An adaptive positioning device for tunnel geological advance forecast radar antenna

Abstract

The invention discloses a tunnel geological advanced prediction radar antenna adaptive position-adjusting device comprising an adaptive part and a motion part. The adaptive part is mainly used to automatically control the pressure between a radar antenna and a working face. The motion part is composed of a walking device and an elevator, and is mainly used to control up-and-down and left-and-right motion of the adaptive part. By adopting the device, the pressure between a radar antenna and the working face of a tunnel can be automatically kept at a stable value, and the pressure value neither changes because of the bumpy working face of the tunnel nor changes as the distance between a measuring vehicle and the working face of the tunnel changes. The radar antenna can move freely on the working face in the horizontal and vertical directions, and the whole area of the working face can be measured.

Description

technical field [0001] The invention belongs to the field of tunnel construction, and in particular relates to a tunnel geological advanced forecast radar antenna self-adaptive position adjustment device. Background technique [0002] Tunnel construction is a concealed project, and the unpredictability in design and construction is greater than other projects. In order to avoid geological disasters such as water gushing, gas outburst, rockburst, and large deformation in front of the tunnel face during the construction process, ensure the safety and smooth progress of the construction , before tunnel excavation, it is necessary to make an advance forecast of the surrounding rock in front of the tunnel face. There are various methods for face forecasting, among which the most common method is to use ground radar for geological forecasting. [0003] At present, two methods are basically used in the advance prediction of the tunnel face by geological radar: (I): manual measurem...

AI Technical Summary

Problems solved by technology

[0006] ① The contact between the radar antenna and the tunnel face is unstable, the radar antenna curve advances, and the radar antenna tilts forward; ② When the height of the tunnel surface to be measured is high, it will be very difficult to measure manually; ③ Personnel in front of the tunnel It's not safe to stay in the face for too long

④ When repeated measurement, manual measurement is easy to be tiring;

[0007] Method (II) has the following disadvantages: due to the unevenness of the palm surface, the traditional support for the radar antenna on the measuring vehicle does not use an adaptive system, so it is very easy to get stuck at the raised position of the palm surface

In addition, since the distance between the measuring vehicle and the tunnel surface is easily changed during the measurement process, it may also cause the radar antenna to be stuck or not in close contact with the tunnel surface.

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