A tunnel heading excavation and steel arch installation integrated device

Abstract

The utility model relates to the technical field of civil engineering discloses a kind of tunnel pilot pit excavation and steel arch installation integrated device. Including: tunnel body, several holes are opened between the outer wall and inner wall of tunnel body, for enhancing the support strength of overall structure;Water tank, several water tanks are located in the lower of tunnel body inner wall, can be used to drain accumulated water;Supporting device, located in the overall interior of tunnel body. Two groups of movable car are matched with wheels, it is convenient to move in tunnel;Rotary sleeve, utilize its two groups of opposite threads to drive bidirectional threaded rod, realize spacing adjustment between supporting plate, so that supporting device can adapt to the tunnel double-side wall pilot pit of different sizes, satisfy the construction demand of diversification.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology, specifically to an integrated device for tunnel pilot excavation and steel arch frame installation. Background Technology

[0002] In the construction of pilot tunnels with double sidewalls, the performance of the support structure is crucial to construction safety and tunnel stability. Traditional steel support technology uses anchor bolts and shotcrete to fix the steel frame to the surrounding rock. While this can transmit pressure and maintain stability, the welding or bolting process is complex, resulting in low construction efficiency and difficulty in quickly adjusting to different tunnel dimensions. Therefore, there is an urgent need for a steel connection support structure for pilot tunnels with double sidewalls that is easy to construct, highly adaptable, and has good drainage, in order to solve the problems existing in current technologies.

[0003] A search of existing technology (application number: CN117868927B) revealed that this application relates to a tunnel support device. The tunnel support device of this application includes a first limiting plate, a second limiting plate, a first movable plate, a second movable plate, and a top plate. The first and second limiting plates are vertically opposite each other. The top of the first limiting plate has a first slot, and the top of the second limiting plate has a second slot. The first movable plate is movably disposed in the first slot, and the second movable plate is movably disposed in the second slot. The top plate connects the tops of the first and second movable plates. The first limiting plate has a first lifting assembly for adjusting the height position of the first movable plate in the first slot, and the second limiting plate has a second lifting assembly for adjusting the height position of the second movable plate in the second slot. The tunnel support device of this application has the advantages of simple operation, high efficiency, and good applicability.

[0004] However, while existing technologies have improved overall efficiency, they still have some shortcomings, such as the inability to freely move the support position and support distance. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an integrated device for tunnel pilot excavation and steel arch frame installation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an integrated device for tunnel pilot excavation and steel arch frame installation, comprising: a tunnel body, wherein a plurality of holes are opened between the outer wall and the inner wall of the tunnel body to enhance the supporting strength of the overall structure; a water tank, wherein a plurality of water tanks are provided below the inner wall of the tunnel body to drain accumulated water; and a support device located inside the tunnel body.

[0007] As a further description of the above technical solution:

[0008] The support device includes: a movable vehicle located above the bottom of the inner wall of the tunnel body, consisting of two sets, with wheels installed at the four corners of the movable vehicle; cylindrical slots located on the side of the movable vehicle, several of which are evenly distributed, through which connecting rods can be inserted; fixed pins located on both sides above the movable vehicle, with slots at the top, through which bidirectional threaded rods pass through the slots and through the two sets of fixed pins, with both ends connected to the support plate; and a sleeve with two sets of opposite threads, which is rotatably connected to the fixed pins, with the two sets of bidirectional threaded rods being two sets of opposite threads and threadedly connected to both ends of the sleeve.

[0009] As a further description of the above technical solution:

[0010] The support device further includes a support plate, which is respectively installed at one end of two sets of bidirectional threaded rods to support the inner wall of the tunnel body, and the bottom of the support plate is fixed to one end of the connecting rod.

[0011] As a further description of the above technical solution:

[0012] The support plate is also equipped with a connecting device, which is used to connect the two sets of support plates.

[0013] As a further description of the above technical solution:

[0014] The connecting device includes: a cylindrical pin one, which is vertically fixed to one side of the inner wall of a set of support plates; two connecting columns, one end of which is fixed to the cylindrical pin one, and the other end has a hole with an iron ring fitted in the hole; and a cylindrical pin two, which is located on one side of the inner wall of another set of support plates, and the other end is connected to the second set of connecting columns.

[0015] As a further description of the above technical solution:

[0016] The connecting device further includes: a snap ring, located in a slot at one end of the second set of connecting columns, which is a notched ring, with a pressable pin at one end.

