Underground preloading settlement monitoring system

Abstract

The invention relates to the technical field of geotechnical engineering monitoring, and discloses an underground preloading settlement monitoring system, which is arranged in a to-be-detected foundation soil layer and comprises a testing hole, a fixed rod, a signal cable, a settling tray, a liquid storage tank, a vibration wire type pressure sensor and a data receiving terminal, wherein the testing hole is formed in the to-be-detected foundation soil layer and the lower end of the testing hole stretches into a stable soil layer; the fixed rod is arranged in the testing hole and the lower end of the fixed rod is connected to the stable soil layer; the vibration wire type pressure sensor is arranged on the fixed rod; the settling tray is arranged in an orifice in the upper end of the testing hole; the liquid storage tank is arranged on the lower surface of the settling tray; a pressure pipe is connected o the liquid storage tank; the vibration wire type pressure sensor is connected to the tail end of the pressure pipe; and the data receiving terminal is in communication with and connection with the vibration wire type pressure sensor so as to acquire an electric signal of the vibration wire type pressure sensor. The settlement monitoring system disclosed by the invention is free of influence on the construction and traffic capacity of surface boats, and is safe and high in stability.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering monitoring, in particular to an underwater surcharge preloading settlement monitoring system. Background technique [0002] The surcharge preloading method is often used in the treatment of underwater soft soil foundations. During the surcharge preloading process, the settlement of the foundation soil plays an important role in determining the unloading time of the surcharge preloading and evaluating the reinforcement effect of the foundation soil after preloading treatment. At present, most of the surface settlement observations of surcharge preloading first bury the settlement plate in the reinforcement area, and use the regular observation of the level to grasp the settlement of the ground surface; PVC pipe, set the magnetic ring layered on the PVC pipe, put the probe of the layered settlement instrument into the PVC pipe, the probe measures the position of the magnetic ring th...

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Problems solved by technology

[0003] The above-mentioned settlement observation method has been widely used in land preloading method foundation treatment, but in the underwater surcharge construction, both the surface settlement plate and the layered settlement instrument need to be exposed to the water surface for observation, but if they are all exposed to the water surface, it will definitely affect During the construction and passage of ships on the water, and in the deep and rough ocean environment, the monitoring instruments are easily damaged, and the measurement accuracy is also difficult to guarantee

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