CN115419054B - Karst strong development stratum substantial pile foundation construction device and method - Google Patents
Karst strong development stratum substantial pile foundation construction device and method Download PDFInfo
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- CN115419054B CN115419054B CN202211233907.3A CN202211233907A CN115419054B CN 115419054 B CN115419054 B CN 115419054B CN 202211233907 A CN202211233907 A CN 202211233907A CN 115419054 B CN115419054 B CN 115419054B
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- outer steel
- head
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- 238000010276 construction Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000011435 rock Substances 0.000 claims abstract description 15
- 239000002689 soil Substances 0.000 claims description 60
- 229910000831 Steel Inorganic materials 0.000 claims description 59
- 239000010959 steel Substances 0.000 claims description 59
- 230000018109 developmental process Effects 0.000 claims description 14
- 238000005553 drilling Methods 0.000 claims description 14
- 230000036346 tooth eruption Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract description 29
- 235000017491 Bambusa tulda Nutrition 0.000 abstract description 29
- 241001330002 Bambuseae Species 0.000 abstract description 29
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract description 29
- 239000011425 bamboo Substances 0.000 abstract description 29
- 239000000463 material Substances 0.000 abstract description 2
- 239000011449 brick Substances 0.000 abstract 4
- 230000003137 locomotive effect Effects 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 15
- 239000002002 slurry Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
Abstract
The invention discloses a karst strong development stratum general pile foundation construction device and a method, which belong to the technical field of general pile foundation construction, and comprise a carrier, wherein a vertical sliding rail is arranged on the carrier, a moving vehicle is movably arranged on the sliding rail, and a rotary digging mechanism is rotatably arranged on the moving vehicle; the rotary digging mechanism comprises: screw axis, fixed section of thick bamboo and slewing mechanism, the vertical rotation setting of fixed section of thick bamboo is in on the locomotive, the coaxial rotation setting of screw axis is in the fixed section of thick bamboo, slewing mechanism sets firmly on the locomotive, the fixed section of thick bamboo lower extreme is equipped with the rotor, the rotor is in row tooth position has seted up into mud mouth, slewing mechanism drives the screw axis is in rotate in the fixed section of thick bamboo and will get into earth in the rotor is led to fixed section of thick bamboo upper end. The rotary brick is used for solving the problems that in the prior art, when the rotary brick is used for rotary digging and taking out, the rotary brick is required to be replaced, and when the rock is broken, the rotary brick is required to be replaced, so that the material cost is improved, and the working efficiency is also reduced.
Description
Technical Field
The invention belongs to the technical field of substantial pile foundation construction, and particularly relates to a substantial pile foundation construction device and method for karst strong development stratum.
Background
The karst strong development stratum has very complex geological structure, the internal trend and trend of the karst strong development stratum are completely irregular and can follow, the karst distribution range is wide, the vertical layering quantity is large, the karst strong development stratum is in a bead shape vertically, the single-layer karst cave layer is thick, the filler is in a soft plastic or flow plastic shape, and meanwhile, the karst ground is possibly accompanied with the characteristics of very rich underground karst water and the like, so that the damage of the karst ground to a pile foundation is huge, and the pile foundation engineering construction is extremely difficult.
Pile group foundations are usually adopted in the design of building pile foundations, pile foundation body sizes are always large, and construction efficiency is low. The existing construction method of pile foundation engineering in karst strong development stratum is that an outer casing is drilled from a soil layer to a stratum, then rotary drilling is added to take out soil and pour soil in the outer casing, then a rotary drilling bit is replaced, the upper end of the outer casing is close to the ground, the outer casing is lengthened, and the outer casing is drilled in a first layer of rock layer to pass through a karst cave to a second layer of stratum. The method needs to continuously switch the rotary head and the outer casing, wastes a great amount of equipment replacement time, and reduces the construction efficiency, so that the construction of the pile foundation formed by the karst strong development stratum is difficult to be ensured in terms of construction period, cost, quality, safety, environmental protection and the like when the conventional method is adopted for construction.
