Deep pile casing connection components in karst areas

Abstract

The present invention relates to the field of steel casing, specifically to a deep pile casing connection assembly in a karst area, a cylinder, and a connecting unit is provided on the cylinder; the connecting unit comprises an upper ring and a lower ring; the upper ring is welded to the outer ring of the upper end of the cylinder, the upper end face of the upper ring is flush with the upper end face of the cylinder, a plurality of entrances are evenly provided on the outer ring of the upper ring, and a bayonet is provided on the lower half of the entrance; the lower ring is welded to the outer ring of the lower end of the cylinder, the lower end face of the lower ring is flush with the lower end face of the cylinder, and the lower end face of the lower ring is provided with an L-shaped hook plate, and the hook plate provided at the lower end of the upper cylinder is rotated along the entrance provided at the upper end of the lower cylinder and embedded in the bayonet; the cooperation between the cylinder and the connecting unit in the present invention makes it possible to improve the installation and disassembly efficiency of the cylinder, thereby improving the construction efficiency, and at the same time, when the ground in the karst area is relatively complex, the installation and disassembly of the cylinder can also be carried out smoothly.

Description

Technical Field

[0001] The invention relates to the field of steel casings, in particular to a deep pile casing connection assembly in a karst area. Background Art

[0002] Steel casing is a construction device made of steel plates rolled into a tube shape. It is generally used in bored piles. Due to the instability of the soil, it is very difficult to construct reinforced concrete retaining walls. Therefore, steel retaining walls are used to protect the bored piles to prevent the hole from collapsing and avoid affecting the construction progress and safety.

[0003] When using the existing steel casing, a steel casing of matching length is placed in the hole according to the depth of the rotary drilled hole. Since the drilling depth is indefinite, but the length of a single steel casing is fixed, in order to match the drilling depth, two or more steel casings need to be welded end to end. However, the welding method is inefficient and seriously affects the construction progress of the pile foundation, especially in karst areas where the ground is uneven and complex. It is difficult to align the end to end of multiple steel casings by welding, which is not conducive to the smooth progress of construction.

[0004] Therefore, in order to solve the above problems, a deep pile casing connection assembly in karst area is proposed. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the karst area deep pile casing connection assembly described in the present invention includes a cylinder, and the cylinder is provided with a connection unit; the connection unit includes an upper ring and a lower ring; the upper ring is welded to the upper end outer ring of the cylinder, and the upper end face of the upper ring is flush with the upper end face of the cylinder, and multiple entrances are evenly provided on the outer ring of the upper ring, and a bayonet is provided in the lower half of the entrance; the lower ring is welded to the lower end outer ring of the cylinder, and the lower end face of the lower ring is flush with the lower end face of the cylinder, and the lower end face of the lower ring is provided with an L-shaped hook plate, and the hook plate provided at the lower end of the two adjacent cylinders is rotated along the entrance provided at the upper end of the lower cylinder and embedded in the bayonet.

[0007] Preferably, a sliding groove is provided on the outer ring of the upper ring, a locking ring is provided on the outer ring of the upper ring, a guide bar is provided on the inner ring of the locking ring, and the guide bar is slidably connected in the sliding groove; a fixing hole is provided on the surface of the locking ring; a threaded hole is provided on the surface of the upper ring, the locking ring is rotated to align the fixing hole with the threaded hole, and a bolt is screwed into the fixing hole.

[0008] Preferably, a semi-annular steel plate is provided on the back of each hook plate, the plate body of the hook plate is placed in the entrance, and the back of the steel plate is pressed against the inner wall of the entrance.

[0009] Preferably, a notch is provided on the outer edge of the steel plate, and the end of the guide bar slides into the notch along the guide groove.

[0010] Preferably, a plurality of elastic plates are fixedly connected to the upper end surface of the locking ring, and the ends of the elastic plates extend to the upper end surface of the cylinder; a convex portion is provided on one side of the inlet, and when the locking ring is rotated, the elastic plates pass over the convex portion.

[0011] Preferably, a socket is provided on the upper end surface of the upper ring; a plurality of tube bodies are evenly provided on the outer wall of the cylinder, the upper end of the tube body is connected to the socket, the lower end of the tube body is connected to the insert tube, and the insert tube is fixed to the lower end surface of the lower ring; the cross section of the tube body is semi-elliptical, and a plurality of spray holes are provided on the surface of the tube body.

[0012] Preferably, the spray holes are in a strip shape, and the spray holes are arranged on both sides outside the tube body in the vertical direction and in the middle of the tube body.

