Grouting pipe for tunnel lining cavity grouting
By designing a grouting tube with trapezoidal ring table, diversion groove and cone cylinder, combined with screw rod and threaded cylinder structure, the problem of grouting tube falling off is solved, and the stable fixation of grouting tube and effective bonding of concrete is achieved. , ensure the safety of tunnel traffic.
Patent Information
- Application Number
- CN202421261517.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-06-04
AI Technical Summary
In the grouting backfilling of existing tunnel lining hollows, the grouting pipe is prone to fall off, affecting the safety of tunnel traffic.
A grouting pipe is designed, with one end of which is equipped with external threads and anti-retardant sections. The outer layer of the anti-retardant section is a trapezoidal ring table with coaxial fixed set, with internal flow guide grooves and cones, combining screws and threads. The cylinder structure ensures that the grouting pipe is fixed and not removed after the concrete solidifies.
Effectively prevent the grouting pipe from falling off, bonding with the lining through solidification of the concrete slurry, fixing the position of the grouting pipe, and preventing the concrete core from falling off during long-term use.
Smart Images
Figure CN222296246U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tunnel lining construction, and in particular relates to a grouting pipe for grouting a tunnel lining cavity. Background Art
[0002] Tunnel linings may have void defects due to poor geology or construction quality. Void defects can cause damage to the lining structure, so the lining voids need to be treated. One of the commonly used treatment methods is grouting backfilling. The grouting backfilling process first drills a number of grouting holes at the void location and buries grouting pipes in the grouting holes; then uses the grouting pipe to inject concrete mortar into the void; after the mortar solidifies, the exposed part of the grouting pipe is cut off. After the grouting backfilling is completed, the grouting pipe is reserved in the lining, so measures need to be taken to prevent the reserved grouting pipe from falling off and affecting the traffic safety of the tunnel. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a grouting pipe for grouting a tunnel lining cavity in view of the deficiencies of the prior art.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0005] A grouting pipe for grouting tunnel lining cavities, one end of the grouting pipe is a threaded end provided with an external thread, and the other end is an anti-recession section; the outer layer of the anti-recession section is a plurality of coaxially fixedly arranged trapezoidal annular platforms, the thick ends of the trapezoidal annular platforms are all facing the threaded end, and the maximum diameters of the trapezoidal annular platforms are all consistent with the outer diameter of the grouting pipe; the anti-recession section is also provided with an axial guide groove.
[0006] Furthermore, an annular ramp is coaxially fixedly arranged inside the end of the anti-retreat section, and the end with a smaller inner diameter of the ramp faces the threaded end; the end of the anti-retreat section is also axially provided with a plurality of dividing grooves for dividing the ramp and the end of the anti-retreat section; a cone is also coaxially arranged inside the end of the anti-retreat section, and the thin end of the cone faces the threaded end, and the maximum diameter of the cone is larger than the minimum inner diameter of the ramp; a screw is also coaxially arranged inside the grouting pipe, and the screw is fixedly connected to the cone.
[0007] Furthermore, a threaded barrel is coaxially arranged inside the threaded end, and the threaded barrel is threadedly connected to the screw rod; the threaded barrel is fixedly connected to the grouting pipe by using a plurality of radially arranged connecting plates.
[0008] Furthermore, a hexagonal boss is fixedly provided on one end of the screw rod away from the cone cylinder.
[0009] Furthermore, a retaining ring is fixedly provided on the screw rod near the threaded barrel, and the retaining ring is used to provide a limit for the axial displacement of the screw rod.
[0010] Furthermore, the screw rod is fixedly connected to the cone cylinder by using a plurality of radially arranged connecting plates.
[0011] Furthermore, the diameter of the circumscribed circle of the hexagonal boss is smaller than the outer diameter of the screw rod.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] One end of the grouting pipe provided by the utility model is an anti-retraction section, and the outer layer of the anti-retraction section is a plurality of coaxially fixed trapezoidal rings, which can prevent the grouting pipe from being easily dislodged from the grouting hole; when the concrete slurry injected into the cavity solidifies, it will wrap the trapezoidal ring, and the grouting pipe will not be dislodged from the concrete, thus preventing the grouting pipe from falling off. At the same time, the utility model is also provided with a guide groove, and the concrete slurry can penetrate into the trapezoidal rings located inside the grouting hole along the guide groove. When this part of the slurry solidifies, it will bond with the lining, thereby fixing the grouting pipe in the grouting hole and preventing the grouting pipe from falling off.
