CN109211167B - Tunnel secondary lining thickness accurate detection method based on function curve fitting - Google Patents
Tunnel secondary lining thickness accurate detection method based on function curve fitting Download PDFInfo
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- CN109211167B CN109211167B CN201811022786.1A CN201811022786A CN109211167B CN 109211167 B CN109211167 B CN 109211167B CN 201811022786 A CN201811022786 A CN 201811022786A CN 109211167 B CN109211167 B CN 109211167B
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- G01—MEASURING; TESTING
- 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
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
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Abstract
The invention discloses a method for accurately detecting the thickness of a secondary lining of a tunnel based on function curve fitting, which comprises the steps of establishing a standard function curve of a secondary lining of the tunnel, and determining a design triaxial standard coordinate value of any point on an outline curve of the secondary lining; collecting three-axis coordinate values of the datum points; measuring the triaxial coordinate value of a tunnel secondary lining detection point on the basis of the triaxial coordinate value of the known reference point; and obtaining Y-axis and Z-axis design coordinate values of corresponding detection points according to the X-axis coordinate values of the detection points, comparing the Y-axis and Y-axis design coordinate values with the Z-axis and Y-axis coordinate values which are actually measured, and calculating the offset difference of the corresponding detection points to obtain the tunnel secondary lining thickness and the offset difference. The method is based on function curve fitting, and improves the accuracy of the thickness difference value and the offset difference value of the secondary lining of the tunnel.
Description
Technical Field
The invention relates to a method for accurately detecting the thickness of a tunnel secondary lining based on function curve fitting.
Background
In the big development period of the infrastructure in China, finished projects need to be detected and accepted no matter in the construction process of the civil engineering or the bridge, tunnel, road and the like, so as to ensure the quality safety of the projects. With the vigorous development of high-speed railways in China, tunnels are gradually the key points for construction. In the process of tunnel construction, in order to ensure the long-term safety of the tunnel, the good and bad of the construction quality of the secondary lining becomes a decisive factor. In the tunnel construction process, the tunnel secondary lining often causes the problems of insufficient tunnel secondary lining thickness or secondary lining deviation and the like because the two-lining trolley deviates from the central line of the tunnel or other construction factors, and the safety of the tunnel is greatly threatened.
Disclosure of Invention
The invention provides a method for accurately detecting the thickness of a tunnel secondary lining based on function curve fitting in order to solve the problems, and the method can well solve the problems and improve the quality and the safety of the tunnel.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for accurately detecting the thickness of a secondary tunnel lining based on function curve fitting comprises the following steps:
establishing a standard function curve of the secondary lining of the tunnel, and determining a design triaxial standard coordinate value of any point on the secondary lining outline curve;
collecting three-axis coordinate values of the datum points;
measuring the triaxial coordinate value of a tunnel secondary lining detection point on the basis of the triaxial coordinate value of the known reference point;
and obtaining Y-axis and Z-axis design coordinate values of corresponding detection points according to the X-axis coordinate values of the detection points, comparing the Y-axis and Y-axis design coordinate values with the Z-axis and Y-axis coordinate values which are actually measured, and calculating the offset difference of the corresponding detection points to obtain the tunnel secondary lining thickness and the offset difference.
And further, establishing a function curve of the secondary lining outer contour of the tunnel according to the center coordinates and the radius of the tunnel in the design drawing.
Furthermore, a real-time dynamic carrier phase differential technology is utilized to acquire the three-axis coordinate value of the datum point.
Further, measuring the triaxial coordinate values of the detection points on the tunnel secondary lining by using a total station, comparing the designed triaxial coordinate values of each detection point on the function curve to obtain the difference value of the detection points and the function curve, and further obtaining the thickness difference value and the offset difference value of the tunnel secondary lining.
A system for accurately detecting the thickness of a tunnel secondary lining based on function curve fitting, which is operated on a processor or a memory and is configured to execute the following instructions:
establishing a standard function curve of the secondary lining of the tunnel, and determining a design triaxial standard coordinate value of any point on the secondary lining outline curve;
collecting three-axis coordinate values of the datum points;
measuring the triaxial coordinate value of a tunnel secondary lining detection point on the basis of the triaxial coordinate value of the known reference point;
and obtaining Y-axis and Z-axis design coordinate values of corresponding detection points according to the X-axis coordinate values of the detection points, comparing the Y-axis and Y-axis design coordinate values with the Z-axis and Y-axis coordinate values which are actually measured, and calculating the offset difference of the corresponding detection points to obtain the tunnel secondary lining thickness and the offset difference.
The contour line of the tunnel secondary lining is composed of a single circle or a plurality of circles, a three-dimensional coordinate system is constructed, the origin of the coordinate system is determined by considering the actual measurement conditions on site, and the equation of the circles is determined according to the center coordinates, the radius and the range of each circle in the design data, so that the tunnel secondary lining standard function curve with a single section can be constructed.
