Surrounding rock supporting device for deep-buried highway tunnel in complex goaf section

Abstract

The utility model provides a surrounding rock supporting device for a deep-buried highway tunnel in a complex goaf section, which relates to the technical field of tunnel surrounding rock supporting and comprises an arc-shaped steel sheet and an inner supporting frame, a plurality of groups of inner arc-shaped steel blocks are fixed on the inner side surface of the arc-shaped steel sheet, and a partition plate is fixed between two adjacent groups of inner arc-shaped steel blocks. Extrusion blocks are fixed to the inner side faces of inner arc-shaped steel blocks arranged on the left portion and the right portion of the inner side face of the arc-shaped steel sheet, an inner supporting frame is installed between the two sets of extrusion blocks on the left side and the right side, an upper supporting frame is fixed to the upper end of the inner supporting frame, the upper supporting frame is supported below the two sets of through holes in the upper side, and through holes are formed in the inner arc-shaped steel blocks. The partition plates are made of cast steel materials, and the extrusion blocks are made of rubber materials. The supporting surface of a tunnel rock wall is contacted more tightly and firmly, inner and outer supporting is firmer and more stable, the inner supporting frame and the side supporting frame can move in and out at the same time, and assembling is safer, more convenient and more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel surrounding rock support technical field, concretely relates to complex mined-out area section deep buried highway tunnel surrounding rock support device. BACKGROUND

[0002] Surrounding rock pre-support refers to a series of measures taken to reinforce and protect surrounding rock before tunnel excavation to improve the stability and safety of tunnel engineering. The main purposes include: enhancing tunnel structure stability, ensuring construction safety, prolonging tunnel service life, and reducing maintenance cost. Enhancing tunnel structure stability is achieved through pre-support, which can prevent surrounding rock collapse and thus enhance the stability of the tunnel structure. Ensuring construction safety is achieved by pre-reinforcing surrounding rock, which can reduce the risk of rock mass loosening and sliding, thereby improving the safety of the construction process. Prolonging the service life of the tunnel is achieved by pre-supporting the surrounding rock, which can reduce the deformation of the tunnel and prolong its service life. Effective surrounding rock pre-support can reduce the maintenance and repair cost of the tunnel. Anchor rod support is achieved by drilling anchor rods in surrounding rock and injecting solidifying material to improve the tensile strength of surrounding rock and enhance its stability. The selection of anchor rods needs to be based on the specific conditions of the tunnel, such as the length, diameter of the anchor rod, and the location of the anchor point, to achieve the best support effect.

[0003] In the prior art (publication number CN209083291U) a supporting device for large-span shallow-buried tunnel is mentioned in the description "including an arc-shaped top plate, a left support plate and a right support plate, the left and right support plates are respectively arranged at the left and right bottom ends of the arc-shaped top plate, the top end faces of the left and right support plates are respectively in contact with the left and right bottom end faces of the arc-shaped top plate, a plurality of rainwater guide grooves are arranged on the top face of the arc-shaped top plate, the left and right bottom ends of the arc-shaped top plate are provided with rectangular insertion slots, the top ends of the left and right support plates are connected with rectangular protrusions, and the rectangular protrusions are inserted into the rectangular insertion slots", but the existing technology supporting device is not stable for the lower support of the left and right support plates, and the support protection structure under the tunnel is not easy to enter and exit the support, the assembly and transportation strength is large, and it is not stable, convenient and practical. SUMMARY

[0004] To overcome the defects of the prior art, the complex mined-out area section deep buried highway tunnel surrounding rock support device is provided to solve the problem of the prior art supporting device, which is not stable for the lower support of the left and right support plates, and the support protection structure under the tunnel is not easy to enter and exit the support, the assembly and transportation strength is large, and it is not stable, convenient and practical.

[0005] In order to achieve the above object, the utility model provides complex mined-out section deep buried highway tunnel surrounding rock supporting device, including arc steel sheet and inner support frame, the inner side of arc steel sheet is fixed with multiple group inner arc steel block, and is fixed with the baffle between two adjacent group inner arc steel block, the inner side of inner arc steel block set up in the left and right parts of arc steel sheet inner side is fixed with extrusion piece, and two group extrusion pieces between left and right two sides are installed with inner support frame, the upper end of inner support frame is fixed with upper support frame, and upper support frame supports below two group through -hole on the upside.

[0006] Further, the inner arc steel block is provided with a through hole, the baffle is made of cast steel material, and the extrusion piece is made of rubber material.

[0007] Further, the outer side of the inner support frame is fixed with a side support frame at the lower part, and the lower end of the side support frame is fixed with a second bottom plate, and the lower end surface of the second bottom plate is installed with two groups of rollers.

[0008] Further, the inner support frame is fixed with a side fixed plate and an inclined support plate on the left and right sides of the lower end surface, and the upper parts of the left and right two groups of inclined support plates are fixed with a horizontal support plate.

