Underwater concrete pouring device and method for pile foundation in limestone cavern area

Abstract

The invention relates to the technical field of concrete pouring, and provides an underwater concrete pouring device and method.The underwater concrete pouring device for the pile foundation in the limestone cavern area comprises a plurality of grouting pipes, a grouting detection rod set, a slurry inlet assembly, a rod set detection assembly and a grouting limiting plate; the two ends of each grouting pipe are each provided with a quick connection assembly used for sequential butt joint of the grouting pipes, the multiple grouting detection rod sets correspond to the grouting pipes in a one-to-one mode, the grouting detection rod sets are rotationally arranged in the grouting pipes, and the grout inlet assemblies are detachably arranged at one ends of the grouting pipes. By means of the technical scheme, the problems that in the prior art, when pile foundation underwater concrete pouring is carried out in a limestone cave area, underground holes are difficult to detect, so that concrete is prone to having faults in the pouring process, and a pile body has quality defects are solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of underwater concrete pouring for pile foundations, and specifically, to an underwater concrete pouring device and method for pile foundations in limestone karst areas. Background Art

[0002] Underwater concrete pouring for pile foundations is a construction process in which concrete is poured in a pile hole with accumulated water in areas with a high groundwater level or during pile foundation construction. Currently, it is widely used in the foundation construction of large-scale projects such as bridges, docks, and high-rise buildings. Its working principle is to use a sealed and connected pouring conduit to transport concrete through the conduit to the bottom of the pile hole. As the concrete is continuously poured, the water or slurry in the hole is gradually displaced upward, thereby forming a dense concrete pile body underwater.

[0003] Although the existing technology is relatively mature in underwater concrete pouring for pile foundations, there are still certain problems in construction in complex terrains such as limestone karst areas. The specific problems are as follows:

[0004] As is well known, in limestone karst areas, due to the complexity of geological conditions, conventional monitoring means may be difficult to accurately obtain the quality information of the pile body, and the understanding of the underground situation is relatively vague. There are karst caves, solution channels, solution grooves, etc. in limestone karst areas. During the pouring process of concrete, it is easy for the concrete to flow through these channels and lose to the karst caves or surrounding voids, which not only causes waste of concrete materials, but also may lead to quality defects such as non-dense concrete in the pile body and the appearance of voids, affecting the bearing capacity of the pile. Summary of the Invention

[0005] To overcome the above defects, embodiments of the present disclosure provide an underwater concrete pouring device and method for pile foundations in limestone karst areas to solve the problem in the background art that when the existing technology performs underwater concrete pouring for pile foundations in limestone karst areas, it is difficult to detect underground holes, resulting in easy occurrence of concrete faults during the pouring process and quality defects in the pile body.

[0006] The technical solution of the present disclosure is as follows: An underwater concrete pouring device for pile foundations in limestone karst areas includes a grouting pipe, a grouting detection rod group, a slurry inlet assembly, a rod group detection assembly, and a grouting limit plate;

[0007] A plurality of the grouting pipes are provided, and quick-connection components are arranged at both ends of each grouting pipe for sequential docking of the grouting pipes;

[0008] A plurality of the grouting detection rod groups are provided, and the grouting detection rod groups correspond to the grouting pipes one by one. The grouting detection rod groups are rotatably arranged in the grouting pipes;

[0009] The slurry inlet assembly is detachably arranged at one end of the grouting pipe for injecting concrete slurry;

[0010] The rod group detection assembly is arranged on the grouting assembly, and the rod group detection assembly is detachably connected to the grouting detection rod group, and is used to drive the grouting detection rod group to rotate;

[0011] There are two grouting limit plates, which are detachably connected. A limit assembly is provided on each of the grouting limit plates, and a limit cavity is formed between the two limit assemblies for limiting the position of the grouting pipe and the slurry inlet assembly.

[0012] On the basis of the above scheme, the quick connection assembly comprises a convex docking ring, a quick connection block and a limit nut;

[0013] The convex butt joint ring is arranged at one end of the grouting pipe, and a plurality of L-shaped quick-connection grooves are provided in the convex butt joint ring;

[0014] There are a plurality of quick connection blocks, each of which is arranged on the grouting pipe, and each of the quick connection blocks corresponds to the L-shaped quick connection groove one by one;

[0015] There are a plurality of limit nuts, which are threadedly connected to the convex docking ring. The limit nuts correspond to the quick-connection blocks one by one and are used to limit the position of the quick-connection blocks.

