CN116427843A

CN116427843A - Long spiral jet grouting pile drilling machine and construction process thereof

Info

Publication number: CN116427843A
Application number: CN202310407419.8A
Authority: CN
Inventors: 董峻豪; 王会涛; 张媛媛
Original assignee: Shandong Jinkan Rock Soil Engineering Co ltd
Current assignee: Shandong Jinkan Rock Soil Engineering Co ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-07-14

Abstract

The invention relates to the technical field of building construction devices, in particular to a long spiral jet grouting pile drilling machine and a construction process thereof, wherein the long spiral jet grouting pile drilling machine comprises a crawler frame, a winch and a connecting arm, and a connecting part fixed on the connecting arm is rotationally connected with the crawler frame, and the long spiral jet grouting pile drilling machine further comprises: the spiral jet drilling tool is connected with the winch through a traction cable; the locking mechanism comprises a pushing component and a locking piece, and the locking piece is matched with the embedded part arranged on the connecting part and can lock the position state of the connecting arm; the pushing component comprises a driven structure and a guide plate; the adjusting mechanism is arranged on the crawler frame and is communicated with the spiral jet drilling tool, the adjusting mechanism comprises a conduction assembly, an expansion assembly and two groups of symmetrically arranged plugging plates, the driven structure is matched with the guide plate to drive the locking piece to move into the embedded part, the expansion assembly can drive the plugging plates to act, and the cement pumping speed is changed while the load of the hydraulic cylinder is reduced.

Description

Long spiral jet grouting pile drilling machine and construction process thereof

Technical Field

The invention relates to the technical field of building construction devices, in particular to a long spiral jet grouting pile drilling machine and a construction process thereof.

Background

The cement mixing pile is widely applied to the fields of soft soil foundation treatment, foundation pit support, waterproof curtain and the like due to simple and convenient construction and low cost.

The existing cement-soil mixing pile adopts a stepwise manner, namely two steps of pore-forming and cement slurry injection, so that the construction period is long, and therefore, a long spiral jet grouting pile drilling machine is introduced to enable the pore-forming and cement slurry injection to be carried out synchronously, but the injection amount of cement slurry needs to be regulated and controlled independently, the pore-forming speed needs to be controlled according to the parameters determined by a pile-forming process test according to stratum conditions, and the engineering quality of the cement-soil mixing pile can be influenced if the cement slurry pumping speed is too high, and the pore-opening slurry returning is caused.

Therefore, in the cement-soil mixing pile manufacturing process, the pumping quantity of cement needs to be regulated and controlled in real time according to the pore-forming speed, the pore-forming speed of the conventional long spiral jet grouting pile drilling machine and the pumping of cement slurry are two independent systems, and when in operation, real-time matching is needed, so that the operation difficulty is improved, and the quality and the level of the cement-soil mixing pile are also easily uneven.

Disclosure of Invention

The invention aims to provide a long spiral jet grouting pile drilling machine and a construction process thereof, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a long spiral jet grouting pile drilling machine, comprising: the crawler frame, the winch and the connecting arm are rotationally connected with the connecting part fixed on the connecting arm;

further comprises:

the spiral jet grouting drilling tool is arranged on the connecting arm and connected with the winch through a traction cable, and the winch can drive the spiral jet grouting drilling tool to move along the length direction of the connecting arm by releasing or winding the traction cable;

the locking mechanism is formed between the connecting part and the crawler frame and is connected with the winch, and comprises a pushing component and a locking piece, wherein the locking piece is matched with a jogged part arranged on the connecting part and can lock the position state of the connecting arm;

the pushing component comprises a driven structure and a guide plate, and the driven structure is matched with the guide plate and can drive the locking piece to move towards the embedded part;

the adjusting mechanism is arranged on the crawler frame and communicated with the spiral jet drilling tool, and comprises a conduction assembly, an expansion assembly and two groups of symmetrically arranged plugging plates, wherein the driven structure is matched with the guide plate to drive the locking piece to move into the embedded part, and the expansion assembly can drive the plugging plates to act so as to change the conduction quantity of the conduction assembly.

As a further scheme of the invention: the spiral rotary spraying drilling tool comprises a mounting frame which is connected with the traction cable and is arranged on the connecting arm in a sliding manner, a driving motor is fixed on the mounting frame, and an output shaft of the driving motor penetrates through the mounting frame and is connected with a composite drill bit;

the inside of compound drill bit is hollow structure, just compound drill bit's upper portion is long auger stem, and the lower part is stirring jet grouting drill bit, be the circumference on the stirring jet grouting drill bit and be provided with at least one stirring leaf, just be provided with on the stirring jet grouting drill bit and switch on its inside and outside high pressure nozzle.

