Miniature pile capable of being deeply buried to provide anchoring force

Abstract

The utility model discloses a deeply-buried micro pile for providing anchoring force, and relates to the technical field of micro piles. The device comprises a prefabricated pipe; the outer wall of the pile tip is in sliding connection with the outer wall of the prefabricated pipe; the outer wall of the steel base plate is in sliding connection with the inner wall of the pile tip; the outer wall of the anti-friction gasket is fixedly connected with the top of the steel base plate; the top of the extrusion sleeve is fixedly connected with the bottom of the steel base plate; the outer wall of the steel strand anchor rod is fixedly connected with the inner wall of the extrusion sleeve, the pile tip is arranged to be connected with the prefabricated pipe, it is ensured that the micro pile can effectively bear force transmission, meanwhile, force transmission is more stable, and when the top end of the anchor rod is subjected to pulling force, the steel strand anchor rod is not prone to falling off. Friction resistance generated between the side wall of the micro pile tip and a soil layer and soil layer pressure at the top end of the micro pile act together to form pulling resistance of the whole micro pile structure, and the purpose of improving the use strength of the micro pile is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro piles, in particular to a micro pile which is deeply buried and provides an anchoring force. Background Art

[0002] Micro piles are a type of small cast-in-place piles with a pile diameter generally within 40 cm. The characteristics of micro piles include small pile diameter, less construction materials, suitability for narrow construction areas, low vibration and noise of construction machinery, and a wide range of applications.

[0003] In the prior art, the outer shell of the micropile is mostly an integrated piece, and the pipe column of the micropile is mostly cast and fixed when connecting the internal components. When the internal components deviate during the casting process, the overall strength of the micropile will be affected. At the same time, most of the micropiles in traditional technology have pressure resistance but not pull-out resistance, which makes the micropiles easy to be pulled out. In some situations where they need to withstand pull-out forces, the connection strength of traditional micropiles is insufficient. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical solution adopted by the utility model to solve the technical problems is: a deeply buried micro pile providing anchoring force, comprising: a prefabricated pipe; a pile tip, the outer wall of the pile tip is slidably connected to the outer wall of the prefabricated pipe; a steel pad, the outer wall of the steel pad is slidably connected to the inner wall of the pile tip; an anti-friction washer, the outer wall of the anti-friction washer is fixedly connected to the top of the steel pad; an extrusion sleeve, the top of the extrusion sleeve is fixedly connected to the bottom of the steel pad; a steel strand anchor rod, the outer wall of the steel strand anchor rod is fixedly connected to the inner wall of the extrusion sleeve.

[0005] Preferably, the prefabricated tube comprises a cylinder, a movable hole is provided in the wall of the cylinder, a fixing groove is provided in the side wall of the cylinder, a positioning groove is provided on the outer wall of the bottom of the cylinder, the inner wall of the bottom of the movable hole is slidably connected to the outer wall of the anti-friction gasket, the inner wall of the anti-friction gasket is slidably connected to the outer wall of the steel strand anchor rod, and the pile tip is connected to the prefabricated tube to ensure that the micropile can effectively withstand the transfer of force while also making the transfer of force more stable.

[0006] Preferably, the pile tip includes a semi-conical block, the inner wall of the semi-conical block is fixedly connected to a lattice, the outer wall of the top of the lattice is fixedly connected to a splint, and an anti-sway device is provided below the splint, the top of the outer wall of the semi-conical block is fixedly connected to a fixing protrusion, a positioning hole is provided on the inner wall of the bottom of the semi-conical block, screws are slidably connected at both sides of the semi-conical block, nuts are threadedly connected at both ends of the screw, the outer wall of the fixing protrusion is slidably connected to the inner wall of the fixing groove, the side wall inside the semi-conical block is slidably connected to the outer wall of the cylinder, and the bottom of the cylinder contacts the top of the lattice, and the micropile is subjected to force transmission. When the top end of the anchor rod is subjected to tension, the force will be transmitted along the anchor rod to the bottom of the deeply buried micropile. At this time, the micropile is in close contact with the soil layer, thereby giving full play to the frictional resistance. The frictional resistance generated between the side wall of the pile tip of the micropile and the soil layer and the soil layer pressure at the top of the micropile work together to form the pull-out resistance of the entire micropile structure.

