CN110375913A - A kind of non-built-in type structure health monitoring method of shield tunnel - Google Patents
A kind of non-built-in type structure health monitoring method of shield tunnel Download PDFInfo
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- CN110375913A CN110375913A CN201910664144.XA CN201910664144A CN110375913A CN 110375913 A CN110375913 A CN 110375913A CN 201910664144 A CN201910664144 A CN 201910664144A CN 110375913 A CN110375913 A CN 110375913A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 52
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
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Abstract
A kind of non-built-in type structure health monitoring method of shield tunnel, including measuring and calculating section of jurisdiction arc length changing value of the section of jurisdiction under different stresses for there is the tunnel cross-section of constructional deficiency；For defect section, it is based on section of jurisdiction arc length changing value, the back analysis of internal force is carried out, obtains final internal force diagram；By back analysis as a result, judging whether the section has the necessity monitored for a long time, sensor element is targetedly installed, its structural stress state is monitored for a long time.From the point of view of the permanent health of structure, it is really most dangerous, need most the section that monitors for a long time often construct in because of the defects of damaged caused by a variety of causes, cracking, serious faulting of slab ends section, since construction factor has randomness, these " defect section " positions are difficult to expect, but the present invention then passes through that later period component is pre-buried, accurately can implement to monitor to position that is most dangerous, needing most monitoring.
Description
Technical field
The invention belongs to Tunnel Engineering fields, and in particular to a kind of non-built-in type monitoring structural health conditions side of shield tunnel
Method.
Background technique
Shield tunnel has the advantages that fast speed of application, environmental protection, economy, but its special structure type, and makes its tool
There is the distinguishing feature that overall stiffness is small, non-deformability is weak, easily generation cracking, leakage, transversely deforming are aobvious after surrounding formations disturbance
The diseases such as increase, longitudinal differential settlement are write, various regions are commonplace about the report of all kinds of defect phenomenons of shield tunnel in recent years.
Therefore shield tunnel health monitoring technique is gradually used in the field large-scale popularization, is tried hard to realize and be grown to structure stress situation
Monitoring long, to assess the safe condition in tunnel.
But existing structure health monitoring technique default section before mainly constructing, and in default section pre-buried component into
The monitoring in row later period, thus unavoidably there is the following technical problem for being difficult to overcome:
1) it is difficult to be monitored position that is most dangerous, needing most monitoring.In design, the general geology item according to locating for tunnel
The factors such as part, surrounding enviroment condition, long term planning condition are chosen and think that least favorable, most dangerous section carry out in design process
Monitoring, pre-buried good Water And Earth Pressures, reinforcement stresses, concrete stress etc. test component, on-site consolidation in the section of jurisdiction of the section
After can be monitored.It is really most dangerous, need most the section that monitors for a long time and often construct but from the point of view of the permanent health of structure
It is middle because of damaged caused by a variety of causes, cracking, serious faulting of slab ends equal section (referred to as " defect section "), due to construction factor have with
Machine, these " defect section " positions are difficult to it is anticipated that being thus also difficult to carry out component pre-buried.
2) it is difficult to realize monitor for a long time.The survival rate of pre-buried component is difficult to reach 100%, short (the conventional machine of service life
Tool formula measurement method only 5-10, fiber grating component 15 years or so), and basically can not realize replacement and regeneration.
3) it is difficult to full tunnel monitoring.It for cost reasons, can not be to institute generally only to the pre-buried component of a few section
There is section of jurisdiction all pre-buried.
In addition, in terms of shield tunnel internal force inverting, domestic and international experts and scholars be all made of develop from Tunneling by mining method and
The method based on tunnel clearance convergency value come, this method is more applicable in mountain tunnel, but shield tunnel uses section of jurisdiction
Assembled, during assembly, there are faulting of slab ends, rotation between adjacent section of jurisdiction, thus can not obtain accurate clearance convergence value,
To make segment inner force inversion result, there are maximum errors, are unable to satisfy real requirement.
