Hole-forming drill for sawtooth anti-slide pile or retaining wall in hard rock stratum

Abstract

The utility model discloses a hard rock stratum sawtooth slide-resistant pile or retaining wall hole-forming drill which comprises a conical drill assembly, the conical drill assembly comprises a conical drill U-shaped steel frame and a plurality of conical drills, the conical drill U-shaped steel frame is of a box-shaped structure with a lateral opening, the conical drills are installed in the conical drill U-shaped steel frame, each conical drill is horizontally arranged, and the conical drills are vertically arranged. The cone drill comprises a cutter head assembly, a power assembly and a horizontal hydraulic cylinder which are sequentially connected, the power assembly drives the cutter head assembly to rotate, one end of the horizontal hydraulic cylinder is fixed to the U-shaped steel frame of the cone drill, and the other end of the horizontal hydraulic cylinder is connected with the power assembly through a telescopic rod so as to drive the cone drill to move horizontally. The utility model has the advantages that through the conical drill, component force block holes are drilled in the rock mass, and the bending resistance of the slide-resistant pile or the retaining wall is improved; vertical piles or walls and component force blocks in the rock mass can form holes at a time; drilling and digging of the component force block holes do not need assistance of other mechanical equipment, and the purposes of improving construction efficiency and saving construction and equipment cost are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling machines, in particular to a hard rock stratum sawtooth anti-slide pile or retaining wall hole forming drill. Background Art

[0002] In slope support, roadbed construction, foundation pit excavation, and tunnel entrance and exit construction, anti-slide piles or retaining walls are the most effective measures to transfer the lateral thrust of rock and soil to the stable stratum below the sliding surface, resist lateral thrust, and control engineering and geological disasters. They are widely used in various engineering fields. When the landslide thrust acts on the anti-slide piles or retaining walls, the direction of the residual sliding force is usually not horizontal, but at a certain angle to the horizontal direction. The angle of most landslides is between 10 and 30°. According to the residual sliding force vector analysis, there are horizontal and vertical components. The commonly used anti-slide piles or retaining walls only resist the horizontal component, and the vertical component only acts on the anti-slide piles or retaining walls to transfer to the sliding bed, and has no direct effect on ordinary anti-slide piles or retaining walls. For retaining walls with multiple rows of sawtooth force blocks at the cantilever end of the anti-sliding pile or retaining wall, the force blocks can exert the vertical force of the remaining downward sliding force, provide the same horizontal force to produce a reverse bending moment, and improve the bending resistance of the anti-sliding pile or retaining wall. However, it is extremely difficult to drill holes for the force blocks of the sawtooth anti-sliding pile or retaining wall. Traditional anti-sliding pile or retaining wall holes are usually excavated manually and mechanically. The collapse caused by manual bored pile construction accounts for 65% of the total collapse accidents, and the efficiency is low and the cost is high. Mechanical excavation is safer and more efficient. Therefore, the use of mechanical drilling and digging of sawtooth anti-sliding piles or retaining wall holes in the rock and soil layer is of great significance to ensure the safety of construction workers and improve efficiency.

[0003] At present, there are various drilling equipment and mechanical excavation methods. For example, the existing anti-slip pile drilling machinery has patent number CN103244053 A "Rectangular Drilling Machine", which mainly drives two T-shaped cutters evenly distributed at the bottom of the two steel frames to move toward each other and reciprocate through two cam bodies to cut the soil into a rectangular hole. Patent number CN 104533300 A "Rectangular Drilling Machine" sets a conical drill bit at the bottom of the rectangular transmission box and a cross-shaped long knife on the four sides. The conical drill bit drills into a circular pile hole, and then the cross-shaped long knife is rotated and cut to trim it into a rectangular pile hole. Patent number CN 105951798 A "A Rectangular Drilling Machine" mainly drives four concave waist cylinders with stirring knives to cut the soil through a motor to drill into a rectangular pile hole. Existing retaining wall slotting technologies mainly include bucket type and milling wheel type. Patent number CN 114687393A "A Continuous Wall Construction Equipment and Construction Method" uses a rotary drill and a grab bucket to circulate and drill the ground-connected wall slot. Patent No. CN 110258693A "A hydraulic grab and underground continuous wall construction equipment" realizes the switching between the hydraulic grab and the double-wheel milling machine through movable buckles and connecting parts, achieving multiple uses of one machine for drilling and digging underground continuous wall trenches. In order to realize the construction of ground-connected walls in low clearance, patent number CN 114086618A "A modular milling groove device for underground ground-connected wall construction" modularizes the functional components of the ground-connected wall groove forming equipment into milling and cutting modules, slurry extraction modules, winding and hanging modules and accessory reel modules, and connects them from front to back and lays them on the track; patent number CN 216108696 U "A truss chain milling and mixing ground-connected wall machine" and patent number CN 115897551 A "A continuous wall construction equipment and construction method based on TRD drilling rig" are both equipped with a chain with multiple milling and stirring heads evenly distributed on a truss with active and passive driving mechanisms at both ends, and the chain with milling and stirring heads is driven by the active driving mechanism to drill the ground-connected wall grooves.

