路基体内最大侧向位移的位置

路基体内最大侧向位移位置的准确确定,对于合理布置测斜仪、准确把握路基变形特征具有重要意义。基于非线性有限元方法,对路堤各施工阶段路基体内的最大侧向位移的位置进行了考察,对比分析表明:在各施工阶段路基体内最大侧向位移的位置并不是固定不变的,其随着填筑和固结阶段的不同而发生变化。最大侧向位移的位置一般位于坡趾处竖向断面与坡中竖向断面之间的范围附近,故建议把测斜仪布置在该范围内(为了施工方便,可布置在坡中竖向断面或坡趾竖向断面处)。分析表明,工程中通常采用的利用测斜仪来量测路基深部侧向位移发展情况的技术存在一定的弊端。故需发展更精密的仪器来考察路基侧向位移的基本特性。

Study on the Location of the Maximal Lateral Displacement of Soft Soil Foundation Under Embankment

It is important to define the location of the maximal lateral displacement of soft soil foundation,which affect the disposal of inclinometer pipe and holding the character of deformation exactly or not.Based on nonlinear finite element method,the character of lateral displacement of soft soil foundation with stage construction is analyzed.It is shown that the location of the maximal lateral displacement is changeable at different construction stages,which more likely lies in the vertical surface between the toe and the middle of slope of embankment.In order to get the maximal lateral displacement reasonably,it is suggested that the inclinometer pipes should be placed in the area between the toe and the middle of slope of embankment.It is also shown that the lateral displacement can not be measured conveniently with inclinometer pipe,although which has been used in engineering widely,for there are many shortcomings within this technique.So,the technique and instrument should be improved to measure lateral displacement accurately.