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田巍巍.干湿循环下不同风化程度泥质粉砂岩崩解特性试验研究水资源与水工程学报[J].,2018,29(6):223-226
干湿循环下不同风化程度泥质粉砂岩崩解特性试验研究
Experimental study on disintegration characteristics of argillaceous siltstone with different degree of weathering under dry-wet cycling
  
DOI:10.11705/j.issn.1672-643X.2018.06.34
中文关键词:  风化作用  崩解特性  干湿循环  泥质粉砂岩
英文关键词:weathering  disintegration characteristics  dry-wet cycling  argillaceous silt stone
基金项目:
作者单位
田巍巍 (新疆水利水电勘测设计研究院 新疆 乌鲁木齐 830091) 
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中文摘要:
      为了研究干湿气候环境的变化对泥质粉砂岩崩解特性的影响,以新疆肯斯瓦特水利枢纽工程泥质粉砂岩为研究对象,通过室内模拟干湿淋水状态变化,对风化作用下的泥质粉砂岩进行崩解性和力学特性试验研究,结果发现:随着风化程度的加剧,泥质粉砂岩耐崩解性逐步减弱;循环崩解后,各粒径含量都呈现增加趋势,强风化的崩解速度和崩解含量高于风化程度低的岩石;风化作用促使泥质粉砂岩原生结构发生了改变,泥质物含量增加,使其强度和抵抗变形的能力降低。从崩解的微观机制上分析,黏土矿物含量、胶结物类型等对崩解的发生起了主导作用;风化作用促进了黏土矿物含量的增加,加速了崩解,不同风化类型导致崩解特性也出现差异性。
英文摘要:
      In order to study the effects of dry and wet climate changes on the disintegration characteristics of argillaceous siltstones, the argillaceous siltstones of the Kinswat Water Conservancy Project in Xinjiang were studied. We conducted the experimental study on the indoor disintegration and mechanical properties of argillaceous siltstones with different degrees of weathering by indoor simulation of dry and wet watering change conditions. The results showed that as the degree of weathering intensifies, the resistance to collapse of argillaceous siltstone gradually weakened. After the cycle disintegration, the particle size content increased. The disintegration rate and disintegration amount of strong weathering were higher than that of the rock with low weathering degree. The weathering action promoted the change of the original structure of argillaceous siltstone and the increase of muddy matter content. It reduces the strength and ability to resist deformation. From the microscopic mechanism of disintegration, the content of clay minerals and the type of cement played a leading role in the occurrence of disintegration. Weathering promotes the increase of clay mineral content and accelerates disintegration. Different weathering types lead to differences in disintegration characteristics.
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