某特大桥超大群桩基础模型试验材料选择

SELECT THE MATERIALS IN MODEL TEST FOR THE LARGE-SCALE PILE GROUP FOUNDATION OF A LARGE-SPAN BRIDGE

在桩体室内模型试验中,模型桩体和原型桩体的轴力及弯矩的分布图一致,是由测量模型材料的应变量的精度确定,为了得到较大的应变量,对模型材料的选择至关重要。对《李子沟特大桥超大群桩基础试验研究》文中的桩体选择几种模型材料,通过计算选择材料的应变量,理想的材料为与原材料的弹性模量和重度相同的材料,其次是弹性模量与重度和原桩身材料相近的材料。可为其他同类模型试验选择材料作参考。

For indoor model test of pile,whither the normal force and bending moment of model pile is consistent with the normal force and bending moment of the prototype pile＇ s graph or not is determined by measuring the accuracy of the stain of the model material. In order to get large stains,selecting model material is critically. The text select several materials for the researched on large-scale pile group foundation Lizigou large span bridge. Based on calculating the stains of selection materials, the most suitable material is the parameters are identical with the original pile, the next material is it＇ s modulus of elasticity and density are similar to the original pile material, and it can be served as the reference to other similar model test in material selection.