Disclosure of Invention
In view of the above, the invention aims to provide a device and a method for constructing a large amount of pile foundations of a karst strong development stratum, so as to solve the problems that in the prior art, a soil rotating head needs to be replaced when the soil is rotationally excavated, and the rock rotating head needs to be replaced when the rock is broken, so that the material cost is improved, and the working efficiency is reduced.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention discloses a karst strong development stratum general pile foundation construction device, which is characterized in that: the rotary digging device comprises a carrier, wherein a vertical sliding rail is arranged on the carrier, a moving vehicle is movably arranged on the sliding rail, and a rotary digging mechanism is rotatably arranged on the moving vehicle; the rotary digging mechanism comprises: the device comprises a screw shaft, a fixed cylinder and a rotating mechanism, wherein the fixed cylinder is vertically and rotatably arranged on the mobile vehicle, the screw shaft is coaxially and rotatably arranged in the fixed cylinder, the rotating mechanism is fixedly arranged on the mobile vehicle, the lower end of the fixed cylinder is provided with a rotating head, the lower end of the rotating head is provided with a plurality of rows of tooth crushing heads along the radial direction, the rotating head is provided with a mud inlet at the tooth row position, and the rotating mechanism drives the screw shaft to rotate in the fixed cylinder and guide mud entering the rotating head to the upper end of the fixed cylinder;
still including outer steel protects a section of thick bamboo, outer steel protects a section of thick bamboo and is two halves setting, the outside lateral sliding of fixed section of thick bamboo is equipped with a plurality of joints, the joint with be equipped with first spring between the inside outside the fixed section of thick bamboo the outside steel protects a section of thick bamboo be equipped with joint complex joint groove, two halves outer steel protects a section of thick bamboo laminating and is in the fixed section of thick bamboo outside and synthetic tube-shape, make the joint card is gone into the joint groove, the joint upside is the inclined plane setting, when the fixed section of thick bamboo shifts up, the joint shifts out along the inclined plane the joint groove.
Further, the rotating head is arranged at the lower end of the fixed cylinder in a sliding manner, a plurality of guide supporting rods are fixedly arranged at the upper end of the rotating head, a baffle ring is fixedly arranged in the middle section of the guide supporting rods, a plurality of limit grooves are formed in the lower end of the fixed cylinder, the guide supporting rods are arranged in the limit grooves in a sliding manner vertically, second springs are arranged at the upper end and the lower end of the baffle ring, and the second springs are propped against the limit grooves and the baffle ring.
Further, the outer steel casing comprises: the bottom section of thick bamboo and a plurality of connecting cylinder, bottom section of thick bamboo lower extreme is equipped with a plurality of cutting teeth, the outside slope of cutting teeth sets up, and a plurality of connecting cylinder head and tail connect in proper order bottom section of thick bamboo upper end, connecting cylinder both ends with bottom section of thick bamboo upper end all is equipped with the connecting piece that is used for connecting.
Further, a part of soil head is arranged in the bottom end of the rotary head, the part of soil head is conical, the side face of the part of soil head is spiral, and the mud inlet surrounds the periphery of the part of soil head.
Further, a plurality of drainage plates are arranged at the bottom end of the swivel.
Further, the soil collecting device further comprises a collecting inclined plane, wherein the collecting inclined plane is connected to the upper end of the fixed cylinder and used for guiding soil to the ground.
Further, a karst strong development stratum substantial pile foundation method;
the construction method comprises the following steps:
s1, measuring paying-off and pile positioning;
s2, arranging the rotary digging mechanism above the soil layer to be dug, then fixing the two half first layer outer steel casing on the outer layer of the rotary digging mechanism,
the rotary digging mechanism is driven by the rotary digging mechanism to drive the outer steel pile casing to rotate into a pile positioning position, and the verticality is checked in the screwing process;
s3, the bottom cylinder and the rotary digging mechanism drill into the soil layer to reach the rock stratum, and then impact and crush the rock through the rotary head;
s4, taking out soil and pouring the soil in the outer steel casing by the rotary digging mechanism;
s5, splicing another section of connecting cylinder by the outer steel pile casing after the upper end of the outer steel pile casing is about to be turned into a pile hole;
s6, the rotary digging mechanism drives the outer steel pile casing to drill to the designed pile bottom elevation;
s7, pulling out the rotary digging mechanism;
s8, lowering the disposable steel casing with the same height as the drilled hole into the outer steel casing;
s9, pouring concrete to 800mm above the elevation of the designed pile top;
s10, pulling out the outer steel casing, wherein the disposable steel casing is not pulled out.