[0016] As a preferred technical solution of the present application, the grouting detection rod set includes a detection rotating rod and a hexagonal docking rod;

[0017] A rotating seat is rotatably arranged on the detection rotating rod, and the rotating seat is arranged in the grouting pipe, wherein a plurality of blocking rods are arranged on one of the detection rotating rods, and the plurality of blocking rods are all located in the middle of the grouting pipe;

[0018] The hexagonal docking rod is arranged on one side of the detection rotating rod, and the other side of the detection rotating rod is provided with a hexagonal docking groove matched with the hexagonal docking rod.

[0019] On the basis of the above scheme, the slurry inlet assembly includes a slurry inlet bucket, a slurry inlet cover, a slurry inlet guide groove and a slurry inlet hoisting frame;

[0020] The bottom of the pulp inlet bucket is slidably sleeved in the convex docking ring, and the pulp inlet bucket is also provided with a plurality of quick-connection blocks adapted to the L-shaped quick-connection grooves for limiting the position of the pulp inlet bucket;

[0021] The pulp inlet cover is arranged on the pulp inlet hopper;

[0022] The slurry inlet guide grooves are provided in plurality, and the slurry inlet guide grooves are connected and arranged on the slurry inlet cover, and are used to guide the concrete slurry into the slurry inlet bucket;

[0023] The slurry inlet lifting frame is arranged on the slurry inlet hopper.

[0024] As a preferred technical solution of the present application, the rod group detection assembly includes a detection frame, a detection motor and a torque detector;

[0025] The detection frame is arranged on the slurry inlet cover;

[0026] The detection motor is installed on the detection frame, the output end of the detection motor penetrates through the slurry inlet cover and is provided with a hexagonal docking rod, and the hexagonal docking rod is adapted to the hexagonal docking groove;

[0027] The torque detector is arranged on the output end of the detection motor and is used to test the torque of the detection motor.

[0028] On the basis of the foregoing solution, the limiting assembly includes a limiting frame, a pipeline limiting cylinder and a feeding limiting cylinder;

[0029] The limiting frame is arranged on the grouting limiting plate;

[0030] The pipeline limiting cylinder is installed on one side of the limiting frame, and a pipeline limiting block is arranged at the output end of the pipeline limiting cylinder;

[0031] The feeding limiting cylinder is installed on one side of the limiting frame, and a feeding limiting block is arranged at the output end of the feeding limiting cylinder.

[0032] Furthermore, on the basis of the foregoing solution, a plurality of balance adjustment components are further arranged on the grouting limiting plate for balancing adjustment and positioning of the position of the grouting limiting plate;

[0033] The balance adjustment component includes an adjustment pipe, an adjustment screw rod, an adjustment cylinder and a barbed limiting seat;

[0034] The adjustment pipe is arranged through the grouting limiting plate, and an adjustment block is rotatably arranged at one end of the adjustment pipe;

[0035] The adjustment screw rod is arranged on the adjustment block, the adjustment screw rod is located in the adjustment pipe, and an adjustment ball nut group is threadedly connected to the adjustment screw rod;

[0036] The adjustment cylinder is slidably sleeved on the adjustment pipe, a middle adjustment rod is arranged between the adjustment ball nut group and the adjustment cylinder, and the adjustment screw rod is located in the middle adjustment rod;

[0037] The barbed limiting seat is arranged at the bottom of the adjustment cylinder.

[0038] A method for underwater concrete pouring of pile foundations in limestone karst areas, using the above-mentioned underwater concrete pouring device for pile foundations in limestone karst areas, includes the following steps:

[0039] Step 1, preparation before injection, when pouring concrete slurry in the pile hole after the hole is cleaned, pre-embed the steel cage in the pile hole in advance, dock the two grouting limit plates above the pile hole, and rotate the adjustment block to drive the adjustment screw to rotate, and the rotation of the adjustment screw drives the adjustment ball nut group to move, and the movement of the adjustment ball nut group drives the central air conditioning rod to move, and the central air conditioning rod drives the adjustment tube to move, and the adjustment tube drives the barbed limit seat to move, so that the barbed limit seat is inserted below the ground, and the parallelism of the grouting limit plate is adjusted by adjusting the position of the adjustment tube;

