Tilting-sliding fracture dislocation non-uniform deformation regulation and control structure and regulation and control method thereof

Abstract

The invention discloses a tilt-slip fracture dislocation non-uniform deformation regulation and control structure which comprises a high-strength earthwork standard room and a track structure jacking system. The high-strength earthwork standard rooms are vertically laid in a full-section mode at fixed intervals from the position below the top face of the foundation bed bottom layer; the track structure jacking system is composed of a jacking device, a hydraulic jacking system, a jacking servo control system and a displacement and pressure sensor, and the jacking device is arranged under a sleeper, buried in a ballast bed and used for adjusting the track structure form in real time. The invention further discloses a regulation and control method, total station measurement robots or laser sensors are arranged on the two sides of the roadbed crossing the active fault zone so as to monitor the linear change condition of the track under fault zone dislocation in real time, monitoring data are transmitted to the jacking servo control system in real time, the jacking servo control system controls the hydraulic jacking system, then the jacking device is controlled, and the hydraulic jacking system is controlled to control the jacking device. And in cooperation with a pressure and displacement sensor in the jacking device, instant feedback of a track line shape adjusting result and accurate regulation and control of the track line shape under fracture zone creeping and stick-slip dislocation are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of railway roadbed, and in particular relates to a tilt-slip fracture dislocation uneven deformation control structure and a control method thereof. Background Art

[0002] In actual engineering, active fault zones, due to their significant engineering hazards, have long constrained railway route selection and structural design. Railway lines often circumvent fault zones, but with the increasing demand for railway construction in the complex and dangerous mountainous areas of the southwest and northwest, new railway lines inevitably pass through fault zones. Over the railway's century-long service life, long-term creep slip and co-seismic rapid stick-slip slip in the fault zone will cause uneven deformation and damage to the roadbed, affecting the smoothness of the railway line and posing a severe challenge to railway operation and maintenance. There is an urgent need to develop a method to control the uneven deformation of tilt-slip fault slip. Currently, structures such as geogrids, pile-slab structures, and raft foundations can only resist the deformation of fault zones. These structures have limited deformation control capabilities and cannot effectively regulate fault zone slip that exceeds their bearing capacity.

[0003] The existing technical solutions have the following technical defects: (1) Existing roadbed reinforcement measures are insufficient to resist tilting, sliding, fracture, and deformation Currently, geogrids are widely used to combat dislocation in near-active fault zones. Existing research indicates that geogrids have excellent tensile strength and can improve the horizontal smoothness of lines under strike-slip fault dislocation. However, their vertical bending stiffness is relatively weak. Therefore, geogrids have limited ability to improve the vertical smoothness of lines under long-term creep dislocation of dip-slip faults.

[0004] (2) The traditional railway subgrade structure has a weak ability to control vertical deformation Violent co-seismic stick-slip motion in the dip-slip fault zone is the trigger for surface rupture. Surface rupture is indestructible. Field investigations have shown that dip-slip fault motion can easily cause permanent surface deformations such as step-shaped uplift, compression pushover, and tension collapse. Traditional rigid measures such as pile-slab structures and raft foundations are unable to fully withstand the damage to the roadbed caused by deep and large surface ruptures. Furthermore, once permanent surface deformation occurs, the roadbed undergoes plastic deformation, compromising the smoothness of the railway line. Traditional roadbed structures are unable to quickly restore the roadbed surface to its original state, and their ability to control vertical deformation is weak, making it difficult to effectively control the uneven deformation of the fault zone.

