Pile foundation construction equipment and method for low-clearance complex geological environment

Abstract

The application discloses a pile foundation construction equipment and method for a low-clearance complex geological environment, and relates to the technical field of pile foundation construction equipment.The equipment comprises a mast, a rotary drilling assembly and a synchronous slag discharging assembly.The rotary drilling assembly is arranged on one side of the mast, and comprises a drill rod, a drill bit, a rotary driving part and a steel wire rope traction part.The drill rod is rotatably arranged on one side of the mast, the drill bit is fixedly connected with the lower end of the drill rod, the rotary driving part is slidably connected with the drill rod and used for driving the drill rod to rotate, and the steel wire rope traction part is arranged on the upper end of the drill rod and used for moving and traction of the drill rod.The synchronous slag discharging assembly is arranged in the drill rod, and comprises a rotating rod, a spiral conveying blade, a plurality of crushing blades, a linkage part and a jet-type slag discharging part.The rotating rod is rotatably arranged in the drill rod.The application has the effect of improving the efficiency of pile foundation rotary drilling construction.

Description

Technical Field

[0001] This application relates to the field of pile foundation construction equipment technology, and in particular to a pile foundation construction equipment and method for complex geological environments with low headroom. Background Technology

[0002] With the advancement of urban renewal and infrastructure upgrades, more and more pile foundation construction scenarios are facing the problem of limited clearance. Low clearance fully hydraulic rotary drilling rigs are pile foundation construction equipment designed specifically for environments with limited construction height. They are usually composed of a chassis, drill rod, slewing mechanism, auxiliary winch mechanism, power mechanism and control system.

[0003] In existing technologies, low-headroom fully hydraulic rotary drilling rigs commonly use a method of repeatedly lifting the drill rod to remove slag during practical applications. This method cannot simultaneously remove waste slag during the rotary drilling process. This not only reduces construction efficiency, but also increases the risk of pile foundation hole collapse due to repeated lifting of the drill rod (especially in areas with relatively soft geology). Furthermore, if waste slag is not removed in time, it is easy to accumulate between the drill barrel and the hole wall, causing the drill bit to be buried or the hole wall to narrow and jam. As a result, the actual application effect of low-headroom fully hydraulic rotary drilling rigs is poor. Summary of the Invention

[0004] To address the problem that existing low-headroom fully hydraulic rotary drilling rigs cannot remove slag during drilling, this application provides a pile foundation construction equipment and method for complex geological environments with low headroom.

[0005] This application provides a pile foundation construction equipment and method for complex geological environments with low headroom, adopting the following technical solution: A pile foundation construction equipment for complex geological environments with low headroom includes: a mast, a rotary drilling assembly, and a synchronous slag removal assembly. The rotary drilling assembly is disposed on one side of the mast and includes a drill rod, a drill bit, a rotary drive component, and a wire rope traction component. The drill rod is rotatably disposed on one side of the mast, the drill bit is fixedly connected to the lower end of the drill rod, the rotary drive component is slidably connected to the drill rod and is used to drive the drill rod to rotate, and the wire rope traction component is disposed at the upper end of the drill rod and is used to move and pull the drill rod. The synchronous slag removal assembly is disposed inside the drill rod and includes a rotating rod, a spiral conveying blade, multiple sets of crushing blades, a linkage component, and a jet-type slag removal component. The rotating rod is rotatably disposed inside the drill rod, the spiral conveying blade and multiple sets of crushing blades are fixedly sleeved on the outside of the rotating rod, and the multiple sets of crushing blades are disposed inside the drill bit. The linkage component is used to drive the rotating rod to rotate and link with the drill rod, and the jet-type slag removal component is configured in conjunction with the rotating rod to jet slag removal water into the drill bit.

