Grid arch frame for tunnel supporting

Abstract

The utility model relates to a grid arch frame for tunnel supporting, which belongs to the field of tunnel supporting and comprises two upright posts, a top arc-shaped beam, three transverse supporting strips, a motor box and two bases, the two bases are respectively arranged on the left side and the right side of the motor box, and an adjusting structure for adjusting the supporting height is arranged on the inner side of the motor box. The supporting structure comprises a double-output-shaft motor fixedly connected to the inner bottom wall of the motor box, transmission rods fixedly connected to a left output shaft and a right output shaft of the double-output-shaft motor correspondingly, transmission gears fixedly connected to the other ends of the transmission rods, and driven gears meshed with the bottoms of the transmission gears. The threaded rod is fixedly connected to the inner side of the circle center of the driven gear; and the threaded lifting cylinder is in threaded connection to the outer side of the threaded rod. According to the grid lagging jack for tunnel supporting, by introducing a motor driving and threaded lifting structure, accurate adjustment and quick response of the supporting height are achieved, and the height adjustment accuracy of a supporting structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a grid arch for tunnel support belongs to tunnel support field. BACKGROUND

[0002] In tunnel engineering, the stability and reliability of the supporting structure are crucial to ensure construction safety and long-term stability of the tunnel structure. Traditional tunnel support methods mostly use steel frames, anchor rods and other structures, but these support methods often have problems such as unsatisfactory support effect, high construction difficulty and high cost when facing complex geological conditions and construction requirements.

[0003] To solve the above problems, the grid arch as a new type of tunnel support structure has been widely used. The grid arch is usually composed of columns, top arc beams and transverse support bars, forming a stable support frame that can effectively support the pressure on the top of the tunnel and disperse it into the surrounding rock on both sides of the tunnel. However, the traditional grid arch has certain limitations in height adjustment and support flexibility, making it difficult to adjust the support height according to actual needs, thereby affecting the support effect. SUMMARY

[0004] To overcome the shortcomings of the prior art, the utility model provides a grid arch for tunnel support, which has the advantages of improving flexibility, strengthening support effect, etc.

[0005] In summary, the utility model provides the following technical scheme: a grid arch for tunnel support, including two columns, a top arc beam, three transverse support bars, a motor box and two bases, the two bases are arranged on the left and right sides of the motor box, the inner side of the motor box is provided with an adjusting structure for adjusting the support height;

[0006] The adjusting structure includes a double-output shaft motor fixedly connected to the inner bottom wall of the motor box, a transmission rod fixedly connected to the left and right output shafts of the double-output shaft motor, a transmission gear fixedly connected to the other end of the transmission rod, a driven gear meshed with the bottom of the transmission gear, a threaded rod fixedly connected to the inner side of the center of the driven gear, and a threaded lifting cylinder screwedly connected to the outer side of the threaded rod.

[0007] Further, the bottom end of the threaded rod is rotatably connected to the inner bottom wall of the same side base, and the top end of the threaded rod extends through the inner top wall of the same side base and is screwedly connected to the same side threaded lifting cylinder.

[0008] The beneficial effect of the further scheme is that the threaded rod is connected with the threaded lifting cylinder through threads, so that the height is accurately adjusted under the driving of the motor; when the double-output shaft motor works, the transmission gears and driven gears mesh to drive the threaded rod to rotate, and then drive the threaded lifting cylinder to move up and down along the threaded rod, so as to adjust the supporting height.

[0009] Further, the outer part of the threaded lifting cylinder on the left and right sides is slidably connected with a reinforcing frame, and the bottom of the reinforcing frame is provided with an expansion bolt reserved hole.

[0010] The beneficial effect of the further scheme is that the reinforcing frame increases the stability of the entire grid arch, prevents structural deformation caused by height adjustment or external force, and the expansion bolt reserved hole design enables the reinforcing frame to be firmly fixed on the ground, further enhancing the stability of the entire supporting structure.

[0011] Further, the left and right sides of the threaded lifting cylinder are fixedly connected with guide blocks, and the inner side of the guide block is slidably connected with a guide rod, the top end of the guide rod is fixedly connected with the inner top wall of the corresponding reinforcing frame, and the bottom end of the guide rod is fixedly connected with the upper surface of the corresponding base.

[0012] The beneficial effect of the further scheme is that the combination of the guide block and the guide rod provides stable guidance for the up and down movement of the threaded lifting cylinder, preventing it from deviating or shaking during the lifting process, which not only improves the adjustment accuracy, but also prolongs the service life of the equipment.

