CN109117556A - A kind of shield driving range prediction method based on shield cutter cutter zone-division LASIK performance - Google Patents
A kind of shield driving range prediction method based on shield cutter cutter zone-division LASIK performance Download PDFInfo
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Abstract
The invention discloses a kind of shield driving range prediction methods based on shield cutter cutter zone-division LASIK performance.The thinking study knife disc tool universal quantitative law that reliability changes during the cutting process that this method is degenerated based on reliability theory binding performance, and analyze it, evaluate, design and control, and be contemplated that tool wear history.Using probability statistics principle and consider the integrated environment of shield driving, the shield cutter system for considering environmental factor abrasion loss under bay status, which is drawn out, in conjunction with a large amount of engineering experiences provides reference with the space coordinate variation diagram of advance distance for the open the cabin prediction of tool changing distance of shield under all kinds of environment.This patent is capable of with crossing the advance distance for controlling tool wear rational prediction shield, can be to open a position the active predicting of tool change position in shield tunnel construction Working Out The Scheme and selection provides scientific method.
Description
Technical field
The invention patent relates to a kind of shield driving range prediction method based on shield cutter cutter zone-division LASIK performance,
Especially suitable for the biggish arenaceous stratum of tool abrasion.
Background technique
Important engineering method one of of the shield method as soft soil layer tunnel excavation is widely used in each metropolitan both at home and abroad
In subway construction.Not enough due to the understanding to advance distance in earth pressure balanced shield, EPBS progradation and tool wear relativeness
Thoroughly, the tool changing distance that causes to open the cabin is arranged not reasonable, and because tool changing is serious apart from too long tool wear, propulsive efficiency is drastically reduced
The phenomenon that happen occasionally.
The theoretical research and engineering practice of current shield cutter tool wear are all ground substantially with the cutter for measurement of opening the cabin for several times
Damage value is fed back to core, is handled and is calculated by a series of statistical datas, establishes tool abrasion with propulsion referring to engineering experience
The variation model of distance.However the environmental condition of shield tunneling is multifarious, shield cutter itself is even more one complicated non-thread
Property, the force structure with randomness, therefore be often distorted using linear statistical theory in general sense.Knife existing simultaneously
Tool Wear prediction model often focuses on the propulsion environment for taking notice of in the abrasion loss of cutter and seldom shield, causes to predict mould
The universality of type is had a greatly reduced quality.And numerous existing models are to predict the abrasion loss of single cutter, but cutterhead is many
The aggregate of multicutter, the height of cutterhead propulsion capability are not that single tool wear situation can determine, and should will be on cutterhead
The abrasion loss of each cutter is unified to be considered, the abrasion of overall merit knife disc tool and the cutting power of cutterhead.Nowadays all kinds of shields
Tool wear monitoring knife is generally fitted provided in structure tooling system to assess the cutting ability of cutterhead, but only by detection knife data
It is able to achieve passive tool changing, prior assessment cannot be carried out to tool wear situation in stratum locating for shield before shield driving, can not done
It cannot reflect knife disc tool system overall wear situation additionally, due to detection knife limited amount to the prediction of active tool changing point.Base
In discussed above, there is also more short slab, combinations of the present invention to promote environmental consideration knife for existing tool wear prediction model
The shield driving range prediction method of dise knife tool system reliability above has some superiority in reasonable prediction tool changing distance.
Zhao Jianyin etc. (National University of Defense Technology, 2005) is proposed to be lost using reliability theory calculating machine electronic system
The calculation method of probability is imitated, reliability theory is reasonably introduced into the failure prediction of mechanical-electronic system by this method, is had
There is certain novelty, it is contemplated that reliability theory is not applied to shield knife technically by shield cutter wear problem, research
Mill damage prediction, though theoretical, rationally there is also the definition of many models to be not thorough, in advance in special Wear prediction problem
It surveys and assumes incomplete theoretical short slab.And it studies the related discussion of running environment progress for just not considering original part, does not exist
Taking into account environmental factor in observed quantity degeneration observation and analysis causes the final result scope of application too narrow.
