CN110414184A - A kind of stage division and system suitable for the uneven large deformation of soft rock tunnel - Google Patents
A kind of stage division and system suitable for the uneven large deformation of soft rock tunnel Download PDFInfo
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- CN110414184A CN110414184A CN201910748458.8A CN201910748458A CN110414184A CN 110414184 A CN110414184 A CN 110414184A CN 201910748458 A CN201910748458 A CN 201910748458A CN 110414184 A CN110414184 A CN 110414184A
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- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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Abstract
The present disclosure proposes a kind of stage divisions and system suitable for the uneven large deformation of soft rock tunnel, include: that size scanning is carried out to the section after the section and preliminary bracing stabilization before Tunnel, tunnel cross-section overall deformation is determined according to the size difference before and after section；Based on tunnel cross-section overall deformation, abnormal deformation and abnormal deformation section are defined, deformation section further is divided to section；Tunnel is calculated for deformation section be averaged relative deformation and deformation nonuniformity coefficient, and relative deformation be averaged according to tunnel and deformation nonuniformity coefficient is classified as foundation deformation grade and the uneven grade of deformation to by the uneven large deformation of soft rock tunnel.This method carries out the uneven large deformation classification of soft rock tunnel and as a result accurately and reliably destroys the research of problem to the uneven large deformation of soft rock tunnel, have specific aim and science according to tunnel integrated facticity, complete deformation data.
Description
Technical field
This disclosure relates to soft rock tunnel technical field, more particularly to a kind of suitable for the uneven large deformation of soft rock tunnel
Stage division and system.
Background technique
With the continuous development of China's economy in order to meet the growing transport need of people, more and more high speeds
Highway, railway are put among construction.Highway, railway mostly use constructing tunnel scheme when passing through mountain terrain.Work as chance
Poor to geological environment, Surrounding Rock Strength is low, rock crushing, and especially ROCK MASS JOINT, stratification are easily produced compared with the Soft Rock Area of development
Raw local plastic deformation, tunnel integrally generates uneven large deformation, leads to tunnel support structure local failure, to working security
It causes to seriously threaten.
Inventor has found that tunnel deformation classification can carry out qualitative evaluation to deformation under study for action, destroys for tunnel deformation
Prevention and treatment provides foundation, but previous deformation stage division is mainly according to the deformation behaviour value of tunnel cross-section local location, including arch
Top sink deformation, under lead convergent deformation and on lead convergent deformation, and do not consider the deformation of tunnel entirety, and to tunnel deformation
The research of degree of irregularity is also rarely found.
Large deformation tunnel uneven for soft rock, it is necessary first to foundation deformation grade is obtained, so that it is determined that and optimizing tunnel
Whole foundation supporting intensity, secondly, also needing to obtain abnormal deformation degree, so that it is determined that the method for protecting support in abnormal deformation region
And supporting intensity.It is obvious that traditional deformation stage division, is difficult to provide and targetedly apply to the uneven large deformation of soft rock tunnel
Work reference.
Therefore, how the uneven large deformation of soft rock tunnel to be carried out using acquisition deformation monitoring metric data in constructing tunnel
Accurately classification and qualitative evaluation, and providing specific aim scheme for soft rock tunnel construction and supporting is urgent problem.
Summary of the invention
The purpose of this specification embodiment is to provide a kind of stage division suitable for the uneven large deformation of soft rock tunnel,
According to tunnel integrated facticity, complete deformation data, the uneven large deformation classification of soft rock tunnel is carried out, it is as a result accurately and reliably, right
The uneven large deformation of soft rock tunnel destroys the processing of problem, has specific aim and science.
This specification embodiment provides a kind of stage division suitable for the uneven large deformation of soft rock tunnel, by following
Technical solution is realized:
Include:
Size scanning is carried out to the section after the section and preliminary bracing stabilization before Tunnel, according to section
The size difference of front and back determines tunnel cross-section overall deformation；
Based on tunnel cross-section overall deformation, abnormal deformation and abnormal deformation section are defined, further section is divided and is become
Shape section；
For deformation section calculate tunnel be averaged relative deformation and deformation nonuniformity coefficient, and according to tunnel averagely it is opposite
Deflection and deformation nonuniformity coefficient are classified as foundation deformation grade and deformation unevenly to by the uneven large deformation of soft rock tunnel
Grade.
