Exhaust, drainage and grout stop device with fine and dense grids
By using a venting, drainage and grout-stopping device with a fine mesh in the prestressed ducts, the problem of low grout density was solved, and air and water were effectively discharged, improving the protection effect and service life of the bridge.
Patent Information
- Application Number
- CN202520880634.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-05-07
AI Technical Summary
The existing prestressed duct grouting process suffers from low grout density and the inability to effectively remove residual air and water, which affects the protection of prestressed tendons and leads to a shortened service life of bridges.
An air venting, drainage, and grout stopping device with a fine mesh is adopted, including a sleeve and a fine mesh component. The sleeve is tightly fitted with the prestressing tendons, and the fine mesh component is used to discharge residual air and water, thereby improving the density of the grout.
It effectively improved the density of grouting, simplified the operation process, reduced construction complexity and cost, and extended the service life of bridges.
Smart Images
Figure CN223951640U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to prestressed duct grouting technical field, concretely relates to a exhaust drainage grout stopper with fine and dense grid. BACKGROUND
[0002] Prestressed duct grouting is an important process in post-tensioned prestressed bridge construction, after the prestressed tendon is stretched, high-strength, low-bled, micro-expansion high-performance slurry is pressed into the prestressed duct, which can effectively protect the prestressed tendon from corrosion, thereby greatly prolonging the service life of the bridge. The current prestressed duct grouting process still has problems such as low grouting density, residual air and water cannot be effectively discharged, and the protection of the prestressed tendon is greatly discounted. With more and more post-tensioned prestressed bridge construction projects, bridge safety problems are paid more and more attention to, in the face of the practical needs of discharging residual water and air and improving grouting density, it is urgent to develop a new grouting device that can meet the requirements of grouting density, is relatively simple, and does not affect production efficiency. SUMMARY
[0003] To solve the above problems, the utility model provides a exhaust drainage grout stopper with fine and dense grid, the utility model is through the following technical scheme to realize.
[0004] A exhaust drainage grout stopper with fine and dense grid, including sleeve and fine and dense grid piece, fine and dense grid piece sets up in one end of sleeve.
[0005] Preferably, the fine and dense grid piece is glued in the sleeve or integrally injection molded with the sleeve.
[0006] Preferably, the sleeve is a screen structure, and the sleeve and the fine and dense grid piece are an integral structure.
[0007] Preferably, the fine and dense grid piece is installed at one end of the sleeve through a cap, and the cap is provided with a drainage and exhaust hole corresponding to the position of the fine and dense grid piece.
[0008] Preferably, the thickness of the fine and dense grid piece is not more than 2mm, and the fine and dense grid pieces are stacked.
[0009] Preferably, the fine and dense grid piece is disc-shaped.
[0010] Preferably, the prestressed beam body is internally provided with prestressed ducts, the end of the prestressed beam body is provided with a grouting port, the grouting port is located above the prestressed ducts, the prestressed ducts are provided with prestressed tendons, the two ends of the prestressed ducts are sealed by anchorage devices, the prestressed tendons extend through the taper holes on the anchorage devices, the taper holes in the anchorage devices are provided with shrinkage-proof rings, sleeves are arranged outside the prestressed tendons at the highest position, and the end of the prestressed beam body is cemented with an anchor sealing at the position corresponding to the anchorage device.
[0011] Preferably, the fine mesh member is arranged in the sleeve away from the anchorage device, the side of the sleeve away from the fine mesh member is closely attached to the anchorage device, and the distance between the fine mesh member and the anchorage device is greater than the length of the prestressed tendon exposed outside the anchorage device.
[0012] Preferably, the inner diameter of the sleeve is greater than the diameter of the hole formed on the outer side of the anchorage device, and the length of the sleeve is greater than the thickness of the anchor sealing.
[0013] The beneficial effects of the utility model are as follows:
[0014] 1. When the device is used for grouting, the residual water and air in the prestressed ducts can be fully discharged, thereby effectively improving the compactness of the grouting.
[0015] 2. When the device is used for grouting, the operation is simple, the compactness of the grouting is improved, and the workload of the construction personnel is almost not increased.
[0016] 3. The device has a simple structure, is convenient to manufacture, and is low in cost, the compactness of the grouting is effectively improved, and the cost is basically not increased. DRAWINGS
[0017] In order to more clearly illustrate the technical scheme of the utility model, the following will briefly introduce the drawings needed to be used in the specific implementation manner, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.