[0007] Preferably, the anti-sway device includes a semi-cylinder, the inner wall of the semi-cylinder is fixedly connected to a blocking plate through a connecting hole, and the connecting hole is opened in the wall of the semi-cylinder, a storage hole is opened in the wall of the blocking plate, the outer wall of the semi-cylinder is fixedly connected to the inner wall of the lattice, and the inner wall of the semi-cylinder is slidably connected to the outer wall of the extrusion sleeve. The anti-sway device makes it difficult for the extrusion sleeve in the inner wall assembly to deviate, thereby ensuring the use strength of the micropile.

[0008] The beneficial effects of the utility model are as follows:

[0009] 1. The utility model connects the pile tip with the prefabricated pipe, thereby ensuring that the micropile can effectively withstand the force transmission and makes the force transmission more stable. At the same time, it ensures that the internal components of the micropile are difficult to deflect during the assembly process.

[0010] 2. The utility model transmits force through force transmission. When the top of the anchor rod is subjected to tension, the force will be transmitted along the anchor rod to the bottom of the deeply buried micropile. At this time, the micropile is in close contact with the soil layer, so as to give full play to the frictional resistance. The frictional resistance generated between the side wall of the micropile tip and the soil layer and the soil pressure at the top of the micropile work together to form the pull-out resistance of the entire micropile structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is the front view of the utility model;

[0012] Figure 2 It is a cross-sectional view of the utility model;

[0013] Figure 3 It is a structural schematic diagram of the prefabricated pipe of the utility model;

[0014] Figure 4 It is a schematic diagram of the local structure on the pile tip of the utility model;

[0015] Figure 5 It is a structural schematic diagram of the pile tip of the utility model.

[0016] In the figure: 1. prefabricated pipe; 2. pile tip; 3. anti-friction gasket; 4. steel pad; 5. extrusion sleeve; 6. steel strand anchor rod; 11. cylinder; 12. movable hole; 13. fixing groove; 14. positioning groove; 21. semi-conical block; 22. lattice; 23. splint; 24. anti-sway device; 25. fixing protrusion; 26. positioning hole; 27. screw; 28. nut; 241. semi-cylinder; 242. connecting hole; 243. blocking plate; 244. storage hole. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0018] Example: See Figure 1 - Figure 5 The utility model provides a technical solution: a deeply buried micro pile providing anchoring force, comprising: a prefabricated pipe 1; a pile tip 2, the outer wall of the pile tip 2 is slidably connected to the outer wall of the prefabricated pipe 1; a steel pad 4, the outer wall of the steel pad 4 is slidably connected to the inner wall of the pile tip 2; an anti-friction washer 3, the outer wall of the anti-friction washer 3 is fixedly connected to the top of the steel pad 4; an extrusion sleeve 5, the top of the extrusion sleeve 5 is fixedly connected to the bottom of the steel pad 4; a steel strand anchor rod 6, the outer wall of the steel strand anchor rod 6 is fixedly connected to the inner wall of the extrusion sleeve 5.

[0019] The prefabricated pipe 1 includes a cylinder 11, a movable hole 12 is opened in the wall of the cylinder 11, a fixing groove 13 is opened in the side wall of the cylinder 11, and a positioning groove 14 is opened on the outer wall of the bottom of the cylinder 11. The inner wall of the bottom of the movable hole 12 is slidably connected to the outer wall of the anti-friction gasket 3, and the inner wall of the anti-friction gasket 3 is slidably connected to the outer wall of the steel strand anchor rod 6. The prefabricated pipe 1 and the pile tip 2 are arranged to cooperate with each other to fix the extrusion sleeve 5 and the steel strand anchor rod 6. After the staff connects and fixes the steel strand 6 and the extrusion sleeve 5, the steel pad 4 is inserted into the side of the extrusion sleeve 5 with the longer steel strand 6. After the steel strand 6 passes through the anti-friction gasket 3, the anti-friction gasket 3 is inserted into the movable hole 12. At this time, the steel strand 6 passes through the movable hole 12 of the cylinder 11.

