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通过室内模型试验和现场测试的方法对路基工程中土工格栅与填土界面之间的相互作用特性进行了研究,分析了上覆荷载、层间厚度、压实度、埋设层数、埋设位置等因素对于格栅与土界面作用特性的影响规律。试验结果表明,随着上覆荷载的增大,界面拉应力基本呈线性增长,量值大约为竖向荷载的1/1000;在路堤中心线处的拉应力最大,往两侧逐渐减小;随层厚及压实度的增加,界面摩阻力逐渐增大,格栅界面作用逐渐增强。为保证土工格栅抗变形能力的充分发挥,实际工程中格栅的埋设应遵循“上疏下密”的原则。现场试验也表明,土工格栅有调整荷载分布的作用,对于减小路堤的不均匀沉降有明显的效果,从而对提高路基的稳定性能有较大作用。
The interaction between geogrid and filling interface in subgrade engineering was studied by means of indoor model test and field test. The effects of overlying load, interlayer thickness, compaction, buried layer number, buried location And other factors on the grid and soil interaction characteristics of the law. The test results show that with the increase of overburden, the interface tensile stress increases linearly with the value about 1/1000 of the vertical load. The tensile stress at the embankment center line is the largest and decreases gradually to both sides. With the increase of layer thickness and compaction, the interface friction gradually increases and the effect of the grid interface gradually increases. To ensure the geogrid resistance to deformation of the full play, the actual project of the grille should be buried buried Field tests also show that geogrids have the effect of adjusting the load distribution and have obvious effects on reducing the uneven settlement of embankments, which has a great effect on improving the stability of roadbed.