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在路堤或地基的分层填筑过程中,按规定的厚度(约30cm)铺设一层塑料网格加筋材,经分层压实或夯实后,使土与网格结合在一起,形成复合材料从而提高其力学性能及抗震能力。由于网格具有一定的抗拉能力,使施工机械能沿路肩进行碾压作业,从而达到路堤均匀压实。这样可减少或避免路堤超填,节约土方和人力,经济效果显著,并可防止坡面的坍塌和冲沟的扩大。是今后地基、路基和土质边坡处理的一项新途径。 为了搞清这种加筋土复合材料的力学性和破坏机理,对这种复合材料进行了46组剪切试验、10次挡土墙后加筋土的模型试验和4组15次模拟地震的抗震性能试验。试验结果表明,在土质及试验方法完全相同的情况下,这种复合材料的抗剪强度较不加筋时有明显的提高,抗震性能有显著的增强。这种新型的地基加固材料,已引起工程界人士的重视,并已在铁路路基工程中得到应用。
Lay in the embankment or subgrade filling process, according to the provisions of the thickness (about 30cm) laying a plastic grid reinforcement material, layered by compaction or compaction, the soil and the grid together to form a complex Material to improve its mechanical properties and seismic capacity. As the grid has a certain tensile strength, so that the construction machinery along the road shoulder rolling operations, so as to achieve uniform embankment compaction. This can reduce or avoid the overloading of embankments, save earthwork and manpower, and have significant economic effects and prevent the slope collapse and gully expansion. It will be a new way to handle foundation, subgrade and soil slope in the future. In order to find out the mechanics and failure mechanism of this kind of reinforced soil composite, 46 sets of shear tests, 10 model tests of reinforced earth behind the retaining wall and four sets of 15 simulated earthquakes Seismic performance test. The test results show that the shear strength of the composites is obviously improved when the soil and test method are the same, and the seismic performance is obviously enhanced. This new type of foundation reinforcement has drawn the attention of the engineering community and has been applied in railway subgrade projects.