Reliability theory has been applied to different advance distance knives by Guan Huisheng etc. (railway construction technology, 2017 (09): 1-5)
In the analysis for having abrasion condition, cutterhead reliability has been sought with the variation function of shield driving distance, and finally predict regulation
The advance distance of shield under cutterhead reliability.Article is reasonably distributed this strong statistical means with We ibul l,
Tool abrasion and shield driving range prediction are combined with reliability theory well.But the research is for knife disc tool
Subregion is not reasonable, which is circumferentially divided into 12 regions for cutterhead, takes the flat of several position abrasion losses in each region
Representative of the mean value as survey region average value, however each position exists because of its radial position difference away from cutter head center on cutterhead
The cutting mileage that cutterhead different parts are passed by under the same advance distance of shield is different, and the abrasion loss of generation is naturally variant,
The abrasion in different radial positions region is that " inhomogeneity abrasion " can not make simple average calculating operation to it on cutterhead.Simultaneously
The research does not consider the environmental factors such as stratum abrasion during using reliability theory prediction shield driving distance,
So that the research achievement of this paper and engineering site derail, widespread popularity and universality are reduced.
Summary of the invention
The application aims to solve at least one of the technical problems existing in the prior art.For this purpose, an object of the present invention
Be to provide the shield driving of the high shield cutter cutter zone-division LASIK performance of a kind of simple process, clear logic, practicability away from
From prediction technique.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of shield driving range prediction method based on shield cutter cutter zone-division LASIK performance, includes the following steps
Step S 1: the environment of research section shield driving is considered, determines environmental assessment value；
Step S2: shield cutter is in the different tool wear situations for promoting mileage under the environment of statistical research section, it is believed that every
Secondary tooling system abrasion loss meets normal distribution (formula 1), it is believed that tooling system failure meets Weibull distribution (formula 2)；
Wherein: j indicates the different subregions of cutterhead, and i indicates cutter different in same subregion, zijFor under a certain advance distance
The abrasion loss of a certain cutter of certain subregion, μjIt fixes a cutting tool the mean value of abrasion loss for cutterhead region specific under the distance, σjThe region cutter
The variance of abrasion loss；
Wherein: x is the advance distance of shield, and β, λ are two characteristic parameters；
Step S3: concentric circles subregion is carried out by radial to shield cutter, the approximate cutter of length of cut is classified as the same area
(being generally divided into 5 regions), and dynamic micro-adjustments are carried out to tool position；
Step S4: a certain specific concentric circles subregion on research cutterhead counts region knife between certain adjacent tool changing twice
Have system wear amount, calculates the mean value and variance of each tool abrasion in subregion；
Wherein:For the variance of tool abrasion in the region,For the mean value of tool abrasion in the region, zijFor
The abrasion loss of certain cutter in the region, m are the number of cutters in the region；
Step S5: tool failure threshold value d (generally d=20mm) is chosen referring to correlation engineering experience, in normal distribution letter
The reliability R under shield cutter selection survey region difference advance distance is calculated in number；
Wherein: zijFor the abrasion loss of a certain cutter of certain subregion on cutterhead under a certain advance distance；
Step S6: according to the tooling system cutting ability reliability under the different advance distances being calculated in step S5
Value solves the calculation formula that Tool in Cutting performance reliability changes with advance distance using mathematical method；
Wherein: x is the advance distance of shield, and λ, β are to need the tooling system cutting ability reliability solved with advancing distance
From two characteristic parameters in variation formula；
Step S7: other subregion tooling system cutting ability reliabilitys of cutterhead are solved with the variation formula of advance distance, most
The function curve group of same cutterhead different subregions difference tool reliability variation under a certain environment of a characterization is obtained eventually；
Wherein: j indicates different subregions on cutterhead；
Step S8: the plane right-angle coordinate for considering advance distance, tooling system cutting ability reliability is drawn, by cutterhead
The Reliability Function curve of each subregion is drawn into coordinate system；
Step S9: different building-site tool wear data are collected, and environmental assessment is carried out to each scene, by step S1
The abrasion Reliability Function group of the tooling system under all kinds of environmental assessment values is solved to step S8, is that class function is drawn into space by this
Rectangular coordinate system, similar functional link obtain a curved surface group at face；
Step S10: calculating its environmental assessment value for a certain scene, the corresponding phase out in the curved surface group that step S9 is drawn
Curve group is answered, the shield that mutually should allow for can be solved in response curve group according to the practical tooling system reliability needs of engineering and pushed away
Into distance.
