A deep foundation pit cross construction method for subway transfer stations

Abstract

The invention discloses a cross construction method for deep foundation pits in a metro interchange station. The method comprises the following steps: completing the construction from a node-section foundation pit to a first inner support; completing the construction from standard-section foundation pits to the first inner support; and conducting cross construction of the node-section foundation pit and the standard-section foundation pits until the designed elevation is reached. In the construction process of the standard-section foundation pits, when standard-section foundation pit earth is excavated to the depth corresponding to the week position of a node-section foundation pit support structure, the construction of external supports and external gusset plates of the node-section foundation pit support structure is completed in the standard-section foundation pits first, and then standard-section foundation pit earth is excavated. According to the method provided by the invention, the cross construction of the node-section foundation pit and the standard-section foundation pits is realized by adopting the method that the external supports and the external gusset plates of the node-section foundation pit support structure are constructed in sequence in the standard-section foundation pits, and the construction time and the construction cost are shortened greatly.

Description

technical field [0001] The invention relates to a construction method of foundation pits, in particular to a cross construction method of adjacent deep foundation pits. Background technique [0002] At present, the construction of urban rail transit transfer stations, reserved transfer nodes, and adjacent deep foundation pits of other projects interferes with each other. Taking transfer stations as an example, the transfer nodes are generally constructed first, and the standard construction on both sides of the transfer nodes The back pressure soil is reserved in the section, and the earthwork, temporary support and main structure construction of the standard stations on both sides of the transfer node can only be carried out after the earthwork, temporary support and main structure of the transfer node are completed, which greatly increases the construction period and construction cost of the project , cannot be accepted by the construction unit. Contents of the invention...

AI Technical Summary

Problems solved by technology

[0002] At present, the construction of urban rail transit transfer stations, reserved transfer nodes, and adjacent deep foundation pits of other projects interferes with each other. Taking transfer stations as an example, the transfer nodes are generally constructed first, and the standard construction on both sides of the transfer nodes The back pressure soil is reserved in the section, and the earthwork, temporary support and main structure construction of the standard stations on both sides of the transfer node can only be carried out after the earthwork, temporary support and main structure of the transfer node are completed, which greatly increases the construction period and construction cost of the project , cannot be accepted by the construction unit

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