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Subway station construction method combining small-diameter jacking pipe with double-layer six-hole pile

A construction method and technology for subway stations, which are used in earth-moving drilling, underground chambers, and shaft equipment, etc., can solve the problems of steel pipes affected by self-weight, high jacking force requirements, and impact on pipe jacking accuracy, etc. The effect of reducing the number of pipe jacking and improving construction safety

Active Publication Date: 2021-12-28
THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP +1
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Problems solved by technology

However, since large-diameter steel pipes have high requirements for jacking thrust during the jacking process, and the ability to avoid obstacles is poor, the steel pipes vertically arranged on both sides are affected by their own weight, making it difficult to effectively correct deviations and affect the precision of pipe jacking. resulting in excessively long

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  • Subway station construction method combining small-diameter jacking pipe with double-layer six-hole pile
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  • Subway station construction method combining small-diameter jacking pipe with double-layer six-hole pile

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[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] A construction method for a subway station combining small-diameter pipe jacking with double-layer six-hole piles, which specifically includes the following steps:

[0035] (1), after the construction of the enclosure structure 29 at both ends of the underground excavation section is completed, the soil outside the pipe jacking is excavated to 1 meter below the pipe jacking, and pipe jacking equipment is installed in the foundation pit of the working wel...

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Abstract

The invention discloses a subway station construction method combining a small-diameter jacking pipe with a double-layer six-hole pile. The subway station construction method comprises the following steps that after construction of an underground excavation section enclosure structure is completed, a small-diameter steel pipe is jacked, and then concrete is poured to form a pipe curtain structure; the construction of double-layer six pilot tunnels is carried out under the ground according to the principle of first bottom to top, L-shaped foundations are constructed in the pilot tunnels on the two sides of the lower layer, then manual hole digging piles are constructed through the pilot tunnels on the upper layer, longitudinal top beams are poured, and back backfilling is carried out; and a bottom longitudinal beam is constructed in a lower-layer middle pilot tunnel, then a top transverse pilot tunnel is constructed, excavation is carried out downwards from the top transverse pilot tunnel, steel pipe stand column piles are poured, then a top cross beam is constructed, then an upper-layer area is excavated, an upper-layer pilot tunnel supporting upper layer is broken, finally a lower-layer area is excavated, and a lower-layer pilot tunnel supporting lower layer is broken. The pipe curtain structure is combined with the top cross beam, the two sides are supported by the manual hole digging piles and the middle plates, effective supporting is formed, the structural stability is enhanced, ground subsidence can be controlled easily, the construction period is effectively shortened, and cost is saved.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a subway station construction method combining small-diameter pipe jacking with double-layer six-hole piles. Background technique [0002] With the rapid development of urban infrastructure, subway construction has gradually become the subject of urban public transportation planning. When the subway station needs to cross the traffic arterial road or pass through the existing structures, in order to reduce the impact of the construction, the underground excavation method is mostly used at present, and the pipe curtain construction method is a kind of underground excavation method, which can significantly reduce the surface settlement and realize shallow burial or Safe construction of underground structures under ultra-shallow buried conditions. However, since large-diameter steel pipes have high requirements for jacking thrust during the jacking process, and the ability to avo...

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Application Information

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IPC IPC(8): E21D11/10
CPCE21D11/107Y02E10/20
Inventor 卢彦军赵文夏云朋白正操刘路涛王庆龙
Owner THE FIFTH ENG CO LTD OF CHINA TIESIJU CIVIL ENG GRP
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