Tunnel vault settlement monitoring system device based on isostatic surface principle and measuring method

Abstract

The invention relates to the technical field of tunnel construction survey, in particular to a tunnel vault settlement monitoring system device based on an isostatic surface principle and a measuringmethod. The tunnel vault settlement monitoring system device based on the isostatic surface principle comprises a tunnel, wherein the tunnel comprises a tunnel vault, a tunnel entrance and a tunnel exit; a plurality of steel bar pile hanging rings are mounted on the tunnel vault; an observation point device is mounted each the steel bar pile hanging ring; the observation point device comprises anobservation box; a water inlet valve and a water outlet valve are arranged on the lower part of the observation box; a hydraulic sensor is arranged inside the observation box; a flat pressure valve and a cable notch are formed in the upper part of the observation box; a measurement starting point device is mounted outside the entrance or the exit of the tunnel; a hydraulic sensor is arranged inside a benchmark slot; the benchmark slot, a water tank and the water inlet valves of the observation point devices are connected through a pipeline; the hydraulic sensors of the observation point devices and the hydraulic sensor of the measurement starting point device are connected in parallel through cables and are connected into an acquisition unit.

Description

technical field [0001] The invention relates to the technical field of tunnel construction prototype safety monitoring, in particular to a tunnel vault subsidence monitoring system device and measurement method based on the principle of equal pressure surfaces. Background technique [0002] The subsidence process of the tunnel vault and its final settlement are the important basis for the design of the tunnel support and the control of the stratum environment. Therefore, in order to ensure the safe construction of the tunnel and grasp the overall stability of the tunnel in time, it is necessary to carry out the subsidence of the tunnel vault. monitor. For the subsidence monitoring of the vault of underground tunnels, the conventional methods mainly include: 1) Measure the displacement of three convergent measuring points on the vault and the arch feet on both sides, and assume that there is no vertical displacement at the arch feet measuring points, and convert them in the p...

AI Technical Summary

Problems solved by technology

To sum up, conventional methods can only be used for manual observation. During monitoring operations with large spans and high tunnels and high sections, it may be difficult to erect a leveling rod or hang a steel ruler, or the distance between convergence measuring points is too large, and the measurement error of the convergence reading instrument is large or Exceeding the measurement range of the instrument, or due to the large construction dust, it is difficult to find the cross center mark of the reflective sheet or the measurement error of the optical instrument is large

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