CN116541933A - Method for evaluating single-ring service performance of shield tunnel with multiple disease indexes - Google Patents
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Abstract
The invention provides a method for evaluating the single-ring service performance of a shield tunnel with multiple disease indexes, which comprises the following specific steps: (1) Establishing an evaluation index system of service bearing performance and service performance of the shield tunnel; (2) Determining judgment standards and corresponding parameters of each index in an evaluation index system; (3) Determining weight coefficients of the evaluation indexes in the aspects of bearing performance and using performance; (4) Determining weight coefficients of the bearing performance and the using performance according to the influence of the diseases on the bearing performance and the using performance; (5) And comprehensively evaluating the service performance of the shield tunnel to obtain the multi-disease technical condition value. The invention considers the influence of multiple diseases on the bearing performance and the using performance in multiple angles, so that the evaluation result can comprehensively consider the bearing performance and the using performance.
Description
Technical Field
The invention belongs to the field of tunnel structure engineering, and particularly relates to a method for evaluating single-ring service performance of a shield tunnel with multiple disease indexes.
Background
Along with the process of urban mass transfer, subways become important components of urban traffic, and subway shield tunnels are more and more. Due to the complexity of geological environment and the increase of service life, shield tunnels face various diseases, such as cracking, convergence deformation, uneven settlement, steel bar corrosion, hollowness, water leakage and the like, and influence on the bearing performance and the service performance in the operation period to different degrees.
In order to evaluate the severity of the diseases, the disease conditions of the tunnel structure can be obtained through disease investigation, and the disease grades are classified. In the prior art, weighted average or an algorithm similar to fuzzy comprehensive evaluation is generally adopted for analysis, but complex coupling relations among different diseases are not considered, and weight determination of different diseases is dependent on technical experience. Therefore, in order to determine the influence of multiple diseases on the structural bearing performance and the service performance, and ensure the stability and the safety of the shield tunnel, it is necessary to provide a method for evaluating the service performance of the shield tunnel with multiple disease indexes, and comprehensively evaluate the defect condition of the shield tunnel in the service stage.
Aiming at the characteristics of complex influence rule of various diseases of the shield on the structural bearing performance and unknown coupling relation of different diseases, the invention provides a quantitative analysis method for evaluating the safety state of the tunnel segment ring structure when various diseases coexist based on the cause and mutual influence rule of the diseases.
Disclosure of Invention
The invention provides a method for evaluating the single-ring service performance of a shield tunnel with multiple disease indexes, which starts from the development and change rule of tunnel diseases, and can at least solve part of problems in the prior art by quantitatively evaluating the structural safety state in combination with the influence on the bearing performance and the service performance.
In order to solve the technical problems, according to one aspect of the present invention, the following technical solutions are provided:
a method for evaluating the single-ring service performance of a shield tunnel with multiple disease indexes is characterized by comprising the following steps:
s1, establishing an evaluation index system of service bearing performance and service performance of a shield tunnel;
s2, determining judgment standards and corresponding parameters of each index in the evaluation index system;
s3, determining weight coefficients of the evaluation indexes in the aspects of bearing performance and using performance;
s4, determining weight coefficients of the bearing performance and the using performance according to the influence of the diseases on the bearing performance and the using performance;
s5, comprehensively evaluating the service performance of the shield tunnel to obtain a multi-disease technical condition value.
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the evaluation index system of the service bearing performance and the service performance of the shield tunnel considers cracks, convergence deformation, dislocation, steel bar corrosion, water leakage and carbonization defects.
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: and the evaluation standard of each index in the evaluation index system is that each evaluation index disease is divided into 5 grades, wherein 0 grade is no disease, 1 grade is slight disease, 2 grade is serious disease, 3 grade is serious disease, 4 grade is extremely serious disease, and corresponding grading parameters are obtained according to grading.
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the grading parameters are obtained according to calculation, a relation curve of the disease characteristics and the bearing capacity is obtained through calculation, the stages are divided according to the attenuation condition of the bearing capacity and the structural deformation characteristics, and the disease characteristics corresponding to the dividing lines of the stages are used as grading thresholds.
