测斜管对土质边坡变形和稳定性的影响分析

该文结合某土质边坡监测试验所用PVC材质测斜管,测求了该管的基本力学参数,利用有限元法的分析手段,分析和评价了有无测斜管以及不同抗弯刚度的测斜管对土质边坡变形和稳定性的影响程度。认为:PVC材质测斜管对土质边坡的稳定性和变形影响较小;影响测斜管的水平位移的关键参数是抗弯刚度EI,抗弯刚度越大,其水平变位就越小;影响测斜管的竖向变形的关键参数是弹性模量E,即E越大,其竖向变形就越小;PVC材质测斜管对土体变形的影响范围仅为3D(D为测斜管外径),且测斜管的抗弯刚度远小于对边坡变形产生影响的抗弯刚度。故在边坡变形和稳定性的分析中可以不予考虑测斜管的影响。

Analysis of Influence of Inclinometer Tube on Deformation and Stability of Soil Slope

Combined with PVC inclinometer tube used for a soil slope monitor test, the article measures the basic mechanical parameter of this tube, analyzes and evaluates the influence extent of the inclinometer tube being or not and with the different bending rigidity on the deformation and stability of soil slope. The article considers that the influence of PVC inclinometer tube is smaller on the stability and deformation of soil slope, the key parameter influencing the horizontal displacement of inclinometer tube is the bending rigidity EI, the more bending rigidity is large, the more its horizontal displacement is smaller, the key parameter influencing the vertical deformation of inclinometer tube is the elastic modulus E, that is, the larger E is, the smaller its vertical deformation is, the influence range of PVC inclinometer tube on the soil deformation is only 3D (D is the outer diameter of inclinometer tube), and the bending rigidity of inclinometer is very smaller than the bending rigidity influenced by the deformation of slope. Therefore, the article can not consider the influence of inclinometer tube in the analysis of deformation and stability of slope.