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

Abstract

The utility model 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, the plate body is provided with longitudinal corrugations and transverse corrugations which are mutually and vertically distributed, 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 utility model relates to tunnel support structure technology and mechanical processing field, especially a kind of bidirectional corrugated sheet for underground yielding support structure and its forming device. BACKGROUND

[0002] Compared with ordinary flat structure, the corrugated sheet structure has greater stiffness and is not easy to deform out of limit, and is suitable for high stress and large deformation construction environment of underground engineering. At present, with the increasing excavation depth of tunnel, the surrounding rock pressure on support structure is also increasing. Especially in the large deformation surrounding rock area, the traditional support structure is easy to produce deformation out of limit due to excessive load, so that the overall support structure yields and fails. Therefore, yielding support structure is often used in engineering to reduce pressure load.

[0003] However, the corrugated sheet used in current underground yielding support structure is mostly one-way wave, and the stiffness difference in two directions is large, and it is easy to produce tensile or compressive deformation perpendicular to the corrugated direction after being stressed, and 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] The prior art, application publication number: CN115596466A for soft surrounding rock tunnel buffer yielding composite support structure and support method, uses corrugated sheet structure for the buffer support and reinforcement support part in its yielding support structure. The corrugated sheet structure in the utility model application, is a one-way corrugated sheet. Using one-way corrugated sheet has the disadvantages of large two-way stiffness difference; easy to produce tensile or compressive deformation perpendicular to the corrugated direction after being stressed; poor overall impact resistance and coordinated deformation ability; difficult to control the yielding deformation position; difficult to control the yielding deformation distance. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the purpose of the utility model is to provide a bidirectional corrugated sheet for underground yielding support structure and its forming device, and the specific technical scheme is as follows:

[0006] A bidirectional corrugated sheet for underground yielding support structure, comprising a plate body, the plate body is provided with longitudinal corrugations and transverse corrugations distributed perpendicular to each other; the wave crests and wave troughs of the longitudinal corrugations and the transverse corrugations are continuously and alternately arranged, forming a bidirectional stiffness balanced corrugated structure;

[0007] The preferred scheme of the bidirectional corrugated sheet for underground yielding support structure is that the size of the longitudinal corrugations and the transverse corrugations is adjusted according to engineering requirements to control the yielding deformation area and the maximum allowable deformation distance;

[0008] The two-way corrugated plate for the underground pressure-released supporting structure is preferably provided with connecting interfaces at both ends of the plate body, which are used to be fixedly connected with one-way corrugated plates or adjacent two-way corrugated plates through bolts or welding, so that the one-way corrugated plates bear subsequent loads after pressure-released deformation;

[0009] The forming device for the two-way corrugated plate for the underground pressure-released supporting structure comprises a longitudinal wave forming device and a transverse wave forming device, which are integrally connected through a fixed frame;

[0010] The longitudinal wave forming device comprises longitudinal large wave forming rollers, conveying rollers and a lifting mechanism;

[0011] At least one pair of the longitudinal large wave forming rollers arranged symmetrically upwards and downwards in the longitudinal wave forming device are provided with grooves matched with longitudinal corrugations on surfaces of the rollers;

[0012] The conveying rollers are used to uniformly feed the plate into the longitudinal wave forming device;

[0013] The lifting mechanism arranged on the fixed frame is connected with the upper longitudinal large wave forming rollers and used to adjust the distance between the upper and lower rollers to realize multi-pass synchronous forming;

[0014] The transverse wave forming device comprises transverse large wave forming rollers, sliding baffles and small wave forming rollers;

[0015] At least one pair of the transverse large wave forming rollers arranged symmetrically upwards and downwards in the transverse wave forming device are provided with grooves matched with transverse corrugations on surfaces of the rollers;

[0016] The sliding baffles are arranged at an entrance end of the transverse wave forming device and used to position the starting position of the transverse bending of the plate;

[0017] The small wave forming rollers are symmetrically arranged above both sides of the plate and used to limit the warping of the plate in the transverse bending process;

[0018] The forming device for the two-way corrugated plate for the underground pressure-released supporting structure is preferably provided with the grooves in the longitudinal large wave forming rollers and the transverse large wave forming rollers, the depths of the grooves are consistent with the corrugation heights, and the surfaces of the rollers are designed in a detachable and modularized manner, so that the corrugation parameters are adjusted by replacing rollers of different sizes;