[0014] The utility model can also use the cone to prop open the end of the anti-retreat section, so that the end of the anti-retreat section of the grouting pipe can expand. When the injected concrete slurry solidifies, the grouting pipe will be completely limited and fixed and cannot fall off.
[0015] The grouting pipe provided by the utility model is also provided with a screw rod inside. On the one hand, the screw rod can pull the cone to move by rotating; on the other hand, after long-term use of the tunnel, even if the solidified concrete in the grouting pipe is separated from the concrete in the cavity, the concrete core in the grouting pipe will not fall off from the grouting pipe due to the action of the external thread of the screw rod. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0017] Figure 1 : A schematic diagram of the structure of Embodiment 1 of the present utility model;
[0018] Figure 2 : A schematic diagram of the structure of the anti-retreat section in Example 1 of the utility model;
[0019] Figure 3 : A schematic diagram of the structure of Embodiment 2 of the present utility model;
[0020] Figure 4 : A schematic diagram of the structure of the anti-retreat section of Embodiment 2 of the present utility model;
[0021] Figure 5 : A cross-sectional view of the anti-retreat section of Example 2 of the utility model;
[0022] Figure 6 : A cross-sectional view of the threaded end of Embodiment 2 of the present utility model;
[0023] Among them: 1-trapezoidal ring platform, 2-guide groove, 3-dividing groove, 4-conical cylinder, 5-inclined platform, 6-screw rod, 7-threaded cylinder, 8-hexagonal boss, 9-retaining ring. DETAILED DESCRIPTION
[0024] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments and drawings, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.
[0025] Example 1: See Figure 1-Figure 2 The purpose of this embodiment is to provide a grouting pipe for grouting a tunnel lining cavity. The grouting pipe is a round pipe, one end of which is a threaded end provided with an external thread, and the other end is an anti-recession section provided with a trapezoidal ring platform 1.
[0026] like Figure 2 As shown, the outer layer of the anti-retreat section of the grouting pipe is a plurality of coaxially fixed trapezoidal ring platforms 1, the diameter of the trapezoidal ring platform 1 close to the threaded end of the grouting pipe is thicker, and the maximum diameter of the trapezoidal ring platform 1 is consistent with the diameter of the grouting pipe.
[0027] When installing the grouting pipe, first, a grouting hole is drilled on the lining, and the diameter of the grouting hole is consistent with the diameter of the grouting pipe. Then, the anti-recession section of the grouting pipe is inserted into the grouting hole, and the grouting pipe is knocked with a tool so that its end extends into the lining cavity. Due to the effect of the anti-recession section, the grouting pipe is not easy to fall out of the grouting hole. After the concrete grouting is completed and solidified, the solidified concrete will wrap the trapezoidal ring platform 1, so that the grouting pipe will not fall out of the concrete, thus avoiding the grouting pipe from falling off.
[0028] Furthermore, a guide groove 2 is provided on the anti-recession section of the grouting pipe, and the guide groove 2 extends along the axis from the end of the anti-recession section of the grouting pipe, and penetrates a plurality of trapezoidal ring platforms 1. When grouting is performed using the grouting pipe, the concrete slurry will penetrate along the guide groove 2 into the trapezoidal ring platforms 1 located inside the grouting hole, and this part of the slurry will bond with the lining when solidified, thereby fixing the grouting pipe in the grouting hole to prevent the grouting pipe from falling off.
[0029] Example 2: See Figure 3-Figure 6 The grouting pipe for grouting the tunnel lining cavity provided in this embodiment mainly has the following improvements compared with embodiment 1:
[0030] like Figure 4 , Figure 5As shown, an annular ramp 5 is coaxially fixedly arranged inside the end of the anti-retreat section of the grouting pipe, and the inner diameter of the ramp 5 gradually decreases when extending toward the threaded end of the grouting pipe; the end of the anti-retreat section of the grouting pipe and the ramp 5 are also divided into a multi-petal structure by a plurality of axially extending dividing grooves 3; a cone 4 is arranged inside the end of the anti-retreat section of the grouting pipe, and the diameter of the cone 4 at one end facing the threaded end of the grouting pipe is smaller, and the maximum diameter of the cone 4 is greater than the minimum inner diameter of the ramp 5. Therefore, when the cone 4 moves axially from the end of the anti-retreat section of the grouting pipe, the ramp 5 will be opened, so that the end of the anti-retreat section of the grouting pipe will expand, so that when the injected concrete slurry solidifies, the grouting pipe will be completely fixed and cannot fall off.
