CN107152964B - The Blast Vibration Monitoring method of buried underground water supply pipelines in a kind of construction of tunnel benching tunnelling method - Google Patents
The Blast Vibration Monitoring method of buried underground water supply pipelines in a kind of construction of tunnel benching tunnelling method Download PDFInfo
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- CN107152964B CN107152964B CN201710562972.3A CN201710562972A CN107152964B CN 107152964 B CN107152964 B CN 107152964B CN 201710562972 A CN201710562972 A CN 201710562972A CN 107152964 B CN107152964 B CN 107152964B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/12—Measuring characteristics of vibrations in solids by using direct conduction to the detector of longitudinal or not specified vibrations
Abstract
The present invention proposes a kind of Blast Vibration Monitoring method of buried underground water supply pipelines, comprising the following steps: the distance R at the computer tube linear distance tunnel quick-fried source center of top barOn；When explosion is got out of a predicament or an embarrassing situation in tunnel, measuring point N is simutaneously arranged in top bar and face rear1And N2, it is ensured that two measuring points to the quick-fried heart of getting out of a predicament or an embarrassing situation (take tunnel get out of a predicament or an embarrassing situation height half be quick-fried heart point) distance be equal to ROn；Test top bar measuring point N1With tunnel tunnel face rear N2The vibration velocity for locating country rock is V1、V2；The above measurement 3 times is repeated, according to measuring point N1And N2Locate vibration velocity relationship, it can be deduced that V1=nV2；Face rear L' is measured in top bar explosionAfterwardsN ' at distance2The vibration velocity V ' of measuring point2；Deduce the vibration velocity V at pipelinePipe=nV '2；By vibration velocity V at the pipeline of acquisitionPipeIt is compared with the control standard of pipeline blasting vibration safety, evaluates the security situation of pipeline, optimized blast working scheme, instruct tunnel control explosion, it is ensured that pipeline safety.Effective solution of the present invention this technical problem of the Tunnel Blasting vibration monitoring of buried underground utilities has far-reaching influence for constructing tunnel industry.
Description
Technical field
The present invention relates to technical field of tunnel construction, more particularly, to buried groundwater supply in a kind of construction of tunnel benching tunnelling method
The Blast Vibration Monitoring method of pipeline.
Background technique
In recent years, the Tunnel Engineering that underground water supply pipelines are worn under low coverage is more and more.When being excavated using drilling and blasting method, tunnel
Blasting vibration constitutes safely the underground water supply pipelines of short distance and seriously threatens, and blasting vibration is easy to that pipeline is caused to damage,
It even cracks, causes immeasurable economic loss.
It is saved in (2013) " wear underground utilities safeguard measure under Metro entrance and calculate analysis " in Li Jun, calculates and divide
Influence of the concussion of blasting to pipeline is not considered in analysis, does not propose blast monitoring method yet；And in Liang Xiangqian (2009) " underground utilities
Blasting vibration safety test and monitoring " and " Middle Line Project For Transferring Water From South To North Beijing-to-Shijiazhuang section blasting vibration Study on Safety Problem " in, propose
The ground surface monitoring method of shallow embedding (5m) underground utilities: firstly, by having laid 4 groups of sensors at earth's surface, underground 5,10,19m,
Every group of embedded horizontal direction (excavating axis perpendicular to pipeline) and vertical are to two sensors, as shown in Figure 1, test explosion earthquake
Wave studies the Explosive Vibrating Velocity in rock mass at different depth, show that earth's surface vibration velocity value is significantly greater tnan the vibration velocity value at the 5m of underground, and two
Person differs 2~3 times；Then, by surveying to ground vibration velocity, 5 sights are arranged altogether from quick-fried source to natural gas line direction
Measuring point, minimum distance 36.1m, maximum distance 226.2m (pipeline location), measuring point spacing are about pressed logarithm equidistantly distributed, are obtained
Attenuation of seismic waves along ground propagation attenuation rule, Charge control is released with this, instructs blast working.As shown in Figure 1, being existing
Have in technology along depth direction sensor arrangement figure, existing main problem and shortcoming: firstly, pipeline 5m located underground
Left and right, belongs to the pipeline for comparing shallow embedding, is not related to the Blast Vibration Monitoring problem of deep-buried pipeline；Secondly, being on the other hand to pass through
The vibration velocity in rock mass at different depth is tested, show that earth's surface vibration velocity value is significantly greater tnan the vibration velocity value at the 5m of underground, the conclusion is simultaneously
Without generality；Again, by carrying out the attenuation law that actual measurement obtains attenuation of seismic waves to ground vibration velocity, there is no obtain outlet pipe
Explosive Vibrating Velocity at line controls the blasting vibration safety of pipeline with this, and this control is very inaccurate, also relatively dangerous.
