A prestressed pipe pile bottom floating sealing device and its use method

Abstract

The present invention relates to a prestressed pipe pile bottom floating sealing device, which includes a pile shoe and a pile body of the prestressed pipe pile, a first through hole vertically opened at the center of the embedded portion, a second through hole opened on the circumferential side wall of the embedded portion, the second through holes all being connected to the first through holes, a delivery pipe vertically arranged on the embedded portion and connected to the first through hole, a plurality of measuring holes opened on the top of the pile body, a measuring column slidably connected in the measuring hole, a scale provided on the measuring column, a first spring connected to the bottom surface of the measuring column, a movable rope connected to the bottom wall of the measuring column, one end of the movable rope being connected to the delivery pipe, when the first spring is in a natural state, the movable rope is in a taut state, and the top of the measuring column is higher than the top surface of the pile body. The present application has the effect of alleviating the problem that the tilt of the measuring rope makes the measurement data inaccurate, resulting in deviations in the calculation of the amount of cement mortar required to be injected, and the separation gap is not completely filled with cement mortar.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation construction, and in particular to a prestressed pipe pile bottom floating and sealing device and a use method thereof. Background Art

[0002] Prestressed pipe piles have been increasingly used in recent years. Their use of high-strength steel bars and concrete helps conserve materials and energy. The mechanized construction of the pile body ensures quality and minimizes material loss. However, prestressed pipe piles have poor shear and bending resistance. During construction, they are susceptible to soil extrusion, a key manifestation of which is pile buoyancy. When the pile body buoys, a large gap exists between the bottom of the pile body and the soil at the pile end, preventing the pile end from exerting its bearing capacity and resulting in an overestimation of the pile foundation's bearing capacity. When subjected to significant upper loads, excessive settlement can occur, posing a significant safety hazard.

[0003] The Chinese patent publication number discloses a floating sealing device for the bottom of a prestressed pipe pile, comprising a pile shoe and a pile body of the prestressed pipe pile. The pile body is hollow, and the pile shoe is divided into an embedded part and a pile tip part that are connected to each other. The embedded part is assembled and fixed in the bottom of the inner cavity of the pile body, while the pile tip part is conical, and the top surface of the cone is circumferentially distributed with reserved steel bars that match the bottom surface of the pile body, which are used to connect to the bottom of the pile body. The maximum diameter of the pile tip part is consistent with the outer diameter of the pipe pile; the embedded part is reserved with axial and radial channels, the axial channel vertically penetrates the embedded part, and the radial channel connects the axial channel and the outer surface of the embedded part, which is used to pour cement mortar into the potential separation gap between the pile body and the pile shoe.

[0004] Regarding the above-mentioned related technologies, the inventors believe that the following defects exist: after connecting the pile body to the reserved steel bars on the pile shoe, it is necessary to first measure the distance from the top of the pile body to the top of the embedded part. After the piling is completed, the distance from the top of the pile body to the top of the embedded part is measured again using a measuring rope. The difference between the two measurements is used to determine whether grouting is required. During the measurement process, the measuring rope tilts, making the measurement data inaccurate, resulting in deviations in the calculation of the amount of cement mortar required to be injected, causing the gap to be not completely filled with cement mortar. Summary of the Invention

[0005] In order to alleviate the problem that the measuring rope is tilted, resulting in inaccurate measurement data, deviation in the calculation of the amount of cement mortar required to be injected, and the escape gap is not completely filled with cement mortar, the present application provides a prestressed pipe pile bottom floating sealing device and its use method.