Summary of the invention
For the technological deficiency for solving existing shield tunnel health monitoring, proposes the present invention and propose a kind of completely new health monitoring side
Method, technical scheme is as follows:
A kind of non-built-in type structure health monitoring method of shield tunnel, the method includes
Step 1, it for there is the tunnel cross-section of constructional deficiency, measures and calculates section of jurisdiction of the section of jurisdiction under different stresses
Arc length changing value；
Step 2, for defect section, it is based on section of jurisdiction arc length changing value, carries out the back analysis of internal force, is obtained final
Internal force diagram；
Step 3, by back analysis as a result, judging whether the section has the necessity monitored for a long time, targetedly
Installation sensor element monitors its structural stress state based on the internal force result of step 2 inverting as initial value for a long time.
Further, step 1 specifically includes:
Obtain the section of jurisdiction arc length L0 under the zero stress state of section of jurisdictioni；After section of jurisdiction after tunnel internal installation, it is selected have it is scarce
Sunken section obtains the section of jurisdiction arc length L1 under section of jurisdiction annular strain stable state in the defect sectioni, pass through L0iAnd L1i,
Calculate section of jurisdiction arc length changing value Δ Li=L1i-L0i；
In the defect section, the section of jurisdiction arc length changing value △ N as caused by axle power N is calculatedi, calculate and led by moment M
The section of jurisdiction arc length changing value △ M of causei, pass through △ NiWith △ MiCalculate section of jurisdiction arc length changing value △i=△ Ni+△
Mi；
Wherein, i indicates the number of section of jurisdiction.
Further, step 2 specifically includes
Pass through △ LiAnd △i, with △ LiAs target value, stablizes the back analysis of stress based on section of jurisdiction annular strain, obtain
Take corresponding moment M, axle power N internal force diagram, the final internal force diagram as inverting.
Further, described to pass through △ LiAnd △i, with △ LiAs target value, stress is stablized based on section of jurisdiction annular strain
Back analysis, obtain corresponding moment M, axle power N internal force diagram, the final internal force diagram as inverting specifically includes:
By material mechanics principle, obtain:
△Ni=Ni*L0i/E/A；
△Mi=0.5*Mi*h*L0i/E/I；
In formula, NiIt is averaged axle power for i-th piece of section of jurisdiction, L0iFor length of i-th piece of section of jurisdiction under zero stress state, E is section of jurisdiction
Modulus of elasticity of concrete, A are section of jurisdiction area；MiIt is averaged moment of flexure for i-th piece of section of jurisdiction, h is section of jurisdiction thickness, and I is that section of jurisdiction section is rigid
Degree；
With the section of jurisdiction arc length changing value △ L of section of jurisdictioniAs target value, by adjusting shield tunnel structure meter repeatedly
The foundation parameter for calculating model makes the changing value △ for calculating gained section of jurisdiction inner surface cambered surface distanceiWith measured value △ LiGradually approach with
It is identical, i.e. ∑ (△i-△Li) 2 when going to zero, obtain corresponding moment M, axle power N internal force diagram, the final internal force as inverting
Figure.
Further, the foundation parameter includes stratum load and ground spring constant.
Further, the shield tunnel structural computational model is inhomogeneous ring model, beam-spring method or shell-bullet
Spring model.
Further, the step 3 specifically includes:
The internal force diagram of the moment M and axle power N that are obtained by the back analysis judges whether the section has permanent monitoring
Necessity specifically if the ratio of the ratio or axle power N of moment M and ultimate bending moment and limit axle power is more than preset value, sentence
The section that breaks has the necessity that monitors for a long time, in the embedded monitoring component of the defect section inner surface, by moment M, axle power N
Initial value of the inverting value as subsequent monitoring, establishes permanent monitoring system；
Further, after subsequent monitoring component is due to life failure, inverting is re-measured, and reacquire corresponding
Moment of flexure, axle power internal force diagram, as internal force initial value, replacement monitoring component continues monitoring.
