Anchor rod for bridge and tunnel engineering
By setting a fixed pipe and a misalignment groove between the anchor bolt's grout stop plug and the pad, combined with positioning and sealing components, the problem of grout outflow affecting the judgment of grout fullness and density was solved, achieving the effect of accurate judgment and reducing grout outflow.
Patent Information
- Application Number
- CN202520366366.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-04
AI Technical Summary
During the grouting process of existing anchor bolts, the grout flows downward under the action of gravity, causing the grout to flow out from the vent hole of the grout stop plug, which affects the judgment of grout fullness. Furthermore, after the grouting is completed, the grout continues to flow out, affecting the compactness.
An anchor bolt for bridge and tunnel engineering was designed. A first fixed pipe was set between the grout stop plug and the pad plate to connect the vent hole and the through hole. The first and second grooves were set in a staggered manner on the pad plate. The positioning component and sealing component were used to ensure that the grout flow path was restricted. After grouting was completed, the through hole was sealed by the pipe plug.
This facilitates observation of the grout flow rate during the grouting process, accurately judges the grout saturation, reduces continuous grout outflow, and ensures the density of the grout after grouting.
Smart Images
Figure CN223724649U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of anchor rod, especially a bridge and tunnel engineering anchor rod. BACKGROUND
[0002] In the bridge and tunnel engineering, the anchor rod plays a vital role, in the tunnel construction, the anchor rod is the important component of the initial support, it can reinforce the surrounding rock in time, prevents the surrounding rock from collapsing and deforming, can improve the strength and stiffness of structure, can effectively limit the deformation of surrounding rock, keeps the cross section shape of tunnel, creates the safe operation environment for the subsequent construction, and moreover in some complex geological conditions tunnels, the anchor rod can also jointly act with the shotcrete, steel arch frame etc.
[0003] The anchor rod used in the tunnel at present is hollow anchor rod, its structure includes hollow rod body, makes its own have the grouting function, the one end of hollow rod body is provided with anchor head, is provided with the stopper, the gasket and the nut on the hollow rod body, is provided with the exhaust hole on the stopper, the function of stopper is just prevents the slurry from leaking when grouting in the tunnel hole, but in the use process, when the anchor rod supports the top of tunnel, inserts the anchor rod into the tunnel hole of tunnel top, when grouting in the tunnel hole, because the tunnel hole is downward, the stopper is located below, so when grouting in the tunnel hole, the slurry in the tunnel hole flows downward under the action of gravity, then flows out from the exhaust hole of stopper, but at present, before grouting, will first make the gasket close to the tunnel, makes the gasket seal the exhaust hole on the stopper to a certain extent, thereby reduces the amount of slurry flowing out from the exhaust hole of stopper when grouting.
[0004] But when grouting, the observation of the slurry flowing out from the exhaust hole of stopper is one way to judge whether the slurry in the tunnel hole is full, when grouting in the tunnel hole of top, the slurry flows downward under the action of gravity, although the gasket seals the exhaust hole on the stopper to a certain extent in the initial stage, but there is still slurry flowing out from the exhaust hole and flowing out from between the gasket and the stopper, at the same time, because the gasket blocks the exhaust hole on the stopper all the time, so after the slurry in the tunnel hole is full in the later stage, because of the block of gasket, the slurry flows around between the gasket and the stopper, thereby the speed of slurry flowing out between the gasket and the stopper is not obvious, which affects the judgment of the fullness of slurry in the tunnel hole of top, and moreover the tunnel is arc structure, after the gasket close to the tunnel wall, the gap between the gasket and the stopper is relatively large, which leads to more slurry flowing out, thereby after grouting is completed, the slurry in the tunnel hole of top continuously flows out from the exhaust hole of stopper, causes the backflow, causes the sealing to be not strict, affects the compactness. SUMMARY
[0005] The utility model discloses a bridge and tunnel engineering anchor rod, which is convenient for judging the fullness of grouting in a tunnel hole and reduces backflow of grout after grouting is completed.
