山区公路膨胀土路基改良原理与施工工艺研究  

Research on Improvement Principles and Construction Technologies of Expansive Soil in Mountainous Road

作　　者：赵宾 李晶哲 钱坤 张汝文 岳锐强[3] 

机构地区：[1]云南省公路开发投资有限责任公司,昆明市650228 [2]云南楚广高速公路建设指挥部,楚雄市675000 [3]云南蒙新高速公路建设指挥部,昆明市650000

出　　处：《公路》2014年第6期325-329,共5页Highway

摘　　要：膨胀土吸水膨胀,失水收缩,表现出明显的膨胀性、多裂隙性与超固结性,给公路路基边坡防护带来极大灾害性。文中采用新型稳固剂进行路基土改良。稳固土改良路基的压实质量控制受稳固土力学性质、压实功能、土的含水量、铺层厚度、土的级配、底层强度和压实度影响,表现出较高的抗拉、抗剪及抑制胀缩变形等特性,对于提高公路路堤、路堑的边坡稳定性和减少投资成本均具有重要意义。Expansive soil shows the obvious characteristics of swelling, multiple fractures and over consolidation. It will swell after water absorption and shrink when water shrinkage, which will trigger great severe problem for highway subgrade slope protection. In this paper, a new solid modifier is used in soil improvement of subgrade. The modification effects of subgrade are controlled by mechanics properties, compaction function, water content, layer thickness, the gradation, the underlying strength and the compaction effect of soil. The modified soil shows the characteristics of higher tensile, shear and swell-shrink deformation resistance properties. It has important significance for the slope stability of highway embankment and cost .

关 键 词：膨胀土 稳固剂 施工工艺 

分 类 号：U416.1[交通运输工程—道路与铁道工程]