A vehicle-mounted tunnel collapse monitoring and early warning system and method

Abstract

The present disclosure provides a vehicle-mounted tunnel collapse monitoring and early warning system and method, which can perform fully automatic real-time monitoring, data analysis and prediction of tunnel face protrusion degree, tunnel rock mass stability, etc., so as to warn the occurrence of landslides, a breakthrough Compared with the collapse early warning mode of conventional tunnel engineering hole clearance measurement and geophysical detection, the early warning mechanism is transferred to the information change of the protrusion degree and protrusion speed of the tunnel face, and the precise detection method is given, forming a new early warning scheme . The car body part is completely controlled by the control module, without manual adjustment and installation and disassembly of the device, which saves manpower and is simple and convenient to operate; it solves the technical problem of prediction and early warning of the deformation of the central axis of the tunnel face, and the positioning of the central axis of the device in the tunnel is realized. precise. It solves the disadvantages of large data error and limited displacement measurement around the tunnel in the previous tunnel rock mass deformation monitoring method, and realizes accurate measurement of the protrusion deformation of the tunnel face.

Description

technical field [0001] The present disclosure relates to a vehicle-mounted tunnel collapse monitoring and early warning system and method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] In the process of tunnel construction, complex geological conditions have brought great challenges to the safety of tunnel construction. Landslides are one of the most common geological disasters, which have caused delays in the construction period, damaged equipment, and brought economic losses to the country; even caused casualties and project scrapping. [0004] In order to avoid the occurrence of landslide accidents, technicians in the field solve the technical problems of landslide prevention and early warning from three perspectives: landslide disaster treatment, poor geological advance prediction, and tunnel clearance convergence monitoring measur...

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Problems solved by technology

[0005] However, as far as the inventor knows, to solve the problem of landslide prevention and early warning through the advance prediction of bad geology, there are mostly mutual assistance between the advance geological prediction and conventional construction monitoring and measurement, and it is difficult to avoid the occurrence of landslide disasters, and the monitoring and measurement in the advance prediction constitutes Some of them are dominated by the relative displacement around the tunnel, and the tunnel face is more prone to landslides due to poor support

[0006] The disadvantage of the method of preventing landslides by monitoring the relative displacement around the tunnel is that: monitoring the displacement through the deformation around the tunnel can monitor the precursory information of the collapse caused by the settlement of the vault and the convergence of the surrounding area, but many collapses begin to show precursory information from the excavation surface Therefore, this scheme is more used to monitor the support effect after support, and does not involve monitoring and early warning for the most dangerous face area after excavation. At the same time, the early warning mechanism of this method is the change of headroom convergence, but Tunnel excavation always produces a relatively rapid deformation stage, so the technical solution that simply uses the clearance convergence rate as the alarm threshold has the defect of delaying the construction period. Weak capacity is an important reason for tunnel engineering landslides

[0007] The method of monitoring the deformation of the tunnel face along the axial direction of the tunnel is used to predict the landslide. This method usually adopts the arrangement of reflective sheets along the tunnel face. The reflective sheets are perpendicular to the laser beam of the distance measuring device and are arranged at various positions Reflective sheet, the difference between the two measurements is the axial displacement of the tunnel face along the tunnel, which has the following defects: 1) Secondary lining must be applied to the rear of the tunnel. If secondary lining is applied, the laser range finder will be disassembled, resulting in Unable to monitor; manual adjustment, disassembly, and installation of distance measuring devices are required, which will inevitably disturb the distance measuring devices and cause large errors; a large number of distance measuring instruments need to be arranged along the tunnel wall, if they are arranged perpendicular to the reflectors on the tunnel surface , it takes up a lot of clearance behind the tunnel, making it impossible to construct in the front, and the construction trolley cannot drive in.

[0008] To sum up, the above-mentioned methods have relatively large limitations and deficiencies in the early warning process of tunnel collapse

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