[0013] Preferably, a lifting auxiliary unit is provided at the upper end of the cylinder; the lifting auxiliary unit includes a cover plate, and a plurality of fixed blocks are evenly provided on the lower surface of the cover plate. The fixed blocks are arranged in a circular array on the lower surface of the cover plate, and a support rod is slidably connected to the fixed block. A window is provided on the upper surface of the cover plate at a position opposite to the support rod. The cover plate covers the upper end of the cylinder, and the end of the support rod is inserted into the lifting hole provided in the inner circle of the upper end of the cylinder.

[0014] Preferably, the pulling hole is provided along the inner side wall of the upper end of the cylinder body and penetrates into the interior of the upper ring.

[0015] Preferably, the elastic plate is arranged in a wave shape

[0016] The present invention is beneficial in that:

[0017] 1. The cooperation between the cylinder and the connecting unit in the present invention makes it possible to install or disassemble two adjacent cylinders without welding operations, thereby improving the installation and disassembly efficiency of the cylinders and thus improving the construction efficiency. At the same time, even in the case of complex ground in the karst area, the installation and disassembly of the cylinder can be carried out smoothly.

[0018] 2. The present invention provides a semi-annular steel plate with elasticity. When the hook plate is embedded in the entrance, the steel plate is pressed against the inner wall of the entrance, so that the hook plate is pressed against the inner wall of the entrance to ensure that the axes of the two adjacent cylinders are pre-fixed in relative rotation when the lock ring is not operated, so as to ensure that when the lock ring is rotated later, the end of the guide bar can be smoothly pressed against the hook plate, thereby providing safety for the installation of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a first-perspective perspective diagram of the connection assembly and the cylinder in the present invention;

[0020] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0021] Figure 3 This is a front view of the tube body of the present invention;

[0022] Figure 4 This is a three-dimensional diagram of the cooperation between the convex portion and the cylindrical body in the present invention;

[0023] Figure 5 It is a three-dimensional diagram of the cooperation of two adjacent connecting cylinders in the present invention;

[0024] Figure 6 for Figure 5 A partial enlarged view of point D in the middle;

[0025] Figure 7 This is a three-dimensional diagram of the cooperation between the cylinder and the cover plate in the present invention;

[0026] Figure 8 for Figure 7 A partial enlarged view of point E in the middle;

[0027] Figure 9 This is a first perspective stereoscopic view of the cylinder in the present invention;

[0028] Figure 10 for Figure 9 A partial enlarged view of point F in the middle;

[0029] Figure 11 is a three-dimensional diagram of the cover plate of the present invention;

[0030] Figure 12 is a three-dimensional diagram of the lock ring in the present invention;

[0031] Figure 13 A second perspective view of the connection assembly and the cylinder in the present invention;

[0032] Figure 14 for Figure 13 A partial enlarged view of point G in the middle;

[0033] Figure 15 This is a first perspective stereoscopic view of the cylinder in the present invention;

[0034] Figure 16 for Figure 15 A partial enlarged view of point H in the middle.

[0035] In the figure: 1. Cylinder; 2. Upper ring; 3. Lower ring; 4. Inlet; 5. Bayonet; 6. Hook plate; 7. Slide groove; 8. Lock ring; 9. Guide strip; 10. Fixing hole; 11. Threaded hole; 12. Steel plate; 13. Notch; 14. Elastic plate; 15. Protrusion; 17. Socket; 16. Tube body; 18. Insert tube; 19. Spray hole; 20. Cover plate; 21. Fixing block; 22. Support rod; 23. Window; 24. Pulling hole. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0037] Reference Figure 1-6 , a deep pile casing connection assembly in a karst area includes a cylinder 1, on which a connecting unit is provided; the connecting unit includes an upper ring 2 and a lower ring 3; the upper ring 2 is welded to the outer ring of the upper end of the cylinder 1, and the upper end face of the upper ring 2 is flush with the upper end face of the cylinder 1, and a plurality of inlets 4 are evenly arranged on the outer ring of the upper ring 2, and a bayonet 5 is provided on the lower half of the inlet 4; the lower ring 3 is welded to the outer ring of the lower end of the cylinder 1, and the lower end face of the lower ring 3 is flush with the lower end face of the cylinder 1, and the lower end face of the lower ring 3 is provided with an L-shaped hook plate 6. For the two adjacent cylinders 1 above and below, the hook plate 6 provided at the lower end of the upper cylinder 1 is rotated along the inlet 4 provided at the upper end of the lower cylinder 1 and embedded in the bayonet 5;

