Sprayed concrete and surrounding rock fracture detection device and method

A technology of shotcrete and detection device, which is applied to measurement devices, analysis of solids using sonic/ultrasonic/infrasonic waves, and material analysis using sonic/ultrasonic/infrasonic waves, etc. The damage of shotcrete and surrounding rock cannot be detected, and the whole process evolution of fracture damage cannot be clearly understood.

Active Publication Date: 2020-08-04
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the current detection devices for fracture damage of shotcrete and surrounding rock can only observe the development process of apparent cracks, but cannot detect the damage inside shotcrete and surrounding rock.
At the same

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  • Sprayed concrete and surrounding rock fracture detection device and method
  • Sprayed concrete and surrounding rock fracture detection device and method
  • Sprayed concrete and surrounding rock fracture detection device and method

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Embodiment Construction

[0032] In order to better understand the essence of the present invention, the present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0033] The invention belongs to the field of concrete structures and materials, and is especially suitable for the detection of shotcrete and surrounding rock fractures. The specific embodiment structure is as follows Figure 1 to Figure 4 As shown, it includes a plurality of detection units, an extensometer 7 and a prefabricated seam 6 . The detection unit is installed on both sides of the prefabricated seam 6, and the extensometer 7 is installed at the prefabricated seam 6. The detection unit includes a bracket, an ultrasonic emitting device 10 and an ultrasonic receiving device 11 . The ultrasonic emitting device 10 and the ultrasonic receiving device 11 are installed on the bracket, and are sealed and fixed by the sensor cap 9 . The bracket includes an iron ferrule and a bayo...

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Abstract

The invention discloses a sprayed concrete and surrounding rock fracture detection device. The detection device comprises a plurality of detection units, an extensometer and a prefabricated joint. Thedetection units are located on two sides of the prefabricated joint, and the extensometer is installed at the prefabricated joint. Each detection unit comprises a bracket, an ultrasonic transmittingdevice and an ultrasonic receiving device; and the ultrasonic transmitting device and the ultrasonic receiving device are mounted on the bracket. The device can be used for detecting damage in the sprayed concrete and the surrounding rock. The invention further discloses a sprayed concrete and surrounding rock fracture detection method, on the basis of ensuring a lossless state, a crack initiationtime point of sprayed concrete and surrounding rock fracture can be measured, and then whole-process evolution of fracture damage is obtained.

Description

technical field [0001] The invention relates to a detection device and detection method for shotcrete and surrounding rock fractures, belonging to the field of concrete structures and materials. Background technique [0002] During the construction of water tunnels, shotcrete is widely used in the construction method of the construction site support structure due to its fast and effective advantages. However, since the bonding structure between shotcrete and surrounding rock is the main weak link of the entire lining structure, the interaction between surrounding rock and shotcrete is a key issue in tunnel construction, which is directly related to the tunnel construction process and service period. Security, stability. The geological conditions of the tunnel are complex and varied, and the surrounding rock, which is part of the lining structure of the water conveyance tunnel, will inevitably have initial damage during the tunnel excavation process. And under the complex s...

Claims

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Application Information

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IPC IPC(8): G01N29/07G01N29/22
CPCG01N29/07G01N29/223G01N2291/0232G01N2291/011G01N2291/106
Inventor 陈徐东胡良鹏郭玉柱程熙媛
Owner HOHAI UNIV
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