Construction method for subway station body

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.

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...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned construction method of the main body of the subway station has the following defects: long construction period, low efficiency, and poor safety risk control

Images