A tunnel foundation pit slope pressure support mechanism

Abstract

The present invention provides a tunnel foundation pit slope pressure support mechanism, including a slope pressure support assembly; the number of the slope pressure support assemblies is several, and also includes: a carrier, the carrier is movable, a lifting drive is arranged in the carrier, and two symmetrically arranged hydraulic cylinders for providing pressure for the slope pressure support assembly are installed on the top of the lifting drive; the output ends of the two hydraulic cylinders are fixedly connected to a slot frame, the slot frame is provided with a slot body with a top opening and used for inserting the slope pressure support assembly; the slot frame is fixedly connected to a permanent magnet through a connecting frame. The hydraulic cylinder as a pressure power source is mounted on a movable carrier, and is moved by the carrier to move the hydraulic cylinder to the slope pressure support assembly at different positions to provide pressure for the slope pressure support assembly. After the slope is pressed, it can be evacuated through the lifting drive of the lifting drive, thereby avoiding the waste of power source.

Description

Technical Field

[0001] The invention relates to the field of tunnel foundation pit slope protection, and in particular to a tunnel foundation pit slope pressure support mechanism. Background Art

[0002] The tunnel foundation pit slope refers to the slope formed by the space excavated from the ground for the construction of the underground part during the tunnel construction process. In order to ensure the stability of the tunnel foundation pit slope, it is often necessary to set up a pressure support mechanism or device at the slope position.

[0003] In the current prior art, when the pressure support mechanism applies pressure to the foundation pit slope, non-manual pressure methods such as hydraulic or electric pressure are mostly used to reduce the intensity of manual labor. For example, in the existing patent document "CN216275716U Deep Foundation Pit Construction Work Support Device", a hydraulic motor is used to drive the transmission gear to mesh and rotate in the tooth groove, so that the sliding plate with the tooth groove moves to both sides, pushing the support baffles on both sides to move and fit with the slope of the deep foundation pit; in the above-mentioned prior art, after pressure is applied to the slope, the power source cannot be evacuated. In the process of pressure support for the foundation pit slope over a large area and a wide range, a large number of support devices need to be used, resulting in each support device using a power source, which causes waste. Summary of the invention

[0004] The present invention provides a tunnel foundation pit slope pressure support mechanism to solve the technical problem that after a single slope pressure support member is pressed against the slope, its power source for providing pressure cannot be withdrawn.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a tunnel foundation pit slope pressure support mechanism, including a slope pressure support assembly; the number of the slope pressure support assemblies is several, and also includes: a carrier, the carrier is movable, a lifting drive member is arranged in the carrier, and two symmetrically arranged hydraulic cylinders for providing pressure for the slope pressure support assembly are installed on the top of the lifting drive member; the output ends of the two hydraulic cylinders are fixedly connected to a slot frame, the slot frame is provided with a slot body with a top opening and used for the slope pressure support assembly to be plugged in; the slot frame is fixedly connected to a permanent magnet through a connecting frame; a locking assembly, the slope pressure support assembly has a plug-in positioning portion that can be magnetically attracted by the permanent magnet, and a locking assembly is arranged at the plug-in positioning portion; an unlocking assembly, the unlocking assembly is installed on the connecting frame, the unlocking assembly has a driving portion, and the driving portion is arranged in the slot body.

[0007] In the present technical solution, the movable carrier and the lifting drive member drive the hydraulic cylinder to move up and down, so that the hydraulic cylinder can be withdrawn after applying pressure to the slope pressure support assembly, and can apply pressure to a large number of slope pressure support assemblies, avoiding the need to use a large number of power sources.

[0008] Preferably, the slope pressure support assembly includes a retaining plate, a sleeve, a straight rod and an end edge plate; there are two retaining plates, and the two retaining plates are respectively arranged at the two ends of the straight rod, and a sleeve is fixedly connected to the plate surface of the two retaining plates facing the straight rod, and the two sleeves are respectively sleeved to the two ends of the straight rod; the end of the sleeve away from the retaining plate is fixedly connected to the end edge plate for being inserted into the trough body.

[0009] In the present technical solution, the end edge plate is used to be inserted into the trough body, and is directly driven by the hydraulic cylinder to drive the sleeve to slide on the straight rod, thereby driving the retaining plate to be pressed against the slope.

