A smoothness collaborative regulation method for lifting up a ballastless track foundation and track fine adjustment

Abstract

The application discloses a kind of plainness collaborative control method of ballastless track foundation lifting and track fine adjustment, specific steps are as follows: S1, demarcate foundation deformation control interval;S2, construct fastener adjustment point information dataset;S3, measure track static geometric position and calculate deviation;S4, identify subgrade weak work point;S5, calculate minimum threshold adjustment amount of line longitudinal section based on multi-chord optimization model and obtain multi-chord optimization line;S6, generate foundation lifting plan work point number set;S7, calculate collaborative adjustment amount based on line smoothness control collaborative optimization model and obtain the collaborative control line shape of foundation lifting and track fine adjustment;S8, evaluate control effect and iterative optimization;S9, output the collaborative control scheme of foundation lifting and track fine adjustment.The application technology is through the implementation of foundation lifting and track fine adjustment collaborative operation, reduces unnecessary lifting operation range, reduces unnecessary lifting amount, eliminates repeated, cross operation, realizes the effective compression of construction period.

Description

Technical Field

[0001] This invention relates to the field of track engineering technology, specifically to a method for the coordinated control of smoothness between ballastless track foundation lifting and track fine-tuning. Background Technology

[0002] The ballastless track-subgrade system is the core load-bearing structure of high-speed railways, and its geometric smoothness directly determines the safety and comfort of train operation. Long-term operational experience shows that uneven settlement in local subgrade sections can directly cause significant track irregularities, thereby exacerbating the dynamic response of the train-track system and posing a potential risk to line operation. Due to its high structural rigidity, the geometric adjustment of the ballastless track system relies primarily on the limited adjustment capabilities of the fastener system. Once track deviations exceed the adjustable range of the fasteners, track smoothness control faces significant technical challenges.

[0003] Currently, the main methods for smoothness control of ballastless track lines in areas with roadbed settlement include emergency treatment with special fasteners, mechanical correction technology, and grouting lifting technology. Among these, grouting lifting technology (such as patents CN117707031A and CN117569122B) has become the preferred technology for the treatment of track settlement during the operational period due to its dual functions of alignment correction and foundation reinforcement, as well as the advantage of relatively lightweight construction equipment. However, this technology is still mainly operated manually, and a single track window can only handle the length of a few spans of track slabs; in addition, the lifting amount in a single operation is limited by a safety threshold, and large settlement sites need to be implemented gradually in multiple track window cycles, resulting in a significant increase in the construction period as the lifting amount increases.

[0004] Against this technological backdrop, traditional grouting and lifting schemes typically aim to fully restore the designed alignment, often resulting in lifting ranges and amounts exceeding actual needs. This not only increases the workload but also prolongs the construction period. Furthermore, the existing process of separating foundation lifting and track fine-tuning involves repetitive tasks, further increasing time and cost pressures. As my country's high-speed railway network enters a phase of large-scale operation and maintenance, there is an urgent need to develop a highly efficient control method that coordinates and optimizes foundation lifting and track fine-tuning to improve the overall efficiency of smoothness control for ballastless track lines. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a method for the coordinated control of smoothness in ballastless track foundation lifting and track fine-tuning. By accurately identifying work points to reduce the scope of unnecessary lifting operations, optimizing the coordinated operation of foundation lifting and track fine-tuning to reduce unnecessary lifting amounts, eliminating repetitive and overlapping operations, shortening the construction period, and improving construction efficiency.

[0006] The specific technical solution of the present invention is as follows:

[0007] A method for coordinated control of smoothness between ballastless track foundation lifting and track fine-tuning, the specific steps of which are as follows:

[0008] S1, Delineate the foundation deformation control range: Based on the dynamic and static detection data of the line, delineate the foundation deformation control range covering the roadbed settlement points, wherein the settlement deformation at the start and end points of the foundation deformation control range is in a stable state.

