Bidirectional corrugated plate for underground yielding supporting structure and forming device of bidirectional corrugated plate

Abstract

The invention relates to a bidirectional corrugated plate for an underground yielding support structure and a forming device thereof, the bidirectional corrugated plate comprises a plate body, longitudinal corrugations and transverse corrugations which are mutually vertically distributed are arranged on the plate body, and wave crests and wave troughs of the longitudinal corrugations and the transverse corrugations are continuously and alternately arranged to form a corrugated structure with balanced bidirectional rigidity. The forming device comprises a longitudinal wave forming device and a transverse wave forming device which are integrally connected through a fixed rack. The longitudinal wave forming device comprises a longitudinal large-wave roller, a conveying roller and a lifting mechanism; the transverse wave forming device comprises a transverse large wave-shaped roller, a sliding baffle and a small wave-shaped roller. The two-way corrugated plate can effectively solve the problem that the two-way rigidity difference of a traditional one-way corrugated plate is too large, the two-way rigidity of the plate is balanced, the ideal two-way corrugated plate can be obtained by presetting the longitudinal waveform and the transverse waveform and automatically adjusting the waveform roller to the correct position through the lifting mechanism, and the operation process is simple.

Description

Technical Field

[0001] The present invention relates to the technical fields of tunnel support structures and machining, and particularly to a bidirectional corrugated plate for an underground yielding support structure and a forming device thereof. Background Art

[0002] Compared with ordinary flat structures, corrugated plate structures have greater stiffness and are not easily deformed beyond the limit, making them suitable for the construction environment of high stress and large deformation in underground engineering. Currently, as the excavation depth of tunnels continues to increase, the surrounding rock pressure on the support structure also continues to increase. Especially in areas of surrounding rock with large deformation, traditional support structures are prone to excessive deformation due to excessive loads, causing the overall support structure to yield and fail. Therefore, yielding support structures are often used in engineering to reduce the pressure load.

[0003] However, most of the corrugated plates used in current underground yielding support structures are unidirectionally corrugated, with a large difference in stiffness in two directions. After being stressed, they are prone to tensile or compressive deformation along the direction perpendicular to the corrugations. The overall impact resistance and coordinated deformation ability are poor, and it is difficult to accurately control the deformation position of the yielding support structure.

[0004] In the existing technical solution, the application publication number is: CN115596466A, a buffer yielding composite support structure and support method for soft surrounding rock tunnels, which uses a corrugated plate structure for the buffer support and strengthening support parts in its yielding support structure. The corrugated plate structures in the said utility model applications are all unidirectional corrugated plates. Using unidirectional corrugated plates has the disadvantages of large bidirectional stiffness differences; being prone to tensile or compressive deformation along the direction perpendicular to the corrugations after being stressed; poor overall impact resistance and coordinated deformation ability; difficult to control the yielding deformation position; and difficult to control the yielding deformation distance. Summary of the Invention

[0005] To solve the above technical problems, the object of the present invention is to provide a bidirectional corrugated plate for an underground yielding support structure and a forming device thereof. The specific technical solutions are as follows:

[0006] A bidirectional corrugated plate for an underground yielding support structure, including a plate body, wherein longitudinal corrugations and transverse corrugations are arranged perpendicular to each other on the plate body; the crests and troughs of the longitudinal corrugations and transverse corrugations are continuously and alternately arranged to form a corrugated structure with balanced bidirectional stiffness.

[0007] In the preferred embodiment of the bidirectional corrugated plate for an underground yielding support structure, the sizes of the longitudinal corrugations and transverse corrugations are adjusted according to engineering requirements to control the yielding deformation area and the maximum allowable deformation distance.

[0008] For the two-way corrugated plate used in the underground yielding support structure, in its preferred embodiment, connection interfaces are provided at both ends of the plate body for fixed connection with the one-way corrugated plate or adjacent two-way corrugated plates by bolts or welding, so that the one-way corrugated plate bears the subsequent load after yielding deformation.

[0009] A forming device for the two-way corrugated plate used in the underground yielding support structure includes a longitudinal corrugating device and a transverse corrugating device, which are integrally connected through a fixed frame.

