Advanced geological forecasting method of shield construction

Abstract

The invention relates to the field of advanced geological forecasting of shield tunneling construction and discloses an advanced geological forecasting method in shield tunneling construction processes and a system. The method comprises steps of acquiring reflecting waves and penetrated waves formed when earthquake waves generated by mechanical vibration of a shield tunneling machine during the construction process meet a reflecting interface in the preset position and preset direction so as to form an earthquake data file; using vibration signal data in the moving state of the shield tunneling machine; and carrying out data integration processing and analyzing, thereby forming, outputting and displaying images of front geological conditions of construction of the shield tunneling mechanism. The system can continuously acquire data in real time. There is no need to install devices on a knife disc of the shield tunneling machine. Compared with the prior art, limitation on installation of the devices is eliminated, detection precision can be effectively improved and detection distance can be effectively extended.

Description

technical field [0001] The invention relates to an advanced geological prediction method and system for shield tunneling construction. Background technique [0002] The construction method of tunnel boring machine has certain particularity and complexity, which brings huge difficulties to its advanced geological prediction. The specific performance is that the roadheader occupies most of the space behind the tunnel face, the site in front of the construction is very small, and the rotation of the cutter head in front needs to maintain a certain pressure, so the side wall behind the face basically does not have the ability to place advanced forecasting detection The conditions of excitation devices and sensors will bring certain difficulties to forecasting techniques, methods and device arrangements. For the earthquake method, the vibration of mechanical excavation is relatively large, and the impact is also great; for the electromagnetic method, the interference current and...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned technical problems and provide a method and system for advanced geological prediction of shield tunneling construction, which solves the limitation that the detection method needs to be installed on the cutterhead of the roadheader in the construction process of the existing roadheader. And problems such as low detection accuracy and short detection distance

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