Foam concrete railroad bed structure and construction method thereof

Abstract

The invention discloses a foam concrete railroad bed structure. The foam concrete railroad bed structure is sequentially provided with a plurality of jet grouting piles or miniature steel pipe piles,a cushion layer, an impermeable layer and a foam concrete layer from bottom to top, wherein the foam concrete layer is of a frame structure formed by pouring foam concrete, or a frame structure formedby filling foam concrete precast blocks and then pouring the foam concrete. The construction method comprises the following steps of (1) prefabricating foam concrete blocks in advance for later use;(2) embedding a plurality of jet grouting piles or miniature steel pipe piles; (3) forming the cushion layer; (4) forming the impermeable layer; and (5) pouring foam concrete on the impermeable layer,or firstly building foam concrete blocks for filling and then pouring the foam concrete to form the foam concrete layer. The foam concrete does not need to be vibrated and compacted during construction, and an original roadbed is not disturbed. The construction process of prefabrication and cast-in-place is adopted, so that the construction time can be greatly shortened, and the comprehensive construction cost of a project is reduced.

Description

technical field [0001] The invention relates to the technical field of railway embankment engineering, in particular to a foam concrete railway embankment structure and a construction method thereof. Background technique [0002] The railway subgrade is a structure that bears and transmits the gravity of the track and the dynamic action of the train. It is the foundation of the track and an important building to ensure the operation of the train. The subgrade is a kind of earth-stone structure, which is in various topographical, geological, hydrological and climatic environments, and sometimes suffers from various disasters, such as floods, mudslides, collapses, earthquakes, etc. [0003] Settlement control is an important factor to be considered in the design and construction of railway embankment, but there are few studies on it at home and abroad. As the scale of railway construction continues to expand, the original railway line can no longer meet the needs of operation...

AI Technical Summary

Problems solved by technology

The traditional treatment method is piling + filling of group AB filler, but the piling has a large disturbance to the original railway sub

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