CN117145410A - Reverse circulation bored pile construction device and construction method - Google Patents
Reverse circulation bored pile construction device and construction method Download PDFInfo
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- CN117145410A CN117145410A CN202311441326.3A CN202311441326A CN117145410A CN 117145410 A CN117145410 A CN 117145410A CN 202311441326 A CN202311441326 A CN 202311441326A CN 117145410 A CN117145410 A CN 117145410A
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- 238000010276 construction Methods 0.000 title claims abstract description 39
- 230000002441 reversible effect Effects 0.000 title claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 240
- 238000004062 sedimentation Methods 0.000 claims abstract description 59
- 238000005553 drilling Methods 0.000 claims abstract description 51
- 239000002893 slag Substances 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims description 63
- 238000000034 method Methods 0.000 claims description 18
- 230000001681 protective effect Effects 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000012876 topography Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 13
- 238000007667 floating Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
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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
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
- F25D31/002—Liquid coolers, e.g. beverage cooler
Abstract
The invention discloses a reverse circulation bored pile construction device and a construction method, wherein the reverse circulation bored pile construction device comprises a slurry tank and a sedimentation tank, a baffle plate is fixedly arranged in the slurry tank, the slurry tank is divided into a slurry outlet space and a slurry return space by the baffle plate, the slurry outlet space is communicated with the slurry return space, and the recycled high-temperature slag-carrying slurry is cooled by utilizing normal-temperature slurry of a slurry outlet pipe, so that the slurry is ensured not to be excessively high in temperature when returning to the slurry tank after being circulated, and the slurry in the slurry tank is not aged rapidly; the overflow pipe is introduced, so that the slurry outlet speed of the slurry outlet pipe is not limited by the drilling speed, slurry in the slurry outlet pipe can flow at a high speed, and the slurry with slag can not be heated too high due to contact with the slurry with slag at a high temperature; when the uneven slurry outlet of the slurry returning pipe causes large fluctuation of the liquid level of the sedimentation tank, the filter residue box at the communicating pipe can be switched to work posture, so that the filter plate rotates to intercept drilling residues until the slurry returning pipe discharges slurry stably and then resets.
Description
Technical Field
The invention belongs to the technical field of bored pile construction, and particularly relates to a reverse circulation bored pile construction device and a construction method.
Background
The reverse circulation bored pile principle is that a drill bit is used for carrying out high-frequency impact on an underground layer to generate crushing and decomposition, and then the drill bit is timely discharged out of a hole in a slurry deslagging mode. The mud flows into the drill hole from the mud pit from the protective barrel water inlet, flows into the hole bottom through the gap between the drill rod and the hole wall by means of gravity, the hole bottom fluid carries drilling slag to be discharged to the sedimentation tank through the drill rod center hole by using the pumping force, and the mud flows into the mud pit for recycling after being purified by the sedimentation tank.
In the reverse circulation bored pile construction process, the problems that the slurry circulation temperature is high, the slurry aging can be quickened and the slurry performance is reduced exist.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a reverse circulation bored pile construction device and a construction method.
The technical scheme adopted by the invention is as follows:
the reverse circulation bored pile construction device comprises a slurry tank and a sedimentation tank, wherein a baffle plate is fixedly arranged in the slurry tank, the baffle plate divides the slurry tank into a slurry outlet space and a slurry return space, the slurry outlet space is communicated with the slurry return space, and the sedimentation tank is positioned at one side, close to the slurry outlet space, of the slurry tank; a protective cylinder is arranged on one side of the sediment Chi Yuan away from the mud pit, and a slag lifting pipe is arranged in the protective cylinder; the utility model discloses a slurry treatment device, including a slurry outlet space, a slurry pump, a slurry outlet pipe, a slurry tank, a sedimentation tank, a slag lifting pipe, a cooling box, a sedimentation tank, a slurry return space, a slurry outlet pipe, a slurry pump, a slurry outlet pipe and a slurry return pipe.
As the optimization of the invention, a chute is fixedly arranged on the slurry tank, the chute is positioned on the side surface of the slurry outlet space, a sliding seat is arranged in the chute in a sliding way, a movable beam is fixedly arranged on the sliding seat, a mounting seat is fixedly arranged on one side of the movable beam, which is close to the slurry tank, and a slurry pump is fixedly arranged on the mounting seat.
As the optimization of the invention, the two ends of the sliding seat are respectively provided with the driven wheel and the driving wheel in a rotating way, one end of the sliding seat, which is close to the driving wheel, is fixedly provided with the moving motor, the output shaft of the moving motor is fixedly provided with the driving wheel, one side of the driving wheel is provided with the driving wheel, the driving wheel is coaxially and fixedly connected with the driving wheel, and the driving wheel are driven by a synchronous belt.
As the preferable mode of the invention, one side of the mounting seat is provided with a rotating shaft, the rotating shaft is rotationally connected with the movable beam, one end of the rotating shaft, which is positioned in the sedimentation tank, is fixedly provided with an agitating blade, one end of the rotating shaft, which is far away from the agitating blade, penetrates through the movable beam, one end of the rotating shaft, which is far away from the agitating blade, is fixedly provided with a control disc, a rotating column is fixedly arranged on the control disc, a connecting rod is rotationally arranged on the rotating column, one end of the connecting rod, which is far away from the rotating column, is provided with a fixed block, the connecting rod is rotationally connected with the fixed block, and the fixed block is fixedly arranged at one end of the sliding groove.
