Simultaneous Construction Method of Shield Crossing Piston Air Duct and Upper Structure of Piston Air Duct

Abstract

The invention relates to the technical field of subway construction and particularly relates to a method for synchronously constructing a shield crossing piston air duct and a piston air dust upper structure. The segmented flow construction is employed by a second floor underground, the conversion of an inner support force system is reasonably completed, and a reliable reaction support system is provided for the passing of a shield. During the construction of a soil mold, a pit precipitation well is introduced out, and the stability of a piston air duct bottom plate structure in construction is ensured. After the construction of a middle plate, a middle plate hole is blocked by using a hole blocking plate, therefore, piston structure upper and lower structures are completely isolated, a closed space is provided for the shield crossing piston air duct, an effective reaction support is formed, an end reinforcement process is avoided, and the construction of the piston air dust upper structure is carried out simultaneously. According to the method, the problem that the shield crossing piston air duct and the piston air dust upper structure cannot be synchronously constructed is effectively solved, and the method has the advantages of reasonable operation, high safety and reliability, the effective avoidance of slow work, and the effective shortening of a construction period.

Description

technical field [0001] The invention relates to the technical field of urban rail transit and subway construction, and more specifically, relates to a method for synchronous construction of a shield passing through a piston air duct and an upper structure of the piston air duct. Background technique [0002] With the rapid development of my country's urban rail transit construction, the intensity of subway construction continues to increase. Urban subway construction is affected by many factors such as pipeline relocation, traffic diversion, land acquisition and demolition, etc., resulting in a tight subway construction schedule. The main structure of the piston air shaft is generally buried deep, and it is faced with multiple receiving and launching of shield tunneling within a short distance. The risk of construction operation is high, and the reinforcement space at the end is limited and the reinforcement period is long, which brings great risks to construction safety. R...

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a method for synchronous construction of the shield tunnel through the piston air duct and the upper structure of the piston air duct, which solves the problem of the shield tunnel passing through the piston air shaft in the prior art due to the underground space being affected. It is impossible to carry out end reinforcement, the construction period is tight and the construction cannot be carried out synchronously.

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