Open-cut station body structure and construction method thereof

Abstract

The invention discloses an open-cut station body structure and a construction method thereof. A station body is of a two-layer double-column three-span box-shaped structure. The construction method includes the steps that a site is leveled, a precipitation well is dug, precipitation is carried out, foundation pit drainage measures are taken, and cast-in-situ bored piles are arranged; a foundationpit is dug to the depth 0.7 m below a first support, pile top crown beams are arranged, and the first steel support is erected; the foundation pit continues to be dug downwards to the bottom of the foundation pit, a second support and a third support are sequentially erected, and waist rails are put in time; a bottom plate concrete structure is poured, side wall waterproof layers are arranged, andpart of side walls are poured; inverted supports are arranged, the third steel support is detached, and a remaining side wall structure on the second floor underground and a middle plate structure onthe first floor underground are poured; and the second steel support is detached, a side wall and top plate structure on the first layer underground is poured, a top plate waterproof layer is arranged, timely backfill is carried out, backfill is carried out to the position of the first steel support, the first steel support and the inverted supports are detached after a soil layer is compacted, backfill is carried out to the ground, and a station plate structure and other internal components are arranged.

Description

technical field [0001] The invention relates to the technical field of subway engineering structures, more specifically, it relates to a main structure of an open-cut station and a construction method thereof. Background technique [0002] With the rapid development of subway construction in major domestic cities, subway travel has become one of the most important daily transportation options in the city, and with the continuous development of the domestic economy, the construction of underground rail transit in many cities is currently in full swing. Both the subway and the urban comprehensive pipe gallery are laid along the main roads of the city; the construction of the subway also needs to adapt to various geological conditions, and at the same time, the complex underground environment poses a severe test to the durability of the subway structure. [0003] At present, the shield tunneling method used in open-cut stations makes the shield machine less flexible during cons...

AI Technical Summary

Problems solved by technology

[0003] At present, the shield tunneling method used in open-cut stations makes the shield machine less flexible during construction, and its repeated disassembly, assembly, disassembly, dragging and passing stations greatly reduces the service life of the shield machine

At the same time, the additional construction costs caused by the construction of the shield launching shaft, receiving shaft, and U-turn shaft, as well as the dismantling, hoisting, and transition of the shield machine, make the project cost per km in the shield tunneling method relatively high. The cost of normal propulsion of the machine increases by nearly 10%; and for the dragging of the shield machine to pass the station, it involves the additional cost of deepening and widening the station, which increases by about 6% to 8% per km

Images