Bridge pier cast-in-place pile all-casing construction device under complex geology

Abstract

The invention relates to the technical field of cast-in-place pile full-casing construction, and discloses a pier cast-in-place pile full-casing construction device under complex geology, the pier cast-in-place pile full-casing construction device comprises a rotary drilling rig, a base and a conical barrel, the rotary drilling rig is connected with a rotary drilling rig, the rotary drilling rig is connected with a connector through a pin shaft, the connector is connected with a driver through a pin shaft, and the driver is connected with a hydraulic cylinder. The driver is connected with a steel sleeve or a cutter tooth boot, the driver is connected with a connecting frame, rotary cutter teeth are fixedly connected to the lower surface of the cutter tooth boot, heat dissipation holes are formed in the driver, and first connecting holes are formed in the upper side and the lower side of the connector, the driver and the steel sleeve. The large-torque rotary drilling rig is used for being connected with the driver and the steel sleeve, the procedures of sinking and pulling of the steel sleeve and drilling, soil taking, soil unloading and the like in the steel sleeve can be completed, the large-torque rotary drilling rig is suitable for deep and thick stratums containing underground water rich layers, karst caves, quicksand layers, sludge layers and the like and prone to hole collapse, the construction range is widened, and the drilling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of full casing construction technology of bored pile, in particular to a full casing construction device for bridge pier bored pile under complex geology. BACKGROUND

[0002] As a key component of traffic infrastructure, the number of bridges is increasing, and the construction environment is becoming more and more complex. Among many bridge construction projects, bridge pier bored pile is an important form of foundation to ensure the stability and safety of bridge structure. However, the geological conditions faced in actual construction are different, and there are rich groundwater layer, karst cave, quicksand layer, silt layer and other deep collapsible hole strata in many areas.

[0003] At present, in the deep collapsible hole stratum of foundation pit, the long casing is usually sunk to protect the wall, and the casing is passed through the collapsible hole stratum to ensure the stability of the hole wall. There are mainly three construction methods of traditional long casing, that is, using full casing full rotary drilling machine to drill pile and lower long casing, cooperating with grab bucket to take soil and drill; using full casing full rotary drilling machine to drill pile and lower long casing, cooperating with rotary drilling machine to take soil, and using vibration hammer to sink super-long casing, and then using rotary drilling machine to take soil. The above three methods need two large equipment to cooperate with each other, the process is complex, the drilling efficiency is low, and the collapsible hole may occur in silt layer and other complex underground. SUMMARY

[0004] In view of the shortcomings of the prior art, the present application provides a full casing construction device for bridge pier bored pile under complex geology, which solves the problems of traditional method needing two large equipment to cooperate with each other, complex process and low drilling efficiency.

[0005] To achieve the above purpose, the present application realizes a full casing construction device for bridge pier bored pile under complex geology by the following technical scheme, which comprises a rotary drilling machine, a base and a conical barrel. The rotary drilling machine is connected with a rotary drilling frame. The rotary drilling frame is connected with a connector through a pin shaft. The connector is connected with a driver through a pin shaft. The driver is connected with a steel casing or a cutter shoe. The driver is connected with a connecting frame. The lower surface of the cutter shoe is fixedly connected with a rotary cutter. The driver is provided with a heat dissipation hole. The connector, the driver and the steel casing are provided with connecting holes one on the upper and lower sides. The upper side of the cutter shoe is provided with a connecting hole one. The upper side of the connector, the driver, the steel casing and the cutter shoe is provided with a limiting block. The lower side of the connector, the driver and the steel casing is provided with a limiting groove corresponding to the limiting block.

[0006] The above solution involves connecting a rotary drilling rig to a specific structure, using a driver to transmit torque and pressure, and converting electrical energy into mechanical energy. Connecting the components is achieved with connecting holes and limit blocks. The driver supports the connecting frame for telescopic drilling and soil extraction. Only one high-torque rotary drilling rig, connected to the driver and steel casing, is needed to complete the processes of lowering and pulling the steel casing, drilling, soil extraction, and unloading. This solution is suitable for various deep and easily collapsible strata and improves drilling efficiency.