As still further aspects of the invention: the driven structure comprises a rotary rod rotatably mounted on the crawler frame, the rotary rod is connected with the winch through a transmission belt, a follower is fixed at one end of the rotary rod, far away from the crawler frame, two first sliding grooves are symmetrically formed in the follower, a first sliding block is slidably mounted in the first sliding groove, the first sliding block is connected with an energy storage sleeve piece arranged inside the rotary rod, and a balancing weight is fixed on the first sliding block;

the driven structure further comprises two transverse plates which are symmetrically arranged and connected with the energy storage sleeve, the transverse plates are connected with a cross sliding sleeve arranged on the crawler frame, the cross sliding sleeve is in rolling connection with the guide plate, and the locking piece can be driven to move.

As still further aspects of the invention: the inside of the rotary rod is of a hollow structure, and four groups of through grooves are formed in the rotary rod along the length direction of the rotary rod;

the energy storage sleeve comprises a lifting piece which is arranged in the rotary rod in a sliding manner, the lifting piece penetrates through the through groove and is connected with the transverse plate, a connecting rod which penetrates through the through groove is rotatably arranged on the lifting piece, and one end, away from the lifting piece, of the connecting rod is rotatably connected with the first sliding block;

the energy storage external member is still including setting up the inside spring of rotary rod, the one end of spring with the lifter is connected, the other end with the inner wall of rotary rod is connected.

As still further aspects of the invention: the cross sliding sleeve comprises a second sliding groove arranged on the two transverse plates, a second sliding block is arranged in the second sliding groove in a sliding mode, the two second sliding blocks are connected through a connecting rod, and three groups of first pulleys are arranged on the connecting rod at equal intervals;

the cross sliding sleeve piece further comprises a fixed sleeve connected with the crawler frame, a pushing rod connected with the locking piece is slidably mounted in the fixed sleeve, a follower plate perpendicular to the pushing rod is fixed on the pushing rod, a third sliding groove is formed in the follower plate along the length direction of the follower plate, and one group of first pulleys can roll in the third sliding groove.

As still further aspects of the invention: the guide plates are provided with two groups and are fixed on the crawler frame, vertical groove bodies and first inclined groove bodies are arranged on the guide plates, and the vertical groove bodies are in smooth connection with the first inclined groove bodies;

the vertical groove body and the first inclined groove body form a guide groove, and the other two groups of first pulleys can roll in the guide groove.

As still further aspects of the invention: the conduction assembly comprises a lower exploring groove arranged along the length direction of the connecting arm, a follow-up block rotationally connected with the long spiral drill rod is slidably arranged in the lower exploring groove, a conduction connecting seat is arranged in the follow-up block, and the conduction connecting seat is communicated with a circulation box body fixed on the connecting arm through a guide pipe;

the conduction assembly further comprises a plurality of conduction ports arranged along the circumferential direction of the long spiral drill rod, and the conduction connecting seat covers the conduction ports.

As still further aspects of the invention: the plugging plate is arranged in the circulation box body and is in sliding fit with the upper top of the circulation box body;

the expansion assembly comprises an adjusting plate connected with the plugging plate, and a second inclined groove body is formed in the adjusting plate;

the expansion assembly further comprises a plurality of vertical rods symmetrically arranged on the circulation box body, connecting sleeves are slidably arranged on the vertical rods, the connecting sleeves are connected through a horizontal plate, a second pulley capable of rolling in the second inclined groove body is rotatably arranged on the horizontal plate, and the horizontal plate is matched with a bracket connected with the second slide block.

A construction process using the long spiral jet grouting pile drilling machine comprises the following steps of:

step one: measuring paying-off pile positioning: before the curtain pile is placed in the pile position, the pile head of the slope protection pile is fully exposed, the pile position axis and the positioning point are tested according to the design drawing requirement of the pile position, holes with the diameter not smaller than phi 25 steel bars and the depth not smaller than 300mm can be punched in the pile position, lime is filled in, steel bar rods are inserted in the holes, and the pile position is marked;

step two: and (3) positioning a drilling machine: installing a spiral jet drilling tool with proper length according to the pile length, connecting firmly, stabilizing four-leg support pads after positioning a drilling machine, keeping the perpendicularity of the spiral jet drilling tool by double control of a double-line hammer arranged on the drilling machine and a level bar on the drilling machine, wherein the perpendicularity deviation is not more than 0.5%, monitoring is assisted by using a theodolite when necessary, rechecking is carried out after positioning the drilling machine, the deviation between a drilling tip and the pile point is not more than 20mm, and a drill rod, soil blocks in the drilling tip and the like are cleaned before starting the drilling machine;

step three: drilling by a drilling machine: starting the spiral jet drilling tool to drill a hole, when the spiral jet drilling tool just contacts the ground, the drilling speed is slow, the drilling speed is strictly controlled in construction, the drilling speed is controlled according to the stratum condition and the parameters determined by a pile forming process test, and the drilling is stopped after the designed elevation end point is reached;