[0006] By adopting the above technical solution, during operation, a rotary drive component drives the drill rod to rotate for rotary drilling in the pile foundation construction area. A wire rope traction component moves and pulls the drill rod, ensuring the stability of the rotary drilling hole. Simultaneously, during rotary drilling, a rotating rod drives the spiral conveyor blades and multiple sets of crushing blades to crush and lift the waste generated during rotary drilling. Furthermore, a jet-type wastewater discharge component sprays out a flow of water, causing the waste to mix with the water to form mud, which is then extracted for waste removal.

[0007] Optionally, the rotary drilling assembly further includes a limiting connector and multiple sets of limiting bosses. The limiting connector is rotatably connected to the upper end of the drill rod, and the multiple sets of limiting bosses are fixedly disposed on the outside of the drill rod.

[0008] By adopting the above technical solution, the limiting connector limits the drill pipe assembly, facilitating the wire rope traction component to control the sliding drive of the drill pipe by traction of the limiting connector. Multiple sets of limiting bosses limit the rotation of the drill pipe.

[0009] Optionally, the rotary drive component includes a rotating support, a lifting hydraulic cylinder, a rotary drive element, a drive gear, a transmission gear, and a drive motor. The rotating support is slidably connected to the mast, the lifting hydraulic cylinder is fixedly connected to the mast, and the telescopic end of the lifting hydraulic cylinder is fixedly connected to the rotating support.

[0010] By adopting the above technical solution, during use, the lowering limit of the drill bit and drill rod is adjusted by driving the rotating support to slide through the telescopic end of the lifting hydraulic cylinder.

[0011] Optionally, the rotary drive component is rotatably mounted inside the rotary support, the drive gear is fixedly sleeved on the outside of the rotary drive component, the transmission gear is located on one side of the drive gear and meshes with the drive gear, the drive motor is fixedly mounted on one side of the rotary drive component, and the output shaft of the drive motor is fixedly connected to the transmission gear.

[0012] By adopting the above technical solution, during use, the operation of the drive motor is controlled to drive the transmission gear to rotate, so that the rotary drive component can rotate under the meshing action of the transmission gear and the drive gear, and the rotation of the rotary drive component drives the drill rod to rotate synchronously.

[0013] Optionally, the wire rope traction component includes a winch, a wheel frame, a pair of guide wheels, and a traction rope. The winch is fixedly mounted on one side of the mast, the wheel frame is fixedly mounted on the upper side of the mast, and both guide wheels are rotatably connected to the wheel frame. One end of the traction rope is wound around the outside of the winch, and the other end of the traction rope is fixedly connected to a limiting connector.

[0014] By adopting the above technical solution, the winding and releasing states of the traction rope can be controlled by controlling the rotation state of the winch. When the traction rope is in the releasing state, it can guide the drill rod and drill bit to move downwards; when the traction rope is in the winding state, it can lift the drill rod and drill bit.

[0015] Optionally, the upper end of the rotating rod is provided with a limiting connector, the number of crushing blades is 3 to 6 sets, and the length of the multiple sets of crushing blades increases progressively from bottom to top.

[0016] By adopting the above technical solution, the waste residue inside the drill bit can be crushed by multiple sets of crushing blades rotating with the rotating rod, which facilitates the subsequent discharge of the waste residue.

[0017] Optionally, the linkage component includes a synchronizing gear, a linkage gear, a pair of reversing gears, and a partition. The synchronizing gear is fixedly sleeved on the outside of the rotating rod, the linkage gear is sleeved on the outside of the synchronizing gear and fixedly connected to the inner wall of the drill rod, the pair of reversing gears are disposed between the synchronizing gear and the linkage gear, and the reversing gear meshes with the synchronizing gear and the linkage gear, and the partition is disposed below the synchronizing gear and fixedly connected to the inner wall of the drill rod.

[0018] By adopting the above technical solution, during use, the linkage gear rotates synchronously with the rotation of the drill rod. At the same time, the synchronous gear rotates in the opposite direction to the rotation of the drill rod under the meshing action of the reversing gear and the linkage gear.