[0010] The longitudinal corrugating device includes a longitudinal large-wave corrugating roll, a conveying roll and a lifting mechanism.

[0011] In the longitudinal corrugating device, at least a pair of longitudinally large-wave corrugating rolls are symmetrically arranged up and down, and grooves matching the longitudinal corrugations are provided on the surface of the longitudinally large-wave corrugating rolls.

[0012] The conveying roll is used to uniformly feed the sheet into the longitudinal corrugating device.

[0013] The lifting mechanism is arranged on the fixed frame and is connected to the upper half of the longitudinal large-wave corrugating roll, and is used to adjust the distance between the upper and lower rolls to achieve multi-pass synchronous forming.

[0014] The transverse corrugating device includes a transverse large-wave corrugating roll, a sliding baffle and a small-wave corrugating roll.

[0015] In the transverse corrugating device, at least a pair of transversely large-wave corrugating rolls are symmetrically arranged up and down, and grooves matching the transverse corrugations are provided on their surfaces.

[0016] The sliding baffle is arranged at the inlet end of the transverse corrugating device and is used to position the starting position of the transverse bending of the sheet.

[0017] The small-wave corrugating rolls are symmetrically arranged above both sides of the sheet and are used to limit the warping of the sheet during the transverse bending process.

[0018] For the forming device of the two-way corrugated plate used in the underground yielding support structure, in its preferred embodiment, the groove depth of the longitudinal large-wave corrugating roll and the transverse large-wave corrugating roll is consistent with the corrugation wave height, and the surfaces of the rolls all adopt a detachable modular design, and the corrugation parameters are adjusted by replacing roll modules of different sizes.

[0019] For the forming device of the two-way corrugated plate used in the underground yielding support structure, in its preferred embodiment, the lifting mechanism includes a lifting support shaft, a guide plate and a rotator, the rotator is embedded in the lifting mechanism and is connected to the electric drive system.

[0020] Fix both ends of the longitudinal large corrugated roll in the rotator. The rotator rotates with electricity as the power source, driving the generation of frictional force between the longitudinal large corrugated roll and the sheet. Under the action of the frictional force, the sheet forms rotational and lifting motions.

[0021] In the preferred embodiment of the forming device for the bidirectional corrugated sheet of an underground yielding support structure, in the transverse corrugating device, the downward pressing stroke of the upper half of the transverse large corrugated roll is controlled by a preset program, and the position of the sliding baffle can be horizontally adjusted along the fixed frame to meet the transverse bending requirements of sheets with different lengths.

[0022] In the preferred embodiment of the forming device for the bidirectional corrugated sheet of an underground yielding support structure, the longitudinal corrugating device adopts a simultaneous pass design system. All longitudinal corrugations in the same cross-section are synchronously formed in one rolling process, and the distance between the upper and lower rolls is gradually reduced by the downhill method to improve the forming accuracy.

[0023] In the preferred embodiment of the forming device for the bidirectional corrugated sheet of an underground yielding support structure, the preparation of the bidirectional corrugated sheet by the forming device includes the following steps:

[0024] Step 1: Feed the sheet into the longitudinal corrugating device through the conveyor roller, adjust the lifting mechanism to gradually press down the upper half of the large longitudinal corrugated roll, and complete the multi-pass synchronous forming of the longitudinal corrugations.

[0025] Step 2: Feed the longitudinally formed sheet into the transverse corrugating device, position the front end of the sheet through the sliding baffle, start the downward pressing of the transverse large corrugated roll to the preset stroke, and at the same time limit the warping of the sheet through the small corrugated roll to complete the bending forming of the transverse corrugations.

[0026] Step 3: Trim the edges and process the joints of the formed bidirectional corrugated sheet to obtain the final product.

[0027] In the preferred embodiment of the forming device for the bidirectional corrugated sheet of an underground yielding support structure, in Step 1, during the longitudinal corrugating process, the rotational speeds of the longitudinal large corrugated rolls in different passes increase to improve the tension and accuracy of the longitudinal forming of the sheet.