And (4) stretching along the tunnel excavation direction by depending on a secondary lining standard function curve of a single section, and determining the three-axis coordinate value of any point on the surface of the secondary lining.
Monitoring points are distributed on the surface of the secondary lining, a total station is utilized to transfer the origin of coordinates to corresponding monitoring points, and on the basis, the monitoring points are measured to obtain three-dimensional coordinate values of the monitoring points; and sequentially measuring the plurality of monitoring points to obtain the three-axis coordinate values of the plurality of monitoring points, constructing a secondary lining actual profile curve, and comparing the secondary lining actual profile curve with a secondary lining standard function curve to obtain the position deviation value and the thickness deviation value of the tunnel secondary lining.
Compared with the prior art, the invention has the beneficial effects that:
1. based on function curve fitting, the accuracy of the thickness difference value and the offset difference value of the secondary lining of the tunnel is improved;
2. the complex operation of manually detecting the secondary lining thickness of the tunnel by adopting a radar is avoided, the tunnel construction efficiency is improved, and the tunnel construction progress is accelerated;
3. the tunnel quality and the safety permanence can be guaranteed extremely well, and the service life of the tunnel is prolonged to a certain extent.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of the detection process of the present invention;
the specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only terms of relationships determined for convenience of describing structural relationships of the parts or elements of the present invention, and are not intended to refer to any parts or elements of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.
As shown in fig. 1, a method for accurately detecting the thickness of a secondary lining of a tunnel based on function curve fitting includes establishing a curve function of a secondary lining profile of the tunnel in mat ab software according to data such as the circle center and radius size of the tunnel in a design drawing, and obtaining a design triaxial coordinate value of each point. The instrument is mainly a total station instrument, on the basis of obtaining the coordinate values of three axes (X axis, Y axis and Z axis) of a reference point, a site constructor measures the coordinate values of the three axes of a monitoring point on a tunnel secondary lining by using the total station instrument, compares the designed three axis coordinate values of the point in mat ab software to obtain the coordinate difference values of the monitoring point and the monitoring point on three coordinate axes, and further obtains the thickness difference value of the tunnel secondary lining.
The detection method is based on functional curve fitting.
A method for accurately detecting the thickness of a secondary tunnel lining based on function curve fitting is characterized by comprising the following steps:
A. establishing a standard function curve of the secondary lining of the tunnel, establishing a function curve of the secondary lining outer contour of the tunnel in mat ab software according to data such as the center coordinates, the radius and the like of the tunnel in a design drawing, and obtaining the design triaxial standard coordinate value of any point on the secondary lining outer contour curve;
B. collecting three-axis (X-axis, Y-axis and Z-axis) coordinate values of a datum point, and collecting the three-axis coordinate values of the datum point by utilizing an RTK (real-time kinematic) carrier phase difference technology;
C. measuring the triaxial coordinate value of a tunnel secondary lining detection point, and measuring the triaxial coordinate value of the tunnel secondary lining detection point by using a total station on the basis of the triaxial coordinate value of a known reference point;
D. and analyzing the measurement result, obtaining the design coordinate values of the Y axis and the Z axis of a certain detection point in mat ab software according to the X axis coordinate value of the detection point, comparing the design coordinate values with the actually measured coordinate values of the Z axis and the Y axis, obtaining the offset difference value of the detection point, and further obtaining the thickness of the tunnel secondary lining and the offset difference value.
The total station and the RTK in the invention are all existing things, and are not described again.
The contour line of the tunnel secondary lining is composed of a single circle or a plurality of circles, a three-dimensional coordinate system is constructed, the origin of the coordinate system is determined by considering the actual measurement conditions on site, and the equation of the circles is determined according to the center coordinates, the radius and the range of each circle in the design data, so that the tunnel secondary lining standard function curve with a single section can be constructed.
And (4) stretching along the tunnel excavation direction by depending on a secondary lining standard function curve of a single section, and determining the three-axis coordinate value of any point on the surface of the secondary lining.
Monitoring points are distributed on the surface of the secondary lining, a total station is utilized to transfer the origin of coordinates to corresponding monitoring points, and on the basis, the monitoring points are measured to obtain three-dimensional coordinate values of the monitoring points; and sequentially measuring the plurality of monitoring points to obtain the three-axis coordinate values of the plurality of monitoring points, constructing a secondary lining actual profile curve, and comparing the secondary lining actual profile curve with a secondary lining standard function curve to obtain the position deviation value and the thickness deviation value of the tunnel secondary lining.