Further, the method also includes: when segment prefabricated production, every piece of section of jurisdiction inner surface be provided with it is a plurality of with pipe
Plate inner surface arc side is parallel and the identical survey line of radian, the arc length of every survey line are equal to the section of jurisdiction of section of jurisdiction inner surface corresponding position
Arc length, reserves the measurement basic point of high accuracy positioning that is fixed, can saving for a long time on survey line, at least three on every survey line
A measurement basic point, the head end and each measurement basic point of tail end of every survey line, other measurement basic points are located at the head end and tail of survey line
Between end, under the zero stress state of section of jurisdiction, section of jurisdiction arc length of the average arc length of all surveys line of section of jurisdiction i as the section of jurisdiction is calculated
L0i；Defective section is selected, in the defect section, obtains all of the correspondence section of jurisdiction i under section of jurisdiction annular strain stable state
Section of jurisdiction arc length L1 of the average arc length of survey line as the section of jurisdictioni, calculating corresponding section of jurisdiction i by axle power N leads to thereon a plurality of
Arc length changing value △ N of the average value of survey line arc length changing value as the section of jurisdictioni, calculate corresponding section of jurisdiction i is caused by moment M
Section of jurisdiction arc length changing value △ M of the average value of a plurality of survey line arc length changing value thereon as the section of jurisdictioni。
Further, pass through laser range finder, three-dimensional laser scanner, the linear strain of stickup or displacement sensor pipe
The survey line arc length of piece
The invention has the following advantages:
The advantage of the present invention compared with the prior art is mainly reflected in:
(1) from the point of view of the permanent health of structure, it is really most dangerous, need most the section that monitors for a long time often construct in because respectively
The defects of planting breakage, cracking, serious faulting of slab ends caused by reason section, since construction factor has randomness, " defect is disconnected for these
Face " position is difficult to expect.But it is pre-buried that the present invention then passes through later period component, can accurately to it is most dangerous, need most monitoring
Implement monitoring in position.
(2) later period of the invention pre-buried component high survival rate, and replacement can be implemented in the operation phase, is realized and the structure longevity
Order same monitoring cycle.
(3) present invention can realize that displacement measurement point is reserved in all sections of jurisdiction by lesser cost, have and increase prison at any time
It surveys or the condition of whole monitoring, monitoring scheme implementation is more flexible.
(4) precision for the internal force and Monitoring Result that the present invention obtains is high, conventionally by the progress of tunnel clearance convergency value
Power inversion error is big, and the interior force value that pre-buried mode obtains is not that internal force maximum value (only has 1-2 measurement base in general every piece of section of jurisdiction yet
Point, thus measured result is not necessarily internal force maximum value), the present invention can be obtained in accurately by arc length changing value inverting
Try hard to, can also obtain internal force maximum value.
Detailed description of the invention
Fig. 1 is a kind of process of the non-built-in type structure health monitoring method of shield tunnel provided in an embodiment of the present invention
Figure；
Fig. 2 is rings survey point set aside pre-embedded figure provided in an embodiment of the present invention and section of jurisdiction arc length schematic diagram；
Fig. 3 is the section of jurisdiction ring structure figure after assembly provided in an embodiment of the present invention；
Fig. 4 is inhomogeneous ring model provided in an embodiment of the present invention and load resisting systems schematic diagram；
Fig. 5 is beam-spring method schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only present invention a part, instead of all the embodiments.Based on the present invention
In embodiment, all other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
As shown in Figure 1, the non-built-in type structure health monitoring method of a kind of shield tunnel provided in an embodiment of the present invention, institute
The method of stating includes
Step 1, it for there is the tunnel cross-section of constructional deficiency, measures and calculates section of jurisdiction of the section of jurisdiction under different stresses
Arc length changing value；
Step 2, for defect section, it is based on section of jurisdiction arc length changing value, carries out the back analysis of internal force, is obtained final
Internal force diagram；
Step 3, by back analysis as a result, judging whether the section has the necessity monitored for a long time, targetedly
Installation sensor element monitors its structural stress state based on the internal force result of step 2 inverting as initial value for a long time.
Preferably, step 1 specifically includes:
Obtain the section of jurisdiction arc length L0 under the zero stress state of section of jurisdictioni；After section of jurisdiction after tunnel internal installation, it is selected have it is scarce
Sunken section obtains the section of jurisdiction arc length L1 under section of jurisdiction annular strain stable state in the defect sectioni, pass through L0iAnd L1i,
Calculate section of jurisdiction arc length changing value Δ Li=L1i-L0i；
In the defect section, the section of jurisdiction arc length changing value △ N as caused by axle power N is calculatedi, calculate and led by moment M
The section of jurisdiction arc length changing value △ M of causei, pass through △ NiWith △ MiCalculate section of jurisdiction arc length changing value △i=△ Ni+△
Mi；
Wherein, i indicates the number of section of jurisdiction.
