Construction method for subway station body

A construction method and technology for subway stations, applied in building construction and the construction field of the main body of subway stations, can solve the problems of long construction period, poor safety risk control, and low efficiency, and achieve the effects of short construction period, safe construction, and high efficiency

CN103821167AInactive Publication Date: 2014-05-28BEIJING MUNICIPAL CONSTR
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-05-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a construction method for a subway station body. The construction method includes the following steps that pilot tunnels are excavated, and primary support is constructed; after cutthrough of each lower pilot tunnel, a strip-shaped foundation of each lower side pilot tunnel is constructed; pile top beams and large arch springings are constructed on the upper layer side pilot tunnels in a moulding mode; the inner side of the upper layer middle pilot tunnel is reinforced through a top longitudinal beam, a ground layer is reinforced through preliminary grouting in advance, and a soil body part I is excavated symmetrically left and right; a soil body part II is symmetrically excavated, and arch primary support is constructed; after cutthrough of the primary support, a medium partition, a waterproof plate and a protective layer are cut off in a segment mode through an inverted supporting method; excavation is downwards performed in a layered mode in the longitudinal direction of a subway station to the bottom elevation of a station hall plate; after medium plate concrete reaches design strength, excavation is downwards performed in a layered mode by 3.5 m along the longitudinal direction of the station; slope excavation is longitudinally performed downwards in a layered and segment mode to the position of 370 mm below the bottom elevation of the station hall plate according to the scale of 1:1, a thick section steel sprayed mixed cushion layer, a waterproof layer and a waterproof protective layer are constructed; a side wall waterproof layer is laid, and side wall concrete is poured; an inner structure is constructed to finish structure construction of the station. The construction method has the advantages of being high in efficiency, short in construction period, safe in construction and the like.
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Description

Technical field

[0001] The invention relates to a building construction method, in particular to a construction method for a subway station main body, and belongs to the technical field of civil engineering.

Background technique

[0002] The main body of the subway station in the prior art mainly adopts the hole pile method for construction, and its overall construction sequence is as follows:

[0003] ①Complete the primary support buckle arch and strengthening measures of the main structure in the transverse passage, so that the force transmission path of the transverse passage is converted from the top plate-side wall-bottom plate-ground to the top plate of the transverse passage-the primary support roof of the main structure-crown beam And the top longitudinal beam - steel pipe concrete column and side pile - bottom longitudinal beam and strip foundation - stratum.

[0004] ②The primary support buckle arch of the main structure starts from the direction away from the...

Examples

Embodiment Construction

[0034] The present invention is a kind of construction method of subway station main body, and it comprises following technological steps:

[0035] 1), through the pre-grouting of the advanced small conduit 1 to strengthen the formation, excavate the pilot tunnel 2, and implement the initial support; when excavating the pilot tunnel, first excavate the lower pilot tunnel and then excavate the upper pilot tunnel After the pilot tunnel, the pilot tunnel is excavated; among them, the pilot tunnel is excavated by step method;

[0036] 2), after the lower pilot tunnel is penetrated, step back and construct the strip foundation 3 in the lower pilot tunnel; construct side piles 4 in the upper pilot tunnel, and backfill with C20 concrete 5 between the outside of the side piles and the pilot tunnel; construct in the middle pilot tunnel Digging holes for concrete-filled steel pipe columns between the upper and lower pilot tunnels, and the bottom longitudinal beam 6 of the middle column;...