CN109338831B

CN109338831B - Ballastless track deviation rectifying method based on rope saw cutting

Info

Publication number: CN109338831B
Application number: CN201811427423.6A
Authority: CN
Inventors: 靳昊; 易忠来; 李化建; 黄法礼; 王振; 谢永江
Original assignee: Railway Engineering Research Institute of CARS
Current assignee: Railway Engineering Research Institute of CARS
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2021-08-06
Anticipated expiration: 2038-11-27
Also published as: CN109338831A

Abstract

A ballastless track deviation rectifying method based on rope saw cutting comprises the following steps: (1) determining deviation correction quantity of ballastless tracks of the deviation section, and performing bar planting and anchoring on the ballastless tracks at two ends of the deviation section; (2) drilling a rope saw operation hole on the side surface of the ballastless track; (3) cutting the ballastless track concrete by using a rope saw, removing the bonding constraint of the ballastless track, and simultaneously limiting the cut ballastless track; (4) rectifying the ballastless track to a designed value through a pushing system, and filling a cutting seam of the ballastless track fully by adopting a low-viscosity high-early-strength grouting material to recover the stability of the line; (5) and (4) carrying out bar planting and anchoring on the ballastless track in the renovation area, finely adjusting a fastener system, and recovering the smoothness of the line. The method is simple, rapid, safe and reliable, the geometric state of the ballastless track is stable in the renovation process, the running safety of the train is not affected, the method can be implemented within the time of maintaining the skylight, and the method is suitable for rapid deviation rectification of the ballastless track.

Description

Ballastless track deviation rectifying method based on rope saw cutting

Technical Field

The invention belongs to the technical field of structure defect treatment of ballastless tracks of high-speed railways, and particularly relates to a ballastless track deviation rectifying method based on rope saw cutting.

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. The ballastless track line in China is long and has large span, and when the ballastless track passes through a special section, part of ballastless tracks can deviate due to a complex geological environment, so that the smoothness of the ballastless track line is seriously influenced, and the running safety of a train is threatened.

At present, the ballastless track deviation is usually improved by adopting a mode of adjusting a fastener. The fastener adjusting method is used for adjusting ballastless track fasteners in the offset section and the two sides of the offset section within a larger range, so that the purposes of downslope and line shape optimization are achieved. But the transverse adjustment quantity of the fastener is very small, the distance between two sides of the offset section along the slope is long, the daily maintenance difficulty is large, and when the offset of the ballastless track is large, the ballastless track adjusted by the fastener cannot meet the passing requirement of high-speed driving, the speed is limited, and the normal operation of the high-speed railway is seriously influenced. The method is only a temporary treatment measure and cannot fundamentally solve the problem of ballastless track deviation.

Besides adjusting fasteners, ballastless track deviation correction mainly adopts a method of jacking and correcting deviation of ballastless tracks and a temporary support rebuilding method. The patent "a central line rectifying method for subsiding and offsetting ballastless track" (CN 106702834A) the technology for remedying the ballastless track subsiding and offsetting diseases mainly aims at the ballastless track subsiding and offsetting diseases at a roadbed, and the technical core is that after the foamed polyurethane is injected below a base plate or a supporting layer to perform grouting and lifting on the ballastless track, the rectifying of the ballastless track is realized through a side pushing device. The technology needs to lift and correct the whole ballastless track, construction has limitation, the technology is not suitable for non-settlement sections, and the lifting and correction of the ballastless track are difficult at the end thorn area part with large weight. The ballastless track deviation rectification technology core of the 'ballastless track center line rectification method for the road-base-end high-speed railway' (CN 106049193A) is that a track bed and graded broken stones are firstly jacked up through a jack or an air cushion and the like, so that friction is reduced, and then a jacking device is used for carrying out integral rectification on the ballastless track. According to the technology, the jack or the air cushion is required to be excavated and installed at the lower part of the ballastless track, the manual labor intensity is high, and the elevation change of the ballastless track after rectification is not clear. Meanwhile, the lower part of the double-block ballastless track in the tunnel is filled with inverted arch filling layer concrete, and the two treatment technologies are not suitable. The temporary support and reconstruction method is to remove the track bed plate or the track bed plate and the inverted arch concrete, perform temporary support by adopting a wood sleeper or a steel cushion beam, and then re-pour the track bed plate or the track bed plate and the inverted arch concrete according to the designed position. The method needs to be supported temporarily by a wooden sleeper or a steel backing beam for a long time, the stability and the safety of the ballastless track are poor, a track bed continuously poured by adopting fast-hardening concrete is easy to crack, the continuity of the track bed and an inverted arch filling layer which are poured by sections is poor, cracks are easy to appear on the interfaces of new and old concrete, the durability of the ballastless track structure is influenced, and the track bed plate and the inverted arch concrete are difficult to dig and remove, so that the labor intensity is high, and the construction efficiency is low.

