Auxiliary device and working method applicable to advance forecast of tunnel geological radar method

Abstract

The invention discloses an auxiliary device and a working method applicable to advance forecast of a tunnel geological radar method, the auxiliary device comprises flexible railways, a radar antenna carrying unit and a power providing unit, the flexible railways are arranged on the two sides of a geological forecast line, and is fixed on a tunnel face, the radar antenna carrying unit comprises a pulley and radar antenna clamping units, the pulley and the radar antenna clamping unit are connected through a detachable shock absorber, the radar antenna carrying unit is free to slide on the flexible railways through the pulleys after provided with the radar antenna, the power providing unit receives and controls the movement and fixation of the radar antenna carrying unit on the flexible railways according to the control instruction, and makes the radar antenna carrying unit reach the specified location of the geological forecast line.

Description

technical field [0001] The invention relates to an auxiliary device and a working method suitable for the advanced prediction of the tunnel geological radar method. Background technique [0002] In order to ensure the safety of tunnel excavation, survey methods such as drilling and geophysical prospecting are usually used to forecast the geological conditions in front of the tunnel face in advance, and to provide information on the engineering geological conditions and hydrogeological conditions of the surrounding rock in front of the face before construction. , so as to effectively avoid the occurrence of tunnel geological disasters such as water and mud gushing, rockburst, and landslides during the construction process, provide guidance for the further excavation of the tunnel, and ensure the construction progress and safety. Tunnel advanced geological prediction methods mainly include TSP advanced prediction technology, TST advanced prediction technology, infrared water d...

AI Technical Summary

Problems solved by technology

[0005] First, the disadvantages and deficiencies of using the artificial lifting radar antenna for measurement mainly include: ①When the artificial lifting radar antenna is moving, the broken rock blocks and accumulated water generated by the excavation of the tunnel under the tunnel face make it difficult for the surveyors to move forward ; ② Long-term human lifting and multiple measurements will consume a lot of physical strength of the surveyors; ③ The environment in the tunnel is noisy, and the surveyors who lift the radar antenna cannot hear the travel instructions of the personnel operating the digital control unit in time

The existence of the above problems will directly cause the radar antenna to be unable to ensure a uniform speed, and it is also unable to ensure the close fit between the radar antenna and the tunnel face, so that the geological conditions in front of the tunnel face cannot be accurately predicted, which will have a great impact on the further construction safety of the tunnel

In addition, the safety of surveyors who are located under the face for a long time cannot be effectively guaranteed

[0006] Second, the disadvantages and deficiencies of using mechanically supported radar antennas for measurement are mainly as follows: (1) Machinery composed of metal materials often interferes with the detection results of the ground radar, thus affecting the accuracy of the ground radar forecast. Distinguishing the interference signal from time to time will also consume a lot of manpower and time, which will seriously affect the efficiency of geological advance prediction and the progress of tunnel construction; Affects the accuracy of signal acquisition; ③The excavation area of ​​the tunnel face is narrow, and the radar antenna supporting machinery is difficult to deploy, which affects the efficiency of geological prediction

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