Pressure box-type high-speed railway bed structure and construction method

Abstract

The invention discloses a pressure box-type high-speed railway bed structure and a construction method so as to effectively reduce the cost of building high-speed railway beds in flat areas and reducethe land occupied by railway beds to the maximum. Reinforced concrete box body segments are continuously arranged on a foundation in the line direction, and expansion joints are arranged between theend faces of the adjacent reinforced concrete box body segments; each reinforced concrete box body segment is formed by a bottom plate, a left vertical arm wall, a right vertical arm wall, a top plateand the two longitudinal end plates which are fixedly connected into a whole and form a closed box section, wherein the top plate is the foundation of a track system. A flexible airbag is placed in the inner cavity of each reinforced concrete box body segment, or a sealing structure is arranged to form a closed cavity; an air inlet pipe communicated with the corresponding flexible airbag or the corresponding closed cavity is fixedly arranged on each left vertical arm wall or each right vertical arm wall.

Description

technical field [0001] The invention relates to geotechnical engineering, in particular to a pressure-type box-type high-speed railway subgrade structure and a construction method, which are used for high-speed railway subgrade construction projects in plain areas lacking high-quality fillers. Background technique [0002] Railway subgrades are usually filled with fillers of certain specifications. The top surface of the embankment is the foundation of the track system. Drainage ditches are set outside the slopes on both sides of the embankment. The subgrade covers a large area. Fillers have very strict requirements. However, plain areas usually lack high-quality fillers, and farmland is precious. In the construction of high-speed railways in plain areas, if bridges are used to replace traditional roadbeds, the investment will be huge; if roadbeds are built, they will face the problems of lack of high-quality fillers, wide land use, and difficult drainage. Reinforcement me...

AI Technical Summary

Problems solved by technology

However, plain areas usually lack high-quality fillers, and farmland is precious

In the construction of high-speed railways in plain areas, if bridges are used to replace traditional roadbeds, the investment will be huge; if roadbeds are built, they will face the problems of lack of high-quality fillers, wide land use, and difficult drainage. Reinforcement measures are taken for the soil foundation, so the cost of roadbed construction is also high

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