A geotechnical pile driving device for foundation pit support and reinforcement

Abstract

The present invention relates to the field of pile drivers, and in particular to a rock and soil pile driving device for foundation pit support and reinforcement. It includes a fixed tube, a spiral positioning plate, a spiral drill rod, a plurality of adapters, a plurality of drilling adjustment parts and a plurality of smearing plate parts; a plurality of first installation grooves are provided in a circular array on the side wall of the fixed tube; the spiral positioning plate is fixed to the top of the fixed tube; the spiral drill rod is arranged in the fixed tube and is fixedly connected to the spiral positioning plate, and both ends of the spiral drill rod extend out of the two end surfaces of the fixed tube; a plurality of adapters are installed in a circular array at the bottom end of the fixed tube; a plurality of drilling adjustment parts are respectively installed at the bottom ends of a plurality of adapters, and the drilling adjustment parts can be moved and fixed on the adapters along the radial direction of the fixed tube; they are respectively installed in a plurality of first installation grooves, and are used to smooth the side walls of the holes drilled by the drilling adjustment parts. Since the setting height of the drilling adjustment parts is relatively low, the lateral resistance they receive during excavation is relatively small, and their own resistance is relatively strong.

Description

Technical Field

[0001] The present invention relates to the field of pile drivers, and particularly to a geotechnical pile driving device for foundation pit support and reinforcement. Background Art

[0002] A spiral pile driver is a pile driving device that drives a drill rod and drill bit to drill spirally underground, and it is widely used in fields such as building construction.

[0003] Taking a pile driving device for building construction with the publication number "CN113445908B" as an example, a soil storage cylinder is arranged below the drill rod, and a soil breaking knife capable of horizontal sliding is installed on the side wall of the soil storage cylinder. When performing spiral drilling, the excavated soil will be guided by the soil breaking knife into the soil storage cylinder for temporary storage. After the space in the soil storage cylinder is exhausted, the soil storage cylinder needs to be lifted above the ground surface, and the temporarily stored geotechnical materials inside are dumped by opening the bottom end plate of the soil storage cylinder. This structural setting makes it impossible for the device to maintain a working state for a long time during pile driving and drilling, which is very inconvenient. Moreover, the soil breaking knife of this device adopts a rectangular plate-like structure, and the installation method is perpendicular or nearly perpendicular to the side of the soil storage cylinder. When performing spiral drilling, the resistance borne by the soil breaking knife is relatively large. Especially when the soil is mixed with small rocks, it is very easy to cause the soil breaking knife to break and be damaged, affecting the normal progress of construction operations. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a geotechnical pile driving device for foundation pit support and reinforcement, whose tunneling component is set at a relatively low height. Therefore, the lateral resistance received during tunneling is relatively small, and its own resistance is relatively strong, without deformation or fracture, and the stability is higher.

[0005] The present invention provides a geotechnical pile driving device for foundation pit support and reinforcement, including:

[0006] A fixed cylinder, wherein a plurality of first installation grooves are arranged in an annular array on the side wall of the fixed cylinder;

[0007] A spiral positioning plate, which is fixed at the inner top end of the fixed cylinder;

[0008] A spiral drill rod, which is arranged inside the fixed cylinder and fixedly connected to the spiral positioning plate, and both ends of the spiral drill rod extend out of the two end faces of the fixed cylinder;

[0009] A plurality of adapter components, which are installed in an annular array at the bottom end of the fixed cylinder;

[0010] A plurality of drilling adjusting components, which are respectively installed at the bottom ends of the plurality of adapter components, and the drilling adjusting components can move and be fixed on the adapter components along the radial direction of the fixed cylinder;

[0011] A plurality of plastering members are respectively installed in the plurality of first installation grooves for plastering the side walls of the holes drilled by the drilling adjustment member.

[0012] In one embodiment, the auger rod includes a rotating rod, a helical blade, and a swivel joint;

[0013] The helical blade is fixed on the rotating rod. The swivel joint is sleeved on the top end of the rotating rod and is fixedly connected to the rotating rod through a positioning pin. A helical interface is provided at the bottom end of the swivel joint. The helical interface is in contact with the end face of the helical blade. The upper side of the helical blade is lapped on the helical positioning plate and is fixedly connected to the helical positioning plate through a first fastener.

[0014] In one embodiment, an installation block is formed between two adjacent first installation grooves. Both sides of the plastering member are fixed to both sides of the installation block through second fasteners, and the surface of the plastering member is fixed to the surface of the installation block through a third fastener, and the third fastener is used to adjust the distance between the surface of the plastering member and the surface of the installation block.

