CN107782785A - A kind of underground utilities security assessment method - Google Patents
A kind of underground utilities security assessment method Download PDFInfo
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- CN107782785A CN107782785A CN201710808119.5A CN201710808119A CN107782785A CN 107782785 A CN107782785 A CN 107782785A CN 201710808119 A CN201710808119 A CN 201710808119A CN 107782785 A CN107782785 A CN 107782785A
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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
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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
- G01N2291/023—Solids
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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
- G01N2291/025—Change of phase or condition
- G01N2291/0258—Structural degradation, e.g. fatigue of composites, ageing of oils
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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
- G01N2291/028—Material parameters
- G01N2291/02854—Length, thickness
Abstract
The invention discloses a kind of security assessment method of underground utilities, belong to the technical field of underground utilities Testing and appraisal, its step is as follows：S1：Live primitive technology data is collected；S2：Influence factor and distinguishing hierarchy determine；S3：Site inspection detects；S4：The determination of factor of evaluation weight；S5：Safety evaluatio.The present invention determines the weighted value of factors of evaluation at different levels using analytic hierarchy process (AHP), and each influence factor is given a mark on this basis, and final safety grades are divided according to final scoring event.This method can quantify to embody influence of each influence factor to underground utilities security, and operation is simple, and and can ensures that conclusion is scientific and reasonable.
Description
Technical field
The present invention is a kind of underground utilities security assessment method, suitable for the security evaluation of underground utilities, belongs to underground
The technical field of pipe inspection identification.
Background technology
Underground utilities are also referred to as " lifeline ", day and night convey the energy, transmission information, water drainage mitigation for cities and towns and enterprise,
The construction of underground utilities is to modernize the prerequisite of cities and towns and enterprise infrastructure construction.Underground utilities resist the energy of infringement
Power is poor, material can only carry out one-way transmission in pipe, thus very fragile, even small damage may all cause entirely
The paralysis of underground pipelines system；When conveying danger medium in underground utilities, once pipeline breakage may be caused compared with gross leak,
Even explode, jeopardize personal safety, cause environmental pollution, produce huge economic loss, consequence is extremely serious.With China
The continuous development of economic construction, a large amount of underground utilities step into aging period, in recent years, underground piping Frequent Accidents, cause to pacify
Full accident, stopping production accident, environmental pollution, the safe operation problem of underground utilities also increasingly attract people's attention.
Circumstances passive, blindly and by rule of thumb is constantly in for the maintenance and management of underground piping, it is in recent years, related
Personnel are directed to the long oil pipeline road of oil play, have carried out a series of research, it is proposed that some method for evaluating safety, but
Primarily directed to the situation in long oil pipeline road, there is certain limitation, it is difficult to be generalized to other municipal pipelines；In addition, comment
Valency method is established on the basis tested indoors more, and test evaluation result often has a certain distance with actual conditions, real
It is poor with property；And corrode beyond method for evaluating safety and residual intensity based on, be substantially difficult to consider internal corrosion and outside
The combined influence of factor.Corresponding security assessment method is constantly in blank.
For the security of rational evaluation underground utilities, strengthen the technology pipe of the safety and reasonable employment to underground utilities
Reason, accomplishes technically reliable, safe and applicable, economical rationality, need to explore a kind of practical security assessment method.
When the security to underground utilities is assessed, each factor of evaluation influences journey to caused by the security of pipeline
Degree differs.With regard to how to determine final safety grades according to the rating of each factor of evaluation, China《Civil buildings can
By property standard of perfection》GB 50292-1999 and《Industrial building reliability determination standard》GB 50144-2008 give together
The method of sample, i.e., according to the evaluation result of each factor of evaluation, rating of the lower grade therein as security is taken, it is special
Final grade can be modified in the case of different.Although the one kind of underground utilities as engineering structure, relevant building
Security ranking method is not particularly suited for underground utilities, and reason mainly has at following 4 points：
1st, the safety evaluatio factor about building is directly related with the body of building, directly affects building
Security；And the safety evaluatio factor about underground utilities might not be directly directly related with pipeline itself, but shadow
Ring the safety of pipeline；
2nd, the safety evaluatio factor about building is interrelated, collectively constitutes a complete structure, constitutes one
The main body of relative closure；The relevant mutual relevance of underground utilities safety evaluatio factor is poor (or even without interrelated),
The environment of a closing is not formed, is affected by human factors larger；
3rd, the safety evaluatio factor about building is relatively stable, smaller by regional impact；And the peace about underground utilities
Full property factor of evaluation is larger by regional impact, and more flexible, more careful method is needed when evaluating it；
4th, the safety evaluatio factor of relevant building can accomplish qualitative assessment substantially at present, and the safety of underground utilities
Property factor of evaluation can't accomplish qualitative assessment completely at present, and Certain Evaluation Guideline is had a great influence by subjective factor.
Summarize above reason, influence the various factors relative distribution of underground utilities safety evaluatio, and by human factor and
Region factor has a great influence, and for these features, how to provide and a kind of fast and effectively the security of underground utilities is commented
Estimating just turns into the technical barrier that the technical field is badly in need of solving.
The content of the invention
It is an object of the invention to provide a kind of security assessment method of underground utilities, passes through various influence factors point
Analysis and classification, influence factor weighted value are determined, with reference to underground utilities on-site actual situations, and each influence factor is carried out quantifying to beat
Point, so as to fast and effectively assess the security of underground utilities.
