A steel pipe curtain structure support system and its construction method

Abstract

The invention discloses a novel steel pipe curtain structure supporting and protecting system and a construction method thereof and relates to the technical field of underground excavation supporting and protecting. According to the novel steel pipe curtain structure supporting and protecting system and the construction method thereof, the problem that in the prior art, stress between joints of adjacent steel pipes in a pipe curtain structure is weak, so that a large number of temporary supports need to be erected to guarantee stability of the overall structure is solved. The novel steel pipe curtain structure comprises first steel pipes, second steel pipes and third steel pipes; and the multiple first steel pipes are arranged in sequence to form an n-shaped structure, every two adjacent first steel pipes are connected through the third steel pipes, two supporting feet of the n-shaped structure formed by the first steel pipes are provided with two second steel pipes which are located at the same horizontal plane, and concrete is injected into the first steel pipes, the second steel pipes and the third steel pipes. According to the novel steel pipe curtain structure supporting and protecting system and the construction method thereof, the transverse stiffness and the bearing capacity of the pipe curtain supporting and protecting system are improved, a large number of temporary supports do not need to be erected, construction cost is reduced, the construction period is shortened, the construction procedure is simplified, ground surface settlement is effectively prevented, and the construction quality is improved.

Description

technical field [0001] The invention relates to the technical field of underground excavation support, and more specifically relates to a steel pipe curtain structural support system and a construction method thereof. Background technique [0002] At present, there is less and less developable space on the ground, and the development of underground space is an inevitable trend of international metropolises. The construction of large underground spaces such as subway stations generally adopts underground excavation. The pipe curtain construction method is a new type of underground excavation technology. It is a construction method for constructing large-span section underground excavation projects on the basis of large-diameter steel pipe densely packed support. It is especially suitable for urban buildings with dense buildings and ground traffic. It has obvious advantages in busy road sections, passing through existing important structures and buildings, ultra-shallow buried...

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Problems solved by technology

[0004] The invention provides a steel pipe curtain structure support system and its construction method, which is used to solve the problem in the prior art that the joints of adjacent steel pipes in the pipe curtain structure are weakly stressed, and a large number of temporary supports need to be erected to ensure the stability of the overall structure

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