| 季冻区土质路堑边坡浅层含水率变化研究 |
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| 引用本文： | 单炜,刘红军,杨林,郭颖,孙玉英.季冻区土质路堑边坡浅层含水率变化研究[J].岩土力学,2008,29(Z1):335-340. |
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| 作者姓名： | 单炜 刘红军 杨林 郭颖 孙玉英 |
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| 作者单位： | 东北林业大学,哈尔滨,150040 |
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| 基金项目： | 黑龙江省科技攻关项目，黑龙江省交通厅资助项目 |
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| 摘 要： | 采用现场实测和室内试验相结合的方法,研究季节性气温变化、边坡深度、坡面植物种类和坡面朝向等因素对边坡土体含水率变化的影响规律.结果证明:边坡土体冻结过程中,水分向冻结区迁移;随着冻结深度增加,含水率的变化也会向深处发展;坡面木本植物比草本植物有更明显的吸水作用;边坡含水率和土体温度的变化影响土体的强度,边坡土体温度在0℃以上时,土体强度主要受含水率变化的影响,当土体温度在0℃以下时,强度主要受温度变化的影响;三轴试验证明:边坡土体的黏聚力首先随着含水率的增加而增大,含水率达到15 %以后,边坡土体的黏聚力随含水率的增大而减小;边坡土体的内摩擦角基本上是随着含水率的增大而减小.研究成果可为季节性冻土地区高等级公路路堑边坡冻融失稳的预警提供判据.
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| 关 键 词： | 季节性冻土地区 土质路堑边坡 含水率 冻土失稳 植物护坡 |
| 收稿时间： | 2008-07-25 |
Study of regularity of variation of water content in shallow layer of soil road cutting slopes in seasonally frozen-ground region |
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| SHAN Wei,LIU Hong-jun,YANG Lin,GUO Ying,SUN Yu-ying.Study of regularity of variation of water content in shallow layer of soil road cutting slopes in seasonally frozen-ground region[J].Rock and Soil Mechanics,2008,29(Z1):335-340. |
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| Authors: | SHAN Wei LIU Hong-jun YANG Lin GUO Ying SUN Yu-ying |
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| Institution: | Northeast Forestry University, Harbin 150040, China |
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| Abstract: | By way of combined field tests and lab tests,it was studied that the change of moisture of the soil body of the slopes with seasonal temperature,height of slope,varieties of plants on the slope surface,and specific locations of the slope,etc.It is shown that: during freezing of the soil body of the slopes,moisture moves towards the frozen zone;with deeper depth of freezing,change of water content tends to take place at deeper depth too;the herbaceous plants has better moisture absorption function than the g... |
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| Keywords: | seasonally frozen-ground region soil road cutting slope water content freeze-thaw destabilization slope protected by plants |
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