Integrated pile tip precast pile end post-grouting device
By pre-embedding the grouting pipe in the prefabricated pile and grouting into the pile tip, the problem of loose ends of the prefabricated piles or insufficient bearing capacity is solved, the bearing capacity of the pile and the safety of the project are improved, and efficient grouting quality assurance is achieved.
Patent Information
- Application Number
- CN202421840828.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-31
AI Technical Summary
After the construction of prefabricated piles, static load detection often fails to meet the design requirements. The main reason is that the pile end is loose or the bearing capacity is insufficient, resulting in a decrease in the bearing capacity of the pile head, affecting the safety of the project.
An integrated pile tip prefabricated pile end grouting device is adopted, and grouting is poured into the pile tip through the grouting pipe pre-built in the prefabricated pile. The slurry flows into the soil around the pile end through the grouting pipe, thereby enhancing the bearing capacity of the pile end soil.
Through grouting, the bearing capacity of the soil at the end of the pile is enhanced, the overall bearing capacity of the prefabricated piles is improved, the safety of the project is ensured, and impurities are prevented from entering the grouting pipe by sealing the components to ensure grouting quality.
Smart Images
Figure CN222962042U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of precast piles, and particularly to a post-grouting device for the pile end of an integrated pile tip precast pile. Background Art
[0002] At present, in the field of civil engineering, precast piles (including pipe piles) are widely used as basic support members. However, after the construction of precast piles is completed, the static load test often fails to meet the design requirements. The reasons are various, such as the pile pressing equipment being unable to hold the load, the foundation piles floating, and the uneven distribution of the bearing layer strength.
[0003] The above-mentioned various reasons can be attributed to the loosening of the pile end or the insufficient bearing capacity of the pile end soil, resulting in a decrease in the bearing capacity of the pile head and affecting the engineering safety. Utility Model Content
[0004] In order to improve the bearing capacity of the pile tip part of the precast pile, this application provides a post-grouting device for the pile end of an integrated pile tip precast pile.
[0005] This application provides a post-grouting device for the pile end of an integrated pile tip precast pile, adopting the following technical solutions:
[0006] A post-grouting device for the pile end of an integrated pile tip precast pile includes a grouting pipe embedded in the precast pile. The grouting pipe extends along the length of the precast pile. The outlet of the grouting pipe communicates with the pile tip of the precast pile, and the inlet of the grouting pipe communicates with the pile top of the precast pile.
[0007] By adopting the above technical solution, after the construction of the precast pile is completed, slurry is injected into the grouting pipe through the grouting equipment. The slurry flows through the grouting pipe to the pile tip and is injected into the soil around the pile end through the outlet of the grouting pipe, thereby enhancing the bearing capacity of the pile end soil and improving the overall bearing capacity of the precast pile.
[0008] Optionally, the grouting pipe includes a straight pipe section and an annular pipe section connected to each other. The straight pipe section is located at the pile body of the precast pile, and the annular pipe section is located at the pile tip of the precast pile. A plurality of grouting pipe outlets communicating with the surface of the pile tip are evenly distributed on the annular pipe section.
[0009] By adopting the above technical solution, the arrangement of multiple outlets of the annular pipe section can make the slurry be injected into the soil around the pile end more evenly.
[0010] Optionally, the post-grouting device further includes a plugging component for plugging the outlet of the grouting pipe; the plugging component includes a plugging state for plugging the outlet of the grouting pipe when not grouting, and an open state when grouting.
[0011] Optionally, the plugging component includes a one-way valve connected to the outlet of the grouting pipe.
[0012] By adopting the above technical solution, the one-way valve can prevent impurities from entering the inside of the grouting pipe before grouting, ensuring the grouting quality.
[0013] Optionally, the plugging assembly includes a plugging ring. A limiting ring is fixed on the pile head of the precast pile. When the plugging ring is inserted into the pile tip and moves to abut against the limiting ring, the plugging ring plugs the outlet of the grouting pipe. The plugging assembly further includes an opening structure that drives the plugging ring to release the plugging of the outlet during grouting.
[0014] Optionally, a ring groove is formed on one side of the plugging ring close to the limiting ring, and a plurality of slurry guiding holes communicating with the ring groove are formed on one side of the plugging ring close to the pile tip of the precast pile. The number of the slurry guiding holes is the same as the number of the outlets of the grouting pipe. When the plugging ring abuts against the limiting ring, the plurality of slurry guiding holes correspond to the plurality of outlets of the grouting pipe one by one.
[0015] Optionally, a guiding inclined surface is provided on one side of the plugging ring away from the ring groove.
[0016] Optionally, the straight pipe section and the ring pipe section are of an integrally formed structure.
[0017] In summary, the present application includes at least one of the following beneficial effects:
[0018] 1. Since the present invention adopts a grouting pipe embedded in a precast pile and grouts to the pile tip through the grouting pipe, the problems of loosening at the pile end of the precast pile or insufficient bearing capacity are solved, the bearing capacity of the pile is improved, and the safety of the project is ensured.
