Unlock instant, AI-driven research and patent intelligence for your innovation.

Anti-cracking structure and implementation method of asphalt concrete layer under expansion joint of base plate

A technology for asphalt concrete and an implementation method, which is applied to ballast layers, roads, buildings, etc., can solve the problems of the asphalt concrete layer being weak in adapting to low temperature deformation, reducing the temperature strain of the asphalt concrete layer, etc., so as to improve the service performance and reduce the Frictional adhesion, effect of preventing thermal cracks

Active Publication Date: 2020-05-12
SOUTHEAST UNIV +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides an anti-crack structure and implementation method for the asphalt concrete layer under the expansion joint of the base plate, which is suitable for the ballastless track structure with a full-section asphalt concrete layer, and can effectively solve the problem of temperature changes in low temperature environments. , because the asphalt concrete layer has weak ability to adapt to low temperature deformation, under the frictional bonding between the base plate and the asphalt concrete layer, the stress concentration phenomenon of the longitudinal continuous asphalt concrete layer at the expansion joint of the base plate can effectively reduce the problem of asphalt concrete The temperature strain of the layer prevents the generation of asphalt concrete temperature cracks, and has the advantages of easy construction control and maintenance-free. It is a new structural type that can improve the service performance of the asphalt concrete layer.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Anti-cracking structure and implementation method of asphalt concrete layer under expansion joint of base plate
  • Anti-cracking structure and implementation method of asphalt concrete layer under expansion joint of base plate
  • Anti-cracking structure and implementation method of asphalt concrete layer under expansion joint of base plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like figure 1 , figure 2 , The isolation buffer layer 1 is a rubber cushion, and the shear protection layer 2 is a thin aluminum plate. The specific layout of the structure is as follows:

[0034] First of all, after the construction of the asphalt concrete layer is completed, the length and width range of the base plate and the position of the expansion joint are determined according to the lofting, and the surface of the asphalt concrete layer within 2m on both sides of the expansion joint of the base plate is cleaned. For sharp corners and pits, the cleaning width should be larger than the width of the base plate on both sides, about 15cm.

[0035] Then, the laying of the isolation buffer layer 1 is carried out. The material of the isolation buffer layer 1 is a rubber pad. The thickness is 3-5mm. The isolation buffer layer 1 is laid longitudinally and symmetrically about the expansion joints of the base plate, and the laying length is Lm on the left and right s...

Embodiment 2

[0039] like figure 2 , image 3 , The isolation buffer layer 1 is composed of a buffer layer 3 and an isolation layer 4, and its materials correspond to SBS modified bitumen waterproof membrane and PE film respectively, and the shear protection layer 2 is a thin aluminum plate. The specific layout of the structure is as follows:

[0040] First of all, after the construction of the asphalt concrete layer is completed, the length and width range of the base plate and the position of the expansion joint are determined according to the stakeout, and the surface of the asphalt concrete layer within 2m on both sides of the expansion joint of the base plate is cleaned. For sharp corners and pits, the cleaning width should be larger than the width of the base plate on both sides, about 15cm.

[0041]Secondly, the buffer layer 3 is laid, and its material is SBS modified asphalt waterproof membrane, and the hot-melt method is used for construction, because the hot-melt method can ens...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an anti-cracking structure and an implementation method of an asphalt concrete layer under an expansion joint of a base plate. An isolation buffer layer is sequentially arranged from a top surface of the asphalt concrete layer near the expansion joint of the base plate and a contact part with the asphalt concrete layer, and a protective layer is shearing. The isolation buffer layer reduces the local adhesion and friction between the asphalt concrete layer and the base plate, and at the same time buffers the shrinkage deformation of the upper base plate. The shearing protective layer protects the isolation buffer layer at the expansion joint of the base plate locally and prevents the base plate from shearing damage to the isolation buffer layer. The structure construction provided by the invention is easy to control, can effectively reduce the cracks in the asphalt concrete layer caused by the temperature change and the temperature gradient of the upper track structure, and further improve the service performance of the asphalt concrete layer.

Description

technical field [0001] The invention relates to the technical field of railway transportation engineering, and more specifically relates to a structure and an implementation method between a base plate of a novel ballastless track structure and an under-line asphalt concrete layer. Background technique [0002] Setting a layer of dense asphalt concrete layer with a thickness of about 5-10cm between the base plate of the ballastless track and the surface of the subgrade bed is a new waterproof sealing scheme for the ballastless track structure of the high-speed railway. Compared with the traditional fiber concrete waterproof sealing scheme, this structure has the advantages of better waterproof sealing effect, simple construction and easy maintenance. In this new waterproof structure, the asphalt concrete layer is formed by continuous paving and rolling along the longitudinal direction by mechanized operation, and the longitudinal continuous structure has the same width as th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E01B1/00
CPCE01B1/002E01B1/007
Inventor 陈先华梁绎龙叶阳升韩自力蔡德钩张千里周杰符庆宏闫宏业徐刚杨军石越峰李泰丰张新冈
Owner SOUTHEAST UNIV