CN209975279U

CN209975279U - Settlement adjustment structure suitable for CRTS II type plate ballastless track

Info

Publication number: CN209975279U
Application number: CN201920523424.4U
Authority: CN
Inventors: 孙立; 王森荣; 林超; 朱应娟; 宋国亮; 谭社会
Original assignee: China Railway Siyuan Survey and Design Group Co Ltd
Current assignee: China Railway Siyuan Survey and Design Group Co Ltd
Priority date: 2019-04-17
Filing date: 2019-04-17
Publication date: 2020-01-21
Anticipated expiration: 2029-04-17

Abstract

The utility model discloses a subside adjustment structure suitable for II plate-type ballastless tracks of CRTS belongs to track maintenance and overhaul technical field, it is through the II type track boards of CRTS that will subside the district correspond more change for III type track boards of CRTS to the isolation layer and the self-compaction concrete layer that correspond and set up the subside district, the subside district track board has effectively been realized indulging the transformation of even structure system to the unit structure system, the ballastless track settlement adjustment of subside district has not only been realized, still provide convenience for the adjustment of track board when the follow-up secondary that appears subsides. The utility model discloses a subside adjustment structure, its simple structure, it is convenient to be under construction, can effectively realize subsiding the setting of adjustment structure in the time of night skylight, can also guarantee the normal operation of circuit on daytime during the renovation simultaneously, has effectively promoted the efficiency that ballastless track subsides the adjustment, has reduced ballastless track and has subsided the cost of adjustment, has reduced ballastless track and has subsided the influence of adjustment to circuit normal operating, has better application prospect and spreading value.

Description

Settlement adjustment structure suitable for CRTS II type plate ballastless track

Technical Field

The utility model belongs to the technical field of the track maintenance overhauls, concretely relates to subside adjustment structure suitable for CRTS II template type ballastless track.

Background

With the continuous development of economy and the continuous acceleration of urbanization process in China, the rail transit industry in China is rapidly developed, and the convenience of people in going out and the rapidity of freight transportation are remarkably improved.

In the field of rail traffic, ballastless tracks are widely applied, and according to different connection systems, the existing ballastless track structure mainly comprises three types, namely a CRTS I type plate ballastless track, a CRTS II type plate ballastless track and a CRTS III type plate ballastless track, and the connection modes of the three ballastless track connection modes are different and have respective advantages and disadvantages. The CRTS II type slab ballastless track generally adopts a longitudinal connection structure system, namely adjacent track slabs are correspondingly connected through reinforcing steel bars, and concrete is poured at the connection position, so that the ballastless track has the advantages of good smoothness and small deformation through mutual restriction of the adjacent track slabs; however, the arrangement form of the CRTS ii slab ballastless track also causes certain defects in the application process, which mainly appear as follows: once the lower foundation of a certain section of CRTS II type plate ballastless track generates structural deformation such as large settlement or deviation, the normal use of the track can be influenced; moreover, the CRTS II type slab ballastless track adopts a longitudinal connection structure system, so the improvement is difficult.

In general, for local settlement of a CRTS ii slab ballastless track, a conventional method is to remove a mortar layer below a track slab and then add a mortar layer with a corresponding thickness to ensure that the track slab at a settlement position can maintain continuity with the track slab in an unsettled area. Although the method can realize the settlement adjustment of the CRTS II type slab ballastless track to a certain extent, the method is usually only suitable for the track height adjustment of an area with small settlement amount, and for an area with large settlement height, the mortar layer with large thickness cannot fully meet the stress requirement of the ballastless track and does not meet the requirement of the setting specification; moreover, once the adjusted ballastless track has subsequent settlement, the adjusting process is repeated, the process is complicated, the adjusting period is long, the adjusting workload is large, and the range of the track slab involved in adjustment is large. Meanwhile, the mortar layer is chiseled for many times, so that the existing track slab is likely to be damaged, the existing track slab cannot be normally used in serious cases, the use and maintenance cost of the ballastless track is increased, and the application limitation is large.

SUMMERY OF THE UTILITY MODEL

The more than prior art defect or improve in the demand one or more, the utility model provides a subside adjustment structure suitable for CRTS II type plate ballastless track, wherein correspond through the CRTS II type track board with the settlement zone and change for the III type track boards of CRTS, and correspond isolation layer and the self-compaction concrete layer that sets up the settlement zone, can effectively realize the settlement adjustment of ballastless track in the settlement zone, and the adjustment of orbital secondary settlement when the secondary subsides appears in the follow-up provides convenience, the work load of ballastless track settlement adjustment has effectively been reduced, the cycle of track adjustment has been shortened, the cost of track settlement adjustment has been practiced thrift.

