Comprehensive protective system for open-cut subway station under strongly corrosive environment and construction method for comprehensive protective system

Abstract

The invention relates to a comprehensive protective system for an open-cut subway station under strongly corrosive environment and a construction method for the comprehensive protective system. Under the strongly corrosive environment, concrete durability requirements cannot be met according to existing specifications. The comprehensive protective system is characterized in that a complete outsourcing reinforced waterproof layer is arranged outside a top plate, a bottom plate and a side wall of the station; upper portion of the reinforced waterproof layer of the top plate is compacted by an overburden layer; a plain concrete cushion layer is arranged below the reinforced waterproof layer of the bottom plate; and the outer side of the reinforced waterproof layer of the side wall and a station main body foundation pit supporting structure at the outer side of the side wall are compacted by an isolating layer. On the basis of a common waterproof system of the open-cut subway station, an anticorrosion layer and an isolating layer are additionally arranged, and high-performance concrete and the like are adopted, so that concrete durability requirements are met, and therefore, the comprehensive protective system has wide application space in part of coastal and inland salty soil regions of China. On the basis of the waterproof system of the open-cut subway station, the comprehensive protective system has the characteristics of simple, convenient and flexible construction processes, strong operability, less increased investment, strong adaption, safety, reliability and the like.

Description

technical field [0001] The invention relates to the technical field of subway engineering structures, in particular to a comprehensive protection system for open-cut subway stations in a strongly corrosive environment and a construction method thereof. Background technique [0002] With the rapid development of subway construction in major cities in China, subway travel has become one of the most important daily transportation options in the city. Subway construction also needs to adapt to various geological conditions. At the same time, the complex underground environment poses a severe test to the durability of subway structures. . [0003] The design service life of the subway project is 100 years. The "Code for Durability Design of Concrete Structures" (GB / T50476-2008) puts forward specific requirements and control indicators for the design of concrete durability according to the environmental category and environmental effect level of the project environment. However, ...

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Problems solved by technology

However, in some coastal and inland saline soil areas in my country, CL in water and soil - , SO 4 2- The content of corrosive media and other corrosive media

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