CN114032711A - Ballastless track structure foundation settlement repairing method - Google Patents
Ballastless track structure foundation settlement repairing method Download PDFInfo
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- CN114032711A CN114032711A CN202111584549.6A CN202111584549A CN114032711A CN 114032711 A CN114032711 A CN 114032711A CN 202111584549 A CN202111584549 A CN 202111584549A CN 114032711 A CN114032711 A CN 114032711A
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- base plate
- ballastless track
- lifting device
- settlement
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 claims abstract description 38
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 19
- 239000002689 soil Substances 0.000 claims abstract description 7
- 238000011065 in-situ storage Methods 0.000 claims abstract description 5
- 238000005266 casting Methods 0.000 claims abstract description 4
- 238000013461 design Methods 0.000 claims abstract description 4
- 230000008439 repair process Effects 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims 1
- 125000003003 spiro group Chemical group 0.000 claims 1
- 239000003921 oil Substances 0.000 description 13
- 238000005457 optimization Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/04—Lifting or levelling of tracks
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a ballastless track structure foundation settlement repairing method, which comprises the following steps: determining the range of a settlement area, and measuring settlement data of the settlement area; digging up and down construction planes with set depth on the foundations at two sides of the settlement area, and enabling the construction planes to extend into the lower end of the base plate with set width; casting a concrete supporting platform on a construction plane in situ, and curing and hardening; a lifting device is arranged on the concrete supporting platform to support the base plate; lifting the base plate by a set height through the lifting device, and forming mechanical support for the state of the lifting device through a mechanical self-locking assembly on the lifting device; pouring mortar between the lifted base plate and the foundation, and curing and hardening the poured mortar; and repeating the steps S5-S6 until the foundation and the ballastless track structure meet the design requirements, dismantling the lifting device, backfilling the construction plane on the foundation to an initial state, and compacting the backfilled soil.
Description
Technical Field
The invention relates to the technical field of track construction, in particular to a ballastless track structure foundation settlement repairing method.
Background
With the large-scale construction of high-speed rail and rail transit, the ballastless track technology is widely applied, the foundation sinks or bulges along with the operation frequency and the mileage, and when the sinking amount or the bulging amount exceeds the specified technical index value, the railway line can not continue to operate. In the above-mentioned ground deformation process, the ground subsidence phenomenon is usually more, and the settlement of ground can further cause the settlement of track structure, influences the operation of railway. When the foundation subsides, need to repair ground and track to above-mentioned problem, in prior construction technology, generally need to stop the operation to repair its repair process, promptly in the repair process, should forbid train pass there, also because this reason, can great delay train dispatch, especially in winter, the maintenance duration of concrete is longer, brings very big operating pressure to vehicle operation department, and the work progress is complicated difficult, takes a lot of work and wastes time and energy.
In the prior art, chinese patent application No. 2018108476423 discloses a ballastless track structure settlement lifting device and a lifting method thereof, and specifically discloses the following technical contents: the concrete cushion is characterized by comprising lead screws which are embedded at two sides of a ballastless track plate and are arranged at intervals along the extending direction of the ballastless track plate, embedded holes used for embedding the lead screws are formed in the ballastless track plate, the embedded holes vertically penetrate through the ballastless track plate and extend downwards to a concrete cushion, nuts in threaded connection with the lead screws are sleeved on the lead screws, sleeves are sleeved on the outer walls of the lead screws, mortar columns are poured in annular gaps between the outer walls of the sleeves and the inner walls of the embedded holes, the mortar columns are adhered to the inner walls of the embedded holes to form a whole with the ballastless track plate, and the bottoms of the mortar columns are abutted to the top end faces of the nuts.
In addition, chinese patent application No. 2020103942147 discloses a settlement adjusting method and system suitable for ballastless tracks with shoulders, and specifically discloses the following technical contents: the settlement adjusting unit comprising the cast-in-place boss, the base, the elastic strip buckling assembly and the track bed connecting assembly is arranged between the shoulder-blocking rail bearing platforms of the track bed settlement section, and the height adjustment and the track gauge adjustment of the steel rail after the track bed settlement can be accurately realized by utilizing the corresponding setting of the setting height of the cast-in-place boss and the corresponding optimization of the embedding position of the insulating sleeve.
Generally, the existing ballastless track structure sequentially comprises a base plate, a track plate and a steel rail from top to bottom, the base plate is directly or indirectly arranged on a roadbed according to different ballastless track plate structures, the two documents apply technical schemes for repairing the track plate, but if the settlement of the track plate is only solved due to foundation settlement, the settlement problem cannot be completely solved without solving the fundamental reason of settlement.
