Supporting structure for tunnel excavation

Abstract

The utility model discloses a supporting structure for tunnel excavation, and particularly relates to a tunnel support, which comprises an arched I-shaped steel beam lined at the top of the inner side of a tunnel and a combined supporting stand column fixed on the side wall of the tunnel, the telescopic end of the hydraulic jacking rod is fixedly connected with the end part of the arched I-shaped steel beam through a bolt; penetrating lugs are symmetrically welded to a machine body of the hydraulic jacking rod, and the anchor rod penetrates through the penetrating lugs and is implanted into a rock mass of a tunnel. The utility model has good adaptability and expandability, and can be flexibly adjusted according to the actual excavation condition and geological condition of the tunnel so as to meet different construction requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel support, concretely relates to a support structure of tunnel excavation. BACKGROUND

[0002] Tunnel is excavated by shield machine, and needs to be supported by temporary support before the concrete support pouring of tunnel interior is carried out by lining trolley, so as to prevent collapse.

[0003] Therefore, how to provide good temporary support to the inner wall of the excavated tunnel before the lining trolley construction is expected to be well solved. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a support structure of tunnel excavation, which is used to solve the above problems.

[0005] In order to realize the above purpose, the utility model provides the following technical scheme:

[0006] A support structure of tunnel excavation, comprising an arched I-beam lined on the top of the inner side of the tunnel and a support combined column fixed on the side wall of the tunnel, wherein the support combined column comprises a hydraulic jacking rod, the telescopic end of the hydraulic jacking rod is fixedly connected with the end of the arched I-beam through bolts.

[0007] The machine body of the hydraulic jacking rod is symmetrically welded with a through ear, and further comprises an anchor rod, which passes through the through ear and is implanted into the rock mass of the tunnel.

[0008] As a preferred, it further comprises a first I-beam, the first mounting seat is symmetrically fixedly installed on the inner wall of the arched I-beam, and the waist-shaped connecting piece is fixedly connected between the first I-beam and the first mounting seat.

[0009] As a preferred, the second mounting seat is fixedly installed on the first I-beam through bolts, the support I-beam is hingedly connected with the third mounting seat fixedly installed on the machine body of the hydraulic jacking rod.

[0010] As a preferred, the second I-beam is fixedly installed between the two support I-beams through bolts.

[0011] As a preferred, the support combined column comprises a support column, the recess is formed on one side of the adjacent support column, the machine body of the hydraulic jacking rod is hingedly connected with the hinged ear welded on the top of the support column, and the hydraulic jacking rod in the retracted state can be embedded into the recess.

[0012] As preferred, a base is welded at the bottom of the support column, and the bottom of the base is threadedly connected with threaded rods in diagonal lines, and the four threaded rods are rotationally provided with footboards.

[0013] As preferred, a wooden base is fixedly arranged at the bottom of the footboard.

[0014] In the above technical solution, the tunnel excavation support structure provided by the utility model has the following beneficial effects: the support structure is not only structurally stable, but also can effectively support the top and sidewall of the tunnel to prevent rock collapse, and the connection between components is flexible, facilitating installation and adjustment, greatly shortening the construction period and reducing the construction cost. In addition, the support structure also has good adaptability and expandability, and can be flexibly adjusted according to the actual excavation situation and geological conditions of the tunnel to meet different construction requirements. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0016] Fig. 1 The structural diagram of the tunnel support provided by the utility model embodiment is shown in the figure.

[0017] Fig. 2 The structural diagram of the base and the groove provided by the utility model embodiment is shown in the figure.

[0018] Explanation of reference signs:

[0019] 1, arched I-shaped steel beam; 2, support combined column; 21, support column; 22, groove; 23, hinged lug; 24, base; 25, threaded rod; 26, footboard; 3, hydraulic jacking rod; 31, through lug; 4, anchor rod; 5, first I-shaped cross beam; 51, first mounting seat; 52, waist-shaped connecting piece; 6, second mounting seat; 61, third mounting seat; 62, support I-shaped rigid beam; 7, second I-shaped cross beam. DETAILED DESCRIPTION

[0020] In order to make those skilled in the art better understand the technical solutions of the utility model, the utility model will be further described in detail in combination with the drawings.

[0021] As Figs. 1-2As shown in the tunnel excavation support structure, an arched I-beam 1 is lined on the inside top of the tunnel, and a support combined column 2 is fixed to the side wall of the tunnel, the support combined column 2 comprises a hydraulic jacking rod 3, and the telescopic end of the hydraulic jacking rod 3 is fixedly connected with the end of the arched I-beam 1 through bolts.

[0022] The machine body of the hydraulic jacking rod 3 is symmetrically welded with a through ear 31, and an anchor rod 4 passes through the through ear 31 and is implanted into the rock mass of the tunnel.

[0023] Specifically, the arched I-beam 1 is lined on the inside top of the tunnel, and the support combined column 2 is fixed to the side wall of the tunnel. The telescopic end of the hydraulic jacking rod 3 is fixedly connected with the end of the arched I-beam 1 through bolts, the machine body of the hydraulic jacking rod 3 is symmetrically welded with a through ear 31, and the anchor rod 4 passes through the through ear 31 and is implanted into the rock mass of the tunnel. So that the support structure can firmly support the top of the tunnel and prevent rock collapse. At the same time, the combination of the hydraulic jacking rod 3 and the anchor rod 4 provides a flexible support and fixing mode, which can adapt to the construction requirements under different geological conditions.