It can be seen from the above for buried (buried depth >=20m) underground water supply pipelines and apart from the relatively close (distance≤2D in tunnel
(D is tunnel span)) in the case where, there is presently no corresponding Blast Vibration Monitoring methods.Existing Blast Vibration Monitoring side
Method is mainly for Shallow-Embedded Under-Ground pipeline, by testing ground blasting vibration velocity, to indirectly control the blasting vibration safety of shallow embedding pipeline.
For deep-buried pipeline monitoring problem, due to deep-buried pipeline apart from ground farther out, and it is closer apart from tunnel, at ground vibration velocity and pipeline
Vibration velocity differs greatly, and in the method for ground vibration velocity control pipeline vibration velocity, for buried underground utilities, then significant discomfort is used.It is another
Existing method, the blasting vibration of pipeline bottom position is directly measured by setting deep hole, and party's hair implements very difficult, performance
: first is that not allowing to set deep hole in many cases；Second is that i.e. enabled punching, the installation of sensor is also very difficult, is difficult
Guarantee the precision of installation, implements very difficult.
Therefore, the present invention is directed to the Blast Vibration Monitoring method of buried underground water supply pipelines, since buried depth is big, if still adopted
It is monitored with above method on ground, then will differ greatly with the practical blasting vibration of pipeline, cannot ensure Tunnel Blasting
Vibrate the safety of underground pipelines, it would be highly desirable to propose a kind of new monitoring method.
Summary of the invention
The present invention proposes a kind of Blast Vibration Monitoring method of buried underground water supply pipelines, the buried underground of effective solution
This technical problem of the Tunnel Blasting vibration monitoring of pipeline has far-reaching influence for constructing tunnel industry.
The technical scheme of the present invention is realized as follows: in tunnel benching tunnelling method explosion a kind of buried underground water supply pipelines it is quick-fried
Broken vibration monitoring method, comprising the following steps:
S1, the computer tube linear distance tunnel quick-fried source center of top bar distance ROn；It is quick-fried for taking the half of tunnel top bar height
Heart point, then
S2, when explosion is got out of a predicament or an embarrassing situation in tunnel, be simutaneously arranged measuring point N in top bar and face rear1And N2, it is ensured that two
Measuring point to the quick-fried heart of getting out of a predicament or an embarrassing situation (take tunnel get out of a predicament or an embarrassing situation height half be quick-fried heart point) distance be equal to ROn；
S3, top bar measuring point N is derived according to S21Horizontal distance
S4, face rear measuring point N is derived according to S22Horizontal distance
S5, test top bar measuring point N1With tunnel tunnel face rear N2The vibration velocity for locating country rock is V1、V2；
S6, the above measurement 3 times is repeated, according to measuring point N1And N2Locate vibration velocity relationship, it can be deduced that V1=nV2；
S7, tunnel top bar explosion influence maximum to the water supply line of front of tunnel heading, to obtain front water supply line
Vibration velocity need to only measure face rear L' in top bar explosionAfterwardsN ' at distance2The vibration velocity V ' of measuring point2,
S8, vibration velocity V at pipeline is deduced according to S6Pipe=nV '2；
S9, by vibration velocity V at the pipeline of acquisitionPipeIt is compared with the control standard of pipeline blasting vibration safety, evaluates pipeline
Security situation, optimize blast working scheme, instruct tunnel control explosion, it is ensured that pipeline safety.