Further technical solution determines deformation curve function based on tunnel cross-section overall deformation, the deformation curve letter
Number, using the deformation values of corresponding position as dependent variable, acquires tunnel using the deformation curve function using tunnel circumferential direction length as independent variable
The average deformation amount of road entirety.
Further technical solution, utilizes formulaThe average deformation amount of tunnel entirety is acquired, wherein
For the average deformation amount of tunnel entirety, L is tunnel circumferential direction total length, and q (l) is using tunnel circumferential direction length as independent variable, with correspondence
The deformation values of position are dependent variable, determining deformation curve function.
Further technical solution, the actual overall deformation of tunnel cross-section are more than the setting of tunnel ensemble average deflection
When percentage, as abnormal deformation, where section be abnormal deformation section.
Tunnel cross-section is divided into multiple representative changes according to whether being abnormal deformation by further technical solution
Shape section, the quantity for dividing section determine as the case may be.
Further technical solution calculates the average deformation amount of each section for each tunnel section, flat based on each section
Equal deflection acquires tunnel again and is averaged relative deformation, and foundation deformation is divided into multiple grades according to average relative deformation.
Further technical solution, the average deformation amount calculation formula of each section:WhereinIt is i-th
The average deformation amount of section, liFor the circumferential length of the i-th section, qiIt (l) is using the i-th section circumferential direction length as independent variable, with correspondence
The deformation values of position are dependent variable, determining deformation curve function.
Further technical solution, tunnel are averaged relative deformation's calculation formula are as follows:
WhereinIt is averaged relative deformation for tunnel, D is tunnel span, that is, tunnel cross-section maximum width, and L is tunnel ring
To total length,For the average deformation amount of the i-th section, liFor the circumferential length of the i-th section.
Further technical solution, utilizes formulaDeformation nonuniformity coefficient is calculated, wherein ξ is that deformation is uneven
Coefficient,For the average deformation amount of i-th of abnormal deformation section,For the average deformation amount of the i-th section, liFor the i-th section
Circumferential length,For the circumferential length of i-th of abnormal deformation section；
According to deformation nonuniformity coefficient, deformation degree of irregularity is divided into multiple grades.
This specification embodiment provides a kind of hierarchy system suitable for the uneven large deformation of soft rock tunnel, by following
Technical solution is realized:
Including tunnel cross-section instrument and data processing equipment, tunnel cross-section instrument is to the section and initial stage branch before Tunnel
Section after protecting stabilization carries out size scanning, and the data after scanning are transmitted to data processing equipment, and data processing is set
It is standby to be configured as:
Tunnel cross-section overall deformation is determined according to the size difference before and after section；
Based on tunnel cross-section overall deformation, abnormal deformation and abnormal deformation section are defined, further section is divided and is become
Shape section；
For deformation section calculate tunnel be averaged relative deformation and deformation nonuniformity coefficient, and according to tunnel averagely it is opposite
Deflection and deformation nonuniformity coefficient are classified as foundation deformation grade and deformation unevenly to by the uneven large deformation of soft rock tunnel
Grade.
It shows equipment, the classification results of data processing equipment is shown.
Compared with prior art, the beneficial effect of the disclosure is:
1, this method is directed to the uneven large deformation classification problems of soft rock tunnel, using tunnel cross-section instrument, to tunnel initial-stage branch
Section after section and preliminary bracing stabilization before shield carries out size scanning, passes through the mathematical statistics sum number to scan data
Value calculates, and obtains soft rock tunnel section overall deformation, defines abnormal deformation and abnormal deformation section, further divides to section
Section is deformed, tunnel is calculated and be averaged and relative deformation and deform nonuniformity coefficient, and is averaged relative deformation and change according to tunnel
Shape nonuniformity coefficient is classified as foundation deformation grade and the uneven grade of deformation to by the uneven large deformation of soft rock tunnel, thus right
Soft rock tunnel inhomogeneous deformation degree carries out qualitative evaluation.This method is carried out according to tunnel integrated facticity, complete deformation data
As a result accurately and reliably the uneven large deformation classification of soft rock tunnel destroys the research of problem, tool to the uneven large deformation of soft rock tunnel
It is targetedly and scientific.