Preferably, a cooling space is arranged in the cooling box, a cooling pipe is arranged in the cooling space, the cooling pipe is fixedly connected with the inner wall of one side of the cooling space, the slurry returning pipe is positioned in the center of the cooling space, the cooling pipe is spirally coated on the periphery of the slurry returning pipe, two ends of the cooling pipe respectively penetrate through two sides of the cooling box, one end of the cooling pipe is communicated with the slurry outlet pipe, a slurry feeding pipe is fixedly arranged at the other end of the cooling pipe, and one end of the slurry feeding pipe far away from the cooling pipe is communicated with the protecting cylinder.
As the preferable mode of the invention, two baffles are fixedly arranged on the inner wall of the pile casing, one ends of the two baffles, which are close to each other, are respectively fixedly provided with a guard board, the slag lifting pipe is positioned between the two guard boards, the length of the baffles is smaller than the height of the pile casing, and the two baffles divide the space between the pile casing and the slag lifting pipe into two parts, namely a slurry inlet space and a slurry overflow space; one side of the pulp outlet pipe is provided with an overflow pipe, the overflow pipe is communicated with the pulp returning space and the pulp overflowing space, the pulp feeding pipe is communicated with the cooling pipe and the pulp feeding space, and the horizontal height of the pulp feeding pipe is smaller than that of the overflow pipe.
As the preference of the invention, one end of the communicating pipe positioned in the sedimentation tank is fixedly provided with a residue pipe, the residue pipe is rotationally provided with a filter plate, the residue pipe is fixedly provided with a residue box, the residue box is internally provided with a working space, one side inner wall of the working space is rotationally provided with a driving shaft, the driving shaft penetrates through one side inner wall of the working space, the driving shaft is fixedly connected with the filter plate, one end of the driving shaft positioned in the working space is provided with a one-way bearing, the inner ring of the one-way bearing is fixedly connected with the driving shaft, the outer ring of the one-way bearing is fixedly provided with a driving gear, one side of the driving gear is provided with a rack, the rack is slidingly arranged on a sliding rail, the sliding rail is fixedly connected with one side inner wall of the working space, and the rack is meshed with the driving gear; and a wire hole is formed in one side of the filter residue box, and penetrates through the working space.
As the preference of the invention, a control space is arranged on one side of the filter residue box far away from the working space, a control box is fixedly arranged on the inner wall of one side of the control space, a torsion spring is arranged in the control box, the outer ring of the torsion spring is fixedly connected with the inner wall of the control box, the inner ring of the torsion spring is fixedly arranged on a control shaft, the control shaft is rotationally connected with the inner wall of one side of the control space, the control shaft penetrates through the inner wall of one side of the control space, the control shaft is fixedly connected with the filter plate, and the control shaft and the driving shaft are respectively positioned at two ends of the filter plate.
A reverse circulation bored pile construction method comprises the following steps:
s1, manufacturing a protective cylinder; the steel pile casing is manufactured by adopting a 10mm steel plate; respectively welding a stiffening rib at the upper end, the lower end and the outer side of the middle part of the pile casing; the diameter of the pile casing is 20cm larger than that of the bored pile diameter sedimentation tank;
s2, burying a protective cylinder; aligning the axis of the pile casing with the center of the pile position marked by measurement, and ensuring that the periphery of the pile casing is tightly contacted with the bottom of the pile casing; a connecting rod is reserved at the top end of the pile casing for 30cm to be used for pulp discharge; the pile casing is vertically fixed at the pile position by adopting a cross center hanging hammer method to correct the pile casing, the bottom and the periphery of the pile casing are overdrawed by 20cm of a sedimentation tank when the pile casing is buried, backfilled clay is tamped in layers, and the pile casing is ensured not to leak mud and not to shift during drilling; the pile casing is straight and stable in position, the top of the pile casing is 30cm higher than the ground connecting rod, and the embedded depth of the pile casing is not less than 2 meters; the deviation between the center of the pile casing and the center of the designed pile is not more than 5cm, and the inclination is not more than 1%;
s3, excavating a mud pit and a sedimentation tank; setting a mud pit and a sedimentation tank according to the site topography combined with the pile foundation position, wherein the mud pit and the sedimentation tank are sized to meet the pile foundation construction requirement; before excavation, measuring and positioning, and then connecting with lime to form a boundary line, wherein accurate freshness is required; excavating by adopting a manual cooperation excavator; color strips are fully paved in the pool for isolation, and Chi Dingkou is 30cm higher than the ground connecting rod; a circle of finished guardrail isolation is arranged around the mud pit and the sedimentation pit, and a safety warning sign, a pile foundation construction process flow and operation regulations are hung;
s4, drilling holes; after the drilling machine is in place accurately, slurry is injected into the pile casing by a slurry pump, low-grade slow drilling is adopted when drilling is started, and the drilling is performed at a normal speed when the drilling is performed to 1m below the pile casing, wherein the drilling speed is adapted to the slurry discharge capacity;
s5, hole cleaning and detection; after the drilling process confirms that the hole depth meets the design requirement, firstly detecting that various indexes such as the aperture, the gradient, the hole depth, the center line deviation and the like meet the requirement, and then cleaning the hole; injecting high-quality slurry into the hole by adopting a slurry pump, and removing slag and cleaning the hole; detecting the hole depth, the hole diameter, the hole position and the sediment thickness by adopting a hole wall measuring instrument after the pile foundation is formed according to the requirements of the technical specification of highway bridge and culvert construction;
s6, lifting the drill and moving the machine; after the hole forming acceptance is qualified, removing a drill bit, a drill rod and other supporting facilities, and moving a drilling machine to the next hole site by adopting an automobile crane;
s7, placing a reinforcement cage and pouring underwater concrete; constructing the reinforcement cage in a mode of connecting the reinforcement cage to the high and sinking mode on the sectional processing site; and cleaning the guide pipe immediately after the concrete is poured, and treating the pile head.
