论文部分内容阅读
以广西南宁膨胀土为研究对象,考虑气象因素的影响,进行了现场膨胀力测试。测试场地设置桩和框锚结构,在土体中沿水平方向和垂直方向设置土压力盒,测试浅层土体水平向和竖向膨胀力,膨胀力的测试经历了一个完整的雨季。测试结果表明,土体膨胀力的变化与降雨入渗息息相关,“旱涝急转”的过程会造成土体膨胀力骤然变化,但雨季的持续又会对土体水平向和竖向膨胀力带来不同影响。现场对膨胀土竖向和水平向膨胀力的测试结果可为工程设计的优化提供参考。
With the expansive soil in Nanning, Guangxi as the research object, taking into account the influence of meteorological factors, the field expansive force test was carried out. The test site is equipped with piles and frame anchors. The earth pressure box is set up horizontally and vertically in the soil to test the horizontal and vertical expansion forces of the shallow soil. The expansive force test has undergone a complete rainy season. The test results show that the change of soil bulk expansion force is closely related to rainfall infiltration, and the process of “flood and drought rapid change” will cause the sudden change of soil bulk expansion force. However, the continuation of the rainy season will expand the soil horizontally and vertically Force brings different effects. The test results of on-site expansive force of vertical and horizontal expansive soils can provide reference for engineering design optimization.