[0006] The bridge and tunnel engineering anchor rod comprises a hollow rod body, a grout stopping plug, a backing plate and a nut are arranged on the hollow rod body, an exhaust hole is formed in the grout stopping plug, a through hole is formed in the backing plate, a first fixing pipe is arranged between the grout stopping plug and the backing plate, the exhaust hole and the through hole are connected and communicated through the first fixing pipe, and a sealing assembly corresponding to the through hole is arranged to seal the through hole.
[0007] Further, the first fixing pipe and the grout stopping plug are fixed, the diameter of the exhaust hole is consistent with the inner diameter of the first fixing pipe, and the diameter of the through hole in the backing plate is consistent with the outer diameter of the first fixing pipe.
[0008] Further, the through hole comprises a first groove and a second groove, the first groove and the second groove are distributed in a staggered manner, and the depths of the first groove and the second groove are respectively less than the thickness of the backing plate.
[0009] The first groove is formed on one side of the backing plate close to the grout stopping plug, the second groove is formed on one side of the backing plate away from the grout stopping plug, the first groove and the second groove are connected and communicated through a third groove formed horizontally, and the sealing assembly seals the second groove.
[0010] Further, the backing plate comprises a first backing plate and a second backing plate, the first backing plate is close to the grout stopping plug, the first groove is formed on the first backing plate, and the depth of the first groove is consistent with the thickness of the first backing plate.
[0011] The second groove is formed on one side of the second backing plate away from the first backing plate, and the third groove is formed on one side of the second backing plate close to the first backing plate.
[0012] Further, the first backing plate and the second backing plate are provided with a positioning assembly for aligning the first groove with the third groove.
[0013] Further, the positioning assembly comprises a positioning rod fixed on the first backing plate, the positioning rod is located on one side of the first backing plate close to the second backing plate, and a positioning groove for inserting the positioning rod is formed on the second backing plate.
[0014] Further, a first identification line is arranged on the side wall of the first backing plate, a second identification line is arranged on the side wall of the second backing plate, when the first identification line is aligned with the second identification line, the positioning rod is aligned with the positioning groove.
[0015] Further, the sealing assembly comprises a second fixing pipe, an outer thread is formed on the outer side wall of the second fixing pipe, the second groove is a circular structure, an inner thread is formed on the inner side wall of the second groove and is in threaded cooperation with the outer thread on the second fixing pipe, one end of the second fixing pipe protrudes out of the second groove, and a pipe plug is arranged on the end of the second fixing pipe protruding out of the second groove.
[0016] Further, the pipe plug is a groove structure, the inner side wall of the pipe plug is a circular structure, and the inner side wall of the pipe plug is provided with internal threads that are threadedly matched with external threads on the second fixing pipe.
[0017] Compared with the prior art, the utility model has the following beneficial effects:
[0018] The utility model discloses a first fixing pipe is connected with the through hole on the backing plate to the stop pulp plug, thereby avoiding the pulp liquid from flowing out between the stop pulp plug and the backing plate, limiting the path of the pulp liquid, observing the speed of the pulp liquid, and judging the fullness of the pulp liquid in the hollow rod hole on the top of the tunnel. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the utility model;
[0020] Figure 2 It is Figure 1 It is an enlarged structural schematic diagram of the middle A;
[0021] Figure 3 It is Figure 1 It is a front view structural schematic diagram;
[0022] In the drawing, the component names are as follows: 1, hollow rod body; 2, stop pulp plug; 2.1, exhaust hole; 3, first backing plate; 4, second backing plate; 5, nut; 6, second fixing pipe; 7, pipe plug; 8, first fixing pipe. DETAILED DESCRIPTION
[0023] The utility model is further described below by specific embodiments with reference to the drawings, but is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
[0024] The anchor rod for bridge and tunnel engineering described in the embodiment, as shown in Figure 1 , Figure 2 and Figure 3 , comprises a hollow rod body 1, a stop pulp plug 2, a backing plate and a nut 5 are arranged on the hollow rod body 1, an exhaust hole 2.1 is arranged on the stop pulp plug 2, the hollow rod body 1 is a hollow pipe, an outer thread is arranged on the outer side of the hollow rod body 1, an anchor head is arranged at one end of the hollow rod body 1, the structures of the hollow rod body 1, the stop pulp plug 2 and the nut 5 are the structures of the existing hollow anchor rod, a through hole is arranged on the backing plate, a first fixing pipe 8 is arranged between the stop pulp plug 2 and the backing plate, and the first fixing pipe 8 is connected with the exhaust hole 2.1 and the through hole.