[0038] In this embodiment, a casing structure is designed that is easy to install and disassemble and eliminates the welding process. The specific operation is: the lower end of the upper cylinder 1 is close to the upper end of the lower cylinder 1, and the hook part of each hook plate 6 is slid along the inlet 4, and then the cylinder 1 is rotated or the two cylinders 1 are rotated in opposite directions so that the hook part of the hook plate 6 slides into the bayonet 5 at the inlet 4. At this time, the two adjacent cylinders 1 are connected together by the connecting unit, and then the cylinder 1 is hoisted by a crane to the hole drilled on the ground, and then concrete is poured into the cylinder 1, and then the cylinder 1 is pulled out, and then the cylinder 1 is pulled out. The two adjacent cylinders 1 are rotated in the opposite direction again, and the reverse rotation direction is opposite to the above-mentioned reverse rotation direction, so that the hook body of the hook plate 6 is rotated to the position of the entrance 4, and then the two cylinders 1 are moved outward along the axis, the hook plate 6 is separated from the entrance 4, and the two adjacent cylinders 1 are separated; the cooperation between the cylinder 1 and the connecting unit makes it possible for the two adjacent cylinders 1 to be installed together or disassembled and separated without the need for welding operations, which can improve the installation and disassembly efficiency of the cylinder 1, thereby improving the construction efficiency. At the same time, when the ground in the karst area is relatively complex, the installation and disassembly of the cylinder 1 can also be carried out smoothly.

[0039] Reference Figure 2 、 Figure 4 、 Figure 8 and Figure 12The outer ring of the upper ring 2 is provided with a slide groove 7, and a locking ring 8 is provided on the outer ring of the upper ring 2. The inner ring of the locking ring 8 is provided with a guide bar 9, and the guide bar 9 is slidably connected in the slide groove 7; the surface of the locking ring 8 is provided with a fixing hole 10; the surface of the upper ring 2 is provided with a threaded hole 11, and the locking ring 8 is rotated to align the fixing hole 10 with the threaded hole 11, and the bolt is screwed into the fixing hole 10; after the two adjacent cylinders 1 are assembled, the cylinder 1 is craned into the hole on the ground, and the lower cylinder 1 first contacts the inner wall of the hole in the ground, and there is friction between the soil and the lower cylinder 1. If the upper cylinder 1 rotates when being hoisted by the crane, the lower cylinder 1 is difficult to rotate due to the friction between it and the soil. When the upper cylinder 1 rotates, the hook plate 6 will be separated from the bayonet 5. Once the rotation occurs, the resulting hook plates 6 will be separated from the bayonet 5, which will cause the two adjacent cylinders 1 to separate, resulting in a serious construction accident. For this purpose, a locking ring 8 is provided. When the hook body of the hook plate 6 is placed in the bayonet 5 position, the locking ring 8 is rotated so that the end of the guide bar 9 slides into the inlet 4 position along the slide groove 7 and presses against the plate body of the hook plate 6. Then, the screws are rotated in the fixing holes 10 and the threaded holes 11 in sequence to fix the locking ring 8, thereby stably pressing the end of the guide bar 9 against the hook plate 6, thereby squeezing the hook body of the hook plate 6 stably in the bayonet 5, and then ensuring the stability between the two adjacent cylinders 1.

[0040] Reference Figure 6 and Figure 8 , a semi-annular steel plate 12 is provided on the back of each of the above-mentioned hook plates 6, the plate body of the hook plate 6 is placed in the inlet 4, and the back of the steel plate 12 is pressed against the inner wall of the inlet 4; by providing a semi-annular steel plate 12, and the steel plate 12 is elastic, when the plate body of the hook plate 6 is embedded in the inlet 4, the steel plate 12 is pressed against the inner wall of the inlet 4, and the plate body of the hook plate 6 is pressed against the inner wall of the inlet 4 to ensure that when the lock ring 8 is not operated, the relative rotation of the axes of the two adjacent cylinders 1 is pre-fixed to ensure that when the lock ring 8 is rotated later, the end of the guide bar 9 can be smoothly pressed against the plate body of the hook plate 6, providing safety for the installation of the cylinder 1.

[0041] Reference Figure 6 and Figure 8 , a notch 13 is provided on the outer edge of the above-mentioned steel plate 12, and the end of the guide bar 9 slides to the notch 13 along the guide groove; the lock ring 8 rotates, and the end of the guide bar 9 presses against the plate body of the hook plate 6, and at the same time, the guide bar 9 passes through the notch 13 and presses against the plate body. After repeated use of the steel plate 12, the inner wall of the inlet 4 and the steel plate 12 are squeezed, and the steel plate 12 undergoes irreversible deformation, which results in a gap between the plate body of the hook plate 6 and the inner wall of the inlet 4. The hook plate 6 will detach from the inlet 4, and a notch 13 is provided, and the guide bar 9 is embedded in the notch 13, which constrains the relative movement between the guide bar 9 and the steel plate 12, thereby constraining the tendency of the axes of the upper and lower cylinders 1 to separate, and also provides safety for the installation of the cylinder 1.

