文章摘要
许强,亓星,修德皓,赵宽耀.突发型黄土滑坡的临界水位研究——以甘肃黑方台黄土滑坡为例[J].水利学报,2019,50(3):315-322
突发型黄土滑坡的临界水位研究——以甘肃黑方台黄土滑坡为例
Critical water level of abrupt loess landslides:a case study in Heifangtai,Gansu Province
投稿时间:2019-02-03  
DOI:10.13243/j.cnki.slxb.20190013
中文关键词: 黑方台  突发型黄土滑坡  地下水位  三轴试验  水位判识
英文关键词: Heifangtai  sudden loess landslide  ground water table  triaxial test  water level recognition
基金项目:国家自然科学基金重点项目(41630640);国家创新研究群体科学基金项目(41521002)
作者单位E-mail
许强 成都理工大学 地质灾害防治与地质环境保护国家重点实验室, 四川 成都 610059  
亓星 四川轻化工大学 土木工程学院, 四川 自贡 643000 qixing2009@163.com 
修德皓 成都理工大学 地质灾害防治与地质环境保护国家重点实验室, 四川 成都 610059  
赵宽耀 成都理工大学 地质灾害防治与地质环境保护国家重点实验室, 四川 成都 610059  
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中文摘要:
      甘肃省黑方台黄土滑坡的现场调查表明,地下水位的上升会导致突发型黄土滑坡发生;典型滑坡水位和变形的同步监测,证实地下水位上升到一定限度后会引起滑坡的变形破坏。为进一步揭示水位对土体破坏的影响,采用三轴常偏应力排水剪试验研究了孔隙水压力逐级增加过程中土体的破坏过程。结果表明,孔隙水压力达到轴向应力26%时会引起土体变形的突然增长并破坏,对应了黑方台地下水位占黄土厚度比例为0.4时会引起坡体失稳,并通过现场调查滑坡水位和黄土厚度验证了试验结果。结合试验和调查,以水位比例建立了这类滑坡的判识方法。
英文摘要:
      The field investigation of Heifangtai loess landslides in Gansu Province shows that the rise of groundwater level may lead to abrupt loess landslides.Based on the synchronous monitoring of water level and deformation of typical landslide,it is confirmed that when the groundwater level rises to a certain ex-tent,it will cause deformation and failure of landslides.In order to further reveal the influence of water lev-el on soil failure,the failure process of soil in the process of gradual increase of pore water pressure is studied by triaxial normal deviatoric stress drainage shear test.The results show that the pore water pres-sure can cause the sudden increase and destruction of the soil deformation when the axial stress is 26%,which is verified by the field investigation of the landslide water level and the thickness of the Loess by the ground water level of Heifangtai which accounts for the thickness ratio of 0.4 of the loess.Combined with the test and investigation,the identification method of such landslide is established based on the wa-ter level ratio.
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