Excavation construction method and protection system for deep cutting near railway business line

Abstract

The invention discloses a deep cutting excavation construction method and protection system close to a railway business line, and relates to the technical field of high-speed railway deep cutting construction. The construction method comprises the steps that firstly, a slope low section protection system is established in a slope low section excavated close to the railway business line; a slope high and steep section protection system is established in a slope high and steep section excavated close to the railway business line; after the slope low section protection system and the slope high and steep section protection system are established, stone blocking channels are excavated step by step; after the stone blocking channel is excavated and formed, high and low section cutting is excavated step by step in a layered mode, and when each layer of cutting is excavated, excavation is conducted from the two sides of the stone blocking channel to the interior of the stone blocking channel. According to the construction method, site construction operation is facilitated, the requirements of various safety protection levels are met, normal operation of the existing railway business line is not affected, construction safety is improved, the construction period is shortened, cost is reduced, and economic benefits are remarkable.

Description

technical field [0001] The invention relates to the technical field of high-speed railway deep cutting construction, in particular to a deep cutting construction method and a protection system adjacent to a railway business line. Background technique [0002] As my country is building the world's largest and most modernized high-speed railway network, the high-speed railway engineering construction technology that adapts to the complex and changeable geological and topographical conditions in my country is gradually developing and improving. Among the high-speed railway projects under construction, there are many new high-speed railway lines and existing railway business lines that are parallel, spanned, and drilled down. The construction is difficult and the safety risk is high. [0003] Due to poor geological conditions in mountainous areas, broken rock mass, severe weathering, development of joints and fissures, and the existence of side slopes and other unfavorable geol...

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Problems solved by technology

[0004] The present invention aims at that when the newly-built high-speed railway construction site is a deep cutting, the existing railway business lines parallel to it are distributed on both sides of the newly-built line. Improper type and improper construction method will lead to dangerous rockfall generated by excavation entering the existing railway business line, resulting in safety accidents. Problems affecting construction progress and efficiency

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