[0004] In terms of mechanical hole-making methods, for example, patent No. CN 108678661 A "Square anti-slip pile hole-making method and square drill bit for hole-making" uses a circular drill bit of a rotary drilling rig to drill at least one row of circular guide holes in sequence along the length direction of the cross-section of the square anti-slip pile hole, and each row of circular guide holes is connected, and the side walls of the square anti-slip pile holes are tangent to the edges of the adjacent circular guide holes. Then, a square drill bit is used to sweep the hole so that the square drill bit cuts the remaining soil downward along the contour line of the square anti-slip pile hole, and the cycle is repeated until the design requirements are met. Patent No. CN110593753 A "Mechanical rapid hole-forming construction method for rectangular anti-sliding piles" first uses a rotary drilling auger round drill bit to drill pilot holes at the four corners until the pilot holes are drilled to the designed pile bottom elevation; then the pilot holes are trimmed in three parts using a slotting machine, and the construction is carried out in three grabs: the first time, the pilot hole position along the long side of the anti-sliding pile is grabbed until the designed hole depth; the second time, the pilot hole position along the other long side of the anti-sliding pile is grabbed until the designed hole depth; the third time, the remaining part in the middle is grabbed until the designed hole depth. If encountering complex and hard strata such as hard ginger stone soil and calcareous cementation layer, the slotting machine stops grabbing the soil, and the hard layer is crushed with a long-arm breaker. Patent No. CN 110820733 A "An improved simple rectangular anti-sliding pile mechanical rapid hole-forming construction method" mainly uses two rotary excavations of circular pile holes, the circular pile holes are connected and over-excavated over the rectangular pile hole contour, and a rectangular steel cylinder is placed in the pile hole and the over-excavated part is cast to form a rectangular pile hole. Patent No. CN 110714460A "A Mechanical Hole Construction Method for Rectangular Anti-sliding Piles with Reduced Filling Coefficient" and Patent No. CN 113605387 "A Fully Mechanical Construction Method for Rectangular Anti-sliding Piles" are mainly to form rectangular pile holes by rotary excavating circular pile holes twice or more, the circular pile holes are connected or partially overlapped and tangent to the rectangular pile hole contour, and the rectangular pile holes are formed by mechanically removing slag and repairing holes around the pile holes. The existing slotting construction method, Patent No. CN 115288115 A, uses a slotting machine to grab and excavate the rock and soil in the slotted holes to form a continuous ground wall after excavating the vertical slots at intervals. Patent No. CN 115094915 A "A method for constructing a trench for underground continuous wall in slightly weathered volcanic rock" arranges the lead holes as required in the first opening unit and the closing unit, first drills the lead holes, then mills the rocks between the lead holes to achieve trenching, and during construction, multiple construction units are alternately constructed. After one construction unit completes the drilling of the lead holes, the rock between the adjacent lead holes of the construction unit is milled, and the lead holes of another construction unit are drilled at the same time, realizing a reasonable combination of drilling and milling and cyclic alternating trenching. Patent No. CN 114658050 A "Construction method for trenching of underground continuous wall containing medium-weathered rock formations" adjusts the drilling rig drilling hole spacing to 2 m, and then uses a double-wheel milling machine for trenching construction. When milling the trench, the two drums rotate at a low speed in opposite directions, and the milling teeth mill and crush the rock formation, and the rock slag and mud excavated by the drill are discharged to the ground mud station through the sand suction port in the middle of the milling wheel, and the cycle is repeated until the final hole is trenched.Patent No. CN 114687393A "A continuous wall construction equipment and construction method thereof" uses a rotary drill and a grab bucket to drill and dig a ground continuous wall groove in a combined cycle.