[0006] In the first aspect, the present application provides a prestressed pipe pile bottom floating and sealing device that adopts the following technical solutions:

[0007] A prestressed pipe pile bottom floating sealing device comprises a pile shoe and a pile body of the prestressed pipe pile, the pile body being hollow, the pile shoe comprising an embedded portion and a pile tip portion connected to each other, the embedded portion being assembled and fixed in the bottom of the inner cavity of the pile body, the pile tip portion being conical in shape, and a reserved steel bar circumferentially arranged on the top surface of the pile tip portion that matches the bottom surface of the pile body, a first through hole being vertically formed at the center of the embedded portion, a second through hole being formed on the side wall of the embedded portion, each of the second through holes being connected to the first through hole, a conveying pipe being vertically formed on the embedded portion and communicating with the first through hole, a plurality of measuring holes being formed at the top of the pile body, a measuring column being slidably connected in the measuring holes, a scale being provided on the measuring column, a first spring being connected to the bottom surface of the measuring column, a movable rope being connected to the bottom wall of the measuring column, one end of the movable rope being connected to the conveying pipe, and when the first spring is in a natural state, the movable rope is in a taut state, and the top end of the measuring column is higher than the top surface of the pile body.

[0008] By adopting the above technical solution, when in use, the scale reading on the measuring column is recorded when the pile body is inserted into the foundation, and the pile body moves upward due to the squeezing of the soil, so that a gap is generated between the bottom of the pile body and the top surface of the pile shoe. When the pile body moves up, the measuring column is tightened in the measuring column by the movable rope, and the measuring column moves downward relative to the pile body. Since the measuring column is limited by the measuring hole, it will not be skewed during the movement, so that the operator can accurately read the scale on the measuring column, and calculate the amount of cement mortar required to be injected by the difference between the two values, and then grouting is performed into the first through hole through the delivery pipe, and then flows into the gap through the second through hole to achieve the effect of filling the gap. Therefore, the inclination of the measuring rope is alleviated, which makes the measurement data inaccurate, resulting in deviations in the calculation of the amount of cement mortar required to be injected, resulting in the problem that the gap is not completely filled with cement mortar.

[0009] Optionally, a locking groove is provided on the side wall of the measuring hole, and an operating hole is provided on the top surface of the pile body, the operating hole is connected to the locking groove, a first rod is rotatably connected in the operating hole, one end of the first rod is rotatably set in the locking groove, and the first rod is provided with a clamping rod that can be rotated into the locking groove, a clamping groove is provided on the measuring column, the clamping rod is inserted into the clamping groove and fits with the side wall of the clamping groove, and the top surface of the measuring column is flush with the top surface of the pile body.

[0010] By adopting the above technical solution, when in use, the operator first presses down the measuring column so that the measuring column completely enters the measuring hole, and the locking groove is relatively connected to the clamping groove. The operator rotates the first rod, and the first rod drives the clamping rod to rotate and rotate into the clamping groove. The clamping rod fits with the side wall of the clamping groove. At this time, the top surface of the measuring column is flush with the top surface of the pile body, reducing the impact force on the measuring column.

[0011] Optionally, a plastic bag with two ends open is provided on the inner wall of the conveying tube, and the plastic bag is arranged along the length direction of the conveying tube. A closing member for controlling the closure of the top end of the plastic bag is provided in the conveying tube. A pushing member is provided in the conveying tube for pushing the plastic bag with the top closed toward the second through hole, and a feeding hole for grouting is provided on the pushing member.

[0012] By adopting the above technical solution, when in use, cement mortar is injected into the feed hole, and the cement mortar enters the first through hole through the delivery pipe. During the grouting process, the plastic bag can reduce the possibility of the cement mortar adhering to the wall of the delivery pipe. After the grouting is completed, the top end of the plastic bag is closed by the closing member, and then the plastic bag and the cement mortar are pressed down together by the pushing member, so that the cement mortar entering the gap can be squeezed more tightly.

[0013] Optionally, the closing member includes a rubber ring and an elastic sheet. The top side wall of the plastic bag is folded and bonded to the side wall of the plastic bag to form a accommodating space. The rubber ring is inserted into the accommodating space. The rubber ring is used to gather the top of the plastic bag toward the center of the conveying tube. Multiple elastic sheets are arranged along the circumference of the inner wall of the conveying tube. One end of the elastic sheet is inclined along the axial direction away from the conveying tube. One end of the elastic sheet presses the side wall of the plastic bag against the inner wall of the conveying tube, and the other end is connected to the pushing member.