The invention has the beneficial effects that:
the invention relates to a karst strong development stratum substantial pile foundation construction device and a method, which are high in adaptability of equipment, wherein the follow-up rotary digging equipment of all-steel pile casings is suitable for various high-backfill layers, water-rich layers, mud sandstone layers and complex karst cave geology, and the all-follow-up outer steel pile casings are utilized to drill in poor stratum to form a protection wall, so that the accidents of inclination, extrusion drilling, drilling clamping, burial of drill bits and the like of a rotary digging mechanism are prevented because fillers are liquefied and flow into pile holes when collapsed holes or karst cave are broken down; the drilling speed is high, and the pore-forming efficiency is high. The all-steel pile casing follow-up rotary digging equipment can follow up the wall in the karst strong development stratum so as to achieve rapid pore forming, and the work efficiency is obviously improved. The construction process is safe and environment-friendly. The drilling process is safe and environment-friendly, the site is clean, a large amount of stone clay backfill slurry protection wall is not needed, a slurry pond is not needed to be arranged for slurry circulation, a large amount of slurry outward transportation treatment is not needed, only a sedimentation pond is needed to collect and sediment slurry water which is discharged out of the ground in the pouring process, and only a small amount of drilling sludge and slurry are needed to be transported in the site and transported outward. And no pollution is caused to the groundwater and the surrounding environment. The rotary drilling bit is used for replacing the impact drilling bit, so that the influence on the surrounding existing buildings is minimized, and the damage to the foundation and the structure of the adjacent buildings is avoided.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a schematic view of an apparatus of the present invention;
FIG. 2 is a schematic diagram of the connection of the bottom cartridge and the connecting cartridge according to the present invention;
FIG. 3 is an enlarged schematic view of the invention at A;
FIG. 4 is an enlarged schematic view of the present invention at C;
FIG. 5 is an enlarged view of the swivel of the present invention;
FIG. 6 is an enlarged schematic view of the present invention at B;
FIG. 7 is a bottom view of the swivel of the invention;
FIG. 8 is a schematic diagram of the pre-rotation operation of the present invention;
fig. 9 is a schematic diagram illustrating the operation of the present invention.
The figures are marked as follows: 1. a carrier; 2. a slide rail; 3. a moving vehicle; 4. a screw shaft; 5. a bottom cylinder; 6. a fixed cylinder; 7. a crushing head; 8. a limit groove; 9. a second spring; 10. a guide stay bar; 11. turning the head; 12. a rotating mechanism; 13. tooth arrangement; 14. a first spring; 15. a clamping groove; 16. a clamping joint; 18. a disposable steel casing; 19. a mud inlet; 20. cutting teeth; 21. a reinforcement cage; 22. a connecting cylinder; 23. a soil dividing head; 24. a drainage plate; 25. a baffle ring; 26. a collection tank.
Detailed Description
As shown in fig. 1 to 7, the device and the method for constructing the substantial pile foundation of the karst strong development stratum comprise a carrier 1, wherein a vertical sliding rail 2 is arranged on the carrier 1, a slidable moving vehicle 3 is arranged on the sliding rail 2, and the moving vehicle 3 can vertically slide up and down on the sliding rail 2 through electric driving; a rotary digging mechanism is rotatably arranged on the moving vehicle 3; the rotary digging mechanism comprises: the device comprises a screw shaft 4, a fixed cylinder 6 and a rotating mechanism 12, wherein the fixed cylinder 6 is vertically and rotatably arranged on a moving vehicle 3, the moving vehicle 3 can drive the fixed cylinder 6 to rotate through electric drive, the screw shaft 4 is coaxially and rotatably arranged in the fixed cylinder 6, the rotating mechanism 12 is fixedly arranged on the moving vehicle 3, the lower end of the fixed cylinder 6 is provided with a rotating head 11, the lower end of the rotating head 11 is provided with two rows of teeth 13 along the radial direction, the rotating head 11 is provided with a mud inlet 19 at the position of the teeth 13, and the teeth 13 can scrape mud into the mud inlet 19; the rotating mechanism 12 drives the screw shaft 4 to rotate in the fixed cylinder 6, so that the screw shaft 4 and the fixed cylinder 6 are reversed, and the soil of the screw shaft 4 generates a bottom-up pushing force so as to guide the soil entering the rotating head 11 to the upper end of the fixed cylinder 6;
still include outer steel and protect a section of thick bamboo, outer steel protects a section of thick bamboo and is two halves setting, the length of fixed section of thick bamboo 6 is 6 meters, outer steel protects a section of thick bamboo and includes: the bottom cylinder 5 and the connecting cylinders 22 are arranged at the lower end of the bottom cylinder 5, the cutting teeth are outwards inclined, the connecting cylinders 22 are sequentially connected at the upper end of the bottom cylinder 5 end to end, and connecting pieces for connection are arranged at both ends of the connecting cylinders 22 and the upper end of the bottom cylinder 5; the outside lateral sliding of fixed section of thick bamboo 6 is equipped with a plurality of joints 16, fixed section of thick bamboo 6 establishes one deck joint 16 every 1 meter, joint 16 is the level and encircles in the fixed section of thick bamboo 6 outside, the quantity of every layer of joint 16 is 6, joint 16 with be equipped with first spring 14 between the inside outside fixed section of thick bamboo 6, the inboard of outer steel casing be equipped with joint 16 complex joint groove 15, two halves outer steel casing laminating is in fixed section of thick bamboo 6 outside and synthetic section of thick bamboo number of times make joint 16 card income joint groove 15, joint 16 upside is the inclined plane setting, when fixed section of thick bamboo 6 moves up, the joint shifts out along the inclined plane the joint groove.