Further, shield driving environmental assessment value S is calculated using the following formula of formula in step S1；
S=0.8Sr+0.2Sp (8)
Wherein: Sr is stratum abrasive environments assessed value, SpFor shield driver's quality environmental assessment value.
Further, stratum abrasive environments assessed value SrIt is determined by rock abrasiveness index RAI, rock abrasiveness
Index RAI calculation formula is as follows:
Wherein: UCS is rock mass without lateral confinement uniaxial compressive strength, AiFor certain minerals content, SiIt is ground for the Luo Xiwaer of mineral
Grind hardness.
Further, in step sl to can be potentially encountered in the discussion of formation hardness research section shield across it is multiple not
With the stratum of hardness, it can take in face of this situation and first individually score each penetrating ground hardness, then further according to respectively passing through
Formation length is weighted summation to the scoring on each stratum, and the comprehensive score of stratum abrasion is calculated；
Further, the multiple statistics of step S4 tooling system abrasion loss, abrasion loss make following determine: determining upper one first
The attrition value of each cutter obtains two as difference further according to each tool wear value that this measurement obtains on cutterhead after secondary measurement tool changing
Between secondary measurement as shield driving and caused by tool abrasion.
Compared with prior art, the technical advantages of the present invention are that:
Advantage (1): studying tool wear using reliability theory, and utilizing with reliability theory is the probability statistics supported
The wear condition of the overall cutter of model comprehensive consideration keeps prediction result more comprehensively reliable.
Advantage (2): carrying out radial subregion to cutterhead, carries out sort research to the cutter of different cutting mileages, avoids " different
The reliability function curve that class abrasion " is obscured research and generated excessively is distorted.
Advantage (3): being contemplated the environmental factor of shield cutter propulsion during studying tool wear, so that research knot
Fruit more has universality and practicability.
Advantage (4): there are the collection products of a different engineering site tool wear situations in the application process of this method
Tired process, can finally draw out and provide the reference surface group of reference for engineering active tool changing range predictions all kinds of under varying environment.
Advantage (5): this method is during predicting advance distance it is contemplated that the abrasion of cutter is gone through compared with the conventional method
History can consider the abrasion condition of its knife disc tool before shield driving starts, calculate its propulsion before knife disc tool can
By degree, corresponding advance distance is solved on corresponding reliability curves.
Advantage (6): can be pre- according to different section shield cutter running-in wear states and the corresponding change dynamic for promoting environment
The advance distance that each section is allowed is surveyed, realizes that the update and adjustment of advance distance are allowed in different sections.
It is to sum up provided by the invention to have to control shield cutter tool wear as the shield driving range prediction method of target
There is clearly reliable implementation process, due to the reliability of research model selection, the authenticity of research means, considers influence factor
Completeness, so that this method process quantifies, clear, simple and practical, low in cost, availability is strong.
Detailed description of the invention
Fig. 1 is shield cutter system partitioning schematic diagram；
Fig. 2 changes functional arrangement with advance distance for each subregion reliability of cutterhead under a certain environmental assessment value；
Fig. 3 is the schematic diagram that certain known engineering-environment assessed value is deduced each subregion reliability by advance distance.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated.
Referring to figures 1-3, a kind of shield driving range prediction method based on shield cutter cutter zone-division LASIK performance, packet
Include following steps:
Step (1): all kinds of environmental factors of shield driving are discussed first, comprising: stratum abrasion and human factor two are big
Index gives a mark to indices, respectively by the size distribution that its Cutter wear influences with weight, the items that add up score,
The environmental assessment value S for finally calculating a consideration shield driving items environmental factor, is explained in detail below it:
A, stratum abrasion
Stratum is characterized for the mill of cutterhead using the rock abrasiveness index (RAI) that Plinninger was proposed in 2002
Corrosion, the index consider stratum body without lateral confinement uniaxial compressive strength (UCS) and equivalent quartz content (EQC) two it is big because
Element is calculated using formula (1):
Wherein: UCS is rock mass without lateral confinement uniaxial compressive strength (MPa), AiFor certain minerals content (%), SiFor mineral
Luo Xiwaer abrasive hardness (be shown in Table 1, Luo Xiwaer abrasive hardness be using quartz as 100 relative value)；
The environmental assessment value S under the influence of the abrasion condition of stratum is determined according to rock abrasiveness index RAIr, it is shown in Table 2.