In order to achieve the purpose, the utility model provides a settlement adjusting structure suitable for a CRTS II type slab ballastless track, which is characterized in that,

the self-compacting concrete sedimentation tank comprises a plurality of first track units arranged in a sedimentation area, wherein the first track units are correspondingly arranged on a base plate of the sedimentation area, namely the first base plate subjected to sedimentation, and comprise a first track plate, a self-compacting concrete layer and an isolating layer which are sequentially arranged from top to bottom; and is

The first base plate is vertically arranged on the first rail unit, and the first base plate is vertically arranged on the first rail unit; the first limiting bosses can be arranged between two adjacent first track plates for limiting and fixing the two adjacent first track plates, the second limiting bosses are arranged at two ends of the settlement zone along the longitudinal direction and correspondingly arranged between the first track plates of the settlement zone and the end parts of the second track plates of the non-settlement zone, and the arc wall surfaces of the second limiting bosses can be matched with the arc grooves corresponding to the end parts of the first track plates so as to limit and fix the first track plates at two ends of the settlement zone; and then, the settlement adjustment of the CRTS II type slab ballastless track can be correspondingly realized by changing the thickness of the self-compacting concrete layer.

As a further improvement of the utility model, first track unit is a plurality of along vertically setting gradually, promptly spacing boss includes that a pair of branch locates the settlement zone both ends spacing boss of second and at least one correspond and set up two between the spacing boss of second first spacing boss.

As a further improvement of the present invention, the top of the limiting boss protrudes from the top surface of the first track plate.

As a further improvement of the utility model, the top of the limit boss protrudes from the top surface of the first track plate and is 50mm high.

As a further improvement of the utility model, the undeposited area with the settlement area juncture second track board tip is provided with the reinforcement subassembly, the reinforcement subassembly includes a plurality of anchor reinforcing bars along the vertical setting, the bottom of anchor reinforcing bar is fixed on the bed plate of undeposited area, and its top with second track board fixed connection.

As a further improvement of the utility model, the isolation layer is a geotextile with a certain thickness.

As a further improvement of the present invention, the limiting boss is in a gap with a certain width between the first track plates, and resin is poured into the gap.

As the utility model discloses a further improvement, correspond pouring of resin is in first track board with it fills the bag to correspond to be provided with the resin between the spacing boss, the resin fills the bag and levels the bonding and is in first track board with on the lateral wall of spacing boss.

As a further improvement of the utility model, corresponding each the foam side baffle and the protection pad are installed to spacing boss in the crack between two adjacent track boards.

As a further improvement of the present invention, the length of the first track plate is equal to the length of the second track plate.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect:

(1) the utility model is suitable for the settlement adjusting structure of CRTS II type slab ballastless tracks, by correspondingly replacing the CRTS II type track plate in the settling zone with a CRTS III type track plate, the separation layer and the self-compacting concrete layer of the subsidence area are correspondingly arranged, the conversion from the longitudinal connection structure system of the track slab of the subsidence area to the unit structure system is effectively realized, and then the thickness of the self-compacting concrete layer is correspondingly adjusted, can accurately realize the settlement adjustment of the ballastless track in the settlement area, provides convenience for the adjustment of the track slab when the subsequent secondary settlement occurs, and once the secondary settlement occurs, due to the arrangement of the isolation layer, only the first track plate needs to be correspondingly lifted, and due to the unitized track structure, the adjustment can be performed on a single track plate during the adjustment, so that the settlement adjustment cost is greatly saved, the settlement adjustment period of the track is shortened, and the influence on the track operation caused by the settlement adjustment of the ballastless track is reduced;

(2) the utility model discloses a subside adjustment structure suitable for CRTS II type plate ballastless track, the settlement adjustment in its settlement zone is accomplished through the corresponding construction of a plurality of construction unit, the length of every construction unit is the length of the first track board of corresponding number and, for example, the length of two first track boards with, and set up corresponding transition sleeper through the construction that corresponds each construction unit, can effectively adapt to the operation process on line daytime, the construction of construction unit in the time of night track skylight and the interim recovery of daytime track are passed, effectively reduced because of ballastless track subsides the influence of adjustment to the normal operation of line, the train scheduling cost in the maintenance process of ballastless track is reduced, the economic nature and the stability of ballastless track operation have been promoted;