step four: preparing cement paste: the water and cement weights are measured according to the designed water-cement ratio, the water-cement ratio is preferably 1.0-1.5, after being uniformly stirred in a slurry stirring barrel, the slurry is filtered through a 60-mesh sieve and placed in a slurry storage tank, a slurry pump is placed in the slurry storage tank to continuously stir the cement slurry, the cement slurry is prevented from precipitating, the pump head of the slurry injection pump is covered by a fine mesh screen, and the drill bit nozzle is prevented from being blocked by sucking coarse particles;

step five: the cement slurry is sprayed in a rotary way, the spiral rotary spraying drilling tool drills downwards and starts a grouting pump at the same time, high-pressure cement slurry is pumped into the spiral rotary spraying drilling tool, the pump pressure is preferably 20-30MPa, the cement slurry is sprayed in a rotary way while stirring, after the cement slurry is fed to a designed elevation end point, the drilling tool is lifted according to a designed lifting speed, meanwhile, the cement slurry is sprayed in a rotary way and stirred, the cement slurry is stopped to be pumped and stirred when the cement slurry reaches the designed elevation end point, sand pebble layers and other special conditions are met, repeated rotary spraying stirring or fixed spraying is carried out, and the diameter of a pile or the fixed spraying control width is increased by adopting multiple times of stirring spraying or fixed spraying, so that the water stopping performance is improved;

step six: and cleaning the spiral jet grouting drilling tool to construct the next pile, cleaning up floating soil on the spiral jet grouting drilling tool after the spiral jet grouting drilling tool is lifted, checking and ensuring that a nozzle on a drill bit is unblocked, and then moving to the next pile position to construct the next pile.

Compared with the prior art, the invention has the beneficial effects that:

the spiral jet drilling tool is arranged, so that soil in the hole is not completely replaced, namely, partial soil taking is carried out in the hole, the hole opening is less in slurry returning or slurry returning is avoided, the on-site civilized construction is ensured, meanwhile, the cement consumption is small, 15% of cement is saved compared with a common deep-layer stirring concrete pile, 50% of cement is saved compared with a jet grouting pile, the cutting and stirring capacity of a composite drill bit is improved under the action of a high-pressure spray nozzle, a hard soil layer can be quickly drilled, the stirring and drilling resistance is greatly reduced, and the difficulty in hard soil stratum curtain construction is solved;

through the locking mechanism, the working state of the hydraulic rod can be relieved when the spiral rotary jet drilling tool works, the stability of the angle state of the connecting arm is ensured, meanwhile, the vibration of the connecting arm is ensured not to cause the loss of a sealing element in the hydraulic rod, on one hand, the stroke precision of the hydraulic rod is ensured, and on the other hand, the use time limit of the hydraulic rod is improved, so that the running stability of the hydraulic rod in the construction period is higher;

through the shutoff subassembly that sets up, make the linking arm stable back carry out the grout pumping on one hand, improve the stability when locking part and gomphosis portion combine, on the other hand, because the soil hardness on the pore-forming route is different, and through the rotational speed that changes the hoist engine, can adjust the pumping capacity of the internal grout of circulation box for the pumping capacity of grout and spiral jet-propelled drilling tool's drilling rate phase-match, avoided the grout pumping capacity too much or too little, when making grout use amount more reasonable, ensure the engineering quality of waterproof curtain.

Drawings

FIG. 1 is a schematic diagram of one embodiment of a long spiral jet grouting pile drilling rig.

Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

FIG. 3 is a schematic view of another angle configuration of one embodiment of a long spiral jet grouting pile drilling rig.

Fig. 4 is a schematic structural view of a locking mechanism in one embodiment of a long spiral jet grouting pile drilling machine.

FIG. 5 is a schematic view of the internal structure of a rotary rod in one embodiment of a long spiral jet grouting pile drilling rig.

FIG. 6 is a schematic view of a cross slide kit in one embodiment of a long spiral jet grouting pile drilling rig.

FIG. 7 is a schematic diagram of the structure of the adjustment mechanism in one embodiment of the long spiral jet grouting pile drilling rig.

FIG. 8 is a schematic view of the internal structure of a flow-through casing in one embodiment of a long spiral jet grouting pile drilling rig.

Fig. 9 is a schematic diagram illustrating the disassembly of the spiral jet grouting drilling tool and the through connection base in an embodiment of the long spiral jet grouting pile drilling machine.