To achieve the above object, the present invention uses following technical scheme：
A kind of underground utilities security assessment method, its step are as follows：
1st, a kind of underground utilities security assessment method, its step are as follows：
S1：Live primitive technology data is collected：The primitive technology data of underground utilities is collected, mainly
Including reconnaissance trip, former design as-constructed drawing, Late reformation technical data and the investigation of periphery use environment；
S2：Influence factor and distinguishing hierarchy determine：According to influence underground utilities security each influence factor property,
Each factor of underground utilities security will be directly affected as one-level factor of evaluation, including medium, body and external action in pipe
Factor, each factor of one-level factor of evaluation will be directly affected as two-level appraisement factor, including the corrosivity of medium, pipe in pipe
Body corrodes and bearing capacity, duct size information, the maintenance management of operator and other related measures, other related measures include：Pipe
The publicity of line danger, the publicity of pipeline importance, law publicity, pipeline account for pressure removing, rewards and punishments measure and governance institutions violating the regulations etc.,
Form layer of structure figure；
S3：Site inspection detects：It is main to include detecting the corrosion depth of body and to medium in pipe using audigage
Corrosivity is counter to be pushed away, pipe body corrosion degree is detected by audigage, by ultrasonic guided wave detecting instrument to pipeline
The defects of damaged, is detected, tubular body defect is checked by CCTV pipe inspections robot, combined positioning system
Defective locations are determined, body bearing capacity checked by site inspection testing result, duct size information inspection,
Operator maintenance management investigation, other related measure inspections etc.；
S4：The determination of factor of evaluation weight：Using AHP (step analysis) method, each of target is evaluated by analyzing influence
Factor and mutual relation, by each influence factor of different levels, hierarchy Model is established, in each level
In, each influence factor is compared to each other two-by-two, establishes judgment matrix, corresponding to the eigenvalue of maximum of the judgment matrix
Characteristic vector is weight of this layer of influence factor relative to last layer, reflects the influence journey to each influence factor of last layer
Degree；
S5：Safety evaluatio：Each factor of evaluation is given a mark, and every factor obatained score is collected, according to
The long and that converges determines the safety grades of underground utilities.
The S1's comprises the following steps that：, need to be to the primitive technology of underground utilities before assessing pipeline safety
Data is collected, and is mainly included：Reconnaissance trip, former design as-constructed drawing collection, Late reformation technical data, periphery use
Environmental survey etc., to determine that influence factor and distinguishing hierarchy provide foundation；
The S2's comprises the following steps that：, will be direct according to the property for each influence factor for influenceing underground utilities security
Each factor of pipeline safety is influenceed, such as medium, body and external influence factors in pipe, as one-level factor of evaluation；Will be direct
Each factor of one-level factor of evaluation is influenceed, such as the corrosivity of medium, pipe body corrosion and bearing capacity, duct size information, operation in pipe
(such as pipeline hazard publicity, the publicity of pipeline importance, law publicity, pipeline account for pressure with other related measures for the maintenance management of business
Removing, rewards and punishments measure, governance institutions violating the regulations etc.), as two-level appraisement factor, so as to form layer of structure figure；External action because
The influence factors such as element is the people of pipeline, thing, environment, including duct size information, the maintenance management of operator is related to other arranges
Apply；
The S3's comprises the following steps that：According to factors of evaluation at different levels, inspection inspection is carried out to underground utilities relevant parameter
Survey, check that detection content Main Basiss two-level appraisement factor is determined, it is main to include detecting in pipe using audigage
Corrosive medium is counter to be pushed away, pipe body corrosion degree is detected by audigage, by ultrasonic guided wave detecting instrument pair
The defects of piping failure, is detected, tubular body defect is checked by CCTV pipe inspections robot and is combined fixed
Position system is determined to defective locations, body bearing capacity checked by site inspection testing result, duct size information
Check, operator maintenance management investigation, other related measure inspections (including pipeline hazard publicity, the publicity of pipeline importance,
Law publicity, pipeline account for pressure removing, rewards and punishments measure, governance institutions violating the regulations etc.) etc.；
The detection of dielectric corrosion performance in the pipe：Different corrosive mediums is different in pipe, can be by the unit interval
Index of the corrosion depth (i.e. corrosion rate) of interior formation as corrosive medium, according to《Steel pipe and Corrosion of Tanks evaluation
Standard/buried steel pipeline internal corrosion is directly evaluated》Regulation in SY/T 0087.2 is determined；Pipe body corrosion detection uses
Residual wall thickness after audigage is corroded to body detects, so as to judge body by extent of corrosion；Piping failure is examined
Survey：Detected using the defects of breakage of the ultrasonic guided wave detecting instrument to pipeline, crack, corrosion, combined positioning system is to defect
Position is determined；Internal flaw inspection：The open defect inside pipeline is examined using CCTV pipe inspections robot
Look into, combined positioning system is determined to defective locations；Duct size information check mainly to body caliber, wall thickness, buried depth, arrangement,
Whether the items such as trend, use meet that former design requirement carries out check contrast using parameter；The detection of body bearing capacity needs
Bearing capacity calculation review is carried out to body bearing capacity with reference to site inspection detection case；Operator maintenance management is investigated, main
Refer to operator and management unit to the regular visit of pipeline, feedback communication mechanism, reports source system, the guarantor identified
The data such as shield carry out verification judgement；Other related measures, which check, mainly includes pipeline hazard publicity, pipeline importance a surname
Biography, law publicity, pipeline account for pressure removing, rewards and punishments measure, the inspection for the related measures such as governance institutions of breaking rules and regulations；
The S4's comprises the following steps that：Using AHP methods, each factor and mutually of target is evaluated by analyzing influence
Between relation, pass through each influence factor of different levels, it is established that hierarchy Model, in each level, by each shadow
The factor of sound is compared to each other two-by-two, it is established that judgment matrix, the characteristic vector corresponding to the eigenvalue of maximum of the judgment matrix
As this layer of influence factor reflects the influence degree to each influence factor of last layer relative to the weight of last layer；
The S5's comprises the following steps that：It is layered to each primary evaluation factor, and after determining weight, according to mark
Standard is given a mark to each factor of evaluation, and every factor obatained score is collected, and buried pipe is determined according to remittance the long and
The safety grades of line.
