Auxiliary device for improving soil plug effect of open pile tip of tubular pile
By installing auxiliary devices in the open-type pile tip and inside the pipe pile, the rotation of the obstruction component allows sand to enter the pile body, increasing the friction area. This solves the problem of insufficient bearing capacity caused by the soil plugging effect of pipe piles in desert areas, and improves the bearing capacity of the pile tip and the quality of pile formation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-07
- Publication Date
- 2026-04-07
AI Technical Summary
When constructing open-type pipe piles in desert areas, the soil plugging effect can lead to insufficient bearing capacity at the pile tip, affecting the quality of the building's foundation engineering.
Auxiliary devices, including a central shaft, mounting frame, fasteners, and resistance mechanism, are installed inside the open-type pile tip and pipe pile. The rotation of the resistance mechanism allows sand to enter the pile body, increasing the friction area, improving the soil plugging effect coefficient, and enhancing the bearing capacity of the pile end.
It significantly improves the overall bearing capacity of pipe piles, mitigates the soil plugging effect, enhances pile formation quality, and adapts to different construction scenarios, playing a particularly important role in desert regions.
Smart Images
Figure CN224092482U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a pipe pile auxiliary tool technical field, especially in a kind of auxiliary device for improving pipe pile open type pile tip soil plug effect. BACKGROUND
[0002] Pipe pile is a kind of pile foundation, with large bearing capacity, construction is convenient and the like, is widely used in industrial and civil construction, municipal, traffic, water conservancy, railway and other fields.The common pipe pile type has open pipe pile and closed pipe pile two, and the pile end of open pipe pile is open without closed structure, and the inside of pipe pile is communicated with the outside soil layer, and soil body can enter pipe pile to form soil plug effect when construction, influence overall bearing performance;The pile end of closed pipe pile is completely closed by pile shoe, steel plate or concrete end cap to form airtight space, and pile body integrity is high, and soil body cannot enter pipe pile.
[0003] When open pipe pile is sunk, soil body enters pipe pile through opening, and soil plug effect is significant, and the disturbance to surrounding soil layer can be reduced, but bearing capacity mainly depends on side friction, especially in soft soil, and end resistance is insufficient due to soil plug loosening, thus compared with closed pipe pile, the overall bearing performance of pipe pile is greatly reduced.With the requirement of vigorously promoting new energy in recent years, the construction of photovoltaic energy in desert area ushered in new development, but the bearing capacity of desert foundation has particularity, and when open type pile tip pipe pile is constructed in desert area, pile body will be filled with a large amount of sand to form soil plug effect, so that the bearing capacity of pile end is affected, which is not conducive to the foundation engineering of building.
[0004] Therefore, in combination with the particularity of pipe pile construction in desert area, an auxiliary device capable of improving soil plug effect is arranged to improve pile quality and pile end bearing capacity, and provide necessary guarantee for the foundation engineering of photovoltaic construction in desert area. SUMMARY
[0005] In view of the defects existing in the prior art, the utility model aims at providing a kind of auxiliary device for improving pipe pile open type pile tip soil plug effect, by setting the auxiliary device for improving soil plug effect in open type pile tip and pipe pile interior, it is convenient for sand to enter pipe pile interior from pile tip when sinking, improve the soil plug effect coefficient of pile end while strengthen the overall bearing capacity of pipe pile, to effectively solve the problems existing in the background art part.
[0006] The above technical purpose of the utility model is realized by the following technical scheme:
[0007] A kind of auxiliary device for improving pipe pile open type pile tip soil plug effect, comprising:
[0008] Center shaft;
[0009] First mounting bracket, is set to the proximal end of center shaft and is installed in the interior of open type pile tip
[0010] Fasteners, multiple in number, are used to connect the first mounting bracket to the pile end plate through each fastener;
[0011] The second mounting bracket is located at the far end of the central axis and abuts against the inner wall of the pipe pile.
[0012] The resistance mechanism is located between the first mounting bracket and the second mounting bracket and is mounted on the central shaft.
[0013] As a further preferred embodiment of the above technical solution: both the first mounting bracket and the second mounting bracket are annular structures, and the diameter of the first mounting bracket is larger than the diameter of the second mounting bracket.
[0014] Based on the above technical solution, the first mounting frame further includes a first positioning ring and a first support rod. The first positioning ring is connected to the pile end plate by fasteners, and the first support rod is located inside the first positioning ring and is movably connected to the central axis.
[0015] As a further preferred embodiment of the above technical solution: the auxiliary device also includes a buffer element, which is sleeved on the fastener and located between the first positioning ring and the pile end plate.
[0016] Based on the above technical solution, the second mounting bracket further includes a second positioning ring and a second support rod. The second positioning ring passes through the pipe pile, and the second support rod is located inside the second positioning ring and is movably connected to the central axis.
[0017] Based on the above technical solution, both the first support rod and the second support rod are in the shape of a cross.
