CN219411006U - Foundation strengthening structure based on prestress stiffness composite pile - Google Patents
Foundation strengthening structure based on prestress stiffness composite pile Download PDFInfo
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- CN219411006U CN219411006U CN202320422548.XU CN202320422548U CN219411006U CN 219411006 U CN219411006 U CN 219411006U CN 202320422548 U CN202320422548 U CN 202320422548U CN 219411006 U CN219411006 U CN 219411006U
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Abstract
The application relates to the technical field of foundation reinforcement, in particular to a foundation reinforcement structure based on a prestress stiffness composite pile, which comprises a high-pressure jet grouting pile formed below a building foundation and an anchor rod static pressure pile pressed in the high-pressure jet grouting pile, wherein a plurality of axial positioning pieces are axially arranged in the anchor rod static pressure pile along the self axis, and a puncture stabilizing piece is arranged at the bottom end of the anchor rod static pressure pile. The pile repairing method has the effects of reducing pile repairing difficulty of the static pressure pile of the anchor rod and improving bearing capacity of a single pile.
Description
Technical Field
The application relates to the technical field of foundation reinforcement, in particular to a foundation reinforcement structure based on a prestress stiffness composite pile.
Background
In the existing building reconstruction and reinforcement process, when the load of an upper structure is increased or the load transmission mode is changed to cause more bearing capacity difference of an original foundation, pile supplementing, underpinning and reinforcement are needed for the original foundation. The reinforcement of indoor pile supplementing is affected by clearance, large pile foundation equipment cannot enter, and anchor rod static pressure piles are adopted in the actual application process.
However, for the sandy pebble stratum, the stratum containing the flyrock and the boulder, the anchor rod static pressure pile cannot be pressed in and penetrated, so that pile repairing is difficult; meanwhile, the anchor rod static pressure pile is a friction pile, the pile diameter is smaller, the single pile bearing capacity is lower, the number of the repairing piles is more, and the engineering cost is higher.
Disclosure of Invention
In order to reduce the pile repairing difficulty of the anchor rod static pressure pile and improve the bearing capacity of a single pile, the application provides a foundation strengthening structure based on a prestress stiff composite pile.
The application provides a foundation stabilization structure based on prestressing force stiffness composite pile adopts following technical scheme:
the utility model provides a foundation stabilization structure based on prestressing force strength nature composite pile, includes the high pressure jet grouting pile of high pressure jet grouting shaping in building foundation below and impress stock static pressure stake in the high pressure jet grouting pile, be provided with a plurality of axial locating pieces along self axial in the stock static pressure stake, just the bottom of stock static pressure stake is provided with puncture steady firmware.
By adopting the technical scheme, the advantages of the high-pressure jet grouting pile and the anchor rod static pressure pile are comprehensively utilized, the difficulty of embedding the anchor rod static pressure pile into the hard stone layer is reduced by the high-pressure jet grouting pile, the rock embedding depth of the integral pile structure is ensured, the single pile bearing capacity is improved, and the side friction resistance of the integral pile to the pile Zhou Ruantu is fully exerted; the axial locating piece is embedded into the high-pressure jet grouting pile in the process that the anchor rod static pressure pile is pressed into the high-pressure jet grouting pile, so that the stability of the anchor rod static pressure pile relative to the high-pressure jet grouting pile is improved, meanwhile, the convenience of pressing the anchor rod static pressure pile into the high-pressure jet grouting pile is improved through the puncture stabilizing piece, on the one hand, the soil layer at the bottom end of the anchor rod static pressure pile is fixedly connected after the anchor rod static pressure pile is pressed into the high-pressure jet grouting pile, and the stability of the integral pile body is improved.
In a specific implementation mode, if the interference stress steel bars are arranged in the anchor rod static pressure pile in a penetrating way along the axial direction of the anchor rod static pressure pile, end blocks are fixedly connected to two ends of the pre-stress steel bars, and the end blocks are fixedly connected to the end parts of the anchor rod static pressure pile.