[0014] By adopting the above technical solution, when in use, the operator first moves the pushing member upward, and the pushing member drives the multiple elastic sheets to move upward, so that the squeezing force of the elastic sheets on the plastic bag disappears. Under the contraction of the rubber band, the opening at the top of the plastic bag gathers toward the center of the conveying tube and is closed. Then the pushing member is moved downward, and the pushing member drives the multiple elastic sheets to move downward. At this time, the multiple elastic sheets are still tightly attached to the inner wall of the conveying tube. Under the action of the pushing member, the multiple elastic sheets move downward and shovel the plastic bag attached to the inner wall of the conveying tube away from the conveying tube.

[0015] Optionally, the pushing member includes a scraper tube, the scraper tube is externally threadedly connected to a limit ring, the limit tube fits against the top of the conveying tube, the scraper tube is inserted into the conveying tube and fits against the inner wall of the conveying tube, the top of the conveying tube is provided with a second annular groove, the second annular groove is arranged along the length direction of the conveying tube, an adsorption ring is slidably connected in the second annular groove, a plurality of first magnetic blocks are embedded on the inner wall of the adsorption ring, a second magnetic block corresponding to the plurality of first magnet blocks is embedded on the side wall of the scraper tube, a plurality of lifting holes are provided on the side wall of the conveying tube, the lifting holes are arranged along the length direction of the conveying tube, a mounting hole corresponding to the plurality of lifting holes is provided at the bottom of the conveying tube, the mounting hole is opened to the lifting hole, a blocking member is provided on the mounting hole, a lifting rope is provided in the second annular groove, one end of the lifting rope is inserted into the lifting hole through the mounting hole, and passes through the top of the lifting hole, and the end of the elastic sheet away from which it contacts the plastic bag is connected to the scraper tube.

[0016] By adopting the above technical solution, when in use, the operator pulls multiple lifting ropes, one end of the lifting rope passes through the lifting hole and moves upward, and the other end drives the adsorption ring to move toward the bottom wall of the second ring groove. Since the multiple first magnetic blocks and the multiple second magnetic blocks are adsorbed one by one, when the adsorption ring moves downward, the scraper tube moves downward with the adsorption ring, thereby pushing the elastic sheet.

[0017] Optionally, a shielding plate is hinged to the bottom end of the scraper tube via a torsion spring, and the shielding plate shields the outlet of the scraper tube.

[0018] By adopting the above technical solution, during grouting, the cement mortar can break through the baffle and move downward smoothly. After the grouting is completed, the scraper pipe outlet is blocked under the action of the torsion spring, reducing the possibility of the cement mortar being squeezed and sprayed upward from the scraper pipe outlet.

[0019] Optionally, a second rod is vertically connected to the top wall of the operating rod, the diameter of the second rod is smaller than the diameter of the first rod, and the top wall of the second rod is flush with the top surface of the pile body.

[0020] By adopting the above technical solution, when in use, the operator rotates the second rod to realize the rotation of the first rod, thereby reducing the possibility of the first rod being hit.

[0021] In a second aspect, the present application provides a method for using a prestressed pipe pile bottom floating sealing device, comprising the following steps:

[0022] S1: Press the measuring column downward so that the clamping groove is connected to the locking groove, and rotate the first rod so that the clamping rod is inserted into the clamping groove to carry out piling. Before driving the next prestressed pipe pile, rotate the first rod on the prestressed pipe pile that has been driven into the soil so that the measuring column extends out of the measuring hole under the action of the first spring. The operator records the scale reading on the measuring column at this time.

[0023] S2: After the piling is completed, the reading of the scale on the measuring column is recorded again, the amount of cement mortar to be injected is calculated according to the difference in the readings, and the cement mortar is injected into the delivery pipe through the scraper pipe;

[0024] S3: Pull the limiting ring upward to separate the elastic sheet from the plastic bag, seal the top opening of the plastic bag with the rubber ring, and then lower the limiting ring;

[0025] S4: Rotate the limiting ring and remove the limiting ring, pull the multiple pulling ropes, so that the adsorption ring drives the scraper tube to move downward.