[0019] Optionally, the jetting slag discharge component includes a water-filling connector, a positioning cone, multiple rotary drilling jet holes, and multiple slag discharge jet holes. The rotating rod is a hollow rod-shaped component with open ends. The water-filling connector is rotatably connected to the upper end of the rotating rod, and the positioning cone is fixedly connected to the lower end of the rotating rod. Multiple rotary drilling jet holes and multiple slag discharge jet holes are provided on the outer side of the positioning cone.

[0020] By adopting the above technical solution, water is filled into the rotating rod through the water filling connector. The cooperation between the rotating rod and the positioning cone can not only guide the drill bit in rotary drilling, but also guide the water flow.

[0021] Optionally, the jet-type slag discharge component further includes a guide pipe and a pair of slag discharge pipes. The guide pipe is disposed above the limiting connector. The guide pipe has one liquid inlet and two liquid outlets. One end of the pair of slag discharge pipes is connected to the two liquid outlets of the guide pipe, and the other end of the pair of slag discharge pipes passes through the partition.

[0022] By adopting the above technical solution, it is convenient to subsequently extract the waste mud above the drill pipe by extracting waste liquid through the guide pipe.

[0023] This invention also provides a pile foundation construction method for complex geological environments with low clearance, including the pile foundation construction equipment for complex geological environments with low clearance as described above, and further including the following steps: S1. Construction preparation: Clear the construction area and move the pile foundation construction equipment to the construction area. S2. Equipment debugging: Adjust the mast from a horizontal to a vertical position, and position the drill bit according to the location of the pile foundation; S3. Rotary drilling: By controlling the winch to release the traction rope, the drill rod and drill bit fall vertically along the rotary drive under the action of gravity until the drill bit contacts the ground. At the same time, by controlling the operation of the drive motor, the drill rod can rotate under the action of the rotary drive, drive gear and transmission gear. And by using the lifting hydraulic cylinder to press down the rotating support, the drill bit is in the rotary drilling state. S4. Synchronous slag discharge: When the drill rod rotates, the rotating rod rotates in the opposite direction under the action of the synchronous gear, the linkage gear and a pair of reversing gears. By driving the spiral conveying blades and multiple sets of crushing blades to rotate synchronously through the rotating rod, the waste slag generated during the rotary drilling process can be crushed and vertically lifted. S5. Simultaneously, water is filled into the rotating rod through the water filling connector. The water flow is transported into the positioning cone under the action of the rotating rod and discharged along multiple rotary drilling jet holes and slag discharge jet holes. By using multiple rotary drilling jet holes and slag discharge jet holes to spray water at an angle downwards or upwards respectively, the crushed waste slag in the drill bit is formed into mud, which is convenient for subsequent mud extraction through the slag discharge pipe to remove slag from the drill rod.

[0024] In summary, the embodiments of the present invention provide a pile foundation construction equipment and method for complex geological environments with low headroom, including at least one of the following beneficial technical effects: 1. By setting up a synchronous slag discharge component, the waste slag generated during rotary drilling can be discharged synchronously without the need to repeatedly lift the drill rod, which reduces the risk of pile foundation hole collapse caused by repeated lifting of the drill rod and improves the performance of low headroom fully hydraulic rotary drilling rigs. 2. By adopting a method of simultaneous rotary drilling and slag removal, the problem of drill bit jamming caused by waste slag accumulation is avoided, which significantly improves the efficiency of pile foundation construction. Attached Figure Description

[0025] Figure 1 A structural schematic diagram of a pile foundation construction equipment for complex geological environments with low headroom, provided as an embodiment of the present invention; Figure 2 A cross-sectional view of a pile foundation construction equipment for complex geological environments with low headroom, provided as an embodiment of the present invention; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 for Figure 2 Enlarged view of the structure at point B in the middle; Figure 5 for Figure 2 Enlarged view of the structure at point C; Figure 6 A cross-sectional view of a linkage component in a pile foundation construction equipment for complex geological environments with low headroom, provided as an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a synchronous slag removal component in a pile foundation construction equipment for complex geological environments with low headroom, provided as an embodiment of the present invention; Figure 8 for Figure 7 Enlarged view of the structure at point D; Figure 9 A schematic diagram of the construction state structure of a pile foundation construction equipment for complex geological environments with low headroom, provided as an embodiment of the present invention; Figure 10 This is a schematic diagram of the storage structure of a pile foundation construction equipment for complex geological environments with low headroom, provided as an embodiment of the present invention.