Therefore, how to safely, quickly and effectively solve the deviation disease of the ballastless track and greatly reduce the labor intensity and the construction difficulty 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 ballastless track deviation rectifying method based on rope saw cutting.

The technical scheme is as follows: in order to achieve the purpose, the invention provides a ballastless track deviation rectifying method based on rope saw cutting. The method comprises the following steps: (1) determining deviation correction quantity of ballastless tracks of the deviation section, and performing bar planting and anchoring on the ballastless tracks at two ends of the deviation section; (2) drilling a rope saw operation hole on the side surface of the ballastless track; (3) cutting the ballastless track concrete by using a rope saw, removing the bonding constraint of the ballastless track, and simultaneously limiting the cut ballastless track; (4) rectifying the ballastless track to a designed value through a pushing system, and filling a cutting seam of the ballastless track fully by adopting a low-viscosity high-early-strength grouting material to recover the stability of the line; (5) and (4) carrying out bar planting and anchoring on the ballastless track in the renovation area, finely adjusting a fastener system, and recovering the smoothness of the line.

The anchoring length of the ballastless track steel bars at two ends of the offset section is 5-15 m, when the ballastless track steel bars at two ends of the offset section are anchored, 2-5 steel bar planting holes are arranged in each row perpendicular to the line direction, and the distance between every two adjacent rows is 0.3-1.5 m; the diameter of the wire saw operation hole is not less than 20mm, and the distance between the adjacent wire saw operation holes along the line defense line is not more than 4 m.

The rope saw cutting is one or two of horizontal cutting and vertical cutting, the horizontal cutting of the rope saw is horizontal cutting of a track bed and supporting structure concrete or supporting structure concrete, and the vertical cutting of the rope saw is one or two of vertical cutting of a ballastless track at an offset peak position and vertical cutting of a ballastless track at an offset area start-stop position.

The limiting of the cut ballastless track is that limiting devices are adopted on two sides of the ballastless track and temporary supporting devices are adopted on the lower portion of the ballastless track to limit the ballastless track transversely, vertically and longitudinally, and the temporary supporting devices comprise one or more of rubber base plates, plastic base plates, metal base plates and wood base plates.

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; a ballastless track deviation correcting device comprises a jack, a counterforce device, a force transmission device and measuring equipment.

The low-viscosity high-early-strength grouting material is one of polyurethane, epoxy resin, unsaturated resin and vinyl resin.

Has the advantages that: the ballastless track deviation rectifying method based on rope saw cutting provided by the invention has the following positive effects:

(1) the ballastless track rectification based on the rope saw cutting can be completed in the skylight time, the construction of a broken road is not needed, and the normal operation and operation of a travelling crane are not influenced;

(2) after the ballastless track concrete is cut by the rope saw to remove bonding constraint, the ballastless track can be corrected by directly transversely pushing, and the process is simple and efficient.

(4) The ballastless track rectification technology based on rope saw cutting does not affect the original ballastless track structure;

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

(6) 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;

(7) the repairing materials involved in the renovation are all special materials, the early curing speed is high, and the requirement of immediate traffic after the construction is met.

Drawings

The invention is shown in the attached drawings.