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: each evaluation index has an initial weight coefficient in terms of bearing performance and service performance, and when a specific coupling relation exists, correction can be performed on the initial weight coefficient.
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of each disease in the aspect of bearing performance can be calculated by the following formula
Wherein omega bi The weight coefficient of each evaluation index in the aspect of bearing performance is used; x is x i Index parameters for evaluating the index; sigma x i The sum of index parameters of each evaluation index;
initial index parameter x of evaluation index i The calculation method of (2) is as follows:
(1) Calculating the bearing capacity of the disease-free structure, and marking as P;
(2) Calculating the structural bearing capacity when only one disease exists and the grading parameter of the disease is 2, and marking the structural bearing capacity as P i ；
(3) Index parameter
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of each disease in the aspect of using performance can be calculated by the following formula
Wherein omega ui The weight coefficient of each evaluation index in the aspect of using performance is calculated; y is i Index parameters for evaluating the index; Σy i The sum of index parameters of each evaluation index; initial index parameter y of evaluation index i The calculation method of (2) is as follows:
(1) Calculating the service performance of the disease-free structure, and marking as Q;
(2) Calculating the structure service performance when only one disease exists and the grading parameter of the disease is 2, and marking the structure service performance as Q i ；
(3) Index parameter
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of each evaluation index in the aspects of bearing performance and service performance can be respectively increased on the basis of initial parameters or corrected initial parameters when the grading parameters of the cracks are more than or equal to 3 and the weight coefficient of the cracks in the aspects of bearing performance and service performance is calculatedAnd->
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of each evaluation index in the aspect of bearing performance and service performance can be increased on the basis of initial parameters or corrected initial parameters when the weight coefficient of the crack in the aspect of bearing performance is calculated when the crack and the water leakage exist simultaneously
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of each evaluation index in the aspect of bearing performance and service performance can be increased on the basis of the initial parameter or the corrected initial parameter when the grading parameter of the convergence deformation is more than or equal to 3 and the weight coefficient of the convergence deformation in the aspect of bearing performance is calculatedWhen calculating the weight coefficient of the convergence deformation in terms of the use performance, the index parameter can be the initial parameter or the corrected initial parameterIs added with->
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of each evaluation index in the aspects of bearing performance and service performance can be increased on the basis of the initial parameters (or corrected initial parameters) when the grading parameters of the staggered platform are more than or equal to 3 and the weight coefficient of the staggered platform in the aspects of service performance is calculated
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of each evaluation index in the aspects of bearing performance and service performance can be increased on the basis of initial parameters or corrected initial parameters when the weight coefficient of the steel bar corrosion in the aspect of bearing performance is calculated when the steel bar corrosion and the water leakage exist simultaneously
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of each evaluation index in the aspect of bearing performance and service performance can be increased on the basis of initial parameters or corrected initial parameters when the classification parameter of the water leakage is more than or equal to 3 and the weight coefficient of the water leakage in the aspect of bearing performance is calculated
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of each evaluation index in the aspects of bearing performance and service performance is calculated when the operation period exceeds 20 yearsWhen weighting factors in terms of load carrying performance are used, the index parameter can be increased based on the initial parameter or the corrected initial parameterWhen calculating the weight coefficient of carbonization in terms of use performance, the index parameter may be increased by +.>
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: the weight coefficient of the bearing performance and the using performance is determined according to the influence of diseases on the bearing performance and the using performance, and the sum of the weight coefficient of the bearing performance and the using performance is 1; the specific calculation method is as follows:
wherein the method comprises the steps of
F B ＝ω b1 B+ω b2 D+ω b3 S+ω b4 C+ω b5 H+ω b6 L
F U ＝ω u1 B+ω u2 D+ω u3 S+ω u4 C+ω u5 H+ω u6 L
Wherein alpha is a load bearing performance weight coefficient, and beta is a service performance weight coefficient; f (F) B Is the technical status value of multiple disease bearing performance, F U Performance state of the art values are used for multiple diseases; B. d, S, C, H, L are respectively grading parameters of diseases such as cracks, convergence deformation, dislocation, steel bar corrosion, carbonization, water leakage and the like; omega b1 、ω b2 、ω b3 、ω b4 、ω b5 、ω b6 Respectively the weight coefficients of cracks, convergence deformation, dislocation, steel bar corrosion, carbonization and water leakage when the bearing performance is considered; omega u1 、ω u2 、ω u3 、ω u4 、ω u5 、ω u6 Respectively the weight coefficients of cracks, convergence deformation, dislocation, steel bar corrosion, carbonization and water leakage when the service performance is considered.
