利用红层泥岩填筑高速铁路路基技术的试验研究

Experimental Study on the Technology for Filling the Subgrade of High-speed Railway with Red Rock

研究目的:我国西南、西北、中南及东南等地区广泛分布红层泥岩,开展红层泥岩填筑高速铁路路基技术的研究,提出系统的红层泥岩填料使用方法与工程技术,对我国铁路建设具有重要意义。研究结论:通过室内土工试验、现场路基填筑试验、路基离心模型试验与现场原型路基沉降观测、现场原型路基循环加载试验等方法,系统研究了红层泥岩土填料工程特性、红层泥岩路基压密沉降、累积变形特性等关键技术问题。在此基础上提出了利用红层泥岩填筑高速铁路路基工程技术,主要包括红层泥岩填料制备标准、红层泥岩路基填筑压实标准、红层泥岩路基结构及设计参数、红层泥岩填筑施工工艺及要点等内容。工程实践表明,所提出的红层泥岩填筑高速铁路路基技术是合理、可行的。

Research purposes： Red rock is widely spread in southwest, northwest, central south and southwest of China, so doing the study on the technology for filling the subgrade of high - speed with red rock and proposing the systematical applicable method and engineering technology for the red rock as filling material are essential to the railway construction in China. Research conclusions： The systematical studies are done on the engineering characteristics of red rock as filling material, the compactness and subsidence of red rock subgrade and the characteristics of accumulated deformation through indoor soil mechanics test, on - site subgrade filling test, subgrade centrifugal model test, on - site prototype subgrade subsidence observation and on - site prototype subgrade cycle loading test. Based on the study, the engineering technology for filling the subgrade of high - speed railway with red rock is proposed, including the manufacture standard of red rock filling material, the compactness standard of red rock subgrade, the structure and design parameters of red rock subgrade, construction technique and construction key points. The engineering practice shows the technology presented in this paper for filling the subgrade of high - speed railway with red rock is reasonable and feasible.