(3) the utility model discloses a settlement adjustment structure suitable for CRTS II template ballastless track, it is through setting up the first spacing boss that is columniform and the second spacing boss that is semi-cylindrical, the spacing and the fixing of first track slab tip have effectively been realized, and through the elevation of preferred setting spacing boss, make first track slab and spacing boss correspond the back of matching, the top surface of first track slab can be stretched out at the top of spacing boss, this provides convenience for the secondary settlement when secondary settlement appears in the follow-up, the cycle of secondary adjustment has been shortened, the work load of secondary adjustment has been reduced;

(4) the utility model discloses a subside adjustment structure suitable for II plate-type ballastless tracks of CRTS, a structure is simple, it is convenient to be under construction, can effectively realize II plate-type ballastless tracks of CRTS's settlement adjustment, realize subsiding the interim current of adjustment in-process circuit, effectively promoted ballastless track settlement adjustment's efficiency, reduced ballastless track settlement adjustment's cost, reduced ballastless track settlement adjustment and to the influence of circuit normal operating daytime, better application prospect and spreading value have.

Drawings

Fig. 1 is a schematic diagram of a settlement regulation structure suitable for a CRTS ii slab ballastless track in an embodiment of the present invention;

FIG. 2 is a partial top view of the butt joint between two CRTS III track boards in the embodiment of the present invention;

FIG. 3 is a partial longitudinal sectional view of the butt joint between two CRTS III track boards according to the embodiment of the present invention;

FIG. 4 is a partial cross-sectional view taken at A-A when two CRTS III track boards are mated in an embodiment of the present invention;

FIG. 5 is a top view of the local structure of the butt joint between the subsidence area CRTS III track board and the undeposition area CRTS II track board;

FIG. 6 is a longitudinal sectional view showing a partial structure of a butt joint portion when a subsidence area CRTS III type track board is matched with an unsettled area CRTS II type track board according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of the embodiment of the present invention showing the partial structure at the position B-B when the subsidence area CRTS III type track board is matched with the unsettled area CRTS II type track board;

in all the figures, the same reference numerals denote the same features, in particular: 1. a first track unit 101, a first track plate 102, a self-compacting concrete layer 103, an isolation layer 104, a grouting hole 105, and a hoisting sleeve; 2. a second track unit, 201, a second track plate, 202, a mortar layer; 3. the limiting boss is 301, the first limiting boss is 302, and the second limiting boss is 302; 4. base plate, 5. steel rail.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The utility model discloses be applicable to the settlement adjustment structure of CRTS II type plate ballastless track in the preferred embodiment is based on the III type track boards of CRTS and correspond and propose, adjusts the limit structure of the III type track boards of CRTS to the board end by the board end simultaneously, uses circular boss spacing, and its structure schematic diagram after setting up is shown in fig. 1. In the figure, the two ends in the longitudinal direction (the rail running direction) are non-settlement areas, the middle is a settlement area, the non-settlement areas at the two ends are respectively provided with a second rail unit 2, the settlement area at the middle is sequentially provided with a plurality of first rail units 1 in the longitudinal direction, and the adjacent first rail units 1 and second rail units 2 are correspondingly limited by limiting bosses 3.

Specifically, the first track unit 1, the second track unit 2 and the limiting boss 3 are respectively arranged on a base plate 4 arranged along the longitudinal direction, and the first track unit 1 comprises a first track plate 101, a self-compacting concrete layer 102 and an isolating layer 103 which are sequentially arranged on the base plate 4 from top to bottom; the second track unit 2 includes a second track plate 201 and a mortar layer sequentially disposed on the base plate 4 from top to bottom.

Specifically, the first track slab 101 is a CRTS iii-type track slab, and the second track slab 201 is a CRTS ii-type track slab, in the preferred embodiment, the second track slab 201 forms a longitudinal connection structure by corresponding connection of slab ends, and the first track slab 101 in the preferred embodiment has a structure as shown in fig. 1, and circular arc grooves are respectively formed in the middle parts of two ends of the first track slab, so that after the two first track slabs 101 are correspondingly matched in the longitudinal direction, the circular arc grooves at the end parts of the two track slabs can be correspondingly spliced into a cylindrical cavity as shown in fig. 2, so that the cylindrical limiting boss 3 correspondingly penetrates through the circular arc grooves, and then the corresponding limiting and fixing of the end part of the two track slabs at the end part is realized by the limiting boss 3. Meanwhile, the middle part of the first track slab 101 in the preferred embodiment is provided with a plurality of grouting holes 104 at intervals along the longitudinal direction, and the grouting holes are used for grouting and molding the self-compacting concrete layer 102 below the first track slab 101.