[0010] Preferably, the plug-in positioning part includes a sleeve, a first spring and an iron plug column; the sleeve is fixedly installed to the front side of one end of the sleeve near the end along the plate, a guide hole is opened on the sleeve wall, the sleeve is connected with the inside of the sleeve through the guide hole, the iron plug column is inserted into the sleeve, and the iron plug column is connected with the guide hole with a gap, the first spring is sleeved on the iron plug column, and the first spring is located in the sleeve, one end of the first spring is fixedly connected to the iron plug column, and the other end of the first spring is fixedly connected to the outer wall of the sleeve.

[0011] In the technical solution, the plug-in positioning portion is used for positioning the sleeve and the straight pipe after sliding.

[0012] Preferably, both sides of the straight rod are provided with a plurality of equally spaced insertion holes along the length direction.

[0013] In the technical solution, the socket is used for inserting the end of the iron plug column, and the sleeve and the straight rod are positioned by plugging the two together.

[0014] Preferably, the carrier includes a seat body and casters, casters are installed at the four corners of the bottom of the seat body, the lifting drive component is fixedly installed in the seat body, and the output shaft end of the lifting drive component is fixedly connected with a connecting plate, the connecting plate is fixedly connected to the bottom of the hydraulic cylinder, and the bottom end of the connecting plate is connected with a guide groove opened on the seat body in a clearance fit.

[0015] In the present technical solution, the carrier is moved by casters, and the lifting drive member thereon is used to drive the hydraulic cylinder for lifting and adjusting.

[0016] Preferably, the locking assembly includes a first movable block, a second movable block and a positioning rod; a vertical hole is formed on the tube wall of the sleeve, and the top of the hole is connected to the guide hole, the positioning rod is connected to the hole with a clearance fit, a positioning hole for inserting the positioning rod is formed at the bottom of the iron plug, the bottom end of the positioning rod is fixedly connected to the second movable block, the top of the second movable block is elastically connected to the bottom of the sleeve, the first movable block is connected to the bottom of the sleeve by a longitudinal elastic member, and a first inclined surface and a second inclined surface are respectively provided on the first movable block and the second movable block, and the first inclined surface and the second inclined surface are in contact with each other.

[0017] In the technical solution, the locking assembly is used to position the iron plug after it is inserted into the socket.

[0018] Preferably, the locking assembly further comprises a fourth spring, the bottom end of the fourth spring is fixedly connected to the top of the second movable block, and the top end of the fourth spring is fixedly connected to the bottom surface of the sleeve.

[0019] In the technical solution, the fourth spring is used for elastically mounting the top of the second movable block and the bottom of the sleeve.

[0020] Preferably, the longitudinal elastic member includes a fixed plate, a third spring, a guide rod and a stop seat; the fixed plate is fixedly connected to the bottom surface of the sleeve, a guide hole is opened on the fixed plate, the guide rod is connected to the guide hole with a clearance fit, and one end of the guide rod is fixedly connected to the first movable block, the other end of the guide rod is fixedly connected to the stop seat, and the third spring is sleeved on the guide rod.

[0021] In the technical solution, the longitudinal elastic member is used for the longitudinal elastic connection between the first movable block and the bottom of the sleeve.

[0022] Preferably, the driving part of the unlocking assembly includes a driving rod located in the slot body and a first piston fixed to the bottom end of the driving rod; an oil chamber is opened in the embedded slot frame, a connecting hole is provided between the oil chamber and the slot body, the driving rod is connected with the connecting hole with a clearance fit, the first piston is connected to the oil chamber with a fit, a second spring is provided at the bottom of the first piston, and the two ends of the second spring are respectively abutted against the bottom of the first piston and the bottom cavity wall of the oil chamber.

[0023] In this technical solution, the driving part is used to drive the unlocking component.

[0024] Preferably, the unlocking assembly includes a cylinder and an oil pipe; a second piston is cooperatively connected in the cylinder, a push rod is fixedly connected to the middle of the second piston, and the push rod extends to the outside of the cylinder, one end of the oil pipe is connected to the cylinder, and the other end of the oil pipe is connected to the bottom of the oil chamber.

[0025] In the technical solution, the unlocking component unlocks the locking component under the drive of the driving unit.