[0005] Although the existing anti-slide pile or retaining wall slotting machines have solved some hole and slotting problems, they still have the following problems: (1) The existing drilling rigs mainly form vertical rectangular pile holes or wall slots in the rock and soil, but cannot drill force block holes in the rock; (2) Other machines or auxiliary measures are required for hole repair, and the drilling construction efficiency is low and the cost is high, and it is impossible to drill a slot or hole in one go. Summary of the invention

[0006] The purpose of the utility model is to provide a sawtooth anti-sliding pile or retaining wall hole-forming drill for hard rock formations in response to the deficiencies of the above-mentioned prior art. The cutter head assembly is driven by a power component and a horizontal hydraulic cylinder to drill rock and soil outward, thereby realizing the drilling of force component block holes in the rock body. The force component blocks can exert the vertical component of the remaining sliding force, provide a bending moment in the opposite direction to the horizontal force, and improve the bending resistance of the anti-sliding pile or retaining wall. The drilling of the force component block holes does not require the assistance of other mechanical equipment, thus saving construction period and construction costs, improving work efficiency, and ensuring project quality and the safety of construction personnel.

[0007] The purpose of this utility model is achieved by the following technical solutions:

[0008] A sawtooth anti-slip pile or retaining wall drilling drill for hard rock formations, comprising a cone drill assembly, the cone drill assembly comprising a cone drill U-shaped steel frame with a box-shaped structure opening laterally and a plurality of cone drills installed in the cone drill U-shaped steel frame, a single cone drill being horizontally arranged and a plurality of cone drills being vertically arranged, the cone drill comprising a cutter disc assembly, a power assembly and a horizontal hydraulic cylinder connected in sequence, the power assembly driving the cutter disc assembly to rotate, one end of the horizontal hydraulic cylinder being fixed to the cone drill U-shaped steel frame and the other end being connected to the power assembly via a telescopic rod to drive the cone drill to move horizontally, the cutter disc assembly comprising a conical cutter disc and a plurality of reamer assemblies evenly arranged on the outer wall of the cutter disc.

[0009] The power assembly includes a protective cover, a baffle, a base plate and a rotary cutting motor. The baffle and the base plate are respectively installed at both ends of the protective cover. A shaft hole is opened at the center of the baffle. The rotary cutting motor is fixed between the baffle and the base plate. The rotary cutting motor shaft on the rotary cutting motor passes through the shaft hole on the baffle and is connected to the center of the inner wall of the cutter disc. The cutter disc is rotatably connected to the baffle.

[0010] The rotary shaft of the rotary cutting motor is provided with a plurality of steel supports along its circumference, and the rotary shaft of the rotary cutting motor is connected to the inner wall of the cutter disc through the steel supports.

[0011] The reamer assembly comprises a reamer base and a reamer mounted on the reamer base. The reamer base is provided with a plurality of circles along the circumference of the outer wall of the cutter disc, and the reamer is provided obliquely outward.

[0012] The conical drill U-shaped steel frame is formed by enclosing a conical drill lower side guard plate, a conical drill upper side guard plate, a conical drill left side guard plate, a conical drill right side guard plate and a conical drill rear guard plate.

[0013] The advantages of the utility model are:

[0014] (1) Through the cone drill, force-digging holes are drilled in the rock body to improve the bending resistance of anti-slide piles or retaining walls;

[0015] (2) Vertical piles, walls and force blocks in the rock mass can be drilled in one go;

[0016] (3) The drilling of the force block holes does not require the assistance of other mechanical equipment, thereby achieving the purpose of improving construction efficiency and saving construction and equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the drilling rig of the utility model;

[0018] Figure 2 for Figure 1 Cross-section of the middle AA;

[0019] Figure 3 for Figure 2 Cross-section of the middle BB;

[0020] Figure 4 for Figure 2 Cross-section of the middle CC;

[0021] Figure 5 for Figure 2 Cross-section of the middle DD;

[0022] Figure 6 This is a schematic diagram of the hole-making process of the anti-sliding pile of the utility model (I);

[0023] Figure 7 for Figure 6 Cross-section of EE;

[0024] Figure 8 This is a schematic diagram of the hole-forming process of the retaining wall of the utility model (I);

