Research On Environmental Slurry Treatment Of Shield Tunnel Construction

With the wide application of shield in underground tunnel construction, inevitably varying degrees of impact on the surrounding environment. In recent years the domestic span development of tunnel construction, shield tunnel construction on the surrounding environment influence the depth and breadth of increasing, strengthen environmental protection problem is particularly prominent. Slurry balance shield construction method, in particular, in the construction of the waste pulp may produce a lot of, if not scientific treatment, pollution to the environment is unable to estimate.Beijing underground below the diameter of shield tunnel is located in the urban arterial road, tunnel surrounding environment is extremely complex, involving both the metro, houses, Bridges, and underground pipeline, such as major risk source, 23 from other risk source in 105. Shield tunnel is mainly through the formation of: round gravel and pebble soil, average particle size 20 ~ 60 mm, west pebble grain size gradually increased, the largest diameter of 200 mm, high underground water level. This paper absorbs the Beijing underground line diameter of shield construction and many mud treatment system innovation practice experience, technology of slurry shield construction of environmental protection mud treatment system are studied; In urban flourishing region of large diameter slurry shield construction site is narrow, mud treatment is difficult technical problems, such as technology to form a complete set of mud is studied. Through study by using waste pulp and processing technology, the rational allocation of equipment, optimization of construction technology, realize the wastewater emissions, energy conservation and emissions reduction.