The S of more than 1 class essential mineral of tableiValue comparison table
2 stratum difference rock abrasiveness index score table of table
B, human factor
Shield driver, which wears away cutterhead as its specialized capability of the operator of shield, very big influence, and shield driver
The length of service can represent to a certain extent shield driver control shield proficiency (propulsive parameter it is reasonable setting, sediment improvement
Selection, emergency of emergency case of parameter etc.).Shield driver quality can be divided into several classes, phase shown in table 3 by its manipulation shield length of service
The environment scoring S answeredpIt is listed in table；
3 shield driver's quality environment grade form of table
The essential environmental factors of shield cutter system wear is influenced based on two classes discussed above, it is believed that above-mentioned environmental index
The weighing factor ratio of Cutter wear is stratum abrasion: human factor=8:2, then final shield driving environmental assessment value S
Formula (4) can be used to be calculated；
S=0.8Sr+0.2Sp (2)
Illustrate: environmental assessment value S ∈ [0,5], wherein the higher influence for illustrating environmental factor to abrasion of score value is more serious.
Step (2): it is directed to a certain specific environment assessed value S condition, statistics shield cutter is in the different cutters for promoting mileage
Abrasion loss at least 5 times.Abrasion loss distribution, which meets normal distribution, density letter, to be thought for the tooling system abrasion loss counted every time
Number is shown in formula (3)；Tool failure distribution, which meets Weibull distribution, to be thought for the tooling system failure conditions counted every time,
Density function is shown in formula (4)；
Wherein: j indicates the different subregions of cutterhead, and i indicates cutter different in same subregion, zijFor under a certain advance distance
The abrasion loss of a certain cutter of certain subregion, μjIt fixes a cutting tool the mean value of abrasion loss for cutterhead region specific under the distance, σjThe region cutter
The variance of abrasion loss；
Wherein: x is the advance distance of shield, and β, λ are two characteristic parameters；
Step (3): since the cutting mileage that the same radial distance of cutterhead is fixed a cutting tool is identical, cutterhead is divided into as radial by interior
And 5 outer concentric circles areas.Because the structure of cutterhead tunneling boring cutting needs, cutterhead is fixed a cutting tool and is not carried out by stringent concentric circles
Arrangement, but the arrangement of Archimedes spiral is used, therefore to the cutter position on cutterhead when cutterhead subregion
It is finely adjusted, guarantees that cutter similar in radial distance is fallen into the same concentric circular regions, as shown in Fig. 1；
Step (4): a certain specific concentric circles subregion on research cutterhead takes it to be counted between tool wear twice at certain and promotes
Abrasion loss data under calculate the mean value of each tool abrasion in subregion, see formula (5), calculate its variance, see formula
(6)；
Wherein:For the variance of tool abrasion in the region,For the mean value of tool abrasion in the region, zijFor
The abrasion loss of certain cutter in the region, m are the number of cutters in the region；
Step (5): choosing tool failure threshold value d (generally d=20mm) referring to correlation engineering experience, by formula (5), public affairs
The calculated result of formula (6) substitutes into formula (3), calculates shield cutter using formula (7) and chooses under each advance distance of survey region
Reliability R；
Step (6): the reliability R under each advance distance x of survey region is found out according to step (5), can solve cutter can
Feature parameter"λ", β in degree calculation formula (8)；
Step (7): since formula (8) are a double-exponential function, for convenient for solving feature parameter"λ", β, formula (8) is taken two
Secondary natural logrithm obtains formula (9), is converted into linear function using variable and parameter method of substitution；
Ln (- ln (R))=β lnx- β ln λ (9)
Enable yi=ln (- ln (R)), xi=lnx, a=β, b=β ln λ, then formula (9) is converted into formula (10):
yi=axi+ b (i=1,2,3,4,5) (10)
With least square method to replacement variable xi、yiProgress scatterplot fitting (at least 5 tool wear situations are measured, therefore altogether
Have at least five point), such as formula (11), formula (12)；
Wherein: i is cutter different in the research subregion, xi、yiBecome for different propulsion mileages by the conversion of linear transfor
Amount, a, b are the linear function undetermined parameter by converting, For xi、yiCorresponding each average value promoted under mileage；Then β=
