Improvement of SDCA Based Relay Chain Spiral Cycle Technology
Aiming at the SDCA cycle with the advantages of standardisation and maintenance of the existing improve-ment effect and the Relay Chain Helix(RCH)cycle technology with the characteristics of weekly,cyclic control and gradual improvement,this paper proposes an improvement model of the RCH cycle technology(RCH-SDCA)based on the SDCA cycle.The principle,working steps and workflow of the RCH-SDCA model are studied.The RCH-SDCA cy-cle is applied to a water supply tunnel excavation project,which solves the problems of strong vibration sensation pro-duced in the blasting process,and the rock on the edge of the tunnel does not reach the blasting effect,forms the blasting construction standard,and improves the efficiency of blasting in the hydraulic tunnel as well as the safety.
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