Rail vibration reduction ballast bed device

Abstract

The embodiment of the invention provides a rail vibration reduction ballast bed device. According to the device, multiple hole grooves are formed in the positions, a certain distance away from the outer sides of steel rails on the two sides, on a rail overall ballast bed. The hole grooves in the same side are distributed to form a hole array, and each hole array is parallel to the steel rail on the same side. Multiple second row hole grooves are formed in the outer sides which are a certain distance away from the first row hole grooves. The second row hole grooves in the same side are distributed to form a second row hole array parallel to the steel rail on the same side. Multiple single hole grooves and hole arrays are dug in the positions which are a certain distance away from the outer sides of the steel rails on the two sides of the overall ballast bed; the hole array ballast bed generates interference on incident vibration waves through the hole arrays so that the vibration waves can be reflected, scattered and diffracted, generated infrasound vibration waves and the incident vibration waves act on each other and mutually offset, and accordingly the aims of vibration reduction and noise lowering are achieved; the hole array ballast bed can adjust vibration reduction performance by changing the cross section area, the depth and / or single body distance of single bodies in the hole arrays.

Description

technical field [0001] The invention relates to the technical field of rail vibration damping, in particular to a rail vibration damping track bed device. Background technique [0002] Urban rail transit is the most effective way to alleviate urban traffic problems, and it has developed rapidly in recent years. The purpose of rail transit construction determines that most of the rail transit lines are located in densely populated areas, which inevitably pass through vibration-sensitive areas such as hospitals, research institutes, ancient buildings, and residential areas that use precision instruments and equipment. The vibration caused by the train operation will have an impact on the building itself, the normal life and work of residents, and the normal use of precision instruments and equipment. At present, a large number of complaints have been generated after the operation of some new subway lines, which has become one of the major problems faced by the government afte...

AI Technical Summary

Problems solved by technology

Although different vibration reduction measures have been selected in the vibration reduction design to reduce the investment in vibration reduction, in general, the investment in vibration reduction measures in rail transit still occupies a relatively high proportion

Taking Beijing Metro Line 5 as an example, the length of its vibration reduction line is 53% of the total length of the line. Even though various levels of vibration reduction measures are adopted for design, the investment in the vibration reduction section still accounts for 22% of the total investment of the track. %; while Beijing Metro Line 4 adopted four kinds of vibration reduction measures, the total length of the vibration reduction line accounted for 31% of the total line length, but the investment in the vibration reduction section exceeded 31% of the total investment in the track

Whether the vibration reduction effect of these vibration reduction measures meets the requirements is still inconclusive, but because there are too many types of vibration reduction measures, and most of these measures use the stiffness of the fasteners to achieve the purpose of vibration reduction, resulting in a large change in the stiffness of the entire line, The mismatch between wheel and rail induces abnormal rail corrugation. For example, Beijing Metro Line 5 adopted 5 types of vibration reduction measures, and Metro Line 4 adopted 4 types of vibration reduction measures. However, large-scale explosions occurred soon after the opening of these lines. The phenomenon of rail corrugation, on the contrary, aggravates the impact of vibration and noise, and at the same time increases the cost of repair and maintenance, and buryes a huge safety hazard for the operation and management of rail transit

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