As a kind of perferred technical scheme, the specific test method of step S2-S7 is that measurement obtains tunnel span D respectively,
Tunnel top bar height HOnWith the height H that gets out of a predicament or an embarrassing situationUnder, underground utilities diameter d, tunnel water supply line distance from top ground H1, tunnel
Water supply line distance from bottom tunnel vault H2, then when explosion is got out of a predicament or an embarrassing situation in tunnel in top bar LBeforeMeasuring point N is arranged at distance1With
Explosion face rear country rock side wall LAfterwardsMeasuring point N is arranged at distance2, test top bar measuring point N1With tunnel tunnel face rear N2Place
The vibration velocity of country rock is V1、V2；Face rear L' is measured in top bar explosionAfterwardsN ' at distance2Measuring point tests N '2The vibration of measuring point
Fast V '2。
Using above-mentioned technical proposal, the invention has the benefit that monitoring method of the invention is simple and easy, Ke Yi
Tunnel Blasting face rear is directly tested, avoid set deep hole test difficulty, also avoid in ground test cannot
The disadvantage for reflecting vibration velocity at deep-buried pipeline can obtain the Explosive Vibrating Velocity at accurate pipeline by solving algebraic mean value
Data can directly make an appraisal to the vibration safety of pipeline, instruct blast working.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is in the prior art along depth direction sensor arrangement figure；
Fig. 2 is that tunnel of the present invention is got out of a predicament or an embarrassing situation the side view of blasting vibration measurement；
Fig. 3 is that tunnel of the present invention is got out of a predicament or an embarrassing situation the front elevation of blasting vibration measurement；
Fig. 4 is the side view of top bar blasting vibration measurement in tunnel of the present invention；
Fig. 5 is the front elevation of top bar blasting vibration measurement in tunnel of the present invention；
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figures 2 and 3,
Implementation steps:
(1) tunnel uses benching tunnelling method explosion, H0=10m, HOn=6m, HUnder=4m, D=16m, h1=1m；It is assumed that tunnel axis
It is parallel with pipeline axis, the vertical distance=H in pipeline distance from bottom Tunnel Blasting face center2+HOn/ 2=10+6/2=13m,
Horizontal distance is LOn=5m, then be calculated R1=13.93m；
(2) assume that certain separate explosion obtains test top bar measuring point LBeforeN at=13.60m distance1With tunnel tunnel face rear LAfterwards
N at=11.36m distance2The vibration velocity for locating country rock is V1=3.0cm/s, V2=1.0cm/s；
(3) it repeats the above measurement to amount to 3 times, V1=3.3cm/s, V2=1.1cm/s；V1=2.7cm/s, V2=0.9cm/
s；According to measuring point N1And N2Locate vibration velocity relationship, it can be deduced that V1=3V2；
(4) when the explosion of tunnel top bar, L' at the distance of tunnel tunnel face rearAfterwardsN ' at=11.23m distance2Measuring point, test
N’2The vibration velocity V ' of measuring point2=1.5cm/s,
(5) according to V1=3V2, vibration velocity V at pipeline is calculatedPipe=3 × 1.5=4.5cm/s；
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (1)
1. in tunnel step method, a kind of Blast Vibration Monitoring method of buried underground water supply pipelines, which is characterized in that
The following steps are included:
S1, the computer tube linear distance tunnel quick-fried source center of top bar distance ROn；The half for taking tunnel top bar height is quick-fried heart point,
Then
S2, when explosion is got out of a predicament or an embarrassing situation in tunnel, be simutaneously arranged measuring point N with face rear getting out of a predicament or an embarrassing situation1And N2, it is ensured that two measuring points
Distance to the quick-fried heart of getting out of a predicament or an embarrassing situation is equal to ROn, wherein take tunnel get out of a predicament or an embarrassing situation height half be quick-fried heart point；