As the preferable scheme of the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes, the invention comprises the following steps: and (3) evaluating the single-ring service performance of the shield tunnel according to grading parameters and weight coefficients of each index, wherein the evaluation index is a multi-disease technical condition value, and the specific evaluation formula is as follows:
F＝αF B +βF U
wherein F is a value of multiple disease state.
Compared with the prior art, the invention has the advantages that:
(1) The method considers the evaluation method of the shield tunnel multiple faults, considers the influence of 6 faults on the shield tunnel under the coupling effect, and solves the problem that the conventional evaluation method cannot consider the coupling factor.
(2) The invention considers the influence of multiple diseases on the bearing performance and the using performance in multiple angles, so that the evaluation result can comprehensively consider the bearing performance and the using performance.
(3) According to the invention, under different working conditions, the weight coefficient of the multi-disease coupling is obtained through the refined finite element model, and the weight value method for determining the structural use performance and the bearing performance of different diseases according to the evaluation standard can accurately embody the structural safety and the use performance under the condition of the multi-disease coupling.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a shield tunnel single-ring service performance evaluation flow with multiple disease indexes.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description will be made clearly and fully with reference to the technical solutions in the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
As shown in FIG. 1, the method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes comprises the following specific implementation steps:
s1, establishing an evaluation index system of service bearing performance and service performance of a shield tunnel;
s2, determining judgment standards and corresponding parameters of each index in an evaluation index system;
step S3, determining weight coefficients of the evaluation indexes in the aspects of bearing performance and using performance;
s4, determining weight coefficients of the bearing performance and the using performance according to the influence of the diseases on the bearing performance and the using performance;
and S5, comprehensively evaluating the service performance of the shield tunnel to obtain a multi-disease technical condition value.
Examples
And (5) taking a certain segment of the shield tunnel after the shield tunnel is in service for 10 years, detecting the damage of the segment, and evaluating the service performance of the segment.
1. According to the requirements, the defects of cracks, convergence deformation, dislocation, steel bar corrosion, water leakage, carbonization and the like need to be considered.
2. And obtaining grading parameters of each disease according to the obtained disease characteristics and combining the relationship curve of the disease characteristics and the bearing capacity, wherein the grading parameters are shown in the following table.
| Index (I) | Index parameter |
| Crack and crack | 3 |
| Convergent deformation | 2 |
| Staggering table | 2 |
| Steel bar rust | 1 |
| Carbonization | 1 |
| Leakage water | 2 |
3. Determining weight coefficients of each evaluation index in bearing performance and using performance
1. Determining initial index parameters
Initial index parameter x of evaluation index in bearing performance i The calculation method of (2) is as follows:
(1) Calculating and evaluating the bearing capacity of the disease-free structure of the structure, and marking as P
(2) Calculating and evaluating the structural bearing capacity when only one disease exists in the structure and the grading parameter of the disease is 2, and marking the structural bearing capacity as P i
(3) Index parameter
The calculation results are shown in the following table:
| index (I) | Index parameter |
| Crack and crack | 0.11 |
| Convergent deformation | 0.07 |
| Staggering table | 0.10 |
| Steel bar rust | 0.15 |
| Carbonization | 0.05 |
| Leakage water | 0.03 |
Initial index parameter y for evaluating index in terms of performance in use i The calculation method of (2) is as follows:
(1) Calculate the service performance of the disease-free structure, which is marked as Q
(2) Calculating the structure service performance when only one disease exists and the grading parameter of the disease is 2, and marking the structure service performance as Q i
(3) Index parameter
The calculation results are shown in the following table:
| index (I) | Index parameter |
| Crack and crack | 0 |
| Convergent deformation | 0.09 |
| Staggering table | 0.10 |
| Steel bar rust | 0 |