[0026] Explanation of the markings in the image: 1. Mast; 2. Rotary drilling assembly; 201. Drill rod; 202. Drill bit; 203. Limiting connector; 204. Limiting boss; 205. Rotating support; 206. Lifting hydraulic cylinder; 207. Rotary drive component; 208. Drive gear; 209. Transmission gear; 210. Drive motor; 211. Winch; 212. Wheel frame; 213. Guide wheel; 214. Traction rope; 3. Synchronous slag discharge assembly; 301. Rotating rod; 302. Screw conveyor blade; 303. Crushing blade; 304. Synchronous gear; 305. Linkage gear; 306. Reversing gear; 307. Partition plate; 308. Water filling connector; 309. Positioning cone; 310. Rotary drilling jet hole; 311. Slag discharge jet hole; 312. Guide pipe; 313. Slag discharge pipe. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0028] Combination Figure 1 and Figure 2This application discloses a pile foundation construction equipment for complex geological environments with low headroom, comprising: a mast 1, a rotary drilling assembly 2, and a synchronous slag removal assembly 3. In practical application, the mast 1 is set vertically, and the rotary drilling assembly 2 is used to perform rotary drilling on the construction area. During the rotary drilling process, the synchronous slag removal assembly 3 is used to synchronously remove the generated waste slag, thereby greatly improving construction efficiency and construction effect.

[0029] Specifically, an assembly frame is hinged to one side of the mast 1, and a support hydraulic cylinder is hinged between the assembly frame and the mast 1. The mast 1 is vertically supported and horizontally retracted by controlling the extension and retraction of the extension end of the support hydraulic cylinder.

[0030] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The rotary drilling assembly 2 is located on one side of the mast 1. The rotary drilling assembly 2 includes a drill rod 201, a drill bit 202, a rotary drive component, and a wire rope traction component. In practical applications, the drill rod 201 is raised and lowered using the wire rope traction component, and the rotary drive component drives the drill rod 201, causing the drill rod 201 and drill bit 202 to rotate synchronously, thereby enabling rotary drilling in the construction area.

[0031] Combination Figure 1 , Figure 9 and Figure 10 The drill pipe 201 is rotatably mounted on one side of the mast 1. The drill pipe 201 serves to assemble, fix, and drive the drill bit 202 to rotate.

[0032] Combination Figure 1 The rotary drilling assembly 2 also includes a limiting connector 203 and multiple sets of limiting bosses 204. The limiting connector 203 is rotatably connected to the upper end of the drill rod 201. The limiting connector 203 limits the assembly of the drill rod 201, facilitating the wire rope traction component to slide and drive the drill rod 201 by traction of the limiting connector 203.

[0033] Combination Figure 1 Multiple sets of limiting bosses 204 are fixedly installed on the outside of the drill pipe 201. The multiple sets of limiting bosses 204 play a role in limiting the rotation of the drill pipe 201.

[0034] Combination Figure 1 The drill bit 202 is fixedly connected to the lower end of the drill rod 201. Rotary drilling is performed on the construction area by rotating the drill bit 202.

[0035] Combination Figure 1 , Figure 2 and Figure 3The rotary drive component is slidably connected to the drill pipe 201 and is used to drive the drill pipe 201 to rotate. The rotary drive component includes a rotating support 205, a lifting hydraulic cylinder 206, a rotary drive component 207, a drive gear 208, a transmission gear 209, and a drive motor 210. In practical applications, the drive motor 210 is controlled to drive the transmission gear 209 to rotate, so that the rotary drive component 207 can rotate under the meshing action of the transmission gear 209 and the drive gear 208. The rotation of the rotary drive component 207 drives the drill pipe 201 to rotate synchronously.

