Method for widening shoulder of existing railway subgrade

Abstract

A method for widening a shoulder of an existing railway subgrade comprises the steps: A, digging on a shoulder of a railway subgrade and a subgrade slope outside the shoulder, transverse troughs at equal intervals longitudinally along a line, the transverse troughs being used for receiving transverse ribs of unitary T-shaped members, inner ends of the transverse troughs being positioned at a junction of the shoulder and a bed, and the length of the transverse ribs being equal to the width of a widened new shoulder; B, cutting the subgrade slope longitudinally along the line to form a slope platform for placing vertical panels of the unitary T-shaped members; C, placing the transverse ribs of the unitary T-shaped members in the transverse troughs, with the vertical panels placed on the sloe platform; D, on the inner side of the vertical panels and two sides of the transverse ribs, backfilling soil layer by layer and compacting until the soil is flush with the shoulder to form the widened new shoulder. In widening the shoulder by the method, subgrade soil is highly stable, low disturbances are caused to the soil, masonry quantity is low, construction period is short, and the cost is low.

Description

technical field [0001] The invention relates to a road shoulder widening method for existing railway roadbeds, belonging to the technical field of roadbed engineering. Background technique [0002] In recent years, due to the increase of railway speed and traffic volume, the technical requirements of some existing railways in our country can no longer meet the needs of development, resulting in common railway subgrade settlement, muddying and a series of subgrade diseases caused by it, which not only increases the railway The workload of the maintenance department seriously affects the efficiency of railway transportation and operational safety, so it is necessary to take reasonable and effective rectification measures to deal with it. Among them, shoulder widening measures are widely used: ① Existing railway roadbed has uneven settlement, and the elevation of the top surface of the roadbed is inconsistent with the design value. increase, the existing road shoulder width is...

AI Technical Summary

Problems solved by technology

However, it needs to be excavated integrally in the slope soil to form the foundation pit of the retaining wall, and the excavation volume is large; and the integral cast-in-place construction of a large-area gravity retaining wall higher than the road shoulder requires a large amount of masonry. Long construction period and high construction cost

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