[0009] S2, Construct a fastener adjustment point information dataset: Collect information on fastener adjustment points within the foundation deformation control range point by point, and construct a fastener adjustment point information dataset, wherein the fastener adjustment point information includes fastener adjustment point numbers. i Fastener type, adjustable elevation AE i and remaining adjustable amount RAE i Number the adjustment points of the fasteners that have been fitted with special adjustment fasteners. i 1. Included in the numbering set N 1;

[0010] S3, Measure the static geometry of the track and calculate the deviation: Measure the static geometry of the track within the foundation deformation control range, and calculate the deviation between the measured elevation and the design elevation at each fastener adjustment point. D i ;

[0011] S4. Identify weak subgrade points: Based on the on-site investigation results and historical remediation records, determine the preventive maintenance points requiring foundation reinforcement. These preventive maintenance points are identified by corresponding fastener adjustment point numbers. These preventive maintenance points include at least points with excessive settlement rates and points with frost heave and mudslide defects. The fastener adjustment point numbers corresponding to the points with excessive settlement rates are... i 2. Included in the numbering set N 2. Number the fastener adjustment points corresponding to the mud pumping and frost damage. i 3. Included in the numbering set N 3;

[0012] S5. Based on the multi-chord length optimization model, calculate the minimum threshold adjustment amount of the longitudinal profile of the line and obtain the multi-chord length optimized alignment: Integrate high-speed rail maintenance specifications and construction personnel experience to determine the track irregularity management standards for the foundation deformation control section; establish a multi-chord length optimization model for the track alignment and determine the objective function. f 1. Based on the first constraint condition, and using optimization theory, calculate the minimum threshold adjustment amount for the longitudinal profile of the line. MAD i This allows for the acquisition of multi-chord length optimized alignment, determining the initial selection range for foundation lifting; MAD i > RAE i Fastener adjustment point numberi 4. Included in the numbering set N 4;

[0013] S6, Generate a set of work site numbers for the basic lifting plan: [This step involves] processing the number set... N 1~ N 4. Perform a union operation to generate a preliminary set of work sites for basic lifting. N 0; Based on the minimum length and minimum interval constraints of continuous foundation lifting operations, supplement or merge adjacent work points of the initially selected foundation lifting work points, and number the fastener adjustment points corresponding to the supplemented or merged work points. i 5. Included in the numbering set N 5. and the initial selection of work sites for foundation lifting. N 0. Merge to form a basic lifting plan number set N sub ;

[0014] S7, Calculate the coordinated adjustment amount and obtain the coordinated control alignment of foundation lifting and track fine-tuning based on the track smoothness control coordinated optimization model: based on the adjustable elevation of fasteners. AE i Remaining adjustable amount RAE i In accordance with track irregularity management standards, establish a collaborative optimization model for track smoothness control and determine the objective function. f 2. The second constraint is applied, and the cooperative adjustment amount is solved based on optimization theory. AD i This allows for the coordinated control of base lifting and track fine-tuning.

[0015] S8, Evaluate the control effect and iteratively optimize: Simulate and evaluate the coordinated control line shape, and iteratively optimize the coordinated control scheme based on whether the line smoothness meets the management standards until the line smoothness meets the management standards.

[0016] S9, output the coordinated control scheme of foundation lifting and track fine-tuning.

[0017] Furthermore, in step S3, the method for measuring the static geometric position of the track specifically involves using a track detector to collect the vertical coordinate data of the ballastless track within the foundation deformation control range, obtaining the measured track alignment, and obtaining the static geometric position of the track based on the measured track alignment.

[0018] Furthermore, in step S5, the construction of the multi-chord length optimization model includes the following steps:

[0019] Step S501: Define an optimized unit consisting of adjacent fasteners, the length of which is equal to the maximum length of the detected chord. l max The deviation between the measured elevation and the design elevation.D i The decomposition is performed, and the decomposition formula is:

[0020]

[0021] in, MAD i This is the minimum threshold adjustment amount. RD i This represents the remaining elevation deviation.

[0022] Step S502, construct the objective function f 1. The calculation formula is as follows:

[0023]

[0024] In the formula, n The number of fastener adjustment points within the basic deformation control range;

[0025] Step S503: Establish the first midpoint chord measurement method constraint condition for track irregularities. The first midpoint chord measurement method constraint condition is as follows:

[0026]

[0027] In the formula, RD q This represents the remaining elevation deviation at the midpoint of the chord starting point. RD z This represents the remaining elevation deviation at the midpoint of the chord endpoint. ξ 1 is the chord length detected at the midpoint. l Corresponding midpoint chord measurement management value;

[0028] Step S504: Establish the first vector difference method constraint condition for track irregularity. The first vector difference method constraint condition is as follows:

[0029]