[0025] Fig. 9 This is a schematic diagram of the hole-making process of the anti-sliding pile of the utility model (II);

[0026] Fig.10 for Fig. 9 Cross-section of the middle FF;

[0027] Fig.11 This is a schematic diagram of the hole-forming process of the retaining wall of the utility model (II);

[0028] Fig.12 for Fig.11 Cross-section of middle GG;

[0029] Fig.13 This is a force relationship diagram of the anti-sliding pile of the utility model;

[0030] Fig.14 for Fig.13 Enlarged view of middle g;

[0031] Fig.15 It is a three-dimensional schematic diagram of the force dividing block of the utility model;

[0032] like Figures 1 to 15 As shown, the marks in the figure represent respectively:

[0033] 1. Conical drill U-shaped steel frame, 2. Conical drill;

[0034] 11. Conical drill for lower side guard plate, 12. Conical drill for upper side guard plate, 13. Conical drill for left side guard plate, 14. Conical drill for right side guard plate, 15. Conical drill for rear guard plate;

[0035] 21. Cutter head assembly, 22. Power assembly, 23. Horizontal hydraulic cylinder, 211. Cutter head, 212. Reamer assembly, 213. Steel support, 2121. Reamer base, 2122. Reamer, 221. Protective cover, 222. Baffle, 223. Rotating shaft hole, 224. Bottom plate, 225. Peeling motor, 226. Peeling motor rotating shaft;

[0036] a1. Vertical drill assembly, a2. Conical drill assembly, b. Slope rock and soil, b1. Landslide body, b2. Sliding bed, b3. Sliding surface, c1. Vertical hole, c2. Force component hole, c3. Conical hole, d. Force component, e. Pile body, T. Sliding force, M T .Moment of sliding force, T v .Vertical component of sliding force, T h .Horizontal component of sliding force, M Tv .The torque of the vertical component of the sliding force. DETAILED DESCRIPTION

[0037] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry:

[0038] Example: Figures 1 to 15As shown, this embodiment relates to a serrated anti-slip pile or retaining wall drilling drill for hard rock formations. The drilling rig mainly includes a conical drill assembly a2 and a vertical drill assembly a1 which are relatively arranged up and down. The vertical drill assembly a1 is used for drilling a vertical hole c1 in the rock and soil, and the conical drill assembly a2 is used for drilling a force block hole c2 in the rock and soil.

[0039] like Figures 1 to 5 As shown, the cone drill assembly a2 includes a cone drill U-shaped steel frame 1 of a box-shaped structure with a side opening and a plurality of cone drills 2 installed in the cone drill U-shaped steel frame 1. A single cone drill 2 is horizontally arranged and a plurality of cone drills 2 are vertically arranged. The cone drill U-shaped steel frame 1 is surrounded by a cone drill lower side guard plate 11, a cone drill upper side guard plate 12, a cone drill left side guard plate 13, a cone drill right side guard plate 14 and a cone drill rear guard plate 15. The cone drill 2 includes a cutter head assembly 21, a power assembly 22 and a horizontal hydraulic cylinder 23 which are connected in sequence. The power assembly 22 drives the cutter head assembly 21 to rotate. One end of the horizontal hydraulic cylinder 23 is fixed to the cone drill U-shaped steel frame 1 (the rear guard plate 15 of the cone drill), and the other end is connected to the power assembly 22 (the bottom plate 224) through a telescopic rod to drive the cone drill 2 to move horizontally, that is, the horizontal hydraulic cylinder 23 drives the cone drill 2 in the cone drill U-shaped steel frame 1 to move outside the cone drill U-shaped steel frame 1 or to make the cone drill 2 outside the cone drill U-shaped steel frame 1 retract into the cone drill U-shaped steel frame 1.

[0040] Among them, the cutter disc assembly 21 includes a cutter disc 211 and a reamer assembly 212. The cutter disc 211 is conical. The reamer assembly 212 is provided with multiple reamer assemblies. The multiple reamer assemblies 212 are evenly arranged on the outer wall of the cutter disc 211 for drilling rock and soil. In this embodiment, the reamer assembly 212 includes a reamer base 2121 and a reamer 2122 installed on the reamer base 2121. The reamer base 2121 is provided with multiple circles along the circumference of the outer wall of the cutter disc 211. The reamer 2122 is arranged obliquely outward. The arrangement of the reamer base 2121 and the reamer 2122 facilitates the cone drill 2 to better drill the rock and soil.