[0013] Further, the top arc-shaped beam is fixedly connected between the top ends of the two columns, and the three transverse support bars are fixedly connected between the opposite side walls of the two columns, and the three transverse support bars are arranged equidistantly along the up and down direction of the column.

[0014] The beneficial effect of the further scheme is that the combination of the top arc-shaped beam and the transverse support bar forms a stable supporting frame, which can effectively support the pressure of the top of the tunnel, and the equidistant arrangement of the transverse support bars not only improves the overall strength of the supporting structure, but also makes the support more uniform and stable.

[0015] Further, the top arc-shaped beam is fixedly connected with a reinforcing rod at the center of the bottom, and the bottom end of the reinforcing rod penetrates the upper transverse support bar, the middle transverse support bar and the lower transverse support bar in sequence and is fixedly connected with the upper surface of the lower transverse support bar.

[0016] The beneficial effect of the further scheme is that the reinforcing rod further enhances the overall strength of the supporting structure, especially the supporting effect of the top arc-shaped beam is more significant, and by penetrating through multiple transverse support bars and being fixedly connected with the lower transverse support bar, a more stable supporting system is formed.

[0017] Further, the bottom of the lateral support bar is connected with two telescopic support rods, and the bottom ends of the two telescopic support rods are fixedly connected with a fixed plate, and the fixed plate is fixedly connected between the opposite side walls of the left and right two bases.

[0018] The beneficial effect of the further scheme is that the telescopic support rods increase the flexibility of the support structure, and the support height can be adjusted according to actual needs, and the connection of the fixed plate and the base further enhances the stability of the support structure, so that the entire grid arch is more firm and reliable.

[0019] Further, the four corners of the bottom of the fixed plate are fixedly connected with fixed rods, and the bottom ends of the four fixed rods are each provided with a supporting leg.

[0020] The beneficial effect of the further scheme is that the combination of the fixed rods and the supporting legs further provides a stable support foundation for the entire grid arch.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] By introducing the motor drive and the threaded lifting structure, the utility model realizes accurate adjustment and rapid response of the support height, which not only improves the height adjustment accuracy of the support structure, but also quickly adjusts the support height according to the changes of the tunnel geological conditions and construction requirements, and ensures the stability and safety of the support structure. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the utility model;

[0024] Figure 2 is a perspective view of the base, the reinforcing frame and the guide rod in the structure of the utility model;

[0025] Figure 3 is a front schematic view of the utility model.

[0026] MARKED FOR EXPLANATION:

[0027] 1, stand; 2, top arc-shaped beam; 3, lateral support bar; 4, motor box; 5, base; 6, double-output shaft motor; 7, transmission rod; 8, transmission gear; 9, driven gear; 10, threaded rod; 11, threaded lifting cylinder; 12, reinforcing frame; 13, guide block; 14, guide rod; 15, reinforcing rod; 16, telescopic support rod; 17, fixed plate; 18, fixed rod. DETAILED DESCRIPTION

[0028] Please refer to Figures 1-3The utility model provides a kind of grid arch for tunnel support, including two columns 1, top arc beam 2, three lateral support bars 3, motor box 4 and two bases 5, two bases 5 are respectively arranged in the left and right of motor box 4, and the inside of motor box 4 is equipped with adjusting structure for adjusting support height.

[0029] As Figure 1 Shown, adjusting structure includes double-output-shaft motor 6 fixedly connected to the inner bottom wall of motor box 4, transmission rod 7 fixedly connected to the left side output shaft and right side output shaft of double-output-shaft motor 6 respectively, transmission gear 8 fixedly connected to the other end of transmission rod 7, driven gear 9 engaged with the bottom of transmission gear 8, threaded rod 10 fixedly connected to the inner side of the center of driven gear 9 and threaded lifting cylinder 11 screw-connected to the outer side of threaded rod 10.

[0030] It needs to be explained that the bottom end of threaded rod 10 is rotatably connected to the inner bottom wall of the same side base 5, and the top end of threaded rod 10 penetrates the inner top wall of the same side base 5 and extends to the inside of the same side threaded lifting cylinder 11 and is screw-connected with the same side threaded lifting cylinder 11, and through the screw connection of threaded rod 10 and threaded lifting cylinder 11, the height accurate adjustment under motor driving is realized, when double-output-shaft motor 6 works, the meshing transmission of transmission gear 8 and driven gear 9 drives threaded rod 10 to rotate, and in turn drives threaded lifting cylinder 11 to move up and down along threaded rod 10, to achieve the purpose of adjusting support height.