[0028] Beneficial effects

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] (1) The bidirectional corrugated sheet proposed by the present invention can effectively solve the problem of too large a difference in the bidirectional stiffness of traditional unidirectional corrugated sheets, make the bidirectional stiffness of the sheet balanced, effectively improve the overall impact resistance and coordinated deformation ability of the sheet, and can meet the construction environment of high stress and large deformation in underground engineering;

[0031] (2) The described double-sided corrugated plate, with its unique double-sided corrugated design, has relatively stable double-sided deformation ability. When using the double-sided corrugated plate of the present invention in a yielding support structure, according to the actual engineering needs, it can effectively control its yielding deformation area and limit the yielding distance, effectively controlling the deformation amount and deformation rate of the surrounding rock, thereby releasing the surrounding rock load and preventing the support structure from being crushed.

[0032] (3) The described double-sided corrugated plate forming device is set with the longitudinal corrugating device and the transverse corrugating device integrally formed, with a simple and beautiful appearance. By presetting the longitudinal waveform and the transverse waveform, and automatically adjusting the waveform rollers to the correct position through the lifting mechanism, an ideal double-sided corrugated plate can be obtained, and the operation process is simple.

[0033] (4) The longitudinal corrugating device adopts a combination of a simultaneous hole pattern design system and the downhill method to simultaneously form the longitudinal corrugations of the plate, reducing both the time cost and the economic cost. Moreover, the waveform rollers are all designed to be detachable and replaceable. When a waveform roller is damaged, only the corresponding one needs to be replaced, reducing the maintenance cost. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the double-sided corrugated plate;

[0035] Figure 2 It is a schematic diagram of the double-sided corrugated plate and its forming device;

[0036] Figure 3 It is for Figure 2 The A-A sectional view of the double-sided corrugated plate forming device in

[0037] Figure 4 It is a schematic diagram of the longitudinal corrugating process;

[0038] Figure 5 It is a schematic diagram of the transverse corrugating process;

[0039] Figure 6 It is a sectional view of the lifting mechanism;

[0040] Figure 7 It is a schematic diagram of the longitudinal large waveform roller and the transverse large waveform roller;

[0041] Figure 8 It is a schematic diagram of the double-sided corrugated plate used in the tunnel yielding support structure.

[0042] In the figure: 1. Plate body, 101. Longitudinal corrugation, 102. Transverse corrugation, 103. Connection interface, 2. Longitudinal large waveform roller, 3. Small waveform roller, 4. Conveyor roller, 5. Fixed frame, 6. Lifting mechanism, 601. Lifting support shaft, 602. Guide plate, 603. Rotator, 7. Sliding baffle, 8. Transverse large waveform roller. Detailed Embodiment

[0043] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0044] As Figure 1-8 shown, a bidirectional corrugated plate for an underground yielding support structure includes a plate body 1, and longitudinal corrugations 101 and transverse corrugations 102 are arranged perpendicular to each other on the plate body 1; the wave crests and wave troughs of the longitudinal corrugations 101 and the transverse corrugations 102 are continuously and alternately arranged to form a corrugated structure with balanced bidirectional stiffness.

[0045] The sizes of the longitudinal corrugations 101 and the transverse corrugations 102 are adjusted according to engineering requirements to control the yielding deformation area and the maximum allowable deformation distance.

[0046] Both ends of the plate body 1 are provided with connection interfaces 103 for fixedly connecting with a unidirectional corrugated plate or an adjacent bidirectional corrugated plate by bolts or welding, so that the unidirectional corrugated plate bears the subsequent load after yielding deformation.

[0047] A forming device for a bidirectional corrugated plate for an underground yielding support structure includes a longitudinal corrugating device and a transverse corrugating device, and the two are integrally connected through a fixed frame 5;

[0048] The longitudinal corrugating device includes a longitudinal large corrugation roller 2, a conveying roller 4 and a lifting mechanism 6;

[0049] At least a pair of longitudinally large corrugation rollers 2 symmetrically arranged up and down are provided in the longitudinal corrugating device, and grooves matching the longitudinal corrugations 101 are provided on the surface of the longitudinal large corrugation roller 2;

[0050] The conveying roller 4 is used for feeding the plate material into the longitudinal corrugating device at a constant speed;

[0051] The lifting mechanism 6 is arranged on the fixed frame 5 and is connected to the upper half of the longitudinal large corrugation roller 2 for adjusting the distance between the upper and lower rollers to achieve multi-pass synchronous forming;

