A new type of sinking pipe rubble pile construction device
By employing a connecting mechanism and a casing mechanism in the driven stone pile construction device, the problem of the pile shoe being unable to open in saturated soft soil or severely liquefied soil layers was solved, achieving continuous and efficient construction, and improving construction quality and applicability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA COMM CONSTR GRP EAST CHINA CONSTR CO LTD
- Filing Date
- 2025-09-05
- Publication Date
- 2026-07-24
Smart Images
Figure CN224549086U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of foundation construction technology, and more specifically, to a novel driven stone pile construction device. Background Technology
[0002] Gravel piles are used for foundations of loose sand, silt, cohesive soil, plain fill, and miscellaneous fill. They primarily rely on the compaction effect of the piles and vibrations during construction to increase the density of the soil around the piles, thereby improving the bearing capacity and reducing compressibility of the foundation. Practical engineering experience both domestically and internationally has proven that the gravel pile method is highly effective in treating sandy and fill foundations and has been widely applied.
[0003] In related technologies, for example, the patent with prior art publication number CN215329829U provides a construction device for vibratory driven pipe wrapped with crushed stone piles to reinforce soft foundations, including a support mechanism, a pile pipe suspended on the support mechanism, and an openable and closable pile tip set at the bottom of the pile pipe; it has the advantages of reliable structure, good performance, easy drainage, low cost, and short construction period.
[0004] While the existing technical solutions described above have solved the problems mentioned in the background technology, the construction of driven sand and gravel piles in saturated soft soil or severely liquefied soil layers presents challenges such as a small filling coefficient of sand and gravel, including necking, pile breakage, mud inclusion, concrete segregation, hanging toe, and voids. These issues result in unsatisfactory construction quality, such as broken piles and insufficient pile density, leading to rework and wasting time and costs.
[0005] In view of this, we propose a new type of driven stone pile construction device. Utility Model Content
[0006] The purpose of this application is to provide a novel driven gravel pile construction device that can effectively solve the problem in the prior art where, when constructing driven gravel piles in saturated soft soil or severely liquefied soil layers, the external mud and water pressure is greater than the pressure of the gravel inside the pipe, causing the hinged pile shoe at the pile tip to be unable to open or not to open completely, thus preventing the gravel from descending normally to form a pile. The device achieves a simple structure, low processing and modification costs, requires fewer materials, is easy to operate, and has strong applicability. It can also be installed and disassembled quickly without a casing depending on different geological conditions.
[0007] This application provides a novel driven pipe crushed stone pile construction device, comprising an upper driven pipe and a lower driven pipe; a connecting mechanism is provided between the upper driven pipe and the lower driven pipe; a sleeve mechanism is provided outside the lower driven pipe, and the diameter of the lower driven pipe is smaller than the diameter of the upper driven pipe.
[0008] The casing mechanism includes a casing; the casing is sleeved on the outside of the lower end submerged pipe, and the inner diameter of the casing is larger than the outer diameter of the lower end submerged pipe; a first clamp is provided on the outside of the bottom of the lower end submerged pipe; a second clamp is fixedly provided on the inside of the upper end of the casing; the first clamp and the second clamp are both made of steel plates with a thickness of 1cm and a width of 6.5cm.
[0009] As an optional solution to the technical solution of this application, the connecting mechanism includes a first connecting plate; the first connecting plate is fixedly disposed at the lower end of the upper submerged tube; a second connecting plate is fixedly disposed at the upper end of the lower submerged tube; positioning holes are provided on the first connecting plate and the second connecting plate and are correspondingly disposed; a positioning pin is disposed inside the positioning hole.
[0010] As an optional solution to the technical solution of this application, the inner wall of the lower end immersed tube is uniformly provided with 3 sets of guide plates along the axial direction; each set of guide plates includes 2 steel plates symmetrically distributed at 120°; the thickness of the guide plate is 1cm; the angle between the guide plate and the inner wall of the lower end immersed tube is 30°; and the height is adapted to the length of the lower end immersed tube.
[0011] As an optional solution to the technical solution of this application, a cutting blade is fixedly provided at the bottom of the sleeve; the number of cutting blades is several and they are arranged circumferentially.
[0012] As an optional solution to the technical solution in this application, the length of the sleeve is adapted to the length of the lower sinking pipe.
[0013] As an optional solution to the technical solution in this application, the height of the cutting blade is less than the distance from the first clamp to the bottom of the lower tube.
[0014] As an optional solution to the technical solution in this application, the lower end of the immersed tube is provided with a pile shoe valve inside.
