CN108037184A - Tunnel inverted arch detection of construction quality method - Google Patents
Tunnel inverted arch detection of construction quality method Download PDFInfo
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- CN108037184A CN108037184A CN201711072300.0A CN201711072300A CN108037184A CN 108037184 A CN108037184 A CN 108037184A CN 201711072300 A CN201711072300 A CN 201711072300A CN 108037184 A CN108037184 A CN 108037184A
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- surface wave
- inverted arch
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
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Abstract
The present invention relates to a kind of tunnel inverted arch detection of construction quality method, it includes the following steps, step 1：In tunnel, the inverted arch surface of inverted arch carries out hammering epicenter excitation, the echo-signal that geophone group collection hammering focus produces in tunnel inverted arch；Step 2：Rayleigh surface wave signal is extracted in echo-signal；Step 3：Two-dimentional fourier transform is carried out to the rayleigh surface wave signal collected and obtains frequency and wave-number spectrum；Step 4：According to rayleigh surface wave wave number and the relation of rayleigh surface wave frequency, calculate the phase velocity of rayleigh surface wave, then the wavelength of rayleigh surface wave is conversed, the phase velocity of rayleigh surface wave is multiplied by each depth coefficient can obtain surface wave speed under each depth of tunnel inverted arch, then according to the surface wave speed under the phase velocity of rayleigh surface wave and each depth of tunnel inverted arch, the dispersion curve of rayleigh surface wave is drawn out.The available result resolution ratio higher of Surface wave prospecting of the present invention.
Description
Technical field
The present invention relates to Geophysical technique field, and in particular to a kind of tunnel inverted arch detection of construction quality method.
Background technology
At present, the problem of inverted arch construction in tunnel is primarily present has Thickness Strength deficiency, inverted arch bottom to have empty slag, reinforcing bar missing
Or bar spacing is exceeded etc..These common problems in inverted arch construction can destroy tunnel overall structure, and it is grand inverted arch occur
Rise, Lining cracks the problems such as, cause serious security incident.
The method of tunnel inverted arch detection of construction quality, primarily now there is geological radar method, core drilling method, sonic method, transient electrical
Magnetic method, Ultrasonic Resilience Comprehensive Method in Construction, Seismic Imaging Method and infra-red detection method etc..In Practical Project physical prospecting detects work, most often
The lossless detection method used is geological radar method, but geological radar method has these points defect in inverted arch context of detection：
1st, working frequency is higher, therefore wavelength is short, is influenced when medium is non-uniform very big.
2nd, investigation depth is small, larger to inverted arch Thickness sensitivity resultant error.
3rd, radar only has single track, and the useful signal and invalid signals collected all concentrates in together, and interference is bigger, bad
Extract actual parameter.
4th, detections of radar can not be used when inverted arch filling contains more water.
Also it is difficult to when the 5th, detecting inverted arch reinforcing bar quantitative.
The content of the invention
It is an object of the invention to for problems of the prior art, propose a kind of tunnel inverted arch detection of construction quality
Method.The present invention proposes Surface wave prospecting method being introduced into tunnel inverted arch detection of construction quality engineering.It is intended to by this invention,
It is shallow to solve the investigation depth that current inverted arch construction quality field is faced, inverted arch reinforcing bar is without the key technique problem such as standard measure.
In order to solve the above technical problems, a kind of tunnel inverted arch detection of construction quality method disclosed by the invention, its feature exist
In：It includes the following steps：
Step 1：In tunnel, the inverted arch surface of inverted arch carries out hammering epicenter excitation, and is set on the inverted arch surface of tunnel inverted arch
The geophone group arranged along tunnel inverted arch length direction, first wave detector in geophone group apart from 100~150 meters of focus,
The echo-signal that the geophone group collection hammering focus produces in tunnel inverted arch；
Step 2：Using the speed difference for disturbing ripple and rayleigh surface wave in the echo-signal, other interference are eliminated, are carried
Take rayleigh surface wave signal；
Step 3：Two-dimentional fourier transform is carried out to the rayleigh surface wave signal collected and obtains frequency and wave-number spectrum, frequency and ripple
Number spectrum is used to react the geologic structure inside tunnel inverted arch, the depth of frequency tunnel inverted arch corresponding with the frequency in wave-number spectrum；
Step 4：According to rayleigh surface wave wave number and the relation of rayleigh surface wave frequency, the phase velocity V of rayleigh surface wave is calculatedR,
Then the wavelength X of rayleigh surface wave is conversedR=VR/ f, f are rayleigh surface wave frequency, then the phase velocity V by rayleigh surface waveRIt is multiplied by each
A depth coefficient can obtain the surface wave speed under each depth of tunnel inverted arch, then according to the phase velocity V of rayleigh surface waveRAnd tunnel
Surface wave speed under each depth of road inverted arch, draws out the dispersion curve of rayleigh surface wave, and is made with the dispersion curve of rayleigh surface wave
For the foundation of tunnel inverted arch detection of construction quality.
