CN104895574A - Construction method for controlling large cross section tunnel blasting vibration velocity - Google Patents
Construction method for controlling large cross section tunnel blasting vibration velocity Download PDFInfo
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- CN104895574A CN104895574A CN201510226242.7A CN201510226242A CN104895574A CN 104895574 A CN104895574 A CN 104895574A CN 201510226242 A CN201510226242 A CN 201510226242A CN 104895574 A CN104895574 A CN 104895574A
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- blasting
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Abstract
The invention provides a construction method for controlling large cross section tunnel blasting vibration velocity, which comprises the steps: blasting vibration speed upper limit of construction segment blasting to surrounding rocks is determined, the distance of footage driving cycle is determined, emulsion explosive and non-electricity millisecond detonators which are arranged between two adjacent two segments and are bigger than 50ms in blasting gaps are selected, slanting wedge breaking-in holes are adopted, auxiliary holes, bottom plate holes and periphery holes are excavated, the periphery holes adopt cartridges which alternately charge emulsion explosive in a non-coupling mode, the cartridges are connected on bamboo chips in series through a explosive line, a cartridge frame is kept in overhead and is arranged in the middle of the periphery holes, the blasting sequence from the breaking-in holes to the auxiliary holes is determined, and then is to the bottom plate holes and then to the periphery holes. Explosive quantity upper limit of explosives which are allowed to emulsify on single segments is determined according to the blasting vibration speed upper limit, the blasting sequence, blasting equipment parameters, circular penetration distance, geological conditions and the distances from blasting points to measuring points. The construction method for controlling large cross section tunnel blasting vibration velocity adopts microseismic controlled blasting technology, increases interval time between the segments, achieves the purpose of controlling blasting vibration velocity, and reduces influence to tunnels.
Description
Technical field
The present invention relates to constructing tunnel field, particularly the construction method of a kind of heavy in section tunnel control Explosive Vibrating Velocity.
Background technology
In recent years, along with the fast development of highway in China and railway construction, big cross section longspan tunnel continues to bring out.In the tunneling of heavy in section, how to select correct construction method, to ensure that Security Construction and the economic benefit of engineering are very important problems.During the Tunnel Blasting construction of heavy in section, the Explosive Vibrating Velocity of generation may cause rock mass in existing tunnel to collapse, thus blast working progress is not easily grasped, and progress is too fast easily causes danger again; Tunnel, heavy in section because of span-depth radio large, easily result in again the bad stability of country rock and lining cutting.
Summary of the invention
The present invention is intended at least solve one of problems of the prior art.
The technical problem to be solved in the present invention is the problem solving heavy in section constructing tunnel controlled blasting vibration velocity.
For solving the problems of the technologies described above, the invention provides the construction method of a kind of heavy in section tunnel control Explosive Vibrating Velocity, the step of the method comprises:
S1: determine the Explosive Vibrating Velocity upper limit of construction section explosion to around country rock;
S2: the distance determining cyclic advance, controls within 1.0 ~ 1.5m;
S3: select explosive, comprises the non-electric ms detonator selecting emulsion and adjacent two intersegmental explosion gaps to be greater than 50ms;
S4: in fire point, adopts strabismus Wedge-shaped cut eye, and takes reliever, base plate eye, periphery hole;
S5: described snubber, reliever and base plate eye adopt continuous charging, and described periphery hole adopts not coupling interval to fill the powder stick of described emulsion, is connected on bamboo chip by described powder stick primacord, keeps described powder stick to make somebody a mere figurehead and is centered in described periphery hole;
S6: determine that firing order is by described snubber to described reliever, then to described base plate eye, then to described periphery hole;
S7: the dose upper limit allowing described emulsion according to the described Explosive Vibrating Velocity upper limit, described firing order, explosive parameter, described cyclic advance distance, geological condition and blow-up point to the distance determination single hop of survey mark;
S8: select central drift method excavation, start explosion middle drift.