[0018] As a further preferred embodiment of the above technical solution: the resistance mechanism includes a connecting plate and a blocking member, the connecting plate being connected to the central shaft, and the blocking member being connected to the side of the connecting plate near the second mounting bracket.
[0019] Based on the above technical solution, further, the obstruction component is a spiral fan blade, which is connected to the connecting plate, and the spiral fan blade extends from the near end to the far end of the central shaft.
[0020] Compared with the prior art, the present invention can produce the following beneficial effects:
[0021] 1. By setting a ring-shaped auxiliary structure inside the pipe pile with an open-type pile tip, during the pile driving process, the sand reaches the auxiliary device from the open-type pile tip and further enters the pile body as the obstruction rotates, increasing the friction area between the sand and the pile body, improving the soil plugging effect coefficient at the pile end, and effectively improving the soil plugging effect; when the vertical force of the sand inside the pipe pile reaches equilibrium, the sand no longer enters the pipe pile, and the sand inside the pile body and the auxiliary device together bear the load at the pile bottom, strengthening the overall bearing capacity of the pipe pile.
[0022] 2. The auxiliary device of this utility model has a simple structure and can be adapted to different pile types and pile tip sizes. It can be adapted to the optimization of the pile tip of pipe piles in different construction scenarios, and can significantly improve the quality of pile formation and the bearing capacity of the pile tip. It plays an important positive role in the construction of pipe piles in desert areas. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings required in the embodiments will be briefly introduced below.
[0024] Figure 1 This is a schematic diagram of the overall structure of an auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile according to the present invention.
[0025] Figure 2 This is a schematic diagram showing the connection relationship between the first and second mounting brackets and the central shaft of this utility model;
[0026] Figure 3 This is a schematic diagram showing the connection relationship between the first mounting bracket and the fastener of this utility model;
[0027] Figure 4 This is a schematic diagram of the resistance mechanism of this utility model;
[0028] Figure 5 This is a schematic diagram of the resistance mechanism of this utility model from another angle;
[0029] Figure 6 This is a schematic diagram of the structure of the auxiliary device of this utility model when it is installed at the tip of an open-type pipe pile;
[0030] In the figure: 1. Central shaft; 2. First mounting bracket; 21. First positioning ring; 22. First support rod; 3. Fastener; 4. Second mounting bracket; 41. Second positioning ring; 42. Second support rod; 5. Resistance mechanism; 51. Connecting plate; 52. Obstruction component; 6. Buffer component. Detailed Implementation
[0031] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments. For those skilled in the art, other embodiments can be obtained without creative effort.
[0032] In the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0033] Example 1:
[0034] Reference Figures 1-5 This utility model provides an auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile. The auxiliary device is installed inside the pipe pile and specifically includes: a central shaft 1, a first mounting bracket 2, fasteners 3, a second mounting bracket 4, and a resistance mechanism 5. The first mounting bracket 2 is located at the near end of the central shaft 1 and is installed inside the open-type pile tip. Multiple fasteners 3 are provided, and the first mounting bracket 2 is connected to the pile end plate through each fastener 3. The second mounting bracket 4 is located at the far end of the central shaft 1 and abuts against the inner wall of the pipe pile. The resistance mechanism 5 is located between the first mounting bracket 2 and the second mounting bracket 4 and is installed on the central shaft 1.
[0035] like Figure 2 As shown, both the first mounting bracket 2 and the second mounting bracket 4 are circular structures. The first mounting bracket 2 is connected to one end near the tip of the open pile. The first mounting bracket 2 is connected to the pile end plate by fastener 3, and the first mounting bracket 2 can move along the axial direction of the fastener 3. The second mounting bracket 4 is connected to the far end of the pipe pile by the central shaft 1. The diameter of the first mounting bracket 2 is larger than the diameter of the second mounting bracket 4.
[0036] In some preferred embodiments, the fastener 3 is a fastening bolt. Furthermore, to prevent damage to the first mounting frame 2 from excessive impact when the pipe pile enters the sand, a buffer 6 is also provided on the fastener 3. Figures 2-3 As shown, the buffer 6 in this embodiment is a shock-absorbing spring. The buffer 6 is sleeved on the fastener 3. After the first mounting bracket 2 is installed on the pile end plate, the buffer 6 is located between the first positioning ring 21 and the pile end plate.
[0037] Specifically, the first mounting bracket 2 includes a first positioning ring 21 and a first support rod 22, such as Figures 2-3 As shown, the first positioning ring 21 is connected to the pile end plate by fastener 3. The first support rod 22 has a "+" shaped structure. The first support rod 22 is fixedly connected inside the first positioning ring 21, and the middle part of the first support rod 22 is movably connected to the central shaft 1.
[0038] More specifically, the second mounting bracket 4 includes a second positioning ring 41 and a second support rod 42, such as Figure 2 As shown, the second positioning ring 41 is inserted into the pile body of the pipe pile and abuts against the inner wall of the pipe pile. The second support rod 42 is also a "+" shaped structure. The second support rod 42 is fixedly connected inside the second positioning ring 41, and the second support rod 42 is movably connected to the central shaft 1 through a bearing.