[0041] The power assembly 22 includes a protective cover 221, a baffle 222, a base plate 224 and a rotary cutting motor 225. The protective cover 221 is cylindrical, and the baffle 222 and the base plate 224 are both circular. The baffle 222 and the base plate 224 are respectively installed at both ends of the protective cover 221. A shaft hole 223 is opened at the center of the baffle 222. The rotary cutting motor 225 is fixed between the baffle 222 and the base plate 224. The rotary cutting motor shaft 226 on the rotary cutting motor 225 passes through the shaft hole 223 on the baffle 222 and is connected to the center of the inner wall of the cutter disc 211. The rotary cutting motor 225 drives the rotary cutting motor shaft 226 thereon to rotate, so as to drive the cutter disc 211 to rotate, thereby realizing the reamer 2122 to dig the rock and soil. The rotary shaft 226 of the rotary cutting motor is provided with a plurality of steel supports 213 along its circumference, and the rotary shaft 226 of the rotary cutting motor is connected to the inner wall of the cutter disc 211 through the steel supports 213, which plays a role of connection reinforcement. In addition, the cutter disc 211 is rotatably connected to the baffle 222 to prevent rock and soil from entering from the gap between the cutter disc 211 and the baffle 222.

[0042] In addition, the drilling rig can be used to dig holes for anti-slide piles and retaining walls, including the following four hole-making methods:

[0043] The first hole forming method: Figures 1 to 7 As shown, the drilling rig is excavating an anti-sliding pile hole in the slope rock and soil body b, wherein the slope rock and soil body b includes a landslide body b1 and a sliding bed b2, a sliding surface b3 is arranged between the landslide body b1 and the sliding bed b2, the vertical hole c1 of the anti-sliding pile hole is located in the sliding bed b2 and the landslide body b1, the vertical hole c1 consists of a free section and an embedded section, the free section is located in the landslide body b1, and the embedded section is located in the sliding bed b2, the force block hole c2 of the anti-sliding pile hole is located in the landslide body b1, and the force block hole c2 is obtained through the tapered hole c3.

[0044] The construction steps of the method are as follows: control the vertical drill assembly a1 to drill the first vertical hole c1 downward, and use the power assembly 22 and the horizontal hydraulic cylinder 23 to control the conical drill 2 to drill the conical hole c3 corresponding to the first vertical hole c1 outward. After the drilling of the conical hole c3 corresponding to the first vertical hole c1 is completed, the telescopic rod of the horizontal hydraulic cylinder 23 is retracted to drive the conical drill 2 to retreat into the conical drill U-shaped steel frame 1 to drill the next vertical hole c1 and the corresponding conical hole c3. This cycle is repeated until the drilling of the last vertical hole c1 and the corresponding conical hole c3 are completed (forming a vertical pile hole). At this time, the conical drill 2 does not retreat into the conical drill U-shaped steel frame 1, and moves the drilling rig along the length direction of the vertical pile hole. The conical hole c3 is drilled by the conical drill 2 to form the force block hole c2, thereby completing the excavation of the anti-slip pile hole.

[0045] like Figures 13-15As shown in the figure, the anti-sliding pile includes a pile body e and a force component d (a plurality of force components d form a sawtooth structure). The sliding force T of the slope rock and soil body b acts on the anti-sliding pile, and the sliding force T is decomposed into the vertical component force T of the sliding force v and the horizontal component of the sliding force T h , the moment of the sliding force T is M T , the pile body e is used to resist the horizontal component of the sliding force T h , the force block d is used to convert the vertical component of the sliding force T v Converted into torque M Tv , and the moment M Tv With torque M T On the contrary, the bending resistance of the anti-slide pile is further improved.

[0046] The second pore forming method: Figures 1 to 5 as well as Figure 8 As shown, except for the method used to excavate the retaining wall hole, the rest are the same as the first hole-making method, so they will not be repeated here.

[0047] The third pore forming method: Figures 1 to 5 as well as Figures 9 and 10 As shown, except that the pore-forming method steps are different from the first pore-forming method, the rest are the same as the first pore-forming method, so they will not be repeated here.

