CN202718148U - Nondestructive effect testing device for grouting foundation of immersed tube tunnel - Google Patents
Nondestructive effect testing device for grouting foundation of immersed tube tunnel Download PDFInfo
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- CN202718148U CN202718148U CN 201220263404 CN201220263404U CN202718148U CN 202718148 U CN202718148 U CN 202718148U CN 201220263404 CN201220263404 CN 201220263404 CN 201220263404 U CN201220263404 U CN 201220263404U CN 202718148 U CN202718148 U CN 202718148U
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- immersed tube
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- tube tunnel
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses a nondestructive effect testing device for a grouting foundation of an immersed tube tunnel. The nondestructive effect testing device comprises an impact wave excitation component, an impact wave detection component, a recording component and a computer, wherein an input end of the impact wave detection component detects an impact elastic wave signal excited by the impact wave excitation component, and an output end of the impact wave detection component is connected to the recording component; an input end of the recording component records the impact elastic wave signal detected by the impact wave detection component, and an output end of the recording component is connected to the computer; and the computer process the received record data into a profile map according to practical positions and outputs and displays the profile map. The device is low in cost, fast and convenient to detect, simple and reliable, and evaluates the space distribution state of the grouting foundation of the immersed tube tunnel through exciting the impact wave on the concrete surface of a bottom slab of the immersed tube tunnel, recording the collected proper elastic wave with solid frequency in a certain range, and analyzing the changes on the wave shape, frequency spectrum, wavelet and the like of the collected elastic wave.
Description
Technical field
The utility model relates to a kind of geotechnical engineering and detect, particularly the cannot-harm-detection device of the basic effect of a kind of immersed tube tunnel slip casting.
Background technology
Along with the use of lossless detection method in geotechnical engineering, the geotechnical engineering structure Gernral Check-up has obtained very large development.Present geotechnical engineering structure lossless detection method mainly contains rebound method, radar method, impact echo method and supercritical ultrasonics technology etc.Rebound method is the most frequently used a kind of lossless detection method, but rebound method can only record the quality condition of body structure surface, and its internal soundness information but can't be learnt; Radar method can accurately be located the inside configuration defective, but is subjected to the impact of reinforcing bar low-resistivity layer shielding larger, be difficult to obtain reinforcing bar reflected image behind when especially reinforcing bar density is larger, and radar can't provide the information of intensity aspect; The impact echo method can record the thickness of inside configuration defective and member, but its longitudinal frame is lower, and accuracy of detection is subjected to the reinforcing bar of inside configuration and water content to affect larger; Ultrasonic wave although can obtain the velocity of longitudinal wave parameter of material monolithic, can't be applied to the detection of underground geotechnical engineering to wearing test.Surface wave is a kind of elastic wave along the media table Es-region propagations, and its spread speed and material dry density, compressive strength etc. have good correlation.Therefore, the defective that detects the mechanical property of geotechnical structure material and existence with it is significant, has obtained great attention in the application facet of the nondestructive testing of geotechnical engineering structure.
The utility model content
The utility model provides the cannot-harm-detection device of a kind of immersed tube tunnel slip casting basis effect, for detection of slip casting state, cavity distribution etc. in the immersed tube tunnel slip casting Foundation Design, solves the above-mentioned deficiency that exists in the prior art.
The utility model is achieved through the following technical solutions:
The cannot-harm-detection device of a kind of immersed tube tunnel slip casting described in the utility model basis effect, comprise: shock-wave excitation parts, shock-wave detection parts, recording-member and computer, described shock-wave detection parts input detects the impact elasticity ripple signal that the shock-wave excitation parts excite, and output is connected to recording-member; The impact elasticity ripple signal that described recording-member input record is detected by described shock-wave detection parts, output is connected to computer; Described computer is processed the record data that receive and is according to actual position via made sectional drawing and output display.
Further, described shock-wave excitation parts are used for knocking dielectric surface and produce impact elasticity ripple signal, and the object of certain mass can be arranged for steel ball etc.
Further, described shock-wave detection parts are the parts that are positioned at impact elasticity ripple signal on the survey line, that shock point produces when knocking dielectric surface.
Further, described shock-wave detection parts adopt the velocity profile wave detector, the coupling on maintenance and ground during detection.
Further, described recording-member is digital seismograph.
Low, the quick and easy detection of the utility model installation cost, by at immersed tube tunnel underplate concrete surface excitation shock wave (P ripple), then record the simple component of the suitable intrinsic frequency that arranges in its certain limit or the elastic wave that three-component geophone gathers, the spatial distribution state on the Assessment of Changes immersed tube tunnel slip casting bases such as the elastic wave waveform that collects by analysis, frequency spectrum, small echo, simple and reliable, solve the deficiencies in the prior art.
Description of drawings
Fig. 1 the utility model one concrete Application Example structured flowchart;
The specific embodiment
The below elaborates to embodiment of the present utility model, and present embodiment is implemented as prerequisite take technical solutions of the utility model, provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
As shown in Figure 1, it is the structured flowchart of the utility model one embodiment, comprise: shock-wave excitation parts 1, shock-wave detection parts 2, recording-member 3 and computer 4, described shock-wave detection parts 2 inputs detect the impact elasticity ripple signal that shock-wave excitation parts 1 excite, and output is connected to recording-member 3; The impact elasticity ripple signal that described recording-member 3 inputs record is detected by described shock-wave detection parts 2, output is connected to computer 4; 4 pairs of record data that receive of described computer are processed and are according to actual position via made sectional drawing and output display.