| Carbonization | 0.02 |
| Leakage water | 0.14 |
2. Modifying the index parameter in consideration of the coupling relation
(1) Since the classification parameter of the crack is more than or equal to 3, the index parameter can be respectively increased on the basis of the initial parameter (or the corrected initial parameter) when the weight coefficient of the crack in the aspects of bearing performance and service performance is calculatedAnd
(2) Since the crack and the water leakage exist at the same time, when the weight coefficient of the crack in the aspect of bearing performance is calculated, the index parameter can be increased based on the initial parameter (or the corrected initial parameter)
(3) Because the steel bar corrosion and the water leakage exist at the same time, when the weight coefficient of the steel bar corrosion in the aspect of bearing performance is calculated, the index parameter can be increased on the basis of the initial parameter (or the corrected initial parameter)
3. Calculating weight coefficients of each evaluation index in bearing performance and using performance
Taking the above situation into consideration, the modified index parameters and weights considering the bearing performance are as follows:
| index (I) | Index parameter | Weight coefficient |
| Crack and crack | 0.11+0.075+0.075＝0.26 | 0.354 |
| Convergent deformation | 0.07 | 0.095 |
| Staggering table | 0.10 | 0.136 |
| Steel bar rust | 0.15+0.075＝0.225 | 0.306 |
| Carbonization | 0.05 | 0.068 |
| Leakage water | 0.03 | 0.041 |
In consideration of the above, the modified index parameters and weights for consideration of the usage performance are as follows:
| index (I) | Index parameter | Weight coefficient |
| Crack and crack | 0+0.07＝0.07 | 0.095 |
| Convergent deformation | 0.09 | 0.122 |
| Staggering table | 0.10 | 0.136 |
| Steel bar rust | 0 | 0.000 |
| Carbonization | 0.02 | 0.027 |
| Leakage water | 0.14 | 0.190 |
4. The weight coefficient of the bearing performance and the using performance is determined according to the evaluation standard, and the weight coefficient is specifically as follows:
F B ＝ω b1 B+ω b2 D+ω b3 S+ω b4 C+ω b5 H+ω b6 L
＝0.354×3+0.095×2+0.136×2+0.306×1+0.068×1+0.041×2＝1.980
F U ＝ω u1 B+ω u2 D+ω u3 S+ω u4 C+ω u5 H+ω u6 L
＝0.095×3+0.122×2+0.136×2+0×1+0.027×1+0.190×2＝1.211
5. comprehensively evaluating the service performance of the shield tunnel to obtain a multi-disease technical condition value, wherein the multi-disease technical condition value is calculated as follows:
F＝αF B +βF U ＝0.620×1.980+0.380×1.211＝1.688
the multi-disease technical condition value of the single ring of the shield tunnel is 1.688, and the shield tunnel belongs to serious diseases in comprehensive view.
The method provides a more accurate and reliable analysis means for evaluating the operation safety state of the shield tunnel structure, effectively guides the development of operation maintenance work, can reduce various safety accidents caused by structural damage in the operation period, and can save the operation maintenance cost by scientifically guiding and deciding to heighten the service life of the tunnel on the other hand, and has remarkable social and economic benefits. The method can be directly applied to structural safety state evaluation of the operation track traffic shield tunnel, can be further popularized and applied to roads, municipal roads and power pipeline tunnels constructed by using a shield method, and has extremely wide application prospect.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the content of the present invention or direct/indirect application in other related technical fields are included in the scope of the present invention.
Claims (9)
1. A method for evaluating the single-ring service performance of a shield tunnel with multiple disease indexes is characterized by comprising the following steps:
s1, establishing an evaluation index system of service bearing performance and service performance of a shield tunnel;
s2, determining judgment standards and corresponding parameters of each index in the evaluation index system;
s3, determining weight coefficients of the evaluation indexes in the aspects of bearing performance and using performance;
s4, determining weight coefficients of the bearing performance and the using performance according to the influence of the diseases on the bearing performance and the using performance;
s5, comprehensively evaluating the service performance of the shield tunnel to obtain a multi-disease technical condition value.
2. The method for evaluating the service performance of the single ring of the shield tunnel with multiple disease indexes according to claim 1, wherein an evaluation index system of the service load bearing performance and the service performance of the shield tunnel considers cracks, convergence deformation, dislocation, steel bar corrosion, water leakage and carbonization defects.
