Tunnel multi-supporting structure and method for pumped storage power station

Abstract

The invention provides a tunnel multi-supporting structure and method for a pumped storage power station. Walking wheels used for driving the whole device to move and walk are installed at the four corners of the bottom end of a supporting frame, and the walking wheels are supported at the top of a rail in a rolling mode; at least two discs are installed on the top of the supporting frame, and supporting mechanisms used for supporting the inner wall of the tunnel are installed on the discs. The supporting mechanism comprises a cross rod and at least two sleeves, the cross rod is rotationally supported on the disc on the right side, the sleeves are rotationally arranged outside the cross rod in a sleeving mode, three supporting rods are hinged to the outer walls of the sleeves through hinge shafts, and supporting plates are hinged to the ends, away from the sleeves, of the supporting rods; the supporting rod is connected with the opening assembly. The supporting structure solves the problem that in the tunnel construction process, in the anchor rod and anchor cable supporting process and in the shotcrete supporting process, under the vibration condition, huge pressure is applied to the supporting structure through strong vibration activity, and consequently the anchor rod and the anchor cable are loosened or concrete falls off.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel support, and in particular to a tunnel multiple support structure and method for a pumped storage power station. Background Art

[0002] The tunnel of a pumped-storage power station refers to a channel or pipeline system used to store and release water energy in a pumped-storage power station. A pumped-storage power station uses the gravitational potential energy of water for energy storage and conversion. Its working principle is based on transporting water from a high place to a low place for subsequent power generation.

[0003] When constructing the tunnel of a pumped-storage power station, it is necessary to support the inner wall of the tunnel to prevent soil collapse and collapse and ensure the safety of the construction area and workers. Common tunnel inner wall support measures include using steel anchors or steel cables to connect the inner wall of the tunnel to the surrounding rocks or soil to increase stability, or spraying concrete or shotcrete on the inner wall of the tunnel to form a solid structure and improve the stability of the inner wall. However, there are certain risks due to vibration during the construction of anchors, anchor cables and shotcrete support. Strong vibration activities exert great pressure on the support structure, causing the anchors and anchor cables to loosen or concrete to fall, which in turn brings safety hazards. Therefore, it is necessary to support the inner wall of the tunnel during tunnel construction to ensure the safety of the construction process.

[0004] Although, in the existing CN 116971807 A, a tunnel excavation support structure and construction method are disclosed, including a bottom plate, a fixing mechanism is installed on the bottom plate, two fixing frames are fixedly installed on the bottom plate, a rotating shaft is rotatably installed on the two fixing frames, and a positioning mechanism is installed between each rotating shaft and the corresponding fixing frame, a rotating block is fixedly installed on the two rotating shafts through a steering shaft, a plurality of side hydraulic rods are fixedly installed on the two rotating blocks, and a supporting side arc plate is fixedly installed on the plurality of side hydraulic rods, and a supporting mechanism is installed on each supporting side arc plate. However, this support structure adopts an elastic rope connection method, and in the subsequent opening process of the guard plate, since the elastic rope is a flexible structure, a good protective effect cannot be achieved.

[0005] Although, in the existing CN 217872844 U, a tunnel support structure is disclosed, including a connection part, the lower end of which is fixedly connected to a support mechanism, a plurality of connection sleeves are fixedly connected to the upper circumference of the connection part at equal distances, a plurality of connection sleeves are slidably provided with support edges, a plurality of support edges are hinged with hinged rods, and a plurality of hinged rods are provided with adjustment mechanisms. It mainly adopts a telescopic structure of a sliding sleeve, which is essentially a single-rod support structure. In the subsequent support process, there may be shaking, and the stability cannot be well guaranteed.

