• 主题
高级搜索  >
历史搜索 清空历史
首页> 中文期刊> 《四川大学学报（工程科学版）》 >青海地区苔藓结皮对土遗址片状剥离的影响

青海地区苔藓结皮对土遗址片状剥离的影响

         
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Scaling off is one of the most common diseases that are found on earthen sites.This disease greatly threats the long-term preservation of earthen structures.Recently,lots of studies were carried out to solve this problem by various methods,however,little positive results was achieved in the aspect of in-situ reinforcement project.Currently,the research topic of slope reinforcement as well as solid and water conservation by moss has been studied by a lot of researchers.In this paper,for the purpose of earthen sites reinforcement,the moss was used to change the condition of earthen structure surface and multiple test methods were carried out to assess the reinforcement effectiveness by this biological method.This paper took the earthen sites of Qinghai area as an example,in situ research,measuring the surface insertion resistance by using micro-penetrometer before and after the growth of moss,and comparatively analyzing the change of surface checking.In the laboratory,the earthen sites were divided into five layers from the outer to the inner.Then the X diffraction instrument was used to analyze the mineral composition in each soil layer;particles of each soil layer were analyzed by laser particle size analyzer;and the ion Chromatography was used to analyze the salt content of each soil layer.The field experiments showed that with the moss growing up,the surface insertion resistance of moss solid crust has a significantly increase than the scaling off crust.Moreover,the crack of scaling off was repaired in this process.Additionally,laboratory experiments showed that:firstly,no significant change existed on the mineral composition and contents in the soil layer of moss and scaling off.Secondly,the particle size of soil tented to be decreasing,however,the content of silt and clay increased.Thirdly,the salt content in the powder layer of moss decreased significantly,salt content of other soil layer was greatly improved.After the growth of moss,the strength and particle structure of the scaling off on the original wall surface were obviously improved,and the salt enrichment had been effectively changed.The whole engineering performance of soil mass was improved after the growth of moss.Therefore,it has a broad prospect for the study of reinforcement of moss to scaling off.%片状剥离是土遗址表面普遍发育的病害,对遗址的长期保存构成了极大的威胁.近年来,大量学者尝试多种手段对片状剥离病害进行整治,但在实际的保护加固工程中效果仍不太理想.目前,利用苔藓加固边坡、保持水土的研究和应用日益丰富.本文从土遗址保护的目的出发,采用在遗址表层培育苔藓的方法,利用生物结皮改善遗址表面片状剥离状态.以青海地区为例,在野外研究中利用微型贯入仪测量苔藓生长前后墙体的表面贯入阻力,并对比分析表面龟裂的变化.室内试验中将土遗址墙面自外向内分成5个土层,利用X衍射仪对各土层进行矿物成分分析;用激光粒度仪对各土层进行颗粒分析,并用离子色谱仪分析各土层的盐分含量.野外试验发现,有苔藓时墙体的表面贯入阻力比无苔藓时明显提高,且原来片状剥离的龟裂也在苔藓生长过程中得以修复.室内试验表明:苔藓生长前后各土层矿物成分及含量均没有发生明显变化;土壤颗粒粒径会趋于减小,粉粒和黏粒含量增多;有苔藓时粉化层中盐分含量明显下降,其他土层盐分含量较无苔藓时有较大提升.苔藓生长后原墙体表面片状剥离的强度和颗粒结构均明显提升,且盐分富集现象得到了较好的改善,土体整体工程性能相对提升.因此,苔藓加固片状剥离有非常广阔的研究前景.

著录项

相似文献

  • 中文文献
  • 外文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号