CN-121992689-A - Combined elastic short sleeper reconstruction method and track structure thereof

CN121992689ACN 121992689 ACN121992689 ACN 121992689ACN-121992689-A

Abstract

A combined elastic short sleeper reconstruction method and a track structure thereof belong to the technical field of urban rail transit track structures and have the technical scheme that the reconstruction method sequentially comprises the steps of lifting a track, extracting rubber sleeve shoes, cleaning sleepers and sleeper pits, installing a geometric shape position adjusting frame, brushing interface adhesives, pasting elastic backing plates, pouring materials, placing sleepers, replacing vibration reduction fasteners, adjusting geometric shape positions, detecting the strength of the pouring materials and the like; the improved track structure comprises a short sleeper, a composite elastic layer, a short sleeper geometric position adjusting frame and a vibration damping fastener for the short sleeper, wherein the composite elastic layer consists of an under-sleeper elastic base plate, a sleeper side elastic limit base plate and a quick-setting elastic damping pouring material to replace the original rubber boot, and the geometric position adjusting frame realizes accurate sleeper positioning and dynamic adjustment through a sleeper positioning frame, a telescopic connecting rod, a track gauge and a track bottom slope control spring system.

Inventors

DAI CHENGXIN
HUANG HUI
PAN PENG
ZHOU HAO
Lai Chenxiang
Long Zexian
LIU WENWU
TU QINMING
LUO XINWEI
YIN HUATUO
ZHANG XINYA
QIAN DINGWEI
WANG HAI
LIU TANGHUI

Assignees

广州地铁设计研究院股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260205

Claims (10)