As a preferred mode of the invention, in the steps S3 and S4, the preparation of slurry is carried out in a slurry returning space, and a proper amount of polyacrylamide is added into the slurry returning space to increase the viscosity of the slurry and reduce the water loss rate of the slurry; the mud flows into the mud outlet space, and the mud pump protects the barrel by the mud pump; the mud carrying drilling slag in the drilling process is pumped into a sedimentation tank by a mud pump at a drill bit, the drilling slag is sedimentated by the sedimentation action of the sedimentation tank, and the upper layer mud returns to a slurry returning space through a communicating pipe to complete circulation; during the period, the slurry pump works uninterruptedly, and the slurry overflowed from the protective cylinder flows back into the slurry returning space through the overflow pipe; the high temperature slurry carrying drill slag is cooled as it passes through the cooling box.
The beneficial effects of the invention are as follows: the reverse circulation bored pile construction device and the construction method provided by the invention utilize normal-temperature slurry of the slurry outlet pipe to cool the circulated high-temperature slag-carrying slurry, so that the slurry is ensured not to be too high in temperature and not to be aged rapidly in the slurry tank when returning to the slurry tank after being circulated; the overflow pipe is introduced, so that the slurry outlet speed of the slurry outlet pipe is not limited by the drilling speed, slurry in the slurry outlet pipe can flow at a high speed, and the slurry with slag can not be heated too high due to contact with the slurry with slag at a high temperature; when the uneven slurry outlet of the slurry returning pipe causes large fluctuation of the liquid level of the sedimentation tank, the filter residue box at the communicating pipe can be switched to work posture, so that the filter plate rotates to intercept drilling residues until the slurry returning pipe discharges slurry stably and then resets.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic top view (rotated 180) of the structure of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the A-A direction structure of FIG. 2 according to the present invention;
FIG. 4 is a schematic view of the mud pump and its associated components of FIG. 1 according to the present invention;
FIG. 5 is a schematic view of the sliding seat of FIG. 1 according to the present invention;
FIG. 6 is a schematic elevational view of the present invention of FIG. 5;
FIG. 7 is a schematic view of the cartridge of FIG. 1 and its associated components of the present invention;
FIG. 8 is a schematic diagram of the structure of the residue box of FIG. 1 according to the present invention;
FIG. 9 is a schematic elevational view of the present invention of FIG. 8;
FIG. 10 is a schematic view of the B-B direction structure of FIG. 9 according to the present invention;
FIG. 11 is a schematic top view of the structure of FIG. 8 of the present invention;
FIG. 12 is a schematic view of the C-C direction structure of FIG. 11 in accordance with the present invention;
fig. 13 is a schematic view of the D-D direction structure of fig. 11 according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
Referring to fig. 1-13, a reverse circulation bored pile construction device according to an embodiment of the present invention includes a slurry tank 18 and a sedimentation tank 20, wherein a partition plate 16 is fixedly disposed in the slurry tank 18, the partition plate 16 divides the slurry tank 18 into a slurry outlet space 15 and a slurry return space 17, the slurry outlet space 15 is communicated with the slurry return space 17, and the sedimentation tank 20 is located at one side of the slurry tank 18 close to the slurry outlet space 15; a protective cylinder 11 is arranged on one side of the sedimentation tank 20 far away from the mud pit 18, and a slag lifting pipe 12 is arranged in the protective cylinder 11; the cooling box 13 is arranged between the pile casing 11 and the sedimentation tank 20, the sedimentation tank 20 and the slurry return space 17 are communicated through a communicating pipe 24, the slurry outlet space 15 is communicated with the pile casing 11 through a slurry outlet pipe 22, a slurry pump 37 is arranged in the slurry outlet space 15, the slurry pump 37 is connected with the slurry outlet pipe 22, the sedimentation tank 20 is communicated with the slag lifting pipe 12 through a slurry return pipe 26, and the slurry return pipe 26 penetrates through the cooling box 13. The cooling box 13 reduces the temperature of the high-temperature slurry carrying drill slag for the first time after leaving the ground, so that the influence effect on the original slurry in the sedimentation tank and the slurry tank is minimized.
Advantageously, a chute 32 is fixedly arranged on the mud pit 18, the chute 32 is positioned on the side surface of the mud outlet space 15, a sliding seat 36 is slidably arranged in the chute 32, a moving beam 19 is fixedly arranged on the sliding seat 36, an installation seat 35 is fixedly arranged on one side of the moving beam 19, which is close to the mud pit 18, and a mud pump 37 is fixedly arranged on the installation seat 35. The position of the slurry pump 37 is continuously moved during operation, and the temperature generated during operation can be rapidly dissipated.
