Reverse construction method for vertical intersection between large high-speed rail station and subway

Abstract

The invention belongs to the technical field of subway station construction, and particularly relates to a reverse construction method for vertical intersection between a large high-speed rail station and a subway. The problem that a forward construction method is long in construction period and high in construction cost is solved. The reverse construction method for vertical intersection between the large high-speed rail station and the subway comprises the specific construction steps that (1) building axis is surveyed and set out; (2) construction of an underground diaphragm wall is carried out; (3) intermediate supporting piles are constructed; (4) a soil body in a pit is reinforced; (5) a dewatering well is constructed; (6) pre-processing of dewatering is carried out; (7) boundary layer floor slab foundation pits are excavated; (8) structural construction of a boundary layer floor slab is carried out; (9) the structure on the top of the boundary layer floor slab and a structure below a floor slab boundary layer are constructed at the same time. Due to the fact that the reverse construction method is adopted for construction, the overground structure and the underground structure are constructed at the same time, and the construction period of a concrete main structure is shortened by one third. Due to the fact that a retaining structure and a base structure are integrated, the high temporary support soil retaining cost, the high cost of foundation pit overexcavation earthwork and the high cost of water prevention can be reduced. Due to the fact that an original structure serves as an inner support, the cost of temporary supports in deep foundation pit supporting is reduced, and the construction period is shortened.

Description

technical field

[0001] The invention belongs to the technical field of subway station construction, and in particular relates to a construction method of a large-scale high-speed railway station and a subway with an upside-down intersection method. Background technique

[0002] With the acceleration of urbanization in our country, large-scale transportation hub projects are developing in the direction of multi-level three-dimensional and zero-distance transfer. Especially in the vicinity of the project, where there are important buildings with high levels of safety protection and railway lines, the construction of deep and large foundation pits under complex soft soil has problems such as long construction period, easy deformation, easy collapse, and high safety risks. The traditional straight method has the problems of long construction period and high construction cost. Contents of the invention

[0003] In order to solve the problems of long construction period and hig...