Real-time dynamic monitoring device and monitoring method for soil sampling sand content of underwater open caisson

Abstract

The invention discloses a real-time dynamic monitoring device and method for the soil sampling sand content of an underwater open caisson. The real-time dynamic monitoring device comprises a drainage device and a monitoring device, wherein the drainage device is communicated with a side wall of an open caisson soil sampling main pipeline; the monitoring device comprises an incident probe and an emergent probe which are arranged on the two sides of the drainage device, the incident probe is connected with a light source through an incident optical fiber, and the emergent probe is connected with a spectrum detector through an emergent optical fiber; incident light emitted by the light source is transmitted to the incident probe through the incident optical fiber and then enters to-be-detected liquid in the drainage device, and modulated light transmitted from the to-be-detected liquid is absorbed by the emergent probe and then is transmitted to the spectrum detector through the emergent optical fiber. The sand content of the to-be-measured liquid can be dynamically measured in real time on an engineering site, the structure is simple, and measurement precision is high.

Description

technical field [0001] The invention relates to the technical field of sand content measurement. More specifically, the present invention relates to a real-time dynamic monitoring device and monitoring method for sand content in caisson soil in water. Background technique [0002] Sand content monitoring has always been an indispensable monitoring content in water area management, underwater construction, bridge construction, caisson construction and other engineering fields. Especially in the process of civil engineering, the real-time monitoring of the sand content of the water outlet pipe mouth during caisson soil extraction can provide real-time data for the accurate calculation of caisson soil extraction efficiency. Existing technical methods for measuring sand content include drying method, vibration method, photoelectric method and so on. Among them, the measurement result of the drying method is accurate, but the steps are cumbersome, which is suitable for the meas...

AI Technical Summary

Problems solved by technology

The photoelectric method generally judges the sand content in water by measuring the transmitted light intensity, scattered light intensity or reflected light intensity of the beam, but the measurement accuracy of the transmitted light, scattered light and reflected light intensity is easily affected by the sand content, and both For static measurement of water bodies, real-time dynamic monitoring cannot be realized

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