[0042] Reference Figure 12 and Figure 14 , a plurality of elastic plates 14 are fixedly connected to the upper end surface of the above-mentioned lock ring 8, and the ends of the elastic plates 14 extend to the upper end surface of the cylinder 1; a convex portion 15 is provided on one side of the above-mentioned inlet 4, and the lock ring 8 is rotated, and the elastic plates 14 pass over the convex portion 15; by providing the elastic plates 14, the lock ring 8 is rotated, and the elastic plates 14 pass over the convex portion 15, at this time the threaded hole 11 is aligned with the fixing hole 10, and when the bolt is not screwed into the threaded hole 11, the lock ring 8 is stabilized in advance by the extrusion constraint of the elastic plates 14 and the convex portion 15 to prevent the lock ring 8 from rotating, causing the threaded hole 11 and the fixing hole 10 to be misaligned, affecting the installation of the screw.

[0043] Reference Figure 3 、 Figure 4 and Figure 16 , the upper end surface of the upper ring 2 is provided with an insertion hole 17; a plurality of tubes 16 are evenly provided on the outer wall of the cylinder 1, the upper end of the tube 16 is connected to the insertion hole 17, and the lower end of the tube 16 is connected to the insertion tube 18, and the insertion tube 18 is fixed to the lower end surface of the lower ring 3; the cross section of the tube 16 is semi-elliptical, and a plurality of spray holes 19 are provided on the surface of the tube 16; in the process of pulling the cylinder 1 out of the hole in the ground, the friction between the inner wall of the cylinder 1 and the soil will hinder the upward movement of the cylinder 1, for this purpose, the tube 16 with the spray hole 19 is provided; in the process of pulling the cylinder 1 out In the process, a hose is used to connect the socket 17 at the upper end surface of the upper cylinder 1, and then gas is pumped in through an air pump. The gas is discharged from the nozzle 19 on the tube 16. A large amount of high-pressure gas forms a layer of air mold between the cylinder 1 and the soil, reducing the friction between the cylinder 1 and the soil, which helps to smoothly execute the pulling-up action of the cylinder 1. At the same time, the lower cylinder 1 is inserted into the socket 17 on the lower cylinder 1 through the insert tube 18 of the upper cylinder 1 to realize the gas transfer, so that the tube 16 on the outer wall of the lower cylinder 1 also sprays gas, which helps to pull the cylinder 1 out.

[0044] Reference Figure 3 and Figure 15 The above-mentioned spray holes 19 are in a strip shape, and the spray holes 19 are arranged on both sides of the tube body 16 in the vertical direction, as well as in the middle of the tube body 16; the spray holes 19 are arranged in a strip shape to increase the gas discharge area. At the same time, the arrangement of the spray holes 19 on the tube body 16 enables the gas to quickly form a layer of air mold between the soil and the cylinder body 1, and the air mold layer is relatively stable, which is helpful for pulling out the cylinder body 1.

[0045] Reference Figure 5 、 Figure 7 、 Figure 10 、 Figure 11 and 12, the upper end of the above-mentioned cylinder 1 is provided with a lifting auxiliary unit; the above-mentioned lifting auxiliary unit includes a cover plate 20, and a plurality of fixed blocks 21 are evenly provided on the lower surface of the cover plate 20, and the fixed blocks 21 are arranged in a circular array on the lower surface of the cover plate 20, and a support rod 22 is slidably connected to the fixed block 21. A window 23 is provided on the upper surface of the cover plate 20 at a position opposite to the support rod 22, and the cover plate 20 covers the upper end of the cylinder 1, and the end of the support rod 22 is inserted into the lifting hole 24 provided in the inner circle of the upper end of the cylinder 1; the cover plate 20 is provided, and the cover plate 20 can cover the upper cylinder 1 to prevent foreign matter such as soil from being mixed into the poured concrete. At the same time, the support rod 22 is provided on the cover plate 20. Close the window 23, pass the hoisted wire rope into the window 23, pass it around the support rod 22 and then take it out from the window 23, tie the wire rope to the support rod 22, as for the cooperation between the cover plate 20 and the cylinder 1, buckle the cover plate 20 on the upper cylinder 1, and then drive the support rod 22 so that the end of the support rod 22 passes through the lifting hole 24 on the cylinder 1. At this time, the cover plate 20 is fixed to the cylinder 1, and then the cylinder 1 can be pulled out through the upper body wire rope of the crane. The cover plate 20 can pull out the cylinder 1 in each rotary drilling hole one by one, and there is no need to install the wire rope on the cylinder 1 or remove it from the cylinder 1, which reduces the installation and removal steps of the wire rope and improves efficiency.