[0026] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0027] The positive and progressive effects of the present invention are:

[0028] The above-mentioned tunnel foundation pit slope pressure support mechanism, when carrying out large-area foundation pit slope pressure support, the hydraulic cylinder as the pressure power source is mounted on a movable carrier, and the carrier is moved to move the hydraulic cylinder to the slope pressure support components at different positions to provide pressure for the slope pressure support components. After the slope is pressed, it can be evacuated through the lifting drive of the lifting drive member, thereby avoiding the waste of power source; at the same time, a plug-in positioning part is provided on the slope pressure support component, and the plug-in positioning part is used for positioning the slope pressure support component after pressing the slope to maintain the pressed state, and a plug-in positioning part is provided on the hydraulic cylinder The permanent magnet of the plug-in positioning part can be magnetically attracted. During the process of applying pressure or releasing pressure, the plug-in positioning part is automatically magnetically attracted by the permanent magnet, so that the plug-in positioning is automatically released without manual release operation; a locking component is further provided, and after the plug-in positioning part is positioned, the locking component provides re-locking to improve the positioning effect of the slope pressure support component; further, the driving part of the unlocking component is arranged in the slot body, so that the unlocking component performs the unlocking process of the locking component, and provides driving force through the slot body into which the slope pressure support component is inserted, so that the unlocking process does not require manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic diagram of the overall front structure of the present invention.

[0031] Figure 3 It is a structural schematic diagram of one side of the slope pressure support assembly of the present invention.

[0032] Figure 4 It is a schematic structural diagram of the permanent magnet, the connecting frame, the hydraulic cylinder and the embedding frame of the present invention.

[0033] Figure 5 It is a schematic structural diagram of the permanent magnet, the slotted frame and the slope pressure support assembly of the present invention.

[0034] Figure 6 For the present invention Figure 5 Schematic diagram of the structure with the A part in the middle enlarged.

[0035] Figure 7 It is a schematic diagram of the structure of the unlocking component and the locking component of the present invention.

[0036] Figure 8It is a schematic structural diagram of the carrier of the present invention.

[0037] Description of Reference Numerals

[0038] 1. Slope pressure support assembly; 101. Earth retaining plate; 102. Casing; 103. Straight rod; 104. End plate; 105. Iron plug column; 1051. Positioning hole; 106. Casing body; 107. First spring; 108. Socket;

[0039] 2. Carrier; 201. Carrier body; 202. Casters; 203. Connecting plate; 204. Lifting drive member;

[0040] 3. Permanent magnet;

[0041] 4. Connecting frame;

[0042] 5. Hydraulic cylinder;

[0043] 6. slot frame; 601. slot body;

[0044] 7. Unlocking assembly; 701. Driving rod; 702. First piston; 703. Oil chamber; 704. Second spring; 705. Oil delivery pipe; 706. Cylinder; 707. Second piston; 708. Push rod;

[0045] 8. Locking assembly; 801. Fixed plate; 802. First movable block; 803. Third spring; 804. Guide rod; 805. Block seat; 806. Second movable block; 807. Positioning rod; 808. Fourth spring. DETAILED DESCRIPTION

[0046] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0047] like Figure 1-8 As shown, a tunnel foundation pit slope pressure support mechanism includes a slope pressure support component 1; the number of the slope pressure support components 1 is several, and also includes: a carrier 2, the carrier 2 is movable, a lifting drive member 204 is arranged in the carrier 2, and two symmetrically arranged hydraulic cylinders 5 for providing pressure for the slope pressure support component 1 are installed on the top of the lifting drive member 204; the output ends of the two hydraulic cylinders 5 are fixedly connected to a slot frame 6, the slot frame 6 is provided with a slot body 601 with a top opening and used for the slope pressure support component 1 to be plugged in; the slot frame 6 is fixedly connected to a permanent magnet 3 through a connecting frame 4; a locking component 8, the slope pressure support component 1 has a plug-in positioning portion that can be magnetically attracted by the permanent magnet 3, and a locking component 8 is arranged at the plug-in positioning portion; an unlocking component 7, the unlocking component 7 is installed on the connecting frame 4, the unlocking component 7 has a driving portion, and the driving portion is arranged in the slot body 601.