A,Complete tooling system cutting ability formula of reliability (8) can be acquired；
Step (8): step (2) are repeated and similarly calculate the tooling system cutting ability in other subregions of cutterhead to step (7)
Formula of reliability may finally acquire 5 formula of reliability, such as formula since cutterhead has 5 subregions
(13)；
Step (9): using shield driving mileage x as x-axis, with each subregion tool reliability R of cutterheadjIt is straight that plane is drawn for y-axis
Angular coordinate system, formula (13) is drawn into tooling system cutting ability that rectangular coordinate system in space obtains under the environmental assessment value can
By spending functional image, tooling system cutting ability Reliability Function curve in 5 cutterhead subregions is obtained respectively, such as attached drawing 2；
Step (10): collecting different building-site tool wear data, environmental assessment is carried out to each scene, by step
(1) solve the tool wear Reliability Function group under all kinds of environmental assessment values to step (9), respectively with the advance distance of shield,
The reliability of tooling system, three axis that the environmental assessment value of the shield driving is rectangular coordinate system in space.The numerous letters that will be obtained
Array is drawn into space coordinates, and the function curve under cutterhead subregion varying environment assessed value same in rectangular coordinate system in space is put down
Slip obtains the curved surface group containing 5 three-dimension curved surfaces at curved surface, this curved surface group is that varying environment assessed value bottom tool is reliable
Spend the reference surface group changed with advance distance.
Step (11) can calculate for a certain concrete engineering and learn its environmental assessment value S, the three-dimensional described in step (10)
The corresponding tooling system abrasion Reliability Function curve group found out under the environmental assessment value in space coordinates, according to engineering reality
Need to set the tooling system abrasion reliability value of each subregion on cutterhead, the tooling system of comprehensive 5 curves wears reliability
Value finds out corresponding advance distance in a coordinate system, as considers the maximum shield driving distance value of tooling system reliability, also
Press the calculated recommendation tool changing distance of this method.
For the calculating step of the above-mentioned shield driving range prediction method based on shield cutter cutter zone-division LASIK performance
Need to make following several points explanation:
Illustrate (1): can be potentially encountered research section shield in discussion of the step (1) to formation hardness across multiple and different
The stratum of hardness can take in face of this situation and first individually score each penetrating ground hardness, then respectively pass through ground in basis
Layer length is weighted summation to the scoring on each stratum, and the comprehensive score of stratum abrasion is calculated；
Illustrate (2): for the multiple statistics of step (2) tooling system abrasion loss, abrasion loss should make following determination: first really
After fixed last measurement tool changing on cutterhead each cutter attrition value, measure obtained each tool wear value further according to this, it is poor to make
Between being measured twice as shield driving and caused by tool abrasion (i.e. amount of degradation, Normal Distribution).Such as: certain knife
The tool abrasion that #27 cutter is measured when opening the cabin for the first time on disk is 9mm, and No. #27 is measured during opening the cabin for the second time
The abrasion loss of cutter is 15mm, and tool abrasion is 6mm in the research section；
The shield driving range prediction method based on shield cutter cutter zone-division LASIK performance using the above scheme, and it is existing
There is technology to compare, the technical advantages of the present invention are that:
Advantage (1): studying tool wear using reliability theory, and utilizing with reliability theory is the probability statistics supported
The wear condition of the overall cutter of model comprehensive consideration keeps prediction result more comprehensively reliable.
Advantage (2): carrying out radial subregion to cutterhead, carries out sort research to the cutter of different cutting mileages, avoids " different
The reliability function curve that class abrasion " is obscured research and generated excessively is distorted.
Advantage (3): being contemplated the environmental factor of shield cutter propulsion during studying tool wear, so that research knot
Fruit more has universality and practicability.
