Maintainable tunnel lining water pressure and displacement monitoring system

Abstract

The invention relates to a maintainable tunnel lining water pressure and displacement monitoring system. With the system, a maintenance problem of the monitoring system is solved effectively; and a water pressure value at the back of tunnel lining and an absolute displacement value of an inverted arch filling surface in a tunnel can be provided in real time, so that the safe training driving can be guaranteed. Monitoring sections are arranged at intervals along a tunnel extending direction; water pressure monitoring devices, displacement monitoring devices, wireless data employing instruments, and repeaters are arranged on all monitoring sections; the water pressure monitoring devices are arranged above drainage blind ditches at the two sides beyond tunnel lining; and the displacement monitoring devices are arranged at an inverted arch layer and a central ditch part above the inverted arch segment of tunnel lining. The water pressure values, detected by the water pressure monitoring devices, at the back of tunnel lining and lifting displacement values, detected by the displacement monitoring devices, of the inverted arch segment of tunnel lining are transmitted to the corresponding wireless data employing instruments; and then the data are transmitted to a monitoring center by the repeaters.

Description

technical field [0001] The invention relates to a drainage type tunnel lining hydraulic pressure and displacement monitoring system, which is particularly suitable for the scheme of the tunnel lining hydraulic pressure and displacement monitoring system in high-pressure water-rich karst areas. Background technique [0002] Conventional mountain tunnels are generally designed with a drainage system. During the operation of the tunnel, the tunnel lining structure does not bear water pressure. However, in order to protect the original ecological environment of the ground in some areas with environmental requirements, the tunnel cannot adopt a drainage scheme. At this time, the tunnel structure must bear Hydrostatic pressure effect. In addition, under special geological conditions, although the tunnel is designed with a drainage system, there may be a large water pressure behind the tunnel lining in a short period of time. For example, after long-term rainfall on the surface, t...

AI Technical Summary

Problems solved by technology

The existing monitoring scheme has two major defects during the operation of the tunnel: one is that the water pressure monitor is installed behind the lining and cannot be replaced, and the service life of the water pressure gauge under the existing technical conditions is generally not high, so it cannot be guaranteed The long-term reliability of the water pressure gauge, especially once the water pressure gauge fails, cannot be replaced. Therefore, in terms of system reliability and maintainability, it cannot meet the actual needs of long-term monitoring during operation; the second is the tunnel displacement monitoring system The monitoring is all relative displacement, and the absolute displacement of the tunnel inverted arch cannot be monitored, so it is impossible to give a direct early warning on whether to limit the speed of high-speed trains

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