Monitoring device and method for measuring water pressure outside lining of deeply-buried tunnel

Abstract

The invention belongs to the field of lining water pressure measurement, and provides a monitoring device and method for measuring a water pressure outside a lining of a deeply-buried tunnel. The device comprises a drill hole and an osmometer, and the drill hole is drilled in the middle of the side wall of the deeply-buried tunnel in the horizontal direction and extends out of an underground waterweak disturbance area. The osmometer is distributed and buried along the interior of the drill hole, and the exterior of each osmometer is wrapped and compacted through medium-coarse sands. Osmometerdata at different positions of the deeply-buried tunnel are input into far-field water head models corresponding to the different positions, calculation is conducted respectively, distributed monitoring of underground water at the different positions of the deeply-buried tunnel is achieved, and the problem that after the tunnel is excavated, space-time rule monitoring of underground water is notcomplete due to the fact that the underground water is affected by excavation is solved. A scientific basis is conveniently provided for design and calculation of the deeply-buried tunnel lining structure, and important guarantee is provided for long-term safe operation of a deeply-buried tunnel engineering structure.

Description

technical field [0001] The invention relates to the field of lining water pressure measurement, in particular to a monitoring device and method for measuring the water pressure outside the lining of a deep-buried tunnel. Background technique [0002] In the construction of some mountain tunnels, the buried depth of the tunnel is large, the tunnel passes through the water-rich area, and the water head is high, such as the Yuanliangshan Tunnel and Jinping Traffic Tunnel, how to carry out the tunnel safely and reliably without affecting the ecological environment One of the key issues in design, construction and operation is how to determine the water pressure on the lining. [0003] At present, in the calculation of tunnel lining water load, the railway and transportation departments have not formulated a unified specification, and most of them still refer to hydraulic tunnel design specifications and empirical methods. magazine. Lining water loads in hydraulic tunnels gener...

AI Technical Summary

Problems solved by technology

[0011] In order to solve the technical problem of incomplete monitoring of the temporal and spatial laws of groundwater affected by excavation after tunnel excavation, the present invention provides a monitoring device and method for measuring the water pressure outside the lining of deep buried tunnels, which realizes the monitoring of groundwater in different positions of deep buried tunnels. Distributed monitoring is beneficial to provide a scientific basis for the design and calculation of the deep tunnel lining structure, and provide an important guarantee for the long-term safe operation of the deep tunnel engineering structure

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