By adopting the technical scheme, the end blocks at the two ends of the prestressed reinforcement are stretched in advance in the pile making process, so that the structural strength of the static pressure pile of the anchor rod is improved.
In a specific embodiment, the axial positioning element is provided as a prefabricated ring, and the prefabricated ring is fixedly connected with the inner wall of the anchor rod static pressure pile in a coaxial manner.
Through adopting above-mentioned technical scheme, a plurality of prefabricated rings imbed in the high-pressure jet grouting pile and form the axial spacing effect to stock static pressure stake, improve stock static pressure stake and high-pressure jet grouting pile connection stability.
In a specific implementation mode, a plurality of connecting ribs are sequentially and fixedly connected to the circumferential direction of the inner annular wall of the prefabricated ring, the connecting ribs extend along the axial direction of the static pressure pile of the anchor rod and are fixedly connected with a plurality of prefabricated rings, and a plurality of extension anchor rods extending towards the axial center of the static pressure pile of the anchor rod are fixedly connected to the connecting ribs.
By adopting the technical scheme, the connecting structure of the anchor rod static pressure pile and the high-pressure jet grouting pile is further expanded by extending the anchor rod, and the connecting stability of the anchor rod static pressure pile and the high-pressure jet grouting pile is improved.
In a specific embodiment, the end of the extension anchor remote from the connecting bar is inclined towards the top end of the anchor hydrostatic pile.
Through adopting above-mentioned technical scheme, the extension stock of slope towards stock static pressure stake reduces the resistance that the axial pushed down to stock static pressure stake in-process at stock static pressure stake pressure high pressure jet grouting stake, forms bearing diagonal structure in the high pressure jet grouting stake simultaneously, is favorable to hindering stock static pressure stake and high pressure jet grouting stake and takes place relative displacement.
In a specific implementation, two ends of the pre-stressed steel bar extend out of the end face of the anchor rod static pressure pile, and the puncture stabilizing piece is covered at the end of the pre-stressed steel bar.
By adopting the technical scheme, the prestressed reinforcement extends out of the end part of the anchor rod static pressure pile, so that the construction personnel can conveniently connect with the pile sealing structure and the puncture stabilizing piece, and the connection stability of the packaging structure and the puncture stabilizing piece is improved.
In a specific embodiment, the puncture stabilizing device is configured as a grounding cone, and a plurality of grounding cones are uniformly distributed circumferentially around the axis of the anchor rod static pressure pile.
Through adopting above-mentioned technical scheme, ground connection awl tip is downwards, provides the puncture effect at stock static pressure stake in-process of impressing high pressure jet grouting stake, pricks into the pile bottom soil layer after the completion of impressing simultaneously, improves the stability of whole stake structure.
In a specific embodiment, a force transmission end plate is fixed at the top end of the anchor rod static pressure pile.
By adopting the technical scheme, when pile sealing is carried out after pile pressing is finished, the force transmission end plate is favorable for uniformly applying force to the pile body, and secondary pile pressing is realized, so that the aim of pre-stress pile sealing is finally achieved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the high-pressure jet grouting pile reduces the difficulty of embedding the anchor rod static pressure pile into the hard stone layer, ensures the rock embedding depth of the integral pile structure, improves the bearing capacity of a single pile, and fully exerts the side friction resistance of the integral pile to the pile Zhou Ruantu; the axial positioning piece improves the stability of the static pressure pile of the anchor rod relative to the high-pressure jet grouting pile, and the puncture stabilizing piece improves the convenience of the static pressure pile of the anchor rod for being pressed into the high-pressure jet grouting pile and improves the stability of the integral pile body;
2. the expansion anchor rod reduces the resistance of the axial direction to the downward pressing of the anchor rod static pressure pile in the process of pressing the anchor rod static pressure pile into the high-pressure jet grouting pile, and simultaneously forms an inclined support structure in the high-pressure jet grouting pile, thereby being beneficial to preventing the relative displacement of the anchor rod static pressure pile and the high-pressure jet grouting pile;
3. the prestressed reinforcement extends out of the end part of the anchor rod static pressure pile, so that the construction personnel can conveniently connect with the pile sealing structure and the puncture stabilizing piece, and the connection stability of the packaging structure and the puncture stabilizing piece is improved.