[0007] Preferably, when the driver is connected to the steel sleeve, the lower pin of the steel sleeve is connected to the toothed boot.

[0008] Preferably, a drill rod is attached to the lower surface of the connecting frame, a spline shaft is fixedly connected to the top of the drill rod, adjacent spline shafts are slidably connected to the lower interior of the drill rod and the connecting frame, and a threaded soil sampling plate is fixedly connected to the outer wall of the drill rod.

[0009] Preferably, the splined shaft has a second connecting hole, and a connecting pin is provided inside the splined shaft. The connecting pin passes through the connecting frame or the drill rod and is connected inside the second connecting hole.

[0010] Preferably, the upper surface of the base is provided with at least one locking mechanism and a second locking mechanism.

[0011] Preferably, the locking mechanism includes a locking screw and a limiting protrusion. The locking screw is threadedly connected to the base, and the limiting protrusion is fixedly connected to the outer wall of the steel sleeve. The locking screw fits against the limiting protrusion.

[0012] Preferably, the second locking mechanism includes a cam, which is rotatably connected to the base, and a crank is fixedly connected to the outer wall of the cam.

[0013] Preferably, the conical barrel has slurry inlet holes on both lower sides, and the outer walls of both sides of the conical barrel are fixedly connected with sliding grooves. Sliding plates are slidably connected inside the sliding grooves. The sliding plates are located outside the slurry inlet holes, and a filter plate is installed on one side.

[0014] Preferably, the conical barrel is fixedly connected to a handle, the upper surface of the slide plate is fixedly connected to a connecting plate, and both the handle and the connecting plate are connected to a suspension rope.

[0015] Preferably, a bracket is fixedly connected to the upper surface of the base, a rotating frame is rotatably connected to the bracket, a pulley is provided on the outer wall of the rotating frame, the pulley is connected to the hanging rope on the handle, a limit hole is opened in the bracket, a limit pin is provided inside the rotating frame, and the limit pin passes through the bracket and is connected inside the limit hole.

[0016] Working principle: Remove the lower pressure plate of the rotary drilling rig power head, connect the connector to the power head with a pin, and then connect the driver to the connector pin so that the power head can transmit downward pressure and torque without affecting the extension and retraction of the drill rod and the soil extraction of the rotary drill bit. Based on the measured and laid-out pile position, test assemble the first section of steel casing to ensure a tight connection. Once the rotary drilling rig is in place, align the center of the cutting teeth and boots with the center of the pile location and begin drilling. Determine the drilling depth, connect the first section of the steel casing to the driver and lower it. Adjust the verticality and then rotate and pressurize to sink it. When about 1m is exposed, extend the steel casing. Repeat the operation until the appropriate depth is reached. If the sinking of the steel casing is obstructed, use the drill rod to remove soil from inside the casing. If necessary, use a long steel hook to move the connecting pin. The surveyor ties the hoisting rope, lowers the conical bucket to the bottom of the hole and holds it for 40 seconds to control the seepage coefficient. After lifting it out, the thickness of the sediment is read according to the scale line. The slide plate is opened to pour out the sediment. The rotating frame can also be erected to assist the hoisting rope work. After the concrete is poured, separate the drive unit from the steel casing, pull up the steel casing at the borehole opening, connect and secure it to the casing using a connector, and use the torque output from the rotary drilling rig's power head to rotate the connector and pull up the steel casing. Secure the extra-long steel casing to prevent it from sinking, loosen the connecting pin to separate the steel casing, move it to a suitable position, and repeat the operation to complete the circulating flow operation.

[0017] This invention provides a complete casing construction device for bridge pier cast-in-place piles under complex geological conditions. It has the following beneficial effects: 1. This invention uses only one high-torque rotary drilling rig connected to the driver and steel casing to complete the sinking and pulling of the steel casing, as well as drilling, soil extraction and unloading inside the steel casing. It is suitable for deep, easily collapsible strata such as those containing rich groundwater layers, karst caves, quicksand layers, and silt layers, thus expanding the construction range and improving drilling efficiency.