[0019] The forming device for the two-way corrugated plate for the underground pressure-released supporting structure is preferably provided with the lifting mechanism comprising lifting support shafts, guide plates and rotators, the rotators are embedded in the lifting mechanism and connected with a power driving system;

[0020] The two ends of the longitudinal large wave-shaped roller are fixed in a rotator, the rotator is rotated by power as a power source, friction between the longitudinal large wave-shaped roller and the plate is generated, and the plate is formed in rotation and lifting motion under the action of the friction;

[0021] The preferred form of the forming device for the bidirectional corrugated plate of the underground yielding support structure is that the downward stroke of the upper half longitudinal large wave-shaped roller in the transverse wave forming device is controlled by a preset program, and the position of the sliding baffle can be adjusted horizontally along the fixed frame to adapt to the transverse bending requirement of plates of different lengths.

[0022] The preferred form of the forming device for the bidirectional corrugated plate of the underground yielding support structure is that the longitudinal wave forming device adopts a simultaneous groove design system, all longitudinal corrugations in the same section are simultaneously formed in one rolling process, and the spacing between the upper and lower rollers is gradually reduced by the down-slope method to improve the forming precision.

[0023] A method for preparing a bidirectional corrugated plate by using the forming device comprises the following steps:

[0024] Step one: the plate is sent into the longitudinal wave forming device through the conveying roller, the lifting mechanism is adjusted to make the upper half longitudinal large wave-shaped roller gradually press down, and the multi-pass simultaneous forming of the longitudinal corrugation is completed.

[0025] Step two: the longitudinally formed plate is sent into the transverse wave forming device, the front end of the plate is positioned by the sliding baffle, the transverse large wave-shaped roller is started to press down to a preset stroke, and the plate is limited from warping by the wave-shaped small roller, and the bending forming of the transverse corrugation is completed.

[0026] Step three: the formed bidirectional corrugated plate is edge cut and interface processed to obtain the final product.

[0027] In step one, the rotation speed of the longitudinal large wave-shaped roller in different passes is increased during the longitudinal wave forming process, so as to improve the tension and precision of the longitudinal forming of the plate.

[0028] Advantages

[0029] Compared with the prior art, the bidirectional corrugated plate has the advantages that:

[0030] (1) The bidirectional corrugated plate can effectively solve the problem of large difference between the bidirectional stiffness of the traditional unidirectional corrugated plate, balance the bidirectional stiffness of the plate, effectively improve the overall impact resistance and coordinated deformation capacity of the plate, and meet the construction environment of high stress and large deformation in underground engineering.

[0031] (2) The unique bidirectional corrugated design of the bidirectional corrugated plate has stable bidirectional deformation capacity, in the pressure relief supporting structure, the bidirectional corrugated plate can effectively control the pressure relief deformation area and limit the pressure relief distance according to the actual engineering needs, effectively control the deformation amount and deformation rate of the surrounding rock, thereby releasing the surrounding rock load and avoiding the collapse of the supporting structure;

[0032] (3) The bidirectional corrugated plate forming device is integrally formed with the longitudinal wave forming device and the transverse wave forming device, and has simple and beautiful appearance. By presetting the longitudinal wave and the transverse wave, the wave-shaped roller is automatically adjusted to the correct position through the lifting mechanism, so that the ideal bidirectional corrugated plate is obtained, and the operation process is simple;

[0033] (4) The longitudinal wave forming device adopts a mode combining a simultaneous pass design system and a downhill method to simultaneously form the longitudinal corrugation of the plate, thereby reducing the time cost and the economic cost. The wave-shaped rollers are detachably designed, and only need to be replaced in a targeted manner when the wave-shaped rollers are damaged, thereby reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a schematic view of the bidirectional corrugated plate;

[0035] Figure 2 It is a schematic view of the bidirectional corrugated plate and the forming device thereof;

[0036] Figure 3 It is Figure 2 It is an A-A sectional view of the bidirectional corrugated plate forming device;

[0037] Figure 4 It is a longitudinal wave forming process schematic view;

[0038] Figure 5 It is a transverse wave forming process schematic view;

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

[0040] Figure 7 It is a schematic view of the longitudinal large wave-shaped roller and the transverse large wave-shaped roller;

[0041] Figure 8 It is a schematic view of the bidirectional corrugated plate used for the tunnel pressure relief supporting structure.

