水力发电学报2024，Vol.43Issue(1)：143-152,10.DOI:10.11660/slfdxb.20240113
输水工程中淡水壳菜侵蚀混凝土的机理研究
Study on erosion mechanism of Limnoperna fortunei on concrete in water transmission engineering
摘要
Abstract
The adhesion of Limnoperna fortunei to the inner concrete walls of a water transmission building causes the deterioration of concrete performance.Its adhesion law and erosion mechanism is of great value for the prevention and control of it.This study examines the behaviors of L.fortunei inside a water transmission building,focusing on its adhesion law,foot invasion mechanism,and spatial differences in length,and analyzes its influence on the physical properties of concrete through hardness tests and erosion depth tests on concrete in-situ.We reveal the micro mechanism of concrete erosion by L.fortunei based on a comparison of the micro morphologies,chemical element changes,and XRD diffraction patterns of the concrete before and after erosion;A phase transformation mechanism of the eroded concrete is suggested.The results show the attachment density of L.fortunei exhibits a decay trend from the inlet to outlet inside an aqueduct.Its attachment density inside an inverted siphon fluctuates along the way,but is generally stable;A positive correlation is observed between its vertical separation force and body length,and the latter features long in the south and short in the north in a large scale space,with a difference of 10mm.Under its long-term adhesion,a concrete surface suffers a decrease in material hardness and an increase in erosion depth;the micro morphology is loose and porous.Erosion causes a loss of Ca and Fe elements and creates silica,a major product of concrete.关键词
淡水壳菜/附着规律/侵蚀深度/元素变化/物相变化Key words
Limnoperna fortunei/adhesion law/erosion depth/element change/phase change分类
建筑与水利引用本文复制引用
张社荣,闫军涛,马梓奡,张吉康,王超,王枭华..输水工程中淡水壳菜侵蚀混凝土的机理研究[J].水力发电学报,2024,43(1):143-152,10.基金项目
天津市自然科学基金面上项目(21JCYBJC00410) （21JCYBJC00410）