Beneficial effects of the present invention are：
1st, rayleigh surface wave frequency is low, and medium influences it smaller, improves the accuracy of tunnel inverted arch detection.
2nd, rayleigh surface wave investigation depth is deep compared with radar, can more comprehensively detect the structure of tunnel inverted arch；
3rd, rayleigh surface wave surface wave is Multi-channel detection, strong antijamming capability；
4th, water does not influence rayleigh surface wave, further increases the antijamming capability of the present invention.
5th, rayleigh surface wave is different obvious in concrete and reinforcing bar medium wave speed difference, can fast and accurately judge that tunnel is faced upward with this
The internal structure of arch.
In the present invention, rayleigh surface wave frequency is low, and media variations are smaller on its energy attenuation influence, since energy itself is stronger
Therefore investigation depth is deeper.Rayleigh surface wave is propagated in non-uniform dielectric in itself has Dispersion, and wavelength is different, penetration depth
Also different, different wave length reflects the medium situation of different depth.Based on above characteristic, the available result of Surface wave prospecting is differentiated
Rate higher.
Brief description of the drawings
Fig. 1 is tunnel inverted arch detection of construction quality site operation figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
A kind of tunnel inverted arch detection of construction quality method of the present invention, it includes the following steps：
Step 1：In tunnel, the inverted arch surface of inverted arch carries out hammering epicenter excitation, and is set on the inverted arch surface of tunnel inverted arch
The geophone group (24 wave detectors) arranged along tunnel inverted arch length direction, first wave detector in geophone group is apart from focus
100~150 meters, the echo-signal that the geophone group collection hammering focus produces in tunnel inverted arch；
Step 2：Using the speed difference for disturbing ripple and rayleigh surface wave in the echo-signal, other interference are eliminated, are carried
Take rayleigh surface wave signal；
Step 3：Two-dimentional fourier transform is carried out to the rayleigh surface wave signal collected and obtains frequency and wave-number spectrum, frequency and ripple
Number spectrum is used to react the geologic structure (it can be seen that defect area) inside tunnel inverted arch, frequency and the frequency in wave-number spectrum
The depth of corresponding tunnel inverted arch；
Step 4：According to rayleigh surface wave wave number and the relation of rayleigh surface wave frequency, the phase velocity V of rayleigh surface wave is calculatedR,
Then the wavelength X of rayleigh surface wave is conversedR=VR/ f, f are rayleigh surface wave frequency, then the phase velocity V by rayleigh surface waveRIt is multiplied by each
A depth coefficient can obtain the surface wave speed under each depth, then according to the phase velocity V of rayleigh surface waveRUnder each depth
Surface wave speed, draw out the dispersion curve of rayleigh surface wave, and (dispersion curve is accordingly lower each with the dispersion curve of rayleigh surface wave
The rayleigh surface wave velocity information of kind construction, defect sturcture is found out using this) it is used as the foundation of tunnel inverted arch detection of construction quality.Pass through
The position of defect sturcture can be found out to the dispersion curve progress observation analysis of rayleigh surface wave, realize tunnel inverted arch construction quality inspection
Survey.
In above-mentioned technical proposal, hammer focus and geophone group is arranged at the intermediate region of tunnel inverted arch.
In the step 1 of above-mentioned technical proposal, the spacing of two neighboring wave detector is 0.5~2 meter in geophone group.
In above-mentioned technical proposal, the detection frequency of each wave detector in geophone group is 0.1~10 hertz.The frequency
Match with surface wave frequency.
In above-mentioned technical proposal, in tunnel, inverted arch carries out common-source point row of the surface wave exploration data acquiring using seismic exploration
Row, using artificial hammering focus.Common-source point arrangement 24 seismic channels of selection.
In above-mentioned technical proposal, superficial part subterranean strata can be layered by the dispersion curve of rayleigh surface wave, and pass through
The rate conversion of rayleigh surface wave is shear wave velocity, analyzes the property of ground and the change of medium, and can also investigate in stratum
Weak intercalated layer and underground cavity etc..
The content that this specification is not described in detail belongs to the prior art known to professional and technical personnel in the field.
