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Method and system used for evaluating overbreak and underbreak of tunnel

A technology of over-under-excavation and tunneling, which is applied in earth-moving drilling, data processing applications, mining devices, etc., can solve problems such as affecting the overall stability of the tunnel structure, slow information feedback, and increase construction costs, achieving a wide measurement coverage, The effect of short work cycle and easy operation

Active Publication Date: 2018-03-06
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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Problems solved by technology

Over- and under-excavation not only increases the construction cost, but also causes local stress concentration in the surrounding rock and affects the overall stability of the tunnel structure
At present, the tunnel survey is carried out with a total station, but the accuracy of the total station can only reach 3 to 4 mm in the range of 20 to 30 meters, and the measurement accuracy is not high.
In addition, the total station is greatly affected by smoke and light, and has high requirements for the measurement environment
Moreover, the total station has too many links in information feedback, and the data information cannot be fed back to the construction site in a timely manner, and the information feedback is too slow
Only using total stations to measure is not efficient. In order to complete the tunnel project smoothly, an efficient and reliable evaluation method is very necessary in the evaluation of tunnel overbreak and underbreak

Method used

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  • Method and system used for evaluating overbreak and underbreak of tunnel
  • Method and system used for evaluating overbreak and underbreak of tunnel
  • Method and system used for evaluating overbreak and underbreak of tunnel

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0050] my country is a mountainous country, and tunnels occupy a large proportion in the construction of railways and roads in mountainous areas of our country. It is very necessary to carry out overbreak and underbreak tests on tunnels after excavation. Therefore, the present invention provides a method for evaluating the overbreak and underbreak conditions of a tunnel.

[0051] figure 1 A flow chart of a method for evaluating tunnel overbreak and underbreak conditions according to an embodiment of the present invention is shown.

[0052] Such as figure 1 As shown, in step S101, the tunnel is scanned by a scanner to obtain point cloud data of the tunnel. In order to master the parameters of the tunnel, it is necessary to first collect the d...

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Abstract

The present invention provides a method for evaluating overbreak and underbreak of a tunnel. The method comprises the following steps that the tunnel is scanned, point cloud data of the tunnel is obtained, and the point cloud data is preprocessed so as to obtain preprocessed data; basic data in the preprocessed data is extracted and compared with calibrated data in a construction design document,and the first evaluation result is obtained; overbreak data of the tunnel are calculated and obtained according to the preprocessed data and compared with the control standard, and the second evaluation result is obtained; according to the preprocessed data, the underbreak data of the tunnel is calculated and obtained and compared with the control standard, and the third evaluation result is obtained; the first evaluation result, the second evaluation result and the third evaluation result are comprehensively processed so as to obtain the final evaluation result. The method and system used forevaluating overbreak and underbreak of the tunnel can be used for evaluating overbreak and underbreak of the tunnel, the calculated overbreak data and the calculated underbreak data are compared withthe control standard, and tunnel engineering is evaluated.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a method and system for evaluating tunnel overbreak and underbreak conditions. Background technique [0002] During tunnel excavation, the phenomenon of over- and under-excavation is common. Over- and under-excavation not only increases the construction cost, but also causes local stress concentration in the surrounding rock and affects the overall stability of the tunnel structure. At present, the tunnel survey uses a total station for measurement, but the accuracy of the total station can only reach 3 to 4 mm within the range of 20 to 30 meters, and the measurement accuracy is not high. In addition, the total station is greatly affected by smoke and light, and has high requirements for the measurement environment. Moreover, the total station has too many links in information feedback, and the data information cannot be fed back to the construction site in time, and the infor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18E21F17/00G06Q50/02
CPCE21F17/00E21F17/18G06Q50/02
Inventor 马伟斌安哲立郭小雄邹文浩王志伟付兵先王勇马超锋柴金飞牛亚彬李尧赵鹏张文达常凯
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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