[0046] Reference Figure 4 The above-mentioned pulling hole 24 is set along the inner side wall of the upper end of the cylinder 1 to the interior of the upper ring 2; the pulling hole 24 is set to penetrate into the interior of the upper ring 2, thereby extending the effective supporting length of the support rod 22 and the cylinder 1 and improving the stability between the cylinder 1 and the support rod 22.

[0047] Reference Figure 14 The above-mentioned elastic plate 14 is arranged in a wavy shape; when the elastic plate 14 has not passed over the convex portion 15, the edge of the elastic plate 14 relatively close to the convex portion 15 is set to be tilted upward, and the edge of the elastic plate 14 relatively far away from the convex portion 15 is tilted downward. When the elastic plate 14 passes over the convex portion 15, the edge of the elastic plate 14 away from the convex portion 15 is tilted upward, and the edge of the elastic plate 14 relatively close to the convex portion 15 is tilted downward and pressed against the bottom of the convex portion 15, ensuring that the elastic plate 14 can stabilize its position at this time, and also ensuring the stability of the lock ring 8.

[0048] Working principle: In this embodiment, a casing structure is designed that is easy to install and disassemble and eliminates the welding process; the specific operation is: the lower end of the upper cylinder 1 is close to the upper end of the lower cylinder 1, and the hook part of each hook plate 6 is slid along the inlet 4, and then the cylinder 1 is rotated or the two cylinders 1 are rotated in opposite directions, so that the hook part of the hook plate 6 slides into the bayonet 5 at the inlet 4. At this time, the two adjacent cylinders 1 are connected together through the connecting unit, and then the cylinder 1 is hoisted by a crane to the hole drilled on the ground, and then concrete is poured into the cylinder 1, and then the cylinder 1 is pulled out. Then the two adjacent cylinders 1 rotate in the opposite direction again, and the reverse rotation direction this time is opposite to the above-mentioned reverse rotation direction, so that the hook body of the hook plate 6 rotates to the entrance 4 position, and then the two cylinders 1 are moved outward along the axis, the hook plate 6 is separated from the entrance 4, and the two adjacent cylinders 1 are separated; the cooperation between the cylinder 1 and the connecting unit makes it possible for the two adjacent cylinders 1 to be installed together or disassembled and separated without the need for welding operations, which can improve the installation and disassembly efficiency of the cylinder 1, thereby improving the construction efficiency. At the same time, when the ground in the karst area is relatively complex, the installation and disassembly of the cylinder 1 can also be carried out smoothly.

[0049] When the upper cylinder 1 rotates during the crane hoisting, the lower cylinder 1 is difficult to rotate due to the friction between the lower cylinder 1 and the soil, and the upper cylinder 1 rotates, which will cause the hook plate 6 to disengage from the bayonet 5. Once the rotation occurs, the resulting hook plates 6 will all disengage from the bayonet 5, causing the two adjacent cylinders 1 to disengage, resulting in a serious construction accident. For this purpose, a locking ring 8 is provided. When the hook body of the hook plate 6 is placed in the bayonet 5 position, the locking ring 8 is rotated so that the end of the guide bar 9 slides along the slide groove 7 into the inlet 4 position and presses on the plate body of the hook plate 6. Then, the screws are rotated in the fixing holes 10 and the threaded holes 11 in sequence to fix the locking ring 8, so that the end of the guide bar 9 is stably pressed against the hook plate 6, thereby squeezing the hook body of the hook plate 6 stably in the bayonet 5, thereby ensuring the stability between the two adjacent cylinders 1.

[0050] By providing a semi-annular steel plate 12, which is elastic, the steel plate 12 is pressed against the inner wall of the inlet 4 during the process of the hook plate 6 being embedded in the inlet 4, and the hook plate 6 is pressed against the inner wall of the inlet 4 to ensure that the axes of the two adjacent cylinders 1 are pre-fixed in relative rotation when the lock ring 8 is not operated, so as to ensure that when the lock ring 8 is rotated later, the end of the guide bar 9 can be smoothly pressed against the plate body of the hook plate 6, thereby providing safety for the installation of the cylinder 1.

[0051] The locking ring 8 rotates, and the end of the guide bar 9 presses against the plate body of the hook plate 6. At the same time, the guide bar 9 passes through the notch 13 and presses against the plate body. After repeated use, the inner wall of the inlet 4 and the steel plate 12 are squeezed, and the steel plate 12 undergoes irreversible deformation, which causes a gap to remain between the plate body of the hook plate 6 and the inner wall of the inlet 4. The hook plate 6 will detach from the inlet 4. A notch 13 is provided, and the guide bar 9 is embedded in the notch 13 to constrain the relative movement between the guide bar 9 and the steel plate 12, thereby constraining the tendency of the axes of the upper and lower cylinders 1 to separate, and also providing safety for the installation of the cylinder 1.

