Roadbed settlement monitoring system

Abstract

The invention relates to a roadbed settlement monitoring system comprising an antifreezing settlement meter and an automatic data tester, wherein the antifreezing settlement meter and the automatic data tester are connected by a data transmission cable. The antifreezing settlement meter comprises a settlement plate, an inductive displacement sensor, a telescopic joint, a measuring rod, a heating tube and an anchor head, wherein the measuring rod is connected above the anchor head, the heating tube is arranged outside the measuring rod, a spiral electric heat alloy wire is axially arranged on the heating tube which is connected with an external power source, the measuring rod is connected with the electric inductance type displacement sensor through the telescopic joint, the electric inductance type displacement sensor is fixed at the lower side of the settlement plate, the output end of the electric inductance type displacement sensor is connected with the input end of the automatic data tester, the automatic data tester sends measurement data to a remote computer through long-distance transmission through a communication device and a base station, and therefore remote settlement real-time monitoring operation as well as data acquisition and analysis of a plurality of measuring point are realized.

Description

technical field [0001] The invention relates to foundation settlement monitoring technology, in particular to a roadbed settlement monitoring system in cold regions. Background technique [0002] Subgrade settlement monitoring is an important part of railway and highway engineering technology, which is related to the normal development and safety protection of railway operation and road transportation. At present, subgrade layered settlement monitoring generally uses a single-point settlement meter, which is fixed within the depth range of the soil to be measured, and the settlement data of the compressed layer is collected manually or automatically, and the soil at the depth to be measured is obtained by further processing the data. the settlement value. [0003] figure 1 The single-point settlement meter of the prior art is composed of a settlement plate 1, an inductive displacement sensor 2, a telescopic joint 3, a measuring rod 4, a protection tube 5 and an anchor head...

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Problems solved by technology

[0004] However, the single-point settlement meter of the prior art is only suitable for subgrade settlement observation in general non-cold regions, and cannot eliminate the influence of frost heave deformation on subgrade settlement in permafrost regions

Subgrade frost heave is a unique failure phenomenon of subgrade in permafrost areas. Since the subgrade settlement is accompanied by the freezing and thawing of the subgrade surface soil, the measured value of the ordinary single-point settlement meter is the difference between the subgrade settlement value minus the subgrade surface freeze-thaw settlement value. , it is difficult to study subgrade settlement and frost heave deformation independently by monitoring with subsidence meters

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