A tunnel construction apparatus near an existing road
Patent Information
- Application Number
- CN202521915888.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-05
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-09-05
AI Technical Summary
[0003]本实用新型旨在提供一种集成在一起的能够同时支撑多根钢拱架的近现有道路的隧道施工设备，解决了现有的隧道在既有隧道旁施工时现打支撑结构进行支撑费时的问题
[0011]作为优选，所述竖孔内设有螺纹套，所述驱动杆螺纹连接在所述螺纹套内，所述插钎的上端设有正六棱柱段，所述驱动杆的上端设有位于插钎上方的驱动通孔。设置螺纹套进行螺纹连接，驱动杆进入竖孔驱动阻拦杆时省力，而且能够使阻拦维持在不能够合拢的状态；设置正六棱柱段使得能够通过扳手转动插钎；设置驱动通孔，使用使将杆体插入驱动通孔去转动驱动杆。有益效果：能够有效防止隧道隔壁塌方；支撑设备能够快速对多根钢拱架进行支撑；同地面之间的固定可靠。
Smart Images
Figure CN224648564U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tunnel construction technology, and in particular to a tunnel construction device for existing roads. Background Technology
[0002] Tunnel construction often involves encountering existing tunnels adjacent to each other. If the distance between the two tunnels is small, the construction of the new tunnel can damage the existing one. The most common form of damage is the collapse of the tunnel wall between the two tunnels. To address this, those skilled in the art have developed a construction method that involves excavating the side closer to the existing tunnel first, then supporting it, and finally excavating the side farther from the existing tunnel. Current construction equipment uses on-site scaffolding for support, which is time-consuming to install and dismantle. Utility Model Content
[0003] The present invention aims to provide a tunnel construction device that integrates multiple steel arch frames and is suitable for use near existing roads, thereby solving the problem of time-consuming on-site support structures when constructing tunnels next to existing tunnels.
[0004] To achieve the above objectives, this utility model employs the following technology: a tunnel construction device for near-existing roads, characterized in that it includes support legs, a platform connected to the support legs, a motor connected to the lower surface of the platform, and a drive unit located above the platform and connected to the output end of the motor. A fixing block is fixedly installed on the drive unit, and a vertical support rod for supporting steel arch frames near the existing tunnel section is fixedly installed at the upper end of the fixing block. The drive unit includes a sliding tube fixedly installed on the platform, with an installation block slidably connected inside the sliding tube. The installation block has a threaded through hole, and the installation block is fixedly connected to the fixing block. A threaded rod threadedly connected to the threaded through hole is fixedly installed at the output end of the motor. An oblique support is provided on each side of the fixing block along the tunnel extension direction. The vertical support rod and the two oblique supports are correspondingly supported on three adjacent steel arch frames near the existing tunnel section. Adjacent steel arch frames near the existing tunnel section are connected by at least two horizontal tie rods located on the same vertical plane. The integrated support equipment can simultaneously support multiple steel arch frames. Disassembly is quick and convenient.
[0005] Preferably, the horizontal tie rod is spherically hinged to the steel arch frame near the existing tunnel section. This allows the steel arch frame to have independent space for movement.
[0006] Preferably, the fixing block has an inner cavity. The motor output end is connected to the threaded rod and a drive shaft passing through the threaded rod via a first clutch. The inclined support includes a cylinder body with its blind end abutting against the existing tunnel section of the steel arch, a piston slidably connected in the cylinder body, and a piston rod connected to the piston at one end through the opening end of the cylinder body. The other end of the piston rod is hinged to the fixing block via a hinge shaft. The piston isolates a sealed cavity within the cylinder body. The sealed cavity is equipped with an exhaust valve. The piston rod has an air supply channel that passes through the piston and communicates with the sealed cavity. A booster pump is installed in the inner cavity. The outlet end of the booster pump is connected to the inlet end of the air supply channel via a flexible air supply pipe. The drive shaft is connected to the power input shaft of the booster pump via a second clutch. This technical solution allows the drive rod to extend and retract when the angle of the drive rod is different, thereby conveniently and reliably supporting three steel arches near the existing tunnel section simultaneously, and also coordinating with the fixing components to support the arch. In operation, the first external threaded pipe drives the fixed block to rise and fall, thereby supporting the arch frame. Then, the angle of the drive rod is adjusted to meet the requirements. The first clutch disengages, and the second clutch engages, causing the drive shaft to drive the air pump to supply air to the sealed cavity, thus extending the drive rod to support the arch frame. This technical solution allows the diagonal supports to extend and retract when the angles are different, thus also supporting the arch frame. In operation, the first external threaded pipe drives the fixed block to rise and fall, supporting the middle steel arch frame. Then, the angle of the drive rod is adjusted to meet the requirements. The first clutch disengages, and the second clutch engages, causing the drive shaft to drive the air pump to supply air to the sealed cavity, thus extending the diagonal supports to support the two steel arch frames on both sides. It has good versatility and a compact structure.
