to protection domain:
Embodiment 1
A kind of controlled blasting technique for small-clear-distance tunnel construction.The minimum distance at two centers in this construction tunnel and existing tunnel is 8～15m.The controlled blasting technology that present embodiment is taked is: the first step, according to the safety requirements that closes on the tunnel, determine that safety criterion of blasting vibration is 3～5cm/s; Second step, construction tunnel is tunneled the controlled blasting of shallow many circulations of eye elementary errors by three steps, as shown in Figure 1, be that upper step I implements driving at first to the 1st step, Excavation Length is 5～10m, and driving adopts the controlled blasting of shallow eye elementary errors, successively the 2nd the step II and the 3rd step III of bottom is implemented driving again, Excavation Length is 5～10m, and driving also adopts the controlled blasting of shallow eye elementary errors; The 3rd step repeated for second step, all constructed until finishing the tunnel.
The controlled blasting parameter is:
Maximum single hop dose is 5～5.5kg;
The explosion cyclic advance is 0.8～0.9m;
Spacing E is (10～15) D, D---blasthole diameter, m;
Borehole proximity parameter m is 0.8～1.0;
Linear charging density ρ is 100～250g/m;
Charge constitution is a coupling charging not;
Coupling parameter is not 2.0～2.5;
The slotting form is V-cut.
Embodiment 2
A kind of controlled blasting technique for small-clear-distance tunnel construction.The minimum distance at two centers in this construction tunnel and existing tunnel is 15～25m.
The controlled blasting parameter is:
Maximum single hop dose is 5～6kg;
The explosion cyclic advance is 0.9～1m;
Spacing E is (10～15) D.
All the other are with embodiment 1.
Embodiment 3
A kind of controlled blasting technique for small-clear-distance tunnel construction.The minimum distance at two centers in this construction tunnel and existing tunnel is 25～35m.
The controlled blasting parameter is:
Maximum single hop dose is 5.5～7kg;
The explosion cyclic advance is 1.0～1.2m;
Spacing E is (15～20) D.
All the other are with embodiment 1.
Embodiment 4
A kind of controlled blasting technique for small-clear-distance tunnel construction.The minimum distance at two centers in this construction tunnel and existing tunnel is 35～75m.
The controlled blasting parameter is:
Maximum single hop dose is 7～8kg;
The explosion cyclic advance is 1.2～1.5m;
Spacing E is (15～20) D.
All the other are with embodiment 1.
This specific embodiment by the three steps driving that circulates, for each different work post that circulate provides enough working faces, makes each work post construction be connected more compact, raising efficiency of construction, accelerating construction progress 40%～55% to construction tunnel more; Adopt the controlled blasting of shallow eye elementary errors simultaneously, blasting parameter is selected dynamically to adjust according to real-time Monitoring Data, in the zone with higher-security, can suitably strengthen single hop dose and single cycle drilling depth; When the distance protected object is nearer, by strictness control, to guarantee its security to blasting parameters such as hole depth, maximum single hop dose and explosion cyclic advances.Use this method explosion, blast hole utilizing factor improves greatly, can protect the stability of country rock effectively, guarantees the safety and the construction speed of constructing; By the practical engineering application contrast, blast hole utilizing factor reaches more than 90%, and the horizontal blasting vibration had descended 36.8%～43.5% than originally, and the veritcal shooting vibration had descended 29.1%～40.8% than originally.
Therefore, this specific embodiment has the stability that can protect country rock effectively and the safety of closing on tunnel or adjacent buildings or structures, can guarantee the characteristics of construction speed and construction safety again.
Claims (2)
1. controlled blasting technique for small-clear-distance tunnel construction is characterized in that this controlled blasting technology is: the first step, according to the safety requirements that closes on tunnel or adjacent buildings, determine that safety criterion of blasting vibration is 3～5cm/s; Second step, construction tunnel is tunneled the controlled blasting of shallow many circulations of eye elementary errors by three steps, promptly at first the 1st step is implemented driving, Excavation Length is 5～10m, driving adopts the controlled blasting of shallow eye elementary errors, successively the 2nd step and the 3rd step are implemented driving again, Excavation Length is 5～10m, and driving also adopts the controlled blasting of shallow eye elementary errors; The 3rd step repeated for second step, all constructed until finishing the tunnel.