[0026] By adopting the above technical solution, after pressing the measuring column so that its top surface is flush with the pile body, the first rod is rotated and the clamping rod is inserted into the clamping groove to achieve locking. After the pile is driven, the first rod is rotated again to unlock it, and the measuring column on the next pile body is locked. The above process is repeated, all piles are driven into the ground, and the distance moved down by the measuring column is recorded. The cement mortar required to be injected into each pile is calculated, which alleviates the inclination of the measuring rope during use, making the measurement data inaccurate, resulting in deviations in the calculation of the amount of cement mortar required to be injected. In addition, during grouting, the setting of the plastic bag can reduce the possibility of cement mortar adhering to the inner wall of the conveying pipe. The opening of the plastic bag is closed by a rubber ring, and the plastic bag and cement mortar are driven downward by a limit ring to achieve the effect of compacting the cement mortar.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The present application is provided with a pile shoe, a first through hole, a second through hole, a delivery pipe, a measuring column, a scale, a first spring, and a movable rope. When in use, the scale reading on the measuring column is recorded when the pile body is inserted into the foundation. When the pile body moves up, the measuring column is tightened in the measuring column by the movable rope, and the measuring column moves downward relative to the pile body. Since the measuring column is limited by the measuring hole, it will not be skewed during the movement, so that the operator can accurately read the scale on the measuring column, calculate the amount of cement mortar required to be injected by the difference between the two values, and then inject grout into the first through hole through the delivery pipe, and then flow into the gap through the second through hole to achieve the function of filling the gap. Therefore, the problem of inaccurate measurement data caused by the tilt of the measuring rope is alleviated, resulting in deviation in the calculation of the amount of cement mortar required to be injected, and the problem of incomplete filling of the gap with cement mortar is alleviated;

[0029] 2. The present application is provided with a plastic bag with openings at both ends, a closing piece and a pushing piece. When in use, cement mortar is injected into the feed port, and the cement mortar enters the first through hole through the delivery pipe. During the grouting process, the plastic bag can reduce the possibility of the cement mortar adhering to the wall of the delivery pipe. After the grouting is completed, the top end of the plastic bag is closed by closing it, and then the plastic bag and the cement mortar are pressed down together by the pushing piece, so that the cement mortar entering the gap can be squeezed more tightly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of this application.

[0031] Figure 2 It is a cross-sectional view of the pile body structure in the embodiment of the present application.

[0032] Figure 3 It is a schematic diagram of the clamping rod and locking groove structure in an embodiment of the present application.

[0033] Figure 4 Yes Figure 1 Enlarged view of part A.

[0034] Figure 5 Yes Figure 2 Magnified view of part B.

[0035] Figure 6 Yes Figure 2 Magnified view of part C.

[0036] Figure 7 Yes Figure 2 Magnified view of part D.

[0037] Explanation of the accompanying drawings: 1. Pile shoe; 2. Pile body; 3. Embedded part; 4. Pile tip; 5. First through hole; 6. Second through hole; 7. Delivery pipe; 8. Measuring hole; 9. Measuring column; 10. Scale; 11. First spring; 12. Movable rope; 13. Locking groove; 14. Operating hole; 15. First rod; 16. Second rod; 17. Snap-on rod; 18. Snap-on groove; 19. Plastic bag; 20. Feed hole; 21. Scraper tube; 22. Baffle; 23. Limiting ring; 24. Second ring groove; 25. Adsorption ring; 26. First magnetic block; 27. Second magnetic block; 28. Pulling hole; 29. ​​Mounting hole; 30. Sealing part; 31. Pulling rope; 32. Rubber ring; 33. Elastic sheet; 34. Accommodating space. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-7 This application is described in further detail.

[0039] The present application discloses a prestressed pipe pile bottom floating sealing device. Figure 1 、 Figure 2 and Figure 3 A prestressed pipe pile bottom floating sealing device includes a pile shoe 1 and a pile body 2 of the prestressed pipe pile. The pile body 2 is hollow. The pile shoe 1 includes an embedded part 3 and a pile tip 4 connected to each other. The embedded part 3 is assembled and fixed in the bottom of the inner cavity of the pile body 2. The pile tip 4 is conical, and the top surface of the pile tip 4 is circumferentially distributed with reserved steel bars (not shown in the figure) that match the bottom surface of the pile body 2.

