Grouting guide pipe for advance support in tunnel construction
By setting up barrier blocks and sliding components in the grouting conduit, the problem of blockage caused by soil and gravel entering the conduit was solved, achieving smooth flow of cement grout and stable grouting pressure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2026-03-27
AI Technical Summary
When existing grouting pipes are inserted into holes, soil and gravel can easily fall into the pipes, causing poor flow of cement grout and increasing grouting pressure.
A grouting conduit was designed, comprising a barrier block and a sliding assembly. The barrier block is provided with a shrinkage groove and an extrusion slope at the grouting port. Through the cooperation of the slider and the rolling disc, the barrier block shrinks and expands the grouting port under the pressure of cement grout, preventing soil and gravel from entering and ensuring that the cement grout flows out smoothly.
It effectively prevents soil and gravel from entering the conduit, avoids blockage, ensures smooth flow of cement grout, and reduces grouting pressure fluctuations.
Smart Images
Figure CN224049177U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to grouting pipe technical field, specifically, relate to a grouting pipe for tunnel construction advance support. BACKGROUND
[0002] Grouting pipe refers to the cement slurry filling soil interlayer gap injection into the tunnel face, through the grouting pipe mouth of cement slurry seepage into the soil gap filling, to complete the reinforcement of soil.
[0003] But the existing grouting pipe in the hole of stretching into the face in advance, part of loose soil and gravel will fall because of the friction when stretching in, and the grouting port falls into the pipe, and the smell of falling into the pipe may form an obstacle, so that the flow of cement slurry is not smooth, resulting in the increase of grouting pressure. UTILITY MODEL CONTENT
[0004] The utility model discloses a grouting pipe for tunnel construction advance support, solve the grouting pipe when stretching into the hole, and the soil gravel and other foreign matters fall into the pipe, cause the incommode flow of cement slurry, increase grouting pressure.
[0005] The utility model discloses a grouting pipe for tunnel construction advance support, including the body, the surface of body is provided with grouting port, and one end of body is provided with conical head, and the middle both sides of grouting port are provided with shrinkage slot, and the middle of shrinkage slot is connected with the barrier block, and the bottom of barrier block is provided with extrusion inclined plane, and the top of barrier block is provided with sliding assembly, and sliding assembly slides along the top of shrinkage slot.
[0006] The utility model discloses a grouting pipe for tunnel construction advance support, including the body, the surface of body is provided with grouting port, and one end of body is provided with conical head, and the middle both sides of grouting port are provided with shrinkage slot, and the middle of shrinkage slot is connected with the barrier block, and the bottom of barrier block is provided with extrusion inclined plane, and the top of barrier block is provided with sliding assembly, and sliding assembly slides along the top of shrinkage slot.
[0007] Preferably, the grouting port further comprises a shrinkage slot and a sliding groove, the shrinkage slot is arranged on both sides of the grouting port, and the sliding groove is arranged on the middle top of the shrinkage slot.
[0008] Preferably, the barrier block is a half-disc arranged in the shrinkage slot on both sides of the middle of the grouting port.
[0009] Preferably, a gap is left between the two barrier blocks, and the shrinkage slot is a half-disc groove matched with the barrier block.
[0010] Preferably, the extrusion inclined plane is a low surface obliquely and extendingly arranged on the top of the barrier block, and the extrusion inclined plane is arranged as an arc at the opposite side of the barrier block.
[0011] Preferably, the sliding assembly comprises a sliding block and a rolling disc, the sliding block is arranged on the top of the barrier block, and the rolling disc is arranged on the top of the sliding block.
[0012] The sliding block is preferably a convex block on the top of the barrier block and is connected to one end of the sliding groove through a spring on one side of the sliding block.
[0013] The convex part of the rolling disc is connected to the top of the sliding block, and the rolling disc is attached to the top of the sliding groove.
[0014] The technical scheme of the utility model has at least the following advantages and beneficial effects:
[0015] 1. The barrier block provided in the device can block the falling soil and sand when the body extends into the hole, and the grouting can be contracted through the flow pressure, so that the grouting will not be affected, thereby avoiding the soil and sand entering the body through the grouting port, causing blockage and poor flow. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0017] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the body of the utility model.