[0015] In one embodiment, the plastering member includes two fixing parts and a plastering part;

[0016] The upper and lower ends of the fixing part are respectively fixed to both sides of the installation block through two second fasteners. Both sides of the plastering part are respectively connected to the two fixing parts, and the connection part is bent. The upper and lower ends of the plastering part are respectively fixed to the surface of the installation block through two third fasteners, and the distance between the limiting end of the third fastener located below and the surface of the installation block is less than the distance between the limiting end of the third fastener located above and the surface of the installation block.

[0017] In one embodiment, two concave areas are provided on the plastering part. The limiting end of the third fastener is clamped in the concave area. When the limiting end of the third fastener is in contact with the surface of the installation block, the distance between the connection part of the fixing part and the plastering part and the outer surface of the fixing cylinder is greater than the distance between the middle part of the plastering part and the outer surface of the fixing cylinder.

[0018] In one embodiment, a plurality of second installation grooves are provided at the bottom end of the fixing cylinder. A partition is installed in each second installation groove. The adapter includes a screw rod, two nuts, and a positioning plate. The screw rod passes through the partition. The two nuts are both installed on the screw rod, and the two nuts are respectively located on the upper and lower sides of the partition. The positioning plate is attached to the bottom end of the fixing cylinder. One end of the screw rod penetrates to the bottom end of the fixing cylinder and is connected to the positioning plate.

[0019] In one embodiment, two partition plates are installed in the second installation groove, and the two nuts are respectively located on the upper and lower sides of the upper partition plate. There is a gap between the lower partition plate and the bottom end of the fixed cylinder for clamping the positioning plate.

[0020] In one embodiment, the drilling adjustment member includes a fixing plate and a scraping plate;

[0021] The fixing plate is attached to the lower surface of the positioning plate. One end of the fixing plate extends into the internal space extension range of the fixed cylinder, and the other end of the fixing plate is located directly below the outer surface of the fixed cylinder. The scraping plate is arranged on the lower surface of the fixing plate. One end of the scraping plate and one end of the fixing plate facing the central axis of the fixed cylinder are in the same plane, and the other end of the scraping plate protrudes from the other end of the fixing plate.

[0022] In one embodiment, a waist-shaped hole is formed in the fixing plate. The waist-shaped hole is arranged along the radial direction of the fixed cylinder, and two fourth fasteners are inserted into the waist-shaped hole. The two fourth fasteners are both fixedly installed on the positioning plate.

[0023] In one embodiment, the scraping plate includes a shallow part, a connecting part and a deep part;

[0024] The shallow part is located on the side close to the central axis of the fixed cylinder, the deep part is located on the side far from the central axis of the fixed cylinder. The shallow part and the deep part are connected by the connecting part. The height of the shallow part is less than the height of the deep part. The shallow part is arranged along the radial direction of the fixed cylinder, and the deep part is bent.

[0025] The above-mentioned geotechnical piling device for foundation pit support and reinforcement, when in use, inserts one end of the auger rod into the fixed tube, then rotates the auger rod and pushes it completely into the fixed tube until the uppermost blade of the auger rod fits with the spiral positioning plate, at which time the two are fixed by fasteners. This structural setting facilitates the disassembly and assembly of the auger rod, so that the auger rod can be easily replaced if it is damaged. Then, the driving device is used to connect the auger rod to rotate, and the auger rod drives the fixed cylinder to rotate synchronously. Since the bottom end of the auger rod protrudes from the bottom end of the fixed cylinder, and the drilling adjustment piece is installed at the bottom end of the fixed cylinder, the auger rod will drill and dig the rock and soil, and can transport the rock and soil to the open space above the fixed cylinder through its own spiral structure, while the drilling adjustment piece can expand the edge of the hole dug by the auger rod, and push the rock and soil produced by the hole expansion to the position of the auger rod during the rotation process. Since the drilling adjustment piece is set at a low height, it receives less lateral resistance during excavation, and its own resistance is strong, so it will not deform or break, and has higher stability. At the same time, the wiper piece will squeeze and rub the inner wall of the hole, so that the rock and soil on the inner wall of the hole are tighter to avoid loosening or collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of the pile driving device provided by the present invention;

[0028] Figure 2 A schematic cross-sectional view of the pile driving device provided by the present invention;

[0029] Figure 3 A schematic diagram of the three-dimensional structure of the fixing cylinder provided by the present invention;

[0030] Figure 4 A schematic diagram of the three-dimensional structure of the spiral drill rod provided by the present invention;

[0031] Figure 5 A schematic diagram of the structure of the wiper member in the first state provided by the present invention;

[0032] Figure 6 A schematic diagram of the second state structure of the wiper member provided by the present invention;

[0033] Figure 7 A schematic diagram of the connection state structure of the adapter and the drilling adjustment member provided by the present invention;

[0034] Figure 8 A schematic structural diagram of the drilling adjustment member provided by the present invention.

