阅读说明：本技术 一种无砟道床隐蔽结构更换方法 (Method for replacing ballastless track bed hidden structure ) 是由 靳昊 易忠来 李化建 黄法礼 谢永江 杨怀志 温浩 王振 袁政成 袁静怡 于 2020-07-14 设计创作，主要内容包括：一种无砟道床隐蔽结构更换方法,包括以下步骤：(1)无砟道床加固；(2)采用水力破除设备将无砟道床隐蔽结构破碎移除；(3)无砟道床临时限位；(4)临时限位拆除；(5)隐蔽结构重新浇筑；(6)线路精调。该方法安全性高、施工可控性佳,不损伤结构内部钢筋,对无砟道床结构影响小,可在维修天窗时间内对板式及双块式无砟道床充填层、底座板、支承层等隐蔽结构进行更换作业,不影响列车正常运营。(A method for replacing a hidden structure of a ballastless track bed comprises the following steps: (1) reinforcing a ballastless track bed; (2) crushing and removing the ballastless track bed hidden structure by adopting hydraulic breaking equipment; (3) temporarily limiting the ballastless track bed; (4) temporarily limiting and dismantling; (5) pouring the hidden structure again; (6) and (5) fine adjustment of a line. The method has high safety and good construction controllability, does not damage the reinforcing steel bars in the structure, has small influence on the structure of the ballastless track bed, can replace hidden structures such as a plate type and a double-block ballastless track bed filling layer, a bed plate, a supporting layer and the like in the time of maintaining the skylight, and does not influence the normal operation of the train.)

1. A method for replacing a hidden structure of a ballastless track bed is characterized by comprising the following steps: (1) reinforcing a ballastless track bed; (2) crushing and removing the ballastless track bed hidden structure by adopting hydraulic breaking equipment; (3) temporarily limiting the ballastless track bed; (4) temporarily limiting and dismantling; (5) pouring the hidden structure again; (6) and (5) fine adjustment of a line.

2. The ballastless track bed hidden structure replacing method according to claim 1, characterized in that: 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 hidden structure replacing method according to claim 1, characterized in that: the hydraulic breaking equipment can break concrete or mortar of the hidden structure of the ballastless track bed from the lateral direction of the ballastless track bed.

4. The ballastless track bed hidden structure replacing method according to claim 1, characterized in that: the hydraulic breaking equipment comprises a power supply device, a control system, a high-pressure water pressurizing device, a high-pressure water conveying pipe, a high-pressure water gun guide device, a drainage device, a protection device and a high-pressure water safety device, wherein the high-pressure water gun guide device can control the high-pressure water gun to move in a three-dimensional mode, and the protection device can completely seal high-pressure water, concrete and mortar crumbles.

5. The ballastless track bed hidden structure replacing method according to claim 1, characterized in that: the hydraulic breaking equipment can break concrete and mortar at different ballastless track bed structure parts and different strength grades by adjusting the water pressure and the water yield.

6. The ballastless track bed hidden structure replacing method according to claim 1, characterized in that: 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 hidden structure replacing method according to claim 1, characterized in that: the 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 hidden structure.

Background

The ballastless track structure has the characteristics of small deformation, high reliability, strong bearing capacity, small daily maintenance amount, long service life and the like, and the high-speed railway in China mainly adopts the ballastless track structure. Under the influence of long-term dynamic load, temperature force, special climatic environment and the like of a train, damage can occur to ballastless track bed filling layer mortar, filling layer concrete, base plate post-cast strip concrete, supporting layer concrete, narrow seam concrete and the like, and when the damage is serious, the stability and durability of a ballastless track structure can be reduced, and the ballastless track needs to be replaced in time.