[0017] As a further description of the above technical solution:

[0018] One end of the press pin has a slot, and the other end of the buckle ring is fixed by two sets of cylindrical pins.

[0019] This utility model has the following beneficial effects:

[0020] 1. Enables flexible adjustment and movement of the support device: Two sets of movable vehicles equipped with wheels facilitate movement within the tunnel; rotating the sleeve utilizes its two sets of opposite threads to drive the bidirectional threaded rod, thereby adjusting the spacing between the support plates, allowing the support device to adapt to pilot tunnels of different sizes on both sides of the tunnel, and meeting diverse construction needs.

[0021] 2. Provide stable large-area support: The two support plates are moved by bidirectional threaded rods to fit against the inner wall of the tunnel. The bottom is fixed to the movable vehicle by connecting rods to form a stable support structure, providing large-area support for the inner wall of the tunnel and further enhancing the stability of the tunnel structure.

[0022] 3. Rapid connection and enhanced integrity: The cylindrical pin, connecting column, iron ring and other components in the connection device achieve the initial connection and positioning of the two sets of support plates, and then complete the firm connection through the snap ring and pressable pin, which quickly enhances the integrity of the support structure and improves construction efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an integrated device for tunnel pilot excavation and steel arch frame installation proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of an integrated device for tunnel pilot excavation and steel arch frame installation proposed in this utility model;

[0025] Figure 3 The present utility model proposes Figure 2 Enlarged view of point A in the middle.

[0026] Legend:

[0027] 1. Tunnel body; 2. Hole; 3. Water trough; 4. Support device; 5. Movable vehicle; 6. Wheel; 7. Cylindrical slot; 8. Connecting rod; 9. Fixing pin; 10. Two-way threaded rod; 11. Sleeve; 12. Support plate; 13. Connecting device; 131. Cylindrical pin one; 132. Connecting column; 133. Iron ring; 134. Cylindrical pin two; 135. Snap ring; 136. Pressable pin. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The utility model will be further described in detail below with reference to the accompanying drawings.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example 1

[0031] like Figures 1 to 3 As shown, this embodiment provides an integrated device for tunnel pilot excavation and steel arch frame installation, including: a tunnel body 1, with a plurality of holes 2 between the outer wall and the inner wall of the tunnel body 1 to enhance the support strength of the overall structure; a water tank 3, with a plurality of water tanks 3 located below the inner wall of the tunnel body 1 to drain accumulated water; and a support device 4 located inside the tunnel body 1.

[0032] In this embodiment, the bidirectional threaded rod 10 constitutes an integrated device for tunnel pilot excavation and steel arch frame installation as described in this application.

[0033] It should also be understood that traditional steel support technology uses H-beams or I-beams, which are welded or bolted together to form a frame structure. During construction, holes are drilled at regular intervals along the excavation outline of the pilot tunnels on both sides of the tunnel. Anchor bolts are inserted to fix one end of the steel section, while the other end is tightly bonded to the surrounding rock with shotcrete. Relying on the rigidity of the steel section itself, the pressure generated by the surrounding rock after tunnel excavation is transferred to the stable rock mass. At the same time, the shotcrete forms a protective layer on the surface of the steel section, preventing weathering and spalling of the surrounding rock, and together with the steel section, they form a support system that maintains the stability of the tunnel structure.

[0034] In this embodiment, the user presses the pressable pin 136 to push the support device 4 so that the iron ring 133 fits into the buckle ring 135. Then, the user releases the pressable pin 136 to connect the two rings, thus fixing the two sets of support plates 12. This operation is repeated on the other side. The support device 4 is then pushed to a suitable position. Standing above the support device 4, the user rotates the sleeve 11. The internal thread of the sleeve 11 drives the bidirectional threaded rod 10 to rotate, thereby adjusting the support distance by moving the two support plates 12 closer or further apart according to the threads. After this support is completed, the support device 4 is pushed to the remaining position for further installation. After the support is completed, the two sets of connecting devices 13 are disconnected, and the two sets of support devices 4 are removed from the tunnel.