[0035] Reference numerals:

[0036] 100, fixing cylinder; 110, first mounting groove; 120, mounting block; 130, second mounting groove; 140, partition; 200, spiral positioning plate; 300, spiral drill rod; 310, adapter; 311, spiral interface; 320, rotating rod; 330, spiral blade; 340, positioning pin; 350, first fastener; 400, wiping plate member; 410, fixing part; 420, wiping part; 430, second fastener; 440, third fastener; 500, adapter; 510, screw rod; 520, nut; 530, positioning plate; 600, drilling adjustment member; 610, fixing plate; 611, waist hole; 620, scraper; 621, shallow part; 622, connecting part; 623, deep part; 630, fourth fastener. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Combine the following Figures 1 to 8 The invention describes a rock and soil pile driving device for foundation pit support and reinforcement.

[0039] like Figures 1 to 3 As shown, in one embodiment, a geotechnical piling device for foundation pit support reinforcement includes a fixed cylinder 100, a spiral positioning plate 200, a spiral drill rod 300, a plurality of adapters 500, a plurality of drilling adjustment members 600 and a plurality of smearing members 400; a plurality of first mounting grooves 110 are provided in a circular array on the side wall of the fixed cylinder 100; the spiral positioning plate is fixed to the top of the fixed cylinder 100; the spiral drill rod 300 is arranged in the fixed cylinder 100 and is fixedly connected to the spiral positioning plate, and both ends of the spiral drill rod 300 extend out of the two end surfaces of the fixed cylinder 100; a plurality of adapters 500 are installed in a circular array at the bottom end of the fixed cylinder 100; a plurality of drilling adjustment members 600 are respectively installed at the bottom ends of a plurality of adapters 500, and the drilling adjustment members 600 can be moved and fixed on the adapters 500 along the radial direction of the fixed cylinder 100; they are respectively installed in a plurality of first mounting grooves 110, and are used to smooth the side walls of the holes drilled by the drilling adjustment members 600.

[0040] Specifically, when in use, one end of the auger rod 300 is inserted into the fixed cylinder 100, and then the auger rod 300 is rotated and pushed completely into the fixed cylinder 100 until the uppermost blade of the auger rod 300 is in contact with the spiral positioning plate 200. At this time, the two are fixed by fasteners, and then the driving device is used to connect the auger rod 300 to rotate, and the auger rod 300 drives the fixed cylinder 100 to rotate synchronously. Since the bottom end of the auger rod 300 protrudes from the bottom end of the fixed cylinder 100, and the drilling adjustment member 600 is installed Installed at the bottom end of the fixed cylinder 100, the auger rod 300 will drill and excavate the rock and soil, and can transport the rock and soil to the open space above the fixed cylinder 100 through its own spiral structure, and the drilling adjustment part 600 can expand the edge of the hole excavated by the auger rod 300, and push the rock and soil produced by the expansion of the hole to the position of the auger rod 300 during the rotation process, and at the same time, the wiper part 400 will squeeze and rub the inner wall of the hole, so as to make the rock and soil on the inner wall of the hole tighter to avoid loosening or collapse.

[0041] The above-mentioned geotechnical piling device for foundation pit support reinforcement, when in use, inserts one end of the auger rod 300 into the fixed tube 100, and then rotates the auger rod 300 and pushes it completely into the fixed tube 100 until the uppermost blade of the auger rod 300 fits with the spiral positioning plate 200, at which time the two are fixed by fasteners. This structural setting facilitates the disassembly and assembly of the auger rod 300, so that the auger rod 300 can be easily replaced in the event of damage. Then, the driving device is used to connect the auger rod 300 to rotate, and the auger rod 300 drives the fixed cylinder 100 to rotate synchronously. Since the bottom end of the auger rod 300 protrudes from the bottom end of the fixed cylinder 100, and the drilling adjustment member 600 is installed at the bottom end of the fixed cylinder 100, the auger rod 300 will drill and dig the rock and soil, and can transport the rock and soil to the open space above the fixed cylinder 100 through its own spiral structure, and the drilling adjustment member 600 can expand the edge of the hole excavated by the auger rod 300, and push the rock and soil produced by the expansion of the hole to the position of the auger rod 300 during the rotation process. Since the drilling adjustment member 600 is set at a low height, the lateral resistance it receives during excavation is small, and its own resistance is strong, and it will not deform or break, and has higher stability. At the same time, the wiper member 400 will squeeze and rub the inner wall of the hole, so that the rock and soil on the inner wall of the hole are more compact to avoid loosening or collapse.