Preferably, the artificial a kind of dress for being accurately positioned underground utilities internal flaw position of the CCTV pipe inspections machine
Put, mainly include motion parts and control section, wherein, motion parts include forward gear, video instrument and displacement transducer,
Control section is portable operation instrument；The video instrument is located at the centre position of the forward gear, and is hung by video instrument
Support is fixed on forward gear, and institute's displacement sensors are fixed on the panel of forward gear, the portable operation instrument point
Not with the forward gear and video instrument wireless connection.
Preferably, the portable operation instrument includes video window, driving control stick (is built in forward gear small data
The inductor being connected according to chip), infrared signal transmission switch, power switch and video instrument record take the photograph switch, video window is located at
The top of portable operation instrument, power switch are located at the top side of portable operation instrument, and the record of video instrument takes the photograph switch positioned at portable
The middle part of formula operation instrument, driving control stick are located at the bottom side of portable operation instrument, and infrared signal transmission switch is positioned at portable
The bottom opposite side of formula operation instrument.
Preferably, the video window is used for receiving the vision signal that the transmission of video instrument comes, and driving control stick is used for carrying out
Advance or back operation, infrared signal transmission switchs to be connected for video instrument and portable operation instrument, makes the picture of video instrument
Face shows on portable operation instrument video window in real time, and the record of video instrument takes the photograph switch and is used for controlling the record of video instrument to take the photograph.
Preferably, one piece of battery built in the portable operation instrument, battery respectively with video window, infrared signal transmission
Switch is connected with driving control stick；Video window includes one piece of lcd color display, described for showing video pictures
Switch is taken the photograph with video record respectively by signal shielding line for LCDs and infrared signal transmission switch connects, the infrared letter
Number transmitting switch built-in sensitive device, inductor are connected by infrared signal with video instrument.
Preferably, the driving control stick built-in sensitive device, the inductor and the small-sized data chip on forward gear
Wireless connection.
Preferably, it is described driving control stick end with its built in inductor be connected using enclosed, driving control stick
Contacted by moving forward and backward to reach with before and after inductor to be powered, realization makes forward gear move forward and backward.
Preferably, the video instrument is provided with wide-angle lens.
Preferably, institute's displacement sensors are provided with storage card.
Preferably, described forward gear includes driving wheel, small-sized data chip and battery, and small-sized data chip is located at
The left side of forward gear, carry out wireless signal with the inductor on portable operation instrument and be connected, battery is located at regarding for forward gear
The rear of frequency instrument.
Preferably, the forward gear also includes micro-machine, and the micro-machine is connected with battery and driving wheel respectively
Connect.
Preferably, the driving wheel is four, and the micro-machine is four.
Preferably, the device for being accurately positioned underground utilities internal flaw position also includes a computer, video instrument and
Displacement transducer is connected by data wire with computer.
Preferably, in the S4, the determination of final step factor of evaluation weight：Medium 0.12 in pipe, body 0.59, outside
Portion's influence factor 0.29；The determination of two-level appraisement factor weight：Corrosivity 1.00, body bearing capacity 0.50, pipe body corrosion
0.50, duct size information 0.29, the maintenance management 0.48 of operator, other related measures 0.23.
Preferably, the standard is specific as follows：The score value of the one-level factor of evaluation is 20, the two-level appraisement factor
It is divided into four grades.
Preferably, the score value of four grades of the two-level appraisement factor is specific as follows：A levels：≥16；B levels：≥12； c
Level：≥6；D levels：<6.
Preferably, the safety grades of underground utilities described in the S5 are divided into four grades：A levels：≥16；B levels >=
12,<16；C levels：>=6,<12；D levels：<6.
Beneficial effect：
The underground utilities security assessment method of the present invention, the weight of factors of evaluation at different levels is determined using analytic hierarchy process (AHP)
Value, is detected by site inspection, the relevant parameter for influenceing factors of evaluation at different levels is measured, on this basis on each influence
Factor is given a mark, and final safety grades are divided according to final scoring event.This method can quantify to embody each influence
Influence of the factor to underground utilities security, operation is simple, and and can ensures that conclusion is scientific and reasonable.
Below by the drawings and specific embodiments, the present invention will be further described, but is not meant to the present invention
The limitation of protection domain.
Brief description of the drawings
Fig. 1 is the layer of structure figure in underground utilities method for evaluating safety of the present invention.
Fig. 2 is to be accurately positioned underground utilities internal flaw position used in underground utilities method for evaluating safety of the present invention
Device motion parts planar structure schematic diagram.
Embodiment
The operating process of the underground utilities security assessment method of the present invention mainly includes：
S1：Live primitive technology data is collected；
S2：Influence factor and distinguishing hierarchy determine；
S3：Site inspection detects；
S4：The determination of factor of evaluation weight；
S5：Safety evaluatio.
