Floating track bed precast slab and construction method for precast slab assembled floating track bed

Abstract

The invention discloses a construction method for a precast slab assembled floating track bed, which includes the following steps: laying a circuit center line of a base of a floating track bed and encrypted disjunction marks for positioning of precast slab main bodies; laying a hoisting control line of the precast slab main bodies and placing a position control line of side vibration isolators; mounting the side vibration isolators and present precast slab main bodies; placing vibration isolator inner sleeves in outer sleeve devices; laying adjacent precast slab main bodies along the extending direction of the circuit of the base of the floating track bed and connecting the adjacent precast slab main bodies with the present precast slab main bodies into a whole; and sequentially laying a plurality of precast slab main bodies along the extending direction of the circuit of the base of the floating track bed until an integral floating track bed is formed. The invention further provides a floating track bed precast slab for splicing the floating track bed. The construction method for the assembled floating track bed, provided by the invention, has simple construction procedures, short construction period, high construction efficiency and high construction quality, and facilitates safety inspection on the floating track bed in the follow-up utilization, and damaged components in failure are replaceable.

Description

technical field [0001] The invention relates to the technical field of rail transit construction, in particular to a construction method of a prefabricated slab-assembled floating ballast bed. Background technique [0002] The steel spring floating slab is a new type of high-grade track vibration isolation mainstream technology widely used in the subway industry in recent years. , constitutes a classic "mass-spring" vibration isolation system, which has three-dimensional elasticity and stability, and can suppress and absorb solid-borne sound transmission, thereby reducing the impact of rail transit on the surrounding environment's vibration and noise, so it is used in domestic urban rail transit It has been more than ten years and has broad application prospects. At present, Beijing has promulgated the local standard "Technical Specifications for Urban Rail Transit Spring Floating Slab Track" to standardize the design, construction, acceptance, testing, maintenance and repa...

AI Technical Summary

Problems solved by technology

Using this construction method can speed up the construction progress to a certain extent and improve construction efficiency. However, this construction method has the following disadvantages: it is necessary to pre-arrange multiple pads on the floating ballast bed base, which increases the construction cost. The preparation work wastes manpower and time; the inner sleeve of the vibration isolator is installed on the prefabricated floating plate before installing the side-mounted vibration isolator, so it needs to be adjusted repeatedly, which increases the construction time and affects the construction progress; Adjacent prefabricated floating slabs need to be connected and fixed by shear hinges, which are pre-buried in the prefabricated floating slabs and cannot be inspected. Once damaged and invalid, they cannot be replaced, which will adversely affect the track structure and train operation.

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