[0042] like Figure 4As shown, in one embodiment, the auger rod 300 includes a rotating rod 320, a spiral blade 330, and an adapter 310; the spiral blade 330 is fixed on the rotating rod 320, the adapter 310 is sleeved on the top of the rotating rod 320, and is fixedly connected to the rotating rod 320 through a positioning pin 340, a spiral interface 311 is provided at the bottom end of the adapter 310, the spiral interface 311 is fitted with the end surface of the spiral blade 330, the upper side of the spiral blade 330 is overlapped on the spiral positioning plate 200, and is fixedly connected to the spiral positioning plate 200 through a first fastener 350.

[0043] Specifically, during installation, the adapter 310 is inserted into the rotating rod 320 and the adapter 310 is rotated until the edge of the spiral interface 311 opened at the bottom of the adapter 310 abuts against the end face of the spiral blade 330. At this time, the positioning pin 340 can be inserted into the adapter 310 and the rotating rod 320 to complete the fixation between the two. The adapter 310 is used to be fixed on the drive device, and the spiral positioning plate 200 forms a circular ring or a C-shaped ring in the direction of the central axis of the fixed cylinder 100. During the installation of the auger rod 300, the lower surface of the spiral blade 330 is always in contact with the spiral positioning plate, so as to avoid the conventional installation method causing the auger rod 300 to collide with the bottom when it is put to the bottom, causing damage to the auger rod 300. In addition, it is possible to scrape off the things that may be attached to the lower surface of the spiral blade 330 during the installation process.

[0044] In one embodiment, a mounting block 120 is formed between two adjacent first mounting grooves 110, and the two sides of the wiper member 400 are fixed to the two sides of the mounting block 120 by the second fasteners 430, and the surface of the wiper member 400 is fixed to the surface of the mounting block 120 by the third fasteners 440, and the third fasteners 440 are used to adjust the distance between the surface of the wiper member 400 and the surface of the mounting block 120.

[0045] Specifically, the wiper member 400 is provided in a plate-like structure, and the wiper member 400 is bendable and has a certain elasticity. When installing, the two side ends of the wiper member 400 are attached to the two sides of the mounting block 120, and the portion of the wiper member 400 facing the surface of the mounting block 120 is limited within a certain distance range from the surface of the mounting block 120 by the third fastener 440. After adjusting the position of the drilling adjustment member 600 on the adapter 500, the distance of the surface of the wiper member 400 protruding from the surface of the fixed cylinder 100 is adjusted by the third fastener 440, so that the wiper member 400 can just compact the inner wall of the hole expanded by the drilling adjustment member 600.

[0046] like Figure 5 and Figure 6As shown, in one embodiment, the trowel member 400 includes two fixing portions 410 and a troweling portion 420; the upper and lower ends of the fixing portions 410 are respectively fixed to both sides of the mounting block 120 through two second fasteners 430, both sides of the troweling portion 420 are respectively connected to the two fixing portions 410, and the connection portions are bent, and the upper and lower ends of the troweling portion 420 are respectively fixed to the surface of the mounting block 120 through two third fasteners 440, and the distance between the limiting end of the third fastener 440 located below and the surface of the mounting block 120 is less than the distance between the limiting end of the third fastener 440 located above and the surface of the mounting block 120.

[0047] Specifically, two concave regions are provided on the troweling portion 420, the limiting ends of the third fasteners 440 are clamped in the concave regions, and when the limiting ends of the third fasteners 440 are attached to the surface of the mounting block 120, the distance between the connection portion of the fixing portion 410 and the troweling portion 420 and the outer surface of the fixing cylinder 100 is greater than the distance between the middle portion of the troweling portion 420 and the outer surface of the fixing cylinder 100.