[0036] Combination Figure 1 , Figure 2 and Figure 3 The rotating support 205 is slidably connected to the mast 1, and the lifting hydraulic cylinder 206 is fixedly connected to the mast 1, with its telescopic end fixedly connected to the rotating support 205. The lowering limit of the drill bit 202 and drill rod 201 is adjusted by driving the rotating support 205 to slide through the telescopic end of the lifting hydraulic cylinder 206.

[0037] Combination Figure 1 , Figure 2 and Figure 3 The rotary drive component 207 is rotatably mounted within the rotary support 205. A drive gear 208 is fixedly sleeved on the outside of the rotary drive component 207. A transmission gear 209 is located on one side of the drive gear 208 and meshes with it. A drive motor 210 is fixedly mounted on one side of the rotary drive component 207, and its output shaft is fixedly connected to the transmission gear 209. By controlling the operation of the drive motor 210, the transmission gear 209 is driven to rotate, allowing the rotary drive component 207 to rotate under the meshing action of the transmission gear 209 and the drive gear 208. The rotation of the rotary drive component 207 drives the drill rod 201 to rotate synchronously.

[0038] Combination Figure 1 and Figure 2 The wire rope traction component is located at the upper end of the drill rod 201 and is used to move and traction the drill rod 201. The wire rope traction component includes a winch 211, a wheel frame 212, a pair of guide wheels 213, and a traction rope 214. The winch 211 is fixedly installed on one side of the mast 1, and the winding and unwinding state of the traction rope 214 is controlled by controlling the rotation state of the winch 211.

[0039] Combination Figure 1 and Figure 2 The wheel frame 212 is fixedly mounted on the upper side of the mast 1, and a pair of guide wheels 213 are rotatably connected to the wheel frame 212. The wheel frame 212 and the pair of guide wheels 213 work together to support and guide the traction rope 214.

[0040] Combination Figure 1 and Figure 2 One end of the traction rope 214 is wound around the outside of the winch 211, and the other end of the traction rope 214 is fixedly connected to the limiting connector 203. When the traction rope 214 is in the released state, it can guide the drill rod 201 and drill bit 202 to move downward; when the traction rope 214 is in the winding state, it can lift the drill rod 201 and drill bit 202.

[0041] Combination Figure 2 , Figure 4 and Figure 7 The synchronous slag removal assembly 3 is installed inside the drill pipe 201. The synchronous slag removal assembly 3 includes a rotating rod 301, a spiral conveying blade 302, multiple sets of crushing blades 303, a linkage component, and a jet-type slag removal component. In practical applications, the linkage component drives the rotating rod 301 to rotate, which in turn synchronously drives the spiral conveying blades 302 and the multiple sets of crushing blades 303 to rotate. The rotation of the multiple sets of crushing blades 303 crushes and lifts the slag inside the drill bit 202. Simultaneously, the jet-type slag removal component sprays water onto the crushed slag, forming mud, which facilitates the synchronous discharge of the slag by subsequent mud extraction.

[0042] Combination Figure 2 , Figure 5 and Figure 7 The rotating rod 301 is rotatably mounted inside the drill rod 201. The rotating rod 301 serves to assemble, fix, and synchronously rotate the spiral conveying blade 302 and the crushing blade 303.

[0043] Combination Figure 1 , Figure 2 and Figure 5 The upper end of the rotating rod 301 is provided with a limiting connector 203. The number of crushing blades 303 is 3 to 6 sets, and the length of the multiple sets of crushing blades 303 increases progressively from bottom to top. By rotating the multiple sets of crushing blades 303 with the rotation of the rotating rod 301, the waste residue in the drill bit 202 can be crushed, which facilitates the subsequent discharge of the waste residue.

[0044] Specifically, the number of pulverized blades 303 is 3 groups.

