Construction method for supporting existing railway yard terrace roadbed in deep and thick artificial slag discarding area

Abstract

The invention discloses a construction method for supporting an existing railway yard terrace roadbed in a deep and thick artificial slag discarding area. The construction method comprises the following steps that A, land leveling is conducted on a site; B, earthwork is excavated to the designed base elevation; C, anchoring piles are constructed, and the anchoring piles are arranged in double rows in the supporting direction; D, soil bodies between the piles are excavated, and a cushion layer is constructed; E, the buttress retaining wall at the upper part of the pile top; F, wall back foam light soil filler and top filler of the retaining wall are constructed; and G, slope protection engineering of the top of the retaining wall is constructed. The construction quality of a supporting structure close to the existing line in the deep and thick artificial slag discarding area can be ensured, the stability of top supporting and a foundation in the artificial slag discarding area is ensured, post-construction settlement of the supporting foundation can be effectively controlled, the reliability of field retaining wall back filler construction is ensured, and it is ensured that running and driving safety of the existing line is not affected, and no damage is caused to the roadbed in subsequent operation.

Description

technical field [0001] The invention belongs to the technical field of railway special poor geological foundation reinforcement and protection engineering, and particularly relates to a construction method for supporting the existing railway yard subgrade in a deep artificial waste slag area. Background technique [0002] Railways play an irreplaceable role in economic development and national defense construction. It has had an important and far-reaching impact on politics, economy, culture, society and many other fields, and is a booster to accelerate the realization of national modernization. However, as a country with a large land and population, my country's regional development and resource distribution are extremely unbalanced, and it is necessary to adopt effective transportation methods to shorten the distance in order to achieve the largest and optimal allocation of resources. Railways have the advantages of safety, economy and strong effectiveness; railways have ...

AI Technical Summary

Problems solved by technology

The artificial spoil has a short time of formation, and has not been compacted. It has the physical characteristics of large porosity, loose soil, and low foundation bearing capacity. The general and single foundation reinforcement measures cannot meet the relevant requirements of the code.

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