[0039] like Figures 4-5 As shown, the resistance mechanism 5 includes a connecting plate 51 and a blocking member 52. The connecting plate 51 is a cross-shaped plate, and the center intersection of the connecting plate 51 is fixedly connected to the central shaft 1. The diameter of the connecting plate 51 is smaller than the inner diameter of the pipe pile. The blocking member 52 is connected to the side of the connecting plate 51 near the second mounting bracket 4. The overall length of the blocking member 52 and the connecting plate 51 is 1 / 3 of the total length of the pipe pile. In this embodiment, the blocking member 52 is a spiral fan blade. The spiral fan blade is fixedly connected to one side of the connecting plate 51, and the spiral fan blade extends from the near end to the far end of the central shaft 1.
[0040] Example 2:
[0041] An auxiliary device for improving the soil plugging effect at the tip of open-type pipe piles, referring to... Figure 6 As shown, in actual application at the construction site, the piles are manufactured according to different pile types and pile tip dimensions. The operating principle is as follows:
[0042] The auxiliary device is connected to the lower end of the pipe pile and the interior of the open-type pile tip. During the pile driving process, sand enters the pile body through the open-type pile tip and the auxiliary device. When the sand reaches the position of the first mounting frame 2, it squeezes the first mounting frame 2 and moves it towards the pile end plate. The buffer 6 is compressed and acts as a buffer for the first mounting frame 2, preventing the first mounting frame 2 from being damaged by the large impact of the sand. The sand reaches the position of the connecting plate 51 through the gap of the first support rod 22, and then reaches the obstruction 52 through the gap of the connecting plate 51. Due to the squeezing force of the sand, the connecting plate 51 and the obstruction 52 are pushed together. The obstruction member 52 rotates coaxially with the central shaft 1. The sand enters the pile body from bottom to top along with the spiral structure of the obstruction member 52 until the vertical force reaches equilibrium and the sand no longer enters the pipe pile. At this time, the sand in the pile body and the auxiliary device form a whole to jointly bear the load at the bottom of the pile, which enhances the overall bearing capacity of the pipe pile. Moreover, compared with the auxiliary device that does not use this utility model, when the connecting plate 51 is a "+" shaped plate, the equivalent diameter is about 0.5 times the original diameter. Therefore, the soil plugging effect coefficient is increased to about twice the original, which significantly improves the soil plugging effect at the pile end.
[0043] It should be understood that the above detailed description of the embodiments of the present invention provided in the accompanying drawings is only for further explanation of the present invention and is not intended to limit the scope of the claimed present invention. Based on the embodiments of the present invention, any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are all within the protection scope of the present invention.
Claims
1. An auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile, characterized in that, include: Central axis (1); The first mounting bracket (2) is located near the center axis (1) and installed inside the open-type pile tip; Fasteners (3) are provided in multiple ways, and the first mounting bracket (2) is connected to the pile end plate by each fastener (3); The second mounting bracket (4) is located at the far end of the central axis (1) and abuts against the inner wall of the pipe pile. The resistance mechanism (5) is located between the first mounting bracket (2) and the second mounting bracket (4) and is mounted on the central shaft (1).
2. The auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile according to claim 1, characterized in that, Both the first mounting bracket (2) and the second mounting bracket (4) are circular ring structures, and the diameter of the first mounting bracket (2) is larger than the diameter of the second mounting bracket (4).
3. The auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile according to claim 2, characterized in that, The first mounting bracket (2) includes a first positioning ring (21) and a first support rod (22). The first positioning ring (21) is connected to the pile end plate by fasteners (3), and the first support rod (22) is located inside the first positioning ring (21) and is movably connected to the central shaft (1).
4. The auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile according to claim 3, characterized in that, It also includes a buffer (6), which is fitted on the fastener (3) and located between the first positioning ring (21) and the pile end plate.
5. An auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile according to claim 2, characterized in that, The second mounting bracket (4) includes a second positioning ring (41) and a second support rod (42). The second positioning ring (41) is inserted into the pipe pile, and the second support rod (42) is located inside the second positioning ring (41) and is movably connected to the central shaft (1).
6. The auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile according to claim 5, characterized in that, Both the first support rod (22) and the second support rod (42) have a cross-shaped structure.
7. The auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile according to claim 1, characterized in that, The resistance mechanism (5) includes a connecting plate (51) and a blocking member (52). The connecting plate (51) is connected to the central shaft (1), and the blocking member (52) is connected to the side of the connecting plate (51) near the second mounting bracket (4).
8. An auxiliary device for improving the soil plugging effect at the tip of an open-type pipe pile according to claim 7, characterized in that, The obstruction (52) is a spiral fan blade, which is connected to the connecting plate (51) and extends from the near end to the far end of the central shaft (1).