[0006] Although, in CN 112761689 A, a supporting device for excavating a tunnel connecting channel is disclosed, comprising a base and a first supporting plate, wherein the first supporting plate is in contact with the tunnel body, a piston box is arranged at the upper end of the base, a supporting mechanism is arranged at the upper end of the piston box, a plurality of supporting mechanisms are arranged and distributed in a fan shape at the upper end of the piston box, the supporting mechanism comprises a piston cylinder, a first piston block, a first connecting rod, a second supporting plate, a first one-way valve and an exhaust pipe, the piston cylinder is connected to the piston box, a first one-way valve is arranged in the piston cylinder, a first piston block is arranged above the first one-way valve, the first piston block is in sealing and sliding cooperation with the inner wall of the piston cylinder, and a first connecting rod is fixed to the upper end of the first piston block. This supporting structure adopts a telescopic driving structure of a piston rod and a cantilever support structure, and its supporting stability is poor. Summary of the invention

[0007] In order to solve the current technical problems, the main purpose of the present invention is to provide a tunnel multiple support structure and method for a pumped storage power station. This support structure solves the problem that during the tunnel construction process, due to the anchor rods and anchor cables and the shotcrete support process, under vibration conditions, the strong vibration activity exerts huge pressure on the support structure, causing the anchor rods and anchor cables to loosen or the concrete to fall; thereby protecting the tunnel construction process to ensure the safety and reliability of the tunnel construction.

[0008] In order to realize the above technical features, the object of the present invention is achieved as follows: a tunnel multi-support structure for a pumped storage power station, comprising a support frame for supporting and installing the entire device, and the four corners of the bottom end of the support frame are equipped with running wheels for driving the entire device to move, and the running wheels are rollingly supported on the top of the track, and the track is laid parallel to the bottom plate of the tunnel; At least two discs are installed on the top of the support frame, and support mechanisms for supporting the inner wall of the tunnel are installed on the discs; The support mechanism includes a crossbar and at least two sleeves, the crossbar is rotatably supported on the right disc, the sleeves are rotatably sleeved on the outside of the crossbar, three support rods are hinged on the outer wall of the sleeve through a hinge shaft, and a support plate is hingedly installed at one end of the support rod away from the sleeve, and is used to support the top wall of the tunnel; The support rod is connected to an opening assembly for opening or closing the support rod, and is further used to adjust the angle between the support rod and the cross bar.

[0009] There are two rails in total, which are arranged in parallel and installed at the bottom of the tunnel; there are four running wheels in total, and two running wheels on the same side form a group and are supported on the top of the rails on the same side; the running wheels adopt a self-propelled wheel structure with brakes.

[0010] The support mechanism also includes a pressure detection component, which includes at least three contact plates and at least three pressure sensors. The at least three contact plates are respectively arranged on the outside of at least three support plates, and the pressure sensor is installed between the contact plate and the support plate so that after the contact plate contacts the inner wall of the tunnel, the pressure sensor monitors the pressure it is subjected to.

[0011] The outer surface of the support plate is an arc-shaped surface to adapt to the shape of the tunnel top wall; A certain gap is reserved between the support plate and the contact plate, and at least four first springs are installed between each set of matched support plates and contact plates.

[0012] The bottom end of the sleeve is fixedly connected to the top of the support frame through a column to stably support the crossbar.

[0013] The opening assembly includes a motor, a screw, a sleeve and three push rods; the motor is installed on the left disc, the screw is transmission-connected to the output end of the motor, and the other end of the screw is rotationally connected to the cross bar, and the sleeve is threadedly connected to the outside of the screw; the three push rods are hinged to the outer wall of the sleeve through a hinge shaft, and the ends of the three push rods away from the sleeve are respectively hinged to the three support rods through hinge shafts for rotationally supporting the support rods.

[0014] The inner wall of the sliding sleeve is processed with an internal thread, which matches with the external thread of the screw rod to form a thread transmission match to ensure that the sliding sleeve performs left and right linear motion on the outer side of the screw rod.

[0015] Side guard plates are vertically installed at the bottom ends of the support plates on both sides, and the side guard plates are in contact with and support the vertical parts of the inner wall of the tunnel.

[0016] The two side guard plates are arranged at a transverse interval on the left and right sides of the support frame; and a force-applying component for supporting the inside of the side guard plate is arranged between the side guard plate and the support frame.

[0017] The force-applying assembly includes at least two support seats, at least two screw rods and at least two cross plates; At least two of the support seats are arranged on the support frame at a transverse interval, at least two of the screw rods are respectively connected to the inside of the two support seats, and at least two of the transverse plates are respectively installed at the ends of the at least two screw rods that are opposite to each other; The outer sides of at least two of the screw rods are threadedly connected with a same rotating member for simultaneously adjusting the distance between the two screw rods, thereby supporting the two side guard plates.