The working mode of the device is as follows: firstly, positioning a pile position, and then buckling and clamping the bottom barrels 5 in two halves on the outer side of the rotary digging mechanism, so that the rotary digging mechanism drives the bottom barrels 5 to rotate downwards together in the hole when rotating downwards; the rotary digging mechanism is driven to rotate by the driving trolley 3, and then the rotary digging mechanism is driven to dig in the direction of the pile hole by the driving trolley 3, and the bottom cylinder 5 and the rotary digging mechanism are subjected to drilling construction and the verticality of the steel casing is calibrated. After a bottom cylinder 5 is drilled, hoisting the other two half outer connecting cylinders 22 by using a drilling machine auxiliary winch, buckling the other two half connecting cylinders 22 on the outer side of the fixed cylinder 6, clamping the outer steel protective cylinder drilled into the ground, continuing drilling construction, driving the screw shaft 4 to rotate by using the rotating mechanism, enabling soil screwed into the screw shaft 4 to rotate relative to the rotating head 11 to generate a pushing force from bottom to top, pushing the soil to the top of the fixed cylinder 6 and discharging the soil; when the rotation is stopped, the rotary digging mechanism is pulled out from the ground through the moving vehicle 3, and at the moment, the inclined surface of the clamping connector is contacted with the groove 17, so that the clamping connector is retracted into the clamping groove, the clamping mechanism is not clamped with the outer steel casing, and the outer steel casing is positioned in the hole. When the soil is rotated into the rotary digging mechanism, the rotating mechanism 12 drives the screw shaft 4 to rotate so as to convey the soil to the ground.
The beneficial effect of above-mentioned scheme: the full follow-up outer steel casing is utilized to drill in advance in a bad stratum to form a casing wall, so that the filler is prevented from liquefying and flowing into a pile hole when a collapsed hole or a karst cave is broken down, the drilling speed is high, and the hole forming efficiency is high. In the construction process, the rotary digging mechanism can discharge soil and broken stones without changing different rotary digging heads, so that the cost of the device is reduced, and the construction efficiency is improved; the inclined arrangement makes the pile hole formed by rotation slightly bigger than the outer steel pile casing, so that the friction force between the outer steel pile casing and soil in the pile hole is reduced.
In one embodiment of the present invention, as shown in fig. 5 and fig. 6, the rotating head 11 is slidably disposed at the lower end of the fixed cylinder 6, the rotating head 11 is disposed in a disconnected manner with the fixed cylinder 6, a plurality of guide supporting rods 10 are fixedly disposed at the upper end of the rotating head 11, a stop ring 25 is fixedly disposed at the middle section of the guide supporting rods 10, a plurality of limit grooves 8 are disposed at the lower end of the fixed cylinder 6, the guide supporting rods 10 are vertically slidably disposed in the limit grooves 8, second springs 9 are disposed at the upper and lower ends of the stop ring 25, the second springs 9 are abutted between the limit grooves 8 and the stop ring 25, and the rotating head 11 and the fixed cylinder 6 can be abducted into the fixed cylinder 6 through the guide supporting rods 10, the second springs 9 and the limit grooves 8; the distance between the screw shaft 4 and the rotary head 11 is the same as the disconnection distance between the rotary head 11 and the fixed cylinder 6. The lower end of the screw shaft is away from the ground to avoid collision, but can still contact the soil.