[0030] In the formula, RDj This refers to the remaining elevation deviation at the half-wavelength position in front of the fastener adjustment point. RDh This refers to the remaining elevation deviation at the half-wavelength position behind the fastener adjustment point; RDs The remaining elevation deviation at the starting point of the chord for the vector distance difference detection is... RDe The remaining elevation deviation at the endpoint of the chord of the vector distance difference detection; k The coefficients are used to calculate the difference between the vector distances. ξ2 String length for detecting the distance difference between vectors L The corresponding vector distance difference management value;

[0031] Step S505: Integrate multiple chord lengths l chord lengthL The corresponding first midpoint chord measurement method constraint and the first vector difference method constraint form the first joint constraint condition for track irregularity.

[0032] Furthermore, in step S6, the minimum length and minimum interval constraints for continuous operation of foundation lifting are as follows: the length of slab track is not less than the length of a single track slab, and the length of double-slab track is not less than the length of a single track bed slab.

[0033] Furthermore, in step S7, the construction of the line smoothness control collaborative optimization model includes the following steps:

[0034] Step S701: Define an optimized unit consisting of adjacent fasteners, the length of which is equal to the maximum length of the detected chord. l max The deviation between the measured elevation and the design elevation. D i The decomposition is performed, and the decomposition formula is:

[0035]

[0036] In the formula, AD i To coordinate and adjust the amount; RD i This represents the remaining elevation deviation.

[0037] Step S702, construct the objective function f 2. The calculation formula is as follows:

[0038]

[0039] In the formula, α The linear optimization weight coefficient is used to adjust the focus of the optimization objective. Increasing it strengthens the restoration of the line position, while decreasing it focuses on the control of the adjustment amount. δ The discriminant function for the base lifting work point takes the following values:

[0040]

[0041] Step S703: Establish the second midpoint chord measurement method constraint conditions for track irregularities. The second midpoint chord measurement method constraint conditions are as follows:

[0042]

[0043] In the formula, P This represents the allowance for precision during foundation lifting, with a value of 1mm.

[0044] Step S704: Establish the second vector difference method constraint condition for track irregularities. The second vector difference method constraint condition is as follows:

[0045]

[0046] Step S705: Establish fastener coordination adjustment constraint conditions. The fastener coordination adjustment constraint conditions are as follows:

[0047]

[0048] In the formula, β This is the penalty factor, and its value is a positive real number much greater than 1;

[0049] Step S706: Integrate multiple string lengths l and L The corresponding second midpoint chord measurement method constraint condition and second vector distance difference method constraint condition, as well as the fastener coordination adjustment amount constraint condition, form the second joint constraint condition for line smoothness control coordination.

[0050] Furthermore, the foundation lifting employs polyurethane grouting technology.

[0051] Furthermore, in step S9, the coordinated control scheme specifically includes:

[0052] S901, Calculation N sub The fastener adjustment point number in the number set corresponds to the foundation lift of the work site, and the foundation lift is... L i 1 = AD i - RAE i + AE i Fastener adjustment amount F i 1 = RAE i - AE i All special adjustment fasteners have been replaced with regular fasteners;

[0053] S902, calculate the non-described N sub The fastener adjustment point number in the number set corresponds to the fastener adjustment amount at the work point, and the fastener adjustment amount is... F i 2 = AD i .

[0054] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0055] (1) Based on the multi-chord length control theory, the minimum threshold adjustment amount of the longitudinal section of the line is calculated. Combined with the requirements of preventive maintenance and the constraints of grouting process, the necessary work points for foundation lifting are accurately identified. Compared with the traditional method of restoring the design line shape, the scope of unnecessary lifting operations can be significantly reduced.

[0056] (2) By constructing a collaborative optimization model for line smoothness control, the foundation lifting amount and fastener adjustment amount are solved simultaneously. Under the premise of ensuring the driving power performance and structural adjustability margin, unnecessary lifting amount is effectively reduced, and the optimal balance between construction economy and long-term effectiveness of the treatment is achieved.

[0057] (3) A coordinated control process of foundation lifting and track fine adjustment is proposed. By reconstructing the process logic, the repetitive adjustment links caused by traditional fragmented operations are eliminated, thereby achieving a systematic improvement in control efficiency. Attached Figure Description

[0058] Figure 1 The flowchart illustrates the method for coordinated control of smoothness of ballastless track foundation lifting and track fine-tuning provided by this invention.