[0009] Further, the outer side of the inclined support plate is fixed with a side fixed plate, and the side fixed plate and the inclined support plate are fixed with an upper connecting plate and a middle connecting plate.

[0010] Further, the lower end of the side fixed plate and the inclined support plate is fixed on the first bottom plate, and the lower end surface of the first bottom plate is installed with two groups of rollers.

[0011] Further, the lower surface of the upper support frame is provided with an upper arch plate, and the upper arch plate is a circular arc arch plate structure made of cast steel material.

[0012] The utility model discloses the beneficial effect lies in:

[0013] 1. The utility model discloses the setting of arc steel sheet is contacted with tunnel rock inner wall completely, and the support contact area is big, and then utilizes inner arc steel block and baffle to strengthen arc anti -deformation intensity, and the inner arc steel block, baffle assembly together is more convenient and fast.

[0014] 2. The setting of side support frame in the utility model is convenient to the stable support of arc steel sheet inner side lower part's inner arc steel block, baffle, and strengthens arc steel sheet lower part's support protection intensity.

[0015] 3. The setting of inner support frame in the utility model is to strengthen arc steel sheet's middle upper part support protection intensity, and inner support frame moves activity through the side support frame of bottom, and it is convenient and easy to use before and after.

[0016] 4. The setting of the upper support frame in the utility model can establish a connecting support structure between the inner support frame and the arc-shaped steel sheet, making the structural setting of the arc-shaped steel sheet safer and more stable, not easy to sink or fall, and more safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of an embodiment of the utility model;

[0018] Figure 2 This is a front view schematic diagram of a curved steel sheet according to an embodiment of the present utility model;

[0019] Figure 3 This is a rendering of the curved steel sheet according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of an inner support frame according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of an upper support frame according to an embodiment of the present utility model.

[0022] In the figure: 1. Arc-shaped steel sheet; 10. Inner arc-shaped steel block; 11. Through hole; 12. Partition; 13. Extrusion block; 2. Inner support frame; 20. Side fixing plate; 21. Oblique support plate; 22. Horizontal support plate; 23. Upper connecting plate; 24. Middle connecting plate; 25. First bottom plate; 26. Side support frame; 27. Second bottom plate; 28. Roller; 3. Upper support frame; 30. Upper arch plate. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Specific details such as specific system structures and technologies are proposed in order to more thoroughly understand the embodiments of the present invention. The described embodiments are part of the embodiments of the present disclosure, not all of them. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present disclosure.

[0024] The specific implementation of the present utility model will be described in detail below with reference to the accompanying drawings.

[0025] Figure 1 This is a front view schematic diagram of an embodiment of the utility model, Figure 2 This is a front view of the arc-shaped steel sheet according to the embodiment of the utility model. Figure 3 This is the effect diagram of the curved steel sheet of the embodiment of the utility model,Figure 4 Schematic diagram of the inner support frame of the embodiment of the utility model and Figure 5 This is a schematic diagram of an upper support frame according to an embodiment of the present utility model.

[0026] Reference Figures 1 to 5 As shown, the utility model provides a surrounding rock support device for a deep-buried highway tunnel in a complex goaf section, comprising an arc-shaped steel sheet 1 and an inner support frame 2, wherein a plurality of groups of inner arc-shaped steel blocks 10 are fixed to the inner side surface of the arc-shaped steel sheet 1, and a partition 12 is fixed between two adjacent groups of inner arc-shaped steel blocks 10, and an extrusion block 13 is fixed to the inner side surface of the inner arc-shaped steel block 10 arranged on the left and right parts of the inner side surface of the arc-shaped steel sheet 1, and an inner support frame 2 is installed between the two groups of extrusion blocks 13 on the left and right sides, an upper support frame 3 is fixed to the upper end of the inner support frame 2, and the upper support frame 3 is supported under the two groups of through holes 11 on the upper side.

[0027] In this embodiment, a through hole 11 is formed on the inner arc-shaped steel block 10 , the partition plate 12 is made of cast steel, and the extrusion block 13 is made of rubber.

[0028] As a preferred embodiment, the arc-shaped steel sheet 1 of the utility model is set to be completely in contact with the inner wall of the tunnel rock, with a large supporting contact area, and the inner arc-shaped steel block 10 and the partition 12 are used to strengthen the arc's anti-deformation strength, and the inner arc-shaped steel block 10 and the partition 12 are assembled together more conveniently and quickly.

[0029] In this embodiment, a side support frame 26 is fixed to the lower portion of the outer side surface of the inner support frame 2 , a second bottom plate 27 is fixed to the lower end of the side support frame 26 , and two sets of rollers 28 are installed on the lower end surface of the second bottom plate 27 .

