A crawler type spiral drilling machine for screw pile construction

Abstract

The present invention relates to the technical field of drilling rigs, and in particular to a crawler-type spiral drilling rig for screw pile construction. It comprises: a drilling rig frame; a swing seat, which is rotationally connected to the drilling rig frame; a bearing frame, which is slidably connected to the swing seat; a hydraulic push rod, which is rotationally connected to the drilling rig frame, and the telescopic end of the hydraulic push rod is rotationally connected to the bearing frame; a driving member, which is slidingly connected to the bearing frame; a guide member, which is arranged on the driving member; a drill rod, which is rotationally connected to the guide member and transmission-connected to the driving member, and the drill rod is provided with spiral blades. The present invention proposes a new drilling method based on the problem that the existing drill rod generates friction when drilling into a hard layer, which reduces the service life of the rotary rod. When the drilling rig encounters a hard layer, the drilling part of the drilling rig can automatically detect the increase in resistance and reduce the moving speed to reduce the wear of the drilling part.

Description

Technical Field

[0001] The invention relates to the technical field of drilling machines, and in particular to a crawler-type spiral drilling machine used for screw pile construction. Background Art

[0002] Threaded rod pile construction is a special foundation treatment and foundation engineering technology, which is mainly used to enhance the stability of the foundation. This technology uses a special spiral drill to drill into the soil to form a hole. After the drilling is completed, the drill rod on the spiral drill is lifted upward to facilitate subsequent construction. After the construction here is completed, the spiral drill moves to another area for construction and repeats the above steps. However, when the existing spiral drill encounters an unknown hard layer (such as a stone layer) during the process of drilling holes in the soil, it will continue to work according to the operating parameters of the soil, which will cause the drilling part of the spiral drill to rub violently with the hard layer, accompanied by an increase in temperature, resulting in rapid wear of the drilling part of the spiral drill, thereby reducing the service life of the drilling part of the spiral drill. Summary of the invention

[0003] The present invention adopts the following technical scheme to solve the above-mentioned shortcomings. The present invention provides a crawler type spiral drilling machine for screw pile construction.

[0004] The technical solution is as follows: A crawler auger for screw pile construction, comprising:

[0005] Drilling rig frame;

[0006] A swing seat, which is rotationally connected to the drilling rig frame;

[0007] A bearing frame, slidably connected to the swing seat;

[0008] A hydraulic push rod is rotatably connected to the drilling rig frame, and a telescopic end of the hydraulic push rod is rotatably connected to the bearing frame;

[0009] A driving member, slidably connected to the supporting frame;

[0010] A guide member, disposed on the driving member;

[0011] A drill rod is rotatably connected to the guide member and is transmission-connected to the drive member, the drill rod is provided with a spiral blade, the drill rod is provided with a chamber and a through hole that are interconnected, and the through hole of the drill rod connects the chamber on the drill rod with the guide member;

[0012] A rotary drum, slidably connected to a side of the drill rod away from the driving member, the rotary drum being fixedly connected to a fixing ring, the fixing ring being slidably connected to the drill rod;

[0013] A rotating member is fixedly connected to a side of the rotating drum away from the fixing ring, an elastic member is fixedly connected between the drill rod and the rotating member, and the rotating member is slidably connected to an extrusion plate;

[0014] The driving assembly is arranged in the rotating drum and is used for driving the extrusion plate to move.

[0015] Furthermore, the driving assembly includes:

[0016] A liquid bag, fixedly connected to the rotating member, the liquid bag is in contact with both the drill rod and the rotating drum;

[0017] The fixed shell is fixedly connected in the rotating part. The liquid bag is communicated with the fixed shell through a connecting pipe. The fixed shell is sealingly and slidably connected with a sealing part fixedly connected to the extrusion plate. A spring in contact with the sealing part is arranged in the fixed shell.

[0018] Furthermore, the extrusion plate is provided with an inclined surface.

[0019] Furthermore, when the spring in the seal is compressed to the limit, the maximum distance between the extrusion plate and the axis of the drill rod is greater than the maximum distance between the spiral blade and the axis of the drill rod.