The underground utilities security assessment method of the present invention, it is comprised the following steps that：
Step 1, firsthand information investigation
Before carrying out security authentication to underground utilities, primitive technology data that need to be related to underground utilities is investigated, and is adjusted
Looking into content mainly includes：Original design and as-constructed drawing, construction technology data, delivery receiving acceptance record, surrounding enviroment investigation, use
Record, daily inspection report etc., to determine that influence factor and distinguishing hierarchy provide foundation.
Step 2, each factor of evaluation and distinguishing hierarchy determine
In engineering structure the definition of security refer mainly to as defined in the time, it is defined under the conditions of resist load, Bu Zhifa
The raw ability destroyed, the implication that should include in terms of two is defined with regard to the security of underground piping：1), pipeline itself has enough
Security, pipeline will have enough bearing capacitys during operation, can bear as defined in load and will not break
Bad (including pipe body corrosion, rupture, collapse)；2), the people of pipeline, thing, environment etc. are not because of pipeline accident and by weight
Big safety hazard (including the leakage of the combustion explosion, pumped (conveying) medium of medium, environmental pollution etc.).
The present inventor is according to the statistical number of underground utilities industry it has been found that causing the principal element of underground piping accident is
Corrosive pipeline, damage from third-party, design mistake and maloperation, pipeline accident accounts for total accident respectively caused by these factors
50%th, 30% and 20%, therefore, influence underground utilities operation various factors in, using ensure pipeline normal safe operation as
Principle, using the security incident that pipeline is greatly decreased as foundation, the factor for influenceing safety of underground pipeline operation is roughly divided into three
Class：Medium, body, external influence factors in pipe.
As shown in figure 1, it is the layer of structure figure in underground utilities method for evaluating safety of the present invention.
Determining the basic thought of layer of structure figure is, a complicated target is decomposed, forms different levels,
The target of complexity is simplified.According to the property for each influence factor for influenceing underground utilities security, pipeline peace will be directly affected
Each factor of full property will directly affect each factor of one-level factor of evaluation as two-level appraisement factor as one-level factor of evaluation,
So as to form layer of structure figure.Specifically, each factor for influenceing pipe safety is divided into medium in pipe, pipe by the present inventor
Body, the class of external influence factors three, this three classes factor it is directly related with the security of pipeline be used as one-level factor of evaluation, with this three
The directly related factor of class factor is as two-level appraisement factor；Wherein, the two-level appraisement factor of medium is corrosivity in pipe, can
Index using the corrosion depth (i.e. corrosion rate) formed in the unit interval as corrosive medium, according to《Steel pipe and storage
Tank corrosion evaluation standard/buried steel pipeline internal corrosion is directly evaluated》Regulation in SY/T 0087.2 is determined；Body
Two-level appraisement factor is body bearing capacity and pipe body corrosion, its middle tube body bearing capacity, need to combine site inspection detection case
Bearing capacity calculation review is carried out to body bearing capacity, bearing capacity need to consider supersonic guide-wave pipeline when checking is damaged
Testing result and the internal flaw inspection result of CCTV pipeline inspection machine people；Pipe body corrosion detection need to use audigage
Residual wall thickness after being corroded to body judges；The two-level appraisement factor of external influence factors is duct size information, operator
Maintenance management and other related measures, wherein duct size information check mainly to body caliber, wall thickness, buried depth, arrangement, trend,
Whether the items such as use meet that former design requirement carries out check contrast using parameter；Operator maintenance management is investigated, mainly
Refer to the protection of operator and management unit to the regular visit, feedback communication mechanism, reports source system, mark of pipeline
Verification judgement is carried out etc. data；Other related measures, which check, mainly includes pipeline hazard publicity, the publicity of pipeline importance, method
System publicity, pipeline account for the inspection of the related measures such as pressure removing, rewards and punishments measure, governance institutions violating the regulations.
Step 3, site inspection detection
According to each two-level appraisement factor, inspection detection is carried out to underground utilities relevant parameter.
Corrosive medium detects in pipe：Can be using the corrosion depth (i.e. corrosion rate) formed in the unit interval as medium
Corrosive index, according to《Steel pipe and Corrosion of Tanks evaluation criterion/buried steel pipeline internal corrosion are directly evaluated》SY/T
Regulation in 0087.2 is determined, and ranking see the table below 1.Including being detected using audigage to dielectric corrosion in pipe
Property is counter to be pushed away, specific as follows：Use TT110 sonigauges, probe：5P ￠ 10 pop one's head in 1；Battery：AA type alkaline electros
Pond 2 is saved, couplant：1 bottle；When pipeline is initially installed, at a certain distance, its wall thickness is measured, is passing through corrosivity
After liquid 48 hours, its wall thickness is measured again；The difference measured twice is averaged, obtains an average value, according to
The thinned situation of its wall thickness, the corrosivity of the corrosive liquids is reversely estimated.
The corrosive medium opinion rating of table 1
Body bearing capacity detects：Site inspection detection case need to be combined bearing capacity meter is carried out to body bearing capacity
Review is calculated, bearing capacity need to consider pipeline damage testing result and the CCTV pipeline inspection machine people of supersonic guide-wave when checking
Internal flaw inspection result, ranking see the table below 2.
