CN-121997799-A - Method and device for calculating response characteristics of shield tunnel pneumatic effect stress field

CN121997799ACN 121997799 ACN121997799 ACN 121997799ACN-121997799-A

Abstract

The invention provides a method and a device for calculating response characteristics of a shield tunnel pneumatic effect stress field, which relate to the technical field of shield tunnels and comprise the steps of obtaining a plurality of stress value data of a plurality of longitudinal sections of the tunnel; the method comprises the steps of respectively calculating an average value of each section, respectively calculating a first correction coefficient set and a second correction coefficient set of each section, respectively constructing a circumferential stress characteristic model of the aerodynamic effect of each section, fitting the circumferential stress characteristic models of a plurality of sections to obtain a full tunnel stress characteristic model, taking the angle and the longitudinal distance of a point to be measured into the full tunnel stress characteristic model, and respectively calculating a stress value and an acceleration value of the aerodynamic effect of the point to be measured. According to the invention, only a limited number of monitoring devices are arranged on a plurality of sections of the tunnel, so that the stress value and the acceleration value of the whole tunnel at each point position due to the pneumatic effect can be obtained, and the arrangement number of the monitoring devices of the tunnel is reduced.

Inventors

FENG KUN
Tang Ruoyang
HE CHUAN
YANG HAO
CHEN PAN

Assignees

西南交通大学

Dates

Publication Date: 20260508
Application Date: 20251219

Claims (10)