[0052] The transverse corrugating device includes a transverse large corrugation roller 8, a sliding baffle 7 and a small corrugation roller 3;

[0053] At least a pair of transversely large corrugation rollers 8 symmetrically arranged up and down are provided in the transverse corrugating device, and grooves matching the transverse corrugations 102 are provided on the surface of the transverse large corrugation roller 8;

[0054] The sliding baffle 7 is arranged at the inlet end of the transverse corrugating device for positioning the starting position of the transverse bending of the plate material;

[0055] The small corrugated rollers 3 are symmetrically arranged above both sides of the plate and are used to limit the warping of the plate during the transverse bending process.

[0056] The groove depth of the longitudinal large corrugated roller 2 and the transverse large corrugated roller 8 is consistent with the corrugation wave height, and the surfaces of the rollers are all designed in a detachable modular manner. The corrugation parameters are adjusted by replacing roller modules of different sizes.

[0057] The lifting mechanism 6 includes a lifting support shaft 601, a guide plate 602 and a rotator 603. The rotator 603 is embedded in the lifting mechanism 6 and is connected to the electric drive system;

[0058] Both ends of the longitudinal large corrugated roller 2 are fixed in the rotator 603. The rotator 603 rotates with electricity as the power source, driving the generation of frictional force between the longitudinal large corrugated roller 2 and the plate. The plate forms rotational and lifting movements under the action of the frictional force.

[0059] In the transverse corrugating device, the downward pressing stroke of the upper half of the transverse large corrugated roller 8 is controlled by a preset program, and the position of the sliding baffle 7 can be horizontally adjusted along the fixed frame 5 to meet the transverse bending requirements of plates of different lengths.

[0060] The longitudinal corrugating device adopts a simultaneous pass design system. All the longitudinal corrugations 101 in the same cross-section are formed synchronously during a single rolling process, and the distance between the upper and lower rollers is gradually reduced by the downhill method to improve the forming accuracy.

[0061] Preparing a double-sided corrugated plate by the forming device includes the following steps:

[0062] Step 1: Feed the plate into the longitudinal corrugating device through the conveyor roller 4, adjust the lifting mechanism 6 to gradually press down the upper half of the large longitudinal corrugated roller 2, and complete the multi-pass synchronous forming of the longitudinal corrugations 101;

[0063] Step 2: Feed the longitudinally formed plate into the transverse corrugating device, position the front end of the plate through the sliding baffle 7, start the transverse large corrugated roller 8 to press down to the preset stroke, and at the same time limit the warping of the plate through the corrugated small rollers 3 to complete the bending forming of the transverse corrugations 102;

[0064] Step 3: Trim the edges and process the joints of the formed double-sided corrugated plate to obtain the final product.

[0065] In Step 1, during the longitudinal corrugating process, the rotational speed of the longitudinal large corrugated roller 2 in different passes increases to improve the tension and accuracy of the longitudinal forming of the plate.

[0066] The above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A bidirectional corrugated plate for underground yielding support structure, characterized in that: The invention comprises a plate body (1), on which longitudinal corrugations (101) and transverse corrugations (102) which are vertically distributed to each other are arranged; the crests and troughs of the longitudinal corrugations (101) and the transverse corrugations (102) are continuously and alternately arranged to form a corrugated structure with balanced bidirectional stiffness.

2. The bidirectional corrugated plate for underground pressure relief support structure according to claim 1, characterized in that: The sizes of the longitudinal corrugations (101) and the transverse corrugations (102) are adjusted according to engineering requirements to control the pressure-yielding deformation area and the maximum allowable deformation distance.

3. The bidirectional corrugated plate for underground pressure relief support structure according to claim 1, characterized in that: The plate body (1) is provided with connection interfaces (103) at both ends thereof, which are used to be fixedly connected with the one-way corrugated plate or the adjacent two-way corrugated plate by bolts or welding, so that the one-way corrugated plate can bear subsequent loads after compression deformation.

