Tunnel weak surrounding rock supporting device

Abstract

The utility model discloses a tunnel weak surrounding rock supporting device which comprises a supporting frame, an arc-shaped support, a fixed circular plate, a fixed rod, a connecting plate, a movable plate and a limiting plate, an electric push rod is fixedly installed on the outer surface of the limiting plate, one end of the electric push rod is connected with the connecting rod, one end of the connecting rod is connected with a supporting piece, and the supporting piece is connected with the arc-shaped support. First locking plates are fixedly installed on the outer surfaces of the two sides of the supporting piece, the second locking plates and the inner walls of the two sides of the tunnel are fixedly connected together through bolts, an arc-shaped support can adapt to the outer surface of the top end of the tunnel, and then an electric push rod is driven, so that the length of a connecting rod can be adjusted at one end of the electric push rod; therefore, the supporting piece can conduct fixed-point supporting, the supporting structure can be flexibly adjusted according to actual needs, different engineering requirements are met, local supporting of the tunnel structure is achieved through fixed-point supporting of the supporting piece, accurate supporting of surrounding rock can be improved, and the concentration ratio of structural stress points is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tunnel soft weak surrounding rock support technical field, and specifically relates to a tunnel soft weak surrounding rock support device. BACKGROUND

[0002] Water conveying tunnels in municipal and water conservancy projects and traffic engineering tunnels often face the challenge of soft surrounding rock. Soft surrounding rock has various characteristics, including weak rock quality, low bearing capacity, joint fissure development, and structure fragmentation, resulting in loose and broken surrounding rock, poor cohesion, low strength, easy softening and easy collapse when encountering water. When tunnel excavation is carried out in soft surrounding rock areas, if the soft surrounding rock is not effectively reinforced, deformation and collapse of the surrounding rock may occur during construction, seriously affecting construction safety.

[0003] Tunnel soft surrounding rock support is a crucial link in underground engineering. In order to deal with the stability and safety problems that may be caused by soft surrounding rock, various support devices are often used. Among them, shotcrete support, anchor support and steel arch support are common choices. In these choices, steel arch support installs a solid steel arch or arch structure to strengthen and support the top and sidewall of the tunnel. Traditional steel arch support can provide relatively balanced support for the entire tunnel, but there are some challenges in the top end area of the tunnel inner wall, which requires additional independent support points to ensure stable support, which cannot be achieved by existing steel arch support. The lack of additional independent support points may cause instability in tunnel construction in soft surrounding rock areas, thereby increasing the possibility of accidents and safety hazards. SUMMARY

[0004] The utility model aims at providing a tunnel soft weak surrounding rock support device.

[0005] The tunnel soft weak surrounding rock support device comprises a support frame, a plurality of groups of arc-shaped supports are fixedly installed at the top end of the support frame, a plurality of groups of fixed circular plates are fixedly installed at the top surface of the support frame, a fixed rod is fixedly installed between the plurality of groups of fixed circular plates, a plurality of groups of connecting plates are fixedly installed on the outer surface of the plurality of groups of fixed circular plates, a movable plate is movably installed in the inner wall of the plurality of groups of connecting plates, a limiting plate is fixedly installed at the top end of the movable plate, an electric push rod is fixedly installed on the outer surface of the limiting plate, a connecting rod is connected to one end of the electric push rod, a support piece is connected to one end of the connecting rod, a first locking plate is fixedly installed on the outer surface of the support piece on both sides, and a screw hole is formed in the outer surface of the first locking plate.

[0006] Preferably, a plurality of groups of grooves are formed in the outer surface of the support piece, and a first spring is installed in each of the plurality of groups of grooves, one end of the first spring is connected to an expansion pin, and the outer surface of the expansion pin is wrapped with rubber.

[0007] Preferably, the outer surfaces of the plurality of sets of connecting plates are provided with screw rods, and the outer surfaces of one ends of the screw rods are movably provided with nuts.

[0008] Preferably, the top ends of the support frames are fixedly provided with a plurality of reinforcing rods, and the two sides of the support frames are fixedly provided with a plurality of second locking plates, and the outer surfaces of the plurality of sets of second locking plates are provided with screw holes.