In the figure: 1. a crawler frame; 2. a connecting arm; 201. a down-going groove; 3. a connection part; 301. a fitting portion; 4. a long auger stem; 401. a conduction port; 5. stirring the rotary jet drill bit; 501. stirring the leaves; 502. a high pressure nozzle; 6. a hoist; 7. a transmission belt; 8. a rotating rod; 9. a through groove; 10. a follower; 11. a first chute; 12. a first sliding block; 13. balancing weight; 14. a connecting rod; 15. a lifting member; 16. a spring; 17. a cross plate; 18. a second chute; 19. a second slide block; 20. a first pulley; 21. a guide plate; 22. a guide groove; 2201. a vertical trough; 2202. a first inclined groove body; 23. a follower plate; 24. a third chute; 25. a push rod; 26. a fixed sleeve; 27. a locking member; 28. a bracket; 29. a flow-through box; 30. a conduit; 31. a follower block; 32. a connecting seat is communicated; 33. a plugging plate; 34. an adjusting plate; 35. a second inclined groove body; 36. a vertical rod; 37. a connecting sleeve; 38. a second pulley; 39. and a horizontal plate.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In addition, an element in the present disclosure may be referred to as being "fixed" or "disposed" on another element or being directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 to 9, in an embodiment of the present invention, a long spiral jet grouting pile drilling machine includes: the crawler frame 1, the winch 6 and the connecting arm 2 are connected with the crawler frame 1 in a rotating way, and the connecting part 3 fixed on the connecting arm 2 is connected with the crawler frame 1 in a rotating way;

further comprises: spiral jet drilling tool, locking mechanical system and adjustment mechanism.

The spiral rotary spraying drilling tool is arranged on the connecting arm 2 and is connected with the winch 6 through a traction cable, and the winch 6 can drive the spiral rotary spraying drilling tool to move along the length direction of the connecting arm 2 by releasing or winding the traction cable;

the spiral rotary spraying drilling tool comprises a mounting frame which is connected with the traction cable and is arranged on the connecting arm 2 in a sliding manner, a driving motor is fixed on the mounting frame, and an output shaft of the driving motor penetrates through the mounting frame and is connected with a composite drill bit;

the inside of compound drill bit is hollow structure, just compound drill bit's upper portion is long auger stem 4, and the lower part is stirring jet grouting drill bit 5, be the circumference on the stirring jet grouting drill bit 5 and be provided with at least one stirring leaf 501, just be provided with on the stirring jet grouting drill bit 5 and switch on its inside and outside high pressure shower nozzle 502.

When the combined drill bit is used, the combined drill bit rotates and moves downwards, in the process, the stirring jet grouting drill bit 5 and the long spiral drill rod 4 are matched to perform hole forming operation, most of soil in the hole is left in the air, meanwhile, when the hole forming operation is performed, cement slurry enters the inside of the combined drill bit and is sprayed into the hole by the high-pressure sprayer 502, the cement slurry is mixed with the soil in the hole and is stirred and mixed by the stirring blade 501, synchronous operation of jet grouting and stirring is achieved, and the combined drill bit has the characteristics of being high in construction speed, short in construction period and the like.

Through the arrangement, soil in the hole is not replaced completely, namely, partial soil taking is carried out in the hole, the hole opening is less in slurry returning or slurry returning is avoided, the on-site civilized construction is guaranteed, meanwhile, the cement consumption is small, 15% of cement is saved compared with a common deep-layer stirring concrete pile, 50% of cement is saved compared with a jet grouting pile, the cutting and stirring capacity of a composite drill bit is improved under the action of the high-pressure spray head 502, the hard soil layer can be drilled quickly, the stirring and drilling resistance is greatly reduced, and the difficult problem of hard soil stratum curtain construction is solved.

Referring to fig. 1, 2, and 4 to 6, the locking mechanism is formed between the connection portion 3 and the crawler frame 1 and connected to the hoist 6, the locking mechanism includes a pushing assembly and a locking member 27, and the locking member 27 cooperates with a fitting portion 301 formed on the connection portion 3 to lock the position of the connection arm 2;

the pushing assembly comprises a driven structure and a guide plate 21, and the driven structure is matched with the guide plate 21 and can drive the locking piece 27 to move towards the embedded part 301;

the driven structure comprises a rotary rod 8 rotatably mounted on the crawler frame 1, the rotary rod 8 is connected with the winch 6 through a transmission belt 7, a follower 10 is fixed at one end of the rotary rod 8 far away from the crawler frame 1, two first sliding grooves 11 are symmetrically arranged on the follower 10, a first sliding block 12 is slidably mounted in the first sliding grooves 11, the first sliding block 12 is connected with an energy storage sleeve member arranged inside the rotary rod 8, a balancing weight 13 is fixed on the first sliding block 12, the energy storage sleeve member comprises a lifting member 15 slidably arranged in the rotary rod 8, the lifting member 15 penetrates through the through groove 9 and is connected with a transverse plate 17, a connecting rod 14 penetrating through the through groove 9 is rotatably mounted on the lifting member 15, and one end of the connecting rod 14 far away from the lifting member 15 is rotatably connected with the first sliding block 12.