[0018] 2. In the slag removal process of this invention, a conical bucket is used. The conical bucket is lowered by the hoisting rope on the handle, and the hoisting rope on the connecting plate is pulled to drive the sliding plate to control the opening and closing of the grout inlet. The filter plate installed on one side can filter water and can simultaneously measure and remove the sediment at the bottom of the pile. A bracket and a rotating frame are added to the upper surface of the base. When using the conical bucket, the rotating frame is rotated to raise it upright. The pulley on the rotating frame assists the hoisting rope to facilitate slag removal.

[0019] 3. The base of the present invention is provided with at least one locking mechanism and one locking mechanism, which can be used to fix the steel sleeve when it is pulled out to prevent the steel sleeve from falling off; multiple sets of locking mechanisms can also be provided, which can be used individually or in combination to enhance the fixing effect. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the base structure of the present invention; Figure 3This is a schematic diagram of the conical barrel structure of the present invention; Figure 4 This is a schematic diagram of a partial structure of the driver of the present invention; Figure 5 This is a schematic diagram of a partial structure of the drill pipe of the present invention; Figure 6 This is a partial structural diagram of the spline shaft of the present invention; Figure 7 This is a partial structural diagram of the pulley of the present invention; Figure 8 This is a schematic diagram of the internal structure of the conical barrel of the present invention.

[0021] The components include: 1. Rotary drilling rig; 2. Rotary drilling frame; 3. Connector; 4. Driver; 5. Steel casing; 6. Cutting tooth shoe; 7. Heat dissipation hole; 8. Base; 9. Conical barrel; 10. Connection hole one; 11. Limiting block; 12. Rotary cutting tooth; 13. Connecting frame; 14. Drill rod; 15. Threaded soil sampling plate; 16. Splined shaft; 17. Connection hole two; 18. Connecting pin; 19. Locking mechanism one; 191. Locking screw; 192. Limiting protrusion; 20. Locking mechanism two; 201. Cam; 202. Crank handle; 21. Handle; 22. Slide groove; 23. Slide plate; 24. Connecting plate; 25. Filter plate; 26. Support; 27. Rotating frame; 28. Pulley; 29. ​​Limiting hole; 30. Limiting pin. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 - Appendix Figure 4 This invention provides a complete casing construction device for bridge pier cast-in-place piles under complex geological conditions, including a rotary drilling rig 1, a base 8, and a conical barrel 9. The rotary drilling rig 1 is connected to a rotary drilling frame 2. The rotary drilling frame 2 is pin-connected to a connector 3, the connector 3 is pin-connected to a driver 4, the driver 4 is connected to a steel casing 5 or a toothed boot 6, the driver 4 is connected to a connecting frame 13, the lower surface of the toothed boot 6 is fixedly connected to rotary cutting teeth 12, the driver 4 is provided with heat dissipation holes 7, the connector 3, the driver 4, and the steel casing 5 are all provided with connection holes 10 on the upper and lower sides, the toothed boot 6 is provided with a connection hole 10 on the upper side, the upper outer wall of the connector 3, the driver 4, the steel casing 5, and the toothed boot 6 is provided with a limiting block 11, and the lower side of the connector 3, the driver 4, and the steel casing 5 is provided with a limiting groove corresponding to the limiting block 11.

[0024] Specifically, in this application, the rotary drilling rig 1 provides power and support. It requires a connector 3 to connect the rotary drilling rig 1 and the rotary drilling frame 2. The connector 3 is connected to the driver 4 via a pin. The driver 4 facilitates the overall structural transition and transmits the torque and pressure of the rotary drilling rig 1. The driver 4 can convert electrical energy into mechanical energy to provide stronger downward pressure. The driver 4 drives the steel casing 5 and the cutting tooth shoe 6 to rotate. During connection, due to the presence of a connection hole 10 and a limiting block 11, the connector 3 can be connected to the driver 4. The driver 4 is then connected to... The steel casing 5 and the cutting toothed shoe 6 are connected, and the connecting frame 13 is supported by the driver 4 for telescopic movement. For example, the combination of bearing group + guide sleeve in the prior art is used. The 13 is powered by the 1 or other power settings to drill and remove soil. This is a technology that can be achieved by the prior art. This application only uses one high torque rotary drilling rig 1, connected to the driver 4 and the steel casing 5, to complete the sinking and pulling of the steel casing 5, as well as the drilling, soil removal and unloading processes in the steel casing 5. It is suitable for deep and easily collapsed strata such as those containing rich groundwater layers, karst caves, quicksand layers, and silt layers.