[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:
[0016] This application effectively solves the problem of the inability of the valve-type pile shoe at the pile tip to open or fully open when constructing driven sand and gravel piles in saturated soft soil or severely liquefied soil layers, due to the external mud and water pressure being greater than the sand and gravel pressure inside the pipe, thus preventing the sand and gravel from descending normally to form the pile. It achieves a simple structure, low processing and modification costs, few required materials, convenient operation, and strong applicability. It can be installed and disassembled quickly without a sleeve according to different geological conditions.
[0017] The connection mechanism approved in this application enables the rapid assembly and disassembly of the lower and upper immersed tubes, and allows for quick assembly and disassembly with or without sleeves depending on different geological conditions.
[0018] This application, through the casing mechanism, creates a 1.5m high cavity between the lower end of the casing and the casing during the ascent. This 1.5m high cavity can effectively release the pressure of water, mud, soil, etc. outside the casing on the pile shoe, thereby ensuring that the sand and gravel material of the casing can be smoothly discharged from the pile shoe, ensuring the continuity of pile formation, and effectively guaranteeing and improving the success quality of crushed stone piles. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of a novel driven stone pile construction device disclosed in a preferred embodiment of this application;
[0020] Figure 2 This is a schematic cross-sectional view of a novel driven stone pile construction device disclosed in a preferred embodiment of this application;
[0021] Figure 3 This is a schematic diagram of the casing and cutting tool structure of a novel driven stone pile construction device disclosed in a preferred embodiment of this application;
[0022] Figure 4 This is a schematic diagram of the lower end driven pipe, the first clamp, and the pile shoe flap structure of a novel driven pipe crushed stone pile construction device disclosed in a preferred embodiment of this application;
[0023] Figure 5 This is a schematic diagram of the connection mechanism of a novel driven stone pile construction device disclosed in a preferred embodiment of this application;
[0024] The following are the labels in the diagram: 1. Upper end pipe; 2. Lower end pipe; 3. Sleeve; 4. First clamp; 5. Second clamp; 6. First connecting plate; 7. Second connecting plate; 8. Positioning hole; 9. Positioning pin; 10. Guide plate; 11. Cutting blade; 12. Pile shoe flap. Detailed Implementation
[0025] The present application will be further described in detail below with reference to the accompanying drawings.
[0026] Reference Figures 1 to 5 This application discloses a novel sinking pipe crushed stone pile construction device, which includes an upper sinking pipe 1 and a lower sinking pipe 2; a connecting mechanism is provided between the upper sinking pipe 1 and the lower sinking pipe 2; a sleeve mechanism is provided outside the lower sinking pipe 2, and the diameter of the lower sinking pipe 2 is smaller than the diameter of the upper sinking pipe 1.
[0027] The casing mechanism includes a casing 3; the casing 3 is sleeved on the outside of the lower end submerged pipe 2, and the inner diameter of the casing 3 is larger than the outer diameter of the lower end submerged pipe 2; a first clamp 4 is provided on the outside of the bottom of the lower end submerged pipe 2; a second clamp 5 is fixedly provided on the inside of the upper end of the casing 3; the first clamp 4 and the second clamp 5 are both made of steel plates with a thickness of 1cm and a width of 6.5cm.
[0028] By setting up an upper sinking pipe 1, a lower sinking pipe 2, a connecting mechanism, and a sleeve mechanism, a stepped structure is formed by the diameter difference between the upper sinking pipe 1 and the lower sinking pipe 2. The connecting mechanism ensures a stable connection between the two. The sleeve mechanism is fitted on the outside of the lower sinking pipe 2, and its inner diameter is larger than the outer diameter of the lower sinking pipe 2, leaving space for relative movement. When the device is in operation, the sleeve 3 moves down synchronously with the lower sinking pipe 2. During the lifting process, when the upper sinking pipe 1 drives the lower sinking pipe 2 to rise to a specific position, the first clamp 4 on the bottom outer side of the lower sinking pipe 2 will engage with the second clamp 5 on the upper inner side of the sleeve 3. At this time, the sleeve 3 is lifted together with the lower sinking pipe 2, forming a cavity structure, which can effectively release the pressure of water, mud, soil, etc. on the pile shoe outside the sleeve 3, thereby ensuring that the sand and gravel material of the sinking pipe can be smoothly discharged from the pile shoe, ensuring the continuity of pile formation, and effectively ensuring and improving the success quality of crushed stone piles.