[0045] Combination Figure 2 , Figure 5 and Figure 7The spiral conveying blade 302 and multiple sets of crushing blades 303 are fixedly sleeved on the outside of the rotating rod 301, and the multiple sets of crushing blades 303 are arranged inside the drill bit 202. The linkage component is used to drive the rotating rod 301 and the drill rod 201 to rotate and link. The linkage component includes a synchronous gear 304, a linkage gear 305, a pair of reversing gears 306 and a partition plate 307. The synchronous gear 304 is fixedly sleeved on the outside of the rotating rod 301. The linkage gear 305 is sleeved on the outside of the synchronous gear 304 and is fixedly connected to the inner wall of the drill rod 201. A pair of reversing gears 306 are arranged between the synchronous gear 304 and the linkage gear 305, and the reversing gears 306 mesh with the synchronous gear 304 and the linkage gear 305. The partition plate 307 is arranged below the synchronous gear 304 and is fixedly connected to the inner wall of the drill rod 201. The linkage gear 305 rotates synchronously with the rotation of the drill rod 201. At the same time, the synchronization gear 304 rotates in the opposite direction to the rotation of the drill rod 201 under the meshing action of the reversing gear 306 and the linkage gear 305.

[0046] Combination Figure 2 , Figure 5 and Figure 7 The jet-type slag discharge component is configured in conjunction with the rotating rod 301 to spray slag-discharging water into the drill bit 202. The jet-type slag discharge component includes a water-filling connector 308, a positioning cone 309, multiple rotary drilling jet holes 310, and multiple slag discharge jet holes 311. The rotating rod 301 is a hollow rod-shaped component with openings at both ends. The water-filling connector 308 is rotatably connected to the upper end of the rotating rod 301, and the positioning cone 309 is fixedly connected to the lower end of the rotating rod 301. Multiple rotary drilling jet holes 310 and multiple slag discharge jet holes 311 are provided on the outer side of the positioning cone 309. Water is filled into the rotating rod 301 through the water-filling connector 308. The cooperation between the rotating rod 301 and the positioning cone 309 not only guides the rotary drilling of the drill bit 202 but also guides the water flow.

[0047] Preferably, the number of slag discharge jet holes 311 is twice that of rotary drilling jet holes 310, ensuring the effectiveness of slag flushing and discharge treatment.

[0048] Combination Figure 2 and Figure 7 The jet-type slag discharge component also includes a guide pipe 312 and a pair of slag discharge pipes 313. The guide pipe 312 is positioned above the limiting connector 203 and has one inlet and two outlets. One end of each pair of slag discharge pipes 313 is connected to one of the two outlets of the guide pipe 312, and the other end of each pair of slag discharge pipes 313 passes through the partition 307. This facilitates the subsequent extraction of waste slag and mud above the drill pipe 201 by pumping out waste liquid from the guide pipe 312.

[0049] Combination Figure 1 , Figure 9 and Figure 10 A pile foundation construction method for complex geological environments with low headroom includes the following steps: S1. Construction preparation: Clear the construction area and move the pile foundation construction equipment to the construction area. S2. Equipment debugging: Adjust mast 1 from a horizontal state to a vertical state, and position drill bit 202 according to the pile foundation location; S3. Rotary drilling: By controlling the winch 211 to release the traction rope 214, the drill rod 201 and drill bit 202 fall vertically along the rotary drive 207 under the action of gravity until the drill bit 202 contacts the ground. At the same time, by controlling the operation of the drive motor 210, the drill rod 201 can rotate under the cooperation of the rotary drive 207, drive gear 208 and transmission gear 209. The drill bit 202 is in the rotary drilling state by using the lifting hydraulic cylinder 206 to press down the rotating support 205. S4. Synchronous slag discharge: When the drill rod 201 rotates, the rotating rod 301 rotates in the opposite direction under the cooperation of the synchronous gear 304, the linkage gear 305 and a pair of reversing gears 306. By driving the spiral conveying blade 302 and multiple sets of crushing blades 303 to rotate synchronously through the rotating rod 301, the waste slag generated during the rotary drilling process of the drill bit 202 can be crushed and vertically lifted. S5. Simultaneously, water is filled into the rotating rod 301 through the water filling connector 308. The water flow is transported to the positioning cone 309 under the action of the rotating rod 301, and discharged along multiple rotary drilling jet holes 310 and slag discharge jet holes 311. By spraying water from multiple rotary drilling jet holes 310 and slag discharge jet holes 311 at an angle downwards or upwards, the pulverized waste in the drill bit 202 is turned into mud, which is convenient for subsequent mud extraction through the slag discharge pipe 313 to remove slag from the drill rod 201.

