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Large circle shield tunnel diameter resolving method

A technology for shield tunneling and calculation, which is applied in the direction of measuring devices, instruments, and optical devices, etc., can solve problems such as fitting and solving diameter convergence value, tunnel section failure, blocking the uplink and downlink visibility of large circular shield tunnels, etc. Achieve the effect of simple solution method, wide application range and high precision

Active Publication Date: 2017-10-20
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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Problems solved by technology

At the beginning of the design of the large circular shield tunnel, the middle partition wall structure was poured for tunnel safety considerations, which blocked the uplink and downlink visibility of the large circular shield tunnel, so the diameter convergence value of the tunnel section could not be calculated by ellipse fitting

Method used

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  • Large circle shield tunnel diameter resolving method

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Embodiment

[0020] Embodiment: In this embodiment, the method for calculating the diameter of the large circle shield tunnel is used to calculate the convergence value of the diameter of the large circle shield tunnel. Such as figure 1 As shown, the large circular shield tunnel 1 includes a left passage 2 and a right passage 3 as up and down lines respectively, and an intermediate partition wall 4 arranged between the left passage 2 and the right passage 3 for separation.

[0021] The method for calculating the diameter of a large circular shield tunnel includes the following steps:

[0022] 1) Use 3D laser scanning technology to obtain the scanning point information of the section of the large circular shield tunnel, and obtain the coordinate information of the cross-section scanning points of the left channel 2 (marked as L in the figure) and the right channel 3 (marked as R in the figure), such as figure 2 shown.

[0023] 2) Process the diameter convergence value of the left channel...

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Abstract

The invention relates to the field of tunnel structure deformation observation technology, and particularly to a large circle shield tunnel diameter resolving method. The resolving method is characterized by comprising the following steps of acquiring large circle shield tunnel section scanning point information by means of three-dimensional laser scanning technology; processing a left cannel diameter convergence value, fitting arc segment scanning data, fitting linear segment scanning data and calculating left channel convergence value; similarly processing a right channel diameter convergence value; and performing calculation according to the diameter convergence value of the left channel, the diameter convergence value of the right channel and a middle baffle wall thickness designed value. The large circle shield tunnel diameter resolving method has advantages of high suitability for diameter resolving of the large circle shield tunnel, wide application range, simple resolving method and high precision of the diameter convergence value which is obtained through resolving.

Description

technical field [0001] The invention relates to the technical field of tunnel structure deformation observation, in particular to a method for calculating the diameter of a large circular shield tunnel. Background technique [0002] Convergence monitoring is an effective method for tunnel engineering safety monitoring. At present, the convergence monitoring methods commonly used in shield tunnels include the convergence meter monitoring method, the total station automatic monitoring method, the total station free station setting method and the three-dimensional laser scanning monitoring method. The first three methods have high requirements for pre-monitoring preparation work and high cost of manpower and material resources, while the three-dimensional laser scanning monitoring method is fast and accurate, and it is an inevitable trend in the convergence monitoring of shield tunnels in the future. [0003] The original design shape of the cross-section of the large circular...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/08
Inventor 高志强侯敬宗郭春生王令文许正文刘碟
Owner SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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