1. The combined elastic short sleeper reforming track structure is characterized by comprising a short sleeper, an under-sleeper elastic backing plate, a sleeper side elastic limit backing plate, a quick setting elastic damping filling material, a short sleeper geometric shape position adjusting frame and a vibration damping fastener for the short sleeper, wherein the short sleeper is arranged above the short sleeper by the vibration damping fastener, the under-sleeper elastic backing plate is arranged between the bottom of the short sleeper and a track bed and is attached to the bottom of the short sleeper, the sleeper side elastic limit backing plate is arranged between the side surface of the short sleeper and the inner wall of a sleeper pit and is attached to the side surface of the short sleeper and the inner wall of the sleeper pit, the quick setting elastic damping filling material is filled in a gap formed by the short sleeper, the under-sleeper elastic backing plate, the sleeper side elastic limit backing plate, the track bed and the inner wall of the sleeper pit, and the short sleeper geometric shape adjusting frame wraps the lower part of the short sleeper and is matched with the short sleeper to realize positioning.
2. The structure of claim 1, wherein the under-sleeper elastic pad comprises an under-sleeper I-type elastic pad and an under-sleeper II-type elastic pad, the under-sleeper I-type elastic pad is distributed at a corner position of the short sleeper bottom and is tightly attached to the short sleeper bottom and the ballast bed, the under-sleeper II-type elastic pad is distributed at two sides of the middle of the short sleeper bottom and is tightly attached to the short sleeper bottom and the ballast bed, and the under-sleeper I-type elastic pad and the under-sleeper II-type elastic pad support the short sleeper together.
3. The structure of claim 1, wherein the sleeper side elastic limit pad comprises a sleeper side I-type elastic limit pad and a sleeper side II-type elastic limit pad, the sleeper side I-type elastic limit pad is distributed at corners of two long sides and middle parts of two short sides of the short sleeper and is attached to the side surfaces of the short sleeper and the inner wall of the sleeper pit, the sleeper side II-type elastic limit pad is distributed at two sides of the middle parts of two long sides of the short sleeper and is attached to the side surfaces of the short sleeper and the inner wall of the sleeper pit, and the sleeper side I-type elastic limit pad and the sleeper side II-type elastic limit pad jointly form transverse constraint on the short sleeper.
4. The structure according to claim 1, wherein the short sleeper geometry position adjusting frame comprises a sleeper positioning frame, a positioning frame telescopic connecting rod, a track gauge control spring system and a track bottom slope control spring system, the sleeper positioning frame wraps the half height of the lower portion of the short sleeper, two ends of the positioning frame telescopic connecting rod are respectively connected with the sleeper positioning frames on the left side and the right side, the track gauge control spring system is arranged in the middle of the positioning frame telescopic connecting rod and matched with the positioning frame telescopic connecting rod, and the track bottom slope control spring system is arranged on the sleeper positioning frame and matched with the short sleeper.
5. The structure of claim 4, wherein the sleeper positioning frame comprises a cover plate, a hoop plate and a cover plate rotating shaft, the cover plate and the hoop plate are matched to wrap the short sleeper, the cover plate rotating shaft is connected with the left side of the cover plate and the left side of the hoop plate, the rail bottom slope control spring system is connected with the cover plate and the right side of the hoop plate, and a preset transverse slope is arranged on the surface of the cover plate and is attached to the bottom of the short sleeper.
6. The structure of claim 4, wherein the gauge control spring system comprises a gauge knob, a gauge thread and a horizontal telescopic spring, the gauge thread is arranged in the middle of the positioning frame telescopic connecting rod, the gauge knob is in threaded connection with the gauge thread, the horizontal telescopic spring is sleeved on the positioning frame telescopic connecting rod and matched with the gauge knob, and the rotation of the gauge knob drives the horizontal telescopic spring to stretch and retract to adjust the gauge.
7. The structure of claim 4, wherein the rail bottom slope control spring system comprises a rail bottom slope knob, a rail bottom slope thread and a vertical extension spring, wherein the rail bottom slope thread is arranged on the right side of the sleeper positioning frame, the rail bottom slope knob is in threaded connection with the rail bottom slope thread, the vertical extension spring is arranged between the rail bottom slope knob and the cover plate, and the rotation of the rail bottom slope knob can drive the vertical extension spring to extend and retract so as to adjust the transverse slope of the cover plate.
8. The structure of claim 1, wherein the short sleeper is an existing concrete short sleeper, the quick setting elastic damping filling material is filled and bonded with the short sleeper, an under-sleeper elastic base plate, a sleeper side elastic limit base plate, a track bed and a sleeper pit inner wall, and the short sleeper is fixedly connected with the short sleeper by a vibration reduction fastener and is matched with a steel rail.
9. The modification method of the combined elastic short sleeper is characterized by comprising the following steps of: Lifting a rubber boot of an existing track to expose a short sleeper, extracting the rubber boot, cleaning the surface of the short sleeper and the inner side wall of a sleeper pit, installing a short sleeper geometric shape position adjusting frame, brushing interface adhesives on the surface of the short sleeper and the inner side wall of the sleeper pit, respectively sticking an elastic backing plate below the sleeper and an elastic limit backing plate on the side face of the short sleeper, pouring quick-setting elastic damping pouring materials into the sleeper pit, placing the short sleeper and replacing the short sleeper with a vibration damping fastener for the short sleeper, adjusting the geometric shape position of the track through the short sleeper geometric shape position adjusting frame, detecting whether the strength of the quick-setting elastic damping pouring materials reaches a design value, and finishing transformation.
10. The method of claim 9, wherein the under-sleeper elastic tie plate comprises under-sleeper I-shaped elastic tie plates distributed at corners of the bottom of the short sleeper and under-sleeper II-shaped elastic tie plates distributed at two sides of the middle of the bottom of the short sleeper, the under-sleeper side elastic limit tie plates comprise under-sleeper I-shaped elastic limit tie plates distributed at corners of the long sides and middle of the short sleeper and under-sleeper II-shaped elastic limit tie plates distributed at two sides of the middle of the long sides of the short sleeper, the short sleeper geometric shape position adjusting frame comprises sleeper positioning frames, positioning frame telescopic connecting rods, a track gauge control spring system and a track bottom slope control spring system, when the track geometric shape is adjusted, a track gauge knob of the track gauge control spring system is rotated to drive a horizontal telescopic spring to stretch out and draw back to adjust a track gauge, the track bottom slope is driven to stretch out and draw back by rotating the track bottom slope knob of the track bottom slope control spring system, and the quick setting elastic damping filling material is formed by mixing various materials, is filled in a sleeper, the under-sleeper elastic tie plate, the sleeper elastic limit tie plate, the track pit, a track pit and a gap, and an inner wall.