[0048] like Figure 1-3 As shown, as a specific technical solution, the slope pressure support assembly 1 includes a retaining plate 101, a sleeve 102, a straight rod 103 and an end edge plate 104; the number of the retaining plates 101 is two, and the two retaining plates 101 are respectively arranged at the two ends of the straight rod 103, and a sleeve 102 is fixedly connected to the plate surface of the two retaining plates 101 facing the straight rod 103, and the two sleeves 102 are respectively sleeved to the two ends of the straight rod 103; the end of the sleeve 102 away from the retaining plate 101 is fixedly connected to the end edge plate 104 for inserting into the trough body 601; the plug-in positioning part includes a sleeve 106, a first spring 107 and an iron plug post 105; The sleeve 106 is fixedly installed to the front side of one end of the sleeve 102 near the end of the plate 104. A guide hole is opened on the wall of the sleeve 102. The sleeve 106 is connected with the inside of the sleeve 102 through the guide hole. The iron plug post 105 is inserted into the sleeve 106, and the iron plug post 105 is connected with the guide hole with a clearance fit. The first spring 107 is sleeved on the iron plug post 105, and the first spring 107 is located in the sleeve 106. One end of the first spring 107 is fixedly connected to the iron plug post 105, and the other end of the first spring 107 is fixedly connected to the outer wall of the sleeve 102; the rod surfaces on both sides of the straight rod 103 are opened with a plurality of equally spaced holes 108 along the length direction.

[0049] The carrier 2 is moved to move the hydraulic cylinder 5 to the bottom of the slope pressure support assembly 1 where pressure needs to be applied or released. The hydraulic cylinder 5 is extended and retracted to drive the end edge plate 104 to move, so that the top opening of the trough body 601 is aligned with the bottom end of the end edge plate 104. Then, the lifting drive 204 drives the hydraulic cylinder 5 to move upward, and the slot frame 6 moves with the hydraulic cylinder 5 to connect the trough body 601 with the end edge plate 104.

[0050] During the above process, the permanent magnet 3 and the connecting frame 4 move together with the slot frame 6. After the slot body 601 is plugged into the end edge plate 104, the permanent magnet 3 is aligned with the end of the iron plug post 105. The iron plug post 105 is moved by the magnetic attraction of the permanent magnet 3 on the iron plug post 105, and the iron plug post 105 is pulled out from the insertion hole 108, thereby releasing the positioning between the sleeve 102 and the straight rod 103. At the same time, the iron plug post 105 moves to stretch the first spring 107, and the first spring 107 produces a tensile deformation; after the positioning is released, the slot frame 6 drives the end edge plate 104 to move together through the extension or contraction of the hydraulic cylinder 5, so that the sleeve 102 slides on the straight rod 103, and the retaining plate 101 moves together with the sleeve 102 to press the slope or separate from the slope.

[0051] In the process of compacting the slope, after the retaining plate 101 fits the slope, the iron plug 105 is aligned with a plug hole 108 on the straight rod 103 by continuing to apply pressure, and then the hydraulic cylinder 5 is driven downward by the lifting drive 204. Since the trough 601 has a certain depth vertically, the end plate 104 is still inserted in the trough 601 after the permanent magnet 3 is separated from the iron plug 105 to provide a limit position. Figure 5-6 In the state shown, the permanent magnet 3 is separated from the iron plug 105, and the iron plug 105 loses its magnetic attraction. The iron plug 105 is inserted into the socket 108 through the elastic force of the first spring 107 for positioning. In summary, before the end edge plate 104 is separated from the slot body 601, the plug-in positioning part has positioned the slope pressure support assembly 1.

[0052] After the above-mentioned pressing is completed, the carrier 2 is moved to perform the pressing operation at the next position or release the pressing operation.

[0053] like Figure 8 As shown, as a specific technical solution, the carrier 2 includes a seat body 201 and casters 202, and the casters 202 are installed at the four corners of the bottom of the seat body 201. The lifting drive member 204 is fixedly installed in the seat body 201, and the output shaft end of the lifting drive member 204 is fixedly connected with a connecting plate 203, and the connecting plate 203 is fixedly connected to the bottom of the hydraulic cylinder 5, and the bottom end of the connecting plate 203 is connected with a guide groove opened on the seat body 201 with a clearance fit.

[0054] The carrier 2 is moved by casters 202, and the lifting drive member 204 can adopt telescopic elements such as electric push rods 708. A controller and a power supply are also provided in the carrier 2 for power supply and electrical control. The hydraulic cylinder 5 can be driven by providing an electric hydraulic pump in the carrier 2. The electric hydraulic pump converts electrical energy into hydraulic energy and transports the hydraulic oil to the hydraulic cylinder 5 through a pipeline, thereby driving the piston to move.