FIG. 1 is a schematic view of a wire saw hole and horizontal cut of the present invention.

Fig. 2 is a schematic view of the vertical cutting of the ballastless track of the present invention.

Fig. 3 is a schematic view of the ballastless track steel bar planting anchoring of the invention.

The reference numerals in the drawings of the present invention are as follows.

1. The steel rail comprises a steel rail 2, a sleeper 3, a ballastless track bed 4, a track bed and supporting structure concrete interface 5, supporting structure concrete 6, a rope saw operation hole 7, concrete horizontal cutting 8, concrete vertical cutting 9 and a bar planting hole.

Detailed Description

The following description of the embodiments is given by way of example and with reference to the accompanying drawings, which are given by way of illustration only and do not limit the scope of the invention.

Example 1

The method for rectifying the deviation of the ballastless track in the tunnel comprises the following steps:

(1) measuring initial data of the geometric state of the ballastless track before construction, dividing cutting units according to 1.95m, checking the transverse adjustment quantity of each sleeper position of the ballastless track, and establishing a data joint control network. The amount of design correction at each tie in the renovation section is shown in table 1.

TABLE 1 deviation correction for ballastless track design

Sleeper number	Design deviation correction	Sleeper number	Design deviation correction
				1	0	20	22.5
2	1.2	21	21.2
				3	2.6	22	20.3
4	3.8	23	18.9
				5	4.5	24	17.2
6	5.8	25	16.3
				7	6.9	26	15.1
8	8.1	27	14.2
				9	9.8	28	12.8
10	10.5	29	10.9
				11	11.6	30	9.3
12	12.4	31	8.2
				13	16.7	32	7.6
14	18.2	33	5.7
				15	19.3	34	4.3
16	21.5	35	3.2
				17	22.4	36	2.1
18	23.6	37	1.1
				19	23.1	38	0

(2) The bed boards at two ends of the renovation section are anchored by embedded steel bars, the anchoring length of the embedded steel bars is 15m, the schematic diagram of the embedded steel bar anchoring is shown in figure 3, 5 embedded steel bar holes are arranged in each row perpendicular to the line direction, and the distance between every two adjacent rows is 1.5 m.

(3) And drilling a rope saw operation hole at the interface of the ballastless track bed plate and the inverted arch filling layer, wherein the rope saw operation hole is as shown in figure 1. The diameter of the wire saw operation hole is 20mm, and the distance between the adjacent wire saw operation holes along the line direction is 1.95 m.

(4) The rope saw chain is threaded into the rope saw operation hole for horizontal cutting, each machine cuts 1.95m each time, and the track bed plate and the inverted arch filling layer are cut and separated, as shown in figure 1. After cutting, the cutting seam is temporarily supported by a base plate, and limiting devices are arranged on two sides of the ballastless track.

(5) And a rope saw is adopted to vertically cut off the track bed plate between the 18 th and 19 th sleepers at the maximum deviation position, and the vertical cutting of the track bed plate is shown in figure 2.

(6) And removing the base plate in the cutting seam, and transversely adjusting the track bed plate to a design value by adopting a transverse pushing system and matching with measuring equipment such as a total station and the like.

(7) And (4) sealing the cutting seam, installing a grouting pipe and an exhaust pipe, and pouring a low-viscosity high-early-strength grouting material.

(8) And (4) carrying out bar planting and anchoring on the ballastless track of the region to be regulated, finely adjusting a fastener system, and recovering the smoothness of the line.

Example 2

The method for rectifying the ballastless track of the roadbed and the bridge section comprises the following steps:

(1) measuring initial data of a ballastless track in a geometric state before construction, dividing cutting units according to 4m, checking the transverse adjustment amount of each sleeper position on a track bed board, and establishing a data joint control network. The design deviation correction for each tie in the renovation section is shown in table 2.