Further, in a preferred embodiment, the number of the first track units 1 is selected according to the length of the subsidence area, if the number of the first track units 1 is multiple, the adjacent first track units 1 are limited correspondingly by the cylindrical limiting bosses 3, and the first track units 1 located at two ends of the subsidence area are limited by the semi-cylindrical limiting bosses 3 arranged between the first track units 1 and the second track units 2, as shown in fig. 1; if the number of the first track units 1 is one, the two ends of the first track units 1 are respectively limited by the semi-cylindrical limiting bosses 3.

Further, the settlement adjusting structure suitable for the CRTS ii type slab ballastless track based on the CRTS iii type track slab may preferably include the following specific steps:

s1: the linear shape of the CRTS II type plate ballastless track is measured, the longitudinal length of a settlement area and the settlement amount or offset of the track in the settlement area are calculated, the longitudinal length of the first track unit 1 and the setting thickness of the self-compacting concrete layer 102 on the base plate 4 of the settlement area are correspondingly determined, the setting height of the limiting bosses 3 is determined, and the setting number of the first track plates 101, the setting number of the limiting bosses 3 and the setting height are determined. Further preferably, the line shape of the CRTS II type slab ballastless track can be measured according to a retest CP III control network.

S2: before the settlement zone remediation, the second track units 2 in the non-settlement zones on the two sides of the settlement zone are pretreated to ensure that the second track units 2 at the junction with the settlement zone can be ensured to be stable after the second track plates 201 in the settlement zone are removed; specifically, the second track slabs 201 corresponding to the two ends of the subsidence area are anchored by planting bars, so that the ends of the second track slabs 201 are tightly fixed to the base plate 4.

S3: according to construction needs, the existing equipment corresponding to the line of the settlement area is temporarily dismantled and marked correspondingly, and the main dismantled equipment comprises a ballast-ballastless transition section inter-line sealing layer, a ballast-ballastless transition section auxiliary rail, signal machine side concrete, a lateral stop block and the like.

S4: cutting the steel rail 5 at the junction of the subsidence area and the unsettled area to obtain a subsidence section steel rail corresponding to the length of the subsidence area, wherein the two ends of the steel rail are preferably in a rail locking temperature range during cutting, the steel rails 5 at the two sides of the joint seam are respectively locked by fasteners during cutting of the steel rail 5 at the subsidence area, and then a plurality of bolt holes are respectively formed in the steel rails 5 at the two sides of the joint seam correspondingly, are formed in the waist of the steel rail and are arranged at intervals along the longitudinal direction and are arranged corresponding to the steel rail joint splints, so that the corresponding connection between the subsidence section steel rail and the end part of the steel rail at the unsettled area is realized through the corresponding arrangement of; further, after the corresponding cutting of the steel rail of the subsidence section and the corresponding opening of the bolt holes are completed, the fastener of the steel rail in the subsidence area is loosened to lift the steel rail of the subsidence section and move the steel rail to the storage area of the steel rail.

S5: determining the length of construction, wherein the length of a settlement area is often longer, and the track is often required to meet the requirement that a line does not interrupt a travelling crane in the daytime during settlement adjustment construction, so the settlement adjustment construction is often required to be carried out in night skylight time; in view of the fact that the skylight time is 4 hours in general, in consideration of the speed of night construction and the temporary traffic demand of the line in the daytime, in actual construction, the settlement adjustment construction of the settlement area is divided into a plurality of construction units for corresponding construction, and the length of the construction units is the length of the two second track plates 201 in the preferred embodiment. In general, the first track plate 101 is designed to have a length equal to that of the second track plate 201 and to be a standard value.

S6: when a certain construction unit is correspondingly constructed, firstly chiseling wide and narrow joint concrete at the edge positions of two ends of the construction unit, dismantling corresponding tensioning locking pieces, and clearing concrete ash in the wide and narrow joints; then jacking the second track plate 201 corresponding to the construction unit to be separated from the mortar layer 202 at the bottom of the second track plate by using a fine adjustment jack, matching the hoisting sleeve 105 by using a track crane, and hoisting the jacked second track plate 201 to a storage area; after the second track board 201 is removed, the mortar layer 201 below the corresponding removed track board is chiseled by an electric pick, so that the top surface of the base plate 4 is displayed, and then the base plate 4 is cleaned by a high-pressure water gun.