[0020] Furthermore, the distance that the fixing ring can slide along the drill rod is a, the distance between the drill rod and the rotating member is b, and a is smaller than b.

[0021] Furthermore, the drill rod is rotatably connected to a telescopic member fixedly connected to the rotating member, and the telescopic member is used to support the liquid bag.

[0022] Furthermore, the rotating member is fixedly connected to a fixing plate.

[0023] Furthermore, the rotating member is connected to the chamber in the drill rod, the rotating member is fixedly connected to and connected to a second guide tube, the second guide tube is connected to the chamber in the drill rod through the rotating member, and a one-way valve is arranged in the second guide tube.

[0024] Furthermore, it also includes:

[0025] A first connecting shell is fixedly connected to the rotating member and is slidably connected to the drill rod;

[0026] The second connecting shell is fixedly connected to the drill rod and is slidably connected to the first connecting shell and the rotating member. The second connecting shell is used to shield the second guide tube.

[0027] Furthermore, the second guide tube is inclined in the rotating member, an air cavity is provided in the rotating member, the second guide tube is communicated with the air cavity in the rotating member, and a filter is provided at the communication position between the second guide tube and the rotating member.

[0028] The beneficial effects of the present invention are as follows: Based on the problem that the existing drill rod generates friction when drilling into a hard layer, which reduces the service life of the rotary rod, the present invention proposes a new type of drilling rig, and the specific functions are as follows:

[0029] 1. Reduce the moving speed: When the drilling rig encounters a hard layer, the drilling part of the drilling rig can automatically detect the increase in resistance and reduce the moving speed to reduce the wear of the drilling part, thereby extending the service life of the drilling part;

[0030] 2. Extending the extrusion plate: When the drilling part encounters a hard layer and the moving speed of the drilling part is not consistent with the moving speed of the drilling head, the extrusion plate is extended through the differential speed between the two and squeezes the surrounding stones to the side away from the borehole, thereby strengthening the structural strength of the drill rod passing through the hard layer and reducing the hard friction between the drilling part and the hard layer, so that the device can adapt to different geological conditions, especially in areas with more hard layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 It is another perspective schematic diagram of the three-dimensional structure of the present invention;

[0033] Figure 3 is a three-dimensional structural cross-sectional view of the guide member of the present invention;

[0034] Figure 4 It is a schematic diagram of the three-dimensional structure of the drill rod of the present invention;

[0035] Figure 5 It is a three-dimensional structural cross-sectional view of the rotating member of the present invention;

[0036] Figure 6 It is a three-dimensional structural cross-sectional view of the drill rod of the present invention;

[0037] Figure 7 It is a three-dimensional structural cross-sectional view of the fixing ring of the present invention;

[0038] Figure 8 is a three-dimensional structural cross-sectional view of the second guide tube of the present invention;

[0039] Fig. 9 It is a plan view of the three-dimensional structure of the drill rod of the present invention.

[0040] Wherein: 10-drilling rig frame, 11-swing seat, 12-carrying frame, 13-hydraulic push rod, 14-driving member, 15-guide member, 151-first guide tube, 16-drill rod, 161-spiral blade, 17-rotating drum, 18-fixing ring, 19-rotating member, 191-extrusion plate, 20-liquid sac, 21-fixed shell, 22-sealing member, 30-telescopic member, 40-fixed plate, 50-second guide tube, 60-first connecting shell, 70-second connecting shell. DETAILED DESCRIPTION

[0041] Although the present invention may be described with respect to a particular application or industry, those skilled in the art will recognize the broader applicability of the present invention. Those of ordinary skill in the art will recognize that terms such as downward, upward, etc. are used to describe the drawings and do not represent limitations of the present invention. Any numerical designations such as first or second are merely illustrative and are not intended to limit the scope of the present invention in any way.