Further, described step S1 comprises:
S101: utilize multi-wave and multi-component reflection shooting method to obtain the described geological condition of described construction section;
S102: carry out explosion bulge test according to described geological condition in influence basin front and determine the described Explosive Vibrating Velocity upper limit.
Further, the step of the method also comprises:
S9: after explosion, removes ballast beyond described middle drift, tunneling peripheral part;
S10: after excavation is slagged tap, with per-fore pouring liquid with small pipe reinforce adjoining rock, preliminary bracing adopts totally-enclosed i iron, and secondary lining adopts the thick steel concrete of 50cm, makes the country rock in described construction section tunnel, preliminary bracing, secondary lining form a totally-enclosed firm tubular composite construction;
S11: continue explosion, return step S8.
Further, adopt Sa Shi formula determination single hop to allow the dose upper limit of described emulsion in described step S7, described Sa Shi formula is as follows:
V＝KˊK(Q
1/3/R)
α
In formula, V is the described Explosive Vibrating Velocity upper limit, and K ˊ is correction factor, and Q is the dose upper limit that single hop allows described emulsion, R is the distance of blow-up point to survey mark, and K, α are the coefficient relevant with blow-up point landform, geological conditions in geological condition and damped expoential.
Beneficial effect of the present invention there are provided the construction method of a kind of heavy in section tunnel control Explosive Vibrating Velocity, present invention employs microseism Controlled blasting technique, add intersegmental interval time, to weaken the superposition of single blasting impact and explosion wave peak value, thus reach controlled blasting vibration velocity, reduce the impact on existing tunnel.
Accompanying drawing explanation
Figure 1 shows that the flow chart of the construction method of a kind of heavy in section of embodiment of the present invention tunnel control Explosive Vibrating Velocity.
Figure 2 shows that the flow chart of step S1 in Fig. 1.
Detailed description of the invention
Hereafter will describe the present invention in detail in conjunction with specific embodiments.It should be noted that the combination of technical characteristic or the technical characteristic described in following embodiment should not be considered to isolated, they can mutually be combined thus be reached better technique effect.
Figure 1 shows that the flow chart of the construction method of a kind of heavy in section of embodiment of the present invention tunnel control Explosive Vibrating Velocity.
As shown in Figure 1, embodiments provide the construction method of a kind of heavy in section tunnel control Explosive Vibrating Velocity, the step of the method comprises:
S1: determine the Explosive Vibrating Velocity upper limit of construction section explosion to around country rock;
S2: the distance determining cyclic advance;
S3: select explosive, comprises the non-electric ms detonator selecting emulsion and adjacent two intersegmental explosion gaps to be greater than 50ms;
S4: in fire point, adopts strabismus Wedge-shaped cut eye, and takes reliever, base plate eye, periphery hole;
S5: described snubber, reliever and base plate eye adopt continuous charging, and described periphery hole adopts not coupling interval to fill the powder stick of described emulsion, is connected on bamboo chip by described powder stick primacord, keeps described powder stick to make somebody a mere figurehead and is centered in described periphery hole;
S6: determine that firing order is by described snubber to described reliever, then to described base plate eye, then to described periphery hole;
S7: the dose upper limit allowing described emulsion according to the described Explosive Vibrating Velocity upper limit, described firing order, explosive parameter, described cyclic advance distance, geological condition and blow-up point to the distance determination single hop of survey mark;
S8: select central drift method excavation, start explosion middle drift.
Figure 2 shows that the flow chart of step S1 in Fig. 1.
As shown in Figure 2, described step S1 comprises:
S101: utilize multi-wave and multi-component reflection shooting method to obtain the described geological condition of described construction section;
S102: carry out explosion bulge test according to described geological condition in influence basin front and determine the described Explosive Vibrating Velocity upper limit.
In the present embodiment, the step of the method also comprises:
S9: after explosion, removes ballast beyond described middle drift, tunneling peripheral part;
S10: after excavation is slagged tap, with per-fore pouring liquid with small pipe reinforce adjoining rock, preliminary bracing adopts totally-enclosed i iron, and secondary lining adopts the thick steel concrete of 50cm, makes the country rock in described construction section tunnel, preliminary bracing, secondary lining form a totally-enclosed firm tubular composite construction;
S11: continue explosion, return step S8.