Furthermore, after the base plate 4 is cleaned up, leveling is carried out on the top surface of the base plate 4 by utilizing quick-setting mortar, after corresponding leveling, a plurality of transition sleepers can be laid on the base plate 4 at intervals along the longitudinal direction, corresponding limiting of two ends of the transition sleepers is realized, and the transition sleepers can be wooden sleepers or steel sleepers; after longitudinal and transverse limiting of the transition sleeper in the construction unit is realized, the linear shape of the rail can be adjusted to the position corresponding to the rail in the unsettled area by adjusting the height of the fastener base plate and the plane position of the fastener, and then the contact net guide height above the subsidence area is correspondingly adjusted to meet the normal operation of the train;

after the transition sleeper is arranged, correspondingly reducing the cut subsidence section steel rail, and correspondingly connecting the subsidence section steel rail with the steel rails in the undeposited areas at two ends by using the steel rail joint clamping plates, thereby completing the corresponding construction of the construction unit in a skylight time, meeting the temporary passing of the track in the subsidence area in the construction process, and needing no strong limit structure and connection structure because the speed of the train passing through the subsidence area in the construction process can be limited;

further, in the next skylight time, repeating the process, and carrying out corresponding construction on the next construction unit until the removal of the mortar layer of the whole settlement area and the arrangement of the transition sleeper are completed; further preferably, the transition sleepers in the preferred embodiment are wooden sleepers, which are arranged at longitudinal intervals of 0.5 m.

S7: a plurality of limiting bosses 3 are arranged and molded on the base plate 4 of the settling zone corresponding to the first track plates 101, and each limiting boss comprises a semi-cylindrical second limiting boss 302 and a semi-cylindrical first limiting boss 301, wherein the semi-cylindrical second limiting bosses are respectively arranged at two ends of the settling zone, and the semi-cylindrical second limiting bosses are correspondingly arranged between the two first track plates 101; specifically, the limiting bosses 3 can be arranged by correspondingly planting bars on the base plate 4 between the transition sleepers by using an electric drill, a bar detector can be preferably adopted to avoid bars in the base plate 4 in the bar planting process during drilling, after the bars are planted and bound, corresponding pouring forming templates are installed, and the semi-cylindrical and/or cylindrical limiting bosses 3 are correspondingly poured and formed at the bar planting positions; further, when the limiting boss 3 is formed, the elevation of the top surface of the limiting boss 3 is preferably higher than the elevation of the first track plate 101 after setting, that is, the top surface of the limiting boss 3 protrudes out of the top surface of the first track plate 101 after setting, so as to provide conditions for possible subsequent adjustment, and once the adjusted track structure is settled again, the height adjustment can be realized by lifting the first track plate 101 and thickening the self-compacting concrete layer.

S8: dismantling the transition sleeper, correspondingly arranging an isolation layer 103 on the top surface of the base plate 4, wherein the isolation layer 103 in the preferred embodiment is a geotextile which is correspondingly laid, and the geotextile is ensured to be flat and centered as much as possible in the laying process and is prevented from being cut; further, correspond on laying the isolation layer 103 of accomplishing and lay the reinforcing bar net piece, correspond respectively on the bed plate 4 then and treat the first track board 101 of changing and set up the cushion to the first track board 101 hoist and mount to bed plate 4 top with the change usefulness, make the both ends of first track board can match with the spacing boss 3 that corresponds respectively, and the four corners department of first track board 101 takes respectively and puts on the cushion, the reinforcing bar net piece is laid at bed plate 4 top surface of first track board 101 below promptly.

S9: the track slab fine adjustment claw is used for fine adjustment of the first track slab 1, after the fine adjustment is qualified, filling templates of the self-compacting concrete layer 102 are correspondingly installed on two sides of each first track slab 101 in the settlement area, and a pressing device is correspondingly installed to ensure stable forming of the self-compacting concrete layer 102; and then the fast hard concrete of stirring to through on the first track board 101 along a plurality of grout holes 104 correspondence that longitudinal separation seted up between first track board 101 and the bed plate 4, form the self-compaction concrete layer 102 of first track board 101 below then, treat that the concrete condenses the sclerosis completely after, demolish pouring template, track board fine tuning claw and closing device.

S10: cleaning the filling part of the limiting boss 3, ensuring the drying of the filling part, and correspondingly measuring the distance between the limiting boss 3 and the first track slab 101, so as to fill boss resin; further, when pouring boss resin, a resin pouring bag needs to be arranged on the periphery of the limiting boss 3, so that the pouring bag is flatly adhered to the side walls of the first track plate 101 and the limiting boss 3, and then a foam side baffle and a protective pad are arranged in a crack between two adjacent track plates to prevent the resin from flowing into a gap between the two track plates.