[0042] When a hard layer (such as a stone layer) is encountered during the process of using a drill to drill a hole in the soil, the rotation speed of the drilling part of the drill remains at the same speed as when drilling in the soil (the rotation speed of the drilling part during the process of drilling in the soil will be faster than the drilling speed of other terrains), which will cause the drill rod of the drill to rub violently with the hard layer, causing the drill rod head to wear rapidly, thereby reducing the service life of the drill rod, and after the drill drill drills through the hard layer by hard extrusion, the drill rod of the drill will destroy the structure of the hard layer, causing the hard layer to scatter and collapse at the drill rod. When the stone in the hard layer collapses at the drill rod, it is easy to be transferred upward by the rotating drill rod, thereby continuing to destroy the structure of the hard layer. The new drilling method proposed by the present invention can not only reduce the wear of the drilling part of the drill, but also squeeze the stone in the hard layer inward to avoid the hard layer structure being destroyed, thereby causing the problem of local collapse, and by reducing the moving speed of the drilling part of the drill and extending the extrusion plate, the service life of the drill rod is extended, and the maintenance and replacement costs are reduced; and it has strong adaptability.

[0043] Embodiment 1: A crawler type auger drill for screw pile construction, such as Figure 1-Figure 9As shown, it includes a drilling rig frame 10; a swing seat 11, which is limitedly rotatably connected to the drilling rig frame 10; a carrier frame 12, which is slidably connected to the swing seat 11; a hydraulic push rod 13, which is rotatably connected to the drilling rig frame 10, and the telescopic end of the hydraulic push rod 13 is rotatably connected to the carrier frame 12; a driving member 14, which is slidably connected to the carrier frame 12; a guide member 15, which is arranged on the driving member 14, and the guide member 15 is fixedly connected and communicated with a first guide pipe 151; a drill rod 16, which is rotatably connected to the guide member 15 and is transmission-connected to the driving member 14, and the drill rod 16 is provided with a spiral blade 161, and the drill rod 16 is provided with a spiral blade 161. There are chambers and through holes connected to each other, and the through holes of the drill rod 16 connect the chamber thereon with the guide member 15; the rotating drum 17 is slidably connected to the side of the drill rod 16 away from the driving member 14, and the rotating drum 17 is fixedly connected to a fixing ring 18, and the fixing ring 18 is slidably connected to the drill rod 16; the rotating member 19 is fixedly connected to the side of the rotating drum 17 away from the fixing ring 18, an elastic member is fixedly connected between the drill rod 16 and the rotating member 19, and the rotating member 19 is slidably connected to an extrusion plate 191, and the extrusion plate 191 is provided with an inclined surface; a driving assembly is arranged in the rotating drum 17, and is used to drive the extrusion plate 191 to move.

[0044] In the above scheme, an electric slide rail can be provided on the carrier 12, and a driving wheel can also be provided on the driving member 14, both of which drive the driving member 14 to reciprocate along the carrier 12. The case where the electric slide rail is provided on the carrier 12 is that the electric slider in the electric slide rail on the carrier 12 is fixedly connected to the driving member 14, and is used to drive the driving member 14 to move. The case where the driving wheel is provided on the driving member 14 is that the driving wheel on the driving member 14 drives it to move along the carrier 12. The driving member 14 is a driving motor in the existing equipment, which is used to drive the drill rod 16 to rotate. The shape of the spiral blade 161 is only illustrated in the figure. The staff can change the shape of the spiral blade 161 according to the actual situation, but the size of the spiral blade 161 should be as defined in the present invention. A displacement sensor can be installed between the drill rod 16 and the rotating member 19 to detect whether a hard layer is encountered during the drilling process. When the distance between the drill rod 16 and the rotating member 19 is shortened, it proves that the drilling process of the rotating member 19 is obstructed. At this time, the rotating member 19 encounters a hard layer. The elastic member between the drill rod 16 and the rotating member 19 can be a torsion spring. The rotating member 19 is an existing drill bit. In actual use, the staff can set a limit groove and a limit pin between the drill rod 16 and the fixed ring 18 to limit the rotation angle of the fixed ring 18. When the drill rod 16 drills into the soil and encounters a hard layer, the extrusion plate 191 extends into the hard layer. The rotating member 19 is blocked by the hard layer and its moving speed is reduced. The moving speed of the rotating member 19 and the drill rod 16 forms a differential speed, so that the rotating member 19 and the extrusion plate 191 can be slowly inserted into the hard layer, thereby reducing the wear of the hard layer on the rotating member 19. When the drill rod 16 drives the rotating member 19 and the extrusion plate 191 to rotate through the adjacent elastic member, the extrusion plate 191 rotates with the rotating member 19 and squeezes the surrounding stones into the hard layer, thereby improving the structural strength of the hard layer. The inclined surface of the extrusion plate 191 is convenient for squeezing the surrounding stones.