[0024] As a further provided embodiment of the utility model, it further comprises a first I-beam 5, the first I-beam 5 is fixedly installed on the inner wall of the arched I-beam 1, and a waist-shaped connecting piece 52 is connected between the first I-beam 5 and the first mounting seat 51.

[0025] Specifically, the addition of the first I-beam 5 enhances the overall stability of the support structure and improves the support capacity. The design of the waist-shaped connecting piece 52 makes the connection between the beam and the mounting seat more flexible and firm.

[0026] As a further provided embodiment of the utility model, a second mounting seat 6 is fixedly installed on the first I-beam 5 through bolts, a support I-beam 62 connected with the third mounting seat 61 fixedly installed on the machine body of the hydraulic jacking rod 3 is hingedly connected to the second mounting seat 6.

[0027] Specifically, the arrangement of the support I-beam 62 further enhances the stability and support capacity of the support structure. Through the hinged connection, the support beam can be flexibly adjusted according to the actual situation, improving the adaptability and flexibility of the support structure.

[0028] As a further provided embodiment of the utility model, a second I-beam 7 is fixedly installed between the two support I-beams 62 through bolts.

[0029] Specifically, the addition of the second I-beam 7 further enhances the overall rigidity and stability of the support structure, improving the support effect. At the same time, the bolt connection mode makes the installation and disassembly of the beam more convenient and fast.

[0030] As further provided by the utility model, the support combined column 2 comprises support columns 21, recesses 22 are formed on the adjacent sides of the two support columns 21, the body of the hydraulic jacking rod 3 is hinged to the hinge ears 23 welded on the top of the support columns 21, and the retracted hydraulic jacking rod 3 can be embedded in the recesses 22.

[0031] Specifically, the hydraulic jacking rod 3 can be conveniently stored in the recesses 22 when not in use, saving space. Meanwhile, the hinge mode enables the hydraulic jacking rod 3 to be flexibly adjusted in angle and height, improving the adaptability and flexibility of the support structure.

[0032] As further provided by the utility model, the bottom of the support column 21 is welded with a base 24, the bottom of the base 24 is threadedly connected with threaded rods 25 along opposite diagonals, the four threaded rods 25 are each rotationally provided with a footboard 26, and the bottom of the footboard 26 is fixedly provided with a wooden base.

[0033] Specifically, the design of the base 24 and the threaded rods 25 enables the support combined column 2 to be firmly fixed on the ground, improving the stability of the support structure. The provision of the footboard 26 facilitates the operation and movement of the construction personnel, improving the construction efficiency. The design of the wooden base enhances the load-bearing capacity and stability of the footboard 26, enabling the construction personnel to operate more safely. Meanwhile, the wooden base also has certain anti-skid effect, improving the construction safety.

[0034] The above only describes certain exemplary embodiments of the utility model by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the utility model for ordinary skilled persons in the art. Therefore, the above drawings and description are illustrative in nature and should not be understood as limiting the scope of protection claimed by the utility model.

Claims

1. A support structure for tunnel excavation, characterised in that, The utility model provides a tunnel support combined column, which comprises an arched I-beam (1) lined on the top of the inner side of a tunnel and a support combined column (2) fixed to the side wall of the tunnel, wherein the support combined column (2) comprises a hydraulic jacking rod (3), the telescopic end of the hydraulic jacking rod (3) is fixedly connected with the end of the arched I-beam (1) through bolts. A through ear (31) is symmetrically welded on the machine body of the hydraulic jacking rod (3), and an anchor rod (4) passes through the through ear (31) and is implanted into the rock mass of the tunnel.

2. A support structure for tunnel excavation according to claim 1, characterised in that, The utility model further comprises a first I-beam (5), wherein a first mounting seat (51) is symmetrically fixedly installed on the inner wall of the arched I-beam (1), and a waist-shaped connecting piece (52) fixedly connected through sympathetic bolts is arranged between the first I-beam (5) and the first mounting seat (51).

3. A support structure for the excavation of a tunnel according to claim 2, characterised in that, A second mounting seat (6) fixedly connected through bolts is symmetrically fixedly installed on the first I-beam (5), a support I-beam (62) fixedly connected with a third mounting seat (61) fixedly installed on the machine body of the hydraulic jacking rod (3) is hingedly connected to the second mounting seat (6).

4. A support structure for the excavation of a tunnel according to claim 3, characterised in that, A second I-beam (7) fixedly connected through bolts is fixedly installed between two support I-beams (62).

5. A support structure for tunnel excavation according to claim 1, wherein The support combined column (2) comprises a support column (21), recesses (22) are formed in the adjacent sides of the two support columns (21), the machine body of the hydraulic jacking rod (3) is hingedly connected to a hinged ear (23) welded on the top of the support column (21), and the hydraulic jacking rod (3) in the retracted state can be embedded into the recess (22).

6. A support structure for the excavation of a tunnel according to claim 5, characterised in that, A base (24) is welded on the bottom of the support column (21), and threaded rods (25) are screw-connected to the bottom of the base (24) along the diagonal lines, and four threaded rods (25) are rotatably provided with footboards (26).

7. A support structure for the excavation of a tunnel according to claim 6, characterised in that, Wooden bases are fixedly arranged on the bottom of the footboards (26).

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