Advantageously, the two ends of the sliding seat 36 are respectively rotatably provided with a driven wheel 38 and a driving wheel 39, one end of the sliding seat 36 close to the driving wheel 39 is fixedly provided with a moving motor 40, an output shaft of the moving motor 40 is fixedly provided with a driving wheel 41, one side of the driving wheel 39 is provided with a driving wheel 58, the driving wheel 58 is fixedly connected with the driving wheel 39 coaxially, and the driving wheel 58 and the driving wheel 41 are driven by a synchronous belt 42.
Advantageously, a rotating shaft 33 is arranged on one side of the mounting seat 35, the rotating shaft 33 is rotationally connected with the movable beam 19, an agitating blade 34 is fixedly arranged at one end of the rotating shaft 33 located in the sedimentation tank 20, one end of the rotating shaft 33, which is far away from the agitating blade 34, penetrates through the movable beam 19, a control panel 28 is fixedly arranged at one end of the rotating shaft 33, which is far away from the agitating blade 34, a rotating column 29 is fixedly arranged on the control panel 28, a connecting rod 30 is rotationally arranged on the rotating column 29, a fixed block 31 is arranged at one end of the connecting rod 30, which is far away from the rotating column 29, the connecting rod 30 is rotationally connected with the fixed block 31, and the fixed block 31 is fixedly arranged at one end of the sliding chute 32. The stirring blade 34 rotates during the movement of the mud pump 37 to stir the mud, so that the mud is prevented from depositing at the dead angle of the mud pit.
The cooling box 13 is internally provided with a cooling space 25, the cooling space 25 is internally provided with a cooling pipe 27, the cooling pipe 27 is fixedly connected with the inner wall of one side of the cooling space 25, the slurry returning pipe 26 is positioned in the center of the cooling space 25, the cooling pipe 27 is spirally coated on the periphery of the slurry returning pipe 26, two ends of the cooling pipe 27 penetrate through two sides of the cooling box 13 respectively, one end of the cooling pipe 27 is communicated with the slurry outlet pipe 22, the other end of the cooling pipe 27 is fixedly provided with a slurry feeding pipe 23, and one end of the slurry feeding pipe 23 far away from the cooling pipe 27 is communicated with the protecting cylinder 11. The normal-temperature slurry entering the casing is utilized to cool the high-temperature slurry pumped out of the casing, the cooling cost is reduced, the resources are reasonably utilized, and the problem of high temperature of the reverse circulation slurry is perfectly solved.
The inner wall of the pile casing 11 is fixedly provided with two baffles 43, one ends, close to each other, of the two baffles 43 are respectively fixedly provided with a guard plate 44, the slag lifting pipe 12 is positioned between the two guard plates 44, the length of the baffles 43 is smaller than the height of the pile casing 11, and the two baffles 43 divide the space between the pile casing 11 and the slag lifting pipe 12 into two parts, namely a slurry inlet space and a slurry overflow space; an overflow pipe 21 is arranged on one side of the pulp outlet pipe 22, the overflow pipe 21 is communicated with the pulp returning space 17 and the pulp overflowing space, the pulp feeding pipe 23 is communicated with the cooling pipe 27 and the pulp feeding space, and the horizontal height of the pulp feeding pipe 23 is smaller than that of the overflow pipe 21. In order to avoid the temperature rise of the normal temperature slurry entering the casing, which is in contact with the high temperature slag-carrying slurry for a long time, the overflow pipe 21 is used to reintroduce the overflowed slurry into the slurry pond, so that the flow rate of the slurry in the slurry outlet pipe 22 is not limited and the drilling speed is not limited, and the slurry does not stay in the cooling pipe 27 for a long time.
The filter residue box 14 is fixedly arranged on the filter residue pipe 45, the working space 48 is arranged in the filter residue box 14, a driving shaft 53 is rotationally arranged on the inner wall of one side of the working space 48, the driving shaft 53 penetrates through the inner wall of one side of the working space 48, the driving shaft 53 is fixedly connected with the filter plate 49, one end of the driving shaft 53 in the working space 48 is provided with a one-way bearing 50, the inner ring of the one-way bearing 50 is fixedly connected with the driving shaft 53, a driving gear 54 is fixedly arranged on the outer ring of the one-way bearing 50, one side of the driving gear 54 is provided with a rack 52, the rack 52 is slidably arranged on a sliding rail 51, the sliding rail 51 is fixedly connected with the inner wall of one side of the working space 48, and the rack 52 is meshed with the driving gear 54; a wire hole 46 is formed in one side of the residue box 14, and the wire hole 46 penetrates through the working space 48.
Advantageously, a control space 47 is provided on a side of the filter residue box 14 away from the working space 48, a control box 57 is fixedly provided on an inner wall of a side of the control space 47, a torsion spring 55 is provided in the control box 57, an outer ring of the torsion spring 55 is fixedly connected with an inner wall of the control box 57, an inner ring of the torsion spring 55 is fixedly provided on a control shaft 56, the control shaft 56 is rotatably connected with an inner wall of the control space 47, the control shaft 56 penetrates through an inner wall of a side of the control space 47, the control shaft 56 is fixedly connected with the filter plate 49, and the control shaft 56 and the driving shaft 53 are respectively positioned at two ends of the filter plate 49.