[0052] By setting the elastic plate 14 and rotating the locking ring 8, the elastic plate 14 passes over the convex portion 15. At this time, the threaded hole 11 is aligned with the fixing hole 10. When the bolt is not screwed into the threaded hole 11, the locking ring 8 is stabilized in advance by the extrusion constraint of the elastic plate 14 and the convex portion 15 to prevent the locking ring 8 from rotating, causing the threaded hole 11 and the fixing hole 10 to be misaligned, thereby affecting the installation of the screw.

[0053] During the process of pulling the cylinder 1 out of the hole in the ground, the friction between the inner wall of the cylinder 1 and the soil will hinder the upward movement of the cylinder 1. For this purpose, a tube 16 with a spray hole 19 is provided; during the process of pulling out the cylinder 1, a hose is used to connect the socket 17 at the upper end surface of the upper cylinder 1, and then gas is pumped in through an air pump. The gas is discharged from the spray hole 19 on the tube 16. A large amount of high-pressure gas forms a layer of air mold between the cylinder 1 and the soil, reducing the friction between the cylinder 1 and the soil, which helps to smoothly execute the upward pulling action of the cylinder 1. At the same time, the lower cylinder 1 is inserted into the socket 17 on the lower cylinder 1 through the insert tube 18 of the upper cylinder 1 to realize the gas transfer, so that the tube 16 on the outer wall of the lower cylinder 1 also sprays gas, which helps to pull the cylinder 1 out.

[0054] The nozzle hole 19 is set in a strip shape to increase the gas discharge area. At the same time, the position of the nozzle hole 19 on the tube body 16 allows the gas to quickly form a layer of air mold between the soil and the cylinder 1, and the air mold layer is relatively stable, which helps to pull out the cylinder 1.

[0055] The cover plate 20 is provided with a cover plate 20, which can cover the upper cylinder 1 to prevent foreign matter such as soil from being mixed into the poured concrete. At the same time, a support rod 22 is provided on the cover plate 20 to cooperate with the window 23. The hoisted wire rope is passed through the window 23, passed around the support rod 22, and then taken out from the window 23, and the wire rope is tied to the support rod 22. As for the cooperation between the cover plate 20 and the cylinder 1, the cover plate 20 is buckled on the upper cylinder 1, and then the support rod 22 is driven so that the end of the support rod 22 passes through the lifting hole 24 on the cylinder 1. At this time, the cover plate 20 is fixed to the cylinder 1, and then the cylinder 1 can be pulled out by the upper body wire rope of the crane. The cover plate 20 can be pulled out of each rotary drilling hole one by one, and there is no need to install the wire rope on the cylinder 1, or remove it from the cylinder 1, which reduces the installation and removal steps of the wire rope and improves efficiency.

[0056] 9. The deep pile casing connection assembly for karst areas according to claim 8 is characterized in that: the pulling hole 24 is set along the inner side wall of the upper end of the cylinder 1 and penetrates into the interior of the upper ring 2; the pulling hole 24 is set to penetrate into the interior of the upper ring 2 to extend the effective supporting length of the support rod 22 and the cylinder 1, thereby improving the stability between the cylinder 1 and the support rod 22.

[0057] 10. The karst area deep pile casing connection assembly according to claim 9 is characterized in that: the elastic plate 14 is arranged in a wavy shape; when the elastic plate 14 has not passed over the convex portion 15, the edge of the elastic plate 14 relatively close to the convex portion 15 is arranged to be tilted upward, and the edge of the elastic plate 14 relatively away from the convex portion 15 is tilted downward; when the elastic plate 14 passes over the convex portion 15, the edge of the elastic plate 14 away from the convex portion 15 is tilted upward, and the edge of the elastic plate 14 relatively close to the convex portion 15 is tilted downward and pressed against the bottom of the convex portion 15, thereby ensuring that the elastic plate 14 can stabilize its position at this time, and also ensuring the stability of the locking ring 8.

[0058] Working principle: In this embodiment, a casing structure is designed that is easy to install and disassemble and eliminates the welding process; the specific operation is: the lower end of the upper cylinder 1 is close to the upper end of the lower cylinder 1, and the hook part of each hook plate 6 is slid along the inlet 4, and then the cylinder 1 is rotated or the two cylinders 1 are rotated in opposite directions, so that the hook part of the hook plate 6 slides into the bayonet 5 at the inlet 4. At this time, the two adjacent cylinders 1 are connected together through the connecting unit, and then the cylinder 1 is hoisted by a crane to the hole drilled on the ground, and then concrete is poured into the cylinder 1, and then the cylinder 1 is pulled out. Then the two adjacent cylinders 1 rotate in the opposite direction again, and the reverse rotation direction this time is opposite to the above-mentioned reverse rotation direction, so that the hook body of the hook plate 6 rotates to the entrance 4 position, and then the two cylinders 1 are moved outward along the axis, the hook plate 6 is separated from the entrance 4, and the two adjacent cylinders 1 are separated; the cooperation between the cylinder 1 and the connecting unit makes it possible for the two adjacent cylinders 1 to be installed together or disassembled and separated without the need for welding operations, which can improve the installation and disassembly efficiency of the cylinder 1, thereby improving the construction efficiency. At the same time, when the ground in the karst area is relatively complex, the installation and disassembly of the cylinder 1 can also be carried out smoothly.