In the present embodiment, adopt Sa Shi formula determination single hop to allow the dose upper limit of described emulsion in described step S7, described Sa Shi formula is as follows:
V＝KˊK(Q
1/3/R)
α
In formula, V is the described Explosive Vibrating Velocity upper limit, K ˊ is correction factor (K ˊ=0.25 ~ 1.0), Q is the dose upper limit that single hop allows described emulsion, R is the distance of blow-up point to survey mark, K, α are the coefficient relevant with blow-up point landform, geological conditions in geological condition and damped expoential, and choosing of K, α value is as shown in table 1.
Choosing of table 1 K, α value
| Design feature and blasting method | K | α | Index of correlation |
| Basis explosion | 116.4 | 1.74 | 0.99 |
| Tier building demolition blasting | 32.1 | 1.54 | 0.98 |
| Hydraulic pressure demolition | 91.5 | 1.48 | 0.96 |
The invention provides the construction method of a kind of heavy in section tunnel control Explosive Vibrating Velocity, present invention employs microseism Controlled blasting technique, add intersegmental interval time, to weaken the superposition of single blasting impact and explosion wave peak value, thus reach controlled blasting vibration velocity, reduce the impact on existing tunnel.
Although give some embodiments of the present invention, it will be understood by those of skill in the art that without departing from the spirit of the invention herein, can change embodiment herein.Above-described embodiment is exemplary, should using embodiment herein as the restriction of interest field of the present invention.
Claims (4)
1. a construction method for heavy in section tunnel control Explosive Vibrating Velocity, is characterized in that, the step of the method comprises:
S1: determine the Explosive Vibrating Velocity upper limit of construction section explosion to around country rock;
S2: the distance determining cyclic advance, controls within 1.0 ~ 1.5m;
S3: select explosive, comprises the non-electric ms detonator selecting emulsion and adjacent two intersegmental explosion gaps to be greater than 50ms;
S4: in fire point, adopts strabismus Wedge-shaped cut eye, and takes reliever, base plate eye, periphery hole;
S5: described snubber, reliever and base plate eye adopt continuous charging, and described periphery hole adopts not coupling interval to fill the powder stick of described emulsion, is connected on bamboo chip by described powder stick primacord, keeps described powder stick to make somebody a mere figurehead and is centered in described periphery hole;
S6: determine that firing order is by described snubber to described reliever, then to described base plate eye, then to described periphery hole;
S7: the dose upper limit allowing described emulsion according to the described Explosive Vibrating Velocity upper limit, described firing order, explosive parameter, described cyclic advance distance, geological condition and blow-up point to the distance determination single hop of survey mark;
S8: select central drift method excavation, start explosion middle drift.
2. the construction method of heavy in section according to claim 1 tunnel control Explosive Vibrating Velocity, it is characterized in that, described step S1 comprises:
S101: utilize multi-wave and multi-component reflection shooting method to obtain the described geological condition of described construction section;
S102: carry out explosion bulge test according to described geological condition in influence basin front and determine the described Explosive Vibrating Velocity upper limit.
3. the construction method of heavy in section according to claim 2 tunnel control Explosive Vibrating Velocity, it is characterized in that, the step of the method also comprises:
S9: after explosion, removes ballast beyond described middle drift, tunneling peripheral part;
S10: after excavation is slagged tap, with per-fore pouring liquid with small pipe reinforce adjoining rock, preliminary bracing adopts totally-enclosed i iron, and secondary lining adopts the thick steel concrete of 50cm, makes the country rock in described construction section tunnel, preliminary bracing, secondary lining form a totally-enclosed firm tubular composite construction;
S11: continue explosion, return step S8.