[0029] Reference Figure 5 The connecting mechanism includes a first connecting plate 6; the first connecting plate 6 is fixedly disposed at the lower end of the upper submerged tube 1; a second connecting plate 7 is fixedly disposed at the upper end of the lower submerged tube 2; the first connecting plate 6 and the second connecting plate 7 are provided with positioning holes 8 and are correspondingly disposed; a positioning pin 9 is disposed inside the positioning hole 8.
[0030] By setting up a first connecting plate 6, a second connecting plate 7, a positioning hole 8, and a positioning pin 9, in use, the first connecting plate 6 is fixed to the upper sinking pipe 1, and the second connecting plate 7 is fixed to the lower sinking pipe 2. Then, through the cooperation of the positioning hole 8 and the positioning pin 9, the upper sinking pipe 1 and the lower sinking pipe 2 can be quickly fixed.
[0031] Reference Figure 2 The inner wall of the lower end submerged tube 2 is uniformly provided with three sets of guide plates 10 along the axial direction; each set of guide plates 10 includes two steel plates symmetrically distributed at 120°; the thickness of the guide plate 10 is 1cm; the angle between the guide plate 10 and the inner wall of the lower end submerged tube 2 is 30°; and the height is adapted to the length of the lower end submerged tube 2.
[0032] By setting the guide plate 10, which is inclined downwards, the guide plate 10 can guide the soil after it enters the lower end pipe 2, so that the soil is evenly distributed in the lower end pipe 2.
[0033] Reference Figure 3 A cutting blade 11 is fixedly installed at the bottom of the sleeve 3; the number of cutting blades 11 is several and arranged in a circle.
[0034] By setting cutting blades 11, several cutting blades 11 arranged around the bottom circumference of the casing 3 form an annular cutting surface by utilizing their distribution characteristics. During the downward movement of the lower end of the casing 2, the cutting blades 11 that move synchronously with the casing 3 can pre-crush or cut hard impurities in the soil layer, thereby reducing the sinking resistance of the casing 3 by dispersing stress concentration.
[0035] Reference Figure 1 The length of the sleeve 3 is matched with the length of the lower end of the submerged pipe 2.
[0036] By setting the length of the casing 3 and the length of the lower end, the length of the casing 3 matches the length of the lower end pipe 2. During the vibration drilling stage, the casing 3 can completely cover the outside of the lower end pipe 2 and move down synchronously with the lower end pipe 2, working together on the soil layer to ensure that the drilling range is consistent with the working area of the lower end pipe 2. When lifting to form a cavity, the matching lengths of the casing 3 and the lower end pipe 2 can ensure that the height of the cavity formed after the clamps are secured matches the length of the lower end pipe 2, accurately releasing the pressure of water, mud, and soil inside the casing 3 on the pile shoe, while avoiding the cavity being too large or too small due to length mismatch.
[0037] Reference Figure 2 The height of the cutting blade 11 is less than the distance from the first clamp 4 to the bottom of the lower tube 2.
[0038] By limiting the height of the cutting blade 11 to be less than the distance from the first clamp 4 to the bottom of the lower end of the tube 2, it is ensured that the cutting blade 11 and the first clamp 4 do not interfere with each other during construction.
[0039] Reference Figure 4 The lower end of the immersed tube 2 is equipped with a pile shoe flap 12.
[0040] By setting the pile shoe flap 12, the pile shoe flap 12 can form an openable and closable closed knot at the bottom of the lower end of the immersed tube 2, and can open and close the space inside the lower end of the immersed tube 2.