[0035] Specifically, the support device 4 includes: a movable vehicle 5, located above the bottom of the inner wall of the tunnel body 1, in two sets, with wheels 6 respectively installed at the four corners below the movable vehicle 5; cylindrical slots 7, located on the side of the movable vehicle 5, in several evenly distributed, through which connecting rods 8 can be inserted; fixing pins 9, located on both sides above the movable vehicle 5, with slots at the top, through which bidirectional threaded rods 10 pass through the slots and through the two sets of fixing pins 9 and are connected to the support plate 12 at both ends; and a sleeve 11, having two sets of opposite threads, which is rotatably connected to the fixing pins 9, with the two sets of bidirectional threaded rods 10 having two sets of opposite threads and being threadedly connected to the two ends of the sleeve 11.

[0036] In this embodiment, the movable vehicle 5 is rectangular in shape, with two sets located above the bottom of the inner wall of the tunnel body 1. Four wheels 6 are installed at the four corners of the movable vehicle 5 for easy movement within the tunnel. Cylindrical slots 7 are horizontally arranged on the sides of the movable vehicle 5 for inserting connecting rods 8. Fixing pins 9, made of steel, are located on both sides above the movable vehicle 5, with slots at the top. Two-way threaded rods 10 pass through these slots, penetrating the two sets of fixing pins 9 and connecting to the support plates 12 at both ends. Sleeves 11 are hollow cylinders with two sets of opposite threads, rotatably connected to the fixing pins 9. The two sets of two-way threaded rods 10 are threadedly connected to the sleeves 11. Rotating the sleeves 11 uses their opposite threads to move the two-way threaded rods 10, thus adjusting the spacing between the support plates 12. The wheels 6 provide movement, and the cylindrical slots 7 are used to fix the connecting rods 8. This allows for the movement of the support device 4 and adjustment of its support range to meet the needs of different tunnel sizes.

[0037] Specifically, the support device 4 further includes a support plate 12, which is respectively installed at one end of two sets of bidirectional threaded rods 10 for supporting the inner wall of the tunnel body 1, and the bottom of the support plate 12 is fixed to one end of the connecting rod 8.

[0038] In a preferred embodiment, two support plates 12, made of Q345 steel, are respectively installed at the outer ends of two sets of bidirectional threaded rods 10 to support the inner wall of the tunnel body 1. The bottom of the support plate 12 is fixed to one end of the connecting rod 8 by welding, and the connecting rod 8 is fixed in place with the cylindrical slot 7 on the side of the movable vehicle 5. The bidirectional threaded rods 10 drive the support plate 12 to move, making it fit against the inner wall of the tunnel, forming a stable support structure with the movable vehicle 5 through the connecting rod 8. This provides large-area support for the inner wall of the tunnel, enhancing the stability of the tunnel structure. Example 2

[0039] Based on Embodiment 1, in order to ensure the distance between the two sets of movable vehicles 5, a connecting device is arranged on the support plate 12;

[0040] Specifically, a connecting device 13 is also provided on the support plate 12, which is used to connect the two sets of support plates 12.

[0041] In this embodiment, the connecting device 13 is located close to the inner side of the support plate 12 and is used to connect the two sets of support plates 12 to form an integral support structure.

[0042] Specifically, the connecting device 13 includes: a cylindrical pin 131, which is vertically fixed to one side of the inner wall of a set of support plates 12; two sets of connecting columns 132, one end of which is fixed to the cylindrical pin 131, and the other end has a hole 2, with an iron ring 133 fitted in the hole 2; and a cylindrical pin 134, which is located on one side of the inner wall of another set of support plates 12, and the other end is connected to the second set of connecting columns 132.

[0043] In this configuration, cylindrical pin 131 is a cylinder, vertically welded and fixed to the left middle of the inner wall of a set of support plates 12. There are two sets of connecting pins 132, both cylindrical, with one end welded to cylindrical pin 131 and the other end having a hole into which an iron ring 133 is fitted. Cylindrical pin 134 is a cylinder, located on the right middle of the inner wall of another set of support plates 12, with its other end welded to the second set of connecting pins 132. The rotation of the iron ring 133 within the hole of the connecting pin 132 achieves the initial connection and positioning of the two sets of support plates 12. This initial connection facilitates subsequent fixing operations. Example 3

[0044] Based on Embodiment 2, in order to enable quick assembly and disassembly of the two sets of support plates 12, a pressable buckle is used in the connecting device 13;

[0045] Specifically, the connecting device 13 further includes: a snap ring 135, located in a slot at one end of the second set of connecting posts 132, which is a notched ring, with a pressable pin 136 installed at one end.