The energy storage sleeve piece further comprises a spring 16 arranged inside the rotary rod 8, one end of the spring 16 is connected with the lifting piece 15, and the other end of the spring 16 is connected with the inner wall of the rotary rod 8;

the driven structure further comprises two transverse plates 17 which are symmetrically arranged and connected with an energy storage sleeve, the transverse plates 17 are connected with a cross sliding sleeve arranged on the crawler frame 1, the cross sliding sleeve is in rolling connection with the guide plate 21 and can drive the locking piece 27 to move;

the inside of the rotating rod 8 is of a hollow structure, and four groups of through grooves 9 are formed in the rotating rod 8 along the length direction of the rotating rod;

the cross sliding sleeve comprises a second sliding groove 18 arranged on the two transverse plates 17, a second sliding block 19 is slidably arranged in the second sliding groove 18, the two second sliding blocks 19 are connected through a connecting rod, and three groups of first pulleys 20 are equidistantly arranged on the connecting rod;

the cross sliding sleeve assembly further comprises a fixed sleeve 26 connected with the crawler frame 1, a pushing rod 25 connected with the locking piece 27 is slidably installed in the fixed sleeve 26, a follower plate 23 perpendicular to the pushing rod 25 is fixed on the pushing rod 25, a third sliding groove 24 is formed in the follower plate 23 along the length direction of the follower plate, and one group of first pulleys 20 can roll in the third sliding groove 24;

the guide plate 21 is provided with two groups and is fixed on the crawler frame 1, a vertical groove 2201 and a first inclined groove 2202 are formed in the guide plate 21, the vertical groove 2201 is smoothly connected with the first inclined groove 2202, the vertical groove 2201 and the first inclined groove 2202 form a guide groove 22, and the other two groups of first pulleys 20 can roll in the guide groove 22.

When the existing long spiral jet grouting pile drilling machine is used, the crawler frame 1 and the connecting arm 2 are connected through the hydraulic rod, the angle of the connecting arm 2 is changed through the action of the hydraulic rod, the connecting arm 2 is kept in a vertical state, a drilling tool is arranged on the connecting arm 2, vibration (caused by eccentric rotation, a drill bit meeting hard objects and the like) can be generated during working, in order to keep the position angle of the connecting arm 2 stable, glaze liquid in the hydraulic rod is higher, the hydraulic rod can be caused to follow vibration in the process of following the drilling tool by the connecting arm 2, the sealing element in the hydraulic rod can be caused to be worn for a long time, the stroke of the hydraulic rod is changed, the actual angle of the connecting arm 2 is caused to be different from the preset angle, and the construction precision is reduced.

In the invention, the winch 6 is provided with two output shafts, one of which is used for winding or releasing the traction cable, the two output shafts drive the rotating rod 8 to rotate through the driving belt 7, the rotating speeds of the two output shafts are positively correlated, and the rotating speed of the output shaft connected with the driving belt 7 is higher than that of the output shaft connected with the traction cable.

Specifically, when the winch 6 releases the traction cable to enable the spiral jet drilling tool to move downwards, the winch 6 synchronously drives the rotary rod 8 to rotate through the transmission belt 7, when the rotary rod 8 is in a static state, the lifting piece 15 is at the lowest point of the stroke under the action of gravity and the spring 16, meanwhile, the lifting piece 15 enables the first sliding block 12 to be positioned at one end of the first sliding groove 11 close to the axis of the rotary rod 8 through the connecting rod 14, when the rotary rod 8 rotates, the follower 10 is driven to rotate, the first sliding block 12 and the balancing weight 13 generate centrifugal force, under the action of the centrifugal force, the first sliding block 12 moves away from the rotary rod 8 in the first sliding groove 11, at the moment, the first sliding block 12 drives the lifting piece 15 to move upwards through the connecting rod 14 and compresses the spring 16, when the lifting piece 15 moves upwards, the transverse plate 17 can be driven to move upwards, and the second sliding block 19 is driven to move upwards, meanwhile, as two groups of first pulleys 20 are arranged in the guide groove 22 in a rolling way, when the second pulleys 19 move upwards, the first pulleys 20 move along the first inclined groove body 2202 and the vertical groove body 2201 in sequence, specifically, in the initial stage that the transverse plate 17 follows the lifting piece 15 to lift, the first pulleys 20 move along the first inclined groove body 2202, at the moment, along with the lifting of the transverse plate 17, the second pulleys 19 move along one end of the second sliding groove 18 far away from the lifting piece 15, and the other groups of first pulleys 20 are arranged in the third sliding groove 24 on the follower plate 23, so that when the first pulleys 20 move in the first inclined groove body 2202, the follower plate 23 moves close to the connecting part 3, and when the first pulleys 20 move to the end of the first inclined groove body 2202, the locking piece 27 is driven to be inserted into the embedded part 301 in the connecting part 3 so as to lock the position of the connecting arm 2, at this time, the hydraulic rod stops working, and the angle state of the connecting arm 2 can still be kept stable.

