Replacement and repairing structure of sedimentation of railway station platform in soft soil area and construction method

Abstract

The invention discloses a replacement and repairing structure of sedimentation of a railway station platform in a soft soil area and a construction method. The structure comprises multiple layers of light soil, wherein the light soil is arranged on an area needed to be repaired in the railway station platform. A galvanized wire mesh anti-crack layer is arranged between every two layers of light soil, a medium-coarse-sand mix-pavement HDPE waterproof geomembrane is arranged on the top layer of the light soil, and a platform-surface pavement layer is arranged at the top of the medium-coarse-sand mix-pavement HDPE waterproof geomembrane. According to the replacement and repairing structure of sedimentation of the railway station platform in the soft soil area and the construction method, the filled soil of an original platform is replaced with foam light soil. Because the volume weight of the light soil is 6-10 kN / m3 (the volume weight of some light soil is lower, for example, the volume weight of EPS is only 2-4 kN / m3), the volume weight of the filled soil of the original platform is 18-19 kN / m3, and the loading of the platform can be greatly reduced through replacement by using the characteristics that the volume weight of the light soil is far smaller than the volume weight of the filled soil of the original platform; the light soil is different from the performance of granular substances of the filled soil, and has a little lateral pressure on a platform wall; and the effect of load-reducing is achieved, the sedimentation of the platform is eliminated, and excursion and limit-beyond of a platform wall can further be avoided.

Description

technical field [0001] The invention relates to the field of railway embankment engineering, in particular to a subsidence replacement repair structure and construction method of a railway station platform in a soft soil area. Background technique [0002] Soft soil foundation is the most common special soil roadbed in my country's railway construction. Because soft soil has the characteristics of high moisture content, high void ratio, low strength, and high compressibility, the settlement of the foundation is very large when the roadbed is filled on it. . [0003] At present, whether it is a normal-speed railway or a high-speed railway, there are many stations built on soft soil foundations, and the soft soil foundations of lacustrine plains and marine plains in East China, South China, and coastal areas are the most typical. In the early general-speed railway, the platform of the station on soft soil foundation basically did not undergo foundation treatment, and the settl...

AI Technical Summary

Problems solved by technology

During the reconstruction of existing lines, some old-fashioned platforms need to be heightened, and the increased load will inevitably lead to platform settlement

For the railways built in recent years, the foundation treatment of the platform foundation is generally carried out by means of drainage consolidation and composite foundation, and the post-construction settlement of most of the platforms has been effectively controlled; Affected by the impact, a few station platforms also suffered from subsidence diseases

[0004] When the platform subsidence is serious, the platform and the train ground form a staggered platform, which affects the normal disembarkation of passengers; serious uneven settlement will also cause the platform wall to shift and intrude, affecting the safety of train operation

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