[0025] The first fixed pipe 8 and the stop plug 2 are fixed, the material of the first fixed pipe 8 is consistent with that of the stop plug 2, the diameter of the exhaust hole 2.1 is consistent with the inner diameter of the first fixed pipe 8, and the diameter of the through hole on the pad is consistent with the outer diameter of the first fixed pipe 8, so that the first fixed pipe 8 can be directly inserted into the through hole on the pad; of course, in some embodiments, the first fixed pipe 8 can also be fixed with the through hole on the pad, the outer diameter of the first fixed pipe 8 is consistent with the diameter of the exhaust hole 2.1, so that one end of the first fixed pipe 8 is inserted into the exhaust hole 2.1, and the exhaust hole 2.1 and the through hole on the pad can also be connected and communicated through the first fixed pipe 8.
[0026] The through hole includes a first groove and a second groove, the first groove and the second groove are distributed in a staggered manner, and the second groove is located on the outer side of the nut 5. In order to wrap the pad on the hollow rod body 1, a mounting hole is formed on the pad, the closest distance from the second groove to the mounting hole is not less than the thickness of the nut 5, so as to avoid the nut 5 from blocking the second groove, so that the slurry flows out of the second groove, and the depths of the first groove and the second groove are respectively less than the thickness of the pad, and the first groove and the second groove are not through holes; the first groove is formed on one side of the pad close to the stop plug 2, the second groove is formed on the side of the pad away from the stop plug 2, and the first groove and the second groove are connected and communicated through a horizontally formed third groove. The horizontal third groove can block the slurry, so as to avoid the slurry from flowing directly downward, thereby slowing down the flow speed of the slurry and reducing the outflow amount of the slurry during grouting.
[0027] The pad includes a first pad 3 and a second pad 4, the first pad 3 is close to the stop plug 2, the first groove is formed on the first pad 3, and the depth of the first groove is consistent with the thickness of the first pad 3, the first groove is a circular structure for inserting the first fixed pipe 8, the second groove is formed on the side of the second pad 4 away from the first pad 3, and the third groove is formed on the side of the second pad 4 close to the first pad 3. The second pad 4 is located below the first pad 3, the second groove is formed on the bottom of the second pad 4, and the third groove is formed on the top of the second pad 4. The first pad 3 and the second pad 4 facilitate the formation of the first groove, the second groove and the third groove.
[0028] The first pad 3 is fixed with a positioning rod, the positioning rod is located on the side of the first pad 3 close to the second pad 4, the second pad 4 is formed with a positioning groove for inserting the positioning rod, and the positioning rod is located in the positioning groove. The independent rotation of the first pad 3 or the second pad 4 can be limited, so as to avoid the mispositioning of the first pad 3 and the second pad 4, and ensure that the slurry flows into the third groove after passing through the first groove.
[0029] The side wall of the first base plate 3 is provided with a first identification line, the side wall of the second base plate 4 is provided with a second identification line, the first identification line and the second identification line are colored lines painted on the side wall of the first base plate 3 and the second base plate 4, when the first identification line is aligned with the second identification line, the positioning rod is aligned with the positioning groove, because the positioning rod is located between the first base plate 3 and the second base plate 4, it is not easy to observe, through the first identification line and the second identification line, the positioning rod is aligned with the positioning groove.
[0030] The above two adjacent paragraphs constitute a positioning assembly for aligning the first groove with the third groove. Of course, in some embodiments, positioning can also be achieved directly through the identification line, or after the first groove, the second groove and the third groove are opened, the first base plate 3 and the second base plate 4 can be welded to become a whole again.
