| This paper chose the scientific and reasonable construction method to replace combination switch of TONG-LIAO station for speed-lift.Based on the fact of busy transportation and the confined filed, the paper adopets prevalent decision-making method -Analytic Hierarchy Process to analyse and calculate the five construction methods. The scheme of "disjointing switch to construct, prefabricate dispersedly, transition in the middle and continuous costruction" is confirmed. Cost is reduced and quality and safety id ensured to optimize the scheme and design new construction machines and tools. The construction effect is obvious.The paper begins with the investigation of the location of current switches analyses the technical factors of locale collocation, the traveling crane requirements and switches. And then the location design of is optimized, which makes the not only meet with the technical standards but also decrease the cost the rep-aeration of operating equipments.The paper details the construction safety , technique and organization methods from some aspects such as the location, the pushing process, and the labor distribution. It Is promised the perfect accomplishment of engineering construction may reach by optimizing the construction program, and that a better economy effect may get through reasonably decomposing the working procedure and alloy of work force.Combining the rules of conserve railroad equipments, with the structure and the force peculiarity of. To stability the switch fundament as fast as possible , and sustain the structure strength and track framework rigidity, the check method, repair and item of are discussed. Furthermore, the problems how to bring into play the technical character of in the and operation.
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