[0019] 2. In the present invention, a plugging assembly is preferably adopted, which can effectively plug the outlet of the grouting pipe when not grouting, prevent impurities from entering the inside of the grouting pipe, and ensure the grouting quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a schematic diagram of the overall structure in an embodiment of the present application;
[0021] Figure 2 is a schematic diagram of the structure showing the grouting pipe in an embodiment of the present application;
[0022] Figure 3 is a schematic diagram of the structure showing the one-way valve in an embodiment of the present application;
[0023] Figure 4 is a schematic diagram of the structure showing another plugging assembly in an embodiment of the present application;
[0024] Figure 5 is a schematic diagram of the structure showing the grouting pipe in an embodiment of the present application;
[0025] Figure 6 is a partial cross-sectional view of the precast pile in an embodiment of the present application;
[0026] Figure 7 It is a schematic cross-sectional view showing the limit ring in the embodiments of the present application.
[0027] Explanation of the reference numerals in the drawings:
[0028] 1. Prefabricated pile; 11. Limit ring;
[0029] 2. Grouting pipe; 21. Straight pipe section; 22. Ring pipe section;
[0030] 3. Check valve;
[0031] 4. Sealing ring; 41. Ring groove; 42. Grout guiding hole;
[0032] 5. Guiding inclined plane. Detailed implementation manners
[0033] The present application will be further described in detail below with reference to the accompanying drawings.
[0034] The embodiments of the present application disclose an integrated pile tip post-grouting device for prefabricated piles. Referring to Figure 1 、 2 , the post-grouting device includes a grouting pipe 2 embedded in the prefabricated pile 1. The grouting pipe 2 extends along the length of the prefabricated pile 1. The outlet of the grouting pipe 2 communicates with the pile tip of the prefabricated pile 1, and the inlet of the grouting pipe 2 communicates with the pile top of the prefabricated pile 1.
[0035] After the construction of the prefabricated pile 1 is completed, slurry is injected into the grouting pipe 2 through a grouting device. The slurry flows through the grouting pipe 2 to the pile tip and is injected into the soil around the pile end through the outlet of the grouting pipe 2, thereby enhancing the bearing capacity of the pile end soil and improving the overall bearing capacity of the prefabricated pile 1.
[0036] Referring to Figure 2 、 3 , the grouting pipe 2 includes a straight pipe section 21 and a ring pipe section 22 that are connected to each other. The straight pipe section 21 and the ring pipe section 22 can be fixedly connected together by welding or by integral molding. The straight pipe section 21 is located at the pile body of the prefabricated pile 1, and the ring pipe section 22 is located at the pile tip of the prefabricated pile 1. A plurality of grouting pipe 2 outlets communicating with the surface of the pile tip are evenly distributed at equal intervals on the ring pipe section 22. When grouting, the slurry can be injected into the soil around the pile end more evenly, further improving the bearing capacity of the pile. In this embodiment, it is preferred that the number of grouting pipe 2 outlets is four, and the present embodiment does not limit the number of grouting pipe 2 outlets.
[0037] Referring to Figure 3, the post-grouting device further includes a plugging assembly for plugging the outlet of the grouting pipe 2. The plugging assembly has a plugging state in which the outlet of the grouting pipe 2 is plugged when grouting is not carried out; and an open state in which the outlet of the grouting pipe 2 is opened when grouting is carried out. The setting of the plugging assembly can prevent impurities from entering the interior of the grouting pipe 2 before grouting and ensure the grouting quality.
[0038] Specifically, the plugging assembly includes a check valve 3 connected to the outlet of the grouting pipe 2. The check valve 3 is in a closed state when grouting is not carried out, effectively plugging the outlet of the grouting pipe 2; when grouting, the pressure of the grout will open the check valve 3, allowing the grout to flow out smoothly.
[0039] Refer to Figure 4 , 5 , this embodiment also provides a specific structure of another plugging assembly, including a plugging ring 4. A limiting ring 11 is fixed on the pile head of the precast pile 1. The plugging ring 4 is sleeved into the pile tip from the lower end of the pile tip and moves until it abuts against the limiting ring 11. At this time, the plugging ring 4 plugs all the outlets of the grouting pipes 2.
[0040] The plugging assembly further includes an opening structure that drives the plugging ring 4 to release the plugging of the outlet during grouting. During grouting, the plugging ring 4 can be driven by the opening structure to release the plugging of the outlet, allowing the grout to flow out.
