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Tunnel convergence monitoring method

A tunnel and uniform technology, applied in the field of tunnel convergence deformation monitoring, can solve problems such as low work efficiency, inability to fully reflect the change of tunnel cross-section, and the lack of a good processing method for data.

Inactive Publication Date: 2008-08-20
上海地铁运营有限公司 +1
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Problems solved by technology

The disadvantage of this method is that it can only monitor the change of the chord length of the polygon composed of a limited number of points, and cannot fully reflect the change of the entire tunnel section.
In addition, when using this method to observe, the work efficiency is low, and there are certain risks
[0003] Recently, laser profilers or electronic total stations have been developed to test and monitor tunnel convergence. Some of these methods need to use reflective targets, which have disadvantages such as troublesome installation and one-sided measuring points. Moreover, the existing technologies only realize The data collection does not propose a good processing method for the measured data

Method used

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Embodiment Construction

[0020] like figure 1 As shown, the tunnel convergence monitoring method of the present invention mainly includes the measurement of cross-section data and the processing of measured data, and its implementation is described in steps as follows:

[0021] Step 101, arrange three reference points A, B and O on the same torus 8 of the section of the tunnel to be measured, where O is the point where the center of the measuring instrument is perpendicular to the ground, and the two points A and B are respectively on both sides of the section to be measured (See figure 2 );

[0022] Step 102, adjust the measuring instrument so that it rotates vertically from the reference point A on one side of the tunnel section to coincide with the reference point B on the other side of the section. From the outside to the inside of the tunnel, the vertical rotation is automatically measured according to the set step length; in addition, because the instrument rotates vertically in the tunnel fo...

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Abstract

The invention discloses a tunnel convergence monitoring method, which utilizes a measuring device to measure a tunnel section, inputs actually measured data to a computer so as to implement ellipse fitting processing, computes a fitted ellipse equation, determines the position of the section center, implements the elimination processing of parasitic error and random error of the measured data, computes the deformation degree of each measured point relative to the section center, and finally outputs a figure that is unfolded by taking the polar angle of the section center as horizontal axis to show the deformation degree of the tunnel section. The tunnel convergence monitoring method implements reasonable processing of the measured data of the tunnel section, can reflect the actual deformation situation of the tunnel section more veritably, and can be widely applied in the monitoring working of circular tunnel convergence.

Description

technical field [0001] The invention relates to tunnel convergence deformation monitoring in the field of geotechnical engineering. Background technique [0002] With the construction of a large number of traffic tunnels such as subway tunnels, the monitoring of tunnel convergence and deformation plays a very important role in traffic safety. The current conventional tunnel convergence measurement is carried out with a convergence ruler. This measurement method is generally to arrange several points on a tunnel section (cross section), and use a high-precision convergence ruler to measure the length of the chord formed by several points. , and then through the change of each chord length with time to understand the change of the tunnel section. The disadvantage of this method is that it can only monitor the change of the chord length of the polygon formed by a limited number of points, and cannot fully reflect the change of the entire tunnel section. In addition, when usin...

Claims

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Application Information

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IPC IPC(8): G01C7/06G01B21/20
Inventor 王如路马文亮张旭
Owner 上海地铁运营有限公司
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