[0018] Figure 1 The first setting mode schematic view of the fine mesh member in the utility model is shown.
[0019] Figure 2 The second setting mode schematic view of the fine mesh member in the utility model is shown.
[0020] Figure 3 The third setting mode schematic view of the fine mesh member in the utility model is shown.
[0021] Figure 4 The assembly schematic view of the prestressed tendon and the anchorage device in the utility model is shown.
[0022] Figure 5 The schematic diagram of the device in the anchorage sealing process.
[0023] The reference signs are as follows:
[0024] 1-sleeve, 2-fine mesh, 3-cap, 4-drainage and exhaust hole, 5-prestressed beam body, 6-prestressed duct, 7-jacking hole, 8-prestressed tendon, 9-anchor, 10-shrinkage ring, 11-anchorage sealing. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0026] As shown in Figures 1-5 Fig. 1 is a drainage and exhaust grouting stop device with fine mesh, which comprises a sleeve 1 and a fine mesh 2, and the fine mesh 2 is arranged at one end of the sleeve 1.
[0027] Further, the fine mesh 2 is glued in the sleeve 1 or integrally injection molded with the sleeve 1.
[0028] Further, the sleeve 1 is a screen structure, and the sleeve 1 and the fine mesh 2 are an integral structure.
[0029] Further, the fine mesh 2 is installed at one end of the sleeve 1 through a cap 3, and the cap 3 is provided with a drainage and exhaust hole 4 corresponding to the position of the fine mesh 2.
[0030] Further, the thickness of the fine mesh 2 is not more than 2mm, and the fine mesh 2 is arranged in a stacked manner.
[0031] Further, the fine mesh 2 is disc-shaped.
[0032] Further, the inside of the existing prestressed beam body 5 is provided with a prestressed duct 6, the end of the prestressed beam body 5 is provided with a jacking hole 7, the jacking hole 7 is located above the prestressed duct 6, the prestressed tendon 8 is arranged in the prestressed duct 6, the two ends of the prestressed duct 6 are sealed by the anchor 9, the prestressed tendon 8 extends out through the conical hole on the anchor 9, the shrinkage ring 10 is arranged in the conical hole on the anchor 9, the sleeve 1 is sleeved outside the highest prestressed tendon 8, and the cement of the end of the prestressed beam body 5 is poured with the anchorage sealing 11 corresponding to the position of the anchor 9.
[0033] Further, the fine mesh member 2 is arranged in the sleeve 1 away from the anchor 9, the side of the sleeve 1 away from the fine mesh member 2 is closely attached to the anchor 9, and the distance between the fine mesh member 2 and the anchor 9 is greater than the length of the prestressed tendon 8 exposed outside the anchor 9.
[0034] Further, the inner diameter of the sleeve 1 is greater than the diameter of the hole formed outside the anchor 9, and the length of the sleeve 1 is greater than the thickness of the anchor seal 11.
[0035] The use method of the device is as follows:
[0036] S1, sealing anchor process, the end of the sleeve 1 away from the fine mesh member 2 is sleeved on the uppermost prestressed tendon 8, the sleeve 1 is closely attached to the anchor 9 and covers the corresponding hole outside the anchor 9, then the relative position of the sleeve 1 and the anchor 9 is kept unchanged, and the anchor seal 11 is poured by cement.
[0037] S2, grouting process, grouting from the grouting port 7, residual air and water are discharged to the sleeve 1 through the gap between the prestressed tendon 8 at the highest position of the anchor 9 and the anchor 9 and the shrinkage ring 10, water and air are discharged, and thick slurry cannot be discharged, achieving the effect of stopping grouting, and the grouting is stopped when the slurry is discharged from the outlet, and the pressure maintaining process is started.
[0038] The end of the sleeve 1 away from the fine mesh member 2 is sleeved on the uppermost prestressed tendon 8, and the sleeve 1 is closely attached to the anchor 9. Since the inner diameter of the sleeve 1 is greater than the diameter of the hole formed outside the anchor 9, the sleeve 1 can completely cover the hole of the anchor 9. Since the distance between the fine mesh member 2 and the anchor 9 is greater than the length of the prestressed tendon 8 exposed outside the anchor 9, the prestressed tendon 8 cannot contact the fine mesh member 2.