Disclosure of Invention
The invention aims to overcome the defects, and provides a ballastless track structure foundation settlement repairing method, which can repair a foundation fundamentally, solve the fundamental problem of a track structure, can perform online repair and avoid influencing the operation of vehicles.
The technical scheme adopted by the invention is as follows:
the ballastless track structure foundation settlement repairing method comprises a base plate, a track plate and a steel rail which are sequentially arranged from bottom to top, wherein the track plate is bonded on the base plate through a mortar layer, the base plate is directly or indirectly arranged on a roadbed, and the repairing method comprises the following steps:
s1, determining the range of the settlement region, and measuring the settlement data of the settlement region;
s2, digging up and down construction planes with set depth on the foundation at two sides of the settlement area, and enabling the construction planes to extend into the lower end of the base plate with set width;
s3, casting the concrete supporting platform on the construction plane in situ, and curing and hardening;
s4, mounting a lifting device on the concrete support platform to support the base plate;
s5, lifting the base plate by a lifting device to set the height, and forming mechanical support for the state of the lifting device by a mechanical self-locking assembly on the lifting device;
s6, pouring mortar between the lifted base plate and the foundation, and curing and hardening the poured mortar;
and S7, repeating the steps S5-S6 until the foundation and the ballastless track mechanism meet the design requirements, dismantling the lifting device, backfilling the construction plane on the foundation to an initial state, and compacting the backfilled soil.
As a further optimization, the lifting device provided by the invention adopts a jacking oil cylinder with a mechanical self-locking mechanism, the jacking oil cylinder is directly arranged below the base plate, the jacking oil cylinder is arranged on the concrete support, a piston rod of the jacking oil cylinder is in contact with the lower end surface of the base plate through a jacking seat, and the jacking oil cylinder is in wireless electro-hydraulic control connection with the hydraulic station through an electrical system.
As a further optimization, the lifting device is arranged beside the base plate, the lifting device comprises a jacking support and at least one group of lever jacking assemblies arranged on the jacking support, each group of lever jacking assemblies comprises a jacking lever and at least one group of jacking cylinders used for driving the jacking lever to rotate, the middle part of the jacking lever is arranged on the jacking support through a hinged seat, the rotating plane of the jacking lever is a vertical plane, the jacking cylinders are fixedly arranged on the jacking support, one end of the jacking lever is connected with a piston rod of the jacking cylinder, the other end of the jacking lever is connected with a jacking seat, the jacking support is fixedly arranged on a concrete supporting platform, and in the process of lifting the base plate in the step S5, the jacking seat is in contact with the lower end face of the base plate;
the jacking oil cylinder is in wireless electro-hydraulic control connection with the hydraulic station through an electric control system.
As a further optimization, the mechanical self-locking assembly of the invention comprises a threaded self-locking sleeve and a limiting table, wherein an external thread is arranged on the outer wall surface of the cylinder body of the jacking cylinder, the threaded self-locking sleeve is in threaded connection with the cylinder body of the jacking cylinder, the limiting table is fixedly arranged on the piston rod of the jacking cylinder, the diameter of the limiting table is not smaller than the inner diameter of the threaded self-locking sleeve, and in step S5, when the piston rod of the jacking cylinder extends out of a certain length, the threaded self-locking sleeve is contacted with the limiting table through manual rotation of the threaded self-locking sleeve, so that mechanical self-locking is realized.
As a further optimization, the hinged seat and the jacking oil cylinder are arranged at the same side end of the jacking support or are respectively arranged at the different side ends of the jacking support.
As a further optimization, a pressure sensor is arranged between the jacking seat and the base plate, and the pressure sensor is used for monitoring the jacking pressure when the base plate is jacked.
As a further optimization, in step S1 of the invention, the construction range and the number of lifting devices to be arranged are determined from the measured sedimentation data of the sedimentation area.
As a further optimization, in step S3 of the present invention, the construction process of the concrete supporting platform includes the following steps: firstly, excavating a foundation pit with set size on a construction plane, wherein the set size of the foundation pit comprises the length, the width and the depth of the foundation pit; and then pouring concrete into the foundation pit, and forming the concrete supporting platform through vibrating, leveling, curing and hardening.