A reverse circulation bored pile construction method comprises the following steps:
s1, manufacturing a protective cylinder; the steel pile casing is manufactured by adopting a 10mm steel plate; respectively welding a stiffening rib at the upper end, the lower end and the outer side of the middle part of the pile casing; the diameter of the pile casing is 20cm larger than that of the bored pile diameter sedimentation tank;
s2, burying a protective cylinder; aligning the axis of the pile casing with the center of the pile position marked by measurement, and ensuring that the periphery of the pile casing is tightly contacted with the bottom of the pile casing; a connecting rod is reserved at the top end of the pile casing for 30cm to be used for pulp discharge; the pile casing is vertically fixed at the pile position by adopting a cross center hanging hammer method to correct the pile casing, the bottom and the periphery of the pile casing are overdrawed by 20cm of a sedimentation tank when the pile casing is buried, backfilled clay is tamped in layers, and the pile casing is ensured not to leak mud and not to shift during drilling; the pile casing is straight and stable in position, the top of the pile casing is 30cm higher than the ground connecting rod, and the embedded depth of the pile casing is not less than 2 meters; the deviation between the center of the pile casing and the center of the designed pile is not more than 5cm, and the inclination is not more than 1%;
s3, excavating a mud pit and a sedimentation tank; setting a mud pit and a sedimentation tank according to the site topography combined with the pile foundation position, wherein the mud pit and the sedimentation tank are sized to meet the pile foundation construction requirement; before excavation, measuring and positioning, and then connecting with lime to form a boundary line, wherein accurate freshness is required; excavating by adopting a manual cooperation excavator; color strips are fully paved in the pool for isolation, and Chi Dingkou is 30cm higher than the ground connecting rod; a circle of finished guardrail isolation is arranged around the mud pit and the sedimentation pit, and a safety warning sign, a pile foundation construction process flow and operation regulations are hung;
s4, drilling holes; after the drilling machine is in place accurately, slurry is injected into the pile casing by a slurry pump, low-grade slow drilling is adopted when drilling is started, and the drilling is performed at a normal speed when the drilling is performed to 1m below the pile casing, wherein the drilling speed is adapted to the slurry discharge capacity;
s5, hole cleaning and detection; after the drilling process confirms that the hole depth meets the design requirement, firstly detecting that various indexes such as the aperture, the gradient, the hole depth, the center line deviation and the like meet the requirement, and then cleaning the hole; injecting high-quality slurry into the hole by adopting a slurry pump, and removing slag and cleaning the hole; detecting the hole depth, the hole diameter, the hole position and the sediment thickness by adopting a hole wall measuring instrument after the pile foundation is formed according to the requirements of the technical specification of highway bridge and culvert construction;
s6, lifting the drill and moving the machine; after the hole forming acceptance is qualified, removing a drill bit, a drill rod and other supporting facilities, and moving a drilling machine to the next hole site by adopting an automobile crane;
s7, placing a reinforcement cage and pouring underwater concrete; constructing the reinforcement cage in a mode of connecting the reinforcement cage to the high and sinking mode on the sectional processing site; and cleaning the guide pipe immediately after the concrete is poured, and treating the pile head.
Advantageously, in steps S3, S4, the preparation of the slurry is carried out in the return space 17, and the addition of a suitable amount of polyacrylamide to the return space 17 increases the viscosity of the slurry, reducing its rate of water loss; the mud flows into the mud outlet space 15, and the mud pump 37 pumps the mud into the pile casing 11; the mud carrying drilling slag in the drilling process is pumped into the sedimentation tank 20 by a mud pump at the drill bit, the drilling slag is sedimentated by the sedimentation action of the sedimentation tank 20, and the upper layer mud returns to the slurry returning space 17 through the communicating pipe 24 to complete circulation; during the period, the slurry pump 37 works uninterruptedly, and the slurry overflowed from the protective cylinder 11 flows back into the slurry returning space 17 through the overflow pipe 21; the high temperature slurry carrying drill slag is cooled as it passes through the cooling box 13.