Drawings
FIG. 1 is a schematic structural diagram of a foundation stabilization structure for embodying a prestressed stiff composite pile in an embodiment of the present application.
FIG. 2 is a schematic diagram of a pre-aperture for embodying the original foundation in an embodiment of the present application.
FIG. 3 is a schematic diagram of a process for embodying high pressure jet grouting pile forming in an embodiment of the present application.
Fig. 4 is a schematic diagram of a prestressed seal pile for embodying a composite pile in an embodiment of the present application.
Fig. 5 is a schematic structural view of a static pressure pile for embodying a single anchor rod in an embodiment of the present application.
FIG. 6 is a cross-sectional view of an embodiment of the present application for embodying an axial positioning member and a ground cone.
Reference numerals indicate, 1, high-pressure jet grouting piles; 11. an inner pile; 12. an outer pile; 2. static pressure piles of the anchor rods; 21. prestress steel bars; 22. an end block; 23. a force transfer end plate; 3. an axial positioning member; 31. prefabricating a ring; 32. extending the anchor rod; 33. a connecting rib; 4. a grounding cone; 5. an original foundation; 6. a down-the-hole hammer; 61. a drilling machine; 7. high pressure jet grouting equipment; 71. a rotary jet drill; 8. sealing the pile force transmission cylinder; 9. and sealing a pile reaction frame.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
The embodiment of the application discloses a foundation stabilization structure based on a prestress stiffness composite pile.
Referring to fig. 1, a foundation reinforcement structure based on a prestress stiffness composite pile comprises a high-pressure jet grouting pile 1 and an anchor rod static pressure pile 2 pressed into the high-pressure jet grouting pile 1, wherein the anchor rod static pressure pile 2 divides the high-pressure jet grouting pile 1 into an outer pile 12 and an inner pile 11, the advantages of the high-pressure jet grouting pile 1 and the anchor rod static pressure pile 2 are comprehensively utilized, the difficulty of embedding the anchor rod static pressure pile 2 into a hard stone layer is reduced by the high-pressure jet grouting pile 1, the rock embedding depth of an integral pile structure is ensured, the bearing capacity of a single pile is improved, and the side friction resistance of the integral composite pile to a pile Zhou Ruantu is fully exerted.
Specifically, referring to fig. 1 to 4, a constructor needs to pre-position a pile hole on an original foundation 5, then drill holes are formed by adopting a drilling machine 61 and a down-the-hole hammer 6, then a high-pressure jet grouting pile 1 is formed along the hole positions by a high-pressure jet grouting device 7 and a jet grouting drill 71, an anchor rod static pressure pile 2 is implanted to form a composite pile, a pile sealing reaction frame 9 is erected on the original foundation 5, a force transmission end plate 23 is arranged at the top end of the anchor rod static pressure pile 2, a pile sealing force transmission cylinder 8 is pressed on the top surface of the force transmission end plate 23, and after load holding pile sealing, grouting and recovering are performed on the hole of the original foundation 5, and finally backfilling is performed to the height of an original terrace.
Referring to fig. 1, 5 and 6, a plurality of prestressed reinforcement 21 are arranged in the anchor rod static pile 2 in a penetrating manner along the axial direction of the anchor rod static pile, end blocks 22 are fixedly connected to two ends of the prestressed reinforcement 21, the end blocks 22 are fixedly connected with the end parts of the anchor rod static pile 2, the end blocks 22 are embedded on the end face of the anchor rod static pile 2, and meanwhile, two ends of the prestressed reinforcement 21 extend out of the corresponding end faces of the anchor rod static pile 2. The prestressed reinforcement 21 is matched with the end blocks 22 at the two ends to be stretched in advance in the pile manufacturing process, so that the structural strength of the anchor rod static pressure pile 2 is improved, and the end blocks 22 are convenient for stretching equipment to stably connect with the prestressed reinforcement 21 and stably fix at the two ends of the anchor rod static pressure pile 2.