[0040] Step 2: Assembly before injection: After positioning the grouting limit plate, connect the grouting pipes in sequence through the quick-connect assembly according to the depth of the pile hole, extend the grouting pipes into the pile hole, connect the grouting assembly to the grouting pipe, and connect the grouting pipe with a barrier rod inside to the bottom of the pile hole;

[0041] Step 3: Slurry pouring: After the grouting pipe is placed in the pile hole, concrete slurry is poured into the grouting guide groove in the grouting assembly, so that the concrete slurry is poured into the bottom of the pile hole along the grouting bucket and the grouting pipe. As the concrete slurry is poured, the grouting pipe is slowly lifted upwards, and the concrete in the grouting pipe is continuously poured into the pile hole under the action of gravity;

[0042] Step 4: Detection of slurry in the pipe. When pouring concrete, start the detection motor. The output end of the detection motor drives the hexagonal docking rod, the detection rotating rod and the blocking rod to rotate. The torque at the output end of the detection motor is detected by the torque detector. By monitoring the torque at the output end of the detection motor, the position of the concrete slurry in the grouting pipe can be determined.

[0043] The beneficial effects of the present disclosure are:

[0044] 1. In the present disclosure, by arranging a balance adjustment component on the grouting limit plate, when pouring concrete slurry, the position of the grouting limit plate can be adjusted horizontally according to the uneven ground above the pile hole by arbitrarily adjusting the position of each barbed limit seat, and by arranging an adjustment tube and an adjustment cylinder, the grouting limit plate is erected above the ground, not only in the process of pouring the pile hole, but also the water flowing out of the pile hole can flow under the grouting limit plate, and the operator can stand on the grouting limit plate, providing the operator with a dry working environment;

[0045] 2. In the present disclosure, by providing a quick-connect assembly and a limit assembly, the grouting pipes can be clamped and fixed, so as to assist the grouting pipes to be quickly connected in sequence, and the grouting pipes can be extended to the inside of the pile hole, thereby improving the efficiency of the grouting;

[0046] 3. In the present disclosure, by providing a grouting detection rod group and a rod group detection assembly, when pouring concrete slurry, since there are a large number of cavities such as karst caves and karst grooves in the limestone karst cave area, in order to prevent the grouting pipe from lifting upward during the pouring of concrete, a large amount of concrete flowing into the karst cave, resulting in a fault between the concrete in the grouting pipe and the concrete poured into the pile hole. During the lifting process of the grouting pipe, the detection motor can be started to detect the torque at the output end of the detection motor. When the liquid level of the concrete in the grouting pipe is lower than the blocking rod, the torque of the detection motor will suddenly decrease at this time. At this time, it is necessary to stop the upward adjustment of the position of the grouting pipe and continue to inject concrete into the grouting pipe. After the concrete is poured, continue to lift the grouting pipe to complete the pouring of the concrete in the pile hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description in the embodiments of the present disclosure. Obviously, the drawings in the following description are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the exemplary embodiments of the present disclosure and these drawings.

[0048] Figure 1 It is a schematic diagram of the overall structure of a device for underwater concrete pouring of a pile foundation in a limestone karst cave area in an embodiment of the present disclosure;

[0049] Figure 2 It is a schematic diagram of the partial sectional structure of a device for underwater concrete pouring of a pile foundation in a limestone karst cave area in an embodiment of the present disclosure;

[0050] Figure 3 In the present disclosure Figure 2 It is a schematic diagram of the partial enlarged structure at location A;

[0051] Figure 4 In the present disclosure Figure 2 It is a schematic diagram of the partial enlarged structure at location B;

[0052] Figure 5 In the present disclosure Figure 2 It is a schematic diagram of the partial enlarged structure at location C;

[0053] Figure 6 It is a schematic diagram of the partial sectional structure of the balance adjustment component in an embodiment of the present disclosure.