[0055] like Figure 7As shown, as a specific technical solution, the locking assembly 8 includes a first movable block 802, a second movable block 806 and a positioning rod 807; a vertical hole is provided on the wall of the sleeve 102, and the top of the hole is connected to the guide hole, the positioning rod 807 is connected with the hole body with clearance, the bottom of the iron plug 105 is provided with a positioning hole 1051 adapted to be inserted into the positioning rod 807, the bottom end of the positioning rod 807 is fixedly connected to the second movable block 806, the top of the second movable block 806 is elastically connected to the bottom of the sleeve 102, the first movable block 802 is connected to the bottom of the sleeve 102 by a longitudinal elastic member, and the first movable block 802 and the second movable block 806 are respectively provided with a first The first inclined surface and the second inclined surface are in contact with each other; the locking assembly 8 also includes a fourth spring 808, the bottom end of the fourth spring 808 is fixedly connected to the top of the second movable block 806, and the top end of the fourth spring 808 is fixedly connected to the bottom surface of the sleeve 102; the longitudinal elastic member includes a fixed plate 801, a third spring 803, a guide rod 804 and a stopper 805; the fixed plate 801 is fixedly connected to the bottom surface of the sleeve 102, a guide hole is provided on the fixed plate 801, the guide rod 804 is connected with the guide hole with a clearance fit, and one end of the guide rod 804 is fixedly connected to the first movable block 802, and the other end of the guide rod 804 is fixedly connected to the stopper 805, and the third spring 803 is sleeved on the guide rod 804.

[0056] The locking assembly 8 is inserted into the positioning hole 1051 on the iron plug column 105 through the positioning rod 807, providing positioning for the iron plug rod, thereby improving the positioning effect of the slope pressure support assembly 1.

[0057] like Figure 6-7 As shown in the figure, as a specific technical solution, the driving part of the unlocking assembly 7 includes a driving rod 701 located in the slot body 601 and a first piston 702 fixed to the bottom end of the driving rod 701; an oil chamber 703 is provided in the embedded slot frame 6, a connecting hole is provided between the oil chamber 703 and the slot body 601, the driving rod 701 is connected with the connecting hole through a clearance fit, the first piston 702 is connected to the oil chamber 703, and a second spring 704 is provided at the bottom of the first piston 702. The two ends of the second spring 704 are respectively in contact with the bottom of the first piston 702 and the bottom cavity wall of the oil cavity 703; the unlocking assembly 7 includes a cylinder 706 and an oil pipe 705; a second piston 707 is connected to the cylinder 706, a push rod 708 is fixed to the middle of the second piston 707, and the push rod 708 extends to the outside of the cylinder 706, one end of the oil pipe 705 is connected to the cylinder 706, and the other end of the oil pipe 705 is connected to the bottom of the oil cavity 703.

[0058] The unlocking component 7 is matched with the locking component 8, and the locking component 8 is unlocked and driven by the unlocking component 7.

[0059] The specific operation is as follows: during the plugging process between the tank body 601 and the end edge plate 104, Figure 5-6 As shown, this is the initial plug-in state, the bottom end of the end edge plate 104 has just been inserted into the slot 601, the bottom end of the end edge plate 104 has just contacted the top end of the driving rod 701, and the unlocking component 7 and the locking component 8 are now as Figure 7 As shown, the slot frame 6 continues to move upward, and during the process of the end plate 104 going deeper into the slot body 601, the driving rod 701 is pressed downward, and the driving rod 701 drives the first piston 702 to move downward, and at the same time compresses the second spring 704 to press down the oil in the oil chamber 703, and the oil pressure acts on the cylinder 706 through the oil pipe 705 to provide pressure for the second piston 707, and the oil pushes the second piston 707 to move, thereby driving the push rod 708 to push the first movable block 802 to move. The first movable block 802 has a sufficient vertical length. When the unlocking component 7 moves upward with the permanent magnet 3 and the connecting frame 4, the push rod 708 is always in contact with the first movable block 802, and the first movable block 802 moves to compress the third spring 803. The second movable block 806 and the first movable block 802 are as shown in FIG. Figure 7 As shown, after the first movable block 802 moves, the second movable block 806 uses the compression force of the fourth spring 808 to keep the first inclined surface and the second inclined surface of the second movable block 806 always in contact with each other, so that the second movable block 806 drives the positioning rod 807 to be pulled out of the positioning hole 1051 to release the lock.