TABLE 2 deviation correction amount for ballastless track design

Sleeper number	Design deviation correction	Sleeper number	Design deviation correction
				1	0.0	20	12.7
2	0.9	21	11.8
				3	1.6	22	11.2
4	2.3	23	10.4
				5	3.6	24	9.2
6	4.9	25	8.7
				7	5.6	26	7.8
8	6.8	27	6.9
				9	7.7	28	6.0
10	8.8	29	5.5
				11	9.7	30	5.0
12	10.8	31	4.5
				13	11.5	32	3.5
14	12.7	33	2.8
				15	13.5	34	2.1
16	14.2	35	1.7
				17	15.3	36	1.1
18	14.1	37	0.4
				19	13.4	38	0

(2) The bed boards at two ends of the renovation section are anchored by embedded steel bars, the embedded steel bar anchoring length is 5m, the schematic diagram of the embedded steel bar anchoring is shown in figure 3, 2 embedded steel bar holes are arranged in each row perpendicular to the line direction, and the distance between every two adjacent rows is 0.3 m.

(3) And drilling a rope saw operation hole which transversely penetrates through the ballastless track at the concrete interface of the ballastless track bed and the supporting structure or on the supporting structure concrete, as shown in figure 1. The diameter of the wire saw operation hole is 25mm, and the distance between adjacent wire saw operation holes in the line direction is 4 m.

(4) The rope saw chain is threaded into the rope saw working hole for horizontal cutting, each machine cuts 4m each time, the ballast bed is separated from the supporting structure concrete or continuous horizontal cutting seams are formed on the supporting structure concrete, and the structure is shown in figure 1. After cutting, the cutting seam is temporarily supported by a base plate, and limiting devices are arranged on two sides of the ballastless track.

(5) The ballastless track between the 16 # sleeper and the 17 # sleeper at the maximum deviation position is vertically cut off by adopting a rope saw, or the ballastless track between the 16 # sleeper and the 17 # sleeper at the maximum deviation position and the ballastless tracks at the 1 # sleeper and the 38 # sleeper at two ends are vertically cut off, and the ballastless track is vertically cut as shown in figure 2.

Example 3

The ballastless track deviation rectifying method for the tunnel entrance discontinuous track bed comprises the following steps:

(1) measuring initial data of a ballastless track in a geometric state before construction, dividing cutting units according to 2.6m, checking the transverse adjustment amount of each sleeper position of a track bed board, and establishing a data joint control network. The amount of design correction at each tie in the remedial zone is shown in table 3.

TABLE 3 deviation correction for ballastless track design

Sleeper number	Design deviation correction	Sleeper number	Design deviation correction
				1	23.0	13	12.4
2	22.1	14	11.9
				3	21.5	15	10.8
4	20.6	16	8.6
				5	19.2	17	7.4
6	18.7	18	6.5
				7	17.3	19	4.9
8	16.2	20	3.3
				9	15.8	21	2.5
10	14.1	22	1.8
				11	13.6	23	0.6
12	13.1	24	0

(2) The track bed board in the tunnel is anchored by the embedded steel bars, the embedded steel bar anchoring length is 10m, the embedded steel bar anchoring schematic diagram is shown in figure 3, 4 embedded steel bar holes are arranged in each row perpendicular to the line direction, and the distance between every two adjacent rows is 1.3 m.

(3) And drilling a rope saw operation hole which transversely penetrates through the ballastless track at the interface of the ballastless track bed plate and the inverted arch filling layer, wherein the rope saw operation hole is as shown in figure 1. The diameter of the wire saw operation hole is 30mm, and the distance between the adjacent wire saw operation holes along the line direction is 2.6 m.

(4) The rope saw chain is threaded into the rope saw operation hole for horizontal cutting, each machine cuts 2.6m each time, and the track bed plate and the inverted arch filling layer are cut and separated, as shown in figure 1. After cutting, the cutting seam is temporarily supported by a base plate, and limiting devices are arranged on two sides of the ballastless track.

(5) And removing the base plate in the cutting seam, assuming the transverse pushing system to be at the discontinuous joint of adjacent track bed boards, installing a pressing plate with a certain area at the joint, ensuring that the track bed boards at two ends of the joint can transversely move simultaneously during pushing, and transversely adjusting the track bed boards to a design value by matching with measuring equipment such as a total station and the like during pushing.