The working principle of the invention is as follows:
making slurry in a slurry pond 18, pumping the slurry into the casing 11 through a slurry outlet space 15, and returning the slurry to a slurry returning space 17 after the slurry is circulated;
in the discharge space 15, a slurry pump 37 can reciprocate, and a section of hose is arranged in the pipeline connected with the sliding seat 36; the moving motor 40 is started to control the driving wheel 41 to rotate, the driving wheel 41 drives the driving wheel 58 to rotate through the synchronous belt 42, the driving wheel 39 rotates along with the driving wheel 58, the driving wheel 58 contacts the bottom of the sliding chute 32, so that the whole sliding seat 36 slides along the sliding chute 32, the moving beam 19 moves along with the sliding seat 36, and the mounting seat 35 and the slurry pump 37 are driven to move together; the taking of the slurry in the process is more uniform, so that the slurry is prevented from depositing in the slurry outlet space 15;
in the above process, the moving beam 19 moves and the connecting rod 30 drives the control disc 28 to rotate, the control disc 28 rotates along with the rotating shaft 33, the stirring blade 34 drives the rotating shaft 33 to rotate together, and the stirring blade 34 stirs the slurry in the slurry outlet space 15, so that the slurry pumped into the casing 11 is more uniform and flexible;
the slag lifting pipe 12 is directly connected with a lifting pump at the drill bit, mud carrying drilling slag enters the sedimentation tank 20 from the slag lifting pipe 12 and returns to the sedimentation tank 20, cooling is completed in the cooling space 25 when the cooling box 13 is in the way, the cooling adopts contact cooling, the ageing speed of the mud can be avoided, and the circulation effect is improved; the low-temperature pipeline for cooling comes from mud in a normal temperature state, and in the process that the mud is pumped into the casing 11 by the mud outlet pipe 22, the mud passes through the cooling pipe 27 and the mud feeding pipe 23, and the mud serves as cooling liquid when the section of the cooling pipe 27 is cooled;
in the above process, the temperature of the slurry in the cooling pipe 27 will be raised slightly, so that the normal use of the slurry is not affected: the slurry pump 37 does not stop working, the working efficiency is far higher than that of the lifting pump, the flow rate and the flow rate of the slurry entering the bored pile are far higher than those of the slurry flowing out of the bored pile, the slurry in the pile casing 11 is continuously increased, and the slurry higher than the pile casing 11 flows back into the slurry returning space 17 through the overflow pipe 21, so when the drilling speed is low, the slurry in the cooling pipe 27 is not contacted with the drilling slag slurry with higher temperature for a long time, the flow rate of the slurry in the cooling pipe 27 still flows at a high speed according to the original speed, and the slurry entering the pile casing 11 is not influenced by the over-high temperature;
and the baffle 43 in the pile casing 11 makes the mud of small amplitude heating not directly flow back into the slurry return space 17, the mud of small amplitude heating enters the slurry inlet space, the slurry inlet space is not communicated with the slurry overflow space at the upper end of the pile casing 11, and is communicated with the middle section of the pile casing, the inner wall of the bored pile is contacted with the soil layer, and the good heat dissipation effect is achieved, so that the temperature of the mud flowing back into the slurry return space 17 from the slurry overflow space is reduced, and the influence on the mud in the mud pit 18 is avoided.
In addition, the slurry outlet amount and the slurry outlet speed of the slurry returning pipe 26 are limited by the drilling speed and the concrete structure of the underground soil layer, so that the slurry outlet of the slurry returning pipe 26 is difficult to control, the slurry amount in the sedimentation tank 20 is in a non-uniform inlet and outlet state, and the liquid level is easy to have larger fluctuation;
a fine wire is fixed on the rack 52, the fine wire passes through the wire hole 46, a floating ball or a floating plate is fixed at the other end of the fine wire, and the floating ball and the floating plate always have the same trend as the height of the slurry liquid level in the sedimentation tank 20, and the fine wire is always stretched; in a certain range, the change of the liquid level of the slurry pulls the fine line, the fine line pulls the rack 52 to move, the rack 52 slides along the sliding rail 51, the rack 52 drives the driving gear 54 to rotate through meshing, when the liquid level suddenly rises and suddenly falls, the driving gear 54 rotates positively and negatively alternately, the more frequent the change of the liquid level is, the more frequent the positive and negative alternation is, in the process, if the liquid level is high enough to enable the rack 52 to move to the maximum position when the fine line is tensioned, the floating ball is allowed to sink into the slurry;
assuming that the driving gear 54 rotates clockwise to drive the driving shaft 53 to rotate through the one-way bearing 50, the driving gear 54 rotates counterclockwise to drive the driving shaft 53 to rotate through the one-way bearing 50; the basic property of the unidirectional bearing 50 is that the unidirectional inner ring and the unidirectional outer ring are locked, i.e. the inner ring and the outer ring rotate synchronously, while the inner ring and the outer ring can rotate relatively in the other direction, and refer to the flywheel of the rear wheel of the bicycle, i.e. the overrunning clutch;
when the driving gear 54 rotates clockwise, the driving shaft 53 rotates, the driving shaft 53 drives the filter plate 49 to rotate, the filter plate 49 drives the control shaft 56 to rotate, the control shaft 56 causes the torsion spring 55 to accumulate potential energy, when the driving gear 54 rotates anticlockwise, the driving gear 54 does not drive the driving shaft 53 to rotate, but the control shaft 56, the filter plate 49 and the driving shaft 53 rotate under the action of the torsion spring 55, but the rotation speed is limited, the torsion spring 55 drives the control shaft 56 to rotate non-rigidly, and there is a delay, and if the rapid change speed of the liquid level is higher than the rotation delay, namely, the driving gear 54 rotates clockwise rapidly, the filter plate 49 does not rotate too much, or only rotates by a small angle; in summary, when the liquid level rapidly changes, the filter plate 49 rotates/rotates, the rotation angle is always smaller than the rotation angle, the filter plate 49 is finally rotated 90 degrees in a short time, when the filter plate 49 rotates 90 degrees, the filter plate 49 is limited by the limiting protrusion on the inner wall of the filter residue pipe 45, the filter plate 49 cannot continue to rotate, but the trend of continuing to rotate still exists, so that the filter plate 49 can keep a horizontal state, drill residues in slurry are filtered at the center until the liquid level is stable, or the change speed of the liquid level is smaller than the rotation speed, and the filter plate 49 gradually rotates to a vertical state.
