阅读说明：本技术 一种无砟道床结构部件更换方法 (Ballastless track bed structure part replacement method ) 是由 易忠来 靳昊 李化建 温浩 谢永江 黄法礼 王振 袁政成 袁静怡 于 2020-07-14 设计创作，主要内容包括：一种无砟道床结构部件更换方法,包括以下步骤：(1)无砟道床加固；(2)在无砟道床结构部件伤损部位钻取绳锯作业孔；(2)采用绳锯将无砟道床结构部件伤损部位切割成可移除的独立单元；(3)将切割后的结构部件移除；(4)无砟道床临时限位；(5)临时限位拆除；(6)已移除结构部件位置的重新浇筑；(7)线路精调。该方法简单快捷,安全可靠,整治过程中无砟轨道几何状态稳定,可在天窗时间内对无砟轨道支承层、水泥乳化沥青砂浆层及CRTSⅢ型轨道板与自密实混凝土粘结结构进行更换作业,不影响列车正常运营。(A ballastless track bed structure part replacing method comprises the following steps: (1) reinforcing a ballastless track bed; (2) drilling a rope saw operation hole at the damaged part of the ballastless track bed structural component; (2) cutting the damaged part of the ballastless track bed structure component into a removable independent unit by adopting a rope saw; (3) removing the cut structural component; (4) temporarily limiting the ballastless track bed; (5) temporarily limiting and dismantling; (6) a pour of the removed structural component location; (7) and (5) fine adjustment of a line. The method is simple, rapid, safe and reliable, the geometric state of the ballastless track is stable in the renovation process, the replacement operation can be carried out on the ballastless track supporting layer, the cement emulsified asphalt mortar layer and the CRTS III type track plate and the self-compacting concrete bonding structure within the skylight time, and the normal operation of the train is not influenced.)

1. A ballastless track bed structure part replacing method is characterized by comprising the following steps: (1) reinforcing a ballastless track bed; (2) drilling a rope saw operation hole at the damaged part of the ballastless track bed structural component; (2) cutting the damaged part of the ballastless track bed structure component into a removable independent unit by adopting a rope saw; (3) removing the cut structural component; (4) temporarily limiting the ballastless track bed; (5) temporarily limiting and dismantling; (6) a pour of the removed structural component location; (7) and (5) fine adjustment of a line.

2. The ballastless track bed structural component replacement method of claim 1, wherein: and the ballastless track bed is reinforced by planting bars and anchoring the ballastless track beds at two ends of the area to be replaced.

3. The ballastless track bed structural component replacement method of claim 1, wherein: the rope saw operation hole is drilled from the side face of the ballastless track bed, and the hole diameter is not less than 20 mm.

4. The ballastless track bed structural component replacement method of claim 1, wherein: the rope saw cutting is horizontal cutting parallel to the line direction and vertical cutting perpendicular to the line direction.

5. The ballastless track bed structural component replacement method of claim 1, wherein: the rope saw cutting device is composed of a power device with a chain winding and unwinding function, a numerical control system, a guide frame, a guide wheel, a diamond chain and a protection device.

6. The ballastless track bed structural component replacement method of claim 1, wherein: the temporary limiting of the ballastless track bed is realized by installing temporary reinforcing and supporting devices at two sides and the lower part of the ballastless track bed and limiting the ballastless track bed transversely, vertically and longitudinally.

7. The ballastless track bed structural component replacement method of claim 1, wherein: and the cut structural component is laterally removed from the ballastless track bed, and the removing device adopts one or two of a traction device and a pushing device.

8. The ballastless track bed structural component replacement method of claim 1, wherein: the structural component pouring material is one of high-molecular modified concrete or mortar with quick hardening and self-filling functions.

Technical Field

The invention belongs to the technical field of disease treatment of a ballastless track structure of a high-speed railway, and particularly relates to a method for replacing a ballastless track bed structure component.

Background

The high-speed railway in China mainly adopts a ballastless track bed, wherein a supporting layer is a key force transmission bearing structure of the ballastless track bed. In a special environment area, the ballastless track bed supporting layer can have the defects of slab staggering cracking, integral pulverization and the like caused by high temperature, freeze thawing and the like, the stability of a ballastless track and the running safety of a train are seriously influenced, and the concrete of the supporting layer in a damaged area needs to be replaced urgently.