As a further optimization, in step S5, after the base plate is lifted by the lifting device to a set height, the state of the base plate needs to be verified by the level, and when the state of the base plate does not meet the requirement, the state of the base plate is adjusted by the lifting devices on both sides of the base plate.
As a further optimization, a displacement sensor is arranged between the construction platform and the base plate and used for monitoring the lifting height of the base plate.
The invention has the following advantages:
1. according to the settlement repairing method, after the ballastless track structure is lifted by the lifting device, the settled roadbed is subjected to bed-up repairing, so that the settlement problem of the ballastless track structure is fundamentally solved, and the subsequent settlement problem is prevented from happening again;
2. according to the settlement repairing method, after the base plate is too high through the lifting device, the state of the lifting device is locked through the mechanical locking assembly, and on-line repairing can be realized by means of the mechanical state locking, namely normal traffic on a ballastless track structure is not influenced, and the maintenance and hardening processes of mortar are not influenced;
3. according to the settlement repairing method, the base plate is lifted for multiple times, and mortar heightening is carried out layer by layer, so that the repairing operation is ensured to be gradual, and the influence of overlarge adjusting amount on the connection position is avoided;
4. the lifting device takes the hydraulic oil cylinder as power, realizes the jacking of the base plate through the lever action, can realize the purpose of providing larger supporting force with smaller power through the lever action principle, has lower requirement on the self supporting force of the hydraulic oil cylinder, is easier to realize and can also reduce the cost investment;
5. the repairing method is time-saving and labor-saving, can greatly reduce the investment of labor cost, realizes electrification control through the arrangement of a plurality of sensors, and reduces the labor intensity.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a jacking state of the method of the present invention;
FIG. 2 is a schematic top view of the process of the present invention;
FIG. 3 is a schematic front view of a jacking device;
FIG. 4 is a schematic longitudinal cross-sectional view of a jacking device;
fig. 5 is a schematic longitudinal sectional view of a lift cylinder.
Wherein: 1. the device comprises a track plate, 2, a mortar layer, 3, a base plate, 4, a roadbed, 5, a concrete supporting platform, 6, a lifting device, 7, a lifting support, 8, a lifting oil cylinder, 9, a mechanical locking assembly, 10, a lifting lever, 11, a lifting seat, 12, a hinged seat, 8-1, a cylinder body, 8-2, a piston rod, 8-3, a movable guide ring, 8-4, a fixed guide ring, 8-5, an upper baffle ring, 9-1, a thread self-locking sleeve, 9-2, a limiting table, 9-3 and a hinged ring.
Detailed Description
The present invention is further described in the following with reference to the drawings and the specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention, and the embodiments and the technical features of the embodiments can be combined with each other without conflict.
It is to be understood that the terms first, second, and the like in the description of the embodiments of the invention are used for distinguishing between the descriptions and not necessarily for describing a sequential or chronological order. The "plurality" in the embodiment of the present invention means two or more.
The term "and/or" in the embodiment of the present invention is only an association relationship describing an associated object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, B exists alone, and A and B exist at the same time. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
The embodiment provides a ballastless track structure foundation settlement repairing method, which is used for solving the settlement problem of a ballastless track caused by the foundation settlement problem, as shown in fig. 1 and 2, the ballastless track structure comprises a base plate 3, a track plate 1 and a steel rail which are sequentially arranged from bottom to top, the track plate 1 is bonded on the base plate 3 through a mortar layer 2, the base plate 3 is directly or indirectly arranged on a roadbed 4, and the repairing method comprises the following steps:
s1, determining the range of the settlement region, and measuring the settlement data of the settlement region;
the settlement condition of the ballastless track structure is evaluated through the measured settlement data, a repair scheme, a construction progress and the like are formulated, a three-dimensional model can be established through the measured settlement data, and the implementation condition of the repair scheme is further determined through three-dimensional model simulation. The determined settlement data is used for repairing, road conditions need to be evaluated through the settlement data, and when the settlement data exceeds a set value, vehicles need to be prohibited from passing through;
s2, digging up and down construction planes with set depth on the foundation at the two sides of the settlement area, and enabling the construction planes to extend into the lower end of the bottom plate 3 to set width;
this embodiment need be through lifting bed plate 3 off road bed 4 after, again to road bed 4 grout repair, consequently its construction plane should be located the below of bed plate 3, need dig down the road bed 4 of ballastless track mechanism both sides, form the construction plane, it is decided according to the size of lifting device 6 that uses down to dig the degree of depth under it, and let the construction plane stretch into the certain width under bedplate 3, the edge of bed plate 3 both sides is unsettled promptly, make things convenient for the connection of lifting device 6.