[0054] In the figure: 001, quick connection component; 002, grouting detection rod group; 003, slurry inlet component; 004, rod group detection component; 005, limit component;

[0055] 1. Grouting pipe; 2. Grouting limit plate; 3. Convex docking ring; 4. Quick connection block; 5. Limit nut; 6. Detection rotating rod; 7. Rotating base; 8. Hexagonal docking rod; 9. Inlet slurry hopper; 10. Inlet slurry cover; 11. Inlet slurry diversion groove; 12. Inlet slurry lifting frame; 13. Detection frame; 14. Detection motor; 15. Torque detector; 16. Limit frame; 17. Pipeline limit cylinder; 18. Pipeline limit block; 19. Feed limit cylinder; 20. Feed limit block; 21. Position adjustment pipe; 22. Position adjustment block; 23. Position adjustment lead screw; 24. Position adjustment ball nut group; 25. Position adjustment cylinder; 26. Middle position adjustment rod; 27. Barbed limit seat. Detailed implementation manners

[0056] The following further elaborates on the present disclosure in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are merely for explaining the present disclosure and not for limiting the present disclosure.

[0057] To make the drawings concise, only the parts related to the disclosure are schematically shown in each drawing, and they do not represent their actual structures as products. Additionally, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this document, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".

[0058] In this document, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0059] In the present disclosure, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature can include the direct contact between the first and second features, or can also include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0060] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of description and simplifying the operations, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present disclosure.

[0061] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0062] Embodiment 1, as Figures 1 to 6 shown, a device for underwater concrete grouting of pile foundations in limestone karst areas includes a grouting pipe 1, a grouting detection rod group 002, a slurry inlet assembly 003, a rod group detection assembly 004, and a grouting limit plate 2.

[0063] For the above, there are multiple grouting pipes 1. Quick-connection components 001 are provided at both ends of each grouting pipe 1 for the sequential docking of the grouting pipes 1. The quick-connection component 001 includes a convex docking ring 3, a quick-connection block 4, and a limit nut 5. The convex docking ring 3 is provided at one end of the grouting pipe 1. A plurality of L-shaped quick-connection grooves are formed in the convex docking ring 3. There are multiple quick-connection blocks 4, which are provided on the grouting pipe 1. The quick-connection blocks 4 correspond to the L-shaped quick-connection grooves one by one. There are multiple limit nuts 5, which are threadedly connected to the convex docking ring 3. The limit nuts 5 correspond to the quick-connection blocks 4 one by one and are used to limit the positions of the quick-connection blocks 4.

[0064] Specifically, when quickly connecting the grouting pipes 1, make the quick-connection block 4 in one grouting pipe 1 slide in the L-shaped quick-connection groove in the convex docking ring 3 on another grouting pipe 1. By tightening the limit nut 5, connect the convex docking ring 3 with the docking block, and the quick connection of the grouting pipes 1 can be achieved. To ensure the sealing between the two grouting pipes 1, a sealing gasket can be laid at the position where the convex docking ring 3 contacts the grouting pipe 1.

[0065] For the above, there are multiple grouting detection rod groups 002, which correspond to the grouting pipes 1 one by one. The grouting detection rod groups 002 are rotatably arranged in the grouting pipes 1. The grouting detection rod group 002 includes a detection rotating rod 6 and a hexagonal docking rod 8. A rotating seat 7 is rotatably arranged on the detection rotating rod 6, and the rotating seat 7 is arranged in the grouting pipe 1. A plurality of blocking rods are arranged on one of the detection rotating rods 6, and all the plurality of blocking rods are located in the middle of the grouting pipe 1. The hexagonal docking rod 8 is arranged on one side of the detection rotating rod 6, and a hexagonal docking groove adapted to the hexagonal docking rod 8 is formed on the other side of the detection rotating rod 6.

[0066] Specifically, while the grouting pipe 1 is quickly docked, the hexagonal docking rod 8 inside the grouting pipe 1 needs to be extended into the hexagonal docking groove inside another grouting pipe 1 to achieve the docking operation of the grouting detection rod group 002 inside the two grouting pipes 1.