[0005] Therefore, establishing a structure and method for controlling uneven deformation of dip-slip fault dislocation can effectively improve the deformation control efficiency of railway subgrade near active fault zones, which has important practical significance for railways near active faults under construction and planned construction. Summary of the Invention

[0006] In view of this, the present invention provides a structure and method for controlling uneven deformation of tilt-slip fracture dislocation, innovatively proposes a concept for controlling deformation of railway subgrade near fault zones, and forms a railway subgrade deformation control strategy suitable for tilt-slip fracture areas. It no longer relies solely on geogrids or geocells to resist deformation of tilt-slip fracture zones, but uses a jacking servo control system, a hydraulic jacking system and a jacker, combined with displacement and stress monitoring equipment, to accurately control the track line shape during the creep dislocation stage of the fault zone, quickly restore the line to its original state after the stick-slip dislocation of the fault zone, and realize real-time dynamic adjustment of the track structure morphology. Combined with multi-layer high-strength geocells, it controls the position and range of uneven deformation and damage of the subgrade, and weakens the destructive effect of the fault zone dislocation on the sub-track foundation and track structure.

[0007] The first aspect of the present invention is to provide a structure for regulating uneven deformation of a dip-slip fault dislocation, comprising: High-strength geocell (1) and track structure jacking system (2); the high-strength geocell (1) is vertically laid at fixed intervals across the entire section below the top surface of the base bed bottom layer; the track structure jacking system (2) is composed of a jacking device (21), a hydraulic jacking system, a jacking servo control system, and displacement and pressure sensors; the jacking device (21) is arranged directly below the sleeper and buried inside the gravel roadbed for real-time adjustment of the track structure.

[0008] Preferably, each sleeper is equipped with a plurality of jacks (21), the jacks (21) being arranged directly below the sleeper and buried inside the gravel roadbed; the hydraulic jacking system is used to provide jacking power for the jacks (21), and the jacking servo control system is connected to the hydraulic jacking system and is used to directly control the hydraulic jacking system through a lifting control mode; the lifting control mode of the jacking servo control system includes an automatic lifting control mode and a manual lifting control mode.

[0009] Preferably, the jack (21) is a hydraulic jack.

[0010] Preferably, a solid steel shell is provided on the outer side of the jacking device (21) to resist the impact of the roadbed particles on the jacking device (21) under the action of long-term train loads.

[0011] Preferably, the interior of the jack (21) accommodates a secondary hydraulic cylinder (211), and two groups of hydraulic piston assemblies are vertically nested in the cylinder body of the secondary hydraulic cylinder (211). The primary hydraulic piston assembly is at the bottom, and the secondary hydraulic piston assembly is at the top. The total working stroke of the primary and secondary hydraulic pistons is 200 mm. An arc-shaped slide rail (212) is provided below the secondary hydraulic cylinder (211), and the arc-shaped slide rail (212) can be used to adjust the jacking angle within the range of -15° to +15° as needed.

[0012] Preferably, a rotatable support (210) is provided on the top of the jack (21).

[0013] Preferably, the displacement sensor and the pressure sensor are used to monitor the changes in the jacking distance and the jacking pressure in real time during the jacking process of the track structure.

[0014] Preferably, the hydraulic jacking system includes a motor, a hydraulic pump, a hydraulic oil tank and a control valve group; wherein, the motor is connected to the hydraulic pump via a first pipeline accessory, the hydraulic pump is connected to the hydraulic oil tank via a second pipeline accessory, and the control valve group is connected to the hydraulic pump via a third pipeline accessory, and the hydraulic pump outputs high-pressure oil, which enters the secondary hydraulic cylinder (211) through the control valve group to push the primary hydraulic piston and the secondary hydraulic piston.

[0015] The second aspect of the present invention is to provide a method for controlling a tilt-slip fault dislocation uneven deformation control structure, comprising: S1 monitors whether the fault zone is in a long-term creep slip phase or a coseismic rapid stick-slip phase. Compared to geogrids, the bending resistance, vertical friction, and lateral restraint of geocells further enhance the overall toughness and stability of the roadbed structure, preventing concentrated damage and strengthening the roadbed's ability to resist vertical slip deformation.

[0016] S2, the jacking servo control system drives the hydraulic jacking system through a programmable logic controller (PLC) to dynamically adjust the jacking angle, jacking speed and jacking displacement of each jacking device to achieve precise control of the track line shape; S3, deploying total station measurement robots or laser sensors on both sides of the roadbed across the active fault zone to monitor the development of the track line shape under the fault zone displacement in real time, and cooperating with the pressure sensor and displacement sensor in the jacking device to transmit the monitoring data to the jacking servo control system in real time, so as to realize instant feedback of the track line shape adjustment results.