Residual wall thickness after being corroded using audigage to pipeline is detected, so as to judge pipeline by corrosion journey
Degree；It is specific as follows：Use TT110 sonigauges, probe：5P ￠ 10 pop one's head in 1；Battery：AA types alkaline battery 2 saves, coupling
Mixture：1 bottle；According to the concrete condition of pipeline, several points are set, the wall thickness of underground piping is measured, it is average to obtain one
Value, according to the wall thickness of the pipeline original description, judges pipeline by extent of corrosion.
Piping failure detects：Detected using the defects of breakage of the ultrasonic guided wave detecting instrument to pipeline, crack, corrosion；
It is specific as follows：Using the MSGW defect of pipeline scanning instrument (abbreviation MSGW) of Zhejiang University's lean production, visited by configuring special pipeline
Head, realize that defect of pipeline fast checking positions, in detection, instrument applies pumping signal to probe, makes to produce change around coil
The magnetic field of change, because the change of externally-applied magnetic field makes ferromagnetic material produce magnetostrictive effect, the shearing particle in magnetic strap shakes
The dynamic mode for being displaced through coupling, makes guided wave be propagated axially along the pipe with T (0,1) pattern；During guided waves propagation, meet
To defect, a part of ripple can reflect, and another part continues to propagate forward, the guided wave reflected, occurs when passing through probe
Magnetostrictive reaction, produce coil and sense faint electric signal, MSGW is acquired processing to caused signal in coil
Analysis, it is possible to realize the detection of pipeline.Probe is provided with two ways：Couplant coupling couples with air bag, at the scene should
Different coupled modes may be selected in.MSGW probes can be permanently mounted on pipeline, carry out long term monitoring to pipeline, in real time
The corrosion situation of change of feedback channel, real-time reliable information is provided for the maintaining of pipeline.
Pipeline internal flaw inspection：The open defect inside pipeline is checked using CCTV pipe inspections robot,
Combined positioning system is determined to defective locations；
CCTV pipe inspections robot can be a kind of device for being accurately positioned underground utilities internal flaw position, such as Fig. 2
It is shown, it is the device used for being accurately positioned underground utilities internal flaw position in underground utilities method for evaluating safety of the present invention
Motion parts planar structure schematic diagram, wherein, 1 is forward gear, and 2 be video instrument, and 3 be displacement transducer, and 4 be small-sized
Data chip, 5 be battery；The device that the present invention is accurately positioned underground utilities internal flaw position mainly includes two parts：One
Individual is motion parts, and one is control section；Motion parts include forward gear 1, video instrument 2 and displacement transducer 3, control
Part mainly includes portable operation instrument；Video instrument 2 is located at the centre position of forward gear 1, and passes through video instrument suspension holdfast
It is fixed on forward gear 1, video instrument suspension holdfast is primarily used to carry video instrument 2, and displacement transducer 3 is fixed on advance
On the panel of device 1, motion parts are walked inside pipeline by the carrying video of forward gear 1 instrument 2 and displacement transducer 3, examined
Survey, video instrument 2 is recorded into time position corresponding with the time of displacement transducer 3 corresponding to the vision signal of present situation inside pipeline
In-migration determines the particular location of a certain defect, i.e. defective locations.
Video instrument 2 is primarily used to carry out record to pipeline inside to take the photograph, and video instrument 2 is fixed on forward gear 1, is being advanced
Device 1 is provided with a square video instrument suspension holdfast, and video instrument 2 is suspended on video instrument suspension holdfast, and video instrument 2 is matched somebody with somebody
There is wide-angle lens, realize that pipe circumference can be recorded and take the photograph, infrared sensor (being used to launch infrared signal) is carried on video instrument 2,
Video is set to be real-time transmitted on external control devices (portable operation instrument).
Forward gear 1 is really a kind of small machines device, and the device includes four driving wheels, the and of small-sized data chip 4
Battery 5；Driving wheel is primarily used to drive motion parts inside pipeline to advance, and video instrument suspension holdfast is primarily used to hold
Carry video instrument.
Small-sized data chip is mainly manipulated by portable operation instrument to motion parts (including forward gear),
It is set to realize advance in the situation of pipeline external manipulation and fall back, wherein, forward gear 1 is primarily used to drive video
Instrument 2 and displacement transducer 3 advance in pipeline.
Displacement transducer 3 is provided with storage card, and displacement transducer 3 is primarily used to record time and advance displacement, together
Sample is arranged on forward gear 1, every time before use, displacement transducer 3 all is zeroed out into processing, originates time and displacement
Data are zero, and when detecting progress, the storage card built in displacement transducer 3 can deposit the time of advance and displacement data
Storage is got off, and can lead the partial data on computer at the end of detection, and the video data of video instrument 2 carries out the time pair
Than being contrasted to the time of a certain defect in video instrument 2 and the time of displacement transducer, so as to obtain the essence of the defect
True position.
Portable operation instrument includes video window, switch, power switch, driving control stick and infrared letter are taken the photograph in the record of video instrument
Number transmitting switch, video window are located at the top of portable operation instrument, and power switch is located at the top one of portable operation instrument
Side, the record of video instrument take the photograph switch and are located at the bottom one of portable operation instrument positioned at the middle part of portable operation instrument, driving control stick
Side, bottom opposite side of the infrared signal transmission switch positioned at portable operation instrument；Video window is used for showing that the transmission of video instrument comes
Vision signal, driving control stick be used for the present invention be accurately positioned motion portion in the device of underground utilities internal flaw position
Point advanced or back operation, the record of video instrument take the photograph switch and be used for controlling the record of video instrument to take the photograph.