[0067] As described above, the slurry inlet assembly 003 is detachably arranged at one end of the grouting pipe 1 and is used for injecting concrete slurry. The slurry inlet assembly 003 includes a slurry inlet hopper 9, a slurry inlet cover 10, a slurry inlet diversion groove 11 and a slurry inlet lifting frame 12. The bottom of the slurry inlet hopper 9 is slidably sleeved inside the convex docking ring 3. The slurry inlet hopper 9 is also provided with a plurality of quick-connecting blocks 4 adapted to the L-shaped quick-connecting grooves for limiting the position of the slurry inlet hopper 9. The slurry inlet cover 10 is arranged on the slurry inlet hopper 9. There are a plurality of slurry inlet diversion grooves 11, and the slurry inlet diversion grooves 11 are communicated and arranged on the slurry inlet cover 10 for guiding the concrete slurry into the slurry inlet hopper 9. The slurry inlet lifting frame 12 is arranged on the slurry inlet hopper 9.

[0068] Specifically, by arranging the quick-connecting blocks 4 on the slurry inlet hopper 9, the slurry inlet hopper 9 can be quickly connected to the convex docking ring 3. After the slurry inlet hopper 9 is connected, the concrete slurry for filling the pile hole can be poured into the slurry inlet hopper 9 through the slurry inlet diversion grooves 11, so that the concrete in the slurry inlet hopper 9 flows into the grouting pipe 1. By arranging the slurry inlet lifting frame 12 on the slurry inlet hopper 9, it is convenient for external lifting equipment to quickly assist in the disassembly operation of the slurry inlet hopper 9 by lifting the slurry inlet hopper 9. And after the slurry inlet hopper 9 is docked with the slurry inlet pipe, by lifting the slurry inlet lifting frame 12, it is convenient for the grouting pipe 1 to move upward in the pile hole.

[0069] As described above, the rod group detection assembly 004 is arranged on the slurry inlet assembly 003. The rod group detection assembly 004 is detachably connected to the grouting detection rod group 002 and is used to drive the grouting detection rod group 002 to rotate. The rod group detection assembly 004 includes a detection frame 13, a detection motor 14 and a torque detector 15. The detection frame 13 is arranged on the slurry inlet cover 10. The detection motor 14 is installed on the detection frame 13. The output end of the detection motor 14 penetrates through the slurry inlet cover 10 and is provided with a hexagonal docking rod 8. The hexagonal docking rod 8 is adapted to the hexagonal docking groove. The torque detector 15 is arranged on the output end of the detection motor 14 for testing the torque of the detection motor 14.

[0070] Among them, the torque detector 15 is a device in the prior art for detecting the torque of the output end of the detection motor 14. The specific structure is not the main innovation point of the present disclosure, and its function only needs to be able to quickly detect the torque of the output end of the detection motor 14.

[0071] Specifically, when pouring concrete, since there are a large number of cavities such as karst caves and solution grooves in the limestone karst cave area, in order to prevent the grouting pipe 1 from lifting upward during the pouring of concrete, resulting in a large amount of concrete flowing into the karst cave, causing a fault problem between the concrete in the grouting pipe 1 and the concrete poured in the pile hole. During the lifting process of the grouting pipe 1, start the detection motor 14. The output end of the detection motor 14 drives the hexagonal docking rod 8, the detection rotating rod 6 and the blocking rod to rotate. When the liquid level of the concrete in the grouting pipe 1 is lower than the blocking rod, at this time, the torque of the detection motor 14 will suddenly decrease. At this time, it is necessary to stop the upward adjustment of the position of the grouting pipe 1, and it is necessary to continue to inject concrete into the grouting pipe 1. After the concrete is poured, continue to lift the grouting pipe 1 to complete the pouring of the concrete in the pile hole.

[0072] It should be added that after the concrete pouring is completed, in order to prevent the residue of concrete on the blocking rod, resulting in an increase in the volume of the blocking rod, it is necessary to clean the detection rotating rod 6 and the blocking rod of the blocking rod. And during the cleaning process, drive the blocking rod to move at high speed through the detection motor 14. Under the action of centrifugal force, the blocking rod can also be kept clean.

[0073] As described above, there are two grouting limit plates 2, and the two grouting limit plates 2 are detachably connected. Each grouting limit plate 2 is provided with a limit component 005. A limit cavity is formed between the two limit components 005 for limiting the positions of the grouting pipe 1 and the slurry inlet component 003.

[0074] Among them, the limit component 005 includes a limit frame 16, a pipeline limit cylinder 17 and a feed limit cylinder 19. The limit frame 16 is arranged on the grouting limit plate 2. The pipeline limit cylinder 17 is installed on one side of the limit frame 16. The output end of the pipeline limit cylinder 17 is provided with a pipeline limit block 18. The feed limit cylinder 19 is installed on one side of the limit frame 16. The output end of the feed limit cylinder 19 is provided with a feed limit block 20.