[0042] In the drawing: 1, plate body, 101, longitudinal corrugation, 102, transverse corrugation, 103, connecting interface, 2, longitudinal large wave-shaped roller, 3, small wave-shaped roller, 4, conveying roller, 5, fixed rack, 6, lifting mechanism, 601, lifting support shaft, 602, guide plate, 603, rotator, 7, sliding baffle, 8, transverse large wave-shaped roller. DETAILED DESCRIPTION

[0043] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0044] like Figures 1-8 As shown, a bidirectional corrugated plate for underground pressure relief support structure includes a plate body 1, on which longitudinal corrugations 101 and transverse corrugations 102 are arranged perpendicularly to each other; the crests and troughs of the longitudinal corrugations 101 and the transverse corrugations 102 are continuously alternated to form a bidirectional stiffness balanced corrugated structure.

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

[0046] The plate 1 has connection interfaces 103 at both ends, which are used to fix and connect with the unidirectional corrugated plate or the adjacent bidirectional corrugated plate by bolts or welding, so that the unidirectional corrugated plate can bear the subsequent load after the pressure deformation.

[0047] A forming device for a bidirectional corrugated plate for underground pressure relief support structure includes a longitudinal corrugating device and a transverse corrugating device, which are integrally connected by a fixed frame 5.

[0048] The longitudinal wave-forming device includes a longitudinal large-wave roll 2, a conveying roll 4, and a lifting mechanism 6;

[0049] The longitudinal wave-forming device includes at least one pair of longitudinal large-wave rolls 2 arranged symmetrically in the upper and lower parts, and the surface of the longitudinal large-wave rolls 2 is provided with grooves that match the longitudinal corrugations 101.

[0050] The conveying roller 4 is used to feed the plate into the longitudinal wave-forming device at a uniform speed.

[0051] The lifting mechanism 6 is mounted on the fixed frame 5 and connected to the upper longitudinal large wave roll 2. It is used to adjust the gap between the upper and lower rolls to achieve multi-pass synchronous forming.

[0052] The transverse wave-forming device includes a transverse large-wave roll 8, a sliding baffle 7, and a small-wave roll 3;

[0053] The transverse wave forming device has at least one pair of transverse large wave rolls 8 arranged symmetrically in the upper and lower parts, and the surface of the rolls is provided with grooves that match the transverse waves 102.

[0054] The sliding baffle 7 is located at the inlet end of the transverse wave-forming device and is used to position the starting position of the transverse bending of the plate.

[0055] The small wave-shaped roller 3 is symmetrically arranged above the two sides of the plate and is used to limit the warping of the plate during the transverse bending process.

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

[0057] 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 is connected with the electric drive system;

[0058] The two ends of the longitudinal large wave-shaped roller 2 are fixed in the rotator 603, the rotator 603 is rotated by using electricity as a power source to drive the friction between the longitudinal large wave-shaped roller 2 and the plate, and the plate forms a rotating and lifting motion under the action of the friction.

[0059] In the transverse wave forming device, the pressing stroke of the upper half transverse large wave-shaped roller 8 is controlled by a preset program, and the position of the sliding baffle 7 can be adjusted horizontally along the fixed rack 5 to adapt to the transverse bending requirements of plates of different lengths.

[0060] The longitudinal wave forming device adopts a simultaneous groove design system, and all longitudinal corrugations 101 in the same section are simultaneously formed in one rolling process, and the distance between the upper and lower rollers is gradually reduced by the down-slope method to improve the forming precision.

[0061] The preparation of the bidirectional corrugated plate by the forming device comprises the following steps:

[0062] Step one: the plate is sent into the longitudinal wave forming device through the conveying roller 4, the lifting mechanism 6 is adjusted to make the upper half large longitudinal wave-shaped roller 2 press down gradually, and the multi-pass synchronous forming of the longitudinal corrugation 101 is completed;

[0063] Step two: the longitudinally formed plate is sent into the transverse wave forming device, the front end of the plate is positioned by the sliding baffle 7, the transverse large wave-shaped roller 8 is started to press down to a preset stroke, and the plate warping is limited by the small wave-shaped roller 3, and the bending forming of the transverse corrugation 102 is completed;

[0064] Step three: the formed bidirectional corrugated plate is edge cut and interface processed to obtain the final product.

