土工基础

›› 2016, Vol. 30 ›› Issue (2): 259-264.

• 工程实录 • 上一篇    下一篇

非饱和红粘土边坡湿热特性现场测试研究

郭敬林 1，韦昌富 2,3，颜荣涛 2,3，黄振育 4,卢有谦 2   

  1. （1.江西科技学院，南昌 330098；2.桂林理工大学 土木与建筑工程学院，广西桂林 541004；
    3.广西岩土力学与工程重点实验室，广西桂林 541004;4.桂林理工大学 管理学院，广西桂林 541004）
  • 收稿日期:2015-03-13 出版日期:2016-04-20 发布日期:2016-04-27
  • 作者简介:郭敬林（1988-），男，硕士研究生，研究方向为非饱和土力学和环境岩土工程。
  • 基金资助:

    广西自然科学基金创新团队项目（编号2012GXNSFGA060001）；江西科技学院校级自然科学研究项目（编号ZR14YB01）

In-situ Moisture Content and Temperature Relationship Study in an Unsaturated Red Clay Slope

GUO Jinglin 1, WEI Changfu 2,3, YAN Rongtao 2,3, HUANG Zhenyu 4， LU Youqian 2   

  1. (1.Jiangxi University of Technology, Nanchang 330098; 
    2.College of Civil Engineering and Architectural, Guilin University of Technology, Guilin 541004；
    3.Guangxi Key Laboratory for Geomechanics and Geotechnical Engineering, Guilin 541004;
    4.College of Management, Guilin University of Technology, Guilin 541004)
  • Received:2015-03-13 Online:2016-04-20 Published:2016-04-27

摘要： 关于非饱和土湿热耦合传输作用的理论模型很多，大部分是基于特定的假设和边界条件提出的，而这些模型很少有应用过红粘土边坡现场测试的数据进行适用性验证。在广西桂林雁山地区建立非饱和红粘土边坡的现场原位测试系统，既实时跟踪测试红粘土边坡土体含水量和温度的演化规律，又获得炎热多雨环境下红粘土边坡的现场气象条件、土体含水量和温度的第一手资料，为研究者们进行相关模型的验证提供现场参考资料。红粘土边坡现场测试结果表明：土体含水量和温度随大气变化而呈正弦波动变化，表层土体含水量和温度随气候的波动最剧烈；当受大气降雨影响时，大气温度降低，土体含水量增加，温度降低，反之，则土体含水量减小，温度增加；土体含水量和温度之间的变化具有很强的关联性，含水量的增加降低了大气温度的影响范围和土体温度的变化幅度，而温度的变化反映出土体水分的迁移特性；随深度的增加，大气对土体含水量和温度的影响减弱。

关键词: 非饱和红粘土, 现场测试, 含水量, 温度

Abstract: There are several theoretical models existed for describing the relationship between the moisture migration and the temperature in the unsaturated soils. However, most of them are developed based on specific assumptions and boundary conditions and none of them are verified with the data collected from the in-situ conditions in unsaturated red clay soil slopes. An insitu moisture migrationtemperature monitoring system was established at a red slope in Linyanshan, Guilin City.  This monitoring system not only real time monitored the moisture content and temperature change in the red clay slope, it also collected the site weather conditions, moisture content as well as the temperature in the unsaturated soils under the tropical and humid conditions. The monitoring results indicate that, the moisture content and the temperature in the red clay slope changes with ambient weather conditions. The moisture content and temperature in the shallow depth vary significantly with the ambient weather. Under the precipitation conditions, the ambient temperature decreases, the moisture content in soil increases and temperature decreases and vice versa. The moisture content in soil has connected with the temperature in the soil. The increase of the moisture content reduces the influence depth of the ambient temperature and the range of the soil temperature change. With the increase of the depth, the ambient temperature has less influence on the moisture content and temperature variations.

Key words: Unsaturated Red Clay, In-Situ Tests, Moisture Contents, Temperature