Inductance type sediment thickness measurement instrument and measuring method

Abstract

The invention discloses an inductance type sediment thickness measurement instrument and a measuring method. The inductance type sediment thickness measurement instrument mainly comprises a conducting material ring, a detection column and an inductance detection display device. An inductance coil set formed by connecting multiple inductance coils in series is arranged in the detection column, the inductance coils are vertically arranged from sparse to dense or from dense to sparse, the detection column penetrates through the conducting material ring and can slide in the vertical direction in a reciprocating mode, and therefore a probe fixed to the detection column can be driven to be inserted into the lower bottom face of a sediment layer for sediment thickness measurement. The measuring method of the measuring instrument carries out position detection based on the electromagnetic induction principle between the conducting material ring and the inductance coil set, interference from external influences is not likely to be caused, detection stability and reliability are good, high measuring precision is achieved, measuring operation is convenient, the measuring result can be visually displayed through the inductance detection display device, high practicality is achieved, and the defect of an existing sediment thickness measurement technology is well overcome.

Description

technical field [0001] The invention relates to the technical field of sediment thickness measurement of bored piles in engineering construction, in particular to an inductive sediment thickness measuring instrument and a measuring method. Background technique [0002] The thickness of the sediment at the bottom of the cast-in-place pile will affect the construction quality of the cast-in-place pile. The current relevant national standards and specifications have clear and strict regulations on the thickness of sediment. For example, taking the "Technical Specifications for Building Pile Foundations" (JGJ94-2008) as an example, the sediment thickness index at the bottom of the pile pile with mud retaining wall forming holes should meet: 1) End-bearing piles should not be larger than 50mm; 2) friction piles should not be larger than 100mm; 3) pullout-resistant and low-horizontal piles should not be larger than 200mm. [0003] At present, the measurement of the sediment thick...

AI Technical Summary

Problems solved by technology

The existing method is greatly affected by human factors, the operation is cumbersome, the measurement error is large, and the practicability is not strong

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