Construction method of excavating outsized-section subway underground excavation station by utilizing main layered adit and auxiliary layered adit

Abstract

The invention relates to the technical field of tunnel construction, and provides a construction method of constructing an outsized-section subway underground excavation station by utilizing layered auxiliary adits. The construction method comprises the steps that a main adit enters a station hall layer, an auxiliary adit is branched to enter a platform layer, and the two adits are arranged for asuper-large section tunnel and enter the upper portion and the lower portion of the tunnel correspondingly; and the main adit provides a channel for excavation construction of the upper portion of thetunnel, and the auxiliary adit provides a channel for excavation construction of the lower portion of the tunnel. By utilizing the contact channel formed by a door-type arch frame, the number of excavation faces is greatly increased, muck removing and material conveying are not mutually interfered, operation of all machines is facilitated, and quick and safe assembly-line operation is formed; during later construction of an inverted arch, an arch wall lining and a platrform layer structure, goods and materials can directly be transported and enter through the auxiliary adit; and during construction of the station hall layer structure and a wind pavilion group and an exit and entrance structure, goods and materials can directly be transported and enter through the main adit, the working efficiency is improved, and the construction progress is greatly accelerated.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a construction method for excavating an extra-large cross-section subway underground excavation station by using main and auxiliary layered tunnels. Background technique [0002] During the construction of large-section tunnels in urban subway stations, in order to ensure the safety and speed of tunnel construction, a vertical shaft or a tunnel is generally used to enter the large-section tunnel, and then excavated to both sides. However, unreasonable phenomena may appear in the above-mentioned manner. It is relatively slow to use vertical shafts to transport muck, steel bars, concrete and other materials. When a tunnel enters a large-section tunnel, there are many mutual interferences in the construction, and the excavation surface is too small, resulting in a slow construction speed of the overall tunnel, and in the case of mutual interference construction, there...

AI Technical Summary

Problems solved by technology

When a tunnel enters a large-section tunnel, there are many mutual interferences in the construction, and the excavation surface is too small, resulting in a slow construction speed of the overall tunnel, and in the case of mutual interference construction, there will be certain safety hazards, especially for large-section tunnels Construction, the situation is more serious

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