[0040] Reference Figure 2 、 Figure 4 and Figure 5 A first through hole 5 is vertically opened at the center of the embedded part 3, and a second through hole 6 is opened on the circumferential side wall of the embedded part 3. Both ends of the second through hole 6 extend to the side wall of the embedded part 3. The second through hole 6 is connected to the first through hole 5. A delivery pipe 7 connected to the first through hole 5 is vertically connected to the embedded part 3, and the inner diameter of the delivery pipe 7 is equal to the aperture of the first through hole 5.

[0041] Reference Figure 2 、 Figure 4 and Figure 5 A plurality of measuring holes 8 are provided on the top of the pile body 2, and the plurality of measuring holes 8 are evenly distributed on the top surface of the pile body 2. A measuring column 9 is slidably connected in the measuring hole 8, and a scale 10 is provided on the measuring column 9. The scale 10 is arranged along the length direction of the measuring column 9. The bottom surface of the measuring column 9 is connected to a first spring 11, and the bottom wall of the measuring column 9 is connected to a movable rope 12. One end of the movable rope 12 is inserted into the bottom wall of the measuring hole 8 and passes through the inner wall of the pile body 2, and is inserted into the hollow of the pile body 2 and fixedly connected to the wall of the conveying pipe 7. When the first spring 11 is in a natural state, the movable rope 12 is in a taut state, and the top of the measuring column 9 is higher than the top surface of the pile body 2.

[0042] Reference Figure 2 and Figure 3 A locking groove 13 is provided on the side wall of the measuring hole 8, and an operating hole 14 is provided on the top surface of the pile body 2. The operating hole 14 is connected to the locking groove 13. A first rod 15 is rotatably connected in the operating hole 14, and a second rod 16 is vertically fixedly connected to the top surface of the first rod 15. The diameter of the second rod 16 is smaller than that of the first rod 15. The top wall of the second rod 16 is flush with the top surface of the pile body 2, so that an operating space is formed between the second rod 16 and the operating hole 14.

[0043] Reference Figure 2 and Figure 3 The bottom end of the first rod 15 is rotatably set in the locking groove 13. The first rod 15 is provided with a clamping rod 17 that can be rotated into the locking groove 13. The measuring column 9 is provided with a clamping groove 18. The clamping rod 17 is inserted into the clamping groove 18 and fits with the side wall of the clamping groove 18. The top surface of the measuring column 9 is flush with the top surface of the pile body 2.

[0044] Reference Figure 2 、 Figure 5 and Figure 6 A plastic bag 19 with two ends opened is provided on the inner wall of the conveying pipe 7. The plastic bag 19 can be glued to the inner wall of the conveying pipe 7 with glue. The plastic bag 19 is arranged along the length direction of the conveying pipe 7. A closing member is provided in the conveying pipe 7 for controlling the closure of the top end of the plastic bag 19. A pushing member is provided in the conveying pipe 7 for pushing the plastic bag 19 with the top closed toward the second through hole 6. The pushing member is provided with a feeding hole 20 for grouting.

[0045] Reference Figure 2 、 Figure 5 and Figure 6 The pusher includes a scraper tube 21, the bottom end of which is hinged with a shielding plate 22 via a torsion spring. The shielding plate 22 shields the outlet of the scraper tube 21. The scraper tube 21 is externally threaded with a limit ring 23. The limit ring 23 fits on the top of the delivery pipe 7 to prevent the scraper tube 21 from sliding downward during grouting. The scraper tube 21 is inserted into the delivery pipe 7 and fits against the inner wall of the delivery pipe 7. A second annular groove 24 is formed at the top of the delivery pipe 7. The second annular groove 24 is arranged along the length direction of the delivery pipe 7. An adsorption ring 25 is slidably connected in the second annular groove 24. A plurality of first magnetic blocks 26 are embedded on the inner wall of the adsorption ring 25. Second magnetic blocks 27 corresponding to the plurality of first magnetic blocks 26 are embedded on the side wall of the scraper tube 21.