[0017] As a preferred embodiment, the step between S2 and S3 further includes: The elevation of the track structure after the earthquake is accurately measured using a total station or a level, and the measurement results are input into the jacking servo control system. The jacking servo control system automatically calculates the displacement and jacking angle of each jack required to restore the railway line shape, performs elevation compensation operations on the unevenly deformed areas of the track, and realizes the rapid restoration of the geometric line position of the railway after the earthquake.

[0018] This is because after the rapid co-seismic stick-slip movement of the dip-slip fault zone, the geocell smoothed out part of the fault zone displacement, but the track alignment may still change.

[0019] Beneficial effects of the present invention: Compared with traditional railway subgrade deformation control technology near active fault zones, the newly developed tilt-slip fault dislocation uneven deformation control structure and its control method have excellent resistance to fracture vertical dislocation deformation. At the same time, they can quickly adjust the track structure morphology according to needs, facilitating rapid adjustment of railway alignment after creep and stick-slip dislocation of tilt-slip faults, restoring the line to its original state, and facilitating long-term maintenance of inter-seismic railway line smoothness, post-earthquake emergency repair, and rapid reopening. (1) This invention addresses the technical bottleneck of insufficient deformation resistance of the dip-slip fault roadbed structure and innovatively proposes a "geocell + track structure jacking system" strategy for controlling uneven deformation of the dip-slip fault. This effectively improves the roadbed's ability to coordinate and adapt to different rates of fault zone displacement (including slow cumulative deformation and sudden rapid displacement). This is beneficial for the long-term maintenance of inter-seismic railway line smoothness and for post-earthquake emergency repair and rapid reopening of railway lines.

[0020] (2) The present invention provides a structure for controlling uneven deformation of a tilt-slip fault and its control method, which provides an innovative solution for the design and construction of roadbed engineering near active fault zones in complex and dangerous mountainous areas, improves the structural stability of railway roadbeds in areas with strong geological activity, and promotes technological innovation in the field of transportation geotechnical engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of geogrid structure according to the prior art; Figure 2 A schematic diagram of a pile-plate structure according to the prior art; Figure 3 : is a view of a tilt-slip fault dislocation uneven deformation control structure according to an embodiment of the present invention, wherein Figure 3 (a) is a cross-sectional view of the uneven deformation control structure of the dip-slip fault; Figure 3 (b) is the longitudinal section of the uneven deformation control structure of the dip-slip fault; Figure 4 Schematic diagram of the structure and layout of the jacking device according to an embodiment of the present invention; Figure 4 (a) is a cross-sectional view of the jacking structure and layout; Figure 4 (b) is a longitudinal section of the jacking device structure and layout; Figure 5 Schematic diagram of the internal structure of a jacking device according to an embodiment of the present invention; Figure 6 Flowchart of a control method for a tilt-slip fault dislocation uneven deformation control structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0023] like Figure 3 (a) and Figure 3 As shown in (b), this embodiment provides a structure for regulating uneven deformation of a dip-slip fault dislocation, comprising: High-strength geocell 1 and track structure jacking system 2; the high-strength geocell 1 is laid vertically at fixed intervals from the top surface of the base bed bottom layer to the full section; the track structure jacking system 2 is set under the sleepers for real-time adjustment of the track structure shape.

[0024] As a preferred embodiment, the fixed interval is 1.8 m.

[0025] like Figure 4 (a) and Figure 4 As shown in (b), as a preferred embodiment, the track structure jacking system 2 is composed of a jacking device 21, a hydraulic jacking system, a jacking servo control system and a displacement and pressure sensor; the jacking device 21 is arranged directly below the sleeper and buried inside the gravel roadbed, and is used to adjust the track structure shape in real time; each sleeper is equipped with multiple jacking devices 21, the hydraulic jacking system is used to provide jacking power for the jacking device 21, and the jacking servo control system is connected to the hydraulic jacking system, and is used to directly control the hydraulic jacking system through a lifting control mode.