S3, the measuring point N that gets out of a predicament or an embarrassing situation is derived according to S21Horizontal distance
S4, face rear measuring point N is derived according to S22Horizontal distance
S5, the measuring point N that gets out of a predicament or an embarrassing situation is tested1With tunnel tunnel face rear N2The vibration velocity for locating country rock is V1、V2；
S6, the above measurement 3 times is repeated, according to measuring point N1And N2Locate vibration velocity relationship, it can be deduced that V1=nV2；
S7, tunnel top bar explosion the water supply line of front of tunnel heading is influenced it is maximum, only need to be for the vibration velocity for obtaining front water supply line
Face rear L ' is measured when top bar explosionAfterwardsN ' at distance2The vibration velocity V of measuring point2',
S8, vibration velocity V at pipeline is deduced according to S6Pipe=nV '2；
S9, by vibration velocity V at the pipeline of acquisitionPipeIt is compared with the control standard of pipeline blasting vibration safety, evaluates the peace of pipeline
Full situation optimizes blast working scheme, instructs tunnel control explosion, it is ensured that pipeline safety；
The specific test method of step S2-S7 is that measurement obtains tunnel span D, tunnel top bar height H respectivelyOnWith height of getting out of a predicament or an embarrassing situation
Spend HUnder, underground utilities diameter d, tunnel water supply line distance from top ground H1, tunnel water supply line distance from bottom tunnel vault H2,
Pipeline distance from bottom Tunnel Blasting face central horizontal distance LOn, then when explosion is got out of a predicament or an embarrassing situation in tunnel in the L that gets out of a predicament or an embarrassing situationBeforeDistance
Place arrangement measuring point N1With explosion face rear country rock side wall LAfterwardsMeasuring point N is arranged at distance2, test the measuring point N that gets out of a predicament or an embarrassing situation1The tunnel and
Face rear N2The vibration velocity for locating country rock is V1、V2；Country rock side wall L ' in face rear is measured in top bar explosionAfterwardsAt distance
N’2Measuring point tests N '2The vibration velocity V ' of country rock at measuring point2。
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| CN108362583A (en) * | 2017-12-28 | 2018-08-03 | 武汉科技大学 | A kind of simulation explosive load is on closing on the experimental rig and method that buried oil-gas pipeline influences |
| CN108489601B (en) * | 2018-03-28 | 2020-01-31 | 青岛理工大学 | Blasting vibration monitoring and controlling method for tunnels passing through underground pipeline in short distance |
| CN114674418B (en) * | 2022-02-18 | 2022-11-22 | 深圳大学 | Monitoring method and device for particle vibration inside tunnel shaft blasting construction surrounding rock |
| CN115371791A (en) * | 2022-07-19 | 2022-11-22 | 青岛理工大学 | Underground pipeline vibration velocity measuring method and system |
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| CN104390537A (en) * | 2014-09-23 | 2015-03-04 | 武汉大学 | Method for controlling damage of slope pre-splitting blasting digging based on blast vibration test |
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| JP2003075247A (en) * | 2001-08-31 | 2003-03-12 | Nishimatsu Constr Co Ltd | Method for measuring elastic wave speed in face in tunnel pit |
| CN103217703B (en) * | 2013-04-11 | 2016-03-23 | 中国科学院武汉岩土力学研究所 | A kind ofly to blow out as the geological extra-forecast method of focus and device with face |
| CN105973456B (en) * | 2016-04-25 | 2019-07-30 | 宏大矿业有限公司 | A kind of method of in-site measurement deep hole blasting Explosive-rock matching relationship |
| CN105954357B (en) * | 2016-04-25 | 2019-10-11 | 宏大矿业有限公司 | Method that is a kind of while measuring the horizontal rock mass velocity of sound of multi-step |
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