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Study on Non-destructive Testing and Digitization Image-display Method Using Fast Neutron for Cavity Defects in Interfaces between Steel Plate and Pour Concrete

Author: YiRuiJi
Tutor: ChengHeSen
School: Nanjing Hydraulic Research Institute
Course: Water Resources and Hydropower Engineering
Keywords: Steel Lining Concrete Void defects Fast neutron Non-destructive testing Digital imaging
CLC: TU755.7
Type: Master's thesis
Year: 2007
Downloads: 37
Quote: 0
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Abstract


The steel lining concrete structure commonly used such as water conservancy and hydropower project . Construction quality is not good of Tongjiao Note Void defects between steel plates and concrete , serious threat to the safety of operation of the project . A long time, people have been used x- ray , γ- ray and ultrasonic method for exploration try , but have not worked . Engineering hammer blow method checks only original , often incorrectly, causing the unnecessary destruction of the steel structure . In view of this , this paper proposes the use of a fast neutron scattering method is non-destructive detection of void defects , to solve engineering problems , do the following work : a) the mechanism through two different media, the role of fast neutrons with steel plates and concrete understand the fast neutron slow the difference of the complex interface layer ; b ) to a large number of indoor simulated calibration test is determined on the basis of a combination of surface void defect spatial form with the formation of the thermal neutron concentration (count rate) size and distribution between relations ; c ) defects divided block comparative analysis of the the Void digitized imaging test results ; d ) to the Tianshengqiao a power plant engineering 4 to # volute example , to verify that the combination of steel and pouring concrete surface off the empty defects neutron nondestructive detection and the results of the digital imaging method feasibility in practical applications .

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CLC: > Industrial Technology > Building Science > Construction > The project and the type of work > Concrete and reinforced concrete works > Concrete curing,form removal and defect remedial
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