The working principle of the device is as follows: when the crushing head 7 contacts the rock, the guide stay bar 10 is retracted into the limit groove 8 under the stress, the rotating head 11 is driven to retract into the fixed cylinder, and then the second spring 9 is used for rebounding to enable the crushing head 7 to rebound back and forth to impact and crush the rock; by the reciprocating movement, an impact force is generated and a yielding action is achieved, and the retaining ring 25 fixedly connected by the guide stay 10 makes the punching resilience force not to affect the movement of the screw shaft 4.
The beneficial effect of above-mentioned scheme: the second spring 9 and the crushing head 7 can play a role in reciprocating impact crushing on the rock, so that the rotary excavating mechanism can excavate soil layers in a rotary manner and crush the rock, and the time for replacing the rotary excavating head 11 is saved; the rotary digging mechanism can adapt to the complex environment of soil and broken stone; the rock can be impacted reciprocally by the swivel 11 by the resilience of the second spring 9.
In one embodiment of the present invention, as shown in fig. 5 and 7, a soil head 23 is disposed in a bottom end portion of the rotating head 11, the soil dividing head 23 is tapered and has a spiral side surface, the soil inlet 19 surrounds the soil dividing head 23, and two drainage plates 24 are further disposed at the bottom end of the rotating head 11.
The working mode of the device is as follows: soil can be dispersed to the side from the top end of the soil dividing head 23 through the soil dividing head 23, so that the soil enters the soil inlet 19; when the rotary head 11 rotates, the mud on the bottom surface of the rotary head 11 can be drained into the mud inlet 19 through the drainage plate 24.
The beneficial effect of above-mentioned scheme: soil is dispersed to the soil inlet 19 through the soil separating head 23, so that the accumulation of the soil in the middle of the rotary head 11 is avoided, and the soil in the middle of the rotary head 11 cannot influence the entering of the soil inlet 19; the mud on the bottom surface of the rotary head 11 is drained to the mud inlet 19, so that the accumulation of the mud on the bottom surface of the rotary head 11 is avoided.
In one embodiment of the invention, as shown in FIG. 1, the outer steel casing is slidably connected with a collection trough 26.
The working mode of the device is as follows: the soil carried out of the screw shaft 4 is collected and carried out through the 26 inclined surface of the collecting tank.
The beneficial effect of above-mentioned scheme: can collect soil generated by construction.
The construction method comprises the following steps: as shown in fig. 1 to 9;
s1, measuring paying-off and pile positioning;
s2, driving the rotary digging mechanism to drive the first section of outer steel pile casing to rotate and press into a pile positioning position and check verticality;
s3, taking out soil and pouring the soil in the outer steel casing by the rotary digging mechanism;
s4, the outer steel casing is drilled into a stratum in the soil layer until a stratum crushing head 7 is used for carrying out impact crushing on the rock;
s5, splicing another section of outer steel pile casing after the outer steel pile casing is about to be fully rotated into the pile hole;
s6, the rotary digging mechanism drives the outer steel pile casing to drill to the designed pile bottom elevation;
s7, lifting and splicing, namely lowering the disposable steel casing 18 into the outer steel casing, wherein the length of the disposable steel casing 18 is from the top of the designed pile to the bottom of the designed pile;
s8, hanging a reinforcement cage 21;
s9, pouring concrete to 800mm above the elevation of the designed pile top;
s10, pulling out the outer steel casing, and not pulling out the disposable steel casing 18.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (4)
1. The utility model provides a karst strong formation substantial pile foundation construction device that develops which characterized in that: the device comprises a carrier (1), wherein a vertical sliding rail (2) is arranged on the carrier (1), a moving vehicle (3) is movably arranged on the sliding rail (2), and a rotary digging mechanism is rotatably arranged on the moving vehicle (3); the rotary digging mechanism comprises: screw shaft (4), fixed cylinder (6) and rotary mechanism (12), fixed cylinder (6) vertical rotation sets up on mobile cart (3), screw shaft (4) coaxial rotation sets up in fixed cylinder (6), rotary mechanism (12) set firmly on mobile cart (3), fixed cylinder (6) lower extreme is equipped with swivel (11), the lower extreme of swivel (11) is equipped with a plurality of rows of tooth (13) along the radius direction, swivel (11) set up into mud mouth (19) in row tooth (13) position, rotary mechanism (12) drive screw shaft (4) rotate in fixed cylinder (6) and will get into earth in swivel (11) guide fixed cylinder (6) upper end; the novel steel pipe clamp further comprises an outer steel protection barrel, the outer steel protection barrel is arranged in two halves, a plurality of