Claims (3)
- A kind of 1. tunnel inverted arch detection of construction quality method, it is characterised in that：It includes the following steps：Step 1：In tunnel, the inverted arch surface of inverted arch carries out hammering epicenter excitation, and is set on the inverted arch surface of tunnel inverted arch along tunnel The geophone group of road inverted arch length direction arrangement, first wave detector in geophone group are described apart from 100~150 meters of focus The echo-signal that geophone group collection hammering focus produces in tunnel inverted arch；Step 2：Using the speed difference for disturbing ripple and rayleigh surface wave in the echo-signal, other interference are eliminated, extraction is auspicious Thunder surface wave signal；Step 3：Two-dimentional fourier transform is carried out to the rayleigh surface wave signal collected and obtains frequency and wave-number spectrum, frequency and wave-number spectrum For reacting the geologic structure inside tunnel inverted arch, the depth of frequency tunnel inverted arch corresponding with the frequency in wave-number spectrum；Step 4：According to rayleigh surface wave wave number and the relation of rayleigh surface wave frequency, the phase velocity V of rayleigh surface wave is calculatedR, Ran Houhuan Calculate the wavelength X of rayleigh surface waveR=VR/ f, f are rayleigh surface wave frequency, then the phase velocity V by rayleigh surface waveRIt is multiplied by each depth Coefficient can obtain the surface wave speed under each depth of tunnel inverted arch, then according to the phase velocity V of rayleigh surface waveRWith tunnel inverted arch Surface wave speed under each depth, draws out the dispersion curve of rayleigh surface wave, and is used as tunnel using the dispersion curve of rayleigh surface wave The foundation of inverted arch detection of construction quality.
- 2. inverted arch detection of construction quality method in tunnel according to claim 1, it is characterised in that：In the step 1, detection The spacing of two neighboring wave detector is 0.5~2 meter in device group.
- 3. inverted arch detection of construction quality method in tunnel according to claim 1, it is characterised in that：It is each in geophone group The detection frequency of wave detector is 0.1~10 hertz.
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| CN201711072300.0A CN108037184A (en) | 2017-11-03 | 2017-11-03 | Tunnel inverted arch detection of construction quality method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580779A (en) * | 2018-12-12 | 2019-04-05 | 山东大学 | The full-automatic real-time system for monitoring and pre-warning of inverted arch structure and method |
| CN109763831A (en) * | 2018-12-13 | 2019-05-17 | 武汉市工程科学技术研究院 | Tunneling shield construction detection method |
| CN112765774A (en) * | 2020-12-25 | 2021-05-07 | 青岛黄海学院 | Railway seismic source Rayleigh surface wave mechanical model and numerical simulation method thereof |
| CN114280146A (en) * | 2021-12-10 | 2022-04-05 | 招商局重庆交通科研设计院有限公司 | A quick collection system of interference wave for concrete inverted arch structure surface |
| CN117233753A (en) * | 2023-11-08 | 2023-12-15 | 江苏筑升土木工程科技有限公司 | Roadbed disease body and underground disease body depth detection method based on surface wave dispersion curve |
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| CN105220715A (en) * | 2014-06-05 | 2016-01-06 | 施利斌 | A kind of method applying Rayleigh wave test ultra-deep rotary churning pile water protecting curtain integrality |
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| CN105220715A (en) * | 2014-06-05 | 2016-01-06 | 施利斌 | A kind of method applying Rayleigh wave test ultra-deep rotary churning pile water protecting curtain integrality |
| CN107745263A (en) * | 2017-10-09 | 2018-03-02 | 武汉市工程科学技术研究院 | It is a kind of can two-sided processing upset workbench |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580779A (en) * | 2018-12-12 | 2019-04-05 | 山东大学 | The full-automatic real-time system for monitoring and pre-warning of inverted arch structure and method |
| CN109763831A (en) * | 2018-12-13 | 2019-05-17 | 武汉市工程科学技术研究院 | Tunneling shield construction detection method |
| CN112765774A (en) * | 2020-12-25 | 2021-05-07 | 青岛黄海学院 | Railway seismic source Rayleigh surface wave mechanical model and numerical simulation method thereof |
| CN114280146A (en) * | 2021-12-10 | 2022-04-05 | 招商局重庆交通科研设计院有限公司 | A quick collection system of interference wave for concrete inverted arch structure surface |
| CN117233753A (en) * | 2023-11-08 | 2023-12-15 | 江苏筑升土木工程科技有限公司 | Roadbed disease body and underground disease body depth detection method based on surface wave dispersion curve |
| CN117233753B (en) * | 2023-11-08 | 2024-01-30 | 江苏筑升土木工程科技有限公司 | Roadbed pest and underground pest depth detection method based on surface wave dispersion curve |
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Application publication date: 20180515 |