[0059] Figure 2 This is a schematic diagram illustrating the adjustable height and remaining adjustable height of the fastener in an embodiment of the present invention.

[0060] Figure 3 This is a schematic diagram illustrating the principle of the midpoint chord measurement method and the vector difference method for track irregularity constraint in this embodiment of the invention.

[0061] Figure 4 This is a schematic diagram of the method for generating the set of work site numbers for the basic lifting plan in an embodiment of the present invention.

[0062] Figure 5 This is a schematic diagram showing the solution results of the coordinated adjustment amount of foundation lifting and track fine-tuning in an embodiment of the present invention. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of this invention clearer, the specific embodiments of this invention will be further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are only for explaining this invention and not all embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0064] Example

[0065] This embodiment takes the track alignment control of a high-speed railway subsidence section during operation as an example to illustrate in detail the smoothness coordinated control method of ballastless track foundation lifting and track fine-tuning described in this invention. Figure 1The basic process of a smoothness coordination control method for ballastless track foundation lifting and track fine-tuning is disclosed in this invention.

[0066] like Figure 1 As shown, the present invention provides a method for coordinated control of smoothness of ballastless track foundation lifting and track fine-tuning, comprising steps S1 to S9, the specific steps of which are as follows:

[0067] S1, Delineate the foundation deformation control range: Based on the dynamic and static detection data of the line, delineate the foundation deformation control range covering the roadbed settlement points, wherein the settlement deformation at the start and end points of the foundation deformation control range is in a stable state.

[0068] In this embodiment, the track section is laid with CRTS-Ⅰ type slab track without ballast, designed for an operating speed of 300 km / h, and equipped with a WJ-7 type fastener system with a maximum adjustable height of 26 mm. 36 months after track laying, localized areas experienced excessive subgrade settlement rate and frost heave. To meet the needs of track alignment adjustment, some fasteners were temporarily replaced with special adjustment fasteners, with a maximum adjustable height of 70 mm. Based on the dynamic and static detection data of track geometry, a foundation deformation control interval covering the subgrade settlement points was delineated. The total length of the foundation deformation control interval is 200 m. The settlement at the start and end points of the foundation deformation control interval has been less than 2 mm in the past 12 months, indicating a stable state.

[0069] S2, Construct a fastener adjustment point information dataset: Based on historical maintenance records from the engineering department, collect information on fastener adjustment points within the foundation deformation control range point by point, and construct a fastener adjustment point information dataset, wherein the fastener information includes fastener adjustment point numbers. i Fastener type, adjustable elevation AE i and remaining adjustable amount RAE i , Figure 2 The schematic diagrams of the adjustable elevation and remaining adjustable elevation have been disclosed; the adjustment points of the fasteners that have adopted special adjustment fasteners have been numbered. i 1. Included in the numbering set N 1;

[0070] In this embodiment, a total of 320 pairs of fasteners are arranged in the basic deformation control range.

[0071] S3. Measure the static geometry of the track and calculate the deviation: Measure the static geometry of the track within the foundation deformation control zone. This requires a track inspection instrument to collect the vertical coordinate data of the ballastless track within the control zone and obtain the measured track alignment. Figure 5 The schematic diagram illustrating the results of the coordinated adjustment of the foundation lifting and track fine-tuning shows the measured alignment results in this embodiment. Then, based on the measured track alignment data, the deviation between the measured elevation and the design elevation at each fastener adjustment point is calculated point by point.D i .

[0072] S4. Identify weak subgrade points: Based on the on-site survey results and historical remediation records, determine the preventive maintenance points requiring foundation reinforcement. These preventive maintenance points are identified by corresponding fastener adjustment point numbers. These preventive maintenance points include at least points with excessive settlement rates and points with frost heave and mudslide defects. The fastener adjustment point numbers corresponding to the settlement rate exceeding the limit are... i 2. Included in the numbering set N 2. Number the fastener adjustment points corresponding to the mud pumping and frost damage. i 3. Included in the numbering set N 3; In this embodiment, the settlement rate threshold is set to 5 mm / year. When the settlement rate exceeds this threshold, it is considered to be exceeding the limit.