[0048] It should be noted that in order to better compact the inner wall of the hole, a water pumping device can be set on the ground, a hose is connected to the water outlet of the water pumping device, and an atomizing nozzle is arranged at the end of the hose. Among them, the atomizing nozzle is arranged between the troweling portion 420 and the surface of the mounting block 120, and the atomizing nozzle penetrates through the lower half of the troweling portion 420 for spraying water on the inner wall of the hole, so that the upper half of the troweling portion 420 can smear and compact the rock and soil on the inner wall of the hole.

[0049] As Figure 7 As shown, in one embodiment, a plurality of second mounting grooves 130 are provided at the bottom end of the fixing cylinder 100, a partition 140 is installed in each second mounting groove 130, the adapter 500 includes a screw 510, two nuts 520 and a positioning plate 530; the screw 510 penetrates through the partition 140, both nuts 520 are installed on the screw 510, and the two nuts 520 are respectively located on the upper and lower sides of the partition 140, the positioning plate 530 is attached to the bottom end of the fixing cylinder 100, and one end of the screw 510 penetrates through to the bottom end of the fixing cylinder 100 and is connected to the positioning plate 530.

[0050] Specifically, two partitions 140 are installed in the second mounting groove 130, the two nuts 520 are respectively located on the upper and lower sides of the upper partition 140, and there is a gap between the lower partition 140 and the bottom end of the fixing cylinder 100 for clamping the positioning plate 530.

[0051] When needed, the fixing positions of the two nuts 520 on the screw 510 can be adjusted, so as to change the distance between the positioning plate 530 and the bottom end of the fixing cylinder 100, and further change the drilling depth of the drilling adjustment member 600 to ensure that the bottom of the hole is in an arc or flat state.

[0052] As Figure 8 shown, in one embodiment, the drilling adjuster 600 includes a fixing plate 610 and a scraping plate 620; the fixing plate 610 is attached to the lower surface of the positioning plate 530, one end of the fixing plate 610 extends within the extension range of the inner space of the fixing cylinder 100, the other end of the fixing plate 610 is located directly below the outer surface of the fixing cylinder 100, the scraping plate 620 is disposed on the lower surface of the fixing plate 610, one end of the scraping plate 620 and one end of the fixing plate 610 facing the central axis of the fixing cylinder 100 are in the same plane, and the other end of the scraping plate 620 protrudes from the other end of the fixing plate 610.

[0053] Specifically, one end of the fixing plate 610 extends within the extension range of the inner space of the fixing cylinder 100, so that the fixing plate 610 has a certain length, and there is redundant space for subsequent adjustment in the radial direction of the fixing cylinder 100. By setting the end of the scraping plate 620 away from the central axis of the fixing cylinder 100 to protrude from the end of the fixing plate 610 located directly below the outer surface of the fixing cylinder 100, during pile driving and tunneling, since the scraping plate 620 is located at the bottom, the fixing cylinder 100 and the structures other than the scraping plate 620 will not touch the inner wall of the hole, effectively reducing the resistance of tunneling.

[0054] In one embodiment, a waist-shaped hole 611 is formed in the fixing plate 610, the waist-shaped hole 611 is arranged along the radial direction of the fixing cylinder 100, and two fourth fasteners 630 are inserted into the waist-shaped hole 611, and both of the two fourth fasteners 630 are fixedly installed on the positioning plate 530.

[0055] Specifically, the scraping plate 620 includes a shallow part 621, a connecting part 622 and a deep part 623; the shallow part 621 is located on the side close to the central axis of the fixing cylinder 100, the deep part 623 is located on the side away from the central axis of the fixing cylinder 100, the shallow part 621 and the deep part 623 are connected by the connecting part 622, the height of the shallow part 621 is less than the height of the deep part 623, the shallow part 621 is arranged along the radial direction of the fixing cylinder 100, and the deep part 623 is bent. Among them, the end face heights of the shallow part 621, the connecting part 622 and the deep part 623 gradually increase. During tunneling, the end of the deep part 623 away from the shallow part 621 will first contact the rock and soil surface and perform excavation, and the bent deep part 623 can also push the rock and soil towards the shallow part 621 and guide it to the spiral range of the spiral blade 330 through the shallow part 621.