2. controlled blasting technique for small-clear-distance tunnel construction according to claim 1 is characterized in that described controlled blasting parameter is:
Maximum single hop dose is 5～8kg;
The explosion cyclic advance is 0.8～1.5m;
Coupling parameter is not 2.0～2.5;
Spacing E is (10～15) D, D---blasthole diameter, m;
Borehole proximity parameter m is 0.8～1.0;
Linear charging density ρ is 100～250g/m;
Charge constitution is a coupling charging not;
The slotting form is V-cut.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123247A (en) * | 2013-01-07 | 2013-05-29 | 重庆建工集团股份有限公司 | Damping blasting method for steep dip small crossing angle layered surrounding rock small-distance tunnel excavation |
| CN103344154A (en) * | 2013-07-05 | 2013-10-09 | 武汉科技大学 | Carbonaceous schist tunnel blasting method and construction method |
| CN104196537A (en) * | 2014-08-26 | 2014-12-10 | 广东省建筑工程机械施工有限公司 | Construction method of three parallel metro tunnels with ultra-small clear distance |
| CN104457466A (en) * | 2014-12-08 | 2015-03-25 | 上海市政工程设计研究总院（集团）有限公司 | Explosion method of open-cut tunnel segment |
| CN105865281A (en) * | 2016-04-27 | 2016-08-17 | 杨毅 | Method for transverse open excavation controlled blasting construction adjacent to power station and booster station |
| CN106021937A (en) * | 2016-05-24 | 2016-10-12 | 北京科技大学 | Calculation method for tunnel blasting explosive quantities under different vibration velocities for building structures |
| CN106288987A (en) * | 2016-08-23 | 2017-01-04 | 中国铁建大桥工程局集团有限公司 | A kind of small interval top-bottom cross constructing tunnel engineering method |
| CN107191189A (en) * | 2017-06-09 | 2017-09-22 | 中铁建大桥工程局集团第五工程有限公司 | Extra small clear-distance tunnel controlled blasting construction method |
| CN114963907A (en) * | 2022-06-30 | 2022-08-30 | 北京住总集团有限责任公司 | Rock tunnel blasting excavation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6431075B2 (en) * | 1999-12-31 | 2002-08-13 | Dong Soo Shim | Center-cut method for tunnel excavation utilizing large unloaded blast holes and a circular pre-split |
| CN101144384A (en) * | 2007-11-01 | 2008-03-19 | 中铁二局股份有限公司 | Tunnel engineering non-blasting weak disturbance excavating method |
| KR20090008810A (en) * | 2007-07-19 | 2009-01-22 | 두준기 | Blasting method of loading non-electric ms detonator and connecting with detonating fuse in contour holes |
| CN100543269C (en) * | 2006-06-23 | 2009-09-23 | 董淑练 | The excavation method of constructing tunnel |
-
2010
- 2010-03-30 CN CN 201010136157 patent/CN101793487A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6431075B2 (en) * | 1999-12-31 | 2002-08-13 | Dong Soo Shim | Center-cut method for tunnel excavation utilizing large unloaded blast holes and a circular pre-split |
| CN100543269C (en) * | 2006-06-23 | 2009-09-23 | 董淑练 | The excavation method of constructing tunnel |
| KR20090008810A (en) * | 2007-07-19 | 2009-01-22 | 두준기 | Blasting method of loading non-electric ms detonator and connecting with detonating fuse in contour holes |
| CN101144384A (en) * | 2007-11-01 | 2008-03-19 | 中铁二局股份有限公司 | Tunnel engineering non-blasting weak disturbance excavating method |
Non-Patent Citations (1)
| Title |
|---|
| 《中国优秀硕士学位论文全文数据库工程科技Ⅱ》 20080815 戴向胜 长距离小净距隧道爆破开挖振动标准的研究 第7-14，17，19，37-38页 1-2 第卷, 第8期 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123247A (en) * | 2013-01-07 | 2013-05-29 | 重庆建工集团股份有限公司 | Damping blasting method for steep dip small crossing angle layered surrounding rock small-distance tunnel excavation |
| CN103344154B (en) * | 2013-07-05 | 2015-04-08 | 武汉科技大学 | Carbonaceous schist tunnel blasting method and construction method |
| CN103344154A (en) * | 2013-07-05 | 2013-10-09 | 武汉科技大学 | Carbonaceous schist tunnel blasting method and construction method |
| CN104196537A (en) * | 2014-08-26 | 2014-12-10 | 广东省建筑工程机械施工有限公司 | Construction method of three parallel metro tunnels with ultra-small clear distance |
| CN104457466B (en) * | 2014-12-08 | 2018-06-15 | 上海市政工程设计研究总院（集团）有限公司 | A kind of blasting method of tunnel open excavation section |
| CN104457466A (en) * | 2014-12-08 | 2015-03-25 | 上海市政工程设计研究总院（集团）有限公司 | Explosion method of open-cut tunnel segment |
| CN105865281A (en) * | 2016-04-27 | 2016-08-17 | 杨毅 | Method for transverse open excavation controlled blasting construction adjacent to power station and booster station |
| CN106021937A (en) * | 2016-05-24 | 2016-10-12 | 北京科技大学 | Calculation method for tunnel blasting explosive quantities under different vibration velocities for building structures |
| CN106021937B (en) * | 2016-05-24 | 2018-12-18 | 重庆巨能建设(集团)有限公司 | It is a kind of for construction of structures difference vibration velocity require under Tunnel Blasting medicine calculation method |
| CN106288987A (en) * | 2016-08-23 | 2017-01-04 | 中国铁建大桥工程局集团有限公司 | A kind of small interval top-bottom cross constructing tunnel engineering method |
| CN107191189A (en) * | 2017-06-09 | 2017-09-22 | 中铁建大桥工程局集团第五工程有限公司 | Extra small clear-distance tunnel controlled blasting construction method |
| CN114963907A (en) * | 2022-06-30 | 2022-08-30 | 北京住总集团有限责任公司 | Rock tunnel blasting excavation method |
| CN114963907B (en) * | 2022-06-30 | 2024-03-15 | 北京住总集团有限责任公司 | Rock tunnel blasting excavation method |
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Application publication date: 20100804 |