Wherein, the section for situations such as defect section is in the presence of breakage, cracking, serious faulting of slab ends.
In above-described embodiment, section of jurisdiction can occur shape under axle power N, moment M, shearing Q effect and change, for shield method tunnel
Road, the deformation for shearing generation can be ignored, and can only be included in the influence of axle power, moment of flexure, and axle power makes it generate compressive deformation,
Reduce section of jurisdiction arc length, correspondingly, the distance change value △ N generated by axle poweriAlways negative value, moment of flexure be divided into sagging moment and
Hogging moment, sagging moment make section of jurisdiction generate opening deformation, and section of jurisdiction arc length can increase, and hogging moment is then conversely, by moment of flexure generation
Distance change value is calculated as △ Mi, may be positive value, it is also possible to and it is negative value, if: △i>=0, then sagging moment is born in section of jurisdiction；△i﹤ 0,
Then section of jurisdiction receiving hogging moment or lesser sagging moment, a large amount of calculating and actual measurement show same endless tube piece, and generally there are two sagging moments
Area and two hogging moment areas after being calculated by the deformation to each piece of section of jurisdiction, can substantially obtain sagging moment area and bear curved
Square area.
Tunnel segment structure, Fig. 3 show the section of jurisdiction ring structure after assembly as shown in Figure 2.
Preferably, the method for calculating section of jurisdiction arc length under various states is specific as follows:
As shown in Fig. 2, the inner surface of the section of jurisdiction is cambered surface, there are two parallel straight flanges and two parallel arc sides,
In segment prefabricated production, every piece of section of jurisdiction inner surface is provided with a plurality of identical survey of parallel and radian with section of jurisdiction inner surface arc side
Line, the arc length of every survey line are equal to the section of jurisdiction arc length of section of jurisdiction inner surface corresponding position, reserved on survey line 1 it is fixed,
The measurement basic point 2 for the high accuracy positioning that can be saved for a long time, at least three measurement basic points 2, measure 2 shape of basic point on every survey line 1
Cheng Hou can measure the survey of section of jurisdiction by laser range finder, three-dimensional laser scanner, the linear strain of stickup or displacement sensor etc.
1 arc length of line is existing by laser range finder, three-dimensional laser scanner, the linear strain of stickup or displacement sensor distance
There is technology, there are many method of existing measurement distance, and the present invention includes but is not limited to measuring tool and method mentioned above.It is logical
Crossing multiple measurement basic points 2 can be improved the accuracy of measurement, and measurement accuracy should be controlled in 0.1mm hereinafter, using 3 D laser scanning
When instrument scanning imaging technology, it can not also reserve or the pre-buried measurement basic point 2.Each survey of the head end and tail end of survey line 1
Basic point 2 is measured, then the arc length between the measurement basic point 2 at 1 head and the tail both ends of survey line is the arc length of the section of jurisdiction, in section of jurisdiction zero stress
Under state, the average arc length of all surveys line 1 of section of jurisdiction i is calculated as section of jurisdiction arc length L0i；Section of jurisdiction tunnel internal installation after,
Defective section is selected, in the defect section, obtains all surveys line 1 of the correspondence section of jurisdiction i under section of jurisdiction annular strain stable state
Average arc length as section of jurisdiction arc length L1i, calculate corresponding section of jurisdiction i causes 1 arc length of a plurality of survey line thereon to change by axle power N
The average value of value is as arc length changing value △ Ni, calculate and section of jurisdiction i answered to cause 1 arc length of a plurality of survey line thereon to become by moment M
The average value of change value is as section of jurisdiction arc length changing value △ Mi。
Wherein, measurement basic point 2 includes but is not limited to that the modes such as pre-buried steel pricker, reserved sags and crests, smearing paint are implemented.
Preferably, step 2 specifically includes
Pass through △ LiAnd △i, with △ LiAs target value, stablizes the back analysis of stress based on section of jurisdiction annular strain, obtain
Take corresponding moment M, axle power N internal force diagram, the final internal force diagram as inverting.
