Research on Shallow-buried Section Deformation Control and Construction Technology in Large-section Dry Fine Sand Strata
This paper describes in detail the construction scheme of using advanced horizontal rotary jet grouting pile advanced support,three-bench temporary inverted arch + vertical support,large locking foot steel pipe with diameter of 89 mm,radial grouting and adding sleeve arch on the inner side of the initial support in double-track high-speed railway large-section tunnel in dry fine sand strata.It overcomes the stratum problem of dry fine sand layer of double-track high-speed railway large-section tunnel and forms a set of construction technologies suitable for this strata,which aims to provide strong technical support for the safe,rapid and standardized construction of this geological type of tunnel,further improve the construction level of railway tunnel engineering,and create better social and economic benefits for the society.
fine silty sand stratumshallow-buried sectiontunnelradial grouting
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