[0073] S5. Based on the multi-chord length optimization model, calculate the minimum threshold adjustment amount of the longitudinal profile of the line and obtain the multi-chord length optimized alignment: Integrate high-speed rail maintenance specifications and construction personnel experience to determine the track irregularity management standards for the foundation deformation control section; establish a multi-chord length optimization model for the track alignment and determine the objective function. f 1 and constraints C 1. And calculate the minimum threshold adjustment amount of the longitudinal profile of the line based on the optimization theory. MAD i And obtain the multi-chord length optimized line shape; MAD i > RAE i Fastener adjustment point number i 4. Included in the numbering set N 4;

[0074] When solving multi-chord length optimization models, the optimization theory used is one of the simplex method, branch and bound method, or steepest descent method. The specific optimization theory to be chosen depends on the characteristics of the actual problem.

[0075] In this embodiment, the track irregularity management standards for the foundation deformation control section are determined with reference to the provisions of the high-speed railway design specifications and construction guidelines. Specifically, the track irregularity management standards for the foundation deformation control section are: chord midpoint measurement value ≤ 2mm at 10m chord, chord midpoint measurement value ≤ 7mm at 60m chord, and chord distance difference ≤ 10mm at 300m. Based on these standards, a multi-chord length optimization model for the track alignment is established.

[0076] Figure 3 The schematic diagrams of the midpoint chord measurement method and the vector distance difference method are disclosed. The construction of the multi-chord length optimization model includes the following steps:

[0077] Step S501: Define an optimized unit consisting of adjacent fasteners, the length of which is equal to the maximum length of the detected chord. lmax The deviation between the measured elevation and the design elevation. D i The decomposition is performed, and the decomposition formula is:

[0078]

[0079] in, RD i This represents the remaining elevation deviation.

[0080] Step S502, construct the objective function f 1. The calculation formula is as follows:

[0081]

[0082] In the formula, n The number of fastener adjustment points within the basic deformation control range;

[0083] Step S503: Establish the first midpoint chord measurement method constraint condition for track irregularities. The first midpoint chord measurement method constraint condition is as follows:

[0084]

[0085] In the formula, RD q This represents the remaining elevation deviation at the midpoint of the chord starting point. RD z This represents the remaining elevation deviation at the midpoint of the chord endpoint. ξ 1 is the chord length detected at the midpoint. l Corresponding midpoint chord measurement management value;

[0086] Step S504: Establish the first vector difference method constraint condition for track irregularity. The first vector difference method constraint condition is as follows:

[0087]

[0088] In the formula, RDj This refers to the remaining elevation deviation at the half-wavelength position in front of the fastener adjustment point. RDh This refers to the remaining elevation deviation at the half-wavelength position behind the fastener adjustment point; RDs The remaining elevation deviation at the starting point of the chord for the vector distance difference detection is... RDe The remaining elevation deviation at the endpoint of the chord of the vector distance difference detection; k The coefficients are used to calculate the difference between the vector distances. ξ 2 represents the chord length of the detection chord for the vector distance difference. L The corresponding vector distance difference management value;

[0089] Step S505: Integrate multiple chord lengths l chord lengthL The corresponding first midpoint chord measurement method constraint and the first vector difference method constraint form the first joint constraint condition for track irregularity.

[0090] In this embodiment, the chord length l Including 10m chord length, 60m chord length, chord length L Includes a chord length of 300m.

[0091] Solve the above model based on optimization theory to obtain the minimum threshold adjustment amount for the multi-chord length optimized alignment and longitudinal profile. MAD i ,Will MAD i > RAE i The fastener numbers are assigned to the number set. N 4. Figure 5 The schematic diagram showing the solution results of the coordinated adjustment of the base lift and track fine-tuning illustrates the results of the multi-chord length optimization alignment in this embodiment.

[0092] S6, Generate a set of work site numbers for the basic lifting plan: [This step involves] processing the number set... N1 ~ N4 Perform a union operation to generate a preliminary set of work sites for basic lifting. N 0; Based on the minimum length and minimum interval constraints of continuous foundation lifting operations, supplement or merge adjacent work points of the initially selected foundation lifting work points, and number the fastener adjustment points corresponding to the supplemented or merged work points. i 5. Included in the numbering set N 5. and the initial selection of work sites for foundation lifting. N 0. Merge to form a basic lifting plan number set N sub .