The supporting layer is arranged at the lower part of the ballastless track bed structure and is covered by track slabs, track bed slabs and the like, so that the supporting concrete in a damaged area is difficult to replace within a limited skylight time. At present, the method mainly adopts the method of steel rail removal, track plate and filling layer removal, steel backing beam temporary support, bed plate/supporting layer concrete chiseling, bed plate/supporting layer vertical mould pouring, steel backing beam removal, track plate resetting, filling layer vertical mould pouring, steel rail resetting and fine adjustment to replace the concrete of the ballastless track bed damage supporting layer by using skylight time. The method needs large-scale tools such as a rail car flat plate, a rail crane, a gantry crane and a steel pad beam, and is provided with a large number of constructors, so that the construction cost is high, and the organization difficulty is high. Moreover, during the replacement of the supporting layer, the constructions of steel rail removal, rail plate removal, temporary steel-cushion beam supporting and the like are required, the influence on the rail structure is large, the stability and the safety of the temporary supporting structure are low, and the driving safety of the train is influenced. Meanwhile, the method has low construction efficiency, cannot be applied in a large scale, and cannot replace the continuous damaged supporting layer.

Meanwhile, the cement emulsified asphalt mortar of the plate-type ballastless track is usually replaced by a method of lifting or stripping the steel rail, jacking the track plate, chiseling the cement emulsified asphalt mortar under the plate, recovering the steel rail and the track plate in situ and pouring the cement emulsified asphalt mortar again. The III templates of CRTS and self-compaction concrete pass through the door type reinforcing bar and link to each other, when track board or self-compaction concrete damage must be changed, need to change its bonding is whole. The CRTS III type plate and the self-compacting concrete bonding structure are high in overall thickness and weight, limited by the height of a contact net, large in removal difficulty and low in efficiency of a track crane or a gantry crane, and high in replacement risk in a skylight period.

Therefore, how to realize safe, quick and efficient replacement of the ballastless track bed structure component in the skylight time and greatly improve the construction efficiency is a problem to be solved urgently.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to overcome the defects of the prior art and provides a method for replacing a ballastless track bed structure component.

The technical scheme is as follows: in order to achieve the aim, the invention provides a quick replacement method for a ballastless track bed structure component. The method comprises the following steps: (1) reinforcing a ballastless track bed; (2) drilling a rope saw operation hole at the damaged part of the ballastless track bed structural component; (2) cutting the damaged part of the ballastless track bed structure component into a removable independent unit by adopting a rope saw; (3) removing the cut structural component; (4) temporarily limiting the ballastless track bed; (5) temporarily limiting and dismantling; (6) a pour of the removed structural component location; (7) and (5) fine adjustment of a line.

The ballastless track bed reinforcement is to carry out bar planting and anchoring on the ballastless track beds at two ends of the area to be replaced; drilling a rope saw operation hole from the side surface of the ballastless track bed, wherein the hole diameter is not less than 20 mm; the wire saw cutting is a horizontal cutting parallel to the line direction and a vertical cutting perpendicular to the line direction.

The rope saw cutting device consists of a power device with a chain winding and unwinding function, a numerical control system, a guide frame, a guide wheel, a diamond chain and a protection device; and laterally removing the cut structural component from the ballastless track bed, wherein the removing device adopts one or two of a traction device and a pushing device. The temporary limiting of the ballastless track bed is realized by installing temporary reinforcing and supporting devices at two sides and the lower part of the ballastless track bed and limiting the ballastless track bed transversely, vertically and longitudinally.

The structural component pouring material is one of high-molecular modified concrete or mortar with quick hardening and self-filling functions.

Has the advantages that: the quick replacement method for the ballastless track bed structural component provided by the invention has the following positive effects:

(1) the construction can be completed within the skylight time, the construction of a broken channel is not needed, the normal operation and the operation of a travelling crane are not influenced, and the construction process is simple and efficient;

(2) the original ballastless track structure is not influenced;

(3) the construction process is simple, the tool is light and convenient, the carrying is convenient, the construction flexibility and the construction efficiency are high, and the method is suitable for large-scale construction;

(4) the automatic degree of the machine tool is high, the labor intensity of workers is low, the controllability of the construction process is strong, the construction can be completed within the skylight time, and the risk of driving along points is avoided;

(5) multiple safety measures such as limiting and temporary supporting are adopted in the renovation process, so that the stable structure of the ballastless track is ensured;

(6) the pouring material is polymer modified concrete and mortar, the workability and the bonding strength are good, the cracking resistance is excellent, the mechanical strength is high within 2h, and the requirement of immediate traffic after construction is met.

Detailed Description

The following examples are given to illustrate specific embodiments of the present invention, and are not intended to limit the scope of the present invention.