[0060] After unlocking, the end edge plate 104 continues to go deeper into the slot body 601 until the permanent magnet 3 is aligned with the iron plug 105, so that the permanent magnet 3 is aligned with the iron plug 105 only after the iron plug 105 is unlocked; after unlocking, the end edge plate 104 continues to go deeper into the slot body 601, and the unlocking component 7 is still driven by the downward pressure of the end edge plate 104, and the first movable block 802 continues to move, and the second movable block 806 uses the elastic force of the fourth spring 808 to make the second inclined surface abut against the first inclined surface until the fourth spring 808 returns to a non-compressed state, and the second movable block 806 maintains this position and does not continue to descend, the second inclined surface is aligned with the first inclined surface, and the first movable block 802 continues to move and separates from the second movable block 806.

[0061] When re-locking, the end edge plate 104 is pulled out from the slot body 601, the permanent magnet is first separated from the iron plug rod, and the iron plug rod loses magnetic attraction and returns to the state as shown in FIG. Figure 7 In the unlocking assembly 7, the first piston 702 and the driving rod 701 move upward by the elastic force of the second spring 704, so that the oil chamber 703 absorbs the oil in the cylinder body 706 through the oil delivery pipe 705, and drives the second piston 707 and the push rod 708 to return to the state as shown in the figure. Figure 7The first movable block 802 is reset by the elastic force of the third spring 803 until the stopper 805 contacts the fixed plate 801 and returns to the state as shown in FIG. Figure 7 The first movable block 802 moves, the first inclined surface contacts the second inclined surface of the second movable block 806, and the first movable block 802 continues to move. Through the extrusion effect, the second movable block 806 drives the positioning rod 807 to move upward, and at the same time compresses the fourth spring 808, and the positioning rod 807 is inserted into the positioning hole 1051 to achieve automatic locking.

[0062] The present invention is not limited to the above-mentioned embodiments. Any changes in shape or structure are within the protection scope of the present invention. The protection scope of the present invention is defined by the attached claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications are within the protection scope of the present invention.

Claims

1. A tunnel foundation pit slope pressure support mechanism, comprising a slope pressure support assembly (1); characterized in that: The number of the slope pressure support components (1) is several, and also includes: A carrier (2), the carrier (2) being movable, a lifting drive member (204) being arranged inside the carrier (2), two symmetrically arranged hydraulic cylinders (5) being installed on the top of the lifting drive member (204) for providing pressure to the slope pressure support assembly (1); the output ends of the two hydraulic cylinders (5) are both fixedly connected to an embedding slot frame (6), the embedding slot frame (6) being provided with a slot body (601) having a top opening and being used for inserting the slope pressure support assembly (1); the embedding slot frame (6) is fixedly connected to a permanent magnet (3) via a connecting frame (4); A locking component (8), wherein the slope pressure support component (1) has a plug-in positioning portion that can be magnetically attracted by a permanent magnet (3), and a locking component (8) is arranged at the plug-in positioning portion; An unlocking component (7), wherein the unlocking component (7) is mounted on the connecting frame (4), and the unlocking component (7) has a driving part, and the driving part is arranged in the slot body (601).

2. A tunnel foundation pit slope pressure support mechanism as claimed in claim 1, characterized in that: The slope pressure support assembly (1) comprises a retaining plate (101), a sleeve (102), a straight rod (103) and an end edge plate (104); the number of the retaining plates (101) is two, and the two retaining plates (101) are respectively arranged at the two ends of the straight rod (103); a sleeve (102) is fixedly connected to the plate surface of the two retaining plates (101) facing the straight rod (103), and the two sleeves (102) are respectively sleeved on the two ends of the straight rod (103); the end of the sleeve (102) away from the retaining plate (101) is fixedly connected to the end edge plate (104) for inserting into the trough body (601).