Aiming at the problems, the invention provides a rapid replacement technology for a key structure of a ballastless track bed by iron construction of a railway academy of iron department, and replacement is carried out by adopting a 'plate uncovering method' for filling layer mortar, a base plate and a supporting layer, wherein the filling layer mortar replacement technology comprises the steps of steel rail removal, lifting or pulling away, rail plate removal or jacking, filling layer mortar chiseling, rail plate resetting, filling layer formwork erection and pouring again, steel rail resetting and fine adjustment; the replacement process of the base plate/the supporting layer mainly comprises the steps of steel rail removal, track plate and filling layer removal, temporary supporting of the steel backing beam, concrete chiseling of the base plate/the supporting layer, formwork erecting and pouring of the base plate/the supporting layer, steel backing beam removal, track plate resetting, formwork erecting and pouring of the filling layer, steel rail resetting and fine adjustment. The method needs large-scale tools such as a rail car flat plate, a rail crane, a gantry crane, a steel pad beam, a synchronous jacking device and the like, 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 structure replacement, the steel rail removal, the track slab removal, the temporary steel pad beam support and other constructions need to be carried out, the influence on the track structure is large, the stability and the safety of the temporary support structure are low, and the train running safety is influenced. Meanwhile, the method has low construction efficiency and cannot be applied in a large scale.

In order to improve the replacement construction efficiency and safety of the support layer of the ballastless track, the iron construction of iron institute of iron department invents a method for replacing the support layer of the ballastless track bed based on rope saw cutting, and the efficient and safe replacement of the support layer is realized. However, the wire saw cuts the reinforcing bars, and therefore, this method has a limitation, and is not suitable for replacement of filling layer concrete, foundation plate concrete, and foundation plate post-cast strip concrete containing reinforcing bars inside.

Disclosure of Invention

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

The technical scheme is as follows: in order to achieve the aim, the invention provides a ballastless track bed hidden structure replacing method based on hydraulic breaking. The method comprises the following steps: (1) reinforcing a ballastless track bed; (2) crushing and removing the ballastless track bed hidden structure by adopting hydraulic breaking equipment; (3) temporarily limiting the ballastless track bed; (4) temporarily limiting and dismantling; (5) pouring the hidden structure again; (6) 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; the hydraulic breaking equipment can break concrete or mortar of the hidden structure of the ballastless track bed from the lateral direction of the ballastless track bed.

The hydraulic breaking equipment comprises a power supply device, a control system, a high-pressure water pressurizing device, a high-pressure water conveying pipe, a high-pressure water gun guide device, a drainage device, a protection device and a high-pressure water safety device, wherein the high-pressure water gun guide device can control the high-pressure water gun to move in a three-dimensional mode, and the protection device can completely seal high-pressure water, concrete and mortar crumbles.

The hydraulic breaking equipment can break concrete and mortar at different ballastless track bed structure parts and different strength grades by adjusting the water pressure and the water yield; 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 pouring material is one of high-molecular modified concrete or mortar with quick hardening and self-filling functions.

Has the advantages that: the method for replacing the ballastless track bed hidden structure 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 method is not damaged to the reinforcing steel bars, and is suitable for replacing the hidden structure of the ballastless track with or without the reinforcing steel bars inside;

(4) the high-pressure water can be adjusted according to the strength of the broken concrete and mortar, and is controlled by combining a high-pressure water gun guide device, so that the non-replacement structure is not damaged;

(5) the construction process is simple, only the high-pressure water gun and the high-pressure water gun guiding device need to be carried to the site for construction, large devices such as a power supply device and a high-pressure water pressurizing device do not need to be carried, and the device can be arranged outside a line through a vehicle, so that the construction flexibility and the construction efficiency are high, and the device is suitable for large-scale replacement of a hidden structure of a ballastless track bed;

(6) 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;

(7) multiple safety measures such as limiting and temporary supporting are adopted in the replacement process, the stable structure of the ballastless track is ensured, the replacement area can be totally closed by adopting a protection device, and high-pressure water and debris are prevented from hurting people and equipment;

(8) the pouring material has good fluidity, can quickly pour the hidden part of the ballastless track bed fully, has high mechanical strength for 2 hours, and meets the requirement of immediate traffic after construction.

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.