Device capable of repeatedly utilizing pore water pressure gauges and manufacturing method of device

Abstract

The invention discloses a device capable of repeatedly utilizing pore water pressure gauges. The device comprises a plurality of steel pipes arranged from top to bottom. A filter pipe is arranged between every two adjacent steel pipes. The upper end and the lower end of each filter pipe are connected and fixed to the two corresponding steel pipes respectively through two connecting sleeves so as to form a pipe structure of the whole device. A bottom end sleeve is arranged at the bottom of the steel pipe at the lowest end of the pipe structure, and a top end sleeve with an opening in the upper portion is arranged on the top of the steel pipe at the uppermost end of the pipe structure. Holes are formed in the side walls of the filter pipes of the pipe structure. The side walls of the filter pipes are wrapped by non-woven fabric. Each filter pipe is internally provided with one pore water pressure gauge. Wires of the pore water pressure gauges are led out of the opening in the upper portion of the top end sleeve. According to the device, the multiple pore water pressure gauges are embedded in one single drill hole. Meanwhile, the device is convenient to assemble and disassemble, and it can be guaranteed that the pore water pressure gauges are not damaged in the monitoring process. The invention further discloses a manufacturing method of the device capable of repeatedly utilizing the pore water pressure gauges.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a reusable pore water pressure gauge device and a manufacturing method thereof. Background technique [0002] In the process of soft soil foundation treatment, pore water pressure is monitored by using pore water pressure gauges. The general method is to drill holes into the soft soil layer and embed pore water pressure gauges for monitoring. Some use multiple pore water pressure gauges buried in a single borehole. The existing problem of the piezometer is that the buried position of the pore water piezometer is not accurate, and the sealing material is difficult to form an effective water-repelling layer, which leads to the invalidation of the monitoring results. Some pore water piezometers are buried in one hole. The problem is that the monitoring data of multiple measuring points do not belong to the same vertical plane, and it takes more time and manpower to bury the instrume...

AI Technical Summary

Problems solved by technology

[0002] In the process of soft soil foundation treatment, pore water pressure is monitored by using pore water pressure gauges. The general method is to drill holes into the soft soil layer and embed pore water pressure gauges for monitoring. Some use multiple pore water pressure gauges buried in a single borehole. The problem of the pressure gauge is that the burying position of the pore water pressure gauge is not accurate, and the sealing material is difficult to form an effective water-resistant layer, which leads to the failure of the monitoring results

Some are burying a pore water pressure gauge in one hole. The problem is that the monitoring data of multiple measuring points do not belong to the same vertical plane, and it takes a lot of time and manpower to bury the instrument.

In addition to the above common problems, there is also the problem that the pore water piezometer is easily damaged during use and cannot be reused. For the monitoring of large-area soft soil foundation treatment, if the pore water piezometer can be effectively buried, protected and Recycling is important

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