In terms of internal structure, one piece of battery built in portable operation instrument, battery passes with video window, infrared signal respectively
Defeated switch is connected with driving control stick, and after turning on the power switch, video window, infrared signal transmission device and driving manipulate
Bar is powered, and carries out normal work；Video window includes one piece of lcd color display, should for showing video pictures
Switch is taken the photograph with video record respectively by signal shielding line for LCDs and infrared signal transmission switch connects, the infrared signal
Transmitting switch built-in sensitive device, inductor are connected by infrared signal with the video instrument 2 on forward gear 1, reach video instrument 2
On time frequency signal can be real-time transmitted on video window.Control stick built-in sensitive device is driven, on the inductor and forward gear
Small-sized data chip 4 connected by wireless data signal, drive the end of control stick with its built in inductor using surrounding
Formula is connected, and driving control stick is contacted to be powered by moving forward and backward to reach with before and after inductor, and realization enters forward gear 1
The function that row moves forward and backward.
Portable operation instrument is the instrument of a synthesis, what the built-in small-sized data chip with forward gear 1 was connected
Inductor (driving control stick built-in sensitive device), this inductor has two option of operation, that is, advances and fall back, be primarily used to
Operate forward gear 1.
In addition, (Infrared Transmission switchs the built-in inductor being connected with the infrared signal of video instrument 2 of the portable operation instrument
Built-in sensitive device), the picture of video instrument 2 is shown in real time on portable operation instrument video window.
Sediment is there may be in view of pipeline inner bottom part, each driving wheel is driven by a micro-machine, small-sized
Motor links together with driving wheel, and micro-machine one end links together with small-sized data chip, passes through small-sized data chip
The steering of controlled motor, other end are connected with the battery in drive device, switched on power, and realize that each driving wheel can be single
Solely driving, whole device is driven to be walked in pipeline internal by driving wheel, video instrument 2 is provided with wide-angle lens, to entirely breaking in pipeline
The present situation in face can carry out record and take the photograph.When video instrument 2 starts record and taken the photograph, the one side of video instrument 2 voluntarily can believe record storage video
Number, while in video signal transmission to portable operation instrument, will can be reached by self-contained infrared sensor pair
Testing result carries out real-time judge, when judging a certain picture existing defects, records the time corresponding to the picture, to be detected complete
After the segment pipe, take out displacement transducer 3 on storage card, by this block in time --- displacement data export, according to previous
The video pictures time of record, and this time --- displacement data is contrasted, you can draw the displacement of a certain defect with respect to position
Put.
The above-mentioned device for being accurately positioned underground utilities internal flaw position also includes a computer, the data of video instrument 2 and
Data in displacement transducer 3 are connected by data wire with computer.
The steel pipe bearing capacity grade classification of table 2
Note：1st, p' is maximum safe-working pressure in table, and MAOP is maximum allowable working pressure, when pipeline does not take drop
During pressure measure, MAOP takes pipe design pressure；
2nd, when brittle fracture or fatigue fracture occurs in pipeline, directly should be determined by d levels.
Pipe body corrosion detects：It need to judge that grade is commented using the residual wall thickness after audigage is corroded to body
Definite opinion table 3 below.
The pipe body corrosion intensity grade of table 3
| Grade | Feature and conclusion |
| 1 is excellent | Extent of corrosion is light, can be continuing with, without repairing |
| 2 is good | Extent of corrosion is lighter, can still maintain normal operation, but should strengthen monitoring, and arranges to repair |
| In 3 | Extent of corrosion is more serious, is considered as brownout operation or repairing |
| 4 is poor | Extent of corrosion is very serious, has perforated or has been considered as perforation, should repair replacing immediately |
Body information integrity is evaluated：(pipeline species, caliber, buried with detecting the relevant information of collection conduit by inquiry
The basic datas such as depth, material, service condition, strengthening reconstruction), the position of pipeline is judged according to the relevant information being collected into, managed
Footpath, material and danger that may be present etc., so as to propose the method evaded and the scheme solved.Pipeline relevant information can root
Four a levels, b levels, c levels, d levels ranks are divided into according to its integrality and accuracy, are divided by regulation in table 4.
Duct size information checks mainly every to body caliber, wall thickness, buried depth, arrangement, trend, use etc. using ginseng
Whether number meets that former design requirement carries out check contrast.
The duct size information integrity grade classification index of table 4
The management service evaluation of operator：The measure of respectively itemizing of operator management service system is given a mark respectively, then
Respective weight is multiplied by, every results added is obtained into final score value, management service system is divided etc. according to final score
Level, items marking regulation are shown in Table 5, and the gradation of effects of management service system is determined by table 6.
The management service grade scoring table of the operator of table 5
The management service grade classification table of the operator of table 6
Other related measure evaluations：It can be avoided according to the effect of the actual measure taken of each relevant unit and reality
Four sundry item division a levels, b levels, c levels, d levels ranks of third party's accident, projects are given a mark according to regulation in table 7,
Final rating is determined by table 8.
The related measure grade scoring table of table 7
Note：1st, pipe protection publicity mainly includes pipeline hazard propaganda strength, pipeline importance propaganda strength, protection
Consciousness, law publicity etc.；Administration mainly includes rewards and punishments measure, governance institutions, pipe-line construction policy-system violating the regulations etc.；
The 2nd, if existing pipeline can be not counted in this fraction, grading standard reduction in proportion without safety pre-warning system.