[0018] At least two guide rods are installed on the transverse plate, and at least two of the guide rods are connected through the inside of the support seat; At least two of the transverse plates are respectively fitted with the two side guard plates to push the two side guard plates to move backwards.

[0019] It also includes a control system, which includes a controller, a signal input end of the controller is connected to a pressure sensor through a signal line, and monitors the pressure of the inner wall of the tunnel in real time; a signal output end of the controller is connected to a driver of the motor through a signal line; when the pressure signal value received by the controller exceeds a set threshold, a control signal will be sent to the driver, thereby driving the motor, driving the screw through the motor, driving the sleeve through the screw, and then driving the push rod through the sleeve, the push rod will drive the support rod to open, thereby driving the support plate to open outward, and tightly support the inner wall of the tunnel to achieve the purpose of protection.

[0020] A tunnel multiple support method for a pumped storage power station, the method is implemented by using any one of the tunnel multiple support structures, and comprises the following steps: S1, Track Laying: Lay the track on the excavated tunnel floor and fix it with ground anchors; S2, Installation of tunnel multiple support structures: After the track is laid, the support frame is moved and supported on the top of the track through the four running wheels at the bottom, and it is ensured that it can move smoothly on the track; S3, Position adjustment of tunnel multiple support structures: Start the traveling wheels, and use the traveling wheels to drive the entire support frame to move to the position where the tunnel needs to be supported; S4, support adjustment of the support mechanism: After the support frame is moved into place, the opening component is started according to the distance between the support plate and the inner wall of the tunnel, and the spacing between the three support rods and the cross bar is adjusted by the opening component. When the support rod is opened, the support plate connected to it is opened at the same time; the support plate connected to it is opened by the support rod, so that the three support plates are in contact with the top of the inner wall of the tunnel to support the tunnel; S5, automatic support and protection of tunnels: In the subsequent normal support process, the pressure of the inner wall of the tunnel is monitored in real time through the support mechanism. When the tunnel pressure exceeds the set value, the signal feedback will automatically control the opening of the opening component, so that the screw drives the sliding sleeve, and the sliding sleeve drives the top rod. The top rod drives the support rod to open, and then drives the support plate to open outward and closely support the inner wall of the tunnel, thereby achieving the support effect; S6, support adjustment of the next working surface of the support mechanism: After the support of one working face is completed, the opening component is controlled to close the support rod through the opening component, and then the support plate is driven to close through the support rod and detach from the inner wall of the tunnel, and then the entire support structure is moved to the next working face to resume the support operation.

[0021] The present invention has the following beneficial effects: 1. The multiple support structure of the present invention drives the screw to rotate. When the screw rotates, it pushes the sliding sleeve on its outer side to move to the right. At this time, the three top rods hinged to the screw move to the right accordingly. At the same time, the other ends of the three top rods lift up the three support rods and support plates, so that the three support plates contact the inner top wall of the tunnel, thereby supporting the top of the tunnel. When the support plates on the front and rear sides are unfolded and contact the top of the tunnel, the side guard plates connected to them are unfolded at the same time and contact the vertical parts on the front and rear sides of the tunnel at the same time, so as to support the vertical parts on the front and rear sides of the tunnel, thereby realizing multiple supports for the tunnel.

[0022] 2. The multiple support structure of the present invention drives the two screws to move in opposite directions by rotating the rotating parts, and the two screws push the two horizontal plates to move respectively, so that the two horizontal plates are closely fitted with the front and rear sides of the inner wall of the tunnel respectively, thereby effectively improving the support effect on the two vertical parts of the tunnel.

[0023] 3. The multiple support structure of the present invention contacts the inner top wall of the tunnel through the contact plate, thereby supporting the inner top wall of the tunnel. At the same time, the support plate will continue to move toward the contact plate while supporting, and the pressure sensor on the support plate will contact the contact plate. The pressure sensor transmits the pressure it receives to the terminal, and saves the provided data. By comparing it with the value provided by the later pressure sensor, when the value on the pressure sensor increases, it means that the top wall of the tunnel in this area has collapsed, causing the pressure value on the pressure sensor to increase, so as to facilitate subsequent maintenance and treatment of the collapsed part.