[0007] Preferably, the system also includes an externally threaded tube passing through the threaded rod and a threaded sleeve threadedly connected to the externally threaded tube. The externally threaded tube is connected to the output end of the motor via a third clutch. The threaded sleeve is located within the inner cavity. The piston rod is fixed to one end of the drive handle, and the other end of the drive handle is movably connected to the threaded sleeve. In use, the third clutch is engaged, driving the threaded sleeve to rise and fall via the externally threaded tube. The threaded sleeve drives the drive handle to rotate around the hinge axis, causing the inclined support to rotate synchronously, thereby adjusting the angle of the inclined support. This is a technical solution for adjusting the inclined support using a common motor.
[0008] Preferably, the threaded sleeve has a pivot pin on its exterior, and the drive handle has an elongated hole extending along the extension direction of the drive handle. The pivot pin passes through the elongated hole and is parallel to the hinge shaft. This provides a specific technical solution for the movable connection between the drive handle and the threaded sleeve.
[0009] Preferably, the support foot is provided with a connecting lug having a vertical through hole, the vertical through hole being a threaded hole, and a drill bit for insertion into the bottom surface of the tunnel hole is threadedly connected inside the vertical through hole. The drill bit has a vertical hole with its lower end closed and its upper end penetrating the upper surface of the drill bit. The lower end of the outer circumference of the drill bit has a vertical receiving groove distributed along the circumference of the drill bit. A blocking rod is provided in the receiving groove, and the upper end of the blocking rod is hinged to the receiving groove via a hinge shaft. The bottom wall of the receiving groove has a through hole, and the upper end of the blocking rod is connected to a drive arm that passes through the through hole and extends into the vertical hole. A drive rod is inserted through the vertical hole, which presses the drive arm to rotate the lower end of the blocking rod about the hinge shaft to the outside of the receiving groove. In use, first rotate the insert rod to insert it into the bottom of the tunnel hole and fix the support foot. Then, press down the drive rod to press the drive arm, causing the lower end of the barrier bar to rotate around the hinge axis to the outside of the receiving groove to a set length, maintaining the barrier bar in its current state. The barrier bar increases the force required to pull out the insert rod, making it more difficult to pull out and ensuring more reliable fixation of the support foot. When it is necessary to pull out the insert rod, it loses its fixing effect on the barrier bar. Then, rotate the insert rod to pull it out. When the insert rod is pulled out, the barrier bar can close into the receiving groove, thus preventing the addition of the barrier bar from making it difficult to pull out the insert rod.
[0010] Preferably, the surface of the blocking rod away from the bottom wall of the receiving groove has a vertical cutting edge facing away from the bottom wall of the receiving groove. Blocking strips are inserted on both sides of the blocking rod along the width of the receiving groove. Two blocking strips are connected together by a spring, which drives the two blocking strips to separate and extend from the blocking rod. The outer end of the blocking strip facing the bottom wall of the receiving groove has a guide surface. This guide surface is used to be pressed by the end of the side wall of the receiving groove away from the bottom wall, causing the blocking strip to retract into the blocking rod. The blocking strip is only outside the receiving groove along its entire length when the length of the blocking rod extending out of the receiving groove reaches a set value. This design makes it easier to extend the blocking rod out of the receiving groove, and after the blocking rod extends to its full position, the width of the blocking strip increases, thereby increasing the effectiveness of pulling out the insert. The guide surface allows the blocking strip to reset, preventing the blocking rod from failing to re-enter the receiving groove and reset when the insert is pulled out.
