A flow state solidified soil surrounding pouring test device for pile foundation scouring repair

Abstract

The utility model belongs to civil engineering technical field, proposes a kind of for pile foundation scouring repair's flow state solidified soil encircles pouring test device, including organic glass hollow column, sand tank, pit mould, mechanical rotating device, pump slurry pipe, send slurry pipe and pump slurry machine. Organic glass hollow column bottom is vertically fixed in sand tank, and its top extends to sand tank upper side;Pit mould is connected by vertical guard wall and conical platform bottom shell, and is composed of sleeve, outer arm, bearing, rotating main ring, with square rotating arm, double V-shaped clamp mouth, and the component is connected by screw. The utility model is simulated actual flow state solidified soil's pumping pouring process and designs new device, and the device meets the demand of multiple working conditions by adjusting control pouring position, pouring mode etc., explores the retention law of solidified soil under complex flow field, and it has important significance to improve the reliability and economy of solidified soil scouring repair technology.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology, specifically to a test device for surrounding pouring of fluidized solidified soil for pile foundation scour repair. Background Technology

[0002] The pile foundations of water-related projects such as cross-river and cross-sea bridges, port terminals, and offshore wind turbines are susceptible to localized scour and erosion under complex hydrodynamic conditions, leading to a series of safety problems such as reduced pile bearing capacity and structural instability. Traditional scour protection measures can be divided into active and passive measures. Active measures, such as auxiliary piles and flow-disrupting rings, aim to protect the piles by altering the flow field structure around them, but their application is limited. Passive measures, such as riprap and sandbags, achieve scour protection by enhancing the scour resistance of the pile bed. Although widely used, these measures still suffer from problems such as shear failure, edge scour failure, unstable protection effects, and high maintenance costs. In recent years, solidified soil, as a low-carbon and environmentally friendly material, has been gradually applied in the field of scour repair due to its advantages such as convenient construction and significant repair effects. In the initial stage after mixing, solidified soil has high flowability, which allows it to be pumped and filled around piles before forming solid solidified soil with a certain erosion resistance. However, during the pumping process, the fluidized solidified soil is easily affected by the complex flow field around the piles, which can lead to problems such as being dispersed and easily lost, resulting in reduced repair efficiency and material waste. Therefore, studying the retention performance of solidified soil during the pouring process will provide guidance for the engineering practice of solidified soil.

[0003] Currently, research on fluidized solidified soil erosion repair technology is still in its early stages, and there is limited development of experimental devices for circumferential pouring of fluidized solidified soil around piles. Chinese patent CN113700055A discloses a test method for simulating solidified soil erosion during offshore wind turbine pile construction. This method can simulate the pouring and solidification process of fluidized solidified soil around erosion pits in a single pile model and evaluate the erosion depth and loss rate of the solidified soil in each process. However, this method does not mention specific methods for adjusting and controlling the pouring position, pouring method, and pouring speed of the solidified soil, and it lacks consideration for research on the erosion resistance performance of the solidified soil, such as the amount retained in the initial stage after pouring. Therefore, developing a fluidized solidified soil circumferential pouring experimental device for pile foundation erosion repair, and exploring the retention law of solidified soil under complex flow fields around piles by adjusting and controlling the pouring position, pouring method, and pouring speed, is of great significance for improving the reliability and economy of solidified soil erosion repair technology. Utility Model Content

[0004] The purpose of this invention is to provide a fluidized solidified soil surrounding pouring test device for pile foundation scour repair, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A test device for circumferential casting of fluidized solidified soil for pile foundation scour repair includes a fixed column 6, a sand trough 5, a scour mold 3, a mechanical rotating device 2, a grouting pipe 1, a grouting hose 18, a grouting rigid pipe 19, and a grouting machine 4. The bottom of the fixed column 6 is vertically fixed in the sand trough 5, and the lower end is fitted with a slurry mold 3. The slurry mold 3 is used to provide a space for pouring slurry. The outer edge of the slurry mold 3 is flush with the upper surface of the sand trough 5. The mechanical rotating device 2 is set on the top of the fixed column 6, which can clamp and drive the pump pipe 1 to rotate in a circle and swing in a radial direction. The top opening of the pump pipe 1 is connected to the slurry delivery hose 18, the slurry delivery hard pipe 19 and the pump 4 in sequence, and the bottom extends to the space between the slurry mold 3 and the mechanical rotating device 2.