(7) And sealing the cutting seam, installing a grouting pipe and an exhaust pipe, pouring low-viscosity high-early-strength grouting material, and sealing the seam again by adopting caulking material.

Claims

1. A ballastless track deviation rectifying method based on rope saw cutting is used for transverse deviation rectifying of ballastless tracks and is characterized by comprising the following steps: (1) determining deviation correction quantity of ballastless tracks of the deviation section, and performing bar planting and anchoring on the ballastless tracks at two ends of the deviation section; (2) determining the length and the number of the wire saw cutting units according to the deviation correcting length, and drilling wire saw operation holes at two ends of the cutting units, wherein the diameter of each operation hole is not less than 20 mm; (3) the ballastless track is continuously cut in situ by adopting the rope saw pressing unit, the bonding constraint of the ballastless track in the area to be rectified is completely removed under the condition of ensuring that the geometric linear shape of the ballastless track is not changed, the in-situ cutting of the rope saw is to horizontally cut the bonding interface of the track bed and the supporting structure concrete or the supporting structure concrete, remove the bonding constraint of the lower part of the ballastless track, and a supporting backing plate is inserted into the cutting seam to ensure that the elevation of the track is not changed during and after the cutting, vertically cutting off the ballastless track at the offset peak position and the offset section starting and stopping position, removing the longitudinal bonding constraint of the ballastless track, and the two sides of the ballastless track are provided with the limiting devices to ensure that the transverse position of the track is not changed in the cutting process and after the cutting, wherein the supporting base plate is one or more of a rubber base plate, a plastic base plate, a metal base plate and a wood base plate; (4) rectifying the ballastless track to a design value through a pushing system, filling a cutting seam of the ballastless track fully by adopting a low-viscosity high-early-strength grouting material, and recovering the stability of the line, wherein the low-viscosity high-early-strength grouting material is one of polyurethane, epoxy resin, unsaturated resin and vinyl resin; (5) and (4) carrying out bar planting and anchoring on the ballastless track of the offset section, finely adjusting a fastener system, and recovering the smoothness of the line.

2. The ballastless track deviation rectifying method based on rope saw cutting as claimed in claim 1, characterized in that: the ballastless track steel bar planting anchoring length of two ends of the offset section is 5-15 m, when the offset section and the two ends of the offset section are anchored, 2-5 steel bar planting holes are arranged in each row perpendicular to the line direction, and the distance between every two adjacent rows is 0.3-1.5 m.

3. The ballastless track deviation rectifying method based on rope saw cutting as claimed in claim 1, characterized in that: the rope saw cutting device consists of a power device with the chain winding and unwinding functions, a numerical control system, a guide frame, a guide wheel, a diamond chain and a protection device.

4. The ballastless track deviation rectifying method based on rope saw cutting as claimed in claim 1, characterized in that: a ballastless track deviation correcting device comprises a jack, a counterforce device, a force transmission device and measuring equipment.

5. The ballastless track deviation rectifying method based on rope saw cutting as claimed in claim 1, characterized in that: the train can safely pass through the ballastless track that the support backing plate and the part or whole that adopt stop device fixed in both sides are accomplished the rope saw cutting of stuffing into in lower part cutting seam.

6. The ballastless track deviation rectifying method based on rope saw cutting as claimed in claim 1, characterized in that: and (4) remedying the ballastless track deviation diseases with different lengths in the skylight time.

7. The ballastless track deviation rectifying method based on rope saw cutting as claimed in claim 1, characterized in that: the method comprises three independent processes of rope saw cutting of the ballastless track, deviation correction of the ballastless track and cutting seam grouting, and can be implemented in different skylights respectively, wherein the rope saw cutting of the ballastless track and the cutting seam grouting are completed within the time of one skylight.

8. The ballastless track deviation rectifying method based on rope saw cutting as claimed in claim 1, characterized in that: the method is suitable for ballastless track deviation correction of roadbeds, bridges and tunnels.