Advantage (4): there are the collection products of a different engineering site tool wear situations in the application process of this method
Tired process, can finally draw out and provide the reference surface group of reference for engineering active tool changing range predictions all kinds of under varying environment.
Advantage (5): this method is during predicting advance distance it is contemplated that the abrasion of cutter is gone through compared with the conventional method
History can consider the abrasion condition of its knife disc tool before shield driving starts, calculate its propulsion before knife disc tool can
By degree, corresponding advance distance is solved on corresponding reliability curves, can be predicted under certain tool reliability by formula (15)
Advance distance:
L=l '-l " (15)
Wherein: l is the prediction advance distance for considering tool wear history, and l ' is that original state bottom tool reliability is corresponding
Advance distance, l " are the corresponding advance distance of a certain reliability of cutter in progradation；
Advantage (6): can be pre- according to different section shield cutter running-in wear states and the corresponding change dynamic for promoting environment
The advance distance that each section is allowed is surveyed, realizes that the update and adjustment of advance distance are allowed in different sections.
It is to sum up provided by the invention to have to control shield cutter tool wear as the shield driving range prediction method of target
There is clearly reliable implementation process, due to the reliability of research model selection, the authenticity of research means, considers influence factor
Completeness, so that this method process quantifies, clear, simple and practical, low in cost, availability is strong.
Above-described embodiment is only to clearly demonstrate examples made by the present invention, rather than the restriction to embodiment.For
For those of ordinary skill in the art, other various forms of variations or change can also be made on the basis of the above description
It is dynamic.Here without can not be also exhaustive to all embodiments.And the obvious variation or change thus amplified out
It is dynamic to be still in the protection scope of this invention.
Claims (5)
1. a kind of shield driving range prediction method based on shield cutter cutter zone-division LASIK performance, which is characterized in that including
Following steps:
Step S1: the environment of research section shield driving is considered, determines environmental assessment value；
Step S2: tool abrasion situation of the shield cutter in different advance distances, the cutterhead counted every time under the environment are counted
Tool abrasion distribution and tool failure correspond with normal distribution and Weibull distribution, and calculation formula is as follows；
Wherein: j indicates the different subregions of cutterhead, and i indicates cutter different in same subregion, zijFor certain point under a certain advance distance
The abrasion loss of a certain cutter in area, μjIt fixes a cutting tool the mean value of abrasion loss for cutterhead region specific under the distance, σjIt is specific under the distance
Cutterhead region is fixed a cutting tool the variance of abrasion loss；
Wherein: x is the advance distance of shield, and β, λ are two characteristic parameters；
Step S3: concentric circles subregion is carried out by radial to shield cutter, and dynamic micro-adjustments are carried out to tool position；
Step S4: research cutterhead on a certain specific concentric circles subregion, count the region certain tool wear condition survey twice it
Between abrasion loss, using following formula calculate subregion in each tool abrasion mean value and variance；
Wherein:For the variance of tool abrasion in the region,For the mean value of tool abrasion in the region, zijFor the area
The abrasion loss of a certain cutter in domain, m are the number of cutters in the region；
Step S5: choosing tool failure threshold value d referring to correlation engineering experience, and shield cutter is calculated in normal distyribution function and is chosen
Reliability R of the survey region under different advance distances；
Wherein: zijFor the abrasion loss of a certain cutter of certain subregion on cutterhead under a certain advance distance；
Step S6:, can according to subregion tooling system cutting ability reliability value under different advance distances is calculated in step S5
Solve the calculation formula that subregion tool reliability changes with advance distance；
Wherein: x is the advance distance of shield, and λ, β are that the tooling system cutting ability reliability solved is needed to become with advance distance
Change two characteristic parameters in formula；
Step S7: solving other subregion tooling system cutting ability reliabilitys of cutterhead with the variation formula of advance distance, final
To the function curve group for characterizing same cutterhead different subregions difference tool reliability variation under a certain environment；
Wherein: j indicates different subregions on cutterhead；
Step S8: draw consider advance distance, subregion tool reliability, environmental assessment value rectangular coordinate system in space, by cutterhead
The Reliability Function curve of each subregion is drawn into coordinate system；
Step S9: collecting different building-site tool wear data and carries out environmental assessment to each scene, by step S1 to step
Rapid S8 solves the tool wear Reliability Function group under all kinds of environmental assessment values, this series of functions is drawn into rectangular space coordinate
System, similar functional link obtain a curved surface group at face；
Step S10: its environmental assessment value is calculated for a certain scene, according to the assessed value in the curved surface group that step S9 is drawn
Corresponding response curve group out, can be solved in response curve group according to the practical tooling system reliability needs of engineering mutually should allow for
Shield driving distance.