The related measure grade classification table of table 8
The determination of step 4, factor of evaluation weight
The determination of one-level factor of evaluation weight：Medium 0.12 in pipe, body 0.59, external influence factors 0.29；Two level is commented
The determination of valency factor weight：Corrosivity 1.00, body bearing capacity 0.50, pipe body corrosion 0.50, duct size information 0.29, operation
The maintenance management 0.48 of side, other related measures 0.23.
Each factor of evaluation weighted value result of calculation see the table below 9.
Table 9
Step 5, safety evaluatio
The existing corresponding evaluation criterion of major influence factors about underground utilities security, on it is each it is main influence because
Element is layered, and after determining weight, can establishing criteria each factor of evaluation is given a mark, and by every factor obatained score
Collected, the safety grades of pipeline are determined according to remittance the long and.Underground utilities safety grades grade form is shown in Table 10.
Table 10
Score value size determination mode corresponding to divided rank in table 2, mainly according to being commonly encountered in engineering experience and engineering
Problem, and be not less than according to 80%, b level of the usual scoring criterion a levels score value not less than total score not less than 60%, the c levels of total score
The 30% of total score is carried out；And with above corresponding to project and the usability assessment item criteria for classifying is consistent hereinafter, keep in full
Scoring criterion uniformity.
Because the evaluation content of projects in table is inconsistent, the total score of projects is also inconsistent in evaluation method；Consider
The influence of weight, the score value of Listed Items is unified in table 2 presses 20 minute marks；When carrying out security scoring, can enter to projects
Fraction obtained by during row evaluation is converted in proportion, is aggregated into upper table.
When carrying out safety evaluatio to plastic conduit, the influence of external influence factors, two-level appraisement factor need to be only considered
1 only is taken with duct size information, the maintenance management of operator, the content of other related measures three, the weight of external influence factors,
The value of two-level appraisement factor is by value in table.
Underground utilities safety grades division form see the table below 11.
Table 11
According to appraisal result, the security of underground utilities is carried out with reference to underground utilities safety grades division form etc.
Level determines.Each grade is represented shown in implication such as table 12 below (the security authentication rating scale of identification pipeline section).
Table 12
The determination method of each factor of evaluation weight
The weight of each factor of evaluation is directly related to final result, will be each using the analytic hierarchy process (AHP) of operational research theory
The influence degree quantification of factor, the influence of artificial subjective factor can be reduced to greatest extent.
During with analytic hierarchy process (AHP), mainly there are following steps：The determination of hierarchical chart, judge square
Solution, the inspection of uniformity of characteristic vector corresponding to the construction of battle array, the eigenvalue of maximum of judgment matrix.Generally judge square
Battle array mainly by the acquisition that seeks advice from experts, when carrying out Judgement Matricies, can invite multidigit expert to be judged with to the greatest extent
The influence of artificial subjective factor may be reduced, it is analysis integrated by being carried out to the judgment matrix for coming from expert, try to achieve respectively each
The weight of level influence factor.
Judgment matrix constructs：In layer of structure figure, factors of evaluation at different levels and its corresponding upper one can be clearly found out
The relation of level factor of evaluation.Because of each factor of evaluation, influence degree is different caused by its upper level factor of evaluation, AHP law regulations,
Factors of evaluation at different levels are compared to each other to determine the weight to its upper level factor of evaluation, according to the difference of importance degree two-by-two
Assign different numerical value.
In layer of structure figure, the factor of evaluation of certain one-level integrates as U={ U1, U2···Un, it is any in evaluate collection U
Take out a pair of factor of evaluation UiAnd Uj, compare UiAnd UjTo the significance level of factor of evaluation corresponding to upper level, judgment value UijTable
Show UiRelative to UjSignificance level, judgment value UjiRepresent UjRelative to UiSignificance level, Uij·Uji=1.
During scoring, UiWith UjCompare to obtain Uij, UjWith UiCompare to obtain Uji, there is Uij·Uji=1.
, can be from this scope when being judged for judgment value scope [1/4,4] corresponding with grade is judged, taking here
In take any value, as its importance index, form the judgment matrix of this grade of factor of evaluation.It is made up of these judgment values
Judgment matrix R：
The solution and consistency check of characteristic vector：The characteristic vector of diagonal matrix, specific method are solved using root method
It is as follows：
A, product M of the judgment matrix per row element is calculatedi
B, to the product M of each row elementiSeek n th Roots
C, the characteristic vector W of judgment matrix=(W1, W2,…,Wn)TSolution
By vectorNormalization or normalization process, are obtained：
By WiThe vectorial W of formation is the characteristic vector of judgment matrix, W in formulaiFor i-th of the element for the W that limits the quantity.
D, the eigenvalue of maximum λ of judgment matrix is solvedmax
Due to eigenvalue of maximum λmaxAccurately solution it is complex, therefore λmaxApproximate solution can be by formula
In formula (RW)iRepresent vectorial RW i-th of element.
E, consistency check
In analytic hierarchy process (AHP), the characteristic vector obtained is the weight of corresponding factor of evaluation.Due to each factor of evaluation
Between interrelated, subjective factor influence and to evaluate target actual conditions grasp it is in confused situation really etc. reason all can
Cause the result that solves and actual deviation, it is ensured that the weight of solution with actual conditions are completely the same is nearly impossible,
But if deviation is excessive, then the weight solved can not represent actual conditions, also just lose original meaning, it is therefore desirable to
The reasonability of weight to obtaining is tested.According to the theory of analytic hierarchy process (AHP), needed after characteristic vector is solved to it
Carry out consistency check.
