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改良路堤填料是高速铁路路基的重要内容.研究内容是通过在Q4黄土中掺入水泥及石灰进行土质改良.通过大量的室内试验,进行了水泥改良土、石灰改良土的物理力学特性研究,得到了有价值的结论:对于石灰改良土,存在一最佳石灰掺量,约7%,石灰土在最佳掺灰量时,其强度存在一峰值.水泥改良土在不同掺和比条件下的物理力学性质指标均能够满足路堤填料的要求.出于安全及经济因素,认为路堤填料采用Q4黄土掺入5%水泥改良土为宜.含水量对改良土的工程性质影响很大,因而在工程施工中应使改良填料的含水量尽可能达到最优含水量.
The improved embankment filler is an important part of the high-speed railway subgrade.The content of the study is to improve the soil quality by adding cement and lime into the Q4 loess.Through a large number of laboratory tests, the physical and mechanical properties of the cement- Valuable conclusion: For the lime-modified soil, there is a best lime content, about 7%, and the limestone has a peak in the intensity of the best ash addition. For the safety and economic reasons, it is considered that the embankment filler should be doped with Q4 loess into 5% cement-modified soil, and the water content has a great influence on the engineering properties of the modified soil. Therefore, Construction should make the water content of the modified filler as far as possible to achieve the optimal moisture content.