S3, casting the concrete supporting platform 5 on the construction plane in situ, and curing and hardening;
because the construction plane is original 4 structures of roadbed, 4 structures of roadbed are the soil texture structure, and the soil texture structure is when the atress is concentrated to the single-point, and the support nature is relatively poor, consequently need cast in situ concrete supporting platform 5, provide good sufficient holding power to lifting device 6, in order to guarantee concrete supporting platform 5's support stability in addition, concrete supporting platform 5's work progress does: firstly, excavating a foundation pit with a set size on a construction plane, wherein the set size of the foundation pit comprises the length, the width and the depth of the foundation pit, then pouring concrete into the foundation pit, forming a concrete supporting platform 5 through vibrating, floating, curing and hardening, and ensuring that the levelness of the concrete supporting platform 5 is within a set error range; specifically, the size and the concrete grade of the concrete supporting platform 5 should be determined after performing a verification analysis according to the soil quality of the construction place;
s4, installing a lifting device 6 on the concrete supporting platform 5 to support the base plate 3, wherein the state is shown in figures 1 and 2;
as one of the implementation modes, the lifting device 6 adopts a jacking cylinder with a mechanical self-locking mechanism, the jacking cylinder is directly arranged below the base plate 3, the jacking cylinder is installed on the concrete supporting platform 5, a piston rod of the jacking cylinder is in contact with the lower end face of the base plate 3 through a jacking seat, the jacking cylinder is in wireless electro-hydraulic control connection with the hydraulic station through an electrical system, namely the jacking cylinder is directly installed below the base plate 3, and a ballastless track structure is directly jacked through the jacking cylinder, so that the supporting performance of the jacking cylinder is higher;
as another kind of more preferred embodiment, as shown in fig. 3-4, lifting device 6 sets up the side at bed plate 3, lifting device 6 includes jacking support 7 and sets up the at least a set of lever jacking subassembly on jacking support 7, every group the lever jacking subassembly all includes jacking lever 10 and at least a set of jacking cylinder 8 that is used for driving jacking lever 10 pivoted, the middle part of jacking lever 10 sets up on jacking support 7 through articulated seat 12, and the rotation plane of jacking lever 10 is vertical plane, jacking cylinder 8 fixed mounting is on jacking support 7, articulated seat 12 and jacking cylinder 8 set up at the homonymy end of jacking support 7 or set up the different side end at jacking support 7 respectively. One end of the jacking lever 7 is connected with a piston rod 8-2 of the jacking oil cylinder 8, the other end of the jacking lever 7 is connected with a jacking seat 11, and because the connecting ends at the two ends can generate displacement in the horizontal direction in the rotating process of the jacking lever 10, the two ends of the jacking lever 10 are provided with strip holes which are connected with the piston rod 8-2 of the jacking oil cylinder 8 and the jacking seat 11, the jacking support 7 is fixedly arranged on the concrete supporting platform 5, and in the process of lifting the base plate 3, the jacking seat 11 is in contact with the lower end face of the base plate 3; the jacking oil cylinder 8 is in wireless electro-hydraulic control connection with the hydraulic station through an electric system;
as shown in fig. 5, the jacking cylinder 8 used in this embodiment includes a connection base, a cylinder body 8-1 and a piston rod 8-2, the piston rod 8-2 of this embodiment includes a plunger and a connector, the connector is provided with a hinge ring 9-3 for connecting with a jacking lever 10, the cylinder body 8-1 is fixedly connected with the connection base, the plunger is slidably disposed in the cylinder body 8-1, the inner side end of the cylinder body 8-1 is provided with a movable guide ring 8-3, the movable guide ring 8-3 is fixedly connected with the inner side end of the plunger, the outer side end of the cylinder body 8-1 is provided with a fixed guide ring 8-4, the plunger is slidably connected with the fixed guide ring 8-4, in order to install the fixed guide ring 8-4, the outer side end of the cylinder body 8-1 is provided with a step, namely, the hole diameter of the upper side of the step platform is larger than that of the lower side of the step platform, the fixed guide ring 8-4 is clamped on the step platform, the fixed guide ring 8-4 is matched with the hole diameter of the lower side of the step platform and clamped on the step platform through a boss, the upper end of the fixed guide ring 8-4 is fixed through a limit stop ring 8-5, the limit stop ring 8-5 is in threaded connection with the cylinder body 8-1, a screw hole is formed in the upper side of the step platform, the limit stop ring 8-5 is connected in the screw hole, and further fixing can be achieved through a side screw. A plurality of sealing rings are arranged between the plunger and the fixed guide ring 8-4 as well as the limit baffle ring 8-5, an oil inlet hole is arranged on the cylinder body 8-1, and the oil inlet hole is communicated with a cavity between the plunger and the connecting base in the cylinder body 8-1;
s5, lifting the base plate 3 by the lifting device 6 to set the height, and forming mechanical support for the state of the lifting device 6 by the mechanical self-locking assembly on the lifting device 6;
when lifting base plate 3 through above-mentioned lifting device 6, through controlling the solenoid directional valve, pressurize in the jacking cylinder, jacking cylinder stretches out behind the settlement length, set for the height to 3 jacking of base plate, set up displacement sensor in order to keep between base plate 3 and the road bed 4, the lifting height through displacement sensor monitoring base plate 3, can also supply the pressure to the jacking cylinder ration through the form that sets up the proportional valve, keep specific lifting height, set for the height with 3 lifting of base plate through lifting device 6 after, need check up the state of base plate 3 through the spirit level, when the state of base plate 3 does not satisfy the requirement, the jacking device through 3 both sides of base plate is adjusted the state of base plate 3.