It is described to pass through △ L in above-mentioned implementationiAnd △i, with △ LiAs target value, stress shape is stablized based on section of jurisdiction annular strain
The back analysis of state obtains corresponding moment M, axle power N internal force diagram, and the final internal force diagram as inverting specifically includes:
By material mechanics principle, it is easy to obtain:
△Ni=Ni*L0i/E/A；
△Mi=0.5*Mi*h*L0i/E/I；
In formula, NiIt is averaged axle power for i-th piece of section of jurisdiction, L0iFor length of i-th piece of section of jurisdiction under zero stress state, E is section of jurisdiction
Modulus of elasticity of concrete, A are section of jurisdiction area；MiIt is averaged moment of flexure for i-th piece of section of jurisdiction, h is section of jurisdiction thickness, and I is that section of jurisdiction section is rigid
Degree；
With the section of jurisdiction arc length changing value △ L of section of jurisdictioniAs target value, by adjusting shield tunnel structure meter repeatedly
The foundation parameter for calculating model makes the changing value △ for calculating gained section of jurisdiction inner surface cambered surface distancei (△i=△ Ni+△Mi) and it is real
Measured value △ LiGradually approach with it is identical, specific method can be using least square method, i.e. ∑ (△i-△Li) 2 when going to zero, obtain
Corresponding moment M, axle power N internal force diagram, the final internal force diagram as inverting.
Wherein, the foundation parameter includes the parameters such as stratum load, ground spring constant；The shield tunnel structure meter
Calculation model is inhomogeneous ring model, beam-spring method or shell-spring model, the inhomogeneous ring model and load resisting systems such as Fig. 4
It is shown, the beam-spring method as shown in figure 5, wherein carry and the same Fig. 4 of ground spring.
Preferably, the step 3 specifically includes:
The internal force diagram of the moment M and axle power N that are obtained by the back analysis judges whether the section has permanent monitoring
Necessity specifically if the ratio of the ratio or axle power N of moment M and ultimate bending moment and limit axle power is more than preset value, sentence
The section break with the necessity monitored for a long time, buries monitoring component, generally fiber grating in the defect section inner surface,
Using moment M, axle power N inverting value as the initial value of subsequent monitoring, establish permanent monitoring system；
After subsequent monitoring component is due to life failure, according to the method described above, inverting, and reacquisition pair are re-measured
The moment of flexure answered, axle power internal force diagram, as internal force initial value, replacement monitoring component continues monitoring.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of non-built-in type structure health monitoring method of shield tunnel, which is characterized in that the method includes
Step 1, it for there is the tunnel cross-section of constructional deficiency, measures and calculates section of jurisdiction cambered surface of the section of jurisdiction under different stresses
Length varying value；
Step 2, for defect section, it is based on section of jurisdiction arc length changing value, the back analysis of internal force is carried out, obtains final internal force
Figure；
Step 3, it by back analysis as a result, judge whether the section has the necessity monitored for a long time, targetedly installs
Sensor element monitors its structural stress state for a long time.
2. the non-built-in type structure health monitoring method of shield tunnel according to claim 1, which is characterized in that step 1
It specifically includes:
Obtain the section of jurisdiction arc length L0 under the zero stress state of section of jurisdictioni；After section of jurisdiction after tunnel internal installation, select defective
Section obtains the section of jurisdiction arc length L1 under section of jurisdiction annular strain stable state in the defect sectioni, pass through L0iAnd L1i, calculate
Section of jurisdiction arc length changing value Δ L outi=L1i-L0i；
In the defect section, the section of jurisdiction arc length changing value △ N as caused by axle power N is calculatedi, calculate and managed as caused by moment M
Piece arc length changing value △ Mi, pass through △ NiWith △ MiCalculate section of jurisdiction arc length changing value △i=△ Ni+△Mi；
Wherein, i indicates the number of section of jurisdiction.
3. the non-built-in type structure health monitoring method of shield tunnel according to claim 2, which is characterized in that step 2
It specifically includes
Pass through △ LiAnd △i, with △ LiAs target value, stablize the back analysis of stress, acquisition pair based on section of jurisdiction annular strain
The moment M answered, axle power N internal force diagram, the final internal force diagram as inverting.