[0024] 4. The present invention can realize automatic monitoring of pressure through the control system, and when the pressure exceeds the set value, further open the support plate to ensure the stability and reliability of the support, thereby ensuring the safety of the construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a schematic diagram of the structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of the present invention after the contact plate is removed.

[0028] Figure 3 It is a schematic diagram of the support mechanism of the present invention.

[0029] Figure 4 It is a bottom view structural schematic diagram of the support mechanism of the present invention.

[0030] Figure 5 It is a schematic diagram of the force-applying component of the present invention.

[0031] Figure 6 It is a schematic diagram of the pressure detection component of the present invention.

[0032] In the figure: 1. support frame; 2. walking wheel; 3. track; 4. disc; 5. support mechanism; 501. cross bar; 502. sleeve; 503. column; 504. support rod; 505. support plate; 506. motor; 507. screw; 508. sleeve; 509. push rod; 510. side guard plate; 511. contact plate; 512. pressure sensor; 513. spring; 6. force-applying component; 601. support seat; 602. screw; 603. cross plate; 604. rotating part. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0034] Embodiment 1: See also Figure 1 In this embodiment, a tunnel multi-support structure for a pumped storage power station is used to support the inner wall of the tunnel to prevent the tunnel from collapsing; Specifically, it includes a support frame 1, four running wheels 2 and two tracks 3; the four running wheels 2 are all installed under the support frame 1, the two tracks 3 are laid at the bottom of the tunnel, and the two tracks 3 are arranged in parallel, and the four running wheels 2 are respectively connected to the two tracks 3 in a group of two; at least two discs 4 are installed on the support frame 1, and a supporting mechanism 5 is installed on the disc 4 to support the inner wall of the tunnel.

[0035] In actual use, two rails 3 are laid at the bottom of the tunnel, the device is moved to the position required for support by the four running wheels 2 at the bottom of the support frame 1, and the inner wall of the tunnel is supported by unfolding the support mechanism 5.

[0036] See also Figure 2 and 3 In order to support the inner wall of the tunnel, the supporting mechanism 5 in this embodiment includes a cross bar 501 and at least two sleeves 502. The cross bar 501 is assembled on the right disc 4. At least two sleeves 502 are fixedly sleeved on the outer side of the cross bar 501. Three support rods 504 are hinged on the outer side of the sleeve 502 through a hinge axis, and a support plate 505 is installed at one end of the support rod 504 away from the sleeve 502 to support the top wall of the tunnel.

[0037] In actual setting, in order to simultaneously unfold the three support rods 504 and the three support rods 504 , an unfolding assembly is installed on the disc 4 to adjust the angle between the three support rods 504 and the cross bar 501 .

[0038] In actual use, the distance between the three support rods 504 and the cross bar 501 is adjusted by opening the assembly, and the support plates 505 connected thereto are opened by the support rods 504 so that the three support plates 505 are in contact with the top of the inner wall of the tunnel to support the top of the tunnel.

[0039] Furthermore, in order to enable the support plate 505 to effectively contact the top of the tunnel, the shape of the left cross-section of the support plate 505 in this embodiment is preferably arc-shaped, so that the support plate 505 can better adapt to the shape of the tunnel top wall, and then fit closely with the top of the tunnel, thereby increasing the effect of supporting the tunnel top.

[0040] Furthermore, in order to support the cross bar 501, the two sleeves 502 in this embodiment are connected to the support frame 1 through the columns 503, and the sleeves 502 are supported by the two columns 503 to support the cross bar 501, thereby improving the lightness and bending resistance of the cross bar 501.

[0041] In a specific embodiment, in order to open the three support rods 504 and the three support plates 505, the opening assembly includes a motor 506, a screw 507, a sleeve 508 and three push rods 509; the motor 506 is installed on the left disc 4, the screw 507 is transmission-connected to the output end of the motor 506, and the other end of the screw 507 is rotationally connected to the cross bar 501, the sleeve 508 is threadedly connected to the outer side of the screw 507, the three push rods 509 are all hinged to the outer side of the sleeve 508 through a hinge shaft, and the ends of the three push rods 509 away from the sleeve 508 are respectively hinged to the three support rods 504 through hinge shafts, so as to support the support rods 504.

