Method for improving precision of opposite side measurement for settlement of tunnel vault

A vault sinking and side-to-side measurement technology, which is applied in height/level measurement, measuring devices, surveying and navigation, etc., to achieve the effect of easy execution, comprehensive results and intuitive results

Inactive Publication Date: 2015-12-23
CHANGAN UNIV
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are relatively few researches on the measurement accuracy of this measurement method at present, and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving precision of opposite side measurement for settlement of tunnel vault
  • Method for improving precision of opposite side measurement for settlement of tunnel vault
  • Method for improving precision of opposite side measurement for settlement of tunnel vault

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example

[0042] Taking the horizontal convergence measurement of the maximum excavation line of the large-section three-lane loess highway tunnel of the Shenmu-Fugu Expressway in Shaanxi Province as an example, a detailed introduction will be given.

[0043] When the measuring point is buried, the pre-processed steel plate is first used as the base of the reflective diaphragm and welded to the vault position near the first steel arch of the tunnel face after the tunnel excavation, namely figure 1 Point A shown corresponds to the position. Then, paste the reflective film on the fixed steel plate, such as image 3 Shown. After the reflective film is pasted, wrap the geotextile on the measuring point and wrap it with tape (such as Figure 4 (Shown) to protect the reflective diaphragm from contamination and damage during shotcrete.

[0044] According to the actual cross-section size of the large-section three-lane highway tunnel, the vertical height from the monitoring point to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for improving the measurement precision of the settlement amount of a tunnel vault, in particular to a method for improving the precision of opposite side measurement for the settlement of the tunnel vault. According to the method, a total station opposite side measuring method is adopted, and the measuring precision is improved by selecting a reasonable rearview point and a total station arrangement position based on the practical measurement situation of the amount of field tunnel vault settlement. The method comprises the steps that firstly, a monitoring point is embedded in the vault position of a monitoring section and is protected so as to prevent the monitoring point from being influenced and damaged in tunnel construction; secondly, a reasonable position is selected to embed a rearview reference point; thirdly, the erecting position of a total station is selected according to the horizontal distance between the embedded rearview reference point and the monitoring point; finally, measuring data are read through the opposite side measuring function of the total station, and protection on the monitoring point and the rearview point is restored after every time measurement is completed.

Description

1. Technical field: [0001] The invention relates to a method for improving the measurement accuracy of the tunnel vault sinking, in particular to a method for improving the measurement accuracy of the tunnel vault sinking on the opposite side. 2. Background technology: [0002] Vault sinking is a must-test item for tunnel monitoring and measurement, and its importance is self-evident. At present, the vault settlement of highway tunnels is mainly measured by precision level instruments, but this measurement method is labor-intensive, low in efficiency, and often interferes with on-site construction. For example, when the tunnel is excavated circularly with the core soil left in the arch, before the core soil is excavated, due to the blockage of the core soil, the level gauge and steel ruler cannot be used to effectively read the data, resulting in a lag in the initial measured value, thus losing a part Even a large part of the deformation information of the tunnel surroundin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 罗彦斌陈建勋赵鹏宇李居柱刘同展
Owner CHANGAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap