Multi-arch tunnel construction structure and method without pilot tunnel

Abstract

The application relates to the technical field of tunnel construction, and particularly discloses a construction structure and method for a multi-arch tunnel without a pilot tunnel, which comprises a leading tunnel and a trailing tunnel, a plurality of supporting plates are arranged on the inner sides of the leading tunnel and the trailing tunnel, a supporting and stabilizing mechanism for supporting the supporting plates is arranged between the inner side of the leading tunnel and the supporting plates, an obliquely-inserted reinforcing device, and a vertically-inserted connecting piece. In the application, the supporting seat is moved to the side of the supporting plate close to the blasting position in the construction process of the leading tunnel and the trailing tunnel, then the reinforcing plate is rotated and attached to the supporting plate, the supporting plate is supported by the reinforcing plate, the contact area of the reinforcing plate and the supporting seat is increased by the rectangular supporting rod and the arc-shaped sliding block, so that the stability of the reinforcing plate as a whole is improved, the stability of the supporting plate close to the blasting position is improved by cooperation of the above-mentioned multiple parts, and the supporting plate is prevented from loosening or falling off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel construction, in particular to a multi-arch tunnel construction structure and method without pilot hole. BACKGROUND

[0002] Multi-arch tunnels have been widely used in China, especially in Yunnan Province. Due to their advantages such as linear optimization and small land occupation, the number of multi-arch tunnels has increased significantly. However, multi-arch tunnels have a unique structure: the distance between the leading hole and the trailing hole is small and the two holes are integrated, which requires blasting excavation.

[0003] Chinese patent CN217206467U discloses a damping structure suitable for multi-arch tunnel blasting construction without pilot hole. A gap is provided between the primary support layer and the secondary lining near the middle partition wall of the leading hole, and first and second steel mesh are laid on both sides of the gap. After injecting foam concrete, a damping layer is formed. The damping layer has high bonding degree with the primary support layer and the secondary lining, forming an integrated whole that can effectively resist the shock wave during blasting. The foam concrete has high damping and good absorption and dispersion effect on impact load, preventing cracks in the side walls and arch shoulders of the leading hole. The first and second steel mesh enhance the overall strength of the damping layer, resist the shear force on the primary support layer and secondary lining, and reduce the impact of the blasting shock wave on the concrete lining structure of the leading hole, providing safety and quality assurance for multi-arch tunnel construction without pilot hole.

[0004] In the prior art, support plates are used to reinforce the interior of the leading hole and the trailing hole during construction. However, the leading hole and the trailing hole need to be blasted during construction, which causes the soil at the blasting site to become loose, leading to local shedding of the support plates and affecting the overall support structure inside the leading hole and the trailing hole. The above-mentioned patent only reduces the impact of blasting through a simple damping layer, and cannot reinforce the support plates near the blasting site, which may cause the support plates to become loose or fall down. Therefore, we propose a multi-arch tunnel construction structure and method to solve the above problems. SUMMARY

[0005] The present application aims to provide a multi-arch tunnel construction structure and method to solve the problem of soil loosening at the blasting site of the leading hole and the trailing hole and the loosening or falling of the support plates.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The application discloses a construction structure for a multi-arch tunnel without a pilot tunnel, which comprises a leading tunnel and a following tunnel, and a plurality of supporting plates are arranged on the inner sides of the leading tunnel and the following tunnel; a supporting and stabilizing mechanism is arranged between the inner side of the leading tunnel and the supporting plates and used for supporting the supporting plates; a supporting seat is arranged below the inner side of the leading tunnel and located below the supporting plates; inclined insertion reinforcing devices are arranged on the two sides of the supporting seat and used for reinforcing the leading tunnel; a third fixing seat is fixedly connected to the inner side of the supporting seat; and a vertical insertion connecting piece is arranged on the inner side of the third fixing seat and used for fixing the supporting seat to the ground.

[0008] The supporting and stabilizing mechanism comprises a first fixing seat fixedly connected to the top end of the supporting seat, a rotating seat arranged on the inner side of the first fixing seat, a reinforcing plate fixedly connected to one end of the rotating seat and abutting against the outer wall of the supporting plate, first rotating shafts fixedly connected to the outer walls of the two sides of the rotating seat and having one end penetrating through the outer part of the first fixing seat and being rotationally connected to the first fixing seat, and an insertion connector arranged on the outer wall of the first rotating shaft and the first fixing seat and used for limiting the first rotating shaft.

[0009] In a further embodiment, the vertical insertion connecting piece comprises a one-way threaded screw rod rotationally connected to the inner side of the third fixing seat, a first straight gear fixedly connected to the top end of the one-way threaded screw rod, an L-shaped driving block sleeved on the outer wall of the one-way threaded screw rod, a fixed cone fixedly connected to the bottom end of the L-shaped driving block, L-shaped seats fixedly connected to the outer walls of the two sides of the first fixing seat, a driving motor arranged on the inner side of one of the L-shaped seats, a two-way threaded screw rod connected to the output end of the driving motor, a rectangular sliding block slidingly connected to the inner side of the L-shaped seat and sleeved on the outer wall of the two-way threaded screw rod, a first rack fixedly connected to one end of the rectangular sliding block and engaged with the first straight gear, and an inclined auxiliary assembly arranged between the fixed cone and the supporting seat.

[0010] In a further embodiment, two rectangular sliding blocks are arranged, the outer wall of the two-way threaded screw rod is provided with a right thread and a reverse thread, the two rectangular sliding blocks are sleeved on the outer walls of the right thread and the reverse thread of the two-way threaded screw rod respectively, and the inner side of the L-shaped seat is provided with a limiting sliding groove matched with the rectangular sliding block.

[0011] In a further embodiment, the inner side of the third fixing seat is fixedly connected with two blocking plates, the two blocking plates are respectively attached to the outer walls of the two sides of the L-shaped driving block, and the inner side of the L-shaped driving block is provided with a threaded groove matched with the one-way threaded screw rod.

[0012] In a further embodiment, the supporting and stabilizing mechanism further comprises a second fixing seat fixedly connected to the outer walls of the two sides of the supporting seat, a connecting frame fixedly connected to one end of the second fixing seat, an arc-shaped sliding block slidingly connected to the inner side of the connecting frame, a rectangular supporting rod fixedly connected to one end of the arc-shaped sliding block, and the rectangular supporting rod is fixedly connected to the reinforcing plate.

[0013] In further embodiments, the plug connector comprises a fixed ring fixedly connected to the outer wall of the first rotating shaft, the inner side of the fixed ring is provided with a plurality of second fixed holes with equal distances, the outer wall of the first fixed seat is provided with two first fixed holes recessed inward, the first fixed hole is aligned with the second fixed hole, and the outer wall of one side of the rectangular sliding block is fixedly connected with a fixed rod matched with the second fixed hole and the first fixed hole.

[0014] In further embodiments, the oblique insertion reinforcing device comprises rotating rods rotatably connected to the outer walls of the two sides of the support base, one end of the rotating rod is fixedly connected with a rectangular rotating sleeve, the inner side of the rectangular rotating sleeve is slidably connected with an oblique insertion rod, the outer wall of one side of the oblique insertion rod is fixedly connected with a fixed plate, the outer wall of one side of the fixed plate is fixedly connected with a return spring, one end of the return spring is fixedly connected with the rectangular rotating sleeve, one end of the oblique insertion rod is rotatably connected with a guide wheel, the outer wall of the fixed cone is fixedly connected with a T-shaped block, and the inner side of the oblique insertion rod is provided with an auxiliary reinforcing assembly penetrating through the outer wall of the oblique insertion rod.

[0015] In further embodiments, the oblique insertion reinforcing device comprises rotating rods rotatably connected to the outer walls of the two sides of the support base, one end of the rotating rod is fixedly connected with a rectangular rotating sleeve, the inner side of the rectangular rotating sleeve is slidably connected with an oblique insertion rod, the outer wall of one side of the oblique insertion rod is fixedly connected with a fixed plate, the outer wall of one side of the fixed plate is fixedly connected with a return spring, one end of the return spring is fixedly connected with the rectangular rotating sleeve, one end of the oblique insertion rod is rotatably connected with a guide wheel, the outer wall of the fixed cone is fixedly connected with a T-shaped block, and the inner side of the oblique insertion rod is provided with an auxiliary reinforcing assembly penetrating through the outer wall of the oblique insertion rod.

[0016] In further embodiments, the auxiliary reinforcing assembly comprises auxiliary seats fixedly connected to the outer walls of the two sides of the support base, one of the auxiliary seats is fixedly connected with a reinforcing seat at both ends, the inner side of the reinforcing seat is provided with a groove, the outer wall of one side of the rectangular rotating sleeve is fixedly connected with a rectangular bolt, the inner side of the oblique insertion rod is provided with a rotating block, the outer wall of one side of the rotating block is fixedly connected with a second rotating shaft, one end of the second rotating shaft penetrates through the outside of the oblique insertion rod and is rotatably connected with the oblique insertion rod, one end of the second rotating shaft is fixedly connected with a connecting column, the outer wall of one side of the connecting column is mounted with a torsion spring, one end of the torsion spring is mounted on the outer wall of the oblique insertion rod, and one end of the rectangular bolt penetrates through the outside of the connecting column.

[0017] The application also discloses a construction method of the multi-arch tunnel without pilot tunnel, which adopts the construction structure of the multi-arch tunnel without pilot tunnel.

[0018] S1, first, the support base is moved to the side of the support plate close to the blasting position in the construction process of the preceding hole and the subsequent hole, then the reinforcing plate is rotated to be attached to the support plate, the support plate is supported by the reinforcing plate, the contact area of the reinforcing plate and the support base is increased by the rectangular support rod and the arc-shaped sliding block, so that the stability of the reinforcing plate as a whole is improved, the stability of the support plate close to the blasting position is improved by cooperation of the above-mentioned multiple parts, and the support plate is prevented from loosening or falling off.

[0019] S2, when the reinforcing plate is against the support plate, the driving motor is started, the output end of the driving motor drives the bidirectional screw rod to rotate, thereby driving the rectangular slider to drive the first rack to move horizontally, further driving the first straight gear to drive the unidirectional screw rod to rotate, driving the L-shaped driving block to drive the fixed cone to move downward, so that the fixed cone is inserted into the soil, thereby fixing the support base, thereby improving the stability of the support base when supporting the support plate;

[0020] S3, the rectangular slider moves horizontally while driving the fixed rod to move, so that the fixed rod is inserted into the first fixed hole through the second fixed hole, thereby fixing the rotating seat and the first fixed seat, thereby improving the stability of the reinforcing plate when supporting;

[0021] S4, when the fixed cone moves downward, the second rack is driven downward through the connecting rod, thereby driving the second straight gear to drive the worm to rotate, further driving the worm wheel to drive the rectangular rotating sleeve to rotate through the rotating rod, when the second rack outer wall clamping teeth and the second straight gear are separated, the guide wheel rotates to the lower side of the T-shaped block, when the fixed cone continues to move downward, the T-shaped block is contacted with the guide wheel through the T-shaped block one end slope, the guide wheel is pushed to drive the inclined insertion rod to be inserted into the soil under the action of the T-shaped block, thereby reinforcing the support base, thereby improving the stability of the support base when supporting;

[0022] S5, when the inclined insertion rod is inserted into the soil, the T-shaped block bottom end slope is separated from the guide wheel, the rectangular pin is removed from the connecting column, at the same time, the rotating block is aligned with the groove, so that the torsional spring is no longer subjected to the force of the outside through the connecting column and the second rotating shaft to drive the rotating block to rotate, thereby making the rotating block engaged into the groove and attached to the inside of the reinforcing seat, thereby increasing the contact area of the support base and the inclined insertion rod, thereby further improving the stability of the inclined insertion rod supporting the support base.

[0023] Compared with the prior art, the beneficial effects of the present application are:

[0024] 1、In the present application, the support stability mechanism is arranged, the support base is moved to the side of the support plate close to the blasting position in the construction process of the first hole and the second hole, then the reinforcing plate is rotated, the reinforcing plate is attached to the support plate, the reinforcing plate supports the support plate, the contact area of the reinforcing plate and the support base is increased through the rectangular support rod and the arc-shaped slider, thereby improving the stability of the reinforcing plate as a whole, the stability of the support plate close to the blasting position is improved through the cooperation of the above multiple parts, thereby avoiding the loosening or falling of the support plate;

[0025] 2、The vertical connecting piece is arranged in the application, when the reinforcing plate abuts against the supporting plate, the driving motor is started, the output end of the driving motor drives the bidirectional screw rod to rotate, thereby driving the rectangular sliding block to drive the first rack to move horizontally, further driving the first straight gear to drive the unidirectional screw rod to rotate, driving the L-shaped driving block to drive the fixed cone to move downwards, so that the fixed cone is inserted into the soil, thereby fixing the support seat, improving the stability of the support seat as a whole, and further improving the stability when supporting the supporting plate;

[0026] 3、The plug-in connector is arranged in the application, the rectangular sliding block moves horizontally while driving the fixed rod to move, so that the fixed rod is inserted into the first fixed hole through the second fixed hole, thereby fixing the rotating seat and the first fixed seat, and further improving the stability when the reinforcing plate supports;

[0027] 4、The inclined insertion reinforcing device is arranged in the application, when the fixed cone moves downwards, the second rack is driven to move downwards through the connecting rod, thereby driving the second straight gear to drive the worm to rotate, further driving the worm wheel to drive the rectangular rotating sleeve to rotate through the rotating rod, when the second rack outer wall clamping teeth are separated from the second straight gear, the guide wheel rotates to the lower side of the T-shaped block, when the fixed cone continues to move downwards, the T-shaped block one end inclined surface contacts with the guide wheel, the guide wheel is pushed to drive the inclined insertion rod to be inserted into the soil under the action of the T-shaped block, thereby reinforcing the support seat, and improving the stability when the support seat supports;

[0028] 5、The auxiliary reinforcing assembly is arranged in the application, when the inclined insertion rod is inserted into the soil, the T-shaped block bottom end inclined surface is separated from the guide wheel, the rectangular pin is removed from the connecting column, at the same time, the rotating block is aligned with the groove, so that the torsional spring is no longer subjected to the force of the outside world to drive the rotating block to rotate through the connecting column and the second rotating shaft, thereby making the rotating block be clamped into the groove and be attached to the inside of the reinforcing seat, thereby increasing the contact area of the support seat and the inclined insertion rod, and further improving the stability of the inclined insertion rod supporting the support seat. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structure schematic view of a multi-arch tunnel construction structure and method without a pilot tunnel;

[0030] Figure 2 It is a support stability mechanism structure schematic view in the application;

[0031] Figure 3 It is a support stability mechanism structure schematic view in the application; Figure 2 It is an enlarged view of A in the application;

[0032] Figure 4 It is an enlarged view of B in the application; Figure 2 It is an enlarged view of B in the application;

[0033] Figure 5It is the schematic diagram of structure after the oblique insertion rod rotates in the application;

[0034] Figure 6 It is the sectional view of the connecting frame in the application;

[0035] Figure 7 It is the schematic diagram of local structure of the vertical insertion connecting piece in the application;

[0036] Figure 8 It is the schematic diagram of structure after the oblique insertion rod is inserted in the application.

[0037] In the figure: 1, the first hole; 2, the second hole; 3, the support plate; 4, the support seat; 5, the reinforcing plate; 6, the rotating seat; 7, the first fixed seat; 8, the rectangular support rod; 9, the connecting frame; 10, the second fixed seat; 11, the auxiliary seat; 12, the reinforcing seat; 13, the oblique insertion rod; 14, the first rotating shaft; 15, the rectangular sliding block; 16, the first fixed hole; 17, the fixed ring; 18, the second fixed hole; 19, the fixed rod; 20, the bidirectional threaded screw rod; 21, the L-shaped seat; 22, the driving motor; 23, the first rack; 24, the unidirectional threaded screw rod; 25, the first straight gear; 26, the third fixed seat; 27, the L-shaped driving block; 28, the fixed cone; 29, the fourth fixed seat; 30, the worm; 31, the rotating rod; 32, the worm wheel; 33, the connecting rod; 34, the guide wheel; 35, the second rack; 36, the second straight gear; 37, the return spring; 38, the fixed plate; 39, the rectangular bolt; 40, the rectangular rotating sleeve; 41, the T-shaped block; 42, the connecting column; 43, the arc-shaped sliding block; 44, the blocking plate; 45, the rotating block; 46, the second rotating shaft; 47, the torsional spring; 48, the groove. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0039] Please refer to Figures 1-8 In the embodiments of the application, a non-pilot tunnel construction structure of a multi-arch tunnel comprises a first hole 1 and a second hole 2, and a plurality of support plates 3 are installed on the inner sides of the first hole 1 and the second hole 2. A support stabilizing mechanism for supporting the support plates 3 is arranged between the inner side of the first hole 1 and the support plates 3. A support seat 4 is arranged below the support plates 3 on the inner side of the first hole 1. Oblique insertion reinforcing devices for reinforcing the first hole 1 are arranged on the two sides of the support seat 4. A third fixed seat 26 is fixedly connected to the inner side of the support seat 4. A vertical insertion connecting piece for fixing the support seat 4 to the ground is arranged on the inner side of the third fixed seat 26.

[0040] The support stabilizing mechanism comprises a first fixed seat 7 fixedly connected to the top end of the support base 4, the inner side of the first fixed seat 7 is provided with a rotating seat 6, one end of the rotating seat 6 is fixedly connected with a reinforcing plate 5, the reinforcing plate 5 abuts against the outer wall of the support plate 3, the outer walls of the two sides of the rotating seat 6 are fixedly connected with first rotating shafts 14, one end of the first rotating shafts 14 penetrates to the outside of the first fixed seat 7 and is rotatably connected with the first fixed seat 7, the outer wall of the first rotating shaft 14 and the first fixed seat 7 is provided with a plug connector for limiting the first rotating shaft 14, the support stabilizing mechanism further comprises a second fixed seat 10 fixedly connected to the outer walls of the two sides of the support base 4, one end of the second fixed seat 10 is fixedly connected with a connecting frame 9, the inner side of the connecting frame 9 is slidably connected with an arc-shaped sliding block 43, one end of the arc-shaped sliding block 43 is fixedly connected with a rectangular support rod 8, one end of the rectangular support rod 8 is fixedly connected with the reinforcing plate 5.

[0041] Firstly, the support base 4 is moved to one side of the support plate 3 which is close to the blasting position in the construction process of the preceding hole 1 and the subsequent hole 2, then the reinforcing plate 5 is rotated to be attached to the support plate 3, the support plate 3 is supported by the reinforcing plate 5, the contact area between the reinforcing plate 5 and the support base 4 is increased by the rectangular support rod 8 and the arc-shaped sliding block 43, so as to improve the stability of the reinforcing plate 5 as a whole, the stability of the support plate 3 which is close to the blasting position is improved by the cooperation of the above-mentioned multiple parts, and then the support plate 3 is prevented from loosening or falling off.

[0042] Please refer to Figures 1-7 The vertical insertion connecting piece comprises a one-way threaded screw rod 24 rotatably connected to the inner side of the third fixed seat 26, the top end of the one-way threaded screw rod 24 is fixedly connected with a first straight gear 25, the outer wall of the one-way threaded screw rod 24 is sleeved with an L-shaped driving block 27, the bottom end of the L-shaped driving block 27 is fixedly connected with a fixed cone 28, the outer walls of the two sides of the first fixed seat 7 are fixedly connected with L-shaped seats 21, the inner side of one of the L-shaped seats 21 is mounted with a driving motor 22, the output end of the driving motor 22 is connected with a bidirectional threaded screw rod 20, the inner side of the L-shaped seat 21 is slidably connected with rectangular sliding blocks 15, the rectangular sliding blocks 15 are sleeved on the outer wall of the bidirectional threaded screw rod 20, one end of the rectangular sliding blocks 15 is fixedly connected with a first rack 23 engaged with the first straight gear 25, the fixed cone 28 and the support base 4 are provided with an inclined auxiliary assembly, the rectangular sliding blocks 15 are provided in two, the outer wall of the bidirectional threaded screw rod 20 is provided with a right thread and a reverse thread, the two rectangular sliding blocks 15 are respectively sleeved on the outer wall of the right thread and the reverse thread of the bidirectional threaded screw rod 20, the inner side of the L-shaped seat 21 is provided with a limiting sliding groove matched with the rectangular sliding blocks 15, the inner side of the third fixed seat 26 is fixedly connected with two blocking plates 44, the two blocking plates 44 respectively abut against the outer walls of the two sides of the L-shaped driving block 27, the inner side of the L-shaped driving block 27 is provided with a threaded groove matched with the one-way threaded screw rod 24.

[0043] When the reinforcing plate 5 is against the support plate 3, the driving motor 22 is started, the output end of the driving motor 22 drives the bidirectional screw rod 20 to rotate, thereby driving the rectangular sliding block 15 to drive the first rack 23 to move horizontally, and further driving the one-way screw rod 24 to rotate through the first spur gear 25, driving the L-shaped driving block 27 to drive the fixed cone 28 to move downward, so that the fixed cone 28 is inserted into the soil, thereby fixing the support base 4, improving the stability of the support base 4 as a whole, and further improving the stability when supporting the support plate 3.

[0044] Please refer to Figure 3 , the plug connector comprises a fixed ring 17 fixedly connected to the outer wall of the first rotating shaft 14, a plurality of second fixed holes 18 with equal distances are formed in the inner side of the fixed ring 17, two first fixed holes 16 are formed in the outer wall of the first fixed seat 7 and are recessed inward, the first fixed holes 16 are aligned with the second fixed holes 18, and the outer wall of one side of the rectangular sliding block 15 is fixedly connected with a fixed rod 19 matched with the second fixed holes 18 and the first fixed holes 16.

[0045] The rectangular sliding block 15 moves horizontally while driving the fixed rod 19 to move, so that the fixed rod 19 is inserted into the first fixed hole 16 through the second fixed hole 18, thereby fixing the rotating seat 6 and the first fixed seat 7, and further improving the stability when the reinforcing plate 5 is supported.

[0046] Please refer to Figures 2-5 , the oblique insertion reinforcing device comprises rotating rods 31 rotatably connected to the outer walls of both sides of the support base 4, a rectangular rotating sleeve 40 fixedly connected to one end of the rotating rod 31, an oblique insertion rod 13 slidably connected to the inner side of the rectangular rotating sleeve 40, a fixed plate 38 fixedly connected to the outer wall of one side of the oblique insertion rod 13, a return spring 37 fixedly connected to the outer wall of one side of the fixed plate 38, one end of the return spring 37 fixedly connected to the rectangular rotating sleeve 40, a guide wheel 34 rotatably connected to one end of the oblique insertion rod 13, a T-shaped block 41 fixedly connected to the outer wall of the fixed cone 28, and an auxiliary reinforcing assembly penetrating through the outer wall of the oblique insertion rod 13 and arranged on the inner side of the oblique insertion rod 13, the auxiliary reinforcing assembly comprising fourth fixed seats 29 fixedly connected to the outer walls of both sides of the support base 4, a worm 30 rotatably connected to the inner side of the fourth fixed seat 29, a second spur gear 36 fixedly connected to one end of the worm 30, a connecting rod 33 fixedly connected to the outer wall of the fixed cone 28, one end of the connecting rod 33 fixedly connected with a second rack 35 engaged with the second spur gear 36, and a worm wheel 32 fixedly connected to the outer wall of the rotating rod 31 and engaged with the worm 30.