[0046] Reference Figure 2 、 Figure 5 and Figure 6The side wall of the conveying tube 7 is provided with a plurality of lifting holes 28, and the lifting holes 28 are arranged along the length direction of the conveying tube 7. The bottom of the conveying tube 7 is provided with mounting holes 29 which are arranged one by one corresponding to the plurality of lifting holes 28. The mounting holes 29 are opened to the lifting holes 28, and a sealing member 30 is provided on the mounting hole 29. The sealing member 30 is a rubber plug. A lifting rope 31 is provided in the second annular groove 24, and one end of the lifting rope 31 is inserted into the lifting hole 28 through the mounting hole 29 and passes through the top of the lifting hole 28. When the operator installs the lifting rope 31, he can first pass one lifting rope 31 into the lifting hole 28, and then pass another lifting rope 31 connected with the adsorption ring 25 into the second annular groove 24. The two lifting ropes 31 can be hooked into the mounting hole 29 by using a hook to form a knot. The volume of the knot is smaller than the aperture of the lifting hole 28, and then the mounting hole 29 is sealed by the rubber plug.

[0047] Reference Figure 2 、 Figure 5 and Figure 7 The closing member includes a rubber ring 32 and an elastic sheet 33. The top side wall of the plastic bag 19 is folded away from the axis of the conveying tube 7, and the folded end is adhered to the outer wall of the plastic bag 19 to form an accommodating space 34. The rubber ring 32 is passed through the accommodating space 34. The rubber ring 32 is used to gather the top of the plastic bag 19 toward the center of the conveying tube 7. There are multiple elastic sheets 33 arranged along the circumference of the inner wall of the conveying tube 7. One end of the elastic sheet 33 is inclined along the axis away from the conveying tube 7. One end of the elastic sheet 33 presses the side wall of the top of the plastic bag 19 against the inner wall of the conveying tube 7. The end of the elastic sheet 33 away from the end that contacts the plastic bag 19 is connected to the scraper tube 21.

[0048] The implementation principle of a prestressed pipe pile bottom floating sealing device according to an embodiment of the present application is as follows: when the pile body is inserted into the foundation, the reading of the scale 10 on the measuring column 9 is recorded, and the pile body 2 is squeezed by the soil and moves upward, so that a gap is generated between the bottom of the pile body 2 and the top surface of the pile shoe 1. When the pile body 2 moves upward, the measuring column 9 is tightened in the measuring column 9 by the movable rope 12, and the measuring column 9 moves downward relative to the pile body 2. Since the measuring column 9 is limited by the measuring hole 8, it will not be skewed during the movement, so that the operator can accurately read the scale 10 on the measuring column 9, and calculate the amount of cement mortar required to be injected by the difference between the two values, and then inject grout into the first through hole 5 through the delivery pipe 7, and then flow into the gap through the second through hole 6 to achieve the effect of filling the gap.

[0049] During grouting, cement mortar is injected into the feed hole 20, and the cement mortar enters the first through hole 5 through the delivery pipe 7. During the grouting process, the plastic bag 19 can reduce the possibility of the cement mortar adhering to the wall of the delivery pipe 7. After the grouting is completed, the limit ring 23 is first pulled to move the scraper pipe 21 upward, driving the multiple elastic sheets 33 to move upward, so that the squeezing force of the elastic sheets 33 on the plastic bag 19 disappears. Under the contraction action of the rubber ring 32, the opening at the top of the plastic bag 19 gathers toward the center of the delivery pipe 7 and is closed;

[0050] Then the lifting rope 31 is pulled to move the scraper tube 21 downward, driving the multiple elastic sheets 33 to move downward. At this time, the multiple elastic sheets 33 are still tightly attached to the inner wall of the conveying tube 7. Under the action of the scraper tube 21, the multiple elastic sheets 33 move downward and shovel the plastic bag 19 connected to the inner wall of the conveying tube 7 away from the conveying tube 7. Then the plastic bag 19 is pressed down together with the cement mortar through the scraper tube 21, so that the cement mortar entering the gap can be squeezed more tightly. In summary, the present application can alleviate the problem that the measuring rope is tilted, resulting in inaccurate measurement data, resulting in deviations in the calculation of the amount of cement mortar required to be injected, and the separation gap is not completely filled with cement mortar.

