CN109297658A - A method of test shield duct piece waterproof sealing gasket sealing performance - Google Patents
A method of test shield duct piece waterproof sealing gasket sealing performance Download PDFInfo
- Publication number
- CN109297658A CN109297658A CN201811094241.1A CN201811094241A CN109297658A CN 109297658 A CN109297658 A CN 109297658A CN 201811094241 A CN201811094241 A CN 201811094241A CN 109297658 A CN109297658 A CN 109297658A
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- China
- Prior art keywords
- sealing gasket
- duct piece
- waterproof sealing
- shield duct
- piezoelectric film
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to a kind of methods for testing shield duct piece waterproof sealing gasket sealing performance, comprising the following steps: step 1: carrying out stress using jack pair piezoelectric film sensor and voltage relationship is demarcated；Step 2: the piezoelectric film sensor demarcated being pasted in the waterproof sealing gasket of specified measuring point；Step 3: keeping the contact port position for the piezoelectric film sensor demarcated and assembled shield machine segment；Step 4: contact port is connect simultaneously acquisition and recording electric signal with external items of equipment；Step 5: the electric signal of acquisition is compared according to stress and the corresponding contact pressure of voltage relationship inverting and with contact pressure as defined in waterproof failure index.Compared with prior art, the present invention has the advantages that reliability is high, and adaptable, full-featured, expansion is strong, the achievable identification to shield duct piece waterproof sealing gasket contact pressure, and accuracy of identification is high.
Description
Technical field
The present invention relates to field of traffic waterproof detection techniques, close more particularly, to a kind of test shield duct piece waterproof sealing gasket
The method of sealing property.
Background technique
With the continuous increase of urban transportation geostatic pressure, city track traffic engineering is constantly carried out in recent years, same with this
When, more and more rail traffics are that the influence to ground environment is avoided to construct using shield method, with this, concerning shield tunnel
The waterproof performance that ability is used for a long time in road increasingly attracts attention.
Currently, shield tunnel is influenced by factors such as the deformation of section of jurisdiction, opening, faulting of slab ends, cracks, it is usually present percolating water and asks
Topic, seriously affects the normal service performance in tunnel and operation security, and to solve the problems, such as seam waterproof in engineering, it is main by setting
Waterproof sealing gasket completion is set, contact pressure of the waterproof performance mainly between by waterproof sealing gasket is controlled, do not surveyed intuitively still at present
Try the effective ways of the contact pressure, meanwhile, by contact pressure can inverting tunnel seam open, the important states such as displacement structure
Parameter, and at present still without the complete evaluation index and method of a set of abutment joint safety.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of test shield duct pieces
The method of waterproof sealing gasket sealing performance realizes the measurement to the performance indicator, meanwhile, with measuring system inverting tunnel
Road structure safe condition, realize tunnel water proofing during stage, subregion sex determination, guarantee tunnel operation security.
The purpose of the present invention can be achieved through the following technical solutions:
A method of test shield duct piece waterproof sealing gasket sealing performance, which comprises the following steps:
Step S1: stress is carried out using jack pair piezoelectric film sensor and voltage relationship is demarcated；
Step S2: the piezoelectric film sensor demarcated is pasted in the waterproof sealing gasket of specified measuring point；
Step S3: the contact port position for the piezoelectric film sensor (1) demarcated and assembled shield machine segment are kept；
Step S4: contact port is connect simultaneously acquisition and recording electric signal with external items of equipment；
Step S5: the electric signal of acquisition is referred to according to stress contact pressure corresponding with voltage relationship inverting and with waterproof failure
Contact pressure as defined in marking is compared.
Preferably, the piezoelectric film sensor by protective film, piezoelectric transducer, internal connection line, pick out port
Composition, for when it is by action of compressive stress, upper/lower electrode to generate electric signal between surface.
Preferably, the external items of equipment includes connecting line, signal amplifier and data analysis equipment, the connection
The both ends of line are connected to the picking out between port and the access interface of the signal amplifier of the piezoelectric film sensor, and
The signal amplifier picks out between port and the access interface of the data analysis equipment.
Preferably, the voltage magnitude of the output signal of the signal amplifier is -5V~+5V.
Preferably, the number of the piezoelectric film sensor is at least 1.
Preferably, the number of the signal amplifier is at least 1.
Preferably, the data analysis equipment is to be equipped with the data analysis equipment of signal identification analysis software, is used for
Demarcation signal, control sampling sample frequency, typing acquire information.