[0018] Figure 3 It is a schematic diagram of the partial cross-sectional structure of the body of the utility model. Figure 2
[0019] Figure 4 It is a schematic diagram of the side view structure of the barrier block of the utility model.
[0020] Reference signs: 1 - body, 101 - grouting port, 1011 - contraction groove, 1012 - sliding groove, 102 - conical head, 2 - barrier block, 201 - extrusion slope, 202 - sliding block, 203 - rolling disc. DETAILED DESCRIPTION
[0021] The utility model will be described in detail below. Figures 1 to 4
[0022] A grouting guide pipe for tunnel construction advanced support, comprising a body 1, the surface of the body 1 is provided with a grouting port 101, one end of the body 1 is provided with a conical head 102, the middle of the grouting port 101 is provided with a contraction groove 1011 on both sides, the contraction groove 1011 is connected with a barrier block 2 in the middle, the bottom of the barrier block 2 is provided with an extrusion slope 201, the top of the barrier block 2 is provided with a sliding assembly, and the sliding assembly slides along the top of the contraction groove 1011.
[0023] First, a hole is opened on the working face, then the body 1 is inserted into the hole, and the conical head 102 at one end can more smoothly push away the sand to allow the body 1 to be inserted into the hole, then the cement slurry is injected into the body 1 through the grouting pump, and then the cement slurry will flow out from the several grouting ports 101 on the side wall of the body 1 due to the extrusion of pressure, penetrate into the gaps of the soil layer, and fill and solidify to reinforce the soil layer.
[0024] Further, the grouting port 101 also includes a contraction groove 1011 and a sliding groove 1012, the contraction groove 1011 is arranged on both sides of the grouting port 101, the sliding groove 1012 is arranged on the top of the middle part of the contraction groove 1011, the blocking block 2 is a half disc arranged in the contraction groove 1011 on both sides of the middle part of the grouting port 101, there is a gap between the two blocking blocks 2, and the contraction groove 1011 is a half disc-shaped groove matched with the blocking block 2, and the extrusion inclined surface 201 is a low surface arranged on the top of the blocking block 2 and extending obliquely, and the extrusion inclined surface 201 is arranged as a circular arc at the side opposite to the blocking block 2.
[0025] When the cement slurry is input into the body 1 through the grouting pump and discharged through the grouting port 101, the cement slurry will first flow out through the gap between the two blocking blocks 2, and under the condition of continuous injection of the cement slurry, the increase of pressure will extrude the two blocking blocks 2, forcing the two blocking blocks 2 to shrink into the contraction groove 1011, so that the grouting port 101 is expanded, so that the discharge amount of the cement slurry is larger and does not affect the discharge of the cement slurry, and the initial state of the blocking block 2 is that the two blocking blocks 2 are close to each other, which can block the grouting port 101 to a certain extent, so that the body 1 will not have sand and gravel falling into the body 1 through the grouting port 101 when it is inserted into the hole, causing blockage in the body 1, poor flow of the cement slurry, increased flow resistance in the conduit, and forced increase of grouting pressure.
[0026] Further, the sliding assembly includes a sliding block 202 and a rolling disc 203, the sliding block 202 is arranged on the top of the blocking block 2, and the rolling disc 203 is arranged on the top of the sliding block 202, the sliding block 202 is a protrusion on the top of the blocking block 2 matched with the sliding groove 1012, one side of the sliding block 202 is connected with one end of the sliding groove 1012 through a spring, and the protruding part of the rolling disc 203 is connected on the top of the sliding block 202, and the rolling disc 203 is attached to the top of the sliding groove 1012.
[0027] When the blocking block 2 is displaced in the contraction groove 1011, the sliding block 202 on the top of the blocking block 2 moves along the sliding groove 1012, so that the displacement of the blocking block 2 is more stable, and the rolling disc 203 on the top of the sliding block 202 can better reduce the friction between the sliding block 202 and the sliding groove 1012, so that the displacement of the blocking block 2 is smoother.