[0041] In summary, the novel driven pipe crushed stone pile construction device disclosed in this application utilizes the diameter difference between the upper driven pipe 1 and the lower driven pipe 2 to form a stepped structure, which, together with the connecting mechanism, achieves a stable connection between the two. The sleeve mechanism is fitted onto the outside of the lower driven pipe 2, with its inner diameter larger than the outer diameter of the lower driven pipe 2, reserving space for relative movement. When the device is in operation, the sleeve 3 descends synchronously with the lower driven pipe 2. During the lifting process, when the upper driven pipe 1 drives the lower driven pipe 2 to rise to a specific position, the first clamp 4 on the outer side of the bottom of the lower driven pipe 2 will engage with the second clamp 5 on the inner side of the upper end of the sleeve 3. Interlocking, at this time, the casing 3 is lifted together with the lower end pipe 2, forming a cavity structure, which can effectively release the pressure of water, mud, soil, etc. on the pile shoe outside the casing 3, thereby ensuring that the sand and gravel material of the pipe can be smoothly discharged from the pile shoe, ensuring the continuity of pile formation, and effectively ensuring and improving the success quality of crushed stone piles. Then, the first connecting plate 6 is fixed to the upper end pipe 1, and the second connecting plate 7 is fixed to the lower end pipe 2. Then, through the cooperation of the positioning hole 8 and the positioning pin 9, the upper end pipe 1 and the lower end pipe 2 are quickly fixed. Since the guide plate 10 is inclined downward, after the soil enters the interior of the lower end pipe 2, the guide plate 10 can... The settled soil is guided to ensure its even distribution within the lower end of the casing 2. Several cutting blades 11, arranged circumferentially at the bottom of the casing 3, form an annular cutting surface based on their distribution characteristics. As the lower end of the casing 2 descends, these cutting blades 11, moving synchronously with the casing 3, pre-crush or cut hard impurities in the soil layer. This reduces the descending resistance of the casing 3 by dispersing stress concentration. The length of the casing 3 matches the length of the lower end of the casing 2. During the vibration drilling stage, the casing 3 completely covers the outer side of the lower end of the casing 2, descending synchronously with it and acting together on the soil layer, ensuring that the drilling range aligns with the working area of the lower end of the casing 2. When the cavity is formed during the lifting process, the matching lengths of the sleeve 3 and the lower end pipe 2 ensure that the height of the cavity formed after the clamps are secured matches the length of the lower end pipe 2. This precisely releases the pressure of water, mud, and soil inside the sleeve 3 on the pile shoe, while avoiding an excessively large or small cavity due to length mismatch. By limiting the height of the cutting blade 11 to be less than the distance from the first clamp 4 to the bottom of the lower end pipe 2, it is ensured that the cutting blade 11 and the first clamp 4 do not interfere with each other during construction. Finally, the pile shoe flap 12 can form an openable and closable seal at the bottom of the lower end pipe 2, allowing the space inside the lower end pipe 2 to be opened and closed.
Claims
1. A novel construction device for driven stone piles, characterized in that, It includes an upper submerged tube (1) and a lower submerged tube (2); a connecting mechanism is provided between the upper submerged tube (1) and the lower submerged tube (2); a sleeve mechanism is provided outside the lower submerged tube (2), and the diameter of the lower submerged tube (2) is smaller than the diameter of the upper submerged tube (1); The sleeve mechanism includes a sleeve (3); the sleeve (3) is sleeved on the outside of the lower end sinking pipe (2), and the inner diameter of the sleeve (3) is larger than the outer diameter of the lower end sinking pipe (2); a first clamp (4) is provided on the outside of the bottom of the lower end sinking pipe (2); a second clamp (5) is fixedly provided on the inside of the upper end of the sleeve (3); the first clamp (4) and the second clamp (5) are both made of steel plates with a thickness of 1cm and a width of 6.5cm.
2. The novel driven stone pile construction device according to claim 1, characterized in that: The connecting mechanism includes a first connecting plate (6); the first connecting plate (6) is fixedly disposed at the lower end of the upper submerged tube (1); a second connecting plate (7) is fixedly disposed at the upper end of the lower submerged tube (2); the first connecting plate (6) and the second connecting plate (7) are provided with positioning holes (8) and are correspondingly disposed; a positioning pin (9) is disposed inside the positioning hole (8).
3. The novel driven stone pile construction device according to claim 1, characterized in that: The inner wall of the lower end submerged tube (2) is uniformly provided with 3 sets of guide plates (10) along the axial direction; each set of guide plates (10) includes 2 steel plates symmetrically distributed at 120°; the thickness of the guide plate (10) is 1cm; the angle between the guide plate (10) and the inner wall of the lower end submerged tube (2) is 30°; and the height is adapted to the length of the lower end submerged tube (2).
4. The novel driven stone pile construction device according to claim 1, characterized in that: A cutting blade (11) is fixedly provided at the bottom of the sleeve (3); the number of cutting blades (11) is several and arranged circumferentially.
5. The novel driven stone pile construction device according to claim 1, characterized in that: The length of the sleeve (3) is adapted to the length of the lower end sinker (2).
6. The novel driven stone pile construction device according to claim 4, characterized in that: The height of the cutting blade (11) is less than the distance from the first clamp (4) to the bottom of the lower sinker (2).
7. The novel driven stone pile construction device according to claim 1, characterized in that: The lower end of the submerged tube (2) is equipped with a pile shoe valve (12).