When the slurry level in the sedimentation tank 20 is stable, the filter plate 49 is vertical, has no filtering function, and the filter residue pipe 45 is not limited; the siphon principle can lead the slurry in the sedimentation tank 20 and the slurry in the slurry tank 18 to reach an equilibrium state quickly;
if the slurry level in the sedimentation tank 20 changes rapidly, the driving shaft 53 rotates, the driving shaft 53 drives the filter plate 49 to rotate, the filter plate 49 gradually changes into a horizontal state, the horizontal state of the filter plate 49 has a filtering function, at this time, although the speed of slurry flowing into the slurry tank 18 is slow, drilling residues along with fluctuation of the slurry level are isolated by the filter plate 49, the drilling residues cannot enter the slurry tank 18, after the liquid level in the sedimentation tank 20 is stable, under the action of the torsion spring 55, the torsion spring 55 drives the control shaft 56 to rotate, the control shaft 56 drives the filter plate 49 to reset, and the slurry continuously flows into the slurry tank 18 at a high speed.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The foregoing is merely illustrative of the structures of this invention and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the invention or from the scope of the invention as defined in the accompanying claims.
Claims (10)
1. Reverse circulation bored concrete pile construction equipment, its characterized in that: the device comprises a slurry tank and a sedimentation tank, wherein a baffle is fixedly arranged in the slurry tank, the baffle divides the slurry tank into a slurry outlet space and a slurry return space, the slurry outlet space is communicated with the slurry return space, and the sedimentation tank is positioned at one side, close to the slurry outlet space, of the slurry tank; a protective cylinder is arranged on one side of the sediment Chi Yuan away from the mud pit, and a slag lifting pipe is arranged in the protective cylinder; the utility model discloses a slurry treatment device, including a slurry outlet space, a slurry pump, a slurry outlet pipe, a slurry tank, a sedimentation tank, a slag lifting pipe, a cooling box, a sedimentation tank, a slurry return space, a slurry outlet pipe, a slurry pump, a slurry outlet pipe and a slurry return pipe.
2. An inverse circulation bored pile construction apparatus according to claim 1, wherein: the slurry pump is characterized in that a chute is fixedly arranged on the slurry tank, the chute is positioned on the side face of the slurry outlet space, a sliding seat is arranged in the chute in a sliding mode, a movable beam is fixedly arranged on the sliding seat, an installation seat is fixedly arranged on one side, close to the slurry tank, of the movable beam, and the slurry pump is fixedly arranged on the installation seat.
3. An inverse circulation bored pile construction apparatus according to claim 2, wherein: the two ends of the sliding seat are respectively provided with a driven wheel and a driving wheel in a rotating way, one end, close to the driving wheel, of the sliding seat is fixedly provided with a moving motor, an output shaft of the moving motor is fixedly provided with a driving wheel, one side of the driving wheel is provided with a driving wheel, the driving wheel is fixedly connected with the driving wheel in a coaxial way, and the driving wheel are in transmission through a synchronous belt.
4. A reverse circulation bored pile construction apparatus according to claim 3, wherein: one side of mount pad is equipped with the axis of rotation, the axis of rotation with the walking beam rotates to be connected, the axis of rotation is located one end in the sedimentation tank is fixed to be equipped with stirring vane, the axis of rotation is kept away from stirring vane's one end runs through the walking beam, the axis of rotation is kept away from stirring vane's one end is fixed to be equipped with the control panel, the fixed spliced pole that is equipped with on the control panel, the last rotation of spliced pole is equipped with the connecting rod, the connecting rod is kept away from the one end of spliced pole is equipped with the fixed block, the connecting rod with the fixed block rotates to be connected, the fixed setting of fixed block is in the one end of spout.
5. An inverse circulation bored pile construction apparatus according to claim 1, wherein: the cooling box is internally provided with a cooling space, a cooling pipe is arranged in the cooling space, the cooling pipe is fixedly connected with one side inner wall of the cooling space, the slurry returning pipe is positioned in the center of the cooling space, the cooling pipe is spirally coated on the periphery of the slurry returning pipe, two ends of the cooling pipe respectively penetrate through two sides of the cooling box, one end of the cooling pipe is communicated with the slurry outlet pipe, the other end of the cooling pipe is fixedly provided with a slurry feeding pipe, and one end of the cooling pipe far away from the slurry feeding pipe is communicated with the protecting cylinder.
6. An inverse circulation bored pile construction apparatus according to claim 5, wherein: two baffles are fixedly arranged on the inner wall of the pile casing, one ends, close to each other, of the two baffles are respectively fixedly provided with a guard board, the slag lifting pipe is positioned between the two guard boards, the length of the baffles is smaller than the height of the pile casing, and the two baffles divide the space between the pile casing and the slag lifting pipe into two parts, namely a pulp inlet space and a pulp overflow space; one side of the pulp outlet pipe is provided with an overflow pipe, the overflow pipe is communicated with the pulp returning space and the pulp overflowing space, the pulp feeding pipe is communicated with the cooling pipe and the pulp feeding space, and the horizontal height of the pulp feeding pipe is smaller than that of the overflow pipe.