[0011] Preferably, a threaded sleeve is provided inside the vertical hole, and the drive rod is threadedly connected to the threaded sleeve. The upper end of the insertion rod has a regular hexagonal prism section, and the upper end of the drive rod has a drive through hole located above the insertion rod. The threaded sleeve provides a threaded connection, making it easier for the drive rod to enter the vertical hole and drive the barrier, while also ensuring the barrier remains in an unclosed state. The regular hexagonal prism section allows the insertion rod to be rotated with a wrench. The drive through hole allows the rod to be inserted into the drive through hole to rotate the drive rod. Beneficial effects: Effectively prevents tunnel wall collapse; the support equipment can quickly support multiple steel arches; reliable fixation to the ground. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the usage state of this utility model; Figure 2 for Figure 1 Enlarged view of point D in the middle; Figure 3 for Figure 1 Enlarged view of point F in the middle; Figure 4 for Figure 1 Enlarged view of point E in the diagram; Figure 5 This is a schematic diagram showing the support foot when the insertion rod has just been inserted into the bottom of the tunnel hole. Figure 6 for Figure 5 A magnified schematic diagram of a portion at point A; Figure 7 for Figure 5 Schematic diagram of B-B section; Figure 8 A schematic diagram showing the support legs being fixed to the bottom of the tunnel bore. Figure 9 for Figure 8A magnified schematic diagram of a portion at point C. In the diagram: 1. Steel arch frame near the existing tunnel section; 2. Tunnel wall between the tunnel and the existing tunnel; 7. Support leg; 8. Platform; 9. Motor; 10. Drive component; 11. Fixing block; 12. Vertical support rod; 13. Sliding tube; 14. Mounting block; 15. Threaded rod; 16. Diagonal support; 17. Horizontal tie rod; 18. First clutch; 19. Drive shaft; 54. Connecting lug; 55. Cylinder body; 56. Piston rod; 57. Inner cavity; 58. Tunnel bore bottom; 59. Hinge shaft; 40. Sealing cavity; 41. Exhaust valve; 42. Air supply channel; 43. Booster pump; 44. Flexible air supply pipe; 45. Second clutch 46, external threaded pipe 47, threaded sleeve 48, third clutch 49, motor output end 50, drive handle 51, shaft pin 52, elongated hole 53, vertical through hole 20, insert pin 21, vertical hole 22, regular hexagonal prism segment 23, receiving groove 24, blocking bar 25, hinge shaft 26, through hole 27, drive arm 28, drive rod 29, threaded sleeve 30, drive through hole 31, vertical cutting edge 32, blocking bar 33, spring 34, bottom wall of receiving groove 35, guide surface 36, the end of the side wall of receiving groove away from the bottom wall of receiving groove 37. Detailed Implementation
[0013] 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.
[0014] See Figures 1 to 9A tunnel construction device for near-existing roads includes a support leg 7, a platform 8 connected to the support leg, a motor 9 connected to the lower surface of the platform, and a drive unit 10 connected to the output end of the motor and located above the platform. A fixing block 11 is fixedly installed on the drive unit, and a vertical support rod 12 supporting a steel arch near the existing tunnel section 1 is fixedly installed on the upper end of the fixing block. The steel arch near the existing tunnel section is supported on the tunnel wall 2 between the tunnel and the existing tunnel. The drive unit includes a sliding tube 13 fixedly installed on the platform, and an installation block 14 is slidably connected inside the sliding tube. The installation block has a threaded through hole, and the installation block is fixedly connected to the fixing block. A threaded rod 15 threadedly connected to the threaded through hole is fixedly installed on the output end of the motor. An inclined support 16 is provided on each side of the fixing block along the tunnel extension direction. The vertical support rod and the two inclined supports are supported one-to-one on three adjacent steel arch near the existing tunnel sections. Two adjacent steel arch near the existing tunnel sections are connected together by at least two horizontal tie rods 17, and the horizontal tie rods are located on the same vertical plane. A horizontal tie rod is spherically hinged to the steel arch frame near the existing tunnel section. The fixed block has an inner cavity 58. The motor output end is connected to a threaded rod and a drive shaft 19, which passes through the threaded rod, via a first clutch 18. The diagonal support includes a cylinder 55 with its blind end abutting against the steel arch frame near the existing tunnel section, a piston 56 that is slidably connected to the cylinder, and a piston rod 57 that enters the piston through the open end of the cylinder and is connected to the piston. The other end of the piston rod is hinged to the fixed block via a hinge shaft 40. The piston isolates a sealed cavity 41 within the cylinder. The sealed cavity is equipped with an exhaust valve 42. The piston rod is equipped with an air supply channel 43 that connects the piston to the sealed cavity. A booster pump 44 is installed in the inner cavity. The outlet end of the booster pump is connected to the inlet end of the air supply channel via a flexible air supply pipe 45. The drive shaft is connected to the power input shaft of the booster pump via a second clutch 46. It also includes an externally threaded tube 47 passing through the threaded rod and a threaded sleeve 48 threadedly connected to the externally threaded tube. The externally threaded tube is connected to the output end 50 of the motor via a third clutch 49. The threaded sleeve is located in the inner cavity. The piston rod is fixed to one end of the drive handle 51. The other end of the drive handle is movably connected to the threaded sleeve. Specifically, the threaded sleeve is provided with a pin 52 on its outside, and the drive handle is provided with an elongated hole 53 extending along the extension direction of the drive handle. The pin passes through the elongated hole and is parallel to the hinge shaft.