[0006] Furthermore, the mechanical rotating device 2 includes an outer sleeve 9, an outward extension arm 10, a bearing 11, a rotating main ring 12, a knurled screw 13, a grid-patterned rotating arm 14, and a double V-shaped clamp 15. The outer sleeve 9 is fixedly sleeved on the outside of the fixed column 6. The inner ring of the bearing 11 is fixed to the outer sleeve 9, and the outer ring is fixed to the rotating main ring 12. Knurled screws 13 are installed in the area between the outer sleeve 9 and the rotating main ring 12 where there is no bearing 11. The knurled screws 13 pass through the rotating main ring 12 from the outer radial direction. When the knurled screws 13 are tightened, their inner ends abut against the outer wall of the outer sleeve 9, thereby fixing the outer sleeve 9 to the rotating main ring 12. The rotating main ring 12 is used to evenly fix the outrigger 10 in the circumferential direction. The vertical end of the outrigger 10 is rotatably connected to the gridded rotating arm 14. The outrigger 10 and the gridded rotating arm 14 are positioned by tightening screws. The end of the gridded rotating arm 14 is provided with a double V-shaped clamp 15, which is used to clamp and press the pump slurry pipe 1.

[0007] Furthermore, the mechanical rotating device 2 also includes an inner sleeve 7 and a middle sleeve 8; the inner sleeve 7 and the middle sleeve 8 are used to adapt to fixed columns 6 of different specifications. When the shaft diameter of the fixed column 6 is small, it can be achieved by sequentially fixing the inner sleeve 7 and the middle sleeve 8 between the fixed column 6 and the outer sleeve 9 from the inside to the outside.

[0008] Furthermore, the punching mold 3 includes a vertical protective wall 16 and a frustum-shaped bottom shell 17; the vertical protective wall 16 is sleeved and fixed to the lower end of the fixing column 6, the fixing column 6 extends to the bottom of the frustum-shaped bottom shell 17, and the frustum-shaped bottom shell 17 forms a funnel-shaped space with a closed bottom; the plane of the circumferential edge of the frustum-shaped bottom shell 17 is flush with the upper surface of the sand trough 5.

[0009] Compared with existing technologies, the experimental-scale fluidized solidified soil surrounding pouring test device developed in this utility model simulates the actual pumping and pouring process of fluidized solidified soil. The entire device features a modular design, making installation convenient and quick, maintenance and repair easy, and operating at a low cost. The multi-sleeve design and crater mold design are adaptable to different pile diameters and crater sizes, and the grid-shaped rotating arm design is suitable for underwater environments, making it applicable to a wide range of scenarios. By adjusting the relative position of the pump slurry inlet and the pile column, the retention effect of fluidized solidified soil after pouring can be studied when the pump slurry inlet is at different heights in the water and at different radii from the center of the pile column. By adjusting the number of pump slurry pipes, the influence of different pouring methods, such as single-point pouring and surrounding pile column pouring, on the retention effect of fluidized solidified soil can be studied. By adjusting the pump power, the influence of the solidified soil pouring speed on the retention effect of fluidized solidified soil can be studied. This provides a device approach for exploring the retention law of solidified soil under complex flow fields and various factors, and guiding engineering practice. Attached Figure Description