[0045] like Figure 5-Figure 7 As shown, the driving assembly includes: a liquid capsule 20, which is fixed to the rotating member 19, and the liquid capsule 20 is in contact with both the drill rod 16 and the rotating drum 17; a fixed shell 21, which is fixed in the rotating member 19, and the liquid capsule 20 is connected to the fixed shell 21 through a connecting pipe, and the fixed shell 21 is sealingly and slidably connected with a sealing member 22 fixed to the extrusion plate 191, and a spring in contact with the sealing member 22 is arranged in the fixed shell 21. When the spring in the sealing member 22 is compressed to the limit, the maximum distance between the extrusion plate 191 and the axis of the drill rod 16 is greater than the maximum distance between the spiral blade 161 and the axis of the drill rod 16.

[0046] In the above scheme, when the liquid in the liquid capsule 20 enters the fixed shell 21 through the adjacent connecting pipe, the pressure in the fixed shell 21 increases, so that the seal 22 drives the extrusion plate 191 to move, so as to realize the active extension of the extrusion plate 191. After the extrusion plate 191 is fully extended, the distance between its outer edge and the central axis of the drill rod 16 is greater than the distance between the outer edge line of the spiral blade 161 and the central axis of the drill rod 16. The effect is that the extrusion plate 191 can squeeze the surrounding stones deeper into the hard layer, which is used to prevent the spiral blade 161 from damaging the structure of the hard layer when passing through the hard layer, resulting in the local collapse of the hard layer.

[0047] like Figure 6 and Figure 7 As shown, the distance that the fixed ring 18 can slide along the drill rod 16 is a, and the distance between the drill rod 16 and the rotating member 19 is b, where a is smaller than b, and is used to prevent the elastic member adjacent to the drill rod 16 from being excessively squeezed. The drill rod 16 is rotatably connected to a telescopic member 30 fixedly connected to the rotating member 19, and the telescopic member 30 is used to support the liquid bag 20, and the rotating member 19 is fixedly connected to a fixed plate 40.

[0048] In the above scheme, the telescopic member 30 is a metal bellows, which is used to isolate the contact between the liquid capsule 20 and the adjacent elastic member and to support the liquid capsule 20. The fixed plate 40 is used to form a differential between the rotation of the rotating member 19 and the drill rod 16 to reduce the friction between the rotating member 19 and the hard layer.

[0049] like Figure 4-Figure 9 As shown, the rotating member 19 is connected to the chamber in the drill rod 16 , the rotating member 19 is fixedly connected to and connected to a second guide pipe 50 , the second guide pipe 50 is connected to the chamber in the drill rod 16 through the rotating member 19 , and a one-way valve is provided in the second guide pipe 50 .

[0050] In the above scheme, after the drilling of the soil is completed, the second guide pipe 50 guides the concrete into the drilled hole to realize the casting of the screw pile. When the concrete passes through the second guide pipe 50, the one-way valve in the second guide pipe 50 is in an open state. Conversely, when the concrete no longer passes through the second guide pipe 50, the one-way valve in the second guide pipe 50 is in a closed state.