[0042] In actual use, by turning on the electric control switch of the motor 506, the output end of the motor 506 rotates to drive the screw 507 connected to it to rotate. Through the effect of the threaded connection, the screw 507 rotates and pushes the sliding sleeve 508 on its outside to move to the right. At this time, the three top rods 509 hinged to it move to the right accordingly. At the same time, the other ends of the three top rods 509 lift up the three support rods 504. At this time, the angle between the three support rods 504 and the cross bar 501 increases accordingly. At the same time, the three support plates 505 move in the direction away from the cross bar 501 and contact the inner top wall of the tunnel, thereby supporting the top of the tunnel.

[0043] It should be noted that, in order to ensure that the sliding sleeve 508 on the outside of the screw rod 507 can move with the three push rods 509 when the screw rod 507 rotates, the sliding sleeve 508 in this embodiment performs left-right linear motion on the outside of the screw rod 507 .

[0044] In addition, in order to detect the top wall of the tunnel in real time, the support mechanism 5 in this embodiment also includes a pressure detection component, which includes at least three contact plates 511 and at least three pressure sensors 512. The at least three contact plates 511 are respectively arranged on the outside of at least three support plates 505, and the pressure sensor 512 is installed between the contact plate 511 and the support plate 505, so that after the contact plate 511 contacts the top of the tunnel, the pressure sensor 512 records the pressure it is subjected to.

[0045] In actual use, the contact plate 511 contacts the inner top wall of the tunnel, thereby supporting the inner top wall of the tunnel. At the same time, the support plate 505 will continue to move toward the contact plate 511 while supporting, and the pressure sensor 512 on the support plate 505 contacts the contact plate 511. The pressure sensor 512 transmits the pressure it receives to the terminal, and saves the provided data. By comparing it with the value provided by the later pressure sensor 512, when the value on the pressure sensor 512 increases, it means that the top wall of the tunnel in this area has collapsed, causing the pressure value on the pressure sensor 512 to increase, so as to facilitate subsequent maintenance and treatment of the collapsed part.

[0046] Furthermore, in order to facilitate the setting of the pressure sensor 512, a certain gap is retained between the support plate 505 and the contact plate 511, and at least four first springs 513 are installed between the support plate 505 and the contact plate 511, and the four first springs 513 are arranged at the four corners of the support plate 505 and the contact plate 511 to ensure that the support plate 505 and the contact plate 511 are arranged in parallel.

[0047] See also Figure 2 and 3 In order to support the vertical part of the tunnel, side guard plates 510 are vertically installed on the front and rear support plates 505 in this embodiment to support the vertical part of the inner wall of the tunnel.

[0048] In actual settings, the side guard plates 510 are laterally spaced apart on the front and rear sides of the support frame 1, that is, when the support plates 505 on the front and rear sides are unfolded and contact the top of the tunnel, the side guard plates 510 connected thereto are simultaneously unfolded and contact the vertical parts of the front and rear sides of the tunnel at the same time, so as to support the vertical parts of the front and rear sides of the tunnel.

[0049] See also Figure 4In order to ensure that the two side guard plates 510 can fit tightly with the front and rear sides of the inner wall of the tunnel, in this embodiment, a force-applying component 6 is installed on the support frame 1 corresponding to the two side guard plates 510; the force-applying component 6 includes at least two support seats 601, at least two screw rods 602 and at least two cross plates 603; at least two support seats 601 are arranged on the support frame 1 with a horizontal interval, at least two screw rods 602 are respectively connected to the inside of the two support seats 601, and at least two cross plates 603 are respectively installed at the opposite ends of the at least two screw rods 602; the same rotating member 604 is threadedly connected to the outer side of the at least two screw rods 602 to adjust the distance between the two screw rods 602 to support the two side guard plates 510.

[0050] It should be noted that at least two horizontal plates 603 are respectively fitted with the two side guard plates 510 to push the two side guard plates 510 to move in opposite directions, that is, when the horizontal plate 603 moves, it can push the two side guard plates 510 to move.

[0051] In actual use, the two screw rods 602 are driven to move in opposite directions by rotating the rotating member 604, and the two screw rods 602 respectively push the two horizontal plates 603 to move, so that the two horizontal plates 603 are closely fitted to the front and rear sides of the inner wall of the tunnel, thereby effectively improving the supporting effect on the two vertical parts of the tunnel.