[0010] Figure 1 A schematic diagram of the overall structure of a test device for the surrounding pouring of fluidized solidified soil for pile foundation scour repair. Figure 2 This is a schematic diagram of the mechanical rotating device in a test apparatus for the surrounding pouring of fluidized solidified soil used for pile foundation scour repair. Figure 3 This is a schematic diagram of the crater mold in the fluidized solidified soil surrounding pouring test device used for pile foundation scour repair, where (a) is a three-dimensional view and (b) is the front view; In the diagram: 1. Pump pipe; 2. Mechanical rotating device; 3. Drilling mold; 4. Slurry delivery pipe and pump; 5. Sand trough; 6. Fixed column; 7. Inner sleeve; 8. Middle sleeve; 9. Outer sleeve; 10. Outer arm; 11. Bearing; 12. Rotating main ring; 13. Knurled screw; 14. Rotating arm with square pattern; 15. Double V-shaped clamp; 16. Vertical protective wall; 17. Frustum-shaped bottom shell; 18. Slurry delivery hose; 19. Slurry delivery rigid pipe. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Example: Please refer to Figures 1-3A test device for circumferential casting of fluidized solidified soil for pile foundation scour repair includes a fixed column 6 (preferably a hollow plexiglass column), a sand trough 5, a scour mold 3, a mechanical rotating device 2, a grouting pipe 1, a grouting hose 18, a grouting rigid pipe 19, and a grouting machine 4. The bottom of the fixed column 6 is vertically fixed in the sand trough 5, and its top extends above the sand trough 5; the vertical protective wall 16 of the scour mold 3 is sleeved on the outside of the fixed column 6, and the plane of the outer edge of the frustum-shaped bottom shell 17 is flush with the upper surface of the sand trough 1; the mechanical rotating device 2 is fixed to the top of the fixed column 6, and it clamps and drives the grouting pipe 1 to rotate circumferentially and swing radially; the top opening of the grouting pipe 1 is connected to the grouting hose 18, the grouting rigid pipe 19, and the grouting machine 4, and its bottom extends between the scour mold 3 and the mechanical rotating device 2. The mechanical rotating device 2 includes an inner sleeve 7, a middle sleeve 8, an outer sleeve 9, an extension arm 10, a bearing 11, a rotating main ring 12, knurled screws 13, a grid-patterned rotating arm 14, and a double V-shaped clamp 15. The inner sleeve 7, middle sleeve 8, and outer sleeve 9 are sequentially fixed to the top of the fixed column 6 from the inside out, and are fixed to each other by screws. The top of the outer sleeve 9 is fixedly connected to the middle sleeve 8 by screws. The bearing 11 is sleeved on the outside of the outer sleeve 9. The outer ring of the bearing 11 is fixed to the top and bottom of the rotating main ring 12 by screws, and the inner ring of the bearing 11 is fixedly sleeved on the outer sleeve 9. The rotating main ring 12 is fixedly connected to the extension arm 10 by screws, and a knurled screw is provided in the middle of the rotating main ring 12 for easy tightening and loosening. 13. Tightening the knurled screws 13 can fix the rotating main ring 12. Loosening the knurled screws can control the rotation of the fixed rotating main ring 12, thereby controlling the fixation and rotation of the extended arm 10. The vertical end of the extended arm 10 is connected to the gridded rotating arm 14 by screws. The end of the gridded rotating arm 14 is connected to the double V-shaped clamp 15 by screws. Moving the gridded rotating arm 14 can drive the double V-shaped clamp 15 to swing radially along the fixed column 6. The double V-shaped clamp 15 is connected to the pump slurry pipe 1 by screws. The crater mold 3 includes a vertical protective wall 16 and a frustum-shaped bottom shell 17. The lower opening of the frustum-shaped bottom shell 17 is fixedly connected to the bottom of the vertical protective wall 16 to form a crater simulation structure that is easy to install and use.