[0093] Preferably, the minimum length and minimum interval constraints for continuous operation of foundation lifting are as follows: the length of slab track is not less than the length of a single track slab, and the length of double-slab track is not less than the length of a single track slab. In this embodiment, the length of a single track slab is set to 5.0m.

[0094] S7, Calculate the coordinated adjustment amount based on the track smoothness control coordinated optimization model and obtain the coordinated control alignment of foundation lifting and track fine-tuning: based on the adjustable amount of fastener elevation. AE i Remaining adjustable amount RAE i In accordance with track irregularity management standards, establish a collaborative optimization model for track smoothness control and determine the objective function. f 2 and constraints C 2. And solve the collaborative adjustment amount based on the optimization theory. AD iAnd obtain the coordinated control line shape of base lifting and track fine-tuning;

[0095] In this embodiment, the selection of optimization theory needs to be combined with the characteristics of the actual problem.

[0096] The construction of the line smoothness control collaborative optimization model includes the following steps:

[0097] Step S701: Define an optimized unit consisting of adjacent fasteners, the length of which is equal to the maximum length of the detected chord. l max The deviation between the measured elevation and the design elevation. D i The decomposition is performed, and the decomposition formula is:

[0098]

[0099] In the formula, RD i This represents the remaining elevation deviation.

[0100] Step S702, construct the objective function f 2. The calculation formula is as follows:

[0101]

[0102] In the formula, α The linear optimization weight coefficient is used to adjust the focus of the optimization objective. Increasing it strengthens the restoration of the line position, while decreasing it focuses on the control of the adjustment amount. δ The discriminant function for the base lifting work point takes the following values:

[0103]

[0104] Step S703: Establish the second midpoint chord measurement method constraint conditions for track irregularities. The second midpoint chord measurement method constraint conditions are as follows:

[0105]

[0106] In the formula, P This represents the allowance for precision during foundation lifting, with a value of 1mm.

[0107] Step S704: Establish the second vector difference method constraint condition for track irregularities. The second vector difference method constraint condition is as follows:

[0108]

[0109] Step S705: Establish fastener coordination adjustment constraint conditions. The fastener coordination adjustment constraint conditions are as follows:

[0110]

[0111] In the formula, β The penalty factor has a value that is a positive real number much greater than 1; in this embodiment... β The value is 100;

[0112] Step S706: Integrate multiple string lengths l and L The corresponding second midpoint chord measurement method constraint condition and second vector distance difference method constraint condition, as well as the fastener coordination adjustment amount constraint condition, form the second joint constraint condition for line smoothness control coordination.

[0113] In this embodiment, the chord length l Including 10m chord length, 60m chord length, chord length L Includes a chord length of 300m.

[0114] Based on optimization theory, the above-mentioned track smoothness control collaborative optimization model is solved to obtain the collaborative control alignment and collaborative adjustment amount of base lifting and track fine-tuning. AD i . Figure 5 The schematic diagram showing the results of the coordinated adjustment of the base lift and track fine-tuning illustrates the results of the coordinated control of the linear shape in this embodiment.

[0115] S8. Evaluate the control effect and iteratively optimize: Simulate and evaluate the coordinated control alignment of foundation lifting and track fine-tuning, and iteratively optimize the coordinated control scheme based on whether the line smoothness meets management standards to obtain a coordinated control scheme for foundation lifting and track fine-tuning. In this embodiment, compared with traditional rectification methods, the workload of line smoothness control is reduced by more than 20%.

[0116] S9 outputs a coordinated control scheme for base lifting and orbit fine-tuning:

[0117] S901, Calculation N sub The fastener adjustment point number in the number set corresponds to the foundation lift of the work site, and the foundation lift is... L i 1 = AD i - RAE i + AE i Fastener adjustment amount F i 1 = RAE i - AE i All special adjustment fasteners have been replaced with regular fasteners;

[0118] S902, calculate the non-describedN sub The fastener adjustment point number in the number set corresponds to the fastener adjustment amount at the work point, and the fastener adjustment amount is... F i 2 =AD i .

[0119] In this embodiment, the foundation lifting adopts polyurethane grouting technology and meets the following conditions:

[0120] 1) It can achieve sub-millimeter level lifting accuracy control;

[0121] 2) By adjusting the grouting process parameters, a targeted lifting and reinforcement combined effect or a single reinforcement effect can be achieved;

[0122] 3) By optimizing the dynamic characteristics and load distribution features of the subgrade structure, the subgrade settlement after regulation can be effectively suppressed.