[0075] Specifically, when docking the grouting pipe 1, the pipeline limit cylinder 17 and the feed limit cylinder 19 can be started. Through the movement of the pipeline limit block 18 and the feed limit block 20, the grouting pipe 1 is clamped and limited. When pouring concrete into the grouting hopper, in order to prevent the shaking of the grouting hopper, the position of the grouting hopper can be fixed by the feed limit block 20.

[0076] Among them, a plurality of balancing and adjusting components are also arranged on the grouting limit plate 2, which are used to balance and adjust and position the position of the grouting limit plate 2. The balancing and adjusting components include a positioning tube 21, a positioning screw 23, a positioning barrel 25 and a barbed limiting seat 27. The positioning tube 21 is arranged through the grouting limit plate 2, and an adjusting block 22 is rotatably arranged at one end of the positioning tube 21. The positioning screw 23 is arranged on the adjusting block 22, and the positioning screw 23 is located in the positioning tube 21. A positioning ball nut group 24 is threadedly connected to the positioning screw 23. The positioning barrel 25 is slidably sleeved on the positioning tube 21. A central air-conditioning rod 26 is arranged between the positioning ball nut group 24 and the positioning barrel 25. The positioning screw 23 is located in the central air-conditioning rod 26, and the barbed limiting seat 27 is arranged at the bottom of the positioning barrel 25.

[0077] Specifically, the two grouting limit plates 2 are docked above the pile hole, and the adjusting block 22 is rotated to drive the adjusting screw rod 23 to rotate, and the rotation of the adjusting screw rod 23 drives the adjusting ball nut group 24 to move, and the movement of the adjusting ball nut group 24 drives the central air conditioning positioning rod 26 to move, and the central air conditioning positioning rod 26 drives the adjusting tube 25 to move, and the adjusting tube 25 drives the barbed limit seat 27 to move, so that the barbed limit seat 27 is inserted below the ground, and by arranging the adjusting pipe 21 and the adjusting tube 25, the grouting limit plate 2 is erected above the ground, not only during the process of pile hole pouring, can the water flowing out of the pile hole flow under the grouting limit plate 2, but the operator can stand on the grouting limit plate 2, providing the operator with a dry working environment.

[0078] Embodiment 2, Embodiment 2 of the present disclosure proposes a method for underwater concrete pouring of pile foundations in limestone cave areas on the basis of Embodiment 1, and the specific method is as follows:

[0079] Preparation before injection: when pouring concrete slurry in the pile hole after the hole is cleaned, a steel cage is embedded in the pile hole in advance, and two grouting limit plates 2 are docked on the top of the pile hole. By rotating the adjusting block 22, the adjusting block 22 drives the adjusting screw 23 to rotate, and the rotation of the adjusting screw 23 drives the adjusting ball nut group 24 to move. The movement of the adjusting ball nut group 24 drives the central air conditioning positioning rod 26 to move, and the central air conditioning positioning rod 26 drives the adjusting tube 25 to move, and the adjusting tube 25 drives the barbed limit seat 27 to move, so that the barbed limit seat 27 is inserted below the ground, and the parallelism of the grouting limit plate 2 is adjusted by adjusting the position of the adjusting tube 25.

[0080] Pre-grouting assembly, after positioning the grouting limit plate 2, connect the grouting pipe 1 in sequence through the quick-connect assembly 001 according to the depth of the pile hole, extend the grouting pipe 1 into the pile hole, connect the slurry inlet assembly 003 to the grouting pipe 1, and connect the grouting pipe 1 with a barrier rod inside to the bottom of the pile hole.

[0081] Slurry perfusion: After placing the position of the grouting pipe 1 into the pile hole, inject concrete slurry into the grouting diversion groove 11 in the grouting assembly 003, so that the concrete slurry is poured into the bottom of the pile hole along the grouting hopper 9 and the grouting pipe 1. As the concrete slurry is poured, slowly lift the grouting pipe 1 upward. Under the action of gravity, the concrete in the grouting pipe 1 is continuously poured into the pile hole.