2. the prediction technique according to claim 1 based on shield cutter cutter zone-division LASIK performance, it is characterised in that: step
Shield driving environmental assessment value S is calculated using the following formula of formula in rapid S1；
S=0.8Sr+0.2Sp
Wherein: SrFor stratum abrasive environments assessed value, SpFor shield driver's quality environmental assessment value.
3. the prediction technique according to claim 2 based on shield cutter cutter zone-division LASIK performance, it is characterised in that: ground
Layer abrasive environments assessed value SrIt is determined by rock abrasiveness index RAI, rock abrasiveness index RAI calculation formula is as follows
It is shown:
Wherein: UCS is rock mass without lateral confinement uniaxial compressive strength, AiFor certain minerals content, SiIt is hard for the Luo Xiwaer grinding of mineral
Degree.
4. the prediction technique according to claim 3 based on shield cutter cutter zone-division LASIK performance, it is characterised in that:
To can be potentially encountered research section shield in the discussion of formation hardness across the stratum of multiple and different hardness in step S1, this is faced
Situation, which can be taken, first individually scores to each penetrating ground hardness, then comments further according to each penetrating ground length each stratum
Divide and be weighted summation, the comprehensive score of stratum abrasion is calculated.
5. the prediction technique according to claim 1 based on shield cutter cutter zone-division LASIK performance, it is characterised in that: step
The multiple statistics of rapid S2 tooling system abrasion loss, abrasion loss make following determine: after last measurement tool changing determining first on cutterhead
The attrition value of each cutter measures obtained each tool wear value further according to this, as difference measured twice between since shield is dug
The tool abrasion in turn resulted in.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111626623A (en) * | 2020-05-29 | 2020-09-04 | 中铁二十局集团第五工程有限公司 | Method for controlling cutter changing of shield machine hob in composite stratum |
| CN114608430A (en) * | 2022-03-18 | 2022-06-10 | 中铁十四局集团大盾构工程有限公司 | Shield machine cutter abrasion real-time detection experiment table and system based on Hall sensor |
| CN114780906A (en) * | 2022-06-21 | 2022-07-22 | 北京城建集团有限责任公司 | Shield tool changing distance measuring and calculating method |
| CN117113573A (en) * | 2023-08-28 | 2023-11-24 | 南京工业大学 | Shield cutter head opening selection method based on engineering case text polarity analysis |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111626623A (en) * | 2020-05-29 | 2020-09-04 | 中铁二十局集团第五工程有限公司 | Method for controlling cutter changing of shield machine hob in composite stratum |
| CN111626623B (en) * | 2020-05-29 | 2022-05-24 | 中铁二十局集团第五工程有限公司 | Cutter changing control method for hob of shield machine in composite stratum |
| CN114608430A (en) * | 2022-03-18 | 2022-06-10 | 中铁十四局集团大盾构工程有限公司 | Shield machine cutter abrasion real-time detection experiment table and system based on Hall sensor |
| CN114608430B (en) * | 2022-03-18 | 2024-01-19 | 中铁十四局集团大盾构工程有限公司 | Real-time detection experiment table and system for cutter abrasion of shield tunneling machine based on Hall sensor |
| CN114780906A (en) * | 2022-06-21 | 2022-07-22 | 北京城建集团有限责任公司 | Shield tool changing distance measuring and calculating method |
| CN117113573A (en) * | 2023-08-28 | 2023-11-24 | 南京工业大学 | Shield cutter head opening selection method based on engineering case text polarity analysis |
| CN117113573B (en) * | 2023-08-28 | 2024-04-05 | 南京工业大学 | Shield cutter head opening selection method based on engineering case text polarity analysis |
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