[0123] The above embodiments are only used to illustrate the design concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The parameter settings described are only examples of method application, and should be reasonably selected according to the actual situation in specific applications. The scope of protection of the present invention is not limited to the above embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for smoothness collaborative control of foundation lifting and track fine adjustment of ballastless track, characterized in that, The specific steps are as follows: S1, defining a basic deformation control interval: based on line static and dynamic detection data, a basic deformation control interval covering the roadbed settlement work point is defined, and the settlement deformation at the starting and ending points of the basic deformation control interval is in a stable state; S2, constructing the fastener adjustment point information dataset: collecting the information of the fastener adjustment points in the basic deformation regulation interval point by point, and constructing the fastener adjustment point information dataset, wherein the fastener adjustment point information comprises fastener adjustment point number i , fastener model, height adjustable amount AE i , and remaining adjustable amount RAE i ; the fastener adjustment point number of the fastener that has adopted special adjustment is i 1 included in the number set N 1; S3, measuring track static geometric position and calculating deviation: measuring track static geometric position of the basic deformation regulation interval, calculating deviation of measured elevation at each fastener adjustment point from designed elevation D i ; S4. Identify weak subgrade points: Based on the on-site investigation results and historical remediation records, determine the preventive maintenance points requiring foundation reinforcement. These preventive maintenance points are identified by corresponding fastener adjustment point numbers. These preventive maintenance points include at least points with excessive settlement rates and points with frost heave and mudslide defects. The fastener adjustment point numbers corresponding to the points with excessive settlement rates are... i 2. Included in the numbering set N 2. Number the fastener adjustment points corresponding to the mud pumping and frost damage. i 3. Included in the numbering set N 3; S5, calculating the minimum threshold adjustment amount of the line vertical section and obtaining the multi-chord optimization alignment based on the multi-chord optimization model: comprehensively considering the high-speed rail maintenance specification and the experience of construction personnel, determining the track irregularity management standard of the basic deformation regulation and control interval; establishing the multi-chord optimization model of the track alignment, determining the objective function f 1 and the first constraint condition, and calculating the minimum threshold adjustment amount of the line vertical section according to the optimization theory MAD i , thereby obtaining the multi-chord optimization alignment and determining the basic lifting preliminary selection range; determining the adjustment point number of the fastener MAD i > RAE i of the fastener i 4 is included in the number set N 4; S6, generating the basic lifting plan work point number set: to the number set N 1~ N 4 performing the union operation to generate the basic lifting preliminary work point set N 0; according to the shortest length and minimum interval constraint of the basic lifting continuous operation, supplementing or merging the adjacent work points of the basic lifting preliminary work point, and adjusting the fastener point number corresponding to the supplemented or merged work points i 5 belonging to the number set N 5, and merging with the basic lifting preliminary work point set N 0 to form the basic lifting plan number set N sub ; S7, calculating the collaborative adjustment amount and obtaining the collaborative regulation linear of the foundation lifting and track fine adjustment based on the regulation of line smoothness: the elevation adjustable amount of the fastener AE i , the remaining adjustable amount RAE i and the track irregularity management standard, establishing a regulation of line smoothness collaborative optimization model, determining the objective function f 2 and the second constraint condition, and solving the collaborative adjustment amount according to the optimization theory AD i , so as to obtain the collaborative regulation linear of the foundation lifting and track fine adjustment; S8, evaluating the control effect and iteratively optimizing: the collaborative control line is simulated and evaluated, and the collaborative control line is iteratively adjusted until the line smoothness state meets the management standard, and a collaborative control scheme of foundation lifting and track fine adjustment is obtained; S9, outputting the collaborative control scheme of foundation lifting and track fine adjustment.

2. The smoothness coordinated control method for foundation lifting and track fine adjustment of the ballastless track according to claim 1, characterized in that, In the step S3, the method for measuring the track static geometric position is specifically that: an track detector is used to collect vertical coordinate data of the ballastless track in the basic deformation control interval, to obtain track measured line shape, and to obtain the track static geometric position based on the track measured line shape.