3. A tunnel foundation pit slope pressure support mechanism as claimed in claim 2, characterized in that: The plug-in positioning portion comprises a sleeve (106), a first spring (107) and an iron plug post (105); the sleeve (106) is fixedly installed on the front side of one end of the sleeve (102) near the end along the plate (104); a guide hole is opened on the wall of the sleeve (102); the sleeve (106) is connected with the sleeve (102) through the guide hole; the iron plug post (105) is inserted into the sleeve (106), and the iron plug post (105) is connected with the guide hole with a clearance fit; the first spring (107) is sleeved on the iron plug post (105), and the first spring (107) is located in the sleeve (106); one end of the first spring (107) is fixedly connected to the iron plug post (105), and the other end of the first spring (107) is fixedly connected to the outer wall of the sleeve (102).

4. A tunnel foundation pit slope pressure support mechanism as claimed in claim 3, characterized in that: The rod surfaces on both sides of the straight rod (103) are provided with a plurality of insertion holes (108) distributed at equal intervals along the length direction.

5. The tunnel foundation pit slope pressure support mechanism according to claim 1, characterized in that: The carrier (2) comprises a seat body (201) and casters (202), the casters (202) being installed at the four corners of the bottom of the seat body (201), the lifting drive member (204) being fixedly installed in the seat body (201), and the output shaft end of the lifting drive member (204) being fixedly connected to a connecting plate (203), the connecting plate (203) being fixedly connected to the bottom of the hydraulic cylinder (5), and the bottom end of the connecting plate (203) being loosely connected to a guide groove provided on the seat body (201).

6. A tunnel foundation pit slope pressure support mechanism as claimed in claim 3, characterized in that: The locking assembly (8) comprises a first movable block (802), a second movable block (806) and a positioning rod (807); a vertical hole is formed on the wall of the sleeve (102), and the top of the hole is connected to the guide hole; the positioning rod (807) is connected to the hole with a clearance fit; a positioning hole (1051) adapted for inserting the positioning rod (807) is formed on the bottom of the iron plug column (105); the bottom end of the positioning rod (807) is fixedly connected to the second movable block (806); the top of the second movable block (806) is elastically connected to the bottom of the sleeve (102); the first movable block (802) and the bottom of the sleeve (102) are connected via a longitudinal elastic member; the first movable block (802) and the second movable block (806) are respectively provided with a first inclined surface and a second inclined surface, and the first inclined surface and the second inclined surface are in contact with each other.

7. A tunnel foundation pit slope pressure support mechanism as claimed in claim 6, characterized in that: The locking assembly (8) further comprises a fourth spring (808), the bottom end of the fourth spring (808) being fixedly connected to the top of the second movable block (806), and the top end of the fourth spring (808) being fixedly connected to the bottom surface of the sleeve (102).

8. A tunnel foundation pit slope pressure support mechanism as claimed in claim 6, characterized in that: The longitudinal elastic member comprises a fixed plate (801), a third spring (803), a guide rod (804) and a stop seat (805); the fixed plate (801) is fixedly connected to the bottom surface of the sleeve (102); a guide hole is provided on the fixed plate (801); the guide rod (804) is connected to the guide hole with a clearance fit; one end of the guide rod (804) is fixedly connected to the first movable block (802); the other end of the guide rod (804) is fixedly connected to the stop seat (805); and the third spring (803) is sleeved onto the guide rod (804).

9. The tunnel foundation pit slope pressure support mechanism according to claim 1, characterized in that: The driving part of the unlocking assembly (7) comprises a driving rod (701) located in the groove body (601) and a first piston (702) fixed to the bottom end of the driving rod (701); an oil chamber (703) is provided in the embedded groove frame (6); a connecting hole is provided between the oil chamber (703) and the groove body (601); the driving rod (701) is connected to the connecting hole with a clearance; the first piston (702) is connected to the oil chamber (703); a second spring (704) is provided at the bottom of the first piston (702); two ends of the second spring (704) are respectively in contact with the bottom of the first piston (702) and the bottom cavity wall of the oil chamber (703).

10. A tunnel foundation pit slope pressure support mechanism as claimed in claim 9, characterized in that: The unlocking assembly (7) includes a cylinder (706) and an oil delivery pipe (705); a second piston (707) is connected to the cylinder (706), a push rod (708) is fixed to the middle of the second piston (707), and the push rod (708) extends to the outside of the cylinder (706), one end of the oil delivery pipe (705) is connected to the cylinder (706), and the other end of the oil delivery pipe (705) is connected to the bottom of the oil chamber (703).

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