Through the arrangement, when the spiral rotary jet drilling tool works, the working state of the hydraulic rod can be relieved, the stability of the angle state of the connecting arm 2 is ensured, meanwhile, the vibration of the connecting arm 2 is ensured, the loss of a sealing element in the hydraulic rod is avoided, the stroke precision of the hydraulic rod is ensured on the one hand, the use time limit of the hydraulic rod is improved on the other hand, and the running stability of the hydraulic rod in the construction period is higher.

Further, when the first pulley 20 moves into the vertical groove 2201, the first pulley 20 can only vertically lift and the locking member 27 can only horizontally move, i.e. the moving directions of the first pulley 20 are vertical, so that when the first pulley 20 vertically lifts, the stability of the locking member 27 is ensured, and the locking member 27 is ensured not to be separated from the embedded part 301.

Referring to fig. 7 to 9, the adjusting mechanism is disposed on the crawler frame 1 and is communicated with the spiral jet drill, and the adjusting mechanism includes a conducting assembly, an expanding assembly, and two groups of symmetrically disposed plugging plates 33, and after the driven structure cooperates with the guide plate 21 to drive the locking member 27 to move into the engaging portion 301, the expanding assembly can drive the plugging plates 33 to act so as to change the conducting amount of the conducting assembly;

the conduction assembly comprises a lower probe groove 201 arranged along the length direction of the connecting arm 2, a follow-up block 31 rotationally connected with the long spiral drill rod 4 is slidably arranged in the lower probe groove 201, a conduction connecting seat 32 is arranged in the follow-up block 31, and the conduction connecting seat 32 is communicated with a circulation box 29 fixed on the connecting arm 2 through a guide pipe 30;

the conduction assembly further comprises a plurality of conduction ports 401 arranged along the circumferential direction of the long spiral drill rod 4, and the conduction connection seat 32 covers the plurality of conduction ports 401;

the plugging plate 33 is arranged in the circulation box 29 and is in sliding fit with the upper top of the circulation box 29;

the expansion assembly comprises an adjusting plate 34 connected with the plugging plate 33, a second inclined groove body 35 is formed in the adjusting plate 34, the expansion assembly further comprises a plurality of vertical rods 36 symmetrically arranged on the circulation box 29, connecting sleeves 37 are slidably arranged on the vertical rods 36, the connecting sleeves 37 are connected through a horizontal plate 39, a second pulley 38 capable of rolling in the second inclined groove body 35 is rotatably arranged on the horizontal plate 39, and the horizontal plate 39 is matched with a bracket 28 connected with the two second pulleys 19.

In use, the cement pump pumps cement slurry into the flow box 29 and directs the cement slurry through the conduit 30 into the conductive connection block 32, and then the cement slurry enters the spiral jet drilling tool through the conductive port 401.

In the initial state, the two plugging plates 33 are matched with each other to plug the discharge port of the circulation box 29, at this time, the water pump is in a stop state, meanwhile, the horizontal plate 39 is at the lowest stroke point due to the counterweight plate, in the initial state, the horizontal plate 39 and the bracket 28 are in a horizontally staggered state, and a certain height difference exists between the horizontal plate 39 and the bracket 28 (the height difference is equal to the height difference between the head end and the tail end of the first inclined groove body 2202 in the vertical direction).

When the first pulley 20 rolls in the first inclined groove 2202, the second pulley 19 moves longitudinally while moving transversely, until the first pulley 20 moves to the stroke end of the first inclined groove 2202, the bracket 28 is located under the horizontal plate 39, and the bracket 28 is in an abutting state with the horizontal plate 39, at this time, the first pulley 20 slides in the vertical groove 2201 along with the continuous rising of the lifting member 15, under the guiding action of the vertical groove 2201, the position stability of the bracket 28 in the horizontal direction is ensured, and at the same time, along with the rising of the lifting member 15, the bracket 28 rises and pushes the horizontal plate 39 to rise, during the upward movement of the horizontal plate 39, the second pulley 38 moves vertically upward, and the second pulley 38 moves in the second inclined groove 35, so that when the second pulley 38 moves upward, the two adjusting plates 34 move mutually, and the circulation box 29 is conducted.

Specifically, when the winch 6 is in operation, the output shaft is gradually increased from a stationary state to a steady operation state, that is, the rotation speed of the winch 6 is gradually increased, during this process, the first pulley 20 moves to the first inclined groove 2202 and the vertical groove 2201, and when the first pulley 20 moves to the end of the first inclined groove 2202, the locking of the connecting arm 2 is completed, and when the first pulley 20 moves to the end of the first inclined groove 2202, the end of the vertical groove 2201 enables the circulation box 29 to be conducted, so that the purpose of setting is to perform cement slurry pumping after the connecting arm 2 is stabilized, and to improve the stability when the locking member 27 is combined with the fitting portion 301.