A plurality of axial positioning pieces 3 are axially arranged in the anchor rod static pressure pile 2, and a puncture stabilizing piece is arranged at the bottom end of the anchor rod static pressure pile 2.
Specifically, referring to fig. 5 and 6, the axial positioning member 3 is set as a prefabricated ring 31, the prefabricated ring 31 is fixedly connected with the inner wall of the anchor rod static pressure pile 2 in a coaxial manner, and the plurality of prefabricated rings 31 are uniformly distributed along the axial direction of the anchor rod static pressure pile 2 at intervals. The circumference of the inner annular wall of the prefabricated ring 31 is sequentially and uniformly fixedly connected with a plurality of connecting ribs 33, and all the prefabricated rings 31 are fixedly connected into a whole along the axial direction of the anchor rod static pressure pile 2 by the plurality of connecting ribs 33.
The connecting rib 33 deviates from the extension stock 32 that the lateral wall fixedly connected with of prefabricated ring 31 a plurality of orientation anchor rod static pressure stake 2 axle center extended, and the last extension stock 32 of single connecting rib 33 is along anchor rod static pressure stake 2 axial interval evenly distributed in proper order, and the one end slope that the extension stock 32 kept away from connecting rib 33 is towards the top of anchor rod static pressure stake 2.
The axial limiting effect on the anchor rod static pressure pile 2 is formed by embedding the plurality of prefabricated rings 31 into the high-pressure jet grouting pile 1, meanwhile, the structural strength of the whole prefabricated rings 31 is enhanced by the plurality of connecting ribs 33, the connecting structure of the anchor rod static pressure pile 2 and the high-pressure jet grouting pile 1 is further expanded by the extension anchor rods 32, and the connecting stability of the anchor rod static pressure pile 2 and the high-pressure jet grouting pile 1 is improved. In addition, the obliquely arranged extension anchor rods 32 reduce the resistance of the axial direction to the downward pressing of the anchor rod static pressure pile 2 in the process that the anchor rod static pressure pile 2 is pressed into the high-pressure jet grouting pile 1, and meanwhile, an inclined support structure is formed in the high-pressure jet grouting pile 1, so that the relative displacement of the anchor rod static pressure pile 2 and the high-pressure jet grouting pile 1 is prevented.
Referring to fig. 5 and 6, the puncture stabilizing members are provided as ground cones 4, a plurality of ground cones 4 are uniformly distributed around the axial line circumference of the anchor rod static pressure pile 2, and the puncture stabilizing members are covered at the end parts of the prestressed reinforcement 21.
The prestressed reinforcement 21 stretches out the tip of stock static pressure stake 2 and conveniently supplies constructor external pile sealing structure and ground connection awl 4, improves the connection stability of packaging structure and ground connection awl 4. The tip of the grounding cone 4 is downward, a puncture is provided in the process that the anchor rod static pressure pile 2 is pressed into the high-pressure jet grouting pile 1, meanwhile, after the pressing is finished, the pile bottom soil layer is pricked, and the stability of the integral pile structure is improved.
