气泡混合轻质土承载特性模型试验研究

Experimental Study on the Load-Bearing Characteristics of Light Foam Concrete

摘要: 为了探究气泡混合轻质土在路基中的适用性研究，得到气泡混合轻质土作为路堤填料时的破坏模式及受力状况。制作了不同高度的气泡混合轻质土试件，将其作为路基填料部分，在模拟行车荷载作用下，研究其承载性能和下部砂质路基的受力以及变形情况。试验结果表明：不同高度的气泡混合轻质土试件所能承受的荷载并不一样，随着轻质土试件高度的增加，承受荷载越大，然而试件底部的容许拉应力变化不大。经过破坏荷载影响因素灵敏度分析后，试件宽度的增加也可以使试件的破坏荷载增大。不过试件高度对其影响最大。

Abstract: To explore the applicability of the light foam concrete in the subgrade, the destruction of light foam concrete as embankment filling pattern and stress state is studied. This paper uses the in-door model test research, and simulation of light foam concrete roadbed filler; under the condi-tion of load and the rigid support, different filling thickness changing of light foam concrete roadbed and the lower part of soil sandy roadbed internal force and deformation are studied. The test results show that the failure loads of the samples with different heights of light foam concrete are different; and the higher the height, the greater the failure loads, but the allowable tensile stress at the bottom of the samples is basically the same. With the increase of the width of the light foam concrete specimen, the compressive stress zone at the bottom of the specimen increases and the specimen can bear more loads. The height of the light foam concrete specimen has the greatest influence on the load.