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High-precision dam foundation grouting stratum lifting detection device

A detection device, high-precision technology, applied in infrastructure engineering, infrastructure testing, construction, etc., can solve the problem of high failure rate of lifting detection, achieve improved stability and continuity, high resolution, and easy to use Effect

Active Publication Date: 2020-04-24
CENT SOUTH UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual grouting construction, the failure rate of lift detection caused by these external factors is high, making the lift detection useless

Method used

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  • High-precision dam foundation grouting stratum lifting detection device
  • High-precision dam foundation grouting stratum lifting detection device
  • High-precision dam foundation grouting stratum lifting detection device

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Embodiment Construction

[0025] 1) solenoid differential micro-displacement sensor

[0026] The high-precision formation lift detection device is designed with two upper and lower solenoid differential micro-displacement sensors. image 3The middle, upper and lower cylindrical coil bodies are respectively the upper cylindrical coil body 1 and the lower cylindrical coil body 9. The armature one 2 and the armature two 10 are respectively placed in the upper and lower two cylindrical coil bodies, and their structure and composition are complete. same. The sensor is designed using the weak magnetic coupling mechanism of the open magnetic circuit, and the winding and packaging of the cylindrical coil body are entrusted to professional manufacturers for winding and manufacturing. The winding principle of the primary and secondary coils of the solenoid coil type differential transformer is shown in figure 1 , see the structure figure 2 . The outer diameter of the coil is φ18mm, the length is 150mm, and ...

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Abstract

The invention discloses a high-precision dam foundation grouting stratum lifting detection device. The high-precision dam foundation grouting stratum lifting detection device is composed of two solenoid differential micro-displacement sensors, a double-detection shockproof safety base and a stratum lifting detection display and alarm system. In the device, each solenoid differential micro-displacement sensor is decomposed into two independent parts, namely a cylindrical coil main body and an armature, the upper solenoid differential displacement sensor is used for measuring the lifting displacement of stratum during grouting, and the lower solenoid differential displacement sensor is used for measuring the disturbance displacement of an upper metal positioning plate caused by environmentalfactors. The double-detection shockproof safety base is fixed to the cement ground through expansion screws; and a lifting recorder finishes processing, displaying and alarming of lifting displacement and disturbance displacement signals and the lifting recorder comprises a high-amplitude-stabilization excitation source, a phase-sensitive detector and a V / A conversion circuit, wherein the phase-sensitive detector is used for processing output signals of a sensor. The device can adapt to the severe environment of grouting engineering, is firm and durable, improves the stability and continuityof detection, remarkably reduces the failure rate of lifting detection, and is very high in resolution.

Description

technical field [0001] The invention belongs to the fields of water conservancy and hydropower engineering and foundation and foundation treatment engineering, in particular to a high-precision detection device specially designed for detecting the micro-displacement (lifting) of the irrigated stratum in grouting engineering. Background technique [0002] In grouting engineering, the lifting displacement of the irrigated stratum is an important parameter that must be detected in various specifications, and it is required that the cumulative displacement of each grouting section should not exceed 2000 μm. At present, mechanical dial indicators, electronic dial indicators with grating or capacitive grid structure are mostly used on the grouting site. Mechanical dial gauges are difficult to read and almost all are intermittent readings. Due to their grid structure, grating capacitive electronic dial gauges are easily damaged at the grouting site and are not suitable for use on g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 徐蒙张浩翔徐聪云杨建勇孙家波马海忠王道明徐力生
Owner CENT SOUTH UNIV
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