[0020] The pile tip 2 includes a semiconical block 21, the inner wall of which is fixedly connected to a lattice 22, the outer wall of the top of the lattice 22 is fixedly connected to a clamping plate 23, an anti-sway device 24 is provided below the clamping plate 23, a fixing protrusion 25 is fixedly connected to the top of the outer wall of the semiconical block 21, a positioning hole 26 is provided on the inner wall of the bottom of the semiconical block 21, screws 27 are slidably connected to the two sides of the semiconical block 21, nuts 28 are threadedly connected to the two ends of the screw 27, and the outer wall of the fixing protrusion 25 is fixedly connected to the inner wall of the fixing groove 13. The side wall of the semi-conical block 21 is slidably connected with the outer wall of the cylinder 11, and the bottom of the cylinder 11 is in contact with the top of the lattice 22. The staff takes two pile tips 2 and inserts the steel pad 4 into the gap between the clamping plate 23 and the anti-sway device 24 until the side wall and the inner wall of the lattice 22 are completely fitted. The extrusion sleeve 5 is placed inside the anti-sway device 24, and the fixing protrusion 25 on the semi-conical block 21 enters the fixing groove 13 to fix the cylinder 11. At this time, the cylinder 11 and the lattice 22 are At this time, the two pile tips 2 form the pile head of the micropile. At this time, the friction resistance generated between the side wall of the pile tip 2 and the soil layer and the soil layer pressure at the top of the micropile work together to form friction resistance. After the micropile is pressed, the steel strand anchor rod 6 moves upward. At this time, the top of the extrusion sleeve 5 is against the bottom of the steel pad 4, and the top of the steel pad 4 is clamped. The plate 23 blocks, because the clamping plate 23 is fixed on the lattice 22, the lattice 22 is connected to the semi-conical block 21, and the semi-conical block 21 is connected to the cylinder 11 through the fixed protrusion 25, so at this time, the extrusion sleeve 5 and the steel strand anchor rod 6 are difficult to separate from the micropile, and the force will be transmitted to the micropile. Since the soil layer at the top of the micropile is dense, it can provide end pressure to the micropile well, and the close contact between the micropile and the soil layer can give full play to the friction resistance and thus form the pull-out resistance of the entire micropile structure.

[0021] The anti-sway device 24 includes a semi-cylinder 241, the inner wall of which is fixedly connected to a blocking plate 243 via a connecting hole 242, and the connecting hole 242 is opened in the wall of the semi-cylinder 241, and a receiving hole 244 is opened in the wall of the blocking plate 243. The outer wall of the semi-cylinder 241 is fixedly connected to the inner wall of the lattice 22, and the inner wall of the semi-cylinder 241 is slidingly connected to the outer wall of the extrusion sleeve 5. The assembled micro pile is buried underground and covered with soil. After the steel strand anchor rod 6 is subjected to force as the anchor rod of the micro pile, when it is subjected to downward pressure, the steel strand anchor rod 6 applies pressure to the bottom of the semi-cylinder 241 through the extrusion sleeve 5.

[0022] Working principle:

[0023] When in use, the prefabricated pipe 1 and the pile tip 2 are arranged to cooperate with each other to fix the extrusion sleeve 5 and the steel strand anchor rod 6. After the staff connects and fixes the steel strand 6 and the extrusion sleeve 5, the steel pad 4 is inserted into the side of the extrusion sleeve 5 with the longer steel strand 6. After the steel strand 6 passes through the anti-friction washer 3, the anti-friction washer 3 is inserted into the movable hole 12. At this time, the steel strand 6 passes through the movable hole 12 of the cylinder 11. The staff takes two pile tips 2 and inserts the steel pad 4 into the gap between the clamping plate 23 and the anti-sway device 24 until the side wall and the inner wall of the lattice 22 are completely fitted. The extrusion sleeve 5 is placed inside the anti-sway device 24, and the fixed The fixed protrusion 25 enters the fixing groove 13 to fix the cylinder 11. At this time, the cylinder 11 is in contact with the lattice 22. At the same time, the positioning groove 14 on the semi-conical block 21 further prevents the deflection of the cylinder 11. At this time, another pile tip 2 is installed by the same operation. At this time, the two pile tips 2 constitute the pile head of the micropile. At this time, the staff inserts the positioning pin into the positioning hole 26 to complete the fixation of the tip position of the pile tip 2. At the same time, after inserting the screw 27 on both sides of the two pile tips 2, the nuts 28 are screwed into the two ends of the screw 27 at the same time. The pile tip 2 is closed by squeezing the semi-conical block 21 by the nut 28, thereby completing the assembly of the micropile.