[0025] Please see the appendix Figure 4 When the driver 4 is connected to the steel sleeve 5, the lower pin of the steel sleeve 5 is connected to the toothed boot 6.

[0026] Specifically, the driver 4 can be directly connected to the toothed boot 6, or it can be connected to the steel sleeve 5 first, and then the steel sleeve 5 is connected to the toothed boot 6. The steel sleeve 5 is modularly designed, and the number of steel sleeves 5 can be increased according to the length of use.

[0027] Please see the appendix Figure 5 - Appendix Figure 6 The lower surface of the connecting frame 13 is fitted with a drill rod 14, the top end of the drill rod 14 is fixedly connected to a spline shaft 16, the drill rod 14 and the lower inner side of the connecting frame 13 are slidably connected to adjacent spline shafts 16, and the outer wall of the drill rod 14 is fixedly connected to a threaded soil sampling plate 15.

[0028] Specifically, when the driver 4 is connected to the connecting frame 13, it can drive the connecting frame 13 to rotate. The connecting frame 13 drives the drill rod 14 to rotate, thereby driving the threaded soil sampling plate 15 to rotate for soil sampling. A spline shaft 16 is added to the top of the drill rod 14. When it is necessary to increase the length of the drill rod 14, the uppermost connecting frame 13 can be separated from the drill rod 14 first, and the new drill rod 14 can be inserted into the lower drill rod 14 to increase its length.

[0029] Please see the appendix Figure 6 The spline shaft 16 has a second connecting hole 17, and a connecting pin 18 is provided inside the spline shaft 16. The connecting pin 18 passes through the connecting bracket 13 or the drill rod 14 and is connected to the inside of the second connecting hole 17.

[0030] Specifically, the connection between drill rods 14 and the connection between drill rod 14 and connecting frame 13 are achieved through connecting pin 18. That is, the connecting pin 18 is inserted into the connection hole 17 and locked in place, thereby connecting drill rods 14 and connecting frame 13.

[0031] Please see the appendix Figure 2 The upper surface of the base 8 is provided with at least one locking mechanism 19 and locking mechanism 20.

[0032] Specifically, when it is necessary to pull out the steel sleeve 5, it is fixed by the locking mechanism 19 or locking mechanism 20 on the upper side of the base 8 to prevent it from falling. Multiple sets of locking mechanisms 19 and 20 can be set on the upper side of the base 8, which can be used individually or in combination.

[0033] Please see the appendix Figure 2 and attached Figure 7 The locking mechanism 19 includes a locking screw 191 and a limiting protrusion 192. The locking screw 191 is threadedly connected to the base 8, and the limiting protrusion 192 is fixedly connected to the outer wall of the steel sleeve 5. The locking screw 191 and the limiting protrusion 192 are in contact.

[0034] Specifically, the locking mechanism 19 is fixed by the locking screw 191. When the locking screw 191 is pressed against the steel sleeve 5, the locking screw 191 is located on the lower side of the limiting protrusion 192, thereby preventing the steel sleeve 5 from falling.

[0035] Please see the appendix Figure 2 and attached Figure 7 The locking mechanism 20 includes a cam 201, which is rotatably connected to the base 8, and a rocker arm 202 is fixedly connected to the outer wall of the cam 201.

[0036] Specifically, the locking mechanism 20 fixes the steel sleeve 5 through the cam 201. When the rocker arm 202 is turned, it drives the cam 201 to rotate. The base 8 can support the rotation of the cam 201. Due to the eccentric setting of the cam 201, when the cam 201 rotates, it can press against the steel sleeve 5 by squeezing and friction.