[0059] When the upper cylinder 1 rotates during the crane hoisting, the lower cylinder 1 is difficult to rotate due to the friction between the lower cylinder 1 and the soil, and the upper cylinder 1 rotates, which will cause the hook plate 6 to disengage from the bayonet 5. Once the rotation occurs, the resulting hook plates 6 will all disengage from the bayonet 5, causing the two adjacent cylinders 1 to disengage, resulting in a serious construction accident. For this purpose, a locking ring 8 is provided. When the hook body of the hook plate 6 is placed in the bayonet 5 position, the locking ring 8 is rotated so that the end of the guide bar 9 slides along the slide groove 7 into the inlet 4 position and presses on the plate body of the hook plate 6. Then, the screws are rotated in the fixing holes 10 and the threaded holes 11 in sequence to fix the locking ring 8, so that the end of the guide bar 9 is stably pressed against the hook plate 6, thereby squeezing the hook body of the hook plate 6 stably in the bayonet 5, thereby ensuring the stability between the two adjacent cylinders 1.

[0060] By providing a semi-annular steel plate 12, which is elastic, the steel plate 12 is pressed against the inner wall of the inlet 4 during the process of the hook plate 6 being embedded in the inlet 4, and the hook plate 6 is pressed against the inner wall of the inlet 4 to ensure that the axes of the two adjacent cylinders 1 are pre-fixed in relative rotation when the lock ring 8 is not operated, so as to ensure that when the lock ring 8 is rotated later, the end of the guide bar 9 can be smoothly pressed against the plate body of the hook plate 6, thereby providing safety for the installation of the cylinder 1.

[0061] The locking ring 8 rotates, and the end of the guide bar 9 presses against the plate body of the hook plate 6. At the same time, the guide bar 9 passes through the notch 13 and presses against the plate body. After repeated use, the inner wall of the inlet 4 and the steel plate 12 are squeezed, and the steel plate 12 undergoes irreversible deformation, which causes a gap to remain between the plate body of the hook plate 6 and the inner wall of the inlet 4. The hook plate 6 will detach from the inlet 4. A notch 13 is provided, and the guide bar 9 is embedded in the notch 13 to constrain the relative movement between the guide bar 9 and the steel plate 12, thereby constraining the tendency of the axes of the upper and lower cylinders 1 to separate, and also providing safety for the installation of the cylinder 1.

[0062] By setting the elastic plate 14 and rotating the locking ring 8, the elastic plate 14 passes over the convex portion 15. At this time, the threaded hole 11 is aligned with the fixing hole 10. When the bolt is not screwed into the threaded hole 11, the locking ring 8 is stabilized in advance by the extrusion constraint of the elastic plate 14 and the convex portion 15 to prevent the locking ring 8 from rotating, causing the threaded hole 11 and the fixing hole 10 to be misaligned, thereby affecting the installation of the screw.

[0063] During the process of pulling the cylinder 1 out of the hole in the ground, the friction between the inner wall of the cylinder 1 and the soil will hinder the upward movement of the cylinder 1. For this purpose, a tube 16 with a spray hole 19 is provided; during the process of pulling out the cylinder 1, a hose is used to connect the socket 17 at the upper end surface of the upper cylinder 1, and then gas is pumped in through an air pump. The gas is discharged from the spray hole 19 on the tube 16. A large amount of high-pressure gas forms a layer of air mold between the cylinder 1 and the soil, reducing the friction between the cylinder 1 and the soil, which helps to smoothly execute the upward pulling action of the cylinder 1. At the same time, the lower cylinder 1 is inserted into the socket 17 on the lower cylinder 1 through the insert tube 18 of the upper cylinder 1 to realize the gas transfer, so that the tube 16 on the outer wall of the lower cylinder 1 also sprays gas, which helps to pull the cylinder 1 out.

[0064] The nozzle hole 19 is set in a strip shape to increase the gas discharge area. At the same time, the position of the nozzle hole 19 on the tube body 16 allows the gas to quickly form a layer of air mold between the soil and the cylinder 1, and the air mold layer is relatively stable, which helps to pull out the cylinder 1.