4. the construction method of heavy in section according to claim 3 tunnel control Explosive Vibrating Velocity, is characterized in that, adopt Sa Shi formula determination single hop to allow the dose upper limit of described emulsion in described step S7, described Sa Shi formula is as follows:
V＝KˊK(Q
1/3/R)
α
In formula, V is the described Explosive Vibrating Velocity upper limit, and K ˊ is correction factor, and Q is the dose upper limit that single hop allows described emulsion, R is the distance of blow-up point to survey mark, and K, α are the coefficient relevant with blow-up point landform, geological conditions in geological condition and damped expoential.
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| CN201510226242.7A CN104895574B (en) | 2015-05-06 | 2015-05-06 | A kind of construction method of heavy in section tunnel control Explosive Vibrating Velocity |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781560A (en) * | 2016-04-18 | 2016-07-20 | 中建交通建设集团有限公司 | Construction method for ultra-short-distance overlapped line tunnel long-distance guide pit advance control bursting |
| CN106014422A (en) * | 2016-05-24 | 2016-10-12 | 北京科技大学 | Method for determining safety construction section of urban tunnel blasting explosive dosage based on controlled vibration velocity |
| 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 |
| CN107066753A (en) * | 2017-04-28 | 2017-08-18 | 西安工业大学 | The Forecasting Methodology of shallow tunnel blast working earth's surface particle peak value vibration velocity |
| CN109029175A (en) * | 2018-08-03 | 2018-12-18 | 中交（广州）建设有限公司 | House slight dynamite construction method and blast hole loading structure are worn under subway tunnel low coverage |
| 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 |
| CN112525024A (en) * | 2021-01-07 | 2021-03-19 | 中铁十八局集团有限公司 | Method for controlling over-underexcavation of peripheral holes in tunnel drilling and blasting construction |
| CN113279763A (en) * | 2020-12-15 | 2021-08-20 | 重庆工程职业技术学院 | Full-water-pressure energy-gathering blasting shock reduction and energy saving control method, system, terminal and medium |
| CN115388731A (en) * | 2022-09-29 | 2022-11-25 | 中国水利水电第九工程局有限公司 | Technical measure operation method for reducing blasting vibration |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781560A (en) * | 2016-04-18 | 2016-07-20 | 中建交通建设集团有限公司 | Construction method for ultra-short-distance overlapped line tunnel long-distance guide pit advance control bursting |
| CN105781560B (en) * | 2016-04-18 | 2018-04-13 | 中建交通建设集团有限公司 | A kind of construction method of the remote base tunnel look-ahead explosion in super low coverage superimposing thread tunnel |
| 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 |
| CN106014422A (en) * | 2016-05-24 | 2016-10-12 | 北京科技大学 | Method for determining safety construction section of urban tunnel blasting explosive dosage based on controlled vibration velocity |
| 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 |
| CN106014422B (en) * | 2016-05-24 | 2018-02-27 | 北京科技大学 | A kind of safe construction section of city tunnel blasting design dose determines method |
| CN107066753A (en) * | 2017-04-28 | 2017-08-18 | 西安工业大学 | The Forecasting Methodology of shallow tunnel blast working earth's surface particle peak value vibration velocity |
| CN109029175A (en) * | 2018-08-03 | 2018-12-18 | 中交（广州）建设有限公司 | House slight dynamite construction method and blast hole loading structure are worn under subway tunnel low coverage |
| 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 |
| CN113279763A (en) * | 2020-12-15 | 2021-08-20 | 重庆工程职业技术学院 | Full-water-pressure energy-gathering blasting shock reduction and energy saving control method, system, terminal and medium |
| CN113279763B (en) * | 2020-12-15 | 2023-12-19 | 重庆工程职业技术学院 | Full-hydraulic energy-gathering blasting vibration reduction and energy-saving control method, system, terminal and medium |
| CN112525024A (en) * | 2021-01-07 | 2021-03-19 | 中铁十八局集团有限公司 | Method for controlling over-underexcavation of peripheral holes in tunnel drilling and blasting construction |
| CN115388731A (en) * | 2022-09-29 | 2022-11-25 | 中国水利水电第九工程局有限公司 | Technical measure operation method for reducing blasting vibration |
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