[0056] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0057] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A rock and soil piling device for foundation pit support and reinforcement, characterized in that: include: A fixing cylinder, wherein a plurality of first mounting grooves are formed in a circular array on a side wall of the fixing cylinder; A spiral positioning plate, the spiral positioning plate is fixed to the top end of the fixed cylinder; A spiral drill rod, which is arranged in the fixing tube and fixedly connected to the spiral positioning plate, and both ends of the spiral drill rod extend out of the two end surfaces of the fixing tube; A plurality of adapters, wherein the plurality of adapters are installed at the bottom end of the fixed cylinder in a circular array; A plurality of drilling adjustment members, each of which is mounted on the bottom ends of the plurality of adapters, and the drilling adjustment members can be moved and fixed on the adapter along the radial direction of the fixing cylinder; A plurality of smear plate members, respectively installed in the plurality of first installation grooves, for smoothing the side walls of the holes drilled by the drilling adjustment member; A mounting block is formed between two adjacent first mounting grooves, two sides of the wiper member are fixed to two sides of the mounting block by second fasteners, the surface of the wiper member is fixed to the surface of the mounting block by third fasteners, and the third fasteners are used to adjust the distance between the surface of the wiper member and the surface of the mounting block; The wiper piece includes two fixing parts and a wiper part; The upper and lower ends of the fixing portion are respectively fixed to the two sides of the mounting block by two second fasteners, the two sides of the wiping portion are respectively connected to the two fixing portions, and the connecting parts are bent, the upper and lower ends of the wiping portion are respectively fixed to the surface of the mounting block by two third fasteners, and the distance between the limiting end of the third fastener located at the bottom and the surface of the mounting block is smaller than the distance between the limiting end of the third fastener located at the top and the surface of the mounting block.

2. A rock and soil piling device for foundation pit support and reinforcement according to claim 1, characterized in that: The auger rod comprises a rotating rod, a spiral blade and an adapter; The spiral blade is fixed on the rotating rod, the adapter is sleeved on the top of the rotating rod and fixedly connected to the rotating rod through a positioning pin, a spiral interface is opened at the bottom end of the adapter, the spiral interface is fitted with the end face of the spiral blade, the upper side of the spiral blade is overlapped on the spiral positioning plate, and is fixedly connected to the spiral positioning plate through a first fastener.

3. A rock and soil piling device for foundation pit support and reinforcement according to claim 2, characterized in that: Two concave areas are provided on the smear surface, and the limiting end of the third fastener is clamped in the concave area. When the limiting end of the third fastener is attached to the surface of the mounting block, the distance between the connection between the fixing portion and the smear surface and the outer surface of the fixed cylinder is greater than the distance between the middle portion of the smear surface and the outer surface of the fixed cylinder.

4. A rock and soil piling device for foundation pit support and reinforcement according to claim 1, characterized in that: A plurality of second mounting grooves are provided at the bottom end of the fixed tube, and a partition is installed in each of the second mounting grooves. The adapter comprises a screw rod, two nuts and a positioning plate. The screw rod passes through the partition plate, and the two nuts are installed on the screw rod, and the two nuts are respectively located on the upper and lower sides of the partition plate. The positioning plate is fitted on the bottom end of the fixed tube, and one end of the screw rod passes through the bottom end of the fixed tube and is connected to the positioning plate.

5. A rock and soil piling device for foundation pit support and reinforcement according to claim 4, characterized in that: Two partitions are installed in the second installation groove, and the two nuts are respectively located on the upper and lower sides of the upper partition. There is a gap between the lower partition and the bottom end of the fixing tube for clamping the positioning plate.

6. A rock and soil piling device for foundation pit support and reinforcement according to claim 5, characterized in that: The drilling adjustment member includes a fixing plate and a scraper; The fixing plate is attached to the lower surface of the positioning plate, one end of the fixing plate extends to the extension range of the internal space of the fixing tube, and the other end of the fixing plate is located directly below the outer surface of the fixing tube. The scraper is arranged on the lower surface of the fixing plate, one end of the scraper is located in the same plane as the end of the fixing plate facing the central axis of the fixing tube, and the other end of the scraper protrudes from the other end of the fixing plate.

7. A rock and soil piling device for foundation pit support and reinforcement according to claim 6, characterized in that: The fixing plate is provided with a waist hole, which is arranged along the radial direction of the fixing tube. Two fourth fasteners are inserted into the waist hole, and the two fourth fasteners are fixedly mounted on the positioning plate.

8. A rock and soil piling device for foundation pit support and reinforcement according to claim 7, characterized in that: The scraper comprises a shallow portion, a connecting portion and a deep portion; The shallow portion is located on a side close to the central axis of the fixed cylinder, and the deep portion is located on a side away from the central axis of the fixed cylinder. The shallow portion and the deep portion are connected by the connecting portion. The height of the shallow portion is smaller than the height of the deep portion. The shallow portion is arranged along the radial direction of the fixed cylinder, and the deep portion is arranged in a curved manner.

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