[0051] Working principle: Before using the device to construct the screw pile, the staff first drives the drilling rig frame 10 to the working area, and then the staff controls the hydraulic push rod 13 through the drilling rig frame 10 to push the bearing frame 12 to the Figure 1 The driving member 14 then moves downward along the carrier 12, and the driving member 14 drives the elastic member and the rotating member 19 and their accessory parts thereon to move downward through the drill rod 16. During the movement of the drill rod 16 and the rotating member 19, the rotating member 19 contacts the soil, and the holes required for the work are drilled in the soil.

[0052] During the drilling process, the squeezing force exerted by the soil on the rotating part 19 is smaller than the elastic force of its adjacent elastic part. At this time, the distance between the rotating part 19 and the drill rod 16 will not change. When the rotating part 19 encounters a hard layer during the drilling process, the rotating part 19 and the fixed plate 40 contact the hard layer. Subsequently, the rotating part 19 and the fixed plate 40 are inserted into the hard layer. After being blocked by the hard layer, the rotating part 19 and the fixed plate 40 reduce the speed of their downward movement, thereby reducing the wear of the hard layer on the rotating part 19, and then gradually shortening the distance between the rotating part 19 and the drill rod 16 (during this process, the fixing ring 18 slides upward along the drill rod 16, and the elastic part adjacent to the rotating part 19 is squeezed). Through the contact between the fixed plate 40 and the hard layer, the rotation speed of the rotating part 19 is slower than the rotation speed of the drill rod 16 (in this process, the elastic part adjacent to the rotating part 19 is gradually tightened).

[0053] The liquid capsule 20 is squeezed during the process of shortening the distance between the rotating member 19 and the drill rod 16, and the liquid in the liquid capsule 20 enters the fixed shell 21 through the adjacent connecting pipe. After the liquid enters the fixed shell 21, it pushes the sealing member 22. During the movement of the sealing member 22, the squeezing plate 191 is extended out of the rotating member 19. When the squeezing plate 191 is extended to Figure 8 After the drill pipe 16 is in the middle state, the upper side of the fixing ring 18 is in contact with the drill pipe 16, and the fixing ring 18 and its accessory parts are driven by the drill pipe 16 to be squeezed downward synchronously.

[0054] When the drill rod 16 is sufficient to drive the rotating member 19 and the extrusion plate 191 to rotate through the elastic member thereon, the extrusion plate 191 rotates along with the rotating member 19 and squeezes the surrounding stones into the hard layer, thereby improving the structural strength of the hard layer. As the rotating member 19 and the extrusion plate 191 rotate, the extrusion plate 191 rotates in the hard layer and forms a circle with a diameter greater than the diameter of the circle formed by the rotation of the spiral blade 161. After the drilling depth is sufficient, the driving member 14 drives the drill rod 16 to rotate in the opposite direction, and then moves upward along the supporting frame 12 while ensuring that the moving speed and rotation speed are consistent (the moving speed and rotation speed are consistent with the previous downward movement).

[0055] During the process of the driving member 14 driving the drill rod 16 to move upward, the drill rod 16 rotates in the opposite direction, so that a spiral groove (the part squeezed by the spiral blade 161) is formed on the inner wall of the soil body. Then, the staff connects the concrete pipe with the first guide pipe 151, so that the first guide pipe 151 guides the concrete from the through holes on the guide member 15 and the drill rod 16 to the chamber in the drill rod 16, and guides the concrete from the chamber in the drill rod 16 to the rotating member 19, and finally flows out from the second guide pipe 50 (the one-way valve in the second guide pipe 50 is pushed open during the process of the concrete flowing out of the second guide pipe 50), and the concrete guided by the second guide pipe 50 falls into the hole, thereby realizing the casting of the screw pile (i.e. the drilled hole).

[0056] During the upward movement of the drill rod 16, the rotating member 19 drives the attached parts thereon to reset and rotate under the action of the adjacent elastic member of the drill rod 16. During the reset movement of the rotating member 19, the distance between the rotating member 19 and the drill rod 16 gradually increases. The squeezing plate 191 and the sealing member 22 reset and squeeze the liquid in the fixed shell 21 under the action of the adjacent springs, so that the liquid enters the liquid capsule 20 through the adjacent connecting pipe, and the pressure in the liquid capsule 20 is increased to restore it. When the fixed ring 18 and the rotating member 19 move to the lower side of the fixed ring 18 and fit with the drill rod 16, the rotating member 19 and the squeezing plate 191 and their attached parts present Figure 7 Status in.