It should be noted that, in the process of forming holes by the spiral jet drilling tool, the drilling speed of the spiral jet drilling tool needs to be controlled according to the parameters determined by the pile forming process test according to the stratum condition, specifically, in order to protect the drill bit, when the spiral jet drilling tool is used for forming holes by the harder soil, the drilling speed of the spiral jet drilling tool is slower, otherwise, when the spiral jet drilling tool is used for forming holes by the softer soil, the drilling speed of the spiral jet drilling tool is faster, at the moment, the speed of releasing the traction cable by the winch 6 is changed, the pumping amount of the soil cement slurry aiming at different hardness is obviously different, one output shaft of the winch 6 is connected with the rotary rod 8, and the change of the rotating speed of the winch 6 causes the centrifugal force generated by the first slide block 12 to be different, so that the lifting and lowering amount of the bracket 28 is different, and the conduction amount of the circulation box 29 is changed accordingly.

Through the arrangement, on one hand, the connecting arm 2 is enabled to be stable and then pumped with cement paste, the stability of the locking piece 27 when being combined with the embedded part 301 is improved, on the other hand, due to the fact that the soil hardness on the pore-forming path is different, the pumping quantity of cement paste in the circulation box 29 can be adjusted by changing the rotating speed of the winch 6, the pumping quantity of cement paste is matched with the drilling speed of the spiral jet drilling tool, the pumping quantity of cement paste is prevented from being too large or too small, the using quantity of cement paste is enabled to be more reasonable, and meanwhile the engineering quality of a waterproof curtain is ensured.

It should be noted that the minimum rotation speed of the hoist 6 during operation should ensure that the locking member 27 can be inserted into the engaging portion 301.

As an embodiment of the present invention, a construction process using the long spiral jet grouting pile drilling machine is also provided, including the following steps:

step two: and (3) positioning a drilling machine: installing a spiral jet drilling tool with proper length according to the pile length, connecting firmly, stabilizing four-leg support pads after positioning a drilling machine, keeping the perpendicularity of the spiral jet drilling tool by double control of a double-line hammer arranged on the drilling machine and a level bar on the drilling machine, wherein the perpendicularity deviation is not more than 0.5%, monitoring is assisted by using a theodolite when necessary, rechecking is carried out after positioning the drilling machine, the deviation between a drill point and the pile point is not more than 20mm, and a drill rod, soil blocks in the drill point and the like are cleaned before starting the drilling machine;

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. A long spiral jet grouting pile drilling machine, comprising: the crawler frame (1), the winch (6) and the connecting arm (2), and the connecting part (3) fixed on the connecting arm (2) is rotationally connected with the crawler frame (1);

characterized by further comprising:

the spiral jet drilling tool is arranged on the connecting arm (2), the spiral jet drilling tool is connected with the winch (6) through a traction cable, and the winch (6) can drive the spiral jet drilling tool to move along the length direction of the connecting arm (2) by releasing or winding the traction cable;

the locking mechanism is formed between the connecting part (3) and the crawler frame (1) and is connected with the winch (6), the locking mechanism comprises a pushing component and a locking piece (27), and the locking piece (27) is matched with a jogged part (301) arranged on the connecting part (3) and can lock the position state of the connecting arm (2);

the pushing assembly comprises a driven structure and a guide plate (21), wherein the driven structure is matched with the guide plate (21) and can drive the locking piece (27) to move towards the embedded part (301);

the adjusting mechanism is arranged on the crawler frame (1) and is communicated with the spiral jet drilling tool, the adjusting mechanism comprises a conduction assembly, an expansion assembly and two groups of symmetrically arranged blocking plates (33), the driven structure is matched with the guide plates (21) to drive the locking piece (27) to move into the embedded part (301), and the expansion assembly can drive the blocking plates (33) to act so as to change the conduction quantity of the conduction assembly.

2. A long spiral jet grouting pile drilling rig according to claim 1, characterised in that the spiral jet grouting drilling rig comprises a mounting frame connected with the traction cable and arranged on the connecting arm (2) in a sliding manner, a driving motor is fixed on the mounting frame, and an output shaft of the driving motor penetrates through the mounting frame and is connected with a composite drill bit;

the inside of compound drill bit is hollow structure, just compound drill bit's upper portion is long auger stem (4), and the lower part is stirring jet grouting drill head (5), be circumference on stirring jet grouting drill head (5) and be provided with at least one stirring leaf (501), just be provided with on stirring jet grouting drill head (5) and switch on its inside and outside high pressure shower nozzle (502).

