Full-automatic laser tunnel section convergence instrument and measuring method

Abstract

The invention discloses a full-automatic laser tunnel section convergence instrument and a measuring method. The full-automatic laser tunnel section convergence instrument comprises a laser ranging system, an acquisition and communication system (2) and a mounting and fixing system (3), wherein the laser ranging system comprises a plurality of laser ranging modules (11); the acquisition and communication system (2) comprises a central processing module, a data acquisition module, a data storage module, a data communication module, a power management module, a power interface (26) and a data interface (27); the mounting and fixing system (3) comprises a pedestal (31), a core plate (32), a frame plate (33), a cover plate (34) and an inclinometer (35); and the laser ranging modules (11) are fixed on the core plate (32), each laser ranging module (11) is connected with the data acquisition module through a data line, and the laser ranging modules (11) and the core plate (32) are arranged within the frame plate (33). The full-automatic laser tunnel section convergence instrument can be mounted on a tunnel vault or side wall conveniently, and achieve full-automatic tunnel section multi-point convergence monitoring and data transmission.

Description

technical field [0001] The invention relates to the field of tunnel deformation monitoring, in particular to a fully automatic laser tunnel section convergence instrument, which is suitable for long-term monitoring of the convergence deformation of railway and highway tunnel sections. Background technique [0002] In the construction and operation stages of tunnels and underground projects, the convergence deformation of tunnel sections is an important monitoring content. In the construction stage, the convergence deformation of the section reflects the stress state and stability of the tunnel structure and surrounding rock and soil under unloading conditions; while in the operation and maintenance stage, it reflects the performance evolution of the tunnel structure, which is the key to judging the safety and security of the tunnel structure. An important basis for operation and maintenance. [0003] The most commonly used tunnel section convergence measurement device is th...

AI Technical Summary

Problems solved by technology

The above three patent documents combine a single handheld laser rangefinder with a mechanical structure, which can only measure the deformation of the horizontal diameter or vertical diameter of the tunnel from point to point. This measurement mode cannot meet the needs of convergent deformation of the full-section tunnel.

[0005] Patent document CN103776359A discloses a tunnel convergence sensor based on microwave ranging, but this sensor needs to set a target on the inner wall of the tunnel. However, in long-term monitoring, it is impossible to ensure that the convergence deformation of the tunnel can make the microwave always hit the target

Patent document CN104613887A discloses a section settlement convergence analysis instrument, which includes a front and rear vertical measurement laser system and a semicircular surface laser ranging system, which can measure the convergence deformation of 19 measuring points on a section; patent document CN104792274A discloses a circular A measurement method for tunnel convergence deformation. This method uses a 3D laser scanner to obtain a 3D point cloud of the tunnel. After denoising the original data, the cylinder fitting algorithm is used to obtain the 3D convergence deformation of the tunnel, but this method is only applicable to circular tunnels; patent documents CN103335596A discloses a tunnel convergence displacement and vault settlement measurement device with a ball socket, which can complete the measurement of the entire tunnel convergence with only one measurement device

However, the technologies disclosed in the above four patent documents require a lot of manual on-site adjustment and operation, and cannot realize automatic long-term section monitoring

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