Pore water pressure measuring device in foundation stabilization zone

Abstract

The invention relates to a foundation under embankment inner pore water pressure measurement device which consists of a pore water pressure sensor, a sensor cable, a secondary instrument and a data automatic collection system; before soil reinforcement, the pore water pressure sensor is embedded through a method which conforms to relevant technical specifications, codes and design requirements, the sensor cable is led outside the foundation under embankment to protect the joint with the secondary instrument, and then the soil is reinforced through a preset reinforcing method; during the reinforcement process, the data automatic collection system connected with the secondary instrument can be adopted to sense the pressure of the pore water pressure sensor according to a certain frequency, so as to measure the internal pore water pressure of the soil in real time in different phases and different pressure ranges.

Description

technical field [0001] The invention relates to a measuring device for pore water pressure in a foundation reinforcement area in foundation engineering. In particular, it relates to the measurement of pore water pressure under the conditions of vacuum preloading, combination of surcharge and vacuum preloading, and foundation treatment and reinforcement area by vacuum dewatering plus vibration method, and the range of pore water pressure changes from positive pressure to negative pressure. Background technique [0002] The change of pore water pressure is one of the important parameters that need to be measured in the ground treatment of vacuum preloading, combined surcharge and vacuum preloading, and vacuum dewatering plus vibration. On the one hand, the change of pore water pressure can reflect the adoption of various reinforcement measures The formation, dissipation and vacuum transmission of excess pore water pressure in the soil during the treatment of the foundation can...

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Problems solved by technology

[0004] The problem to be solved by the purpose of the present invention is: to overcome the current vacuum preloading, combined use of surcharge and vacuum preloading, and in the foundation treatment of vacuum dewatering plus vibration method, the excess pore water pressure, the vacuum degree of the soil surface and the negative pressure condition The measurement of the groundwater level under the ground needs to be measured by different methods and devices, and the defect of real-time continuous measurement cannot be realized. To develop a device for measuring pore water pressure in the vacuum preloaded foundation reinforcement area, it can realize the use of a The sensor achieves the purpose of real-time continuous measurement of excess pore water pressure, vacuum degree of soil surface and groundwater level under negative pressure conditions

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