[0031] The outside of left and right threaded lifting cylinders 11 is slidably connected with reinforcing frame 12, and expansion bolt reserved hole is formed in the bottom of reinforcing frame 12, the setting of reinforcing frame 12 increases the stability of the whole grid arch, prevents structural deformation caused by height adjustment or external force, and the design of expansion bolt reserved hole makes reinforcing frame 12 can be firmly fixed on the ground, further enhances the stability of the whole support structure.

[0032] Threaded lifting cylinder 11 is fixedly connected with guide block 13 on the left and right sides, and guide rod 14 is slidably connected to the inner side of guide block 13, the top end of guide rod 14 is fixedly connected with the inner top wall of corresponding reinforcing frame 12, and the bottom end of guide rod 14 is fixedly connected with the upper surface of corresponding base 5, the combination of guide block 13 and guide rod 14 provides stable guide for the up and down movement of threaded lifting cylinder 11, prevents it from deviating or shaking in lifting process, this design not only improves the adjustment accuracy, but also prolongs the service life of equipment.

[0033] The top arc-shaped beam 2 is fixedly connected between the top ends of the two stand columns 1, and three lateral support bars 3 are fixedly connected between the opposite side walls of the two stand columns 1 and are arranged equidistantly along the up-down direction of the stand columns 1 in sequence, the combination of the top arc-shaped beam 2 and the lateral support bars 3 forms a stable support frame, which can effectively support the pressure of the top of the tunnel, and the equidistant arrangement of the lateral support bars 3 not only improves the overall strength of the support structure, but also makes the support more uniform and stable.

[0034] A reinforcing rod 15 is fixedly connected to the center of the bottom of the top arc-shaped beam 2, and the bottom end of the reinforcing rod 15 penetrates the upper lateral support bar 3, the middle lateral support bar 3 and the lower lateral support bar 3 in sequence and is fixedly connected to the upper surface of the lower lateral support bar 3, the arrangement of the reinforcing rod 15 further enhances the overall strength of the support structure, especially the support of the top arc-shaped beam 2, and by penetrating the multiple lateral support bars 3 and being fixedly connected to the lower lateral support bar 3, a more stable support system is formed.

[0035] Two telescopic support rods 16 are fixedly connected to the bottom of the lower lateral support bar 3, and a fixed plate 17 is fixedly connected between the opposite side walls of the left and right two bases 5, the arrangement of the telescopic support rods 16 increases the flexibility of the support structure, and the height of the support can be adjusted according to actual needs, and the connection of the fixed plate 17 and the base 5 further enhances the stability of the support structure, so that the entire grid arch is more firm and reliable.

[0036] Four fixed rods 18 are fixedly connected to the four corners of the bottom of the fixed plate 17, and a supporting leg is installed at the bottom end of each of the four fixed rods 18, and the combination of the fixed rods 18 and the supporting legs further provides a stable support foundation for the entire grid arch.

[0037] In addition, the two stand columns 1 are fixedly connected to the top of the left threaded lifting cylinder 11 and the top of the right threaded lifting cylinder 11 respectively, and the transmission gear 8 and the driven gear 9 are conical gears.

[0038] After the grid arch is installed, appropriate prestress can be applied to further improve its carrying capacity and resistance to deformation.

[0039] The working principle of the above embodiment is as follows:

[0040] When the support height needs to be adjusted, the double-output shaft motor 6 is started, and the output shafts on its left and right sides rotate synchronously, driving the transmission rod 7 and the transmission gear 8 to rotate. Due to the conical design of the transmission gear 8 and the driven gear 9, stable meshing in the vertical direction is ensured, which in turn drives the threaded rod 10 to rotate. The rotation of the threaded rod 10 causes the threaded lifting cylinder 11 connected thereto to move up and down along the axial direction of the threaded rod 10. Since the top of the threaded lifting cylinder 11 is fixedly connected with two upright columns 1, the upright columns 1 and the top arc-shaped beams 2 and the transverse support bars 3 connected thereto will also be raised and lowered, thereby achieving height adjustment of the entire grid arch support.