[0050] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A pile foundation construction equipment for complex geological environments with low headroom, characterized in that, include: Mast (1); A rotary drilling assembly (2) is disposed on one side of the mast (1). The rotary drilling assembly (2) includes a drill rod (201), a drill bit (202), a rotary drive component, and a wire rope traction component. The drill rod (201) is rotatably disposed on one side of the mast (1). The drill bit (202) is fixedly connected to the lower end of the drill rod (201). The rotary drive component is slidably connected to the drill rod (201) and is used to drive the drill rod (201) to rotate. The wire rope traction component is disposed at the upper end of the drill rod (201) and is used to move and traction the drill rod (201). The synchronous slag discharge assembly (3) is disposed inside the drill rod (201). The synchronous slag discharge assembly (3) includes a rotating rod (301), a spiral conveying blade (302), multiple sets of crushing blades (303), a linkage component, and a jet slag discharge component. The rotating rod (301) is rotatably disposed inside the drill rod (201). The spiral conveying blade (302) and multiple sets of crushing blades (303) are fixedly sleeved on the outside of the rotating rod (301), and the multiple sets of crushing blades (303) are disposed inside the drill bit (202). The linkage component is used to drive the rotating rod (301) to rotate and link with the drill rod (201). The jet slag discharge component is configured in conjunction with the rotating rod (301) and is used to spray slag discharge water into the drill bit (202).

2. The pile foundation construction equipment for complex geological environments with low headroom according to claim 1, characterized in that: The rotary drilling assembly (2) also includes a limiting connector (203) and multiple sets of limiting bosses (204). The limiting connector (203) is rotatably connected to the upper end of the drill rod (201), and the multiple sets of limiting bosses (204) are fixedly set on the outside of the drill rod (201).

3. The pile foundation construction equipment for complex geological environments with low headroom according to claim 2, characterized in that: The rotary drive component includes a rotating support (205), a lifting hydraulic cylinder (206), a rotary drive component (207), a drive gear (208), a transmission gear (209), and a drive motor (210). The rotating support (205) is slidably connected to the mast (1), the lifting hydraulic cylinder (206) is fixedly connected to the mast (1), and the telescopic end of the lifting hydraulic cylinder (206) is fixedly connected to the rotating support (205).

4. The pile foundation construction equipment for complex geological environments with low headroom according to claim 3, characterized in that: The rotary drive component (207) is rotatably mounted inside the rotary support (205). The drive gear (208) is fixedly sleeved on the outside of the rotary drive component (207). The transmission gear (209) is located on one side of the drive gear (208) and meshes with the drive gear (208). The drive motor (210) is fixedly mounted on one side of the rotary drive component (207). The output shaft of the drive motor (210) is fixedly connected to the transmission gear (209).

5. The pile foundation construction equipment for complex geological environments with low headroom according to claim 4, characterized in that: The wire rope traction component includes a winch (211), a wheel frame (212), a pair of guide wheels (213), and a traction rope (214). The winch (211) is fixedly installed on one side of the mast (1), the wheel frame (212) is fixedly installed on the upper side of the mast (1), and the pair of guide wheels (213) are rotatably connected to the wheel frame (212). One end of the traction rope (214) is wrapped around the outside of the winch (211), and the other end of the traction rope (214) is fixedly connected to the limiting connector (203).