[0015] The support foot is provided with a connecting lug 54 having a vertical through hole 20, which is a threaded hole. A drill bit 21 for insertion into the bottom surface of the tunnel bore is threaded into the vertical threaded through hole. The drill bit has a vertical hole 22, closed at the bottom and penetrating the upper surface of the drill bit. The upper end of the drill bit has a regular hexagonal prism section 23. The lower end of the outer circumference of the drill bit has several vertically distributed receiving grooves 24. A blocking rod 25 is provided in each receiving groove. The upper end of the blocking rod is hinged to the receiving groove via a hinge shaft 26. A through hole 27 is provided on the bottom wall of the receiving groove. A drive arm 28, passing through the through hole and extending into the vertical hole, is connected to the upper end of the blocking rod. A drive rod 29, which presses the drive arm to rotate the lower end of the blocking rod around the hinge shaft to the outside of the receiving groove, is inserted into the vertical hole. A threaded sleeve 30 is provided in the vertical hole, and the drive rod is threaded into the threaded sleeve. The upper end of the drive rod has a drive through hole 31 located above the drill bit.
[0016] In use, first rotate the insert rod to insert it into the bottom of the tunnel bore and fix the support foot. Then, press down the drive rod to press the drive arm (specifically, rotate the drive rod to press it down), causing the lower end of the barrier arm to rotate around the hinge axis to the outside of the receiving groove to the set length, and maintaining the barrier arm in its current state. When it is necessary to remove the insert rod, it loses its fixing effect on the barrier arm (even if the drive rod rises to the position where the barrier drive arm is no longer in place). Then, rotate the insert rod to pull it out. When the insert rod is pulled out, the barrier arm can close into the receiving groove.
[0017] The surface of the barrier bar away from the bottom wall of the receiving groove has a vertical cutting edge 32 facing away from the bottom wall of the receiving groove. Barrier strips 33 are threaded through both sides of the barrier bar along the width of the receiving groove. Two barrier strips are connected together by several springs 34, which drive the two barrier strips to separate and extend out of the barrier bar. The outer end of the surface of the barrier strip facing the bottom wall 35 of the receiving groove has a guide surface 36. The guide surface is pressed by the end 37 of the side wall of the receiving groove away from the bottom wall, causing the barrier strip to retract into the barrier bar. The barrier bar is only outside the receiving groove along its entire length when the length of the barrier bar extending out of the receiving groove reaches a set value (in this embodiment, the barrier bar is in a position perpendicular to the insertion pin).
[0018] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A tunnel construction device for near-existing roads, characterized in that, The system includes a support leg, a platform connected to the support leg, a motor connected to the lower surface of the platform, and a drive unit located above the platform and connected to the motor output. A fixing block is fixedly mounted on the drive unit, and a vertical support rod for supporting the steel arch frame near the existing tunnel section is fixedly mounted on the upper end of the fixing block. The drive unit includes a sliding tube fixedly mounted on the platform, with a mounting block slidably connected inside the sliding tube. The mounting block has a threaded through hole and is fixedly connected to the fixing block. A threaded rod connected to the threaded through hole is fixedly mounted on the motor output. Each side of the fixing block along the tunnel extension direction has an inclined support. The vertical support rod and the two inclined supports are supported one-to-one on three adjacent steel arch frames near the existing tunnel section. Adjacent steel arch frames near the existing tunnel section are connected by at least two horizontal tie rods located on the same vertical plane.