1. The method for calculating the response characteristics of the shield tunnel pneumatic effect stress field is characterized by comprising the following steps of: acquiring a plurality of stress value data of a plurality of longitudinal sections of a tunnel, wherein the plurality of sections are distributed along the longitudinal direction of the tunnel at intervals, and the stress value data of each section are data acquired by a plurality of monitoring devices arranged at intervals in the circumferential direction of the section; Calculating an average value of each section based on a plurality of stress value data of each section; The stress value data of each section are respectively calculated based on the stress value data of each section, and the stress value data of each section are respectively a first correction coefficient set and a second correction coefficient set in the horizontal direction and the vertical direction; Constructing a hoop stress characteristic model of the aerodynamic effect of each section based on the average value, the first correction coefficient set and the second correction coefficient set of each section; fitting the hoop stress characteristic models of the aerodynamic effects of the multiple sections to obtain a full tunnel stress characteristic model; and the angle and the longitudinal distance of the point to be tested are brought into the full tunnel stress characteristic model, and the stress value and the acceleration value of the aerodynamic effect of the point to be tested are calculated respectively.
2. The method for calculating the response characteristics of the shield tunnel pneumatic effect stress field according to claim 1, wherein the calculating process of the first correction coefficient set and the second correction coefficient set comprises the following steps: determining the number of stress value data for each section; Calculating a correction order set based on the number of the stress value data of each section, wherein the correction order set comprises a plurality of positive integers which are larger than zero, and the positive integers are smaller than or equal to half of the number of the stress value data of each section; and respectively calculating the first correction coefficient set and the second correction coefficient set based on the correction order set and the stress value data.
3. The method for calculating the response characteristics of the pneumatic effect stress field of the shield tunnel according to claim 1, wherein the process of fitting the hoop stress characteristic models of the pneumatic effect of the multiple sections to obtain the full tunnel stress characteristic model comprises the following steps: performing exponential function fitting on the average value along the longitudinal direction of the tunnel to obtain a first Fourier coefficient at any longitudinal position; Respectively carrying out exponential function fitting on the first correction coefficient set and the second correction coefficient set along the longitudinal direction of the tunnel, and respectively obtaining a second Fourier coefficient and a third Fourier coefficient at any longitudinal position, wherein when respectively carrying out exponential function fitting on the average value, the first correction coefficient set and the second correction coefficient set, the residual value of the function is ignored, and the data obtained by the monitoring device is used for calculation; and obtaining the full tunnel stress characteristic model based on the first Fourier coefficient, the second Fourier coefficient and the third Fourier coefficient.
4. A method of calculating the response characteristics of the aerodynamic stress field of a shield tunnel according to claim 3, wherein the performing exponential function fitting on the average value along the tunnel longitudinal direction to obtain the first fourier coefficient at any longitudinal position comprises: fitting the average value based on a least square method to obtain a logarithmic model; The method comprises the steps of respectively obtaining the longitudinal distance of each section and fitting data of each section, wherein the fitting data is one of a plurality of stress value data of each section, and a connecting line of a monitoring device for obtaining fitting data of each section is parallel to the longitudinal direction of a tunnel; the longitudinal distance of each section and the fitting data of each section are brought into the logarithmic model, and the longitudinal fitting parameters of the average value are calculated; and obtaining the first Fourier coefficient based on the longitudinal fitting parameter and an average value.
5. A shield tunnel pneumatic effect stress field response characteristic calculation device, comprising: The data acquisition module is used for acquiring a plurality of stress value data of a plurality of longitudinal sections of the tunnel, the plurality of sections are distributed at intervals along the longitudinal direction of the tunnel, and the stress value data of each section are data acquired by a plurality of monitoring devices arranged at intervals along the circumferential direction of the section; the first calculation module is used for calculating the average value of each section based on the stress value data of each section; The second calculation module is used for calculating based on the stress value data of each section, and the stress value data of each section are respectively a first correction coefficient set and a second correction coefficient set in the horizontal direction and the vertical direction; the first model construction module is used for constructing a hoop stress characteristic model of the aerodynamic effect of each section based on the average value, the first correction coefficient set and the second correction coefficient set of each section respectively; The second model construction module is used for fitting the hoop stress characteristic models of the aerodynamic effects of the multiple sections to obtain a full tunnel stress characteristic model; The data processing module is used for bringing the angle and the longitudinal distance of the point to be detected into the full tunnel stress characteristic model, and respectively calculating to obtain the stress value and the acceleration value of the aerodynamic effect of the point to be detected.
6. The shield tunnel aerodynamic stress field response characteristics calculation device of claim 5, wherein the second calculation module comprises: a number confirmation unit configured to determine the number of the stress value data for each section; a first calculation unit for calculating a correction order set based on the number of the stress value data of each section, wherein the correction order set comprises a plurality of positive integers larger than zero, and the positive integers are smaller than or equal to half of the number of the stress value data of each section; And the second calculation unit is used for respectively calculating the first correction coefficient set and the second correction coefficient set based on the correction order set and the stress value data.
7. The shield tunnel aerodynamic stress field response characteristic calculation device of claim 5, wherein the second model building module comprises: the first fitting unit is used for performing exponential function fitting on the average value along the longitudinal direction of the tunnel to obtain a first Fourier coefficient at any longitudinal position; The second fitting unit is used for respectively carrying out exponential function fitting on the first correction coefficient set and the second correction coefficient set along the longitudinal direction of the tunnel and respectively obtaining a second Fourier coefficient and a third Fourier coefficient at any longitudinal position, wherein when respectively carrying out exponential function fitting on the average value, the first correction coefficient set and the second correction coefficient set, the residual value of the function is ignored and the data obtained by the monitoring device is used for calculation; The first model construction unit is used for obtaining the full tunnel stress characteristic model based on the first Fourier coefficient, the second Fourier coefficient and the third Fourier coefficient.
8. The shield tunnel aerodynamic stress field response characteristic calculation device of claim 7, wherein the first fitting unit comprises: The first fitting subunit is used for fitting the average value based on a least square method to obtain a logarithmic model; The data acquisition unit is used for respectively acquiring the longitudinal distance of each section and fitting data of each section, wherein the fitting data is one of a plurality of stress value data of each section, and the connecting line of the monitoring device for acquiring the fitting data of each section is parallel to the longitudinal direction of the tunnel; The third calculation unit is used for bringing the longitudinal distance of each section and the fitting data of each section into the logarithmic model, and calculating to obtain longitudinal fitting parameters of an average value; and obtaining the first Fourier coefficient based on the longitudinal fitting parameter and an average value.
9. A shield tunnel pneumatic effect stress field response characteristic computing device, comprising: A memory for storing a computer program; a processor for implementing the steps of the shield tunnel aerodynamic stress field response characteristic calculation method according to any of claims 1 to 4 when executing said computer program.
10. A readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, implements the steps of the shield tunnel aerodynamic stress field response characteristic calculation method according to any of claims 1 to 4.