4. A forming device for a bidirectional corrugated plate for an underground yield support structure according to any one of claims 1 to 3, characterized in that: It comprises a longitudinal wave forming device and a transverse wave forming device, which are integrally connected via a fixed frame (5); The longitudinal wave forming device comprises a longitudinal large wave rolling roller (2), a conveying roller (4) and a lifting mechanism (6); The longitudinal corrugation device comprises at least one pair of longitudinal large corrugated rollers (2) symmetrically arranged up and down, wherein the surface of the longitudinal large corrugated rollers (2) is provided with grooves matching the longitudinal corrugations (101); The conveying roller (4) is used to convey the plate into the longitudinal corrugation device at a uniform speed; The lifting mechanism (6) is arranged on the fixed frame (5), connected to the upper longitudinal large corrugated roller (2), and is used to adjust the distance between the upper and lower rollers to achieve multi-pass synchronous forming; The transverse corrugation device comprises a transverse large corrugated roller (8), a sliding baffle (7) and a small corrugated roller (3); The transverse corrugation device comprises at least one pair of transverse large corrugated rollers (8) symmetrically arranged up and down, and grooves matching the transverse corrugations (102) are provided on the surface of the rollers; The sliding baffle (7) is arranged at the inlet end of the transverse wave forming device and is used to locate the starting position of the transverse bending of the plate; The small corrugated rollers (3) are symmetrically arranged above both sides of the plate and are used to limit the warping of the plate during the transverse bending process; The longitudinal large corrugated roller (2) and the transverse large corrugated roller (8) have the same structure.

5. The forming device of the bidirectional corrugated plate for underground pressure relief support structure according to claim 4, characterized in that: The groove depth of the longitudinal large corrugated roller (2) and the transverse large corrugated roller (8) is consistent with the corrugation height, and the roller surfaces are designed to be detachable and modular, and the corrugation parameters can be adjusted by replacing roller modules of different sizes.

6. The forming device of the bidirectional corrugated plate for underground pressure relief support structure according to claim 4, characterized in that: The lifting mechanism (6) comprises a lifting support shaft (601), a guide plate (602) and a rotator (603); the rotator (603) is embedded in the lifting mechanism (6) and connected to the electric drive system; The two ends of the longitudinal large corrugated roller (2) are fixed in a rotator (603), and the rotator (603) is rotated by using electricity as a power source, driving the longitudinal large corrugated roller (2) and the plate to generate friction force, and the plate forms a rotation and lifting motion under the action of the friction force.

7. The forming device of the bidirectional corrugated plate for underground pressure relief support structure according to claim 4, characterized in that: In the transverse corrugation device, the downward pressing stroke of the upper transverse large corrugated roller (8) is controlled by a preset program, and the position of the sliding baffle (7) can be adjusted horizontally along the fixed frame (5) to meet the transverse bending requirements of plates of different lengths.

8. The forming device of the bidirectional corrugated plate for underground yield support structure according to claim 4, characterized in that: The longitudinal corrugation device adopts a simultaneous hole design system, so that all longitudinal corrugations (101) of the same cross section are synchronously formed in one rolling process, and the distance between the upper and lower rollers is gradually reduced by a downhill method to improve the forming accuracy.

9. The forming device of the bidirectional corrugated plate for underground yield support structure according to claim 4, characterized in that: The preparation of a bidirectional corrugated board by a forming device comprises the following steps: Step 1: Send the plate into the longitudinal corrugation device through the conveying roller (4), adjust the lifting mechanism (6) to gradually press the upper large longitudinal corrugated roller (2) downward to complete the multi-pass synchronous forming of the longitudinal corrugations (101); Step 2: Feed the longitudinally formed sheet into the transverse corrugation device, position the front end of the sheet by means of a sliding baffle (7), start the transverse large corrugated roller (8) to press down to a preset stroke, and at the same time limit the warping of the sheet by means of the small corrugated roller (3), thereby completing the bending and forming of the transverse corrugations (102); Step 3: Perform trimming and interface processing on the formed bidirectional corrugated plate to obtain the final product.

10. A forming device for a bidirectional corrugated plate for an underground yield support structure according to claim 9, characterized in that: In step one, during the longitudinal corrugation process, the rotation speed of the longitudinal large corrugated roller (2) of different passes is increased gradually to improve the tension and precision of the longitudinal forming of the plate.

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