[0041] Moreover, the threaded lifting cylinder 11 is externally slidably connected with reinforcing frames 12, which further enhance the stability of the grid arch support and prevent structural deformation due to height adjustment or external forces. In addition, the expansion bolt predrilled holes at the bottom of the reinforcing frames 12 allow them to be firmly fixed to the ground, thereby enhancing the stability of the entire support structure. Furthermore, the combination of guide blocks 13 and guide rods 14 provides stable guidance for the up-and-down movement of the threaded lifting cylinder 11, effectively preventing the threaded lifting cylinder 11 from deviating or shaking during the lifting process.

[0042] In terms of support, the top arc-shaped beams 2 are fixedly connected between the top ends of the two upright columns 1, forming the top structure of the support frame. The arc-shaped design can more effectively disperse the pressure at the top of the tunnel, improving the support effect. Three transverse support bars 3 are arranged equidistantly between the opposite side walls of the two upright columns 1, together with the top arc-shaped beams 2, forming a stable support frame. These transverse support bars 3 not only enhance the overall strength of the support structure, but also ensure the uniformity and stability of the support. Moreover, a reinforcing rod 15 is provided at the center of the bottom of the top arc-shaped beams 2, which successively penetrates the upper, middle and lower transverse support bars 3 and is fixedly connected with the upper surface of the lower transverse support bar 3, thereby enhancing the overall strength of the support structure, especially the support effect on the top arc-shaped beams 2.

Claims

1. A lattice arch for tunnel support, comprising two upright columns (1), a top arc-shaped beam (2), three transverse support bars (3), a motor box (4) and two bases (5), characterized in that: Two bases (5) are arranged at left and right sides of the motor box (4), and the inner side of the motor box (4) is provided with an adjusting structure for adjusting the supporting height; The adjusting structure comprises a double-output-shaft motor (6) fixedly connected to the inner bottom wall of the motor box (4), a transmission rod (7) fixedly connected to the left and right output shafts of the double-output-shaft motor (6), a transmission gear (8) fixedly connected to the other end of the transmission rod (7), a driven gear (9) engaged with the bottom of the transmission gear (8), a threaded rod (10) fixedly connected to the inner side of the center of the driven gear (9), and a threaded lifting cylinder (11) threadedly connected to the outer side of the threaded rod (10).

2. A grillage arch for tunnel support according to claim 1, characterised in that: The bottom end of the threaded rod (10) is rotatably connected to the inner bottom wall of the same side base (5), and the top end of the threaded rod (10) penetrates through the inner top wall of the same side base (5) and extends into the same side threaded lifting cylinder (11) and is threadedly connected with the same side threaded lifting cylinder (11).

3. A grillage arch for tunnel support according to claim 1, characterised in that: The outer sides of the threaded lifting cylinders (11) on the left and right sides are both slidably connected with reinforcing frames (12), and the bottom of the reinforcing frame (12) is provided with an expansion bolt reserved hole.

4. A grillage arch for tunnel support according to claim 3, characterised in that: The left and right sides of the threaded lifting cylinder (11) are both fixedly connected with guide blocks (13), and the inner side of the guide block (13) is slidably connected with a guide rod (14), the top end of the guide rod (14) is fixedly connected with the inner top wall of the corresponding reinforcing frame (12), and the bottom end of the guide rod (14) is fixedly connected with the upper surface of the corresponding base (5).

5. A grillage arch for tunnel support according to claim 1, characterised in that: The top arc-shaped beam (2) is fixedly connected between the top ends of the two columns (1), the three transverse support bars (3) are fixedly connected between the opposite side walls of the two columns (1), and the three transverse support bars (3) are arranged equidistantly along the up-down direction of the column (1) in sequence.

6. A grillage arch for tunnel support according to claim 1, characterised in that: The top arc-shaped beam (2) is fixedly connected with a reinforcing rod (15) at the center of the bottom, and the bottom end of the reinforcing rod (15) penetrates through the upper transverse support bar (3) and the middle transverse support bar (3) in sequence and is fixedly connected with the upper surface of the lower transverse support bar (3).

7. A grillage arch for tunnel support according to claim 1, characterised in that: The bottom of the lower transverse support bar (3) is connected with two telescopic support rods (16), and the bottom ends of the two telescopic support rods (16) are fixedly connected with a fixed plate (17), and the fixed plate (17) is fixedly connected between the opposite side walls of the left and right bases (5).

8. A grillage arch for tunnel support according to claim 7, characterised in that: The bottom of the fixed plate (17) is fixedly connected with four fixed rods (18), and the bottom ends of the four fixed rods (18) are both mounted with supporting legs.

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