[0024] The assembled micro pile is buried in the ground and covered with soil. After the steel strand anchor rod 6 is subjected to force as the anchor rod of the micro pile, when subjected to downward pressure, the steel strand anchor rod 6 applies pressure to the bottom of the semi-cylinder 241 through the extrusion sleeve 5. Due to the restriction of the blocking plate 243 on the connecting hole 242, the anti-sway device 24 composed of the semi-cylinder 241 and the blocking plate 243 squeezes the lattice 22. At the same time, the receiving hole 244 prevents the bottom of the steel strand anchor rod 6 from being directly damaged. At this time, the anti-sway device 24 tends to move toward the positioning hole 26. Due to the force on the lattice 22, the semi-conical block 21 is squeezed. At this time, the friction resistance generated between the side wall of the micro pile tip 2 and the soil layer and the soil layer pressure at the top of the micro pile work together to form Frictional resistance, and after the micropile is pressed, the steel strand anchor rod 6 is driven to move upward. At this time, the top of the extrusion sleeve 5 is against the bottom of the steel pad 4, and the top of the steel pad 4 is blocked by the clamping plate 23. Since the clamping plate 23 is fixed on the lattice 22, the lattice 22 is connected to the semi-conical block 21, and the semi-conical block 21 is connected to the cylinder 11 through the fixed protrusion 25, the extrusion sleeve 5 and the steel strand anchor rod 6 are difficult to separate from the micropile at this time, and the force will also be transmitted to the micropile. Since the soil layer at the top of the micropile is dense, it can provide end pressure to the micropile well, and the close contact between the micropile and the soil layer can give full play to the frictional resistance and thus form the pull-out resistance of the entire micropile structure, so that the micropile has good tensile and compressive resistance after being fixed.

[0025] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A micro pile for deep embedment to provide anchoring force, characterized in that: include: Prefabricated pipe (1); A pile tip (2), the outer wall of the pile tip (2) being slidably connected to the outer wall of the prefabricated pipe (1); A steel backing plate (4), the outer wall of which is slidably connected to the inner wall of the pile tip (2); An anti-friction washer (3), the outer wall of which is fixedly connected to the top of the steel backing plate (4); An extrusion sleeve (5), the top of which is fixedly connected to the bottom of the steel backing plate (4); A steel strand anchor rod (6), the outer wall of which is fixedly connected to the inner wall of the extrusion sleeve (5).

2. A micro pile for providing anchoring force when deeply buried according to claim 1, characterized in that: The prefabricated pipe (1) comprises a cylinder (11), a movable hole (12) is provided in the wall of the cylinder (11), a fixing groove (13) is provided on the side wall of the cylinder (11), and a positioning groove (14) is provided on the outer wall of the bottom of the cylinder (11).

3. A micro pile for providing anchoring force when deeply buried according to claim 2, characterized in that: The inner wall of the bottom of the movable hole (12) is slidably connected to the outer wall of the anti-friction washer (3), and the inner wall of the anti-friction washer (3) is slidably connected to the outer wall of the steel strand anchor rod (6).

4. The micro pile for deeply buried and providing anchoring force according to claim 1, characterized in that: The pile tip (2) comprises a semi-conical block (21), the inner wall of the semi-conical block (21) is fixedly connected to a lattice (22), the outer wall of the top of the lattice (22) is fixedly connected to a clamping plate (23), an anti-sway device (24) is arranged below the clamping plate (23), the top of the outer wall of the semi-conical block (21) is fixedly connected to a fixing protrusion (25), the inner wall of the bottom of the semi-conical block (21) is provided with a positioning hole (26), screws (27) are slidably connected to the two sides of the semi-conical block (21), and nuts (28) are threadedly connected to the two ends of the screw (27).

5. A micro pile for providing anchoring force when deeply buried according to claim 4, characterized in that: The outer wall of the fixing protrusion (25) is slidably connected to the inner wall of the fixing groove (13), the inner side wall of the semi-conical block (21) is slidably connected to the outer wall of the cylinder (11), and the bottom of the cylinder (11) is in contact with the top of the lattice (22).

6. A micro pile for deeply buried and providing anchoring force according to claim 5, characterized in that: The anti-sway device (24) comprises a semi-cylinder (241), the inner wall of the semi-cylinder (241) is fixedly connected to a blocking plate (243) via a connecting hole (242), and the connecting hole (242) is provided in the wall of the semi-cylinder (241), a receiving hole (244) is provided in the wall of the blocking plate (243), the outer wall of the semi-cylinder (241) is fixedly connected to the inner wall of the lattice (22), and the inner wall of the semi-cylinder (241) is slidably connected to the outer wall of the extrusion sleeve (5).

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