[0047] When the fixed cone 28 moves downward, the second rack 35 is driven to move downward through the connecting rod 33, so as to drive the second spur gear 36 to rotate the worm 30, and then drive the worm wheel 32 to rotate the rectangular rotating sleeve 40 through the rotating rod 31. When the outer wall of the second rack 35 is separated from the second spur gear 36, the guide wheel 34 is rotated to be located below the T-shaped block 41. When the fixed cone 28 continues to move downward, the T-shaped block 41 is in contact with the guide wheel 34 through the inclined surface at one end of the T-shaped block 41. The guide wheel 34 is pushed to drive the inclined inserting rod 13 to be obliquely inserted into the soil under the action of the T-shaped block 41. In this way, the support seat 4 is reinforced, so as to improve the stability of the support seat 4 when supporting.

[0048] Please refer to Figure 5 With Figure 8 , the auxiliary reinforcing assembly comprises auxiliary seats 11 fixedly connected to the outer walls of the support seat 4 on both sides, one of the auxiliary seats 11 is fixedly connected with reinforcing seats 12 at both ends, the inner side of the reinforcing seat 12 is provided with a groove 48, the outer wall of one side of the rectangular rotating sleeve 40 is fixedly connected with a rectangular bolt 39, the inner side of the inclined inserting rod 13 is provided with a rotating block 45, the outer wall of one side of the rotating block 45 is fixedly connected with a second rotating shaft 46, one end of the second rotating shaft 46 penetrates to the outside of the inclined inserting rod 13 and is rotatably connected with the inclined inserting rod 13, one end of the second rotating shaft 46 is fixedly connected with a connecting column 42, the outer wall of one side of the connecting column 42 is mounted with a torsional spring 47, one end of the torsional spring 47 is mounted on the outer wall of the inclined inserting rod 13, and one end of the rectangular bolt 39 penetrates to the outside of the connecting column 42.

[0049] When the inclined inserting rod 13 is obliquely inserted into the soil, the rectangular bolt 39 moves out of the connecting column 42, the rotating block 45 is aligned with the groove 48 at the same time, so that the torsional spring 47 is no longer subjected to the force of the outside world to drive the rotating block 45 to rotate through the connecting column 42 and the second rotating shaft 46, so that the rotating block 45 is clamped into the groove 48 and is attached to the inner side of the reinforcing seat 12, thereby increasing the contact area of the support seat 4 and the inclined inserting rod 13, and further improving the stability of the inclined inserting rod 13 supporting the support seat 4.

[0050] The following will combine the above-mentioned continuous-arch tunnel construction structure without pilot tunnel to provide a continuous-arch tunnel construction method without pilot tunnel, which specifically comprises the following steps:

[0051] S1, first, move the support seat 4 to the side of the support plate 3 close to the blasting position in the construction process of the first hole 1 and the second hole 2, then rotate the reinforcing plate 5 to attach the reinforcing plate 5 to the support plate 3, support the support plate 3 through the reinforcing plate 5, increase the contact area of the reinforcing plate 5 and the support seat 4 through the rectangular support rod 8 and the arc-shaped sliding block 43, thereby improving the stability of the reinforcing plate 5 as a whole, and improving the stability of the support plate 3 close to the blasting position through the cooperation of the above-mentioned multiple parts, thereby avoiding the support plate 3 from being loosened or falling off;

[0052] S2, when the reinforcing plate 5 is against the support plate 3, the driving motor 22 is started, the output end of the driving motor 22 drives the bidirectional screw rod 20 to rotate, thereby driving the rectangular sliding block 15 to drive the first rack 23 to move horizontally, further driving the first spur gear 25 to drive the unidirectional screw rod 24 to rotate, driving the L-shaped driving block 27 to drive the fixed cone 28 to move downward, so that the fixed cone 28 is inserted into the soil, thereby fixing the support base 4, thereby improving the stability of the support base 4 when supporting the support plate 3;

[0053] S3, the rectangular sliding block 15 moves horizontally while driving the fixed rod 19 to move, so that the fixed rod 19 is inserted into the first fixed hole 16 through the second fixed hole 18, thereby fixing the rotating seat 6 and the first fixed seat 7, thereby improving the stability when the reinforcing plate 5 supports;

[0054] S4, when the fixed cone 28 moves downward, the second rack 35 is driven to move downward through the connecting rod 33, thereby driving the second spur gear 36 to drive the worm 30 to rotate, further driving the worm wheel 32 to drive the rectangular rotating sleeve 40 to rotate through the rotating rod 31, when the outer wall of the second rack 35 is separated from the second spur gear 36, the guide wheel 34 rotates to the lower side of the T-shaped block 41, when the fixed cone 28 continues to move downward, the T-shaped block 41 is contacted with the guide wheel 34 through the one end of the T-shaped block 41, the guide wheel 34 is pushed to drive the inclined insertion rod 13 to be inserted into the soil under the action of the T-shaped block 41, thereby reinforcing the support base 4, thereby improving the stability of the support base 4 when supporting;