[0037] Please see the appendix Figure 3 and attached Figure 8 The conical barrel 9 has slurry inlet holes on both sides of its lower part. The outer walls of both sides of the conical barrel 9 are fixedly connected with sliding grooves 22. The sliding plate 23 is slidably connected inside the sliding grooves 22. The sliding plate 23 is located outside the slurry inlet holes, and a filter plate 25 is installed on one side. The conical barrel 9 is fixedly connected with a handle 21. The upper surface of the sliding plate 23 is fixedly connected with a connecting plate 24. Both the handle 21 and the connecting plate 24 are connected with lifting ropes.

[0038] Specifically, during the slag removal process, a conical bucket 9 is used for slag removal. The conical bucket 9 is lowered by the hoisting rope on the handle 21. After it is lowered, the hoisting rope on the connecting plate 24 can be pulled to drive the sliding plate 23 to slide. The sliding groove 22 supports the sliding plate 23. The sliding of the sliding plate 23 can control the opening and closing of the grout inlet hole. The filter plate 25 can filter water on one side. Simultaneously, the slag at the bottom of the pile can be measured and removed, thus achieving the effects of high construction efficiency, good pile quality, and low overall cost.

[0039] Please see the appendix Figure 7 A bracket 26 is fixedly connected to the upper surface of the base 8. A rotating frame 27 is rotatably connected to the bracket 26. A pulley 28 is provided on the outer wall of the rotating frame 27. The pulley 28 is connected to the hanging rope on the handle 21. A limit hole 29 is provided in the bracket 26. A limit pin 30 is provided inside the rotating frame 27. The limit pin 30 passes through the bracket 26 and is connected inside the limit hole 29.

[0040] Specifically, a bracket 26 and a rotating frame 27 can be added to the upper surface of the base 8. When using the conical bucket 9, the rotating frame 27 can be rotated to stand it up. The pulley 28 on the rotating frame 27 assists in the hoisting rope, making it easy to clean the slag. When the rotating frame 27 is not needed, it can be rotated to lay it down on one side to avoid interfering with subsequent work. Furthermore, the rotation of the rotating frame 27 can be fixed by the limiting pin 30 and the limiting hole 29. When the limiting pin 30 passes through the bracket 26 and is inserted into the interior of the rotating frame 27, the rotating frame 27 cannot rotate. The limiting hole 29 is opened on the bracket 26 to correspond to the two states of the rotating frame 27.

[0041] This embodiment describes a complete casing construction device for bridge pier cast-in-place piles in complex geological conditions. First, the lower pressure plate of the power head of the rotary drilling rig 1 is removed. Connector 3 is then connected to the power head of the rotary drilling rig 1 using a pin connection. Connector 3 is also connected to the driver 4 using a pin connection. The power head transmits downward pressure and torque through connector 3 and driver 4. Installing connector 3 and driver 4 does not affect the extension and retraction of the drill rod 14 or the rotation of the rotary drilling bit's threaded soil-collecting plate 15 for soil collection. The operator manipulates the rotary drilling rig 1 to slowly lower driver 4 into the steel casing 5. After adjusting driver 4 and aligning its lower positioning groove with the limiting block 11 of the steel casing 5, driver 4 is lowered again, completing the connection between driver 4 and steel casing 5. This connection is then secured using a connecting pin.

[0042] Based on the surveyed and laid-out pile positions, when the rotary drilling rig 1 is in place, the vertical projection of the rig body, the vertical projection of the drill rod 14, and the pile position should be at the same point. After the drilling rig is in place, the first section of steel casing 5 should be test-assembled, and the connection of the steel casing 5 should be tight. When using the cutter tooth shoe 6 for drilling, align the center of the cutter tooth shoe 6 with the center point of the pile position, lower the cutter tooth shoe 6 to the ground, rotate and press down the cutter tooth shoe 6 to begin drilling, and the drilling depth should be based on the premise that the borehole opening does not collapse.