[0057] When the casting of the screw pile is completed, the parts on the guide 15 have moved to Figure 1 The worker can then drive the drilling rig frame 10 to move to a new working area.

[0058] Embodiment 2: Based on embodiment 1, Figure 6 and Figure 8 As shown, it also includes: a first connecting shell 60, which is fixed to the rotating member 19 and is slidably connected to the drill rod 16; a second connecting shell 70, which is fixed to the drill rod 16 and is slidably connected to both the first connecting shell 60 and the rotating member 19, and the second connecting shell 70 is used to shield the second guide tube 50, the second guide tube 50 is tilted in the rotating member 19, an air cavity is provided in the rotating member 19, the second guide tube 50 is connected to the air cavity in the rotating member 19, and a filter is provided at the connection position between the second guide tube 50 and the rotating member 19.

[0059] In the above scheme, the filter screen at the connection position between the second guide pipe 50 and the rotating part 19 only allows gas to pass through, while concrete cannot pass through. When encountering a hard layer during drilling in the soil, the second connecting shell 70 guides the gas in the inner chamber of the drill rod 16 to the second guide pipe 50 through the rotating part 19. Most of the gas is ejected from the second guide pipe 50, so that the gas impacts the hard layer around the rotation path of the extrusion plate 191, and the hard layer can be easily squeezed by the extrusion plate 191. Then the second guide pipe 50 transports the remaining part of the gas to the air cavity in the rotating part 19 to cool the rotating part 19, thereby extending the service life of the rotating part 19. When the drill rod 16 and the rotating part 19 are close to each other, the second connecting shell 70 blocks a part of the second guide pipe 50 to accelerate the gas, so that the gas can impact the hard layer in this case, thereby assisting the extrusion plate 191 in squeezing the stone in the hard layer.

[0060] Working principle: During drilling into the hard layer, the staff connects the air inlet of the external air intake device to the first guide pipe 151, and the first guide pipe 151 transports the gas to the drill rod 16 (the gas transfer process, repeat the above-mentioned process of transporting concrete), so that the gas enters the air cavity in the rotating part 19 from the second guide pipe 50, thereby achieving cooling of the rotating part 19. When the distance between the drill rod 16 and the rotating part 19 is shortened, the second connecting shell 70 gradually blocks the air inlet of the second guide pipe 50, accelerates the gas entering the second guide pipe 50, and accelerates the gas to be ejected from the second guide pipe 50. After being ejected from the second guide pipe 50, the gas impacts the hard layer, so as to facilitate the extrusion plate 191 to squeeze the stone in the hard layer.

[0061] After completing the drilling of the hard layer, the staff can replace the external air intake device connected to the first guide pipe 151 with a concrete pipe, and the subsequent process of pouring the hole can be repeated in Example 1.

[0062] While the disclosure has been described with respect to only a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that numerous other embodiments can be devised which do not depart from the scope of the invention.