[0052] In addition, vertical plates are installed on the back side of the two side guard plates 510, and a plurality of springs 513 are also installed on the side of the side guard plate 510 opposite to the vertical plates, so that the distance between the side guard plate 510 and the vertical plates is equal to the distance between the support plate 505 and the contact plate 511.

[0053] Furthermore, in order to ensure the stability of the two horizontal plates 603 when moving, at least two guide rods are installed on the horizontal plates 603, and at least two guide rods are connected to the inside of the support seat 601, that is, when the horizontal plates 603 are moving, the two guide rods can be driven to slide inside the support seat 601, thereby achieving the guiding effect on the horizontal plates 603.

[0054] Embodiment 2: Furthermore, in order to realize multiple supports for the inner wall of the pipeline, a tunnel multiple support method for a pumped storage power station proposed in this embodiment is realized by using the support structure described above, and includes the following steps: S1: Lay two rails 3 at the bottom of the tunnel, and move the device to the position of the tunnel that needs support through the four running wheels 2 at the bottom of the support frame 1; S2: The distance between the three support rods 504 and the cross bar 501 is adjusted by opening the assembly, and when the support rods 504 are opened, the support plates 505 connected thereto are also opened; S201: By turning on the electric control switch of the motor 506, the output end of the motor 506 rotates to drive the screw 507 connected thereto to rotate, and through the effect of the threaded connection, the screw 507 rotates to push the outer sleeve 508 to move rightward; S202: When the sliding sleeve 508 moves to the right, the three push rods 509 hinged thereto move to the right accordingly, and at the same time, the other ends of the three push rods 509 push up the three support rods 504 accordingly; S203: When the three support rods 504 are spread out, the angles between the three support rods 504 and the crossbar 501 increase, and at the same time, the three support plates 505 move away from the crossbar 501 and contact the inner top wall of the tunnel, thereby supporting the inner wall of the tunnel; S3: The support plates 505 connected to the support rods 504 are spread open so that the three support plates 505 are in contact with the top of the inner wall of the tunnel to support the tunnel; S301: After the support plates 505 on the front and rear sides are unfolded and contact the top of the tunnel, the side guard plates 510 connected thereto are unfolded at the same time and contact the vertical parts of the front and rear sides of the tunnel at the same time, so as to support the front and rear sides of the tunnel; S302: The two screw rods 602 are driven to move in opposite directions by rotating the rotating member 604, so that the two screw rods 602 push the two horizontal plates 603 to move respectively, and the two horizontal plates 603 are closely attached to the front and rear sides of the inner wall of the tunnel respectively, so as to support the two vertical parts of the tunnel.

[0055] Embodiment 3: This example provides a tunnel multiple support method for a pumped storage power station, the method is implemented by using any one of the tunnel multiple support structures, and comprises the following steps: S1, Track Laying: Laying the track 3 on the tunnel floor that has been excavated, and fixing the track 3 by ground anchors; S2, Installation of tunnel multiple support structures: After the track 3 is laid, the support frame 1 is moved and supported on the top of the track 3 through the four running wheels 2 at the bottom, and it is ensured that it can move smoothly on the track 3; S3, Position adjustment of tunnel multiple support structures: Start the running wheel 2, and drive the entire support frame 1 to move to the position where the tunnel needs to be supported by the running wheel 2; S4, support adjustment of the support mechanism 5: After the support frame 1 is moved into place, the opening component is started according to the distance between the support plate 505 and the inner wall of the tunnel, and the spacing between the three support rods 504 and the cross bar 501 is adjusted by the opening component. When the support rod 504 is opened, the support plate 505 connected thereto is also opened; the support plate 505 connected thereto is opened by the support rod 504, so that the three support plates 505 are in contact with the top of the inner wall of the tunnel, so as to support the tunnel; S5, automatic support and protection of tunnels: In the subsequent normal support process, the pressure of the inner wall of the tunnel is monitored in real time through the support mechanism 5. When the tunnel pressure exceeds the set value, the opening of the opening component is automatically controlled through signal feedback, so that the screw rod 507 drives the sliding sleeve 508, and the sliding sleeve 508 drives the top rod 509. The top rod 509 drives the support rod 504 to open, and then drives the support plate 505 to open outward and closely support the inner wall of the tunnel, thereby achieving the support effect; S6, support adjustment of the next working surface of the support mechanism 5: After the support of one working face is completed, the opening component is controlled to close the support rod 504 through the opening component, and then the support plate 505 is driven to close through the support rod 504 and detach from the inner wall of the tunnel, and then the entire support structure is moved to the next working face to resume the support operation.

