A Trenchless Pipe Curtain Method Using Curved Pipe Shed

Abstract

The invention discloses a non-digging pipe curtain method using a curve pipe roof. The method comprises the following construction steps that A, an inverted arch and an arch top are jacked into a position between two parallel tunnels for curve pipe roof curtain construction; in addition, the pipe jacking work of the inverted arch and the arch top is alternately performed; the step-by-step forward advancing is performed; the arch top and inverted arch pipe curtain construction is completed; B, upper and lower pipe roofs of the pipe curtain are engaged or the upper and lower pipe curtain end parts are reinforced; C, freezing water stop is performed between the pipe roofs; D, after the freezing completion, shielding pipe pieces are dismounted in different layers; regions between two shielding tunnels are dug in different regions; F, after digging completion, inside lining structure construction is performed. The method can be used for the extension building digging at the highway shielding tunnel merging position, extension digging in the road shielding tunnel branch position or the extension digging construction between subway shielding tunnels as subway stations and the like. The method has the advantages that the ground surface digging can be reduced to the maximum degree; the construction period is shortened; the construction safety is improved.

Description

technical field [0001] The invention relates to a construction method of a tunnel and a special underground structure, in particular to a non-excavation pipe curtain method using a curved pipe shed. Background technique [0002] With the acceleration of China's urbanization process, more and more large-scale underground structures are built under urban roads, such as subway stations and urban underground roads. At present, the construction of urban subway stations, urban underground roads and other projects, such as the underground confluence of highway shield tunnels, or the construction of underground stations of subway shield tunnels, mainly includes open-cut method, underground method and trenchless pipe-curtain method. The open-cut method not only damages the environment, but also excavates the original ground, which hinders the smooth flow of traffic and greatly interferes with urban life. When the construction site is under an existing building, the open-cut method ca...

AI Technical Summary

Problems solved by technology

The open-cut method not only damages the environment, but also excavates the original ground, which hinders the smooth flow of traffic and greatly interferes with urban life, and when the construction site is under an existing building, it is impossible to use the open-cut method for construction

When the geological conditions are poor and the buried depth is relatively deep, if underground excavation is used for construction, the safety risk is greater, especially when the construction site is under an existing building, the control of ground subsidence by underground excavation construction often cannot meet the standards, and it is easy to Cause damage to existing structures on the surface

The non-excavation pipe curtain method basically avoids the shortcomings of the open cut method and the underground excavation method, but it still needs to excavate a small area of ​​the ground; at present, the three-dimensional pipe curtain method also needs to excavate the working shaft and the horizontal working channel first, and the construction efficiency Low, serious waste of material

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