2. The tunnel construction equipment for near-existing roads according to claim 1, characterized in that, The horizontal tie rod is spherically hinged to the steel arch frame near the existing tunnel section.
3. The tunnel construction equipment near existing roads according to claim 1 or 2, characterized in that, The fixed block has an inner cavity. The motor output end is connected to the threaded rod and a drive shaft passing through the threaded rod via a first clutch. The inclined support includes a cylinder body with its blind end abutting against the existing tunnel section of the steel arch frame, a piston that is slidably connected to the cylinder body, and a piston rod that enters the piston through the opening end of the cylinder body. The other end of the piston rod is hinged to the fixed block via a hinge shaft. The piston isolates a sealed cavity within the cylinder body. The sealed cavity is equipped with an exhaust valve. The piston rod is equipped with an air supply channel that passes through the piston and communicates with the sealed cavity. A booster pump is provided in the inner cavity. The outlet end of the booster pump is connected to the inlet end of the air supply channel via a flexible air supply pipe. The drive shaft is connected to the power input shaft of the booster pump via a second clutch.
4. The tunnel construction equipment for near-existing roads according to claim 3, characterized in that, It also includes an externally threaded tube passing through the threaded rod and a threaded sleeve threadedly connected to the externally threaded tube. The externally threaded tube is connected to the output end of the motor through a third clutch. The threaded sleeve is located in the inner cavity. The piston rod is fixed to one end of the drive handle, and the other end of the drive handle is movably connected to the threaded sleeve.
5. The tunnel construction equipment for near-existing roads according to claim 4, characterized in that, The threaded sleeve is provided with a pin on its outside, and the drive handle is provided with an elongated hole extending along the extension direction of the drive handle. The pin passes through the elongated hole and is parallel to the hinge shaft.
6. The tunnel construction equipment for near-existing roads according to claim 1, characterized in that, The support leg is provided with a connecting lug with a vertical through hole. The vertical through hole is a threaded hole. A drill bit for inserting into the bottom surface of the tunnel hole is threaded into the vertical through hole. The drill bit has a vertical hole with its lower end closed and its upper end penetrating the upper surface of the drill bit. The lower end of the outer circumference of the drill bit has a vertical receiving groove distributed along the circumference of the drill bit. A blocking rod is provided in the receiving groove. The upper end of the blocking rod is hinged in the receiving groove through a hinge shaft. The bottom wall of the receiving groove has a through hole. The upper end of the blocking rod is connected to a drive arm that passes through the through hole and extends into the vertical hole. A drive rod is inserted in the vertical hole to press the drive arm, causing the lower end of the blocking rod to rotate around the hinge shaft to the outside of the receiving groove.
7. The tunnel construction equipment for near-existing roads according to claim 6, characterized in that, The barrier bar has a vertical cutting edge on the surface of the side away from the bottom wall of the receiving groove, pointing in the direction away from the bottom wall of the receiving groove. Barrier bars are inserted on both sides of the barrier bar along the width direction of the receiving groove. The two barrier bars are connected together by a spring. The spring is used to drive the two barrier bars to separate and extend out of the barrier bar. The outer end of the surface of the barrier bar facing the bottom wall of the receiving groove has a guide surface. The guide surface is used to be squeezed by the end of the side wall of the receiving groove away from the bottom wall of the receiving groove, so that the barrier bar retracts into the barrier bar. When the length of the barrier bar extending out of the receiving groove reaches a set value, the barrier bar is located outside the receiving groove along its entire length.
8. The tunnel construction equipment near existing roads according to claim 6 or 7, characterized in that, The vertical hole is provided with a threaded sleeve, the drive rod is threadedly connected to the threaded sleeve, the upper end of the insertion rod is provided with a regular hexagonal prism segment, and the upper end of the drive rod is provided with a drive through hole located above the insertion rod.