4. the non-built-in type structure health monitoring method of shield tunnel according to claim 3, which is characterized in that described logical
Cross △ LiAnd △i, with △ LiAs target value, stablize the back analysis of stress based on section of jurisdiction annular strain, obtains corresponding curved
Square M, axle power N internal force diagram, the final internal force diagram as inverting specifically include:
By material mechanics principle, obtain:
△Ni=Ni*L0i/E/A；
△Mi=0.5*Mi*h*L0i/E/I；
In formula, NiIt is averaged axle power for i-th piece of section of jurisdiction, L0iFor length of i-th piece of section of jurisdiction under zero stress state, E is section of jurisdiction coagulation
Native elasticity modulus, A are section of jurisdiction area；MiIt is averaged moment of flexure for i-th piece of section of jurisdiction, h is section of jurisdiction thickness, and I is section of jurisdiction section rigidity；
With the section of jurisdiction arc length changing value △ L of section of jurisdictioniAs target value, by adjusting shield tunnel Structure Calculation mould repeatedly
The foundation parameter of type makes the changing value △ for calculating gained section of jurisdiction inner surface cambered surface distanceiWith measured value △ LiGradually approach and phase
Together, i.e. ∑ (△i-△Li) 2 when going to zero, obtain corresponding moment M, axle power N internal force diagram, the final internal force diagram as inverting.
5. the non-built-in type structure health monitoring method of shield tunnel according to claim 4, which is characterized in that describedly
Base parameter includes stratum load and ground spring constant.
6. the non-built-in type structure health monitoring method of shield tunnel according to claim 4, which is characterized in that the shield
Structure method tunnel structure computation model is inhomogeneous ring model, beam-spring method or shell-spring model.
7. the non-built-in type structure health monitoring method of shield tunnel according to claim 1, which is characterized in that the step
Rapid 3 specifically include:
The internal force diagram of the moment M and axle power N that are obtained by the back analysis judge the section whether have monitor for a long time must
The property wanted, specifically, if the ratio or axle power N of moment M and ultimate bending moment and the ratio of limit axle power are more than preset value, judgement should
Section has the necessity monitored for a long time, in the embedded monitoring component of the defect section inner surface, by moment M, the inverting of axle power N
It is worth the initial value as subsequent monitoring, establishes permanent monitoring system.
8. the non-built-in type structure health monitoring method of shield tunnel according to claim 7, which is characterized in that when subsequent
After component is monitored due to life failure, inverting is re-measured, to reacquire corresponding moment of flexure, axle power internal force diagram, as interior
Power initial value, replacement monitoring component continue monitoring.
9. the non-built-in type structure health monitoring method of shield tunnel according to claim 2, which is characterized in that the side
Method further include: when segment prefabricated production, every piece of section of jurisdiction inner surface is provided with a plurality of parallel and radian with section of jurisdiction inner surface arc side
Identical survey line, the arc length of every survey line are equal to the section of jurisdiction arc length of section of jurisdiction inner surface corresponding position, reserve on survey line solid
The measurement basic point of high accuracy positioning that is fixed, can saving for a long time, at least three measurement basic points on every survey line, every survey line
Head end and each measurement basic point of tail end, other measurement basic points are located between the head end and tail end of survey line, in section of jurisdiction zero stress shape
Under state, section of jurisdiction arc length L0 of the average arc length of all surveys line of section of jurisdiction i as the section of jurisdiction is calculatedi；Defective section is selected,
In the defect section, the average arc length of all surveys line of the correspondence section of jurisdiction i under section of jurisdiction annular strain stable state is obtained as the pipe
The section of jurisdiction arc length L1 of piecei, calculating corresponding section of jurisdiction i is led to the average value of a plurality of survey line arc length changing value thereon by axle power N
Arc length changing value △ N as the section of jurisdictioni, calculate corresponding section of jurisdiction i causes a plurality of survey line arc length thereon to change by moment M
Section of jurisdiction arc length changing value △ M of the average value of value as the section of jurisdictioni。
10. the non-built-in type structure health monitoring method of shield tunnel according to claim 9, which is characterized in that pass through
Laser range finder, three-dimensional laser scanner, the survey line arc length for pasting linear strain or displacement sensor section of jurisdiction.
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