High-speed railway powder soil and sandy silt embankment structure and construction method

Abstract

The invention discloses a high-speed railway powder soil and sandy silt embankment structure and a construction method to effectively solve the problems of difficulty in filling and compacting powder soil and sandy silt and poor stability, so that the powder soil and the sandy silt can serve as a high-speed railway embankment bottom structure, and engineering investment is greatly saved. The embankment structure is characterized in that a trench structure body longitudinally extending along a line is arranged above a geotechnical foundation, and the bottoms of two sides of the trench structure body are provided with longitudinally spaced drain holes. The inner bottom of the trench structure body is filled with a broken stone hardcore, a composite drain board is laid at the top of the broken stone hardcore, the upper portion of the composite drain board is filled with powder soil and sandy silt filling, a composite geo-membrane is laid at the top of the powder soil and sandy silt filling, a medium-coarse sand cushion is laid at the top of the composite geo-membrane, and the upper portion of the medium-coarse sand cushion is filled with an embankment surface layer structure. Stress tie bars are arranged in the powder soil and sandy silt filling in a longitudinally spaced and vertically layered manner, and two ends of each stress tie bar are fixedly connected with the side wall of the trench structure body.

Description

Technical field [0001] The invention relates to a high-speed railway, in particular to a project for filling high-speed railway embankments with silt and silt sand. Background technique [0002] High-speed railway has many advantages, and its development at home and abroad is very rapid. Because high-speed railways have very high requirements for line smoothness and comfort, when constructing high-speed railway embankments, there are clear requirements on the properties and compaction standards of the filling materials, and it is usually required to use coarse-grained soil and improved soil filling for embankment Engineering filling, and clearly stipulates that silt, silt, and fine silt sand shall not be used for embankment filling. Even if it is an embankment project, the main reason is that it is difficult to fill and compact the silt, silt and fine sand. Poor stability and large deformation. However, with the continuous expansion of high-speed railway construction areas, the...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-speed railway silt and silt embankment structure to effectively solve the difficult problems of silt and silt filling compaction and poor stability, so that silt and silt can be used as high-speed The underlying structure of the railway embankment greatly saves engineering investment

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