[0082] In-pipe slurry detection: When pouring concrete, start the detection motor 14. The output end of the detection motor 14 drives the hexagonal docking rod 8, the detection rotating rod 6 and the blocking rod to rotate. Detect the torque of the output end of the detection motor 14 through the torque detector 15. By monitoring the torque of the output end of the detection motor 14, the position of the concrete slurry in the grouting pipe 1 can be judged.

[0083] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and not to limit them. Although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and they should all be covered within the scope of the claims of the present disclosure.

Claims

1. An underwater concrete pouring device for pile foundations in limestone karst cave areas, characterized in that, Including: Grouting pipes (1), multiple grouting pipes (1) are provided, and quick-connection components (001) are arranged at both ends of each grouting pipe (1) for sequential docking of the grouting pipes (1); Grouting detection rod groups (002), multiple grouting detection rod groups (002) are provided, the grouting detection rod groups (002) correspond to the grouting pipes (1) one by one, and the grouting detection rod groups (002) are rotatably arranged in the grouting pipes (1); Grout inlet components (003), the grout inlet components (003) are detachably arranged at one end of the grouting pipes (1) for injecting concrete slurry; Rod group detection components (004), the rod group detection components (004) are arranged on the grout inlet components (003), and the rod group detection components (004) are detachably connected to the grouting detection rod groups (002) for driving the grouting detection rod groups (002) to rotate; Grouting limit plates (2), two grouting limit plates (2) are provided, the two grouting limit plates (2) are detachably connected, and limit components (005) are arranged on each grouting limit plate (2). A limit cavity is formed between the two limit components (005) for limiting the positions of the grouting pipes (1) and the grout inlet components (003).

2. The underwater concrete pouring device for pile foundation in limestone karst cave area according to claim 1, characterized in that, The quick-connection component (001) includes: Convex docking rings (3), the convex docking rings (3) are arranged at one end of the grouting pipes (1), and a plurality of L-shaped quick-connection grooves are formed in the convex docking rings (3); Quick-connection blocks (4), multiple quick-connection blocks (4) are provided, the quick-connection blocks (4) are arranged on the grouting pipes (1), and the quick-connection blocks (4) correspond to the L-shaped quick-connection grooves one by one; Limit nuts (5), multiple limit nuts (5) are provided, the limit nuts (5) are threadedly connected to the convex docking rings (3), and the limit nuts (5) correspond to the quick-connection blocks (4) one by one for limiting the positions of the quick-connection blocks (4).

3. The underwater concrete pouring device for pile foundation in limestone karst cave area according to claim 2, characterized in that, The grouting detection rod group (002) includes: Detection rotating rods (6), a rotating seat (7) is rotatably arranged on the detection rotating rods (6), the rotating seat (7) is arranged in the grouting pipe (1), and a plurality of blocking rods are arranged on one of the detection rotating rods (6), and all the blocking rods are located in the middle of the grouting pipe (1); Hexagonal docking rods (8), the hexagonal docking rods (8) are arranged on one side of the detection rotating rods (6), and hexagonal docking grooves adapted to the hexagonal docking rods (8) are formed on the other side of the detection rotating rods (6).

4. A device for underwater concrete pouring of pile foundations in limestone karst areas according to claim 3, characterized in that, The grout inlet component (003) includes: Grout inlet hoppers (9), the bottoms of the grout inlet hoppers (9) are slidably sleeved in the convex docking rings (3), and a plurality of quick-connection blocks (4) adapted to the L-shaped quick-connection grooves are further arranged on the grout inlet hoppers (9) for limiting the positions of the grout inlet hoppers (9); Grout inlet covers (10), the grout inlet covers (10) are arranged on the grout inlet hoppers (9); The slurry inlet diversion groove (11), there are multiple of the slurry inlet diversion grooves (11), and the slurry inlet diversion grooves (11) are communicatively arranged on the slurry inlet cover (10) for guiding the concrete slurry into the slurry inlet hopper (9); The slurry inlet lifting frame (12), and the slurry inlet lifting frame (12) is arranged on the slurry inlet hopper (9).

