Tunnel large-elevation-difference settlement measuring system

Abstract

The invention discloses a tunnel large-elevation-difference settlement measuring system, which comprises a liquid source water tank holding a liquid, more than one liquid pressure sensors, and a communicating pipe communicating the liquid source water tank and each liquid pressure sensor. Each liquid pressure sensor comprises a housing and more than one elevation-difference blocks. The portion, communicating the communicating pipe, of the bottom of the housing is defined as a liquid feeding port, and the liquid feeding port is connected to a went valve. An elastic pressure-sensitive element is pressed on and covers the inner bottom of the housing and the upper part of the liquid feeding port, and one elevation-difference block is arranged on the elastic pressure-sensitive element. According to the system, a pressure compensation means is utilized; when settlement measurement of a tunnel is performed in an environment, the inner space of which is limited, liquid levels of the liquid pressure sensors don't need to be adjusted to be uniform; transfer of overmuch relative datums is reduced; and at the same time, the system isn't limited by the elevation of a measurement point, and the measurement difficulty is lowered.

Description

technical field [0001] The invention relates to the technical field of tunnel settlement measurement, in particular to a large elevation difference settlement measurement system for tunnels. Background technique [0002] Settlement monitoring is an important monitoring content in building deformation monitoring. Settlement monitoring uses reasonable instruments and methods to measure the elevation change of the building in the vertical direction, which is reflected by the settlement of the monitoring points. Regularly and accurately measure the settlement of the monitoring points, the cumulative settlement, settlement difference, and average settlement rate of the monitoring points can be calculated, and the trend can be analyzed and predicted, and the local relative inclination and deflection can be further calculated. [0003] Precision leveling has high precision and simple method, and is the most commonly used method for settlement monitoring. This method is less affecte...

AI Technical Summary

Problems solved by technology

However, due to the complex geological structure in the tunnel, large elevation fluctuations, and limited internal space, it is difficult to satisfy the level of each liquid level at the same level, and for tunnels with a distance of more than 100 meters, it is necessary to deploy multiple static levels. The facility structure is complex, the project implementation is difficult to increase, and the measurement accuracy is low

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