[0030] As a preferred embodiment, the setting of the middle side support frame 26 of the utility model facilitates the stable support of the inner arc steel block 10 and the partition 12 at the inner lower part of the arc steel sheet 1, thereby enhancing the supporting and protective strength of the lower part of the arc steel sheet 1.

[0031] In this embodiment, side fixing plates 20 and oblique support plates 21 are fixed on both sides of the lower end surface of the inner support frame 2, and a cross support plate 22 is fixed between the upper parts of the left and right groups of oblique support plates 21; the side fixing plates 20 are fixed to the outer sides of the oblique support plates 21, and an upper connecting plate 23 and a middle connecting plate 24 are fixed between the side fixing plates 20 and the oblique support plates 21; the lower ends of the side fixing plates 20 and the oblique support plates 21 are fixed on the first base plate 25, and two groups of rollers 28 are installed on the lower end surface of the first base plate 25.

[0032] As a preferred embodiment, the inner support frame 2 of the present invention is provided to strengthen the support and protection strength of the middle and upper parts of the arc-shaped steel sheet 1, and the inner support frame 2 is movable through the side support frame 26 at the bottom, making it convenient to move in and out.

[0033] In this embodiment, an upper arch plate 30 is provided on the lower side of the upper support frame 3 , and the upper arch plate 30 adopts a circular arc-shaped arch plate structure made of cast steel.

[0034] As a preferred embodiment, the setting of the upper support frame 3 in the utility model can establish a connecting support structure between the inner support frame 2 and the arc-shaped steel sheet 1, making the structural setting of the arc-shaped steel sheet 1 safer and more stable, not easy to sink and fall, and safer and more reliable.

[0035] The utility model can effectively solve the problems that the existing support device does not provide stable support for the lower part of the left and right support plates, and the support protection structure under the tunnel is not easy to enter and exit the support, the assembly and transportation intensity is high, and it is not stable, convenient and practical. The utility model has a tighter and firmer contact with the tunnel rock wall support surface, the internal and external supports are stronger and more stable, and the internal support frame and the side support frame can be moved in and out at the same time, and the assembly is safer, more convenient and reliable.

[0036] The above embodiments are used to illustrate the present invention rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit of the present invention and the scope of the claims for protection shall be included in the scope of protection of the present invention.

Claims

1. The surrounding rock support device for deep-buried highway tunnels in complex goaf sections is characterized by: The invention comprises an arc-shaped steel sheet (1) and an inner support frame (2), wherein a plurality of groups of inner arc-shaped steel blocks (10) are fixed on the inner side surface of the arc-shaped steel sheet (1), and a partition plate (12) is fixed between two adjacent groups of inner arc-shaped steel blocks (10), and an extrusion block (13) is fixed on the inner side surface of the inner arc-shaped steel block (10) arranged on the left and right parts of the inner side surface of the arc-shaped steel sheet (1), and an inner support frame (2) is installed between the two groups of extrusion blocks (13) on the left and right sides, and an upper support frame (3) is fixed on the upper end of the inner support frame (2), and the upper support frame (3) is supported below the two groups of through holes (11) on the upper side.

2. The surrounding rock support device for deep-buried highway tunnels in complex goaf sections according to claim 1 is characterized in that: The inner arc-shaped steel block (10) is provided with a through hole (11), the partition (12) is made of cast steel, and the extrusion block (13) is made of rubber.

3. The surrounding rock support device for deep-buried highway tunnels in complex goaf sections according to claim 1 is characterized in that: A side support frame (26) is fixed to the lower portion of the outer side surface of the inner support frame (2), a second bottom plate (27) is fixed to the lower end of the side support frame (26), and two sets of rollers (28) are installed on the lower end surface of the second bottom plate (27).

4. The surrounding rock support device for deep-buried highway tunnels in complex goaf sections according to claim 1 is characterized in that: Side fixing plates (20) and oblique support plates (21) are fixed on both left and right sides of the lower end surface of the inner support frame (2), and a transverse support plate (22) is fixed between the upper parts of the left and right groups of oblique support plates (21).

5. The surrounding rock support device for deep-buried highway tunnels in complex goaf sections according to claim 4 is characterized in that: A side fixing plate (20) is fixed on the outer side of the oblique support plate (21), and an upper connecting plate (23) and a middle connecting plate (24) are fixed between the side fixing plate (20) and the oblique support plate (21).

6. The surrounding rock support device for deep-buried highway tunnels in complex goaf sections according to claim 5 is characterized in that: The lower ends of the side fixing plate (20) and the oblique supporting plate (21) are fixed on the first bottom plate (25), and two groups of rollers (28) are installed on the lower end surface of the first bottom plate (25).

7. The surrounding rock support device for deep-buried highway tunnels in complex goaf sections according to claim 1 is characterized in that: An upper arch plate (30) is provided on the lower side of the upper support frame (3), and the upper arch plate (30) adopts a circular arc-shaped arch plate structure made of cast steel.

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