[0055] S5, when the inclined insertion rod 13 is inserted into the soil, the T-shaped block 41 is separated from the guide wheel 34, the rectangular insertion pin 39 is moved out from the inside of the connecting column 42, at the same time, the rotating block 45 is aligned with the groove 48, so that the torsional spring 47 is no longer contacted with the connecting column 42, the second rotating shaft 46 drives the rotating block 45 to rotate, thereby making the rotating block 45 be combined into the groove 48 and be attached to the inside of the reinforcing seat 12, thereby increasing the contact area between the support base 4 and the inclined insertion rod 13, thereby further improving the stability of the inclined insertion rod 13 when supporting the support base 4.

[0056] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and it is intended to embrace all changes and modifications that fall within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0057] Furthermore, it should be understood that although the description is made according to the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and the person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that the person skilled in the art can understand.

Claims

1. A structure for construction of a multiple-arch tunnel without a pilot tunnel, comprising a leading tunnel and a following tunnel, characterized in that, The inner side of the preceding hole and the inner side of the subsequent hole are provided with a plurality of support plates, a support stabilizing mechanism is arranged between the inner side of the preceding hole and the support plates for supporting the support plates, a support seat is arranged below the inner side of the preceding hole and located below the support plates, inclined insertion reinforcing devices are arranged on both sides of the support seat for reinforcing the preceding hole, a third fixing seat is fixedly connected to the inner side of the support seat, and a vertical insertion connecting piece is arranged on the inner side of the third fixing seat for fixing the support seat to the ground; The support stabilizing mechanism comprises a first fixing seat fixedly connected to the top end of the support seat, a rotating seat is arranged on the inner side of the first fixing seat, a reinforcing plate is fixedly connected to one end of the rotating seat and abuts against the outer wall of the support plate, first rotating shafts are fixedly connected to the outer walls on both sides of the rotating seat, one end of each first rotating shaft penetrates through to the outside of the first fixing seat and is rotatably connected to the first fixing seat, and the outer walls of the first rotating shafts and the first fixing seat are provided with plug-in connectors for limiting the first rotating shafts; The vertical insertion connecting piece comprises a one-way threaded screw rod rotatably connected to the inner side of the third fixing seat, a first straight gear is fixedly connected to the top end of the one-way threaded screw rod, an L-shaped driving block is sleeved on the outer wall of the one-way threaded screw rod, a fixed cone is fixedly connected to the bottom end of the L-shaped driving block, L-shaped seats are fixedly connected to the outer walls on both sides of the first fixing seat, a drive motor is arranged on the inner side of one of the L-shaped seats, a two-way threaded screw rod is connected to the output end of the drive motor, a rectangular sliding block is slidably connected to the inner side of the L-shaped seat and is sleeved on the outer wall of the two-way threaded screw rod, one end of the rectangular sliding block is fixedly connected to a first rack engaged with the first straight gear, and an inclined auxiliary assembly is arranged between the fixed cone and the support seat; The inclined insertion reinforcing device comprises a rotating rod rotatably connected to the outer walls on both sides of the support seat, a rectangular rotating sleeve is fixedly connected to one end of the rotating rod, an inclined insertion rod is slidably connected to the inner side of the rectangular rotating sleeve, a fixed plate is fixedly connected to the outer wall on one side of the inclined insertion rod, a reset spring is fixedly connected to the outer wall on one side of the fixed plate, one end of the reset spring is fixedly connected to the rectangular rotating sleeve, a guide wheel is rotatably connected to one end of the inclined insertion rod, a T-shaped block is fixedly connected to the outer wall of the fixed cone, and an auxiliary reinforcing assembly is arranged on the inner side of the inclined insertion rod and penetrates through to the outer wall of the inclined insertion rod; The inclined auxiliary assembly comprises a fourth fixing seat fixedly connected to the outer walls on both sides of the support seat, a worm is rotatably connected to the inner side of the fourth fixing seat, a second straight gear is fixedly connected to one end of the worm, a connecting rod is fixedly connected to the outer wall of the fixed cone, a second rack engaged with the second straight gear is fixedly connected to one end of the connecting rod, and a worm wheel engaged with the worm is fixedly connected to the outer wall of the rotating rod.

2. The multi-arch tunnel construction structure without pilot tunnel according to claim 1, characterized in that, Two rectangular sliders are arranged, the outer wall of the bidirectional screw rod is provided with a right thread and a reverse thread, and the two rectangular sliders are respectively sleeved on the outer wall of the bidirectional screw rod right thread and reverse thread.