Description

Method and device for calculating response characteristics of shield tunnel pneumatic effect stress field Technical Field The invention relates to the technical field of shield tunnels, in particular to a method and a device for calculating response characteristics of a pneumatic effect stress field of a shield tunnel. Background In the construction and operation process of the shield tunnel, the stress state of the tunnel is directly related to the stability and the safety of the structure, and the acceleration value can reflect the dynamic response condition of the tunnel when the tunnel is subjected to external load (such as earthquake, train operation vibration and the like). In the prior art, if a stress value and an acceleration value of a certain point of a shield tunnel need to be obtained, a corresponding monitoring device needs to be arranged at the point, if a stress value and an acceleration value of a plurality of points need to be obtained, a corresponding number of monitoring devices need to be arranged, the demand of the monitoring devices is large, and the stress value and the acceleration value of each point of the whole tunnel cannot be obtained (the monitoring devices cannot be fully distributed). Disclosure of Invention The invention aims to provide a method and a device for calculating response characteristics of a shield tunnel pneumatic effect stress field so as to solve the problems. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The application provides a shield tunnel pneumatic effect stress field response characteristic calculation method, which comprises the steps of obtaining a plurality of stress value data of a plurality of longitudinal sections of a tunnel, wherein the plurality of sections are distributed along the longitudinal direction of the tunnel at intervals, the stress value data of each section are data obtained by a plurality of monitoring devices arranged at intervals in the circumferential direction of the section, calculating the average value of each section based on the stress value data of each section respectively, calculating the stress value data of each section based on the stress value data of each section respectively, constructing a first correction coefficient set and a second correction coefficient set of the stress value data of each section in the horizontal direction and the vertical direction respectively, constructing a circumferential stress characteristic model of each section pneumatic effect based on the average value, the first correction coefficient set and the second correction coefficient set of each section respectively, fitting the circumferential stress characteristic model of the plurality of sections to obtain a full tunnel stress characteristic model, taking the angle and the longitudinal distance of a point location to be measured into the full tunnel stress characteristic model, and calculating the stress value and the acceleration value of the point location to be measured respectively. The application provides a shield tunnel pneumatic effect stress field response characteristic calculation device, which comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring a plurality of stress value data of a plurality of longitudinal sections of a tunnel, the plurality of sections are distributed along the longitudinal interval of the tunnel, and the stress value data of each section are data acquired by a plurality of monitoring devices arranged at the circumferential interval of the section; the device comprises a first calculation module, a second calculation module, a first model construction module, a data processing module and a data processing module, wherein the first calculation module is used for calculating and obtaining an average value of each section based on a plurality of stress value data of each section, the second calculation module is used for calculating and obtaining a first correction coefficient set and a second correction coefficient set of the stress value data of each section in the horizontal direction and the vertical direction based on the stress value data of each section, the first model construction module is used for constructing a hoop stress characteristic model of the aerodynamic effect of each section based on the average value, the first correction coefficient set and the second correction coefficient set of each section, the second model construction module is used for fitting the hoop stress characteristic models of the aerodynamic effect of the sections to obtain a full tunnel stress characteristic model, and the data processing module is used for bringing the angle and the longitudinal distance of a point to be measured into the full tunnel stress characteristic model and calculating and obtaining the stress value and the acceleration value of the aerod