[0039] In this application, the fine mesh member 2 is glued in the sleeve 1 or integrally injection molded with the sleeve 1, the thickness of the fine mesh member 2 is not more than 2mm, and the mesh size is not fixed. The appropriate size of the mesh can be selected according to the thick degree of the slurry, and the mesh size can be changed by the method of mesh superposition, so as to adapt to the slurry with different thick degrees. The final purpose is to prevent the slurry from overflowing while the air and water can pass through smoothly.
[0040] Then the relative position of the sleeve 1 and the anchor 9 is kept unchanged, the anchor seal 11 is poured by cement, the length of the sleeve 1 is greater than the thickness of the anchor seal 11, and the end of the sleeve 1 away from the anchor 9 is in communication with the outside air.
[0041] As shown in Figure 1 and Figure 5 , the fine mesh member 2 is disc-shaped. In order to observe whether the air is discharged, the end of the sleeve 1 away from the anchor 9 can be sealed, a soft tube is fixedly connected to the sealed end of the sleeve 1, a transparent container is arranged to contain liquid, and the head of the soft tube is inserted below the liquid level of the liquid, so as to observe the air discharge condition.
[0042] As shown in Figure 2 In this structure, the fine mesh member 2 and the sleeve 1 can be exposed outside the sealing anchor 11, and the sleeve 1 is a screen structure, so the exposed sleeve 1 and the fine mesh member 2 can discharge air and water, which can increase the air discharge area and improve the exhaust effect.
[0043] As shown in Figure 3 The fine mesh member 2 is installed at one end of the sleeve 1 through the cap 3, the cap 3 is provided with a water and air discharge hole 4 corresponding to the position of the fine mesh member 2, and air and water can be discharged through the water and air discharge hole 4.
[0044] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific implementation. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the skilled in the art can well understand and use the utility model. The utility model is limited by the claims and the entire scope and equivalents thereof.
Claims
1. A venting, drainage, and grout-stopping device with a fine mesh, characterized in that, It includes a sleeve (1) and a fine mesh element (2), the fine mesh element (2) being disposed at one end of the sleeve (1); The existing prestressed beam (5) has a prestressed duct (6) inside and a grouting port (7) at the end of the prestressed beam (5). The grouting port (7) is located above the prestressed duct (6). The prestressed duct (6) has a prestressed tendon (8). The two ends of the prestressed duct (6) are sealed by anchors (9). The prestressed tendon (8) extends out through the conical hole on the anchor (9). The conical hole on the anchor (9) has an anti-shrinkage ring (10). The sleeve (1) is fitted on the outside of the highest prestressed tendon (8). The end of the prestressed beam (5) is cemented with a sealing anchor (11) corresponding to the position of the anchor (9). The fine mesh (2) is set inside the sleeve (1) on the side away from the anchor (9). The side of the sleeve (1) away from the fine mesh (2) is closely fitted with the anchor (9). The distance between the fine mesh (2) and the anchor (9) is greater than the length of the prestressed tendon (8) exposed outside the anchor (9). The inner diameter of the sleeve (1) is greater than the diameter of the hole formed on the outside of the anchor (9), and the length of the sleeve (1) is greater than the thickness of the sealing anchor (11).
2. The venting, drainage, and grout-stopping device with a fine mesh according to claim 1, characterized in that, The fine mesh component (2) is glued into the sleeve (1) or integrally injection molded with the sleeve (1).
3. The venting, drainage, and grout-stopping device with a fine mesh according to claim 1, characterized in that, The sleeve (1) is a screen structure, and the sleeve (1) and the fine mesh (2) are an integral structure.
4. The venting, drainage, and grout-stopping device with a fine mesh according to claim 1, characterized in that, The fine mesh (2) is installed at one end of the sleeve (1) by a cap (3), and the cap (3) is provided with a drainage and venting hole (4) corresponding to the position of the fine mesh (2).
5. A venting, drainage, and grout-stopping device with a fine mesh according to any one of claims 1-4, characterized in that, The thickness of the fine mesh (2) is no more than 2 mm, and the fine mesh (2) is stacked.
6. A venting, drainage, and grout-stopping device with a fine mesh according to any one of claims 1-4, characterized in that, The fine mesh element (2) is disc-shaped.