[0026] In this embodiment, the jacking device 21 is a hydraulic jacking device.

[0027] like Figure 5 As shown, as a preferred embodiment, a solid steel shell is provided on the outer side of the jacking device 21 to resist the impact of the roadbed particles on the jacking device 21 under the action of long-term train loads.

[0028] As a preferred embodiment, the jacking device 21 houses a secondary hydraulic cylinder 211, which contains two vertically nested hydraulic piston assemblies. The primary hydraulic piston assembly is located at the bottom, while the secondary hydraulic piston assembly is located at the top. The combined stroke of the primary and secondary hydraulic pistons is 200 mm. A curved slide rail 212 is located below the secondary hydraulic cylinder 211, allowing the lifting angle to be adjusted within a range of -15° to +15° as needed.

[0029] As a preferred embodiment, a rotatable support 210 is provided on the top of the jacking device 21, thereby expanding the contact surface between the jacking device 21 and the sleeper, improving the contact stability between the jacking device 21 and the sleeper, ensuring that the load-bearing requirements of the track system are met, and being able to automatically adjust the support status of sleepers with different inclination angles during the jacking operation.

[0030] The displacement sensor and the pressure sensor are used to monitor the changes in the jacking distance and the jacking pressure in real time during the jacking process of the track structure.

[0031] As a preferred embodiment, the jacking servo control system has an automatic lifting control mode and a manual lifting control mode.

[0032] As a preferred embodiment, the hydraulic jacking system includes a motor, a hydraulic pump, a hydraulic oil tank and a control valve group; wherein, the motor is connected to the hydraulic pump through a first pipeline accessory, the hydraulic pump is connected to the hydraulic oil tank through a second pipeline accessory, and the control valve group is connected to the hydraulic pump through a third pipeline accessory. The hydraulic pump outputs high-pressure oil, which enters the secondary hydraulic cylinder 211 through the control valve group, pushing the primary hydraulic piston and the secondary hydraulic piston. Example 2

[0033] like Figure 6 As shown, this embodiment provides a method for controlling a tilt-slip fault dislocation uneven deformation control structure, comprising: S1: Monitor whether the fault zone is in a long-term creep slip phase or a co-seismic rapid stick-slip phase. Compared to geogrids, the bending resistance, vertical friction, and lateral restraint of geocells further enhance the overall toughness and stability of the roadbed structure, preventing concentrated damage and increasing the roadbed's ability to resist vertical slip deformation. S2, the jacking servo control system drives the hydraulic jacking system through a programmable logic controller (PLC) to dynamically adjust the jacking angle, jacking speed and jacking displacement of each jacking device to achieve precise control of the track line shape; S3, deploying total station measurement robots or laser sensors on both sides of the roadbed across the active fault zone to monitor the development of the track line shape under the fault zone displacement in real time, and cooperating with the pressure sensor and displacement sensor in the jacking device to transmit the monitoring data to the jacking servo control system in real time, so as to realize instant feedback of the track line shape adjustment results.

[0034] As a preferred embodiment, the step between S2 and S3 further includes: The elevation of the track structure after the earthquake is accurately measured using a total station or a level, and the measurement results are input into the jacking servo control system. The jacking servo control system automatically calculates the displacement and jacking angle of each jack required to restore the railway line shape, performs elevation compensation operations on the unevenly deformed areas of the track, and realizes the rapid restoration of the geometric line position of the railway after the earthquake.

[0035] This is because after the rapid co-seismic stick-slip movement of the dip-slip fault zone, the geocell smoothed out part of the fault zone's deformation, but the track alignment may still change dramatically.

[0036] As for the devices and methods of use disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the methods.

