膨胀土边坡失稳特征与多维防治技术研究

膨胀土是在我国分布范围较广的一种由亲水性矿物蒙脱石与伊利石组成的高塑性土,其多裂隙性、强胀缩性和超固结性,往往给边坡工程造成滑坡、溜塌、塌陷等灾害,严重影响交通、房屋和水利工程安全。为此,国内外做过很多的处治方法,耗费了巨大的工程费用,但收效并不理想。为了给膨胀土边坡的治理提供更科学合理的理论依据,根据国内外对膨胀土已有的研究成果进行系统分析与评价,提出了膨胀土边坡不宜采取单一的支挡防护措施,应根据膨胀土的成因与微结构特征进行综合治理,以柔性支挡、刚性支挡和植被防护措施的有机结合方为妥当,既能对膨胀土边坡的灾害治理起到长期、有效的作用,又可取得绿化工程环境的双重效果。

Research on Instable Character of Expansive Soil Slope and Multidimensional Control Technology

Expansive soil is a high plastic soil which is composed of hydrophilic mineral montmorillonite and illite, distributing widely in our country.Its multi-cracks, strong expansion and contraction and consolidation often results in landslide, slide collapse,collapse and other disasters to slope engineering, serious impact on traffic, housing and water projects safe.To this end, a lot of treatment methods have done at home and abroad, a huge cost of the project has spent,but there has not been satisfactory.In order to provide a more scientific and rational theoretical basis to governance of expansive soil slope,a theory is put forwarded according to existing research of expansive soil at home and abroad that the expansive soil slope is inappropriate to adopt a single retaining protective measures, but should take comprehensive governance which combines flexible retaining, rigid bracing and vegetation protection measures according to the causes of expansive soil and micro-structural characteristics.It not only plays a long-term and effective role to disaster management, but also can get the double effect of green engineering environment.