Description

Combined elastic short sleeper reconstruction method and track structure thereof Technical Field The application belongs to the technical field of urban rail transit track structures, and particularly relates to the technical field of vibration reduction transformation and geometric shape and position optimization of an existing elastic short sleeper track. Background In urban rail transit, the elastic short sleeper is widely applied as a medium vibration reduction track structure, and mainly comprises a concrete short sleeper, rubber elastic sleeve shoes and a reinforced concrete track bed, wherein the working principle is that the elastic deformation of the rubber elastic sleeve shoes is used for reducing the vertical rigidity of a track system and improving the damping, so that the vibration transmitted to a tunnel structure is reduced, and compared with the common track bed, the elastic short sleeper can realize a certain vibration reduction effect and is a common vibration reduction track type in early subway systems in China. Along with the increase of the operation time, the actual measurement condition of a large number of lines shows that the vibration reduction effect of the elastic short sleeper is greatly reduced and even lower than the design standard, thereby causing complaints of surrounding residents. Rubber elastic boots are in a complex environment with high pressure, humidity and dynamic load for a long time, and are easy to creep, age, crack and rigidify, so that the vibration damping performance of a track system gradually declines with time. Meanwhile, uneven settlement and aging of the rubber elastic sleeve shoe can enable the short sleeper to have empty hanging and uneven supporting conditions, so that the track surface is unsmooth, abnormal shaking or shaking is generated when a train passes through, the experience of passengers is affected, the workload and cost of fine adjustment and maintenance of a working department are increased, and even running safety is threatened. The existing elastic short sleeper also has a plurality of inherent defects. The rubber elastic sleeve boot body structure is fragile, longitudinal and transverse cracks are easy to occur under the action of complex wheel rail force, and the rubber elastic sleeve boot body is broken and completely loses the elastic function when serious. Under the long-term effect of the train circulating load, the bonding interface between the rubber elastic sleeve shoe and the short sleeper and between the rubber elastic sleeve shoe and the track bed concrete is easy to fail, stripping and gaps appear, the gaps can become passages of accumulated water and slurry, the existence of water can accelerate rubber aging, icing expansion in winter can further damage the structure, and the pumping effect of the slurry under the action of power can aggravate the problem of empty suspension of the short sleeper. In addition, the track elasticity is mainly derived from rubber elastic boots, and the capacity of absorbing the vibration impact energy of the upper wheel track is relatively limited due to the small mass of the short sleeper, so that the vibration damping performance is relatively weak. Short sleeper pairs are distributed under the rails on the left side and the right side in a scattered manner, and in a curve section, the transverse force of the train can make the track gauge and the track bottom slope difficult to maintain for a long time, so that the maintenance of driving stability is not facilitated. These problems are interwoven and present challenges for long-term stable operation of existing resilient short sleeper tracks, and effective retrofit solutions are needed. Disclosure of Invention The application aims to provide a combined elastic short sleeper reconstruction method and a track structure thereof, which are used for solving the problems that the service life of the conventional elastic short sleeper rubber boot is short, the cohesiveness is poor, the geometric shape and position of the track are difficult to maintain for a long time, and improving the vibration damping performance and the operation stability. In order to achieve the above purpose, the present application provides the following technical solutions: The application provides a combined elastic short sleeper reconstruction track structure which comprises a short sleeper, an under sleeper elastic cushion plate, a sleeper side elastic limit cushion plate, quick setting elastic damping filling materials, a short sleeper geometric shape position adjusting frame and a vibration damping fastener for the short sleeper, wherein the short sleeper is arranged above the short sleeper by the vibration damping fastener, the under sleeper elastic cushion plate is arranged between the bottom of the short sleeper and a track bed and is attached to the bottom of the short sleeper, the sleeper side elastic limit cushion plate is arranged between the side surface of t