[0031] The second groove is provided with a second fixing pipe 6, the outer side wall of the second fixing pipe 6 is provided with external threads, the second groove is a circular structure, and the inner side wall of the second groove is provided with internal threads which are threadedly matched with the external threads on the second fixing pipe 6, when grouting, the second fixing pipe 6 is located in the second groove, the grout flows out from the second fixing pipe 6, one end of the second fixing pipe 6 exceeds the second groove, the one end of the second fixing pipe 6 exceeding the second groove is provided with a pipe plug 7, the pipe plug 7 is used to plug the pipe end of the second fixing pipe 6, so that the grout does not continuously flow out from the second groove after grouting is completed.
[0032] The pipe plug 7 is a groove structure, the inner side wall of the pipe plug 7 is a circular structure, and the inner side wall of the pipe plug 7 is provided with internal threads which are threadedly matched with the external threads on the second fixing pipe 6, through the thread cooperation between the pipe plug 7 and the second fixing pipe 6, the connection effect of the pipe plug 7 and the second fixing pipe 6 is better, the falling of the pipe plug 7 can be reduced, and the plugging effect is better, of course, in order to avoid that the grout enters the thread connection place when the pipe plug 7 is connected with the second fixing pipe 6, the bottom end of the second fixing pipe 6 can be temporarily plugged by a stick or a paper towel first, and then the pipe plug 7 is screwed on the bottom end of the second fixing pipe 6, of course, the pipe plug 7 can also be a rubber plug which directly plugs the bottom end of the second fixing pipe 6.
[0033] The two paragraphs above constitute a sealing assembly for sealing the second groove, i.e. a sealing assembly for sealing the through hole on the second pad. Of course, in some embodiments, the second fixed tube 6 can be omitted, and an annular groove for inserting the tube plug 7 is formed at the bottom of the second pad 4. The annular groove and the tube plug 7 are in threaded cooperation, and the second groove is directly plugged by the tube plug 7. Alternatively, the positioning rod between the first pad 3 and the second pad 4 can be omitted, and the second pad 4 is rotated after grouting to dislocate the first groove on the first pad 3 from the second groove and the third groove on the second pad 4, so that the second pad 4 plugs the first groove. Since the contact surface of the first pad 3 and the second pad 4 is a plane, it can be plugged.
[0034] The working principle and technical effects of the present embodiment are as follows:
[0035] When reinforcing the top of the tunnel, first, the existing method is used to punch a hole in the top of the tunnel, then the hollow rod body 1 with an anchor head is inserted into the hole in the top of the tunnel, then the hollow rod body 1 is rotated to make the anchor head expand and tightly adhere to the hole wall of the tunnel hole, then the small end of the grout stopping plug 2 is directed towards the tunnel hole, the grout stopping plug 2 is installed on the hollow rod body 1, and the grout stopping plug 2 blocks the gap between the tunnel hole and the hollow rod body 1, then the first pad plate 3 and the second pad plate 4 are sequentially sleeved on the hollow rod body 1, the nut 5 is screwed onto the hollow rod body 1, the first slot on the first pad plate 3 is aligned with the first fixed pipe 8, and the third slot on the second pad plate 4 is aligned with the first slot, then the first pad plate 3 and the second pad plate 4 are tightly adhered through the nut 5, the first pad plate 3 is tightly adhered to the tunnel wall, and the first fixed pipe 8 is located in the first slot on the first pad plate 3, then the existing method is used to inject grout into the hole in the top of the tunnel through the hollow rod body 1, during initial grouting, the grout in the tunnel hole will enter the first fixed pipe 8 through the exhaust hole 2.1 under the action of gravity, then flow into the horizontal second slot through the first slot, the grout flows horizontally in the second slot, and then flows out of the third slot, since the initial grout flows downward under the action of gravity, and the second slot is horizontal, the speed of the grout flowing out of the third slot is relatively slow, and when the tunnel hole is full of grout, the grout in the tunnel hole will be extruded outward, the first slot, the second slot, and the third slot are connected, and the first slot, the second slot, and the third slot limit the flow direction of the grout, so when the tunnel hole is full of grout, the speed of the grout flowing out of the third slot will increase rapidly, and the flow speed of the grout in the third slot facilitates the judgment of the fullness of the grout in the tunnel hole, and after being full, the second fixed pipe 6 is blocked by the pipe plug 7, thereby avoiding continuous flow of the grout out of the third slot, the tight adhesion of the first pad plate 3 and the second pad plate 4 also reduces the flow of the grout between the first pad plate 3 and the second pad plate 4, thereby reducing the flow amount of the grout in the tunnel, ensuring the fullness of the grout in the tunnel hole where the hollow rod body 1 is installed, and ensuring the compactness of the grout after solidification in the tunnel hole where the hollow rod body 1 is installed.