[0048] The construction steps of the method are: control the vertical drill assembly a1 to drill the first vertical hole c1 downwards, and repeat this cycle until the drilling of the last vertical hole c1 is completed (forming a vertical pile hole). Use the power assembly 22 and the horizontal hydraulic cylinder 23 to control the conical drill 2 to drill the conical hole c3 corresponding to the last vertical hole c1 outwards. At this time, the conical drill 2 does not retreat into the conical drill U-shaped steel frame 1, and moves the drilling rig along the length direction of the vertical pile hole. The conical hole c3 is drilled by the conical drill 2 to form a force block hole c2, thereby completing the excavation of the anti-slip pile hole.

[0049] The fourth pore forming method: Figures 1 to 5 as well as Figures 11-12 As shown, except for the steps for excavating the retaining wall hole and the hole-making method which are different from the first hole-making method, the rest are the same as the first hole-making method, so they will not be repeated here.

[0050] The construction steps of the method are: control the vertical drill assembly a1 to drill the first vertical hole c1 downwards, and repeat this cycle until the drilling of the last vertical hole c1 is completed (a vertical wall groove is formed). Use the power assembly 22 and the horizontal hydraulic cylinder 23 to control the conical drill 2 to drill the conical hole c3 corresponding to the last vertical hole c1 outwards. At this time, the conical drill 2 does not retreat into the conical drill U-shaped steel frame 1, and moves the drilling rig along the length direction of the vertical pile hole. The conical hole c3 is drilled by the conical drill 2 to form the force block hole c2, thereby completing the excavation of the retaining wall hole.

[0051] The beneficial technical effects of this embodiment are:

[0052] (1) Through the cone drill, force-digging holes are drilled in the rock body to improve the bending resistance of anti-slide piles or retaining walls;

[0053] (2) Vertical piles, walls and force blocks in the rock mass can be drilled in one go;

[0054] (3) The drilling of the force block holes does not require the assistance of other mechanical equipment, thereby achieving the purpose of improving construction efficiency and saving construction and equipment costs.

[0055] Although the above embodiments have described the concepts and embodiments of the purpose of the utility model in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the utility model without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A sawtooth anti-sliding pile or retaining wall drilling drill for hard rock formations, characterized in that: It includes a cone drill assembly, which includes a cone drill U-shaped steel frame with a box-shaped structure that is open at the side and a plurality of cone drills installed in the cone drill U-shaped steel frame. The single cone drill is horizontally arranged and the plurality of cone drills are vertically arranged. The cone drill includes a cutter disc assembly, a power assembly and a horizontal hydraulic cylinder that are connected in sequence. The power assembly drives the cutter disc assembly to rotate. One end of the horizontal hydraulic cylinder is fixed to the cone drill U-shaped steel frame and the other end is connected to the power assembly through a telescopic rod to drive the cone drill to move horizontally. The cutter disc assembly includes a conical cutter disc and a plurality of reamer assemblies evenly arranged on the outer wall of the cutter disc.

2. A hard rock formation sawtooth anti-sliding pile or retaining wall drilling drill according to claim 1, characterized in that: The power assembly includes a protective cover, a baffle, a base plate and a rotary cutting motor. The baffle and the base plate are respectively installed at both ends of the protective cover. A shaft hole is opened at the center of the baffle. The rotary cutting motor is fixed between the baffle and the base plate. The rotary cutting motor shaft on the rotary cutting motor passes through the shaft hole on the baffle and is connected to the center of the inner wall of the cutter disc. The cutter disc is rotatably connected to the baffle.

3. A hard rock formation sawtooth anti-sliding pile or retaining wall drilling drill according to claim 2, characterized in that: The rotary shaft of the rotary cutting motor is provided with a plurality of steel supports along its circumference, and the rotary shaft of the rotary cutting motor is connected to the inner wall of the cutter disc through the steel supports.

4. The hard rock stratum sawtooth anti-sliding pile or retaining wall drilling drill according to claim 1, characterized in that: The reamer assembly comprises a reamer base and a reamer mounted on the reamer base. The reamer base is provided with a plurality of circles along the circumference of the outer wall of the cutter disc, and the reamer is provided obliquely outward.

5. The hard rock stratum sawtooth anti-sliding pile or retaining wall drilling drill according to claim 1, characterized in that: The conical drill U-shaped steel frame is formed by enclosing a conical drill lower side guard plate, a conical drill upper side guard plate, a conical drill left side guard plate, a conical drill right side guard plate and a conical drill rear guard plate.

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