[0009] Preferably, the bottom ends of the support frames are provided with support bases, the inner walls of the support bases are provided with cavities, the inner walls of the cavities of the support bases are provided with second springs, one ends of the second springs are connected with damping rods, and the top ends of the damping rods are connected with the support frames.

[0010] Preferably, the bottom ends of the support bases are wrapped with rubber.

[0011] From the above technical solutions, the present application has the following beneficial effects:

[0012] The second locking plates and the inner walls of the two sides of the tunnel are fixedly connected together through bolts, the arc-shaped supports can adapt to the outer surfaces of the top ends of the tunnel, the length of the connecting rods at one end of the electric push rods can be adjusted through the electric push rods, and then the support members can be supported at fixed points, which is helpful for flexibly adjusting the support structure according to actual needs, adapting to different engineering requirements, and realizing local support of the tunnel structure through the fixed-point support of the support members, which is helpful for improving the accurate support of the surrounding rock and reducing the concentration of the structure stress points.

[0013] The second springs and the damping rods are helpful for absorbing the underground pressure changes and vibrations caused by the deformation of the tunnel, improving the resistance of the support system to external disturbances, and reducing the adverse effects on the structure. SUMMARY

[0014] Figure 1 It is a first three-dimensional structure schematic view of the utility model;

[0015] Figure 2 It is a second three-dimensional structure schematic view of the utility model;

[0016] Figure 3 It is a support frame of the utility model; Figure 1 It is an enlarged schematic view of A in the utility model;

[0017] Figure 4 It is a support base of the utility model; Figure 1 It is an enlarged schematic view of B in the utility model;

[0018] Figure 5 It is a connecting rod of the utility model; Figure 2 It is an enlarged schematic view of C in the utility model;

[0019] Figure 6 It is a second spring of the utility model; Figure 2An enlarged schematic view at D;

[0020] Figure 7 For the utility model Figure 2 An enlarged schematic view at E.

[0021] In the figure: 1, support frame; 2, arc-shaped support; 3, fixed circular plate; 4, fixed rod; 5, connecting plate; 6, movable plate; 7, limiting plate; 8, electric push rod; 9, screw rod; 911, nut; 811, support; 812, first locking plate; 813, telescopic pin; 814, connecting rod; 111, support base; 112, second locking plate; 113, reinforcing rod; 114, damping rod. DETAILED DESCRIPTION

[0022] The tunnel soft surrounding rock supporting device, including support frame 1, the top of support frame 1 is fixedly installed with multiple groups of arc-shaped supports 2, and the top surface middle end of support frame 1 is fixedly installed with multiple groups of fixed circular plates 3, multiple groups of fixed circular plates 3 are fixedly installed with fixed rods 4 between, the outer surface of multiple groups of fixed circular plates 3 is fixedly installed with multiple groups of connecting plates 5, and the inner wall of multiple groups of connecting plates 5 is movably installed with movable plates 6, the top of movable plate 6 is fixedly installed with limiting plates 7, and the outer surface of limiting plate 7 is fixedly installed with electric push rods 8, one end of electric push rod 8 is connected with connecting rod 814, and one end of connecting rod 814 is connected with support 811, the outer surface of both sides of support 811 is fixedly installed with first locking plate 812, and the outer surface of first locking plate 812 is provided with screw hole.

[0023] The outer surface of support 811 is provided with multiple groups of grooves, and first spring is installed in multiple groups of grooves, one end of first spring is connected with telescopic pin 813, and the outer surface of telescopic pin 813 is wrapped with rubber, through the action of first spring, telescopic pin 813 can be adjusted, so that support 811 can adapt to different tunnel wall surfaces when being combined in the inner wall of tunnel top, and the adaptability of supporting system is improved.

[0024] The outer surface of multiple groups of connecting plates 5 is provided with screw rod 9, and nut 911 is movably installed on the outer surface of one end of screw rod 9, multiple groups of connecting plates 5 are movably connected with movable plate 6, so that electric push rod 8 can be adjusted in angle, and after position adjustment, they can be kept firm and stable through rotating nut 911.