Described shock-wave excitation parts 1 are used for knocking dielectric surface and produce impact elasticity ripple signal, and the object of certain mass can be arranged for steel ball etc.
Described shock-wave detection parts 2 adopt the velocity profile wave detector, keep the coupling on wave detector and ground during detection.
Described recording-member 3 is digital seismographs.
The detection data of the 4 pairs of recording-members of described computer record are arranged in order by the size of shock-wave detection parts coordinate and obtain an original common offset reflection section, then carry out distributed wave, spectrum distribution, time-frequency distributions processing, result is according to actual position via made sectional drawing.
Present embodiment implementation condition and details of operation are as follows:
(1) testing conditions: detect section need keep dry, smooth, from 0.5 ~ 1.0 meter of wave detector four shock points are being set.
(2) wave detector setting: adopt the velocity profile wave detector, intrinsic frequency: 4.0 ~ 100Hz.The coupling that need keep wave detector and ground during detection, the concrete pier that wave detector is connected with ground, area 10 * 10cm, inner mortar or concrete are connected with ground by three screws.
(3) recording-member: recording-member can be any digital seismograph, the digital recorder (various universal seismographs get final product) of the above high cut-off frequency of 24 A/D converters and 5kHz.
(4) excite parts: the steel ball about 500 grams hits detection faces from 0.3 ~ 0.5 meter high freely falling body.
(5) measuring process: at first surveyed area is carried out gridding, sizing grid 0.5 ~ 1.0m * 0.5 ~ 1.0m, and grid is numbered.During detection, put a wave detector at the center of grid, the steel ball about restraining with 1 500 hits grid from 0.3 ~ 0.5 meter high freely falling body 4 angles.Steel ball is fastened with rope, packs up rope in the moment that tactile base plate rebounds, in case two-hit.The data of four shock points are noted down separately, the processing stage, reject defective signal then on average as a signal.Then mobile 2 wave detectors detect next grid after having detected a grid.So repeat, until cover whole detection plane.
(6) Computer Processing: computer is arranged in order by the size of wave detector coordinate the elastic wave signal of record, obtain an original common offset reflection section, then put in order detecting data, comprise distributed wave, spectrum distribution, time-frequency distributions etc., result is according to actual position via made sectional drawing reach together very clear.The processing method that detects data can adopt minute waveform to distribute or the time-frequency distributions method.
The utility model testing result adopts distributed wave or time-frequency distributions, and visualization processing will form two class sections and comprehensive two kinds of results finally form the testing result section, is used for the spatial distribution state of evaluation Complicate soil medium.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be apparent.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (6)
1. the cannot-harm-detection device of immersed tube tunnel slip casting basis effect, it is characterized in that comprising: shock-wave excitation parts, shock-wave detection parts, recording-member and computer, wherein: described shock-wave detection parts input detects the impact elasticity ripple signal that the shock-wave excitation parts excite, and output is connected to recording-member; The impact elasticity ripple signal that described recording-member input record is detected by described shock-wave detection parts, output is connected to computer; Described computer is processed the record data that receive and is according to actual position via made sectional drawing and output display.
2. the cannot-harm-detection device of immersed tube tunnel slip casting according to claim 1 basis effect, it is characterized in that: described shock-wave excitation parts are the objects that produce impact elasticity ripple signal, have certain mass be used to knocking dielectric surface.
3. the cannot-harm-detection device of immersed tube tunnel slip casting according to claim 1 basis effect is characterized in that: described shock-wave detection parts are the parts that are positioned at impact elasticity ripple signal on the survey line, that shock point produces when knocking dielectric surface.
4. according to claim 1 or the cannot-harm-detection device of 3 described immersed tube tunnel slip castings basis effects, it is characterized in that: described shock-wave detection parts are the velocity profile wave detector.
5. the cannot-harm-detection device of the basic effect of immersed tube tunnel slip casting according to claim 4 is characterized in that: the coupling on maintenance and ground when described shock-wave detection parts detect.
6. the cannot-harm-detection device of immersed tube tunnel slip casting according to claim 1 basis effect, it is characterized in that: described recording-member is digital seismograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263404 CN202718148U (en) | 2012-06-06 | 2012-06-06 | Nondestructive effect testing device for grouting foundation of immersed tube tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220263404 CN202718148U (en) | 2012-06-06 | 2012-06-06 | Nondestructive effect testing device for grouting foundation of immersed tube tunnel |
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| CN202718148U true CN202718148U (en) | 2013-02-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220263404 Expired - Lifetime CN202718148U (en) | 2012-06-06 | 2012-06-06 | Nondestructive effect testing device for grouting foundation of immersed tube tunnel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862940A (en) * | 2016-05-10 | 2016-08-17 | 上海交通大学 | Pipe bottom pressure monitoring system and method for sand filling of foundation of immersed tube tunnel |
| CN111501857A (en) * | 2020-04-08 | 2020-08-07 | 上海交通大学 | Time-space monitoring method and system for foundation construction state of immersed tunnel |
-
2012
- 2012-06-06 CN CN 201220263404 patent/CN202718148U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105862940A (en) * | 2016-05-10 | 2016-08-17 | 上海交通大学 | Pipe bottom pressure monitoring system and method for sand filling of foundation of immersed tube tunnel |
| CN105862940B (en) * | 2016-05-10 | 2018-10-23 | 上海交通大学 | Immersed tube tunnel basis fills sandpipe bottom pressure and monitors system and method |
| CN111501857A (en) * | 2020-04-08 | 2020-08-07 | 上海交通大学 | Time-space monitoring method and system for foundation construction state of immersed tunnel |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130206 |