3. The method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes according to claim 2, wherein the evaluation standards of the indexes in the evaluation index system are characterized in that the disease of each evaluation index is divided into 5 grades, wherein grade 0 is no disease, grade 1 is slight disease, grade 2 is serious disease, grade 3 is serious disease, grade 4 is extremely serious disease, and corresponding grading parameters are obtained according to grading.
4. The method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes according to claim 3, wherein the grading parameters are obtained according to calculation, a relation curve of the disease characteristics and the bearing capacity is obtained through calculation, and the disease characteristics corresponding to the dividing line of each stage are used as grading thresholds according to the attenuation condition of the bearing capacity and the structural deformation characteristics.
5. The method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes according to claim 4, wherein each evaluation index has an initial weight coefficient in terms of bearing performance and service performance, and when the evaluation index has a specific coupling relation, the evaluation index can be corrected on the initial weight coefficient.
6. The method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes according to claim 5, wherein the weight coefficient of each disease in the aspect of bearing performance can be calculated by the following formula:
wherein omega bi The weight coefficient of each evaluation index in the aspect of bearing performance is used; x is x i Index parameters for evaluating the index; sigma x i The sum of index parameters of each evaluation index;
initial index parameter x of evaluation index i The calculation method of (2) is as follows:
(1) Calculating the bearing capacity of the disease-free structure, and marking as P;
(2) Calculating the structural bearing capacity when only one disease exists and the grading parameter of the disease is 2, and marking the structural bearing capacity as P i ；
(3) Index parameter
7. The method for evaluating the service performance of a single ring of a shield tunnel with multiple disease indexes according to claim 6, wherein the weight coefficient of each disease in terms of service performance can be calculated by the following formula
Wherein omega ui The weight coefficient of each evaluation index in the aspect of using performance is calculated; y is i Index parameters for evaluating the index; Σy i The sum of index parameters of each evaluation index; initial index parameter y of evaluation index i The calculation method of (2) is as follows:
(1) Calculating the service performance of the disease-free structure, and marking as Q;
(2) Calculating the structure service performance when only one disease exists and the grading parameter of the disease is 2, and marking the structure service performance as Q i ；
(3) Index parameter
8. The method for evaluating the single-ring service performance of the shield tunnel with multiple disease indexes according to claim 7, wherein the weight coefficients of the bearing performance and the using performance are determined according to the influence of the disease on the bearing performance and the using performance, and the sum of the weight coefficients of the bearing performance and the using performance is 1; the specific calculation method is as follows:
wherein:
F B ＝ω b1 B+ω b2 D+ω b3 S+ω b4 C+ω b5 H+ω b6 L
F U ＝ω u1 B+ω u2 D+ω u3 S+ω u4 C+ω u5 H+ω u6 L
wherein alpha is a load bearing performance weight coefficient, and beta is a service performance weight coefficient; f (F) B Is the technical status value of multiple disease bearing performance, F U Performance state of the art values are used for multiple diseases; B. d, S, C, H, L are respectively grading parameters of diseases such as cracks, convergence deformation, dislocation, steel bar corrosion, carbonization, water leakage and the like; omega b1 、ω b2 、ω b3 、ω b4 、ω b5 、ω b6 Respectively the weight coefficients of cracks, convergence deformation, dislocation, steel bar corrosion, carbonization and water leakage when the bearing performance is considered; omega u1 、ω u2 、ω u3 、ω u4 、ω u5 、ω u6 Respectively the weight coefficients of cracks, convergence deformation, dislocation, steel bar corrosion, carbonization and water leakage when the service performance is considered.
9. The method for evaluating the single-ring service performance of the shield tunnel according to claim 8, wherein the single-ring service performance of the shield tunnel is evaluated according to grading parameters and weight coefficients of various indexes, the evaluation indexes are multiple-disease technical condition values, and the specific evaluation formulas are as follows:
F＝αF B +βF U
wherein F is a value of multiple disease state.
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| CN117217562B (en) * | 2023-11-09 | 2024-01-23 | 交通运输部公路科学研究所 | Structural safety evaluation method and system after tunnel water flooding-drainage |
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