6. The pile foundation construction equipment for complex geological environments with low headroom according to claim 5, characterized in that: The upper end of the rotating rod (301) is provided through the limiting connector (203), and the number of the crushing blades (303) is 3 to 6 sets, and the length of the multiple sets of crushing blades (303) increases gradually from bottom to top.

7. The pile foundation construction equipment for complex geological environments with low headroom according to claim 6, characterized in that: The linkage component includes a synchronous gear (304), a linkage gear (305), a pair of reversing gears (306), and a partition (307). The synchronous gear (304) is fixedly sleeved on the outside of the rotating rod (301). The linkage gear (305) is sleeved on the outside of the synchronous gear (304) and is fixedly connected to the inner wall of the drill rod (201). The pair of reversing gears (306) are disposed between the synchronous gear (304) and the linkage gear (305), and the reversing gears (306) mesh with the synchronous gear (304) and the linkage gear (305). The partition (307) is disposed below the synchronous gear (304) and is fixedly connected to the inner wall of the drill rod (201).

8. The pile foundation construction equipment for complex geological environments with low headroom according to claim 7, characterized in that: The jetting slag discharge component includes a water filling connector (308), a positioning cone (309), multiple rotary drilling jet holes (310), and multiple slag discharge jet holes (311). The rotating rod (301) is a hollow rod-shaped component with open ends. The water filling connector (308) is rotatably connected to the upper end of the rotating rod (301), and the positioning cone (309) is fixedly connected to the lower end of the rotating rod (301). Multiple rotary drilling jet holes (310) and multiple slag discharge jet holes (311) are provided on the outer side of the positioning cone (309).

9. The pile foundation construction equipment for complex geological environments with low headroom according to claim 8, characterized in that: The jet-type slag discharge component also includes a guide pipe (312) and a pair of slag discharge pipes (313). The guide pipe (312) is located above the limiting connector (203). The guide pipe (312) has one liquid inlet and two liquid outlets. One end of the pair of slag discharge pipes (313) is connected to the two liquid outlets of the guide pipe (312) respectively. The other end of the pair of slag discharge pipes (313) is disposed through the partition plate (307).

10. A pile foundation construction method for complex geological environments with low clearance, comprising the pile foundation construction equipment for complex geological environments with low clearance as described in claim 9, characterized in that, It also includes the following steps: S1. Construction preparation: Clear the construction area and move the pile foundation construction equipment to the construction area. S2. Equipment debugging: Adjust the mast (1) from a horizontal state to a vertical state, and position the drill bit (202) according to the pile foundation position; S3. Rotary drilling: By controlling the winch (211) to release the traction rope (214), the drill rod (201) and drill bit (202) fall vertically along the rotary drive (207) under the action of gravity until the drill bit (202) contacts the ground. At the same time, by controlling the operation of the drive motor (210), the drill rod (201) can rotate under the cooperation of the rotary drive (207), drive gear (208) and transmission gear (209). The drill bit (202) is in the rotary drilling state by using the lifting hydraulic cylinder (206) to press down the rotating support (205). S4. Synchronous slag discharge: When the drill rod (201) rotates, the rotating rod (301) rotates in the opposite direction under the cooperation of the synchronous gear (304), the linkage gear (305) and a pair of reversing gears (306). By driving the spiral conveying blades (302) and multiple sets of crushing blades (303) to rotate synchronously through the rotating rod (301), the waste slag generated during the rotary drilling process of the drill bit (202) can be crushed and vertically lifted. S5. At the same time, water is filled into the rotating rod (301) through the water filling connector (308). The water flow is transported to the positioning cone (309) under the action of the rotating rod (301) and discharged along multiple rotary drilling jet holes (310) and slag discharge jet holes (311). The waste slag crushed in the drill bit (202) is formed into mud by spraying water downward or upward through multiple rotary drilling jet holes (310) and slag discharge jet holes (311) respectively. This facilitates the subsequent slag discharge of the drill rod (201) by extracting mud through the slag discharge pipe (313).

Images