[0025] The top end of the support frame 1 is fixedly provided with a plurality of reinforcing rods 113, and the two sides of the support frame 1 are fixedly provided with a plurality of second locking plates 112, the outer surfaces of the plurality of second locking plates 112 are provided with screw holes, the support frame can be installed on the inner walls of the two sides of the tunnel through the connection of the bolts and the second locking plates 112, the top ends of the plurality of reinforcing rods 113 are fixedly installed on the top end of the support frame 1, the overall stability of the support system is increased, these reinforcing rods 113 help to disperse and transmit underground pressure and improve the load-bearing capacity of the support structure.

[0026] The bottom end of the support frame 1 is provided with a support base 111, and the inner wall of the support base 111 is provided with a cavity, a second spring is installed in the inner wall cavity of the support base 111, one end of the second spring is connected with a damping rod 114, the top end of the damping rod 114 is connected with the support frame 1, the second spring and the damping rod 114 help to absorb the vibration caused by the change of underground pressure and the deformation of the tunnel, improve the resistance of the support system to external disturbance, and reduce the adverse effects on the structure.

[0027] The bottom end of the support base 111 is wrapped with rubber, which helps to improve the anti-slip property of the support base in contact with the ground surface and prevent the base from moving due to uneven or changing ground surface during underground engineering construction.

[0028] Working principle: the second locking plate 112 is fixedly connected with the inner walls of the two sides of the tunnel through bolts, and the arc-shaped support 2 can adapt to the outer surface of the top end of the tunnel, then the length of the connecting rod 814 at one end of the electric push rod 8 can be adjusted by driving the electric push rod 8, and then the support piece 811 can be supported at a fixed point, which helps to flexibly adjust the support structure according to actual needs, adapts to different engineering requirements, and through the fixed-point support of the support piece 811, local support of the tunnel structure is realized, and through the action of the first spring, the telescopic pin 813 can be adjusted, so that the support piece 811 can adapt to different tunnel wall surfaces when abutting against the inner wall of the top end of the tunnel, and the adaptability of the support system is improved.

Claims

1. A tunnel weak surrounding rock supporting device, comprising a support frame (1), characterized in that: The top end of the support frame (1) is fixedly provided with a plurality of arc-shaped supports (2), and the top surface of the support frame (1) is fixedly provided with a plurality of fixed circular plates (3) at the middle end, a plurality of fixed rods (4) are fixedly installed between the plurality of fixed circular plates (3), a plurality of connecting plates (5) are fixedly installed on the outer surfaces of the plurality of fixed circular plates (3), and a movable plate (6) is movably installed on the inner wall of the plurality of connecting plates (5), a limiting plate (7) is fixedly installed on the top end of the movable plate (6), an electric push rod (8) is fixedly installed on the outer surface of the limiting plate (7), one end of the electric push rod (8) is connected with a connecting rod (814), one end of the connecting rod (814) is connected with a supporting piece (811), and the outer surfaces of the two sides of the supporting piece (811) are fixedly provided with first locking plates (812), and screw holes are formed in the outer surfaces of the first locking plates (812).

2. A tunnel weak surrounding rock supporting device according to claim 1, characterized in that: A plurality of grooves are formed in the outer surface of the supporting piece (811), and a first spring is installed in each groove, one end of the first spring is connected with an expansion pin (813), and the outer surface of the expansion pin (813) is wrapped with rubber.

3. The tunnel soft surrounding rock supporting device according to claim 1, characterized in that: The outer surfaces of the plurality of connecting plates (5) are provided with screw rods (9), and the outer surfaces of one ends of the screw rods (9) are movably provided with nuts (911).

4. The tunnel soft surrounding rock supporting device according to claim 1, characterized in that: The top end of the support frame (1) is fixedly provided with a plurality of reinforcing rods (113), and the two sides of the support frame (1) are fixedly provided with a plurality of second locking plates (112), and screw holes are formed in the outer surfaces of the plurality of second locking plates (112).

5. The device for supporting weak surrounding rock of a tunnel according to claim 1, characterized in that: The bottom end of the support frame (1) is provided with a support base (111), and a cavity is formed in the inner wall of the support base (111), a second spring is installed in the cavity of the inner wall of the support base (111), and one end of the second spring is connected with a damping rod (114), and the top end of the damping rod (114) is connected with the support frame (1).

6. A tunnel soft surrounding rock supporting device according to claim 5, characterized in that: The bottom end of the support base (111) is wrapped with rubber.

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