Preferably, picking out for the signal amplifier also sets between port and the access interface of the data analysis equipment
It is equipped with routing adapting appts.
Preferably, the anti-watertight is provided in the circumferential weld layout area and longitudinal joint layout area of the shield machine segment
Packing.
Preferably, contact pressure as defined in the waterproof failure index is 0.6Mpa.
Compared with prior art, the invention has the following advantages that
(1) equipment reliability is high.It is measured using contact pressure of the piezoelectric film sensor to section of jurisdiction waterproof sealing gasket,
Equipment durability is good, is disturbed that degree is small, and the precision of monitoring is high, and error is small, and data have confidence level.
(2) all kinds of shield tunnel constructions are applicable in.Two kinds of erection methods of the applicable fissure of displacement of this method or straight joint, can be used for difference
The shield tunnel construction of seam, section of jurisdiction shape, and several anti-watertights to several seam crossings of shield duct piece can be completed at the same time
The monitoring of packing, while not limited by seam shape, it is suitable for various types of sections of jurisdiction and waterproof sealing gasket.
(3) acquisition system is full-featured.Acquisition system used in test method is multiple integration acquisition system, can be real-time
Feedback, remote control, in extraneous load action, mobilism, which obtains true waterproof failure sequence, can be not only used for on-the-spot test,
It can also be used for experimental test, facilitate and carry out engineering monitoring or anti-wate research.
(4) diversified environment is adapted to.The test method can simultaneously respond load and displacement, can be to conventional native lotus
It carries, overload, the environment of the extraneous load shifts such as unloading or closing foundation ditch excavate, close under shield external world deformation caused by wearing etc.
Environment carry out it is round-the-clock, without stopping identification not.
Detailed description of the invention
Fig. 1 is the concrete structure diagram that the present invention applies；
Fig. 2 is the shield machine segment concrete structure diagram in the present invention；
Fig. 3 is the partial structural diagram at the segment joint in the present invention；
Fig. 4 is specific workflow figure of the invention；
Fig. 5 is idiographic flow schematic diagram of the invention；
Fig. 6 is functional diagram of the invention；
Drawing reference numeral explanation:
1 is piezoelectric film sensor；2 be connecting line；3 be signal amplifier；4 be data analysis equipment；5 be shield machine pipe
Piece；51 be circumferential weld layout area；52 be longitudinal joint layout area；6 be waterproof sealing gasket.
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 embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
Embodiment
It is illustrated in figure 5 a kind of method for testing shield duct piece waterproof sealing gasket sealing performance of the present invention, including following step
It is rapid:
Step S1: stress is carried out using jack pair piezoelectric film sensor 1 and voltage relationship is demarcated；
Step S2: the piezoelectric film sensor 1 demarcated is pasted in the waterproof sealing gasket 6 of specified measuring point；
Step S3: the contact port position for the piezoelectric film sensor 1 demarcated and assembled shield machine segment 5 are kept；
Step S4: contact port is connect simultaneously acquisition and recording electric signal with external items of equipment；
Step S5: the electric signal of acquisition is referred to according to stress contact pressure corresponding with voltage relationship inverting and with waterproof failure
Contact pressure as defined in marking is compared.
Corresponding concrete structure schematic diagram when being applied as depicted in figs. 1 and 2 by the present invention, at single segment joint
Specific arrangement is as shown in figure 3, be provided with the anti-watertight in the circumferential weld layout area and longitudinal joint layout area of shield machine segment 5
Packing 6 arranges piezoelectric film sensor 1 in 5 longitudinal joint waterproof sealing gasket of shield machine segment, 6 groove for shield tunnel longitudinal joint
Any position, and sensor being protected with polymeric membrane, for shield tunnel circumferential weld, arrange piezoelectric film sensor 1 in
Any position in 6 groove of circumferential weld waterproof sealing gasket.When shield tunnel construction stress, longitudinal joint and circumferential weld water-proof sealing strip extruding force are sent out
Raw to change, all piezoelectric film sensors 1 access signal amplifier 3 by connecting line 2, and export to data analysis equipment 4
Compression information, to complete the system identification between the contact pressure shield duct piece gasket, wherein piezoelectric film sensor
It 1 by protective film, piezoelectric transducer, internal connection line, picks out port and forms, for when it is by action of compressive stress, up and down
Electric signal is generated between electrode surface, the port that picks out that the both ends of connecting line 2 are connected to piezoelectric film sensor 1 is amplified with signal
Between the access interface of device 3 and signal amplifier 3 picks out between port and the access interface of data analysis equipment 4, signal
The voltage magnitude of the output signal of amplifier 3 is -5V~+5V, and the number of piezoelectric film sensor 1 and signal amplifier 3 is extremely
It is less 1, data analysis equipment 4 is to be equipped with the data analysis equipment of signal identification analysis software, for demarcation signal, control
Sample sample frequency, typing acquires information.
