Construction method for continuous underneath passing of large-diameter water delivery pipeline in shield section

Abstract

The invention provides a construction method for continuously and downwards penetrating a large-diameter water conveying pipeline in a shield interval. The construction method is mainly used for construction of continuous downward penetration of at least two large-diameter water delivery pipelines in a large-diameter shield section, and the downward penetration area is provided with an overhaul well of the water delivery pipelines. The construction method sequentially comprises the processes of reinforcement of a shield section left and right line underneath penetrating water conveying line range and a water conveying pipe overhaul well, reinforcement of a pipe shed vertical shaft construction range, pipe shed vertical shaft construction, monitoring point burying, shield trial tunneling and radial grouting reinforcement in the shield underneath penetrating process. The construction method is high in universality, orderly in procedure connection and small in cross operation influence, the related problem that a large-diameter water conveying pipeline continuously and downwards penetrates through the shield section is solved, the construction method can be widely applied to construction of downwards penetrating through other buildings (structures) in the shield section, the construction quality of the shield section tunnel is guaranteed, and the construction period is shortened. And breakage of the large-diameter water delivery pipeline is avoided.

Description

technical field [0001] The invention provides the field of construction of shield tunnels running down large-diameter water pipelines, in particular to a construction method for continuously descending large-diameter water pipelines in shield sections. Background technique [0002] The subway is a fast, large-capacity, electric-driven rail transit built in the city. The trains run on fully enclosed lines. The lines located in the central urban area are basically set in underground tunnels. In the existing technology, the construction of subway tunnels is usually With the shield tunneling method, due to the intricate layout of pipelines under mature urban trunk roads, it is inevitable for shield tunneling machines to pass through pipelines in the process of subway construction. The damage to the pipeline is particularly serious. [0003] With the development of urban subways in China, the geological and environmental conditions are becoming more and more complex, and the sub...

AI Technical Summary

Problems solved by technology

[0002] The subway is a fast, large-capacity rail transit built in the city with electric traction. The train runs on a fully enclosed line, and the lines located in the central city are basically located in the underground tunnel. With the shield tunneling method, due to the intricate layout of the pipelines under the mature urban main roads, it is inevitable for the shield machine to pass through the pipelines during the subway construction process, especially in the water-rich and soft strata where the shield tunneling is difficult to control the surface settlement. The damage to the pipeline is particularly serious

[0003] With the development of urban subways in my country, the geological and environmental conditions are becoming more and more complex. The subway shield section often encounters the problem of passing through large-diameter water pipelines at close distances. Due to the short distance between the two large-diameter water pipelines, When the shield tunnel passes through the pipeline at a short distance, the control of pipeline settlement is high, the shield construction is difficult, and it is easy to settle after construction; however, once the pipeline settles or the differential settlement exceeds the warning value during the pass-through process, the pipeline cannot be used. Water cut-off will affect the production and life of residents in water-using cities, and will cause immeasurable economic losses

Moreover, during the construction of large-diameter water pipelines, there will also be maintenance wells for water pipelines. If there are maintenance wells in the area where the shield passes through the pipeline, the construction risk will be greater

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