In this embodiment, the mechanical self-locking assembly 9 includes a threaded self-locking sleeve 9-1 and a limiting table 8-2, an external thread is provided on an outer wall surface of a cylinder body 8-1 of the jacking cylinder 8, the threaded self-locking sleeve 9-1 is in threaded connection with the cylinder body 8-1 of the jacking cylinder 8, the limiting table 8-2 is fixedly arranged on a piston rod 8-2 of the jacking cylinder 8, and a diameter of the limiting table 8-2 is not smaller than an inner diameter of the threaded self-locking sleeve 8-1, when the piston rod 8-2 of the jacking cylinder 8 extends out by a certain length, the threaded self-locking sleeve is contacted with the limiting table by manually rotating the threaded self-locking sleeve, so as to realize mechanical self-locking, after the jacking cylinder 8 is self-locked, the jacking cylinder can be kept in a specific state, and the ballastless track structure can be kept in a traffic state by supporting the track slab 1, realizing on-line repair;
s6, pouring mortar between the lifted base plate 3 and the foundation, and curing and hardening the poured mortar;
and S7, repeating the steps S5-S6 until the foundation and the ballastless track mechanism meet the design requirements, dismantling the lifting device 6, backfilling the construction platform on the foundation to an initial state, compacting the backfilled soil, and periodically rechecking the ballastless track structure at the construction position after the construction is finished.
This embodiment is during the construction, to the condition that the ground subsides, adopt lifting restoration one by one, certain height of lifting at every turn promptly, if lifting 5mm at every turn, then according to the space of lifting, carry out the grout and restore, after the mortar layer 2 maintenance of pouring into reaches the certain degree, the state that need not reach the complete hardening, the adhesion strength between every layer of mortar layer 2 can be increased to the intermediate state, then to further certain height of lifting, carry out the repetitive operation again, reach the state before subsiding until track board 1.
In this embodiment, still be provided with a plurality of sensors and be used for automatic electrical control, if every be provided with pressure sensor between jacking seat and the bed plate 3, pressure sensor is used for the jacking pressure of control when jacking bed plate 3. In the foregoing, be provided with displacement sensor between construction platform and the bed plate 3, displacement sensor is used for monitoring the lifting height of bed plate 3, can also set up electronic gyroscope and be used for monitoring ballastless track's state, through the fuel feeding pressure of pressure sensor control jacking cylinder.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The utility model provides a ballastless track structure foundation subsides repair method, ballastless track structure includes bed plate, track board and the rail that sets gradually from bottom to top, the track board passes through the mortar layer and bonds on the bed plate, the bed plate directly or indirectly sets up on the road bed, its characterized in that: the repairing method comprises the following steps:
s1, determining the range of the settlement region, and measuring the settlement data of the settlement region;
s2, digging up and down construction planes with set depth on the foundation at two sides of the settlement area, and enabling the construction planes to extend into the lower end of the base plate with set width;
s3, casting the concrete supporting platform on the construction plane in situ, and curing and hardening;
s4, mounting a lifting device on the concrete support platform to support the base plate;
s5, lifting the base plate by a lifting device to set the height, and forming mechanical support for the state of the lifting device by a mechanical self-locking assembly on the lifting device;
s6, pouring mortar between the lifted base plate and the foundation, and curing and hardening the poured mortar;
and S7, repeating the steps S5-S6 until the foundation and the ballastless track structure meet the design requirements, dismantling the lifting device, backfilling the construction plane on the foundation to an initial state, and compacting the backfilled soil.