[0065] The cover plate 20 is provided with a cover plate 20, which can cover the upper cylinder 1 to prevent foreign matter such as soil from being mixed into the poured concrete. At the same time, a support rod 22 is provided on the cover plate 20 to cooperate with the window 23. The hoisted wire rope is passed through the window 23, passed around the support rod 22, and then taken out from the window 23, and the wire rope is tied to the support rod 22. As for the cooperation between the cover plate 20 and the cylinder 1, the cover plate 20 is buckled on the upper cylinder 1, and then the support rod 22 is driven so that the end of the support rod 22 passes through the lifting hole 24 on the cylinder 1. At this time, the cover plate 20 is fixed to the cylinder 1, and then the cylinder 1 can be pulled out by the upper body wire rope of the crane. The cover plate 20 can be pulled out of each rotary drilling hole one by one, and there is no need to install the wire rope on the cylinder 1, or remove it from the cylinder 1, which reduces the installation and removal steps of the wire rope and improves efficiency.

[0066] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A deep pile casing connection assembly for a karst area, comprising a casing (1), characterized in that: The cylinder (1) is provided with a connection unit; the connection unit comprises an upper ring (2) and a lower ring (3); the upper ring (2) is welded to the outer ring of the upper end of the cylinder (1), the upper end surface of the upper ring (2) is flush with the upper end surface of the cylinder (1), a plurality of inlets (4) are evenly provided on the outer ring of the upper ring (2), and a bayonet (5) is provided at the lower half of the inlet (4); the lower ring (3) is welded to the outer ring of the lower end of the cylinder (1), the lower end surface of the lower ring (3) is flush with the lower end surface of the cylinder (1), and an L-shaped hook plate (6) is provided on the lower end surface of the lower ring (3); the hook plate (6) provided at the lower end of the upper cylinder (1) of the two adjacent cylinders (1) is rotated along the inlet (4) provided at the upper end of the lower cylinder (1) and embedded in the bayonet (5); The outer ring of the upper ring (2) is provided with a sliding groove (7), the outer ring of the upper ring (2) is provided with a locking ring (8), the inner ring of the locking ring (8) is provided with a guide bar (9), and the guide bar (9) is slidably connected in the sliding groove (7); the surface of the locking ring (8) is provided with a fixing hole (10); the surface of the upper ring (2) is provided with a threaded hole (11), the locking ring (8) is rotated to align the fixing hole (10) with the threaded hole (11), and a bolt is screwed into the fixing hole (10); A semi-annular steel plate (12) is provided on the back of each hook plate (6), the plate body of the hook plate (6) is placed in the inlet (4), and the back of the steel plate (12) is pressed against the inner wall of the inlet (4); A notch (13) is provided on the outer edge of the steel plate (12), and the end of the guide bar (9) slides along the guide groove into the notch (13); The upper end surface of the locking ring (8) is fixedly connected to a plurality of elastic plates (14), and the ends of the elastic plates (14) extend to the upper end surface of the cylinder (1); a convex portion (15) is provided on one side of the inlet (4), and when the locking ring (8) is rotated, the elastic plates (14) pass over the convex portion (15); The upper end surface of the upper ring (2) is provided with an insertion hole (17); a plurality of tubes (16) are evenly provided on the outer wall of the cylinder (1); the upper end of the tube (16) is connected to the insertion hole (17), and the lower end of the tube (16) is connected to the insertion tube (18), and the insertion tube (18) is fixed to the lower end surface of the lower ring (3); the cross section of the tube (16) is semi-elliptical, and a plurality of spray holes (19) are provided on the surface of the tube (16).

2. The karst area deep pile casing connection assembly according to claim 1, characterized in that: The spray holes (19) are in a strip shape and are arranged on both sides of the tube body (16) in a vertical direction and outside the tube body (16) and in the middle of the tube body (16).

3. The karst area deep pile casing connection assembly according to claim 2, characterized in that: The upper end of the cylinder (1) is provided with a lifting auxiliary unit; the lifting auxiliary unit includes a cover plate (20), a plurality of fixed blocks (21) are evenly provided on the lower surface of the cover plate (20), the fixed blocks (21) are arranged in a circular array on the lower surface of the cover plate (20), and a support rod (22) is slidably connected to the fixed block (21), a window (23) is provided on the upper surface of the cover plate (20) at a position opposite to the support rod (22), the cover plate (20) covers the upper end of the cylinder (1), and the end of the support rod (22) is inserted into the lifting hole (24) provided in the inner circle of the upper end of the cylinder (1).

4. The karst area deep pile casing connection assembly according to claim 3, characterized in that: The pulling hole (24) is provided along the inner side wall of the upper end of the cylinder (1) and extends to the interior of the upper ring (2).

5. The karst area deep pile casing connection assembly according to claim 1, characterized in that: The elastic plate (14) is arranged in a wave shape.

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