[0013] Referring to the accompanying drawings, the method of using this utility model is as follows: After setting up a sand trough 5 in an empty water tank in the laboratory, install a fixing column 6, keeping the fixing column 6 perpendicular to the upper surface of the sand trough 5. Then install a slurry mold 3, keeping the horizontal plane of the outer edge of the slurry mold 3 flush with the upper surface of the sand trough 5. Then install a mechanical rotating device 2 on top of the fixing column 6. Next, install a pump pipe 1, adjust the distance from the bottom center of the pump pipe 1 to the outer surface of the fixing column 6 and to the upper surface of the sand trough 5, and lock the pump pipe 1. Finally, put the slurry delivery hose 18, the slurry delivery rigid pipe 19 and the pump 4 on top of the pump pipe 1 in sequence. When it is necessary to change the diameter of the pile foundation, remove or install sleeve 7 and sleeve 8; in the case of circumferential pouring, during the time interval between two pours, loosen the knurled screw 13, move the outrigger 10, adjust the position of the grouting pipe 1, and then tighten the knurled screw 13 to continue the next working condition pouring; when it is necessary to measure the residual fluidized solidified soil during the pouring process, remove the mechanical rotating device 2 and the crater mold 3 in sequence, and weigh the fluidized solidified soil in the crater mold 3.

[0014] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A test apparatus for circumferential casting of fluidized solidified soil for pile foundation scour repair, characterized in that, Includes fixed column (6), sand trough (5), sump mold (3), mechanical rotating device (2), slurry pump pipe (1), slurry delivery hose (18), slurry delivery rigid pipe (19), and slurry pump (4); The bottom of the fixed column (6) is vertically fixed in the sand trough (5), and the lower end is fitted with a slurry mold (3). The slurry mold (3) is used to provide a space for pouring slurry. The outer edge of the slurry mold (3) is flush with the upper surface of the sand trough (5). The mechanical rotating device (2) is set on the top of the fixed column (6) and can clamp and drive the pump pipe (1) to rotate in a circle and swing in a radial direction. The top opening of the pump pipe (1) is connected to the slurry delivery hose (18), the slurry delivery hard pipe (19) and the pump machine (4) in sequence, and the bottom extends to the space between the slurry mold (3) and the mechanical rotating device (2).

2. The fluidized solidified soil surrounding casting test device for pile foundation scour repair according to claim 1, characterized in that, The mechanical rotating device (2) includes an outer sleeve (9), an extension arm (10), a bearing (11), a rotating main ring (12), a knurled screw (13), a grid-patterned rotating arm (14), and a double V-shaped clamp (15); The outer sleeve (9) is fixedly sleeved outside the fixed column (6). The inner ring of the bearing (11) is fixed to the outer sleeve (9), and the outer ring is fixed to the rotating main ring (12). Knurled screws (13) are set in the area between the outer sleeve (9) and the rotating main ring (12) where there is no bearing (11). The knurled screws (13) pass through the rotating main ring (12) from the outer radial direction. When the knurled screws (13) are tightened, their inner ends abut against the outer wall of the outer sleeve (9) to achieve the fixation of the outer sleeve (9) and the rotating main ring (12). The rotating main ring (12) is circumferentially fixed with the extended arm (10). The vertical end of the extended arm (10) is rotatably connected to the gridded rotating arm (14). The extended arm (10) and the gridded rotating arm (14) are positioned by tightening screws. The end of the gridded rotating arm (14) is provided with a double V-shaped clamp (15). The double V-shaped clamp (15) is used to clamp and press the pump slurry pipe (1).

3. The fluidized solidified soil surrounding casting test device for pile foundation scour repair according to claim 1, characterized in that, The mechanical rotating device (2) further includes an inner sleeve (7) and a middle sleeve (8); the inner sleeve (7) and the middle sleeve (8) are used to adapt to fixed columns (6) of different specifications. When the shaft diameter of the fixed column (6) is small, it can be achieved by fixing the inner sleeve (7) and the middle sleeve (8) sequentially from the inside to the outside between the fixed column (6) and the outer sleeve (9).

4. The fluidized solidified soil surrounding casting test device for pile foundation scour repair according to claim 1, characterized in that, The punching mold (3) includes a vertical protective wall (16) and a frustum-shaped bottom shell (17); the vertical protective wall (16) is fitted and fixed to the outside of the lower end of the fixing column (6), the fixing column (6) extends through to the bottom end of the frustum-shaped bottom shell (17), and the frustum-shaped bottom shell (17) forms a funnel-shaped space with a closed bottom; the plane of the circumferential edge of the frustum-shaped bottom shell (17) is flush with the upper surface of the sand trough (5).

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