[0065] In step one, the rotating speed of the longitudinal large wave-shaped roller 2 in different passes is increased during the longitudinal wave forming process, so as to improve the tension and precision of the longitudinal forming of the plate.

[0066] The above is a further detailed description of the utility model in combination with specific embodiments, and cannot be deemed as limiting the specific implementation of the utility model to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of inferences or substitutions can be made, and all of them shall be deemed as falling within the protection scope of the utility model.

Claims

1. A bi-directional corrugated panel for use in a yielding underground support structure, characterised in that: The plate body (1) is provided with longitudinal corrugations (101) and transverse corrugations (102) distributed perpendicularly to each other; the wave crests and wave troughs of the longitudinal corrugations (101) and the transverse corrugations (102) are arranged in continuous alternation, forming a two-way stiffness balanced corrugated structure; The sizes of the longitudinal corrugations (101) and the transverse corrugations (102) are adjusted according to engineering requirements to control the pressure deformation area and the maximum allowable deformation distance; Both ends of the plate body (1) are provided with connecting interfaces (103) for fixed connection with a unidirectional corrugated plate or an adjacent two-way corrugated plate by bolting or welding, so as to bear subsequent loads by the unidirectional corrugated plate after pressure deformation.

2. A forming device for a bidirectional corrugated sheet as claimed in claim 1, characterized in that: The longitudinal wave forming device and the transverse wave forming device are integrally connected through the fixed frame (5); The longitudinal wave forming device comprises longitudinal large wave forming rollers (2), a conveying roller (4) and a lifting mechanism (6); At least one pair of upper and lower symmetrical longitudinal large wave forming rollers (2) are arranged in the longitudinal wave forming device, and the surface of the longitudinal large wave forming roller (2) is provided with grooves matched with the longitudinal corrugations (101); The conveying roller (4) is used for feeding the plate at a constant speed into the longitudinal wave forming device; The lifting mechanism (6) is arranged on the fixed frame (5) and connected with the upper half longitudinal large wave forming roller (2), and is used for adjusting the distance between the upper and lower rollers to realize multi-pass synchronous forming; The transverse wave forming device comprises transverse large wave forming rollers (8), a sliding baffle (7) and small wave forming rollers (3); At least one pair of upper and lower symmetrical transverse large wave forming rollers (8) are arranged in the transverse wave forming device, and the surface of the transverse large wave forming roller (8) is provided with grooves matched with the transverse corrugations (102); The sliding baffle (7) is arranged at the inlet end of the transverse wave forming device and is used for positioning the starting position of the transverse bending of the plate; The small wave forming rollers (3) are symmetrically arranged above both sides of the plate and are used for limiting the warping of the plate during the transverse bending; The longitudinal large wave forming roller (2) and the transverse large wave forming roller (8) have the same structure.

3. The apparatus of claim 2, wherein: The groove depth of the longitudinal large wave forming roller (2) and the transverse large wave forming roller (8) is consistent with the corrugation height, and the surface of the roller is designed in a detachable and modular manner, and the corrugation parameters are adjusted by replacing rollers of different sizes.

4. The apparatus of claim 2, wherein: 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 with a power driving system; Both ends of the longitudinal large wave forming roller (2) are fixed in the rotator (603), the rotator (603) rotates driven by power as a power source to generate friction between the longitudinal large wave forming roller (2) and the plate, and the plate rotates and lifts under the action of the friction.

5. The apparatus of claim 2, wherein: In the transverse wave forming device, the downward stroke of the upper half transverse large wave forming 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 adapt to the transverse bending requirements of plates of different lengths.

6. The apparatus of claim 2, wherein: The longitudinal wave forming device adopts a simultaneous groove design system, all longitudinal waves (101) in the same section are simultaneously formed in one rolling process, and the distance between upper and lower rollers is gradually reduced by the down hill method to improve the forming precision.

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