7. An inverse circulation bored pile construction apparatus according to claim 1, wherein: the filter residue box is fixedly arranged on the filter residue pipe, a working space is arranged in the filter residue box, a driving shaft is rotationally arranged on one side inner wall of the working space, the driving shaft penetrates through one side inner wall of the working space, the driving shaft is fixedly connected with the filter plate, one end of the driving shaft, which is positioned in the working space, is provided with a one-way bearing, an inner ring of the one-way bearing is fixedly connected with the driving shaft, a driving gear is fixedly arranged on an outer ring of the one-way bearing, one side of the driving gear is provided with a rack, the rack is arranged on a sliding rail in a sliding mode, the sliding rail is fixedly connected with one side inner wall of the working space, and the rack is meshed with the driving gear; and a wire hole is formed in one side of the filter residue box, and penetrates through the working space.
8. An inverse circulation bored pile construction apparatus according to claim 7, wherein: the filter residue box is kept away from one side of working space is equipped with the control space, the fixed control box that is equipped with on one side inner wall of control space, be equipped with the torsional spring in the control box, the outer lane of torsional spring with the inner wall fixed connection of control box, the inner circle of torsional spring is fixed to be set up on the control shaft, the control shaft with one side inner wall of control space rotates to be connected, the control shaft runs through one side inner wall of control space, the control shaft with filter fixed connection, the control shaft with the drive shaft is located respectively the both ends of filter.
9. The reverse circulation bored pile construction method is characterized by comprising the following steps of:
s1, manufacturing a protective cylinder; the steel pile casing is manufactured by adopting a 10mm steel plate; respectively welding a stiffening rib at the upper end, the lower end and the outer side of the middle part of the pile casing; the diameter of the pile casing is 20cm larger than that of the bored pile diameter sedimentation tank;
s2, burying a protective cylinder; aligning the axis of the pile casing with the center of the pile position marked by measurement, and ensuring that the periphery of the pile casing is tightly contacted with the bottom of the pile casing; a connecting rod is reserved at the top end of the pile casing for 30cm to be used for pulp discharge; the pile casing is vertically fixed at the pile position by adopting a cross center hanging hammer method to correct the pile casing, the bottom and the periphery of the pile casing are overdrawed by 20cm of a sedimentation tank when the pile casing is buried, backfilled clay is tamped in layers, and the pile casing is ensured not to leak mud and not to shift during drilling; the pile casing is straight and stable in position, the top of the pile casing is 30cm higher than the ground connecting rod, and the embedded depth of the pile casing is not less than 2 meters; the deviation between the center of the pile casing and the center of the designed pile is not more than 5cm, and the inclination is not more than 1%;
s3, excavating a mud pit and a sedimentation tank; use of an inverse circulation bored pile construction apparatus according to any one of claims 1-8, setting up a slurry pond and a sedimentation pond according to the site topography in combination with the pile foundation position, the slurry pond and sedimentation pond being sized to meet the pile foundation construction needs; before excavation, measuring and positioning, and then connecting with lime to form a boundary line, wherein accurate freshness is required; excavating by adopting a manual cooperation excavator; color strips are fully paved in the pool for isolation, and Chi Dingkou is 30cm higher than the ground connecting rod; a circle of finished guardrail isolation is arranged around the mud pit and the sedimentation pit, and a safety warning sign, a pile foundation construction process flow and operation regulations are hung;
s4, drilling holes; after the drilling machine is in place accurately, slurry is injected into the pile casing by a slurry pump, low-grade slow drilling is adopted when drilling is started, and the drilling is performed at a normal speed when the drilling is performed to 1m below the pile casing, wherein the drilling speed is adapted to the slurry discharge capacity;
s5, hole cleaning and detection; after the drilling process confirms that the hole depth meets the design requirement, firstly detecting that various indexes such as the aperture, the gradient, the hole depth, the center line deviation and the like meet the requirement, and then cleaning the hole; injecting high-quality slurry into the hole by adopting a slurry pump, and removing slag and cleaning the hole; detecting the hole depth, the hole diameter, the hole position and the sediment thickness by adopting a hole wall measuring instrument after the pile foundation is formed according to the requirements of the technical specification of highway bridge and culvert construction;
s6, lifting the drill and moving the machine; after the hole forming acceptance is qualified, removing a drill bit, a drill rod and other supporting facilities, and moving a drilling machine to the next hole site by adopting an automobile crane;
s7, placing a reinforcement cage and pouring underwater concrete; constructing the reinforcement cage in a mode of connecting the reinforcement cage to the high and sinking mode on the sectional processing site; and cleaning the guide pipe immediately after the concrete is poured, and treating the pile head.
10. A reverse circulation bored pile construction method according to claim 9, wherein: in the steps S3 and S4, the preparation of the slurry is carried out in a slurry returning space, and a proper amount of polyacrylamide is added into the slurry returning space to increase the viscosity of the slurry and reduce the water loss rate of the slurry; the mud flows into the mud outlet space, and the mud pump protects the barrel by the mud pump; the mud carrying drilling slag in the drilling process is pumped into a sedimentation tank by a mud pump at a drill bit, the drilling slag is sedimentated by the sedimentation action of the sedimentation tank, and the upper layer mud returns to a slurry returning space through a communicating pipe to complete circulation; during the period, the slurry pump works uninterruptedly, and the slurry overflowed from the protective cylinder flows back into the slurry returning space through the overflow pipe; the high temperature slurry carrying drill slag is cooled as it passes through the cooling box.
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