Device and setting method for measuring underground water level of vacuum drainage prepressing sealing membrane

Abstract

The invention discloses a device and setting method for measuring the underground water level of a vacuum drainage prepressing sealing membrane. The device is composed of water level sighting tubes embedded in drill holes. A stainless steel guide rod for displacement of a magnetic floating ball is arranged in an airtight water level pipe, a reed pipe-resistance sensing component is arranged in an inner cavity of the stainless steel guide rod, a data line is led out through a sealing screw structure on the top of the stainless steel guide rod, a fixing and limiting flange is arranged at the top end of the stainless steel guide rod, and a lower end limiter is arranged at the lower end of the stainless steel guide rod. A sealing top cover and a line outgoing device are arranged at the top end of the airtight water level pipe. The data line is connected with a liquidometer electrical signal receiving and reading instrument through the line outgoing device. A liquidometer is fixed in the manner that a steel wire rope passes through a suspension point and penetrates through the sealing top cover, and the liquidometer is connected with a steel wire rope concentrator. The lower portion of the airtight water level pipe is sleeved with a perforated pipe with pores, and the airtight water level pipe is covered with non-woven geotechnical cloth. A vacuum meter is communicated with the interior of the airtight water level pipe through a vacuum meter plastic guide pipe. The device is easy to install and measure and capable of carrying out automatic measuring and measuring the actual underground water level in soft soil under the vacuum effect, and basic data can be more reliable.

Description

technical field [0001] The invention belongs to the fields of geotechnical engineering soft soil foundation, vacuum drainage preloading reinforcement, groundwater level measurement and monitoring, etc., and in particular relates to a device for measuring the groundwater level under a sealing membrane in the process of vacuum drainage preloading reinforcement of soft soil foundation. The invention also relates to a setting method of the device for measuring the groundwater level under the sealing membrane in the process of vacuum drainage preloading and strengthening soft soil foundation. Background technique [0002] With the rapid development of my country's social economy and the continuous deepening of reform and opening up, the development of national infrastructure construction is changing with each passing day. The number of buildings such as airports, ports, docks, factories, and highways continues to increase, and natural excellent foundations that can be directly use...

AI Technical Summary

Problems solved by technology

[0007] In view of the technical defects of the existing technology, such as the negative pressure state in the observation hole and the accuracy of the groundwater level measurement under the membrane due to the opening of the cover, affecting the effect of vacuum drainage preloading and reinforcement, and the joint measurement is prone to cumulative errors and other technical defects, there are poor measurement accuracy, easy Due to the disadvantages of disturbance and large cumulative error, the purpose of the present invention is to provide a device for measuring the groundwater level under the vacuum drainage preloaded sealing membrane and its setting method

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