clamping joints (16) are transversely arranged on the outer side of the fixed barrel (6) in a sliding mode, a first spring (14) is arranged between the clamping joints (16) and the inside of the outer side of the fixed barrel (6), clamping grooves (17) matched with the clamping joints (16) are formed in the inner side of the outer steel protection barrel, the two halves of the outer steel protection barrel are attached to the outer side of the fixed barrel (6) and are in a cylindrical shape, the clamping joints (16) are clamped into the clamping grooves (17), the upper sides of the clamping joints (16) are arranged in an inclined plane, and when the fixed barrel (6) moves upwards, the clamping joints (16) move out of the clamping grooves (17) along the inclined plane; the rotary head (11) is arranged at the lower end of the fixed cylinder (6) in a sliding manner, a plurality of guide supporting rods (10) are fixedly arranged at the upper end of the rotary head (11), a baffle ring (25) is fixedly arranged in the middle section of the guide supporting rods (10), a plurality of limit grooves (8) are formed in the lower end of the fixed cylinder (6), the guide supporting rods (10) are vertically arranged in the limit grooves (8) in a sliding manner, second springs (9) are arranged at the upper end and the lower end of the baffle ring (25), and the second springs (9) are propped between the limit grooves (8) and the baffle ring (25); the outer steel casing includes: the device comprises a bottom cylinder (5) and a plurality of connecting cylinders (22), wherein the lower end of the bottom cylinder (5) is provided with a plurality of cutting teeth which are outwards inclined, the connecting cylinders (22) are sequentially connected with the upper end of the bottom cylinder (5) end to end, and connecting pieces for connection are arranged at both ends of the connecting cylinders (22) and the upper end of the bottom cylinder (5); the bottom end of the rotary head (11) is also provided with a plurality of drainage plates (24) and a plurality of crushing heads (7) for crushing the rock.
2. The karst strongly developing strata substantial pile foundation construction apparatus of claim 1, wherein: the soil separating device is characterized in that a part of soil head (23) is arranged in the bottom end of the rotating head (11), the soil separating head (23) is conical, the side face of the soil separating head is spirally arranged, and the soil inlet (19) surrounds the soil separating head (23).
3. The karst strongly developing strata substantial pile foundation construction apparatus of claim 1, wherein: the soil collecting device further comprises a collecting inclined plane, wherein the collecting inclined plane is connected to the upper end of the fixed cylinder (6) and used for guiding soil to the ground.
4. A method for substantially measuring pile foundation of karst strong development stratum; the method is characterized in that: a substantial pile foundation construction device for a karst strongly developing stratum according to claim 1,
the construction method comprises the following steps:
s1, measuring paying-off and pile positioning;
s2, arranging a rotary digging mechanism above a soil layer to be dug, fixing two half first outer steel pile casings on the outer layer of the rotary digging mechanism, and drilling the rotary digging mechanism, so that the rotary digging mechanism drives the outer steel pile casings to be screwed into a pile positioning position, and checking verticality in the screwing process;
s3, after the bottom cylinder (5) and the rotary digging mechanism drill into the soil layer to reach the rock stratum, the rock is impacted and crushed through the rotary head (11);
s4, taking out soil and pouring the soil in the outer steel casing by the rotary digging mechanism;
s5, splicing another section of connecting cylinder (22) by the outer steel pile casing after the upper end of the outer steel pile casing is about to be turned into a pile hole;
s6, the rotary digging mechanism drives the outer steel pile casing to drill to the designed pile bottom elevation;
s7, pulling out the rotary digging mechanism;
s8, lowering a disposable steel casing (18) with the same height as the drilled hole into the outer steel casing;
s9, pouring concrete to 800mm above the elevation of the designed pile top;
s10, pulling out the outer steel casing, wherein the disposable steel casing (18) is not pulled out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211233907.3A CN115419054B (en) | 2022-10-10 | 2022-10-10 | Karst strong development stratum substantial pile foundation construction device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211233907.3A CN115419054B (en) | 2022-10-10 | 2022-10-10 | Karst strong development stratum substantial pile foundation construction device and method |
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| CN115419054A CN115419054A (en) | 2022-12-02 |
| CN115419054B true CN115419054B (en) | 2024-03-19 |
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| CN117868241A (en) * | 2024-03-12 | 2024-04-12 | 北京航天地基工程有限责任公司 | Rotary digging device for building foundation |
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