3. The multi-arch tunnel construction structure without pilot tunnel according to claim 2, characterized in that, The inner side of the third fixing seat is fixedly connected with two blocking plates, the two blocking plates are respectively attached to the outer walls on both sides of the L-shaped driving block, and the inner side of the L-shaped driving block is provided with a thread groove matched with the single-thread screw rod.

4. The multi-arch tunnel construction structure without pilot tunnel according to claim 3, characterized in that, The support stable mechanism further comprises a second fixing seat fixedly connected to the outer walls on both sides of the support seat, one end of the second fixing seat is fixedly connected with a connecting frame, the inner side of the connecting frame is slidably connected with an arc-shaped sliding block, one end of the arc-shaped sliding block is fixedly connected with a rectangular support rod, and one end of the rectangular support rod is fixedly connected with the reinforcing plate.

5. The multi-arch tunnel construction structure without pilot tunnel according to claim 4, characterized in that, The plug-in connector comprises a fixed ring fixedly connected to the outer wall of the first rotating shaft, a plurality of second fixing holes with equal distances are formed in the inner side of the fixed ring, the outer wall of the first fixing seat is provided with two first fixing holes recessed inward, the first fixing holes are aligned with the second fixing holes, and the outer wall of one side of the rectangular sliding block is fixedly connected with a fixed rod matched with the second fixing holes and the first fixing holes.

6. The multi-arch tunnel construction structure without pilot tunnel according to claim 5, wherein The auxiliary reinforcing assembly comprises auxiliary seats fixedly connected to the outer walls on both sides of the support seat, two ends of one of the auxiliary seats are fixedly connected with reinforcing seats, the inner side of the reinforcing seat is provided with a recess, the outer wall of one side of the rectangular rotating sleeve is fixedly connected with a rectangular bolt, the inner side of the inclined plug rod is provided with a rotating block, the outer wall of one side of the rotating block is fixedly connected with a second rotating shaft, one end of the second rotating shaft penetrates to the outside of the inclined plug rod and is rotatably connected with the inclined plug rod, one end of the second rotating shaft is fixedly connected with a connecting column, the outer wall of one side of the connecting column is mounted with a torsional spring, one end of the torsional spring is mounted on the outer wall of the inclined plug rod, and one end of the rectangular bolt penetrates to the outside of the connecting column.

7. A method for constructing a multi-arch tunnel without a pilot tunnel, characterized in that, The multi-arch tunnel construction structure without pilot tunnel comprises the following steps: S1, first, move the support seat to the side of the support plate close to the blasting position in the construction process of the preceding hole and the subsequent hole, then rotate the reinforcing plate to attach the reinforcing plate to the support plate, support the support plate through the reinforcing plate, increase the contact area of the reinforcing plate and the support seat through the rectangular support rod and the arc-shaped sliding block, thereby improving the stability of the reinforcing plate as a whole, and improve the stability of the support plate close to the blasting position through cooperation of the above-mentioned parts, thereby avoiding loosening or falling of the support plate; S2, when the reinforcing plate is against the support plate, the driving motor is started, the output end of the driving motor drives the bidirectional screw rod to rotate, thereby driving the rectangular slider to drive the first rack to move horizontally, and then driving the first spur gear to drive the unidirectional screw rod to rotate, driving the L-shaped driving block to drive the fixed cone to move downward, so that the fixed cone is inserted into the soil, thereby fixing the support seat, thereby improving the stability of the support seat, and then improving the stability of the support plate support; S3, the rectangular slider moves horizontally while driving the fixed rod to move, so that the fixed rod is inserted into the first fixed hole through the second fixed hole, thereby fixing the rotating seat and the first fixed seat, thereby improving the stability of the reinforcing plate support; S4, when the fixed cone moves downward, the second rack is driven to move downward through the connecting rod, thereby driving the second spur gear to drive the worm to rotate, and then driving the worm wheel to drive the rectangular rotating sleeve to rotate through the rotating rod, when the second rack outer wall clamping tooth is separated from the second spur gear, the guide wheel rotates below the T-shaped block, when the fixed cone continues to move downward, the T-shaped block one end inclined surface contacts with the guide wheel, under the action of the T-shaped block, the guide wheel drives the inclined insertion rod to be inserted into the soil obliquely, thereby reinforcing the support seat, thereby improving the stability of the support seat support; S5, when the inclined insertion rod is inserted into the soil, the T-shaped block bottom end inclined surface is separated from the guide wheel, the rectangular bolt moves out from the inside of the connecting column, at the same time, the rotating block is aligned with the groove, so that the torsional spring is no longer subjected to the force of the outside through the connecting column, the second rotating shaft drives the rotating block to rotate, thereby making the rotating block clamped into the groove and adhered to the inside of the reinforcing seat, thereby increasing the contact area of the support seat and the inclined insertion rod, thereby further improving the stability of the inclined insertion rod supporting the support seat.

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