Claims

1. A tunnel multi-support structure for a pumped storage power station, characterized in that: It comprises a support frame (1) for supporting and installing the entire device, and the four corners of the bottom end of the support frame (1) are equipped with running wheels (2) for driving the entire device to move, and the running wheels (2) are rollingly supported on the top of a track (3), and the track (3) is laid parallel to the bottom plate of the tunnel; At least two discs (4) are mounted on the top of the support frame (1), and a support mechanism (5) for supporting the inner wall of the tunnel is mounted on the disc (4); The support mechanism (5) comprises a crossbar (501) and at least two sleeves (502), wherein the crossbar (501) is rotatably supported on the right disk (4), and the sleeves (502) are rotatably sleeved on the outside of the crossbar (501), and three support rods (504) are hingedly connected to the outer wall of the sleeve (502) via a hinge shaft, and a support plate (505) is hingedly installed at one end of the support rod (504) away from the sleeve (502), and is used to support the top wall of the tunnel; The support rod (504) is connected to an opening assembly used to open or close the support rod, and is further used to adjust the angle between the support rod (504) and the crossbar (501).

2. A tunnel multi-support structure for a pumped storage power station according to claim 1, characterized in that: There are two rails (3) in total, which are arranged in parallel and installed at the bottom of the tunnel; there are four running wheels (2) in total, and two running wheels (2) located on the same side form a group and are supported on the top of the rails (3) on the same side; the running wheels (2) adopt a self-propelled wheel structure with brakes.

3. A tunnel multi-support structure for a pumped storage power station according to claim 1, characterized in that: The support mechanism (5) further comprises a pressure detection assembly, the pressure detection assembly comprising at least three contact plates (511) and at least three pressure sensors (512), the at least three contact plates (511) being respectively arranged on the outside of at least three support plates (505), and the pressure sensors (512) being installed between the contact plates (511) and the support plates (505), so that after the contact plates (511) come into contact with the inner wall of the tunnel, the pressure sensors (512) monitor the pressure applied to the contact plates (511).

4. A tunnel multi-support structure for a pumped storage power station according to claim 3, characterized in that: The outer surface of the support plate (505) is an arc-shaped surface so as to adapt to the shape of the tunnel top wall; A certain gap is reserved between the support plate (505) and the contact plate (511), and at least four first springs (513) are installed between each set of matching support plates (505) and contact plates (511).

5. A tunnel multi-support structure for a pumped storage power station according to claim 1, characterized in that: The bottom end of the sleeve (502) is fixedly connected to the top of the support frame (1) via a column (503) to stably support the crossbar (501).

6. A tunnel multi-support structure for a pumped storage power station according to claim 3, characterized in that: The opening assembly comprises a motor (506), a screw rod (507), a sleeve (508) and three push rods (509); the motor (506) is mounted on the left disc (4); the screw rod (507) is transmission-connected to the output end of the motor (506); the other end of the screw rod (507) is rotationally connected to the cross bar (501); the sleeve (508) is threadedly connected to the outside of the screw rod (507); the three push rods (509) are hinged to the outer wall of the sleeve (508) via a hinge shaft, and the ends of the three push rods (509) away from the sleeve (508) are respectively hinged to the three support rods (504) via the hinge shaft, so as to provide rotational support for the support rods (504).

7. A tunnel multi-support structure for a pumped storage power station according to claim 1, characterized in that: The inner wall of the sliding sleeve (508) is processed with an internal thread, which cooperates with the external thread of the screw rod (507) to form a thread transmission cooperation, so as to ensure that the sliding sleeve (508) performs left and right linear movement on the outer side of the screw rod (507).

8. A tunnel multi-support structure for a pumped storage power station according to claim 4, characterized in that: Side guard plates (510) are respectively vertically mounted at the bottom ends of the support plates (505) on both sides, and the side guard plates (510) are in contact with and support vertical portions of the inner wall of the tunnel.