It, can be as the case may be by piezoelectric film sensor 1 and several letters if you need to which multiple regions are carried out while being tested
Number amplifier 3 connects, while by connecting line accessing same router etc. other are routed multiple ports that pick out of amplifier
Adapting appts are connect eventually by adapting appts with data analysis system, realize the multi-region domain test of same data analysis system.
For multi-region domain measurement, failed areas can be determined by the further inverting of the test data full shield duct piece waterproof failure stage, completed
Waterproof performance of the waterproof sealing gasket performance in whole Lining Ring is determined, so that the Precise control of abundant waterproof sealing gasket refers to
Mark.
Mainly there are two the stages as shown in figure 4, implementing test method of the invention for workflow of the invention.
In the debugging stage, on the one hand piezoelectric film sensor 1 need to be preloaded according to maximum load pressure, adjustment letter
The circuitous resistance of number amplifier 3, thus control and receive range in the reasonable scope, such as ± 5V；On the other hand, using jack pair
Piezoelectric film sensor 1 carries out multi-stage loading and recording voltage variation, to demarcate stress-electricity of the piezoelectric film sensor 1
(p-U) relationship of pressure, converts real-time voltage signal to for the later period refutation process of real-time stress data, facilitates and judge seam pressure
Whether power reaches waterproof failure index.
In service stage, by the piezoelectric film sensor 1 demarcated with sticker in the waterproof sealing gasket 6 of specified measuring point,
And notice that protect piezoelectric film sensor 1 picks out port, so that piezoelectric film sensor 1 is completed assembled work with section of jurisdiction, it
After connect items of equipment, the electric signal of abutment joint pressure conversion is acquired, while passing through stress-voltage (p-U) relationship inverting
The corresponding contact pressure of electric signal is compared with the contact pressure of waterproof failure index defined, to realize that the present invention sentences
The function of disconnected shield duct piece waterproof sealing gasket sealing performance, shield tunnel waterproofing design, which follows, " relies mainly on prevention, is multi-way prevention, comprehensive
The principle of conjunction improvement ", according to domestic and international cross-river tunnel design experiences, it is contemplated that design period (100 years) internal stress relaxation, material
Aging etc. influences, and gasket remains to resist maximum water pressure outside tunnel.Therefore, gasket waterproofing pressure design value is usually in maximum
On the basis of external water pressure, multiplied by certain safety coefficient." shield tunnel waterproof technique specification " (DBJ08-50-96) rule
Fixed: design hydraulic pressure should be 2~3 times of the maximum hydraulic pressure of practical receiving.The design hydraulic pressure and safety coefficient of domestic and international similar engineering take
Value is as shown in the table:
It, can be according to the practical with reference to mark of the ground such as Shanghai and Nanjing for the shield tunnel in the shallow embedding area of current urban area
Quasi- 0.6MPa determines that the contact pressure of the waterproof failure index defined in the present invention sentences ratio to be monitored.
Functional diagram of the invention as shown in fig. 6, the present invention using contact pressure test as core, it is each in the case where obtaining multi-stage loading
After the test data of pressure of seam, according to the Pressure Variation of each seam, can from the time and space to being connect in loading procedure
The situation of change of seam is divided into and is in safe pressure index or more always, partial pressure is in safe pressure index or more and complete
In safe pressure index hereinafter, to spatially carry out subregion division to shield tunnel, stage evaluation is carried out in time,
The more comprehensive working condition for comprehensively describing waterproof sealing gasket is realized with each seam data total evaluation tunnel safety state
To the Precise control of waterproof sealing gasket performance.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (10)
1. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance, which comprises the following steps:
Step S1: stress is carried out using jack pair piezoelectric film sensor (1) and voltage relationship is demarcated；
Step S2: the piezoelectric film sensor demarcated (1) is pasted in the waterproof sealing gasket (6) of specified measuring point；
Step S3: the contact port position for the piezoelectric film sensor (1) demarcated and assembled shield machine segment (5) are kept；
Step S4: contact port is connect simultaneously acquisition and recording electric signal with external items of equipment；
Step S5: it is advised by the electric signal of acquisition according to stress contact pressure corresponding with voltage relationship inverting and with waterproof failure index
Fixed contact pressure is compared.
2. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance according to claim 1, which is characterized in that
The piezoelectric film sensor (1) by protective film, piezoelectric transducer, internal connection line, pick out port and form, for working as it
When by action of compressive stress, upper/lower electrode generates electric signal between surface.
3. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance according to claim 1, which is characterized in that
The external items of equipment includes connecting line (2), signal amplifier (3) and data analysis equipment (4), the connecting line (2)
Both ends be connected to the picking out between port and the access interface of the signal amplifier (3) of the piezoelectric film sensor (1),
And the signal amplifier (3) picks out between port and the access interface of the data analysis equipment (4).
4. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance according to claim 3, which is characterized in that
The voltage magnitude of the output signal of the signal amplifier (3) is -5V~+5V.
5. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance according to claim 1, which is characterized in that
The number of the piezoelectric film sensor (1) is at least 1.
6. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance according to claim 3, which is characterized in that
The number of the signal amplifier (3) is at least 1.
7. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance according to claim 1, which is characterized in that
The data analysis equipment (4) is to be equipped with the data analysis equipment of signal identification analysis software, for demarcation signal, control
Sample sample frequency, typing acquires information.
8. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance according to claim 3, which is characterized in that
The picking out of the signal amplifier (3) is additionally provided with routing and is adapted between port and the access interface of the data analysis equipment
Equipment.
9. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance according to claim 1, which is characterized in that
The waterproof sealing gasket (6) are provided in the circumferential weld layout area and longitudinal joint layout area of the shield machine segment (5).
10. a kind of method for testing shield duct piece waterproof sealing gasket sealing performance according to claim 1, feature exist
In contact pressure as defined in the waterproof failure index is 0.6Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811094241.1A CN109297658A (en) | 2018-09-19 | 2018-09-19 | A method of test shield duct piece waterproof sealing gasket sealing performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811094241.1A CN109297658A (en) | 2018-09-19 | 2018-09-19 | A method of test shield duct piece waterproof sealing gasket sealing performance |
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| CN109297658A true CN109297658A (en) | 2019-02-01 |
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| CN201811094241.1A Pending CN109297658A (en) | 2018-09-19 | 2018-09-19 | A method of test shield duct piece waterproof sealing gasket sealing performance |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883678A (en) * | 2019-03-25 | 2019-06-14 | 宁波用躬科技有限公司 | Predict the experimental rig and its test method of water-swellable gasket service life |
| CN110779665A (en) * | 2019-11-12 | 2020-02-11 | 中铁开发投资集团有限公司 | Prefabricated pipe gallery seam water seepage detection method based on piezoelectric impedance |
| CN113340475A (en) * | 2021-05-20 | 2021-09-03 | 东南大学 | Device and method for testing contact stress between shield tunnel segments |
| CN113420482A (en) * | 2021-06-24 | 2021-09-21 | 北京安捷工程咨询有限公司 | Segment load orthogonal numerical inversion method based on structural internal force monitoring value |
| CN113790753A (en) * | 2021-08-19 | 2021-12-14 | 北方工业大学 | Reliability monitoring device for key components of coal mine underground explosion-proof electrical equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883678A (en) * | 2019-03-25 | 2019-06-14 | 宁波用躬科技有限公司 | Predict the experimental rig and its test method of water-swellable gasket service life |
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| CN113340475A (en) * | 2021-05-20 | 2021-09-03 | 东南大学 | Device and method for testing contact stress between shield tunnel segments |
| CN113340475B (en) * | 2021-05-20 | 2022-11-18 | 东南大学 | Device and method for testing contact stress between shield tunnel segments |
| CN113420482A (en) * | 2021-06-24 | 2021-09-21 | 北京安捷工程咨询有限公司 | Segment load orthogonal numerical inversion method based on structural internal force monitoring value |
| CN113790753A (en) * | 2021-08-19 | 2021-12-14 | 北方工业大学 | Reliability monitoring device for key components of coal mine underground explosion-proof electrical equipment |
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Effective date of registration: 20201026 Address after: 200092 Shanghai City, Yangpu District Siping Road No. 1239 Applicant after: TONGJI University Applicant after: CRRC QINGDAO SIFANG Co.,Ltd. Address before: 200092 Shanghai City, Yangpu District Siping Road No. 1239 Applicant before: TONGJI University |
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Application publication date: 20190201 |