[0046] The locking ring 135 is a C-shaped notched ring located in a slot at one end of the second set of connecting columns, with a pressable pin 136 installed at one end. One end of the pressable pin 136 has a slot. Pressing the pressable pin 136 aligns its slot with one end of the locking ring 135, and securing it with a cylindrical pin, thus fixing the iron ring 133 within the locking ring 135, achieving a secure connection between the two sets of support plates 12. This quickly completes the fixing of the two sets of support plates 12, enhancing the overall integrity of the support structure.

[0047] Specifically, one end of the pressing pin 136 has a slot and the other end of the buckle ring 135 is fixed by two sets of cylindrical pins.

[0048] In this embodiment, one end of the pressable pin 136 has a slot, which is fixed to one end of the snap ring 135 by two cylindrical pins, realizing the movable connection and fixation of the two. The cylindrical pins limit the relative position of the pressable pin 136 and the snap ring 135, and the connection and separation operations are realized by pressing the pressable pin 136. This ensures the convenience of connecting and disassembling the connecting device 13.

[0049] In actual use, the user presses the pressable pin 136 to push the support device 4 so that the iron ring 133 is fitted into the buckle ring 135. Then, the user releases the pressable pin 136 to connect the two rings, which is used to fix the two sets of support plates 12. Repeat this operation on the other side. Then, push the support device 4 to the appropriate position, stand above the support device 4, and rotate the sleeve 11. The internal thread of the sleeve 11 drives the bidirectional threaded rod 10 to rotate, thereby adjusting the support distance by moving the two support plates 12 closer or further apart according to the threads. After the support is completed, push the support device 4 to the remaining position and continue the installation. After the support is completed, disconnect the two sets of connecting devices 13 and remove the two sets of support devices 4 from the tunnel.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated device for tunnel pilot excavation and steel arch frame installation, characterized in that: include: The tunnel body (1) has several holes (2) between its outer wall and inner wall to enhance the overall structural support strength. Water tank (3), several water tanks (3) are provided below the inner wall of the tunnel body (1) and can be used to drain accumulated water; The support device (4) is located inside the tunnel body (1).

2. The integrated device for tunnel pilot excavation and steel arch frame installation according to claim 1, characterized in that: The support device (4) includes: a movable vehicle (5), located above the bottom of the inner wall of the tunnel body (1), in two sets, with wheels (6) respectively installed at the four corners below the movable vehicle (5); There are several cylindrical slots (7) located on the side of the movable vehicle (5), which are evenly distributed, and the connecting rod (8) can be inserted into them; Fixed pins (9) are set on both sides above the movable vehicle (5), with slots on the top. The two-way threaded rod (10) passes through the slots and passes through the two sets of fixed pins (9), and both ends are connected to the support plate (12). The sleeve (11) has two sets of opposite threads and is rotatably connected to the fixed pin (9). The two sets of bidirectional threaded rods (10) are two sets of opposite threads and are threaded to both ends of the sleeve (11).

3. The integrated device for tunnel pilot excavation and steel arch frame installation according to claim 2, characterized in that: The support device (4) further includes a support plate (12), which is respectively set at one end of two sets of bidirectional threaded rods (10) for supporting the inner wall of the tunnel body (1), and the bottom of the support plate (12) is fixed to one end of the connecting rod (8).

4. The integrated device for tunnel pilot excavation and steel arch frame installation according to claim 3, characterized in that: A connecting device (13) is also provided on the support plate (12), which is used to connect the two sets of support plates (12).

5. The integrated device for tunnel pilot excavation and steel arch frame installation according to claim 4, characterized in that: The connecting device (13) includes: a cylindrical pin (131) which is vertically fixed to one side of the inner wall of a set of support plates (12); There are two sets of connecting columns (132). One end is fixed to a cylindrical pin (131), and the other end has a hole (2). An iron ring (133) is fitted into the hole (2). The second cylindrical pin (134) is located on one side of the inner wall of another set of support plates (12), and its other end is connected to the second set of connecting columns (132).

6. The integrated device for tunnel pilot excavation and steel arch frame installation according to claim 5, characterized in that: The connecting device (13) further includes: a snap ring (135), located in a slot at one end of the second set of connecting posts (132), which is a notched ring, with a pressable pin (136) installed at one end.

7. The integrated device for tunnel pilot excavation and steel arch frame installation according to claim 6, characterized in that: The press pin (136) has a slot at one end and a buckle ring (135) at the other end, which is fixed by two sets of cylindrical pins.

Images