9. A tunnel multi-support structure for a pumped storage power station according to claim 8, characterized in that: The two side guard plates (510) are arranged at a transverse interval on the left and right sides of the support frame (1); and a force-applying component (6) for supporting the inside of the side guard plate (510) is arranged between the side guard plate (510) and the support frame (1).

10. A tunnel multi-support structure for a pumped storage power station according to claim 9, characterized in that: The force-applying assembly (6) comprises at least two support seats (601), at least two screw rods (602) and at least two transverse plates (603); At least two of the support seats (601) are arranged on the support frame (1) at a transverse interval, at least two of the screw rods (602) are respectively connected to the inside of the two support seats (601), and at least two of the transverse plates (603) are respectively installed at the opposite ends of the at least two screw rods (602); The outer sides of at least two of the screw rods (602) are threadedly connected to a same rotating member (604) for simultaneously adjusting the distance between the two screw rods (602), thereby supporting the two side guard plates (510).

11. A tunnel multi-support structure for a pumped storage power station according to claim 10, characterized in that: At least two guide rods are installed on the transverse plate (603), and at least two of the guide rods penetrate and are connected to the interior of the support seat (601); At least two of the transverse plates (603) are respectively fitted with the two side guard plates (510) to push the two side guard plates (510) to move in opposite directions.

12. A tunnel multi-support structure for a pumped storage power station according to claim 6, characterized in that: The invention also includes a control system, wherein the control system includes a controller, wherein a signal input end of the controller is connected to a pressure sensor (512) via a signal line, and the pressure of the inner wall of the tunnel is monitored in real time; a signal output end of the controller is connected to a driver of a motor (506) via a signal line; when the pressure signal value received by the controller exceeds a set threshold value, a control signal is sent to the driver, thereby driving the motor (506), driving the screw rod (507) via the motor (506), driving the sleeve (508) via the screw rod (507), and then driving the push rod (509) via the sleeve (508); the push rod (509) drives the support rod (504) to open, thereby driving the support plate (505) to open outward, and closely supporting the inner wall of the tunnel, so as to achieve the purpose of protection.

13. A tunnel multi-support method for a pumped storage power station, characterized in that: The method is implemented by using the tunnel multiple support structure according to any one of claims 1 to 12, and is characterized in that it comprises the following steps: S1, Track Laying: Laying a track (3) on the tunnel floor that has been excavated, and fixing the track (3) by ground anchors; S2, installation of tunnel multiple support structures: After the track (3) is laid, the support frame (1) is moved and supported on the top of the track (3) through the four running wheels (2) at the bottom, and is ensured to be able to move smoothly on the track (3); S3, Position adjustment of multiple support structures in tunnels: Starting the running wheel (2), and driving the entire support frame (1) to move to a position in the tunnel that needs to be supported by the running wheel (2); S4, support adjustment of the support mechanism (5): After the support frame (1) is moved into position, the opening component is activated according to the distance between the support plate (505) and the inner wall of the tunnel, and the spacing between the three support rods (504) and the cross bar (501) is adjusted by the opening component. When the support rod (504) is opened, the support plate (505) connected thereto is opened at the same time; the support plate (505) connected thereto is opened by the support rod (504), so that the three support plates (505) are all in contact with the top of the inner wall of the tunnel, so as to support the tunnel; S5, automatic support and protection of tunnels: In the subsequent normal support process, the pressure of the inner wall of the tunnel is monitored in real time through the support mechanism (5). When the tunnel pressure exceeds the set value, the opening of the opening component is automatically controlled through signal feedback, so that the screw rod (507) drives the sliding sleeve (508), and the sliding sleeve (508) drives the top rod (509). The top rod (509) drives the support rod (504) to open, thereby driving the support plate (505) to open outwards and closely support the inner wall of the tunnel, thereby achieving a support effect; S6, support adjustment of the next working surface of the support mechanism (5): After the support of one working face is completed, the opening assembly is controlled to close the support rod (504) through the opening assembly, and then the support plate (505) is driven to close through the support rod (504) and detach from the inner wall of the tunnel, and then the entire support structure is moved to the next working face to resume the support operation.

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