[0041] Specifically, refer to Figure 6 , 7 , a ring groove 41 is formed on one side of the plugging ring 4 close to the limiting ring 11, and a plurality of slurry guiding holes 42 communicating with the ring groove 41 are formed on one side of the plugging ring 4 close to the pile tip of the precast pile 1. The number of the slurry guiding holes 42 is the same as the number of the outlets of the grouting pipes 2. When the plugging ring 4 abuts against the limiting ring 11, a plurality of slurry guiding holes 42 are aligned with a plurality of outlets of the grouting pipes 2 one by one. At this time, the grout injected under high pressure enters the ring groove 41 through the slurry guiding holes 42 and pushes the plugging ring 4 to move in a direction away from the limiting ring 11, thereby releasing the plugging of the outlets of the grouting pipes 2.
[0042] In other embodiments, the ring groove 41 can also be cancelled, and the other end of the slurry guiding hole 42 directly extends to the side of the plugging ring 4 for abutting against the limiting ring 11. The plugging ring 4 is pushed to move in a direction away from the limiting ring 11 by the reaction force between the high-pressure grout entering the slurry guiding hole 42 and the limiting ring 11.
[0043] Refer to Figure 7 , a guiding inclined surface 5 is provided on one side of the plugging ring 4 away from the ring groove 41. The setting of the guiding inclined surface 5 can guide the plugging ring 4 to move more smoothly in a direction away from the limiting ring 11 and reduce the resistance of grouting.
[0044] In this embodiment, during the construction of the precast pile 1, the connection of multiple precast piles 1 without pile tips is required to meet the construction depth requirement of the precast pile 1. Therefore, the grouting pipe 2 embedded in the precast pile 1 without a pile tip only has a straight pipe section 21, and the two ends of the straight pipe section 21 are of different sizes, facilitating the insertion connection of the straight pipe sections 21 between adjacent precast piles 1. Of course, when inserting the connected straight pipe sections 21, the method of applying glue can be used to increase the sealing performance of the connection between adjacent straight pipe sections 21. In other embodiments, the connection between adjacent straight pipe sections 21 can also be made by other means such as adding a connecting pipe.
[0045] The implementation principle of the post-grouting device at the pile end of the integrated pile tip precast pile in the embodiment of the present application is as follows:
[0046] After the construction of the precast pile 1 is completed, slurry is injected into the grouting pipe 2 through the grouting equipment. The slurry flows through the grouting pipe 2 to the pile tip and is injected into the soil around the pile end through multiple outlets of the annular pipe section 22, thereby enhancing the bearing capacity of the pile end soil and improving the overall bearing capacity of the precast pile 1.
[0047] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. An integrated pile tip prefabricated pile end post-grouting device, characterized in that: The invention comprises a grouting pipe (2) pre-buried in a precast pile (1), the grouting pipe (2) extending along the length of the precast pile (1), the outlet of the grouting pipe (2) communicating with the pile tip of the precast pile (1), and the inlet of the grouting pipe (2) communicating with the pile top of the precast pile (1); the grouting pipe (2) comprises a straight pipe section (21) and an annular pipe section (22) connected to each other, the straight pipe section (21) being located at the pile body of the precast pile (1), the annular pipe section (22) being located at the pile tip of the precast pile (1), and a plurality of grouting pipe (2) outlets communicating with the pile tip surface are evenly distributed on the annular pipe section (22).
2. The post-grouting device for the integrated prefabricated pile tip according to claim 1 is characterized in that: The post-grouting device further comprises a blocking component for blocking the outlet of the grouting pipe (2); the blocking component comprises a blocking state for blocking the outlet of the grouting pipe (2) when no grouting is performed, and an open state during grouting.
3. The post-grouting device for the integrated prefabricated pile tip according to claim 2 is characterized in that: The plugging assembly comprises a one-way valve (3) connected to the outlet of the grouting pipe (2).
4. The post-grouting device for the integrated prefabricated pile tip according to claim 2 is characterized in that: The plugging assembly comprises a plugging ring (4), a limiting ring (11) is fixed on the pile head of the prefabricated pile (1), and when the plugging ring (4) is installed in the pile tip and moves to abut against the limiting ring (11), the plugging ring (4) blocks the outlet of the grouting pipe (2). The plugging assembly also comprises an opening structure for driving the plugging ring (4) to release the outlet blockage during grouting.
5. The post-grouting device for the integrated prefabricated pile tip according to claim 4 is characterized in that: A ring groove (41) is provided on one side of the sealing ring (4) close to the limiting ring (11), and a plurality of grouting holes (42) in communication with the ring groove (41) are provided on one side of the sealing ring (4) close to the pile tip of the precast pile (1). The number of the grouting holes (42) is the same as the number of grouting pipe (2) outlets. When the sealing ring (4) and the limiting ring (11) are in contact with each other, the plurality of grouting holes (42) correspond to the plurality of grouting pipe (2) outlets one by one.
6. The post-grouting device for the integrated prefabricated pile tip according to claim 5 is characterized by: A guide slope (5) is provided on the side of the sealing ring (4) away from the annular groove (41).
7. The post-grouting device for the integrated prefabricated pile tip according to claim 2 is characterized by: The straight pipe section (21) and the annular pipe section (22) are an integrally formed structure.