[0051] This embodiment also discloses a method for using a prestressed pipe pile bottom floating and sealing device, comprising the following steps:

[0052] S1: Press the measuring column 9 downward so that the engaging groove 18 is connected to the locking groove 13, and rotate the first rod 15 so that the engaging rod 17 is inserted into the engaging groove 18 to start piling. Before driving the next prestressed pipe pile, rotate the first rod 15 on the prestressed pipe pile that has been driven into the soil so that the measuring column 9 extends out of the measuring hole 8 under the action of the first spring 11. The operator records the reading of the scale 10 on the measuring column 9 at this time.

[0053] S2: After the piling is completed, the reading of the scale 10 on the measuring column 9 is recorded again, the amount of cement mortar required to be injected is calculated based on the difference in the readings, and the cement mortar is injected into the delivery pipe 7 through the scraper pipe 21;

[0054] S3: Pull the limiting ring 23 upward to separate the elastic sheet 33 from the plastic bag 19, and the rubber ring 32 seals the top opening of the plastic bag 19 to form a stirrup, and then lower the limiting ring 23;

[0055] S4: Rotate the limiting ring 23 and remove the limiting ring 23, pull the multiple pulling ropes 31, so that the adsorption ring 25 drives the scraper tube 21 to move downward.

[0056] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A prestressed pipe pile bottom floating sealing device, comprising a pile shoe (1) and a pile body (2) of the prestressed pipe pile, wherein the pile body (2) is hollow, the pile shoe (1) comprises an embedded portion (3) and a pile tip portion (4) connected to each other, the embedded portion (3) is assembled and fixed in the bottom of the inner cavity of the pile body (2), the pile tip portion (4) is conical, and the top surface of the pile tip portion (4) is circumferentially distributed with reserved steel bars that match the bottom surface of the pile body (2), characterized in that: A first through hole (5) is vertically provided at the center of the embedded portion (3), a second through hole (6) is provided on the side wall of the embedded portion (3), and the second through holes (6) are all communicated with the first through hole (5). A delivery pipe (7) is vertically provided on the embedded portion (3) and is communicated with the first through hole (5). A plurality of measuring holes (8) are provided on the top of the pile body (2), and a measuring column (9) is slidably connected in the measuring holes (8). A scale (10) is provided on the measuring column (9). A first spring (11) is connected to the bottom surface of the measuring column (9), and a movable rope (12) is connected to the bottom wall of the measuring column (9). One end of the movable rope (12) is connected to the delivery pipe (7). The first spring (11) is in a In the natural state, the movable rope (12) is in a taut state, the top of the measuring column (9) is higher than the top surface of the pile body (2), a plastic bag (19) with two ends opened is provided on the inner wall of the delivery pipe (7), the plastic bag (19) is arranged along the length direction of the delivery pipe (7), a closing member for controlling the closure of the top of the plastic bag (19) is provided in the delivery pipe (7), a pushing member for pushing the plastic bag (19) with the top closed toward the second through hole (6) is provided in the delivery pipe (7), a feeding hole (20) for grouting is provided on the pushing member, the closing member includes a rubber ring (32) and an elastic sheet (33), the top side wall of the plastic bag (19) is folded and bonded to the plastic bag (19), and the top side wall of the plastic bag (19) is folded and bonded to the plastic bag (19). A accommodating space (34) is formed on the side wall of the bag (19), and the rubber ring (32) is inserted into the accommodating space (34). The rubber ring (32) is used to gather the top end of the plastic bag (19) toward the center of the conveying tube (7). A plurality of elastic sheets (33) are arranged along the circumference of the inner wall of the conveying tube (7). One end of the elastic sheet (33) is inclined along the axial direction away from the conveying tube (7). One end of the elastic sheet (33) presses the side wall of the plastic bag (19) against the inner wall of the conveying tube (7), and the other end is connected to the pushing member. The pushing member includes a scraper tube (21). The scraper tube (21) is externally threaded and connected to a limiting ring (23). The limiting ring (23) Fitted to the top of the conveying pipe (7), the scraper pipe (21) is inserted into the conveying pipe (7) and fits with the inner wall of the conveying pipe (7), the top of the conveying pipe (7) is provided with a second annular groove (24), the second annular groove (24) is arranged along the length direction of the conveying pipe (7), an adsorption ring (25) is slidably connected in the second annular groove (24), a plurality of first magnetic blocks (26) are embedded on the inner wall of the adsorption ring (25), a second magnetic block (27) arranged in a one-to-one correspondence with the plurality of first magnetic blocks (26) is embedded on the side wall of the scraper pipe (21), a plurality of lifting holes (28) are provided on the side wall of the conveying pipe (7), the lifting holes (28) are arranged along the length direction of the conveying pipe (7),The bottom of the conveying pipe (7) is provided with mounting holes (29) corresponding to the plurality of lifting holes (28). The mounting holes (29) are connected to the lifting holes (28). A blocking member (30) is provided on the mounting holes (29). A lifting rope (31) is provided in the second annular groove (24). One end of the lifting rope (31) is inserted into the lifting hole (28) through the mounting hole (29) and passes through the top end of the lifting hole (28). The end of the elastic sheet (33) away from the end that contacts the plastic bag (19) is connected to the scraper pipe (21).