Claims

1. A crawler auger for screw pile construction, characterized in that: include: Drilling rig frame (10); A swing seat (11) is connected to the drilling rig frame (10) for limited rotation; A bearing frame (12) slidably connected to the swing seat (11); A hydraulic push rod (13) is rotatably connected to the drilling rig frame (10), and a telescopic end of the hydraulic push rod (13) is rotatably connected to the supporting frame (12); A driving member (14) slidably connected to the supporting frame (12); A guide member (15) disposed on the driving member (14); a drill rod (16) rotatably connected to the guide member (15) and drivingly connected to the drive member (14); the drill rod (16) is provided with a spiral blade (161); the drill rod (16) is provided with a chamber and a through hole that are interconnected; the through hole of the drill rod (16) connects the chamber thereon with the guide member (15); A rotating drum (17) is slidably connected to a side of the drill rod (16) away from the driving member (14); the rotating drum (17) is fixedly connected to a fixing ring (18); and the fixing ring (18) is slidably connected to the drill rod (16); a rotating member (19) fixedly connected to a side of the rotating drum (17) away from the fixing ring (18); an elastic member fixedly connected between the drill rod (16) and the rotating member (19); a squeezing plate (191) slidably connected to the rotating member (19); the elastic member between the drill rod (16) and the rotating member (19) may be a torsion spring; when the drill rod (16) drives the rotating member (19) and the squeezing plate (191) to rotate via the adjacent elastic member, the squeezing plate (191) rotates along with the rotating member (19) and squeezes surrounding stones into the hard layer; A driving assembly, disposed in the rotating drum (17), and used to drive the extrusion plate (191) to move; A first connecting shell (60) is fixedly connected to the rotating member (19) and is slidably connected to the drill rod (16); The second connecting shell (70) is fixedly connected to the drill rod (16) and is slidably connected to the first connecting shell (60) and the rotating member (19); the upper side of the elastic member between the drill rod (16) and the rotating member (19) is fixedly connected to the drill rod (16); the lower side of the elastic member between the drill rod (16) and the rotating member (19) is fixedly connected to the rotating member (19); the elastic member between the drill rod (16) and the rotating member (19) is located on the periphery of the first connecting shell (60) and the second connecting shell (70); and the first connecting shell (60) and the second connecting shell (70) are both coaxial with the elastic member between the drill rod (16) and the rotating member (19).

2. A crawler auger drill for screw pile construction according to claim 1, characterized in that: The drive assembly comprises: A liquid bag (20) is fixedly connected to the rotating member (19), and the liquid bag (20) is in contact with both the drill rod (16) and the rotating drum (17); A fixed shell (21) is fixedly connected to the rotating member (19); the liquid bag (20) is connected to the fixed shell (21) via a connecting pipe; the fixed shell (21) is sealingly and slidably connected to a sealing member (22) fixedly connected to the extrusion plate (191); and a spring in contact with the sealing member (22) is arranged in the fixed shell (21).

3. A crawler auger drill for screw pile construction according to claim 2, characterized in that: The extrusion plate (191) is provided with an inclined surface.

4. A crawler auger drill for screw pile construction according to claim 3, characterized in that: When the spring in the sealing element (22) is compressed to the limit, the maximum distance between the extrusion plate (191) and the axis of the drill rod (16) is greater than the maximum distance between the spiral blade (161) and the axis of the drill rod (16).

5. The crawler-type auger drilling machine for screw pile construction according to claim 2, characterized in that: The distance that the fixing ring (18) can slide along the drill rod (16) is a, and the distance between the drill rod (16) and the rotating member (19) is b, where a is smaller than b.

6. The crawler-type auger drilling machine for screw pile construction according to claim 2, characterized in that: The drill rod (16) is rotatably connected to a telescopic member (30) fixedly connected to the rotating member (19), and the telescopic member (30) is used to support the liquid bag (20).

7. A crawler auger drill for screw pile construction according to claim 6, characterized in that: The rotating member (19) is fixedly connected to a fixing plate (40).

8. The crawler-type auger drilling machine for screw pile construction according to claim 7, characterized in that: The rotating member (19) is in communication with the chamber in the drill rod (16); the rotating member (19) is fixedly connected to and in communication with a second guide tube (50); the second guide tube (50) is in communication with the chamber in the drill rod (16) through the rotating member (19); a one-way valve is provided in the second guide tube (50).

9. The crawler-type auger drilling machine for screw pile construction according to claim 8, characterized in that: The second guide tube (50) is inclined in the rotating member (19), an air cavity is provided in the rotating member (19), the second guide tube (50) is in communication with the air cavity in the rotating member (19), a filter screen is provided at the position where the second guide tube (50) is in communication with the rotating member (19), and the second connecting shell (70) is used to shield the second guide tube (50).

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