2, this stage division can be used for the supporting optimum of the uneven large deformation of soft rock tunnel.If foundation deformation grade mistake
Greatly, corresponding to increase foundation supporting intensity according to grade size, if uneven grade is excessive, according to grade size, to exception
Deformed region carries out the supporting of respective degrees, and preferably control deformation improves construction safety and efficiency.Therefore, this method is to soft
The design and construction in the uneven large deformation tunnel of rock have great practical value.
Detailed description of the invention
The Figure of description for constituting a part of this disclosure is used to provide further understanding of the disclosure, and the disclosure is shown
Meaning property embodiment and its explanation do not constitute the improper restriction to the disclosure for explaining the disclosure.
Fig. 1 is the evaluation procedure flow chart of embodiment of the present disclosure；
Fig. 2 is tunnel cross-section instrument operation schematic diagram before the preliminary bracing of embodiment of the present disclosure；
Fig. 3 be embodiment of the present disclosure preliminary bracing stabilization after tunnel cross-section instrument operation schematic diagram；
Fig. 4 is the tunnel deformation multi-session partition schematic diagram of embodiment of the present disclosure；
Wherein, 1- tunnel cross-section instrument, the section before 2- preliminary bracing, the section after 3- preliminary bracing stabilization, 4- tunnel
Road normal deformation boundary (deforming more than this boundary is abnormal deformation, is no more than as normal deformation), 5- normal deformation section
(1), 6- abnormal deformation section (one), 7- normal deformation section (two), 8- abnormal deformation section (two), 9- normal deformation section
(3).
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Examples of implementation one
As described in background technique, soft rock tunnel generates uneven large deformation, causes tunnel support structure locally broken
It is bad, working security is caused to seriously threaten.Tunnel deformation classification can carry out qualitative analysis to deformation, destroy for tunnel deformation
Prevention and treatment provides foundation.Therefore, how soft rock tunnel unevenly to be become greatly using acquisition deformation monitoring metric data in constructing tunnel
Shape is accurately classified and qualitative evaluation, and providing specific aim scheme for soft rock tunnel construction and supporting is urgently to be solved ask
Topic.
This embodiment disclose a kind of stage divisions suitable for the uneven large deformation of soft rock tunnel, utilize tunnel cross-section
Instrument carries out size scanning to the section after the section and preliminary bracing stabilization before Tunnel, by scanning number
According to mathematical statistics and numerical value calculate, obtain soft rock tunnel section overall deformation, define abnormal deformation and abnormal deformation section,
Further to section divide deformation section, calculate tunnel be averaged relative deformation and deformation nonuniformity coefficient, and according to tunnel put down
Equal relative deformation and deformation nonuniformity coefficient are classified as foundation deformation grade and deformation to by the uneven large deformation of soft rock tunnel
Uneven grade proposes a kind of suitable for soft rock tunnel to carry out qualitative evaluation to soft rock tunnel inhomogeneous deformation degree
The stage division of uneven large deformation.It is uneven to carry out soft rock tunnel according to tunnel integrated facticity, complete deformation data for this method
As a result accurately and reliably even large deformation classification destroys the processing of problem to the uneven large deformation of soft rock tunnel, have specific aim and section
The property learned.
Referring specifically to as shown in Fig. 1 and Fig. 2-3, specifically include:
(1) tunnel cross-section instrument 1 is utilized, to the section 3 after the section 2 and preliminary bracing stabilization before Tunnel
Size scanning is carried out, tunnel cross-section overall deformation is determined according to the size difference before and after section；
(2) according to tunnel practical distortion value, formula is utilized:Acquire the average deformation amount of tunnel entirety.
WhereinFor the average deformation amount of tunnel entirety, L is tunnel circumferential direction total length, q (l) be using tunnel circumferential direction length as independent variable,
Using the deformation values of corresponding position as dependent variable, determining deformation curve function.Deflection is more than tunnel ensemble average deflection
When 20%, as abnormal deformation, where section be abnormal deformation section.
Referring specifically to shown in attached drawing 4, tunnel normal deformation boundary 4, deforming more than this boundary is abnormal deformation, is no more than
As normal deformation passes through the tunnel normal deformation boundary 4, it can be deduced that there are normal deformation sections (one) 5 in tunnel, abnormal to become
Shape section (one) 6, normal deformation section (two) 7, abnormal deformation section (two) 8, normal deformation section (three) 9.