[0043] Connect the first section of steel casing 5 to the driver 4. Slowly lower the steel casing 5, connected to the cutting tooth shoe 6, into the pre-drilled hole. Adjust the verticality of the steel casing 5 using the power head of the rotary drilling rig 1, and confirm that the verticality meets the requirements. Rotate the power head of the rotary drilling rig 1, rotate the driver 4, and apply pressure. The steel casing 5 begins to cut into the soil and sink. To facilitate the extension of the steel casing 5, stop sinking when the first section of steel casing 5 has sunk to about 1m above the exposed ground, and begin extending the steel casing 5. Turn the connecting pin of the driver 4 clockwise to unlock the driver 4 from the steel casing 5, and lift the driver 4. Connect the driver 4 to the other section of steel casing 5. Move the rotary drilling rig 1 above the first section of steel casing 5, adjust the power head so that the positioning groove below the steel casing 5 inserts into the upper limit block 11 of the first section of steel casing 5, and slowly lower it. After the two sections of steel casing 5 are connected and the pin is installed, first manually tighten it with a wrench, and then tighten it with an electric wrench. After the steel casing 5 is connected, rotate the power head of the rotary drilling rig 1, rotate and press down to sink the steel casing 5. When the top of the steel casing 5 is about 1m from the ground, stop sinking and repeat the steps of extending the steel casing 5.

[0044] As the steel casing 5 continues to sink, the frictional resistance on the steel casing 5 increases. When the steel casing 5 can no longer be sunk, the drill rod 14 is used to remove soil from inside the steel casing 5. After the drill rod 14 has removed soil, all the connecting pins of the drive unit 4 are turned counterclockwise to separate the drive unit 4 from the steel casing 5, and the drive unit 4 is lifted. When the connection between the drive unit 4 and the steel casing 5 is at a high position and cannot be turned by hand, a long steel hook can be used to turn the connecting pins. The rotary drilling rig 2 extends the drill rod 14 of the rotary drilling rig 1 and uses the drill rod 14 to remove soil from inside the steel casing 5, which is then unloaded into a spoil bin for temporary storage.

[0045] The surveyor secures a rope to the handle and slowly lowers the conical barrel 9 to the bottom of the borehole, where it remains for 40 seconds to trap sediment. With the slide plate 23 closed, the permeability coefficient is controlled at approximately 0.008 m / min. The conical barrel 9 is then lifted out, and the sediment thickness is read according to the markings on the barrel. After reading the thickness, the slide plate 23 is opened, and the sediment is emptied from the barrel. This process is repeated.

[0046] The rotating frame 27 can be erected and fixed by the limiting hole 29 and the limiting pin 30, and the rotating frame 27 can be used to assist the hanging rope in operation.

[0047] After the concrete pouring is completed, the steel casing 5 is pulled out. Before pulling out the steel casing 5, the drive 4 of the rotary drilling rig 1 is separated from the steel casing 5 and slowly lowered from above the steel casing 5 to pull out the steel casing 5 at the borehole opening. The rotary drilling rig 1 is positioned, aligned with the center of the steel casing 5, and the connector is lowered to connect with the steel casing 5 at the borehole opening and secured with a pin. The torque output of the rotary drilling rig's power head causes the connector to rotate, while simultaneously applying an upward pulling force to gradually pull the steel casing 5 out of the borehole opening. When the upper section of the steel casing 5 is completely pulled out and the lower section of the steel casing 5 is pulled out about 1m above the ground, the locking screw 191 is turned clockwise and engages the limiting protrusion 192 welded to the steel casing 5; the crank handle 202 is raised, and the cam 201 clamps the steel casing 5, working together with the locking screw 191 to fix the extra-long steel casing 5 inside the hole and prevent the steel casing 5 from sinking. Use a high-pressure water gun to flush the pin holes, loosen the connecting pins symmetrically and one by one, and separate the two sections of steel casing 5. Raise the drive unit 4; once the upper and lower sections of steel casing 5 are completely separated, start the rotary drilling rig 1 to move the first section of steel casing 5 to the side of the pile location or the next pile hole. Repeat the above steps to pull out all the steel casing 5 and the cutting tooth shoe 6. After pulling out the cutting tooth shoe 6, move it to the next construction pile location. After confirming that the pile location and verticality meet the requirements, apply pressure and rotate it into the soil. The rotary drilling rig 1 continues to pull out the remaining steel casing 5 and sink it into the next pile, completing the cyclical operation.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A complete casing construction device for bridge pier cast-in-place piles under complex geological conditions, comprising a rotary drilling rig (1), a base (8), and a conical barrel (9), wherein the rotary drilling rig (1) is connected to a rotary drilling frame (2), characterized in that, The rotary drilling rig (2) is connected to a connector (3) by a pin. The connector (3) is connected to a driver (4) by a pin. The driver (4) is connected to a steel sleeve (5) or a toothed boot (6). The driver (4) is connected to a connecting frame (13). The lower surface of the toothed boot (6) is fixedly connected to a rotary cutting tooth (12). The driver (4) has a heat dissipation hole (7). The connector (3), driver (4), and steel sleeve (5) all have a connection hole (10) on their upper and lower sides. The toothed boot (6) has a connection hole (10) on its upper side. The upper outer wall of the connector (3), driver (4), steel sleeve (5), and toothed boot (6) is provided with a limit block (11). The lower side of the connector (3), driver (4), and steel sleeve (5) is provided with a limit groove corresponding to the limit block (11).