[0037] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A structure for regulating uneven deformation of a tilt-slip fault, characterized in that: include: High-strength geocell (1) and track structure jacking system (2); the high-strength geocell (1) is vertically laid at fixed intervals across the entire section below the top surface of the base bed bottom layer; the track structure jacking system (2) is composed of a jacking device (21), a hydraulic jacking system, a jacking servo control system, a displacement sensor, and a pressure sensor; the jacking device (21) is arranged directly below the sleeper and buried inside the gravel roadbed, and is used to adjust the track structure shape in real time.

2. The structure for regulating uneven deformation of a tilt-slip fault according to claim 1, characterized in that: Each sleeper is equipped with a plurality of jacks (21), which are arranged directly below the sleeper and buried inside the gravel roadbed; the hydraulic jacking system is used to provide jacking power for the jacks (21); the jacking servo control system is connected to the hydraulic jacking system and is used to directly control the hydraulic jacking system through a lifting control mode; the lifting control mode of the jacking servo control system includes an automatic lifting control mode and a manual lifting control mode.

3. The structure for regulating uneven deformation of a tilt-slip fault according to claim 2, characterized in that: The jacking device (21) is a hydraulic jacking device.

4. The tilt-slip fault dislocation uneven deformation control structure according to claim 3, characterized in that: A solid steel shell is provided on the outer side of the jacking device (21) to resist the impact of the roadbed particles on the jacking device (21) under the action of long-term train loads.

5. The structure for regulating uneven deformation of a tilt-slip fault according to claim 4, characterized in that: The jacking device (21) contains a secondary hydraulic oil cylinder (211) inside, and two sets of hydraulic piston assemblies are vertically nested in the cylinder body of the secondary hydraulic oil cylinder (211). The primary hydraulic piston assembly is at the bottom, and the secondary hydraulic piston assembly is at the top. The total working stroke of the primary and secondary hydraulic pistons is 200 mm. An arc-shaped slide rail (212) is provided below the secondary hydraulic oil cylinder (211). The arc-shaped slide rail (212) can be used to adjust the jacking angle within the range of -15° to +15° as needed.

6. The tilt-slip fault dislocation uneven deformation control structure according to claim 5, characterized in that: A rotatable support (210) is provided on the top of the jack (21).

7. The tilt-slip fault dislocation uneven deformation control structure according to claim 6, characterized in that: The displacement sensor and the pressure sensor are used to monitor the changes in the jacking distance and the jacking pressure in real time during the jacking process of the track structure.

8. The tilt-slip fault dislocation uneven deformation control structure according to claim 7, characterized in that: The hydraulic jacking system includes a motor, a hydraulic pump, a hydraulic oil tank and a control valve group; wherein the motor is connected to the hydraulic pump via a first pipeline accessory, the hydraulic pump is connected to the hydraulic oil tank via a second pipeline accessory, and the control valve group is connected to the hydraulic pump via a third pipeline accessory. The hydraulic pump outputs high-pressure oil, which enters the secondary hydraulic cylinder (211) through the control valve group to push the primary hydraulic piston and the secondary hydraulic piston.

9. A control method for a tilt-slip fracture dislocation uneven deformation control structure according to any one of claims 1 to 8, characterized in that: include: S1, monitor whether the fault zone is in the long-term creep slip stage or the coseismic rapid stick-slip stage; S2, the jacking servo control system drives the hydraulic jacking system through a programmable logic controller to dynamically adjust the jacking angle, jacking speed and jacking displacement of each jack to achieve precise control of the track line shape; S3, deploying total station measurement robots or laser sensors on both sides of the roadbed across the active fault zone to monitor the development of the track line shape under the fault zone displacement in real time, and cooperating with the pressure sensor and displacement sensor in the jacking device to transmit the monitoring data to the jacking servo control system in real time, so as to realize instant feedback of the track line shape adjustment results.

10. The control method according to claim 9, characterized in that: The S2 and S3 also include: The elevation of the track structure after the earthquake is accurately measured using a total station or a level, and the measurement results are input into the jacking servo control system. The jacking servo control system automatically calculates the displacement and jacking angle of each jack required to restore the railway line shape, performs elevation compensation operations on the unevenly deformed areas of the track, and realizes the rapid restoration of the geometric line position of the railway after the earthquake.

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