3. The smoothness coordinated control method for lifting the foundation of ballastless track and fine adjusting the track according to claim 1, characterized in that, In the step S5, the construction of the multi-chord optimization model includes the following steps: Step S501, defining an optimization unit composed of adjacent fasteners, the unit length being equal to the maximum length of the detection chord l max ; the deviation of the measured elevation from the design elevation D i decomposition, the decomposition formula is: wherein, MAD i is a minimum threshold adjustment amount, RD i is a remaining elevation deviation amount; Step S502, constructing an objective function f 1, the calculation formula is as follows: In the formula, n is the number of fastener adjustment points in the base deformation control region. Step S503, establishing a first midpoint chord measurement method constraint condition of track irregularity, and the first midpoint chord measurement method constraint condition is: wherein RD q the remaining elevation deviation amount for the start point of the midpoint detection chord, RD z the remaining elevation deviation amount for the end point of the midpoint detection chord, ξ 1 the chord length of the midpoint detection chord l the corresponding midpoint chord measurement management value; Step S504, establishing a first vector difference method constraint condition of track irregularity, and the first vector difference method constraint condition is: In the formula, RDj a remaining height deviation amount of the front side of the fastener adjustment point by half the detection wavelength position, RDh a remaining height deviation amount of the rear side of the fastener adjustment point by half the detection wavelength position; RDs a remaining height deviation amount of the start point of the vector difference detection chord, RDe a remaining height deviation amount of the end point of the vector difference detection chord; k a vector difference calculation coefficient; ξ 2 a chord length of the vector difference detection chord L a corresponding vector difference management value; Step S505, integrating multiple chord lengths l and chord lengths L The corresponding first midpoint chord method constraint condition and first vector difference method constraint condition form the first joint constraint condition of the track irregularity.

4. The smoothness coordinated control method for foundation lifting and track fine adjustment of a ballastless track according to claim 1, characterized in that, In the step S6, the continuous operation shortest length and minimum interval constraint of the foundation lifting is that: the length of the slab-type ballastless track is not less than the length of a single track slab, and the length of the double-block type ballastless track is not less than the length of a single track slab.

5. The smoothness coordinated control method for foundation lifting and track fine adjustment of a ballastless track according to claim 1, characterized in that, In the step S7, the construction of the line smoothness control collaborative optimization model includes the following steps: Step S701, defining an optimization unit composed of adjacent fasteners, the unit length being equal to the maximum length of the detection chord l max ; the deviation of the measured elevation from the design elevation D i Decomposition is carried out, and the decomposition formula is: wherein AD i is the cooperative adjustment amount; RD i is the remaining elevation bias amount; Step S702, constructing an objective function f 2, the calculation formula is as follows: In the formula, α is a linear optimization weight coefficient, used to adjust the emphasis of the optimization objective, and increasing it strengthens the line position recovery, and decreasing it emphasizes the adjustment amount control; δ is a basic lifting point discriminant function, and its value is: Step S703, establishing a second midpoint chord measurement method constraint condition of track irregularity, and the second midpoint chord measurement method constraint condition is: In the formula, P represents the accuracy allowance when the base is lifted, and is 1 mm. Step S704, establishing a second vector difference method constraint condition of track irregularity, and the second vector difference method constraint condition is: Step S705, establishing a fastener collaborative adjustment amount constraint condition, and the fastener collaborative adjustment amount constraint condition is: wherein β is a penalty factor, which takes a positive real number value greater than 1; Step S706, integrating multiple chord lengths l and L The corresponding second midpoint chord measurement constraint condition and the second vector distance difference method constraint condition, and the fastener cooperative adjustment amount constraint condition form the second joint constraint condition of the line smoothness regulation and control cooperation.

6. The smoothness coordinated control method for foundation lifting and track fine adjustment of a ballastless track according to claim 1, characterized in that, The foundation lifting adopts a polyurethane grouting technology.

7. The smoothness coordinated control method for foundation lifting and track fine adjustment of a ballastless track according to claim 1, characterized in that, In the step S9, the collaborative control scheme specifically includes: S901, calculate N sub The number of points in the set of fasteners corresponds to the basic lifting amount of the work point, and the basic lifting amount L i 1 AD i RAE i AE i The fastener adjustment amount F i 1 RAE i AE i All special adjustment fasteners are replaced by regular fasteners;​​​​​ S902, calculating non-mentioned N sub The fastener adjustment point number in the number set corresponds to the fastener adjustment amount of the work point, and the fastener adjustment amount F i 2 = AD i .

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