2. The prestressed pipe pile bottom floating and sealing device according to claim 1, characterized in that: A locking groove (13) is provided on the side wall of the measuring hole (8), an operating hole (14) is provided on the top surface of the pile body (2), the operating hole (14) is communicated with the locking groove (13), a first rod (15) is rotatably connected in the operating hole (14), one end of the first rod (15) is rotatably arranged in the locking groove (13), a clamping rod (17) that can be rotated into the locking groove (13) is provided on the first rod (15), a clamping groove (18) is provided on the measuring column (9), the clamping rod (17) is inserted into the clamping groove (18) and fits with the side wall of the clamping groove (18), and the top surface of the measuring column (9) is flush with the top surface of the pile body (2).

3. The prestressed pipe pile bottom floating and sealing device according to claim 2, characterized in that: The bottom end of the scraper tube (21) is hinged with a shielding plate (22) via a torsion spring, and the shielding plate (22) shields the outlet of the scraper tube (21).

4. The prestressed pipe pile bottom floating and sealing device according to claim 3, characterized in that: A second rod (16) is vertically connected to the top wall of the first rod (15); the diameter of the second rod (16) is smaller than that of the first rod (15); and the top wall of the second rod (16) is flush with the top surface of the pile body (2).

5. A method for using the prestressed pipe pile bottom floating sealing device according to claim 4, characterized in that: The steps include: S1: Press the measuring column (9) downward so that the clamping groove (18) is connected to the locking groove (13), and rotate the first rod (15) so that the clamping rod (17) is inserted into the clamping groove (18) to carry out piling. Before driving the next prestressed pipe pile, rotate the first rod (15) on the prestressed pipe pile that has been driven into the soil so that the measuring column (9) extends out of the measuring hole (8) under the action of the first spring (11). The operator records the reading of the scale (10) on the measuring column (9) at this time. S2: After the piling is completed, the reading of the scale (10) on the measuring column (9) is recorded again, the amount of cement mortar to be injected is calculated based on the difference in readings, and the cement mortar is injected into the delivery pipe (7) through the scraper pipe (21); S3: Pull the limiting ring (23) upwards to separate the elastic sheet (33) from the plastic bag (19), and use the rubber ring (32) to seal the top opening of the plastic bag (19), and then lower the limiting ring (23); S4: Rotate the limiting ring (23) and remove the limiting ring (23), pull the plurality of pulling ropes (31), so that the adsorption ring (25) drives the scraper tube (21) to move downward.

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