[0028] The following is the embodiment process of the utility model, first, a hole is formed on the working face, then the body 1 is inserted into the hole, and the conical head 102 at one end can more smoothly extrude the silt to enable the body 1 to be inserted into the hole, then the cement slurry is injected into the body 1 through the grouting pump, then the cement slurry will flow out from the several grouting ports 101 of the side wall of the body 1 due to the extrusion of pressure, infiltrate into the gap of the soil layer, fill and solidify to reinforce the soil layer, when the cement slurry is input into the body 1 through the grouting pump and discharged through the grouting port 101, the cement slurry will first flow out through the gap between the two blocking blocks 2, and under the condition that the cement slurry is continuously injected, the pressure increases, the two blocking blocks 2 are extruded, the two blocking blocks 2 are forced to shrink into the shrinkage groove 1011, so that the grouting port 101 is expanded, so that the discharge amount of the cement slurry is larger and does not affect the discharge of the cement slurry, and the initial state of the blocking block 2 is that the two blocking blocks 2 are close to each other, so that the grouting port 101 is blocked to a certain extent, so that the body 1 will not have silt and gravel falling into the body 1 through the grouting port 101 when inserted into the hole, causing blockage in the body 1, making the cement slurry flow not smooth, increasing the flow resistance in the conduit, forcing the grouting pressure to rise, and when the blocking block 2 is displaced in the shrinkage groove 1011, the top slider 202 is used to move along the sliding groove 1012, so that the displacement of the blocking block 2 is more stable, and the rolling disc 203 on the top of the slider 202 can better reduce the friction between the slider 202 and the sliding groove 1012, so that the displacement of the blocking block 2 is more smooth.
Claims
1. A grouting pipe for tunnel construction advanced support, comprising a body (1), the surface of the body (1) is provided with a grouting port (101), one end of the body (1) is provided with a conical head (102), characterized in that, The middle part of the grouting port (101) is provided with shrinkage grooves (1011) on both sides, the middle part of the shrinkage grooves (1011) is connected with a blocking block (2), the bottom of the blocking block (2) is provided with an extrusion inclined surface (201), the top of the blocking block (2) is provided with a sliding assembly, and the sliding assembly slides along the top of the shrinkage groove (1011).
2. The grouting pipe for tunnel construction advance support according to claim 1, characterized in that, The grouting port (101) further comprises shrinkage grooves (1011) and sliding grooves (1012), the shrinkage grooves (1011) are arranged on both sides of the grouting port (101), and the sliding grooves (1012) are arranged on the middle top of the shrinkage grooves (1011).
3. The grouting pipe for tunnel construction advance support according to claim 1, characterized in that, The blocking block (2) is a semicircular disc arranged in the shrinkage groove (1011) on both sides of the middle part of the grouting port (101).
4. The grouting pipe for advanced support in tunnel construction of claim 1, wherein, The blocking block (2) is a semicircular disc arranged in the shrinkage groove (1011) on both sides of the middle part of the grouting port (101).
5. The grouting pipe for tunnel construction advance support according to claim 1, characterized in that, The extrusion inclined surface (201) is a low surface arranged on the top of the blocking block (2) and extends obliquely, and the extrusion inclined surface (201) extends to the opposite side of the blocking block (2) and is arranged in an arc shape.
6. The grouting pipe for tunnel construction advance support according to claim 1, characterized in that, The sliding assembly comprises a sliding block (202) and a rolling disc (203), the sliding block (202) is arranged on the top of the blocking block (2), and the rolling disc (203) is arranged on the top of the sliding block (202).
7. The grouting pipe for tunnel construction advance support according to claim 6, characterized in that, The sliding block (202) is a convex block arranged on the top of the blocking block (2) and matched with the sliding groove (1012), and one side of the sliding block (202) is connected with one end of the sliding groove (1012) through a spring.
8. The grouting pipe for tunnel construction advance support according to claim 6, characterized in that, The convex part of the rolling disc (203) is connected to the top of the sliding block (202), and the rolling disc (203) is attached to the top of the sliding groove (1012).