(3) according to whether being abnormal deformation, tunnel cross-section is divided into multiple representative deformation sections, divides section
Quantity determine as the case may be.The average deformation amount calculation formula of each section:WhereinFor the i-thth area
The average deformation amount of section, liFor the circumferential length of the i-th section, qiIt (l) is using the i-th section circumferential direction length as independent variable, to correspond to position
The deformation values set are dependent variable, determining deformation curve function.
(4) the average deformation amount acquired according to each tunnel section, uses formulaTunnel is acquired to be averaged relative deformation
Amount.WhereinIt is averaged relative deformation for tunnel, D is tunnel span (maximum width of tunnel cross-section).
(5) according to average relative deformation, foundation deformation is divided into I, II, III, IV, V 5 grade, as shown in table 1.
1 foundation deformation hierarchical table of table
(6) formula is utilizedDeformation nonuniformity coefficient is calculated, wherein ξ is deformation nonuniformity coefficient,It is i-th
The average deformation amount of abnormal deformation section,For the circumferential length of i-th of abnormal deformation section.
(7) according to deformation nonuniformity coefficient, deformation degree of irregularity is divided into I, II, III, IV 4 grade, such as 2 institute of table
Show.
Table 2 deforms uneven hierarchical table
This stage division is suitable for the classification of the uneven large deformation of soft rock tunnel, including soft rock tunnel section overall deformation
Acquisition, the definition of soft rock tunnel section abnormal deformation, the division of soft rock tunnel cross section deformation section, average relative deformation's
It calculates, the division of foundation deformation grade deforms the calculating of nonuniformity coefficient, deforms the division of uneven grade.It can be used for soft rock
The supporting optimum of the uneven large deformation in tunnel takes the supporting optimum of corresponding grade to arrange according to the size of prediction of distortion grade
It applies.It is corresponding to increase tunnel basis supporting intensity according to grade size if foundation deformation grade is excessive, if uneven etc.
Grade is excessive, and according to grade size, the supporting of respective degrees is carried out to tunnel abnormal deformation region, and preferably control deformation improves
Construction safety and efficiency.Therefore, this method has very big practical valence to the design and construction in the uneven large deformation tunnel of soft rock
Value.
Examples of implementation two
This specification embodiment provides a kind of hierarchy system suitable for the uneven large deformation of soft rock tunnel, by following
Technical solution is realized:
Including tunnel cross-section instrument and data processing equipment, tunnel cross-section instrument is to the section and initial stage branch before Tunnel
Section after protecting stabilization carries out size scanning, and the data after scanning are transmitted to data processing equipment, and data processing is set
It is standby to be configured as:
Tunnel cross-section overall deformation is determined according to the size difference before and after section；
Based on tunnel cross-section overall deformation, abnormal deformation and abnormal deformation section are defined, further section is divided and is become
Shape section；
For deformation section calculate tunnel be averaged relative deformation and deformation nonuniformity coefficient, and according to tunnel averagely it is opposite
Deflection and deformation nonuniformity coefficient are classified as foundation deformation grade and deformation unevenly to by the uneven large deformation of soft rock tunnel
Grade.
It shows equipment, the classification results of data processing equipment is shown.
The data processing equipment can be realized the electricity of the calculation processing to data for computer, server, processor etc.
The relevant equipment of son.
The data processing equipment related calculate during being classified is fitted referring to one of examples of implementation one
For the stage division of the uneven large deformation of soft rock tunnel, no longer it is specifically described herein.
It is understood that in the description of this specification, reference term " embodiment ", " another embodiment ", " other
The description of embodiment " or " first embodiment~N embodiment " etc. means specific spy described in conjunction with this embodiment or example
Sign, structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned
The schematic representation of term may not refer to the same embodiment or example.Moreover, the specific features of description, structure, material
Person's feature can be combined in any suitable manner in any one or more of the embodiments or examples.
The foregoing is merely preferred embodiment of the present disclosure, are not limited to the disclosure, for the skill of this field
For art personnel, the disclosure can have various modifications and variations.It is all within the spirit and principle of the disclosure, it is made any to repair
Change, equivalent replacement, improvement etc., should be included within the protection scope of the disclosure.