The implementation principle of the foundation stabilization structure based on the prestress stiffness composite pile is as follows: the advantages of the high-pressure jet grouting pile 1 and the anchor rod static pressure pile 2 are comprehensively utilized, the difficulty of embedding the anchor rod static pressure pile 2 into a hard stone layer is reduced by the high-pressure jet grouting pile 1, the rock embedding depth of the integral pile structure is ensured, the bearing capacity of a single pile is improved, and the side friction resistance of the integral pile to the pile Zhou Ruantu is fully exerted;
the prefabricated ring 31, the connecting ribs 33 and the extension anchor rods 32 are embedded into the high-pressure jet grouting pile 1 in the process that the anchor rod static pressure pile 2 is pressed into the high-pressure jet grouting pile 1, so that the stability of the anchor rod static pressure pile 2 relative to the high-pressure jet grouting pile 1 is improved, meanwhile, the grounding cone 4 improves the convenience of pressing the anchor rod static pressure pile 2 into the high-pressure jet grouting pile 1 on one hand, and on the other hand, the anchor rod static pressure pile 2 is stably fixedly connected with the soil layer at the bottom end of the anchor rod static pressure pile 2 after being pressed into the high-pressure jet grouting pile 1, so that the stability of the integral pile body is improved.
The embodiments of the present utility model are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (8)
1. A foundation stabilization structure based on prestressing force stiffness composite pile, its characterized in that: including high-pressure jet grouting pile (1) of high-pressure jet grouting shaping below building foundation and impress stock static pressure stake (2) in high-pressure jet grouting pile (1), be provided with a plurality of axial locating pieces (3) along self axial in stock static pressure stake (2), just the bottom of stock static pressure stake (2) is provided with puncture steady firmware.
2. A foundation stabilization structure based on prestressed stiff composite piles according to claim 1, wherein: if intervention stress steel bars (21) are arranged in the anchor rod static pressure pile (2) in a penetrating way along the axial direction of the anchor rod static pressure pile, end blocks (22) are fixedly connected to two ends of each of the pre-stress steel bars (21), and the end blocks (22) are fixedly connected to the end parts of the anchor rod static pressure pile (2).
3. A foundation stabilization structure based on prestressed stiff composite piles according to claim 1, wherein: the axial positioning piece (3) is arranged as a prefabricated ring (31), and the prefabricated ring (31) is fixedly connected with the inner wall of the anchor rod static pressure pile (2) in a coaxial mode.
4. A foundation stabilization structure based on prestressed stiff composite piles according to claim 3, wherein: the utility model discloses a prefabricated anchor rod static pressure pile, including prefabricated ring (31), connecting rib (33) are connected with in proper order in the interior rampart circumference of prefabricated ring (31) fixedly connected with a plurality of connecting rib (33), connecting rib (33) fixedly connected with a plurality of orientation extension stock (32) that extend in stock static pressure pile (2) axle center.
5. A foundation stabilization structure based on prestressed stiff composite piles according to claim 4, wherein: one end of the extension anchor rod (32) far away from the connecting rib (33) is inclined towards the top end of the anchor rod static pressure pile (2).
6. A foundation stabilization structure based on prestressed stiff composite piles according to claim 2, wherein: the two ends of the prestressed reinforcement (21) extend out of the end face of the anchor rod static pressure pile (2), and the puncture stabilizing piece is covered at the end part of the prestressed reinforcement (21).
7. A foundation stabilization structure based on prestressed stiff composite piles according to claim 6, wherein: the puncture stabilizing pieces are arranged to be grounding cones (4), and the grounding cones (4) are uniformly distributed around the axial line circumference of the anchor rod static pressure pile (2).
8. A foundation stabilization structure based on prestressed stiff composite piles according to claim 1, wherein: and a force transmission end plate (23) is fixed at the top end of the anchor rod static pressure pile (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320422548.XU CN219411006U (en) | 2023-03-08 | 2023-03-08 | Foundation strengthening structure based on prestress stiffness composite pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320422548.XU CN219411006U (en) | 2023-03-08 | 2023-03-08 | Foundation strengthening structure based on prestress stiffness composite pile |
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| CN202320422548.XU Active CN219411006U (en) | 2023-03-08 | 2023-03-08 | Foundation strengthening structure based on prestress stiffness composite pile |
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- 2023-03-08 CN CN202320422548.XU patent/CN219411006U/en active Active
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