According to the design drawing of the tunnel, the invention establishes the function curve of the secondary lining outline of the tunnel, and the curve can well show the three-axis coordinate value of the design of the secondary lining outline point of the tunnel. And measuring the triaxial coordinate values of the detection points on the tunnel secondary lining by using instruments such as RTK (real-time kinematic), a total station and the like, comparing the designed triaxial coordinate values of each detection point on the function curve to obtain the difference value of the detection points and the function curve, and further obtaining the thickness difference value and the offset difference value of the tunnel secondary lining. According to the difference, tunnel constructors can modify the secondary lining of the tunnel so as to ensure the safety and quality reliability of the secondary lining.
The invention researches a method for accurately detecting the thickness of the secondary lining of the tunnel based on function curve fitting, solves the problems of insufficient thickness and position deviation of the secondary lining of the tunnel, and improves the accuracy of the thickness difference and the cheap difference. The method for detecting the secondary lining thickness of the tunnel by adopting the function curve fitting is closer to the engineering practice compared with the prior research, the obtained secondary lining thickness difference is more accurate, and the engineering quality of tunnel construction is improved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (7)
1. A method for accurately detecting the thickness of a tunnel secondary lining based on function curve fitting is characterized by comprising the following steps: the method comprises the following steps:
establishing a standard function curve of the secondary lining of the tunnel, and determining a design triaxial standard coordinate value of any point on the secondary lining outline curve;
collecting the three-axis coordinate value of the datum point, distributing monitoring points on the surface of the secondary lining, transferring the origin of coordinates to the corresponding monitoring points by using a total station, and measuring the monitoring points to obtain the three-dimensional coordinate value of the monitoring points; constructing a secondary lining actual contour curve, and comparing the secondary lining actual contour curve with a secondary lining standard function curve to obtain a position deviation value and a thickness deviation value of the tunnel secondary lining;
measuring the triaxial coordinate value of a tunnel secondary lining detection point on the basis of the triaxial coordinate value of the known reference point;
and obtaining Y-axis and Z-axis design coordinate values of corresponding detection points according to the X-axis coordinate values of the detection points, comparing the Y-axis and Y-axis design coordinate values with the Z-axis and Y-axis coordinate values which are actually measured, and calculating the offset difference of the corresponding detection points to obtain the tunnel secondary lining thickness and the offset difference.
2. The method for accurately detecting the thickness of the secondary tunnel lining based on the function curve fitting as claimed in claim 1, wherein: and establishing a function curve of the secondary lining outer contour of the tunnel according to the center coordinates and the radius of the tunnel in the design drawing.
3. The method for accurately detecting the thickness of the secondary tunnel lining based on the function curve fitting as claimed in claim 1, wherein: and acquiring the three-axis coordinate value of the datum point by utilizing a real-time dynamic carrier phase difference technology.
4. The method for accurately detecting the thickness of the secondary tunnel lining based on the function curve fitting as claimed in claim 1, wherein: and measuring the triaxial coordinate values of the detection points on the tunnel secondary lining by using a total station, comparing the designed triaxial coordinate values of each detection point on the function curve to obtain the difference value of the detection points and the function curve, and further obtaining the thickness difference value and the offset difference value of the tunnel secondary lining.
5. The method for accurately detecting the thickness of the secondary tunnel lining based on the function curve fitting as claimed in claim 1, wherein: the contour line of the tunnel secondary lining is composed of a single circle or a plurality of circles, a three-dimensional coordinate system is constructed, the origin of the coordinate system is determined by considering the actual measurement conditions on site, and the equation of the circles is determined according to the center coordinates, the radius and the range of each circle in the design data, so that the tunnel secondary lining standard function curve with a single section can be constructed.
6. The method for accurately detecting the thickness of the secondary tunnel lining based on the function curve fitting as claimed in claim 5, wherein: and (4) stretching along the tunnel excavation direction by depending on a secondary lining standard function curve of a single section, and determining the three-axis coordinate value of any point on the surface of the secondary lining.
7. A tunnel secondary lining thickness accurate detection system based on function curve fitting is characterized in that: executing on the processor or the memory, configured to execute the following instructions:
establishing a standard function curve of the secondary lining of the tunnel, and determining a design triaxial standard coordinate value of any point on the secondary lining outline curve;
collecting the three-axis coordinate value of the datum point, distributing monitoring points on the surface of the secondary lining, transferring the origin of coordinates to the corresponding monitoring points by using a total station, and measuring the monitoring points to obtain the three-dimensional coordinate value of the monitoring points; sequentially measuring the multiple monitoring points to obtain three-axis coordinate values of the multiple monitoring points, and constructing a secondary lining actual contour curve;
measuring the triaxial coordinate value of a tunnel secondary lining detection point on the basis of the triaxial coordinate value of the known reference point;
and obtaining Y-axis and Z-axis design coordinate values of corresponding detection points according to the X-axis coordinate values of the detection points, comparing the Y-axis and Y-axis design coordinate values with the Z-axis and Y-axis coordinate values which are actually measured, and calculating the offset difference of the corresponding detection points to obtain the tunnel secondary lining thickness and the offset difference.
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