Claims
1. A bridge tunnel engineering anchor rod, comprising a hollow rod body (1), a grout stopper (2) is arranged on the hollow rod body (1), a base plate and a nut (5) are arranged on the grout stopper (2), and a vent hole (2.1) is arranged on the grout stopper (2), characterized in that: The gasket plate is provided with a through hole, a first fixing pipe (8) is arranged between the gasket plate and the gasket plug (2), the first fixing pipe (8) connects and communicates the exhaust hole (2.1) and the through hole, and a sealing assembly corresponding to the through hole is arranged to seal the through hole.
2. A bridge piling according to claim 1, characterised in that: The first fixing pipe (8) is fixed with the gasket plug (2), the diameter of the exhaust hole (2.1) is consistent with the inner diameter of the first fixing pipe (8), and the diameter of the through hole of the gasket plate is consistent with the outer diameter of the first fixing pipe (8).
3. A bridge-tunneling anchor rod according to claim 2, characterized in that: The through hole comprises a first groove and a second groove, the first groove and the second groove are distributed in a staggered manner, and the depths of the first groove and the second groove are respectively less than the thickness of the gasket plate. The first groove is arranged on one side of the gasket plate close to the gasket plug (2), the second groove is arranged on one side of the gasket plate away from the gasket plug (2), the first groove and the second groove are connected and communicated through a third groove arranged horizontally, and the sealing assembly seals the second groove.
4. A bridge-tunneling anchor rod according to claim 3, characterized in that: The gasket plate comprises a first gasket plate (3) and a second gasket plate (4), the first gasket plate (3) is close to the gasket plug (2), the first groove is arranged on the first gasket plate (3), and the depth of the first groove is consistent with the thickness of the first gasket plate (3). The second groove is arranged on one side of the second gasket plate (4) away from the first gasket plate (3), and the third groove is arranged on one side of the second gasket plate (4) close to the first gasket plate (3).
5. Bridge-tunneling anchor rod according to claim 4, characterized in that: The first gasket plate (3) and the second gasket plate (4) are provided with a positioning assembly for aligning the first groove with the third groove.
6. A bridge-tunneling anchor rod according to claim 5, characterized in that: The positioning assembly comprises a positioning rod fixed on the first gasket plate (3), the positioning rod is located on one side of the first gasket plate (3) close to the second gasket plate (4), and the second gasket plate (4) is provided with a positioning groove for inserting the positioning rod.
7. A bridge-tunneling anchor rod according to claim 6, characterized in that: The side wall of the first gasket plate (3) is provided with a first identification line, the side wall of the second gasket plate (4) is provided with a second identification line, and when the first identification line is aligned with the second identification line, the positioning rod is aligned with the positioning groove.
8. Bridge-tunneling anchor rod according to claim 7, characterized in that: The sealing assembly comprises a second fixing pipe (6), an outer side wall of the second fixing pipe (6) is provided with an external thread, the second groove is a circular structure, an inner side wall of the second groove is provided with an internal thread in screw thread cooperation with the external thread on the second fixing pipe (6), one end of the second fixing pipe (6) protrudes out of the second groove, and the one end of the second fixing pipe (6) protruding out of the second groove is provided with a pipe plug (7).
9. Bridge-tunneling anchor rod according to claim 8, characterized in that: The pipe plug (7) is a groove structure, the inner side wall of the pipe plug (7) is a circular structure, and the inner side wall of the pipe plug (7) is provided with an internal thread in screw thread cooperation with the external thread on the second fixing pipe (6).