[0031] A coaxial screw rod 6 is arranged in the grouting pipe, and the diameter of the screw rod 6 is smaller than the minimum inner diameter of the cone 4. The screw rod 6 is fixedly connected to the cone 4 by a plurality of connecting plates arranged in the radial direction. The cone 4 still has a through cavity, and the concrete slurry injected in the grouting pipe will be injected into the lining cavity along the cone 4 and the dividing groove 3.
[0032] like Figure 6 As shown, a coaxial threaded barrel 7 is provided inside the threaded end of the grouting pipe, and the threaded barrel 7 is threadedly connected to the screw rod 6 through an internal thread. The threaded barrel 7 is also fixedly connected to the grouting pipe by using a plurality of connecting plates arranged along the radial direction. At the same time, a hexagonal boss 8 is fixedly provided at the end of the screw rod 6 located at the threaded end of the grouting pipe, and the circumscribed circle diameter of the hexagonal boss 8 is smaller than the outer diameter of the screw rod 6. After the hexagonal sleeve-like tool is fitted on the hexagonal boss 8, the screw rod 6 can be conveniently rotated, thereby pulling the cone barrel 4 to open the inclined platform 5. There is a space between the threaded barrel 7 and the inner wall of the grouting pipe, which will not affect the normal transportation of concrete slurry.
[0033] A retaining ring 9 is fixedly provided on the screw rod 6 near the threaded tube 7. When the screw rod 6 moves to make the retaining ring abut against the threaded tube 7, the retaining ring 9 will limit the continued rotation of the screw rod 6 to prevent the cone tube 4 from being pulled out of the inclined platform 5, and can fix the cone tube 4 in the position of supporting the inclined platform 5.
[0034] At the same time, after the tunnel is used for a long time, even if the solidified concrete in the grouting pipe is separated from the concrete in the cavity, the concrete core in the grouting pipe will not fall off from the grouting pipe under the action of the external thread of the screw rod 6.
[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.
Claims
1. A grouting pipe for grouting a tunnel lining cavity, characterized in that: One end of the grouting pipe is a threaded end provided with an external thread, and the other end is an anti-retraction section; The outer layer of the anti-recession section is a plurality of coaxially fixed trapezoidal ring platforms, the thick ends of the trapezoidal ring platforms are all facing the threaded ends, and the maximum diameters of the trapezoidal ring platforms are consistent with the outer diameter of the grouting pipe; The anti-retreat section is also provided with an axial guide groove.
2. The grouting pipe for grouting of tunnel lining cavities according to claim 1, characterized in that: An annular inclined platform is coaxially fixedly disposed in the end of the anti-retraction section, and the end of the inclined platform with a smaller inner diameter faces the threaded end; The end of the anti-recession section is also provided with a plurality of dividing grooves along the axial direction for dividing the ramp and the end of the anti-recession section; A conical cylinder is coaxially arranged in the end of the anti-recession section, the thin end of the conical cylinder faces the threaded end, and the maximum diameter of the conical cylinder is greater than the minimum inner diameter of the ramp; A screw rod is coaxially arranged in the grouting pipe, and the screw rod is fixedly connected to the cone cylinder.
3. The grouting pipe for grouting of tunnel lining cavities according to claim 2, characterized in that: A threaded barrel is coaxially arranged inside the threaded end, and the threaded barrel is threadedly connected to the screw rod; the threaded barrel is fixedly connected to the grouting pipe by using a plurality of radially arranged connecting plates.
4. The grouting pipe for grouting a tunnel lining cavity according to claim 3, characterized in that: A hexagonal boss is fixedly arranged at one end of the screw rod away from the cone cylinder.
5. The grouting pipe for grouting of tunnel lining cavities according to claim 3, characterized in that: A retaining ring is fixedly arranged on the screw rod near the threaded barrel, and the retaining ring is used to provide a limit for the axial displacement of the screw rod.
6. The grouting pipe for grouting a tunnel lining cavity according to claim 2, characterized in that: The screw rod is fixedly connected to the cone cylinder by using a plurality of radially arranged connecting plates.
7. The grouting pipe for grouting a tunnel lining cavity according to claim 4, characterized in that: The diameter of the circumscribed circle of the hexagonal boss is smaller than the outer diameter of the screw rod.