5. An underwater concrete pouring device for pile foundations in limestone karst cave areas according to claim 4, characterized in that, The rod group detection assembly (004) includes: The detection frame (13), and the detection frame (13) is arranged on the slurry inlet cover (10); The detection motor (14), the detection motor (14) is installed on the detection frame (13), the output end of the detection motor (14) penetrates through the slurry inlet cover (10) and is provided with a hexagonal docking rod (8), and the hexagonal docking rod (8) is adapted to the hexagonal docking groove; The torque detector (15), and the torque detector (15) is arranged on the output end of the detection motor (14) for testing the torque of the detection motor (14).

6. The underwater concrete pouring device for pile foundation in limestone karst cave area according to claim 5, characterized in that, The limit assembly (005) includes: The limit frame (16), and the limit frame (16) is arranged on the grouting limit plate (2); The pipeline limit cylinder (17), the pipeline limit cylinder (17) is installed on one side of the limit frame (16), and the output end of the pipeline limit cylinder (17) is provided with a pipeline limit block (18); The feeding limit cylinder (19), the feeding limit cylinder (19) is installed on one side of the limit frame (16), and the output end of the feeding limit cylinder (19) is provided with a feeding limit block (20).

7. An underwater concrete pouring device for pile foundations in limestone karst areas according to claim 6, characterized in that, A plurality of balance adjustment components are further arranged on the grouting limit plate (2) for balancing adjustment and positioning of the position of the grouting limit plate (2); The balance adjustment component includes: The adjustment pipe (21), the adjustment pipe (21) is penetrated and arranged on the grouting limit plate (2), and a adjustment block (22) is rotatably arranged at one end of the adjustment pipe (21); The adjustment screw rod (23), the adjustment screw rod (23) is arranged on the adjustment block (22), the adjustment screw rod (23) is located in the adjustment pipe (21), and an adjustment ball nut group (24) is threadedly connected to the adjustment screw rod (23); The adjustment cylinder (25), the adjustment cylinder (25) is slidably sleeved on the adjustment pipe (21), a middle adjustment rod (26) is arranged between the adjustment ball nut group (24) and the adjustment cylinder (25), and the adjustment screw rod (23) is located in the middle adjustment rod (26); The barbed limit seat (27), and the barbed limit seat (27) is arranged at the bottom of the adjustment cylinder (25).

8. A method for underwater concrete pouring of pile foundations in limestone karst areas, which uses an underwater concrete pouring device for pile foundations in limestone karst areas described in claim 7, is characterized in that, Including the following steps: S1. Preparation before injection. When pouring concrete slurry into the pile hole after hole cleaning, pre-bury the steel reinforcement cage in the pile hole in advance. Connect the two grouting limit plates (2) above the pile hole. By rotating the position adjustment block (22), the position adjustment block (22) drives the position adjustment screw rod (23) to rotate. The rotation of the position adjustment screw rod (23) drives the position adjustment ball nut group (24) to move. The movement of the position adjustment ball nut group (24) drives the middle position adjustment rod (26) to move. The middle position adjustment rod (26) drives the position adjustment cylinder (25) to move. The position adjustment cylinder (25) drives the barbed limit seat (27) to move, so that the barbed limit seat (27) is inserted below the ground. By adjusting the position of the position adjustment cylinder (25), the parallelism of the grouting limit plate (2) is adjusted. S2. Assembly before injection. After positioning the grouting limit plate (2), according to the depth of the pile hole, connect the grouting pipes (1) in sequence through the quick connection component (001), so that the grouting pipes (1) extend into the pile hole. Connect the slurry inlet component (003) to the grouting pipe (1), and connect the grouting pipe (1) with a barrier rod inside to the bottom of the pile hole. S3. Slurry pouring. After placing the grouting pipe (1) in the pile hole, pour concrete slurry into the slurry inlet diversion groove (11) in the slurry inlet component (003), so that the concrete slurry is poured into the bottom of the pile hole along the slurry inlet hopper (9) and the grouting pipe (1). As the concrete slurry is poured, slowly lift the grouting pipe (1) upward. Under the action of gravity, the concrete in the grouting pipe (1) is continuously poured into the pile hole. S4. Detection of slurry in the pipe. When pouring concrete, start the detection motor (14). The output end of the detection motor (14) drives the hexagonal docking rod (8), the detection rotating rod (6) and the barrier rod to rotate. The torque detector (15) detects the torque at the output end of the detection motor (14). By monitoring the torque at the output end of the detection motor (14), the position of the concrete slurry in the grouting pipe (1) can be judged.

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