Claims (10)
1. a kind of stage division suitable for the uneven large deformation of soft rock tunnel, characterized in that include:
Size scanning is carried out to the section after the section and preliminary bracing stabilization before Tunnel, according to before and after section
Size difference determine tunnel cross-section overall deformation；
Based on tunnel cross-section overall deformation, abnormal deformation and abnormal deformation section are defined, deformed area further is divided to section
Section；
Tunnel is calculated for deformation section be averaged and relative deformation and deform nonuniformity coefficient, and is averaged relative deformation according to tunnel
Amount and deformation nonuniformity coefficient are classified as foundation deformation grade and the uneven grade of deformation to by the uneven large deformation of soft rock tunnel.
2. a kind of stage division suitable for the uneven large deformation of soft rock tunnel as described in claim 1, characterized in that be based on
Tunnel cross-section overall deformation determines deformation curve function, and the deformation curve function is using tunnel circumferential direction length as independent variable, with right
The deformation values for answering position are dependent variable, and the average deformation amount of tunnel entirety is acquired using the deformation curve function.
3. a kind of stage division suitable for the uneven large deformation of soft rock tunnel as claimed in claim 2, characterized in that utilize
FormulaThe average deformation amount of tunnel entirety is acquired, whereinFor the average deformation amount of tunnel entirety, L is tunnel
Road circumferential direction total length, q (l) be using tunnel circumferential direction length as independent variable, using the deformation values of corresponding position as dependent variable, determining change
Shape curvilinear function.
4. a kind of stage division suitable for the uneven large deformation of soft rock tunnel as claimed in claim 2, characterized in that tunnel
When the actual overall deformation of section is more than the setting percentage of tunnel ensemble average deflection, as abnormal deformation, where
Section be abnormal deformation section.
5. a kind of stage division suitable for the uneven large deformation of soft rock tunnel as claimed in claim 4, characterized in that according to
Whether it is abnormal deformation, tunnel cross-section is divided into multiple representative deformation sections, divides the quantity of section according to specific
Situation determines.
6. a kind of stage division suitable for the uneven large deformation of soft rock tunnel as claimed in claim 5, characterized in that for
Each tunnel section calculates the average deformation amount of each section, and the average deformation amount based on each section acquires the average opposite change in tunnel again
Foundation deformation is divided into multiple grades according to average relative deformation by shape amount.
7. a kind of stage division suitable for the uneven large deformation of soft rock tunnel as claimed in claim 6, characterized in that each area
The average deformation amount calculation formula of section:WhereinFor the average deformation amount of the i-th section, liFor the i-th section
Circumferential length, qiIt (l) is, using the deformation values of corresponding position as dependent variable, to be determined using the i-th section circumferential direction length as independent variable
Deformation curve function.
8. a kind of stage division suitable for the uneven large deformation of soft rock tunnel as claimed in claim 6, characterized in that tunnel
Average relative deformation's calculation formula are as follows:
WhereinIt is averaged relative deformation for tunnel, D is tunnel span, that is, tunnel cross-section maximum width, and L is tunnel circumferential direction overall length
Degree,For the average deformation amount of the i-th section, liFor the circumferential length of the i-th section.
9. a kind of stage division suitable for the uneven large deformation of soft rock tunnel as claimed in claim 8, characterized in that utilize
FormulaDeformation nonuniformity coefficient is calculated, wherein ξ is deformation nonuniformity coefficient,For the flat of i-th abnormal deformation section
Equal deflection,For the average deformation amount of the i-th section, liFor the circumferential length of the i-th section,For i-th of abnormal deformation section
Circumferential length；
According to deformation nonuniformity coefficient, deformation degree of irregularity is divided into multiple grades.
10. a kind of hierarchy system suitable for the uneven large deformation of soft rock tunnel, characterized in that including tunnel cross-section instrument and data
Processing equipment, tunnel cross-section instrument carry out size to the section after the section and preliminary bracing stabilization before Tunnel and sweep
It retouches, and the data after scanning is transmitted to data processing equipment, data processing equipment is configured as:
Tunnel cross-section overall deformation is determined according to the size difference before and after section；
Based on tunnel cross-section overall deformation, abnormal deformation and abnormal deformation section are defined, deformed area further is divided to section
Section；
Tunnel is calculated for deformation section be averaged and relative deformation and deform nonuniformity coefficient, and is averaged relative deformation according to tunnel
Amount and deformation nonuniformity coefficient are classified as foundation deformation grade and the uneven grade of deformation to by the uneven large deformation of soft rock tunnel.
It shows equipment, the classification results of data processing equipment is shown.
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