When carrying out consistency check, using random consistency ration CR as the index for weighing uniformity, work as CR<0.1
When, illustrate that judgment matrix has satisfactory consistency, the weight coefficient of solution can receive.Random consistency ration CR is as the following formula
Calculate
CR=CI/RI
In formula：The random consistency ration of CR --- judgment matrix；
The coincident indicator of CI --- judgment matrix；
RI --- random index.
The coincident indicator of judgment matrix can be calculated as follows：
Each factor of evaluation quantification is gone out safety evaluatio fraction by the present invention further according to the weight calculation of each factor,
Draw final safety evaluatio grade.The mainly determination including each influence factor weight, each influence of its technical measures taken
The steps such as factor marking, final result evaluation.The present invention is in order to which by each influence factor quantification, scoring can not as far as possible
The key issue of avoidance is exactly the determination of influence factor weight.
The inventive method prospect is extensive, has good economic benefit and social benefit.
After the content of the invention lectured has been read, those skilled in the art the present invention can be done it is various change or
Modification, these equivalent form of values equally fall within the application scope claimed.
Claims (8)
1. a kind of underground utilities security assessment method, its step are as follows：
S1：Live primitive technology data is collected：The primitive technology data of underground utilities is collected, it is main to include now
Field is made an on-the-spot survey, former design as-constructed drawing, Late reformation technical data and periphery use environment are investigated；
S2：Influence factor and distinguishing hierarchy determine：, will be direct according to the property for each influence factor for influenceing underground utilities security
Each factor of underground utilities security is influenceed as one-level factor of evaluation, including medium, body and external influence factors in pipe, will
Each factor of one-level factor of evaluation is directly affected as two-level appraisement factor, including the corrosivity of medium in pipe, pipe body corrosion and
Bearing capacity, duct size information, the maintenance management of operator and other related measures, other related measures include：Pipeline hazard
Publicity, the publicity of pipeline importance, law publicity, pipeline account for pressure removing, rewards and punishments measure and governance institutions violating the regulations, form layer of structure
Figure；
S3：Site inspection detects：It is main to include detecting the corrosion depth of body and to dielectric corrosion in pipe using audigage
Property is counter to be pushed away, pipe body corrosion degree is detected by audigage, by ultrasonic guided wave detecting instrument to piping failure
The defects of detected, tubular body defect checked by CCTV pipe inspections robot, combined positioning system to lack
Sunken position is determined, body bearing capacity is checked by site inspection testing result, duct size information inspection, operator
Maintenance management investigation, other related measure inspections；
S4：The determination of factor of evaluation weight：Using AHP methods, each factor and between each other of target is evaluated by analyzing influence
Relation, by each influence factor of different levels, hierarchy Model is established, in each level, by each influence factor
It is compared to each other two-by-two, establishes judgment matrix, the characteristic vector corresponding to the eigenvalue of maximum of the judgment matrix is the layer
Influence factor reflects the influence degree to each influence factor of last layer relative to the weight of last layer；
S5：Safety evaluatio：Each factor of evaluation is given a mark, and every factor obatained score is collected, according to collecting
Result determine the safety grades of underground utilities.
2. underground utilities security assessment method according to claim 1, it is characterised in that：The CCTV pipe inspections machine
A kind of artificial device for being accurately positioned underground utilities internal flaw position；Mainly include motion parts and control section, wherein, fortune
Dynamic part includes forward gear, video instrument and displacement transducer, and control section is portable operation instrument；The video instrument is located at institute
The centre position of forward gear is stated, and is fixed on by video instrument suspension holdfast on forward gear, institute's displacement sensors are fixed
In on the panel of forward gear, the portable operation instrument respectively with the forward gear and video instrument wireless connection.
3. underground utilities security assessment method according to claim 2, it is characterised in that：The accurate determination underground utilities
The device of internal flaw position also includes a computer, and the video instrument and displacement transducer are connected with computer.
4. underground utilities security assessment method according to claim 3, it is characterised in that：The portable operation instrument includes
Switch is taken the photograph in video window, driving control stick, infrared signal transmission switch, power switch and the record of video instrument, and video window is positioned at just
The top of formula operation instrument is taken, power switch is located at the top side of portable operation instrument, and the record of video instrument takes the photograph switch positioned at portable
The middle part of operation instrument, driving control stick are located at the bottom side of portable operation instrument, and infrared signal transmission switch is positioned at portable
The bottom opposite side of operation instrument.
5. underground utilities security assessment method according to claim 1, it is characterised in that：The weight of one-level factor of evaluation
For：Medium 0.12 in pipe, body 0.59, external influence factors 0.29；The weight of two-level appraisement factor is：Corrosivity 1.00, pipe
Body bearing capacity 0.50, pipe body corrosion 0.50, duct size information 0.29, the maintenance management 0.48 of operator, other related measures
0.23。
6. underground utilities security assessment method according to claim 5, it is characterised in that：The standard is specific as follows：Institute
The score value for stating one-level factor of evaluation is 20, and the two-level appraisement factor is divided into four grades.
7. underground utilities security assessment method according to claim 6, it is characterised in that：The four of the two-level appraisement factor
The score value of individual grade is specific as follows：A levels：≥16；B levels：≥12；C levels：≥6；D levels：<6.
8. underground utilities security assessment method according to claim 7, it is characterised in that：Underground utilities described in the S5
Safety grades be divided into four grades：A levels：≥16；B level >=12,<16；C levels：>=6,<12；D levels：<6.
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