S11: the new steel rail is conveyed to the first track unit 1 of the settlement area, under the normal condition, the length of the new steel rail is larger than that of the settlement area, then the existing steel rail 5 on one side of the settlement area and the settlement area can be correspondingly replaced by the new steel rail, the corresponding arrangement of the new steel rail can be realized by correspondingly adjusting the line shape of the steel rail, and the two ends of the new steel rail can be respectively connected with the steel rail 5 in the non-settlement area in a welding mode, so that the settlement adjustment of the ballastless track of the settlement area is completed. Further preferably, after the setting of the new steel rail is completed, the normal operation of the ballastless track can be recovered corresponding to the equipment or the structure removed in the step S3.

The utility model discloses in be applicable to CRTS II plate-type ballastless track's settlement adjustment structure, it utilizes CRTS III type track board to realize, can effectively realize ballastless track settlement regional track adjustment, guarantees ballastless track's atress stability and structural reliability after the track settlement adjustment, can effectively realize the settlement adjustment when ballastless track subsides by a wide margin, resumes ballastless track's normal use; in addition, the ballastless track can effectively realize the normal traffic of the line in the daytime in the settlement adjustment process by dividing the construction area into a plurality of construction units and correspondingly arranging corresponding transition sleepers in the adjustment process, thereby reducing the influence of the settlement adjustment process on the normal operation of the line and reducing the difficulty in train scheduling caused by track maintenance; and through replacing the track plate in the settlement area with the first track plate by the second track plate, namely replacing the original CRTS II track plate by the CRTS III track plate, the adjustment difficulty of the track plate in the settlement area due to longitudinal connection between plates is reduced, and adjustment convenience is provided for settlement adjustment of the unit track plates when secondary settlement occurs in the later settlement area, so that the settlement adjustment efficiency of the ballastless track is effectively improved, the overhaul and maintenance cost of the ballastless track is saved, and the method has better application prospect and popularization value.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A settlement adjusting structure suitable for CRTS II type slab ballastless tracks is characterized in that,

2. The settlement adjusting structure suitable for a CRTS ii type slab ballastless track of claim 1, wherein the first track unit is a plurality of track units arranged in sequence along a longitudinal direction, that is, the limiting bosses comprise a pair of second limiting bosses respectively arranged at two ends of the settlement area and at least one first limiting boss correspondingly arranged between the two second limiting bosses.

3. The settlement adjusting structure suitable for a CRTS ii type slab ballastless track according to claim 1 or 2, wherein a top of the limiting boss protrudes from a top surface of the first track slab.

4. The settlement adjusting structure suitable for CRTS II type slab ballastless tracks of claim 3, wherein the height of the top of the limiting boss protruding from the top surface of the first track slab is 50 mm.

5. The settlement adjusting structure suitable for the CRTS II type slab ballastless track of claim 1, 2 or 4, wherein a reinforcing component is arranged at the end part of the second track slab at the junction of the undeposited area and the settlement area, the reinforcing component comprises a plurality of vertically arranged anchoring steel bars, the bottom parts of the anchoring steel bars are fixed on the base plate of the undeposited area, and the top parts of the anchoring steel bars are fixedly connected with the second track slab.

6. The settlement adjusting structure suitable for the CRTS II type slab ballastless track of claim 1, 2 or 4, wherein the isolation layer is a geotextile with a certain thickness.

7. The settlement adjusting structure suitable for the CRTS II type slab ballastless track of claim 1, 2 or 4, wherein a gap with a certain width is formed between the limiting boss and the first track slab, and the gap is filled with resin.

8. The settlement adjusting structure suitable for a CRTS ii type slab ballastless track of claim 7, wherein a resin filling bag is disposed between the first track slab and the limiting boss corresponding to the filling of the resin, and the resin filling bag is flatly bonded to the side walls of the first track slab and the limiting boss.

9. The settlement adjusting structure suitable for the CRTS II type slab ballastless track of claim 7, wherein a foam side stop and a protective pad are installed in the crack between two adjacent track slabs corresponding to each limiting boss.

10. The settlement adjusting structure suitable for a CRTS ii type slab ballastless track of claim 1, 2, 4, 8 or 9, wherein the length of the first track slab is equal to the length of the second track slab.