2. The ballastless track structure foundation settlement repairing method of claim 1, which is characterized in that: lifting device adopts the jacking cylinder that has mechanical self-locking mechanism, jacking cylinder directly sets up in the below of bed plate, and jacking cylinder installs and evaluates at the concrete support, and jacking cylinder's piston rod contacts through the lower terminal surface of jacking seat with the bed plate, jacking cylinder carries out wireless electric liquid control through electrical system and hydraulic pressure station and is connected.
3. The ballastless track structure foundation settlement repairing method of claim 1, which is characterized in that: the lifting device is arranged beside the base plate and comprises a jacking support and at least one group of lever jacking assemblies arranged on the jacking support, each group of lever jacking assemblies comprises a jacking lever and at least one group of jacking oil cylinders used for driving the jacking lever to rotate, the middle part of the jacking lever is arranged on the jacking support through a hinged seat, the rotating plane of the jacking lever is a vertical plane, the jacking oil cylinders are fixedly arranged on the jacking support, one end of each jacking lever is connected with a piston rod of each jacking oil cylinder, the other end of each jacking lever is connected with a jacking seat, the jacking supports are fixedly arranged on a concrete supporting platform, and in the process of lifting the base plate in the step S5, the jacking seats are in contact with the lower end face of the base plate;
the jacking oil cylinder is in wireless electro-hydraulic control connection with the hydraulic station through an electric control system.
4. The ballastless track structure foundation settlement repairing method of claim 2 or 3, characterized in that: mechanical auto-lock subassembly includes screw thread self-locking cover and spacing platform, the outer wall of jacking cylinder 'S cylinder body is provided with the external screw thread, looks spiro union between screw thread self-locking cover and jacking cylinder' S the cylinder body, spacing platform is fixed to be set up on jacking cylinder 'S piston rod, and the diameter of spacing platform is not less than the internal diameter of screw thread self-locking cover, and in step S5, when jacking cylinder' S piston rod stretches out certain length, through manual rotatory screw thread self-locking cover, make screw thread self-locking cover and spacing platform contact, realize mechanical auto-lock.
5. The ballastless track structure foundation settlement repairing method of claim 3, wherein: the hinged seat and the jacking oil cylinder are arranged at the same side end of the jacking support or at the different side ends of the jacking support respectively.
6. The ballastless track structure foundation settlement repairing method of claim 5, wherein: be provided with pressure sensor between jacking seat and the bed plate, pressure sensor is used for the jacking pressure of control when jacking bed plate.
7. The ballastless track structure foundation settlement repairing method of claim 1, which is characterized in that: in step S1, the construction area and the number of lifting devices to be arranged are determined from the measured sedimentation data of the sedimentation area.
8. The ballastless track structure foundation settlement repairing method of claim 1, which is characterized in that: in step S3, the construction process of the concrete support platform includes the following steps: firstly, excavating a foundation pit with set size on a construction plane, wherein the set size of the foundation pit comprises the length, the width and the depth of the foundation pit; and then pouring concrete into the foundation pit, and forming the concrete supporting platform through vibrating, leveling, curing and hardening.
9. The ballastless track structure foundation settlement repairing method of claim 1, which is characterized in that: in step S5, after the base plate is lifted by the lifting device to a set height, the state of the base plate needs to be verified by the level, and when the state of the base plate does not meet the requirement, the state of the base plate is adjusted by the jacking devices on the two sides of the base plate.
10. The ballastless track structure foundation settlement repairing method of claim 1, which is characterized in that: be provided with displacement sensor between construction platform and the bed plate, displacement sensor is used for monitoring the lifting height of bed plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111584549.6A CN114032711A (en) | 2021-12-22 | 2021-12-22 | Ballastless track structure foundation settlement repairing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111584549.6A CN114032711A (en) | 2021-12-22 | 2021-12-22 | Ballastless track structure foundation settlement repairing method |
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| CN114032711A true CN114032711A (en) | 2022-02-11 |
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| CN202111584549.6A Pending CN114032711A (en) | 2021-12-22 | 2021-12-22 | Ballastless track structure foundation settlement repairing method |
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