3. A long spiral jet grouting pile drilling machine according to claim 2, characterized in that the driven structure comprises a rotary rod (8) rotatably mounted on the crawler frame (1), the rotary rod (8) is connected with the winch (6) through a transmission belt (7), a follower (10) is fixed at one end of the rotary rod (8) far away from the crawler frame (1), two first sliding grooves (11) are symmetrically arranged on the follower (10), a first sliding block (12) is slidably mounted in the first sliding groove (11), the first sliding block (12) is connected with an energy storage sleeve arranged inside the rotary rod (8), and a balancing weight (13) is fixed on the first sliding block (12);

the driven structure further comprises two transverse plates (17) which are symmetrically arranged and connected with the energy storage sleeve, the transverse plates (17) are connected with a cross sliding sleeve arranged on the crawler frame (1), the cross sliding sleeve is in rolling connection with the guide plate (21), and the locking piece (27) can be driven to move.

4. A long spiral jet grouting pile drilling machine according to claim 3, characterized in that the rotary rod (8) is hollow in inside, and the rotary rod (8) is provided with four groups of through grooves (9) along the length direction;

the energy storage sleeve comprises a lifting piece (15) which is arranged in the rotary rod (8) in a sliding manner, the lifting piece (15) penetrates through the through groove (9) and is connected with the transverse plate (17), a connecting rod (14) penetrating through the through groove (9) is rotatably arranged on the lifting piece (15), and one end, far away from the lifting piece (15), of the connecting rod (14) is rotatably connected with the first sliding block (12);

the energy storage external member is still including setting up spring (16) inside rotary rod (8), one end of spring (16) with lifting element (15) are connected, the other end with the inner wall of rotary rod (8) is connected.

5. A long spiral jet grouting pile drilling machine according to claim 4, characterized in that the cross sliding sleeve comprises a second sliding groove (18) arranged on two transverse plates (17), a second sliding block (19) is slidably arranged in the second sliding groove (18), the two second sliding blocks (19) are connected through a connecting rod, and three groups of first pulleys (20) are equidistantly arranged on the connecting rod;

the cross sliding sleeve assembly further comprises a fixed sleeve (26) connected with the crawler frame (1), a pushing rod (25) connected with the locking piece (27) is mounted in the fixed sleeve (26) in a sliding mode, a follower plate (23) perpendicular to the pushing rod (25) is fixed on the pushing rod (25), a third sliding groove (24) is formed in the follower plate (23) along the length direction of the follower plate, and one group of first pulleys (20) can roll in the third sliding groove (24).

6. The long spiral jet grouting pile drilling machine according to claim 5, wherein two groups of guide plates (21) are arranged and fixed on the crawler frame (1), vertical groove bodies (2201) and first inclined groove bodies (2202) are formed in the guide plates (21), and the vertical groove bodies (2201) are in smooth connection with the first inclined groove bodies (2202);

the vertical groove body (2201) and the first inclined groove body (2202) form a guide groove (22), and the other two groups of first pulleys (20) can roll in the guide groove (22).

7. A long spiral jet grouting pile drilling machine according to claim 5, characterized in that the conduction assembly comprises a lower exploring groove (201) arranged along the length direction of the connecting arm (2), a follow-up block (31) rotationally connected with the long spiral drill rod (4) is slidably arranged in the lower exploring groove (201), a conduction connecting seat (32) is arranged in the follow-up block (31), and the conduction connecting seat (32) is communicated with a circulation box body (29) fixed on the connecting arm (2) through a guide pipe (30);

the conduction assembly further comprises a plurality of conduction ports (401) arranged along the circumferential direction of the long spiral drilling rod (4), and the conduction connecting seat (32) covers the plurality of conduction ports (401).

8. A long spiral jet grouting pile drilling rig as claimed in claim 7, characterised in that the blanking plate (33) is arranged in the flow-through box (29) and slidingly engages the upper top of the flow-through box (29);

the expansion assembly comprises an adjusting plate (34) connected with the plugging plate (33), and a second inclined groove body (35) is formed in the adjusting plate (34);

the expansion assembly further comprises a plurality of vertical rods (36) symmetrically arranged on the circulation box body (29), connecting sleeves (37) are slidably arranged on the vertical rods (36), the connecting sleeves (37) are connected through horizontal plates (39), second pulleys (38) capable of rolling in the second inclined groove body (35) are rotatably arranged on the horizontal plates (39), and the horizontal plates (39) are matched with supports (28) connected with the second sliding blocks (19).

9. A construction process using the long spiral jet grouting pile drilling machine as claimed in claim 1, comprising the steps of:

step two: and (3) positioning a drilling machine: installing a spiral jet drilling tool with proper length according to the pile length, connecting firmly, stabilizing four-leg support pads after positioning a drilling machine, keeping the perpendicularity of the spiral jet drilling tool by double control of a double-line hammer arranged on the drilling machine and a level bar on the drilling machine, wherein the perpendicularity deviation is not more than 0.5%, monitoring is assisted by using a theodolite if necessary, rechecking is carried out after positioning the drilling machine, the deviation between a drill point and the pile point is not more than 20mm, and a drill rod, soil blocks in the drill point and the like are cleaned before starting the drilling machine;