2. The complete casing construction device for bridge pier cast-in-place piles under complex geological conditions according to claim 1, characterized in that, When the driver (4) is connected to the steel sleeve (5), the lower pin of the steel sleeve (5) is connected to the toothed boot (6).

3. The complete casing construction device for bridge pier cast-in-place piles under complex geological conditions according to claim 1, characterized in that, The lower surface of the connecting frame (13) is fitted with a drill rod (14), the top end of the drill rod (14) is fixedly connected with a spline shaft (16), the drill rod (14) and the lower inner side of the connecting frame (13) are slidably connected with adjacent spline shafts (16), and the outer wall of the drill rod (14) is fixedly connected with a threaded soil sampling plate (15).

4. The complete casing construction device for bridge pier cast-in-place piles under complex geological conditions according to claim 3, characterized in that, The spline shaft (16) has a second connecting hole (17), and a connecting pin (18) is provided inside the spline shaft (16). The connecting pin (18) passes through the connecting frame (13) or the drill rod (14) and is connected inside the second connecting hole (17).

5. The complete casing construction device for bridge pier cast-in-place piles under complex geological conditions according to claim 1, characterized in that, The upper surface of the base (8) is provided with at least one locking mechanism one (19) and a locking mechanism two (20).

6. The complete casing construction device for bridge pier cast-in-place piles under complex geological conditions according to claim 5, characterized in that, The locking mechanism (19) includes a locking screw (191) and a limiting protrusion (192). The locking screw (191) is threadedly connected to the base (8). The limiting protrusion (192) is fixedly connected to the outer wall of the steel sleeve (5). The locking screw (191) and the limiting protrusion (192) are in contact.

7. The complete casing construction device for bridge pier cast-in-place piles under complex geological conditions according to claim 5, characterized in that, The second locking mechanism (20) includes a cam (201), which is rotatably connected to the base (8), and a rocker arm (202) is fixedly connected to the outer wall of the cam (201).

8. The complete casing construction device for bridge pier cast-in-place piles under complex geological conditions according to claim 1, characterized in that, The conical barrel (9) has slurry inlet holes on both sides of its lower part. The outer walls of both sides of the conical barrel (9) are fixedly connected with sliding grooves (22). The sliding grooves (22) are slidably connected with sliding plates (23). The sliding plates (23) are located outside the slurry inlet holes, and a filter plate (25) is installed on one side.

9. The complete casing construction device for bridge pier cast-in-place piles under complex geological conditions according to claim 8, characterized in that, The conical barrel (9) is fixedly connected to a handle (21), and the upper surface of the slide plate (23) is fixedly connected to a connecting plate (24). Both the handle (21) and the connecting plate (24) are connected to a hanging rope.

10. The complete casing construction device for bridge pier cast-in-place piles under complex geological conditions according to claim 9, characterized in that, A bracket (26) is fixedly connected to the upper surface of the base (8). A rotating frame (27) is rotatably connected to the bracket (26). A pulley (28) is provided on the outer wall of the rotating frame (27). The pulley (28) is connected to the hanging rope on the handle (21). A limit hole (29) is opened in the bracket (26). A limit pin (30) is provided inside the rotating frame (27). The limit pin (30) passes through the bracket (26) and is connected inside the limit hole (29).

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