CN110043205B - Secondary hole cleaning method for cast-in-place pile - Google Patents
Secondary hole cleaning method for cast-in-place pile Download PDFInfo
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- CN110043205B CN110043205B CN201910407127.8A CN201910407127A CN110043205B CN 110043205 B CN110043205 B CN 110043205B CN 201910407127 A CN201910407127 A CN 201910407127A CN 110043205 B CN110043205 B CN 110043205B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002002 slurry Substances 0.000 claims abstract description 171
- 239000002893 slag Substances 0.000 claims abstract description 76
- 239000002245 particle Substances 0.000 claims abstract description 40
- 238000011049 filling Methods 0.000 claims abstract description 11
- 238000005192 partition Methods 0.000 claims description 37
- 238000007599 discharging Methods 0.000 claims description 33
- 238000004062 sedimentation Methods 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000010802 sludge Substances 0.000 claims description 10
- 239000011362 coarse particle Substances 0.000 claims description 9
- 239000010419 fine particle Substances 0.000 claims description 6
- 238000001556 precipitation Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
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- 230000008859 change Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 35
- 238000010276 construction Methods 0.000 abstract description 13
- 230000002829 reductive effect Effects 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract description 3
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- 230000009471 action Effects 0.000 description 10
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- 238000009434 installation Methods 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Treatment Of Sludge (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of secondary hole cleaning of cast-in-place piles, and discloses a secondary hole cleaning method of a cast-in-place pile, which comprises a pile hole which is subjected to primary hole cleaning, a submersible electric pump, a swirler and a settling tank; the method comprises the following steps: (1) installing a submersible electric pump; (2) erecting a swirler; (3) the cyclone separates small-particle slurry and large-particle slurry, the large-particle slurry is discharged from the slag discharge port, and the small-particle slurry overflows from the overflow port and flows to the settling tank through the second conveying pipe; (4) the backflow pipe is communicated with the pile hole, and the high-quality slurry flows back to the pile hole through the backflow pipe; (5) starting the submersible electric pump and the slurry cyclone. The submerged electric pump and the swirler are used, the weight is light, the connection is convenient, the load applied to the platform by secondary hole cleaning construction is reduced, the safety and the reliability are realized, the hole cleaning efficiency is high, the adverse effect of hole collapse caused by long-time hole cleaning is avoided, the pile forming quality is ensured, in addition, the hole cleaning time is short, the slurry using amount is small, and the requirement of the overwater operation platform for realizing the secondary hole cleaning construction of the filling pile is met.
Description
Technical Field
The invention relates to the technical field of secondary hole cleaning of a cast-in-place pile, in particular to a secondary hole cleaning method of a cast-in-place pile.
Background
The secondary hole cleaning of the cast-in-place pile is a key process in the pile-forming construction process, the traditional secondary hole cleaning method comprises hole cleaning modes such as positive circulation, pumping reverse circulation, gas-lift reverse circulation and the like, and a secondary hole cleaning system comprises a slurry circulation groove, a sedimentation tank, a slurry tank and the like.
The positive circulation secondary hole cleaning needs a 3PN slurry pump to generate slurry circulation, the pumping reverse circulation hole cleaning needs a large 6BS sand pump to generate vacuum to form reverse circulation, and the gas lift reverse circulation hole cleaning needs an air compressor to pump to generate vacuum to form reverse circulation.
The mud sedimentation tank and the mud circulation tank are generally 1.5-2.0 times of the theoretical volume of a pile hole, and a large amount of field is occupied. In order to improve the effect of slurry circulation, a large-scale slurry purifier is often used for filtering and separating slurry and slag during secondary hole cleaning.
For foundation engineering cast-in-place piles for constructing bridges, wharfs and offshore facilities on the above-water platform, due to the influence of the above-water platform and the limited operation platform, the bearing capacity of the operation platform is limited, and the arrangement of large-scale hole cleaning equipment and a slurry circulation system is difficult to meet; on an above-water operation platform, a safe, green, convenient and reliable method for completing secondary hole cleaning of a cast-in-place pile is lacked, and the hole cleaning quality and effect cannot be met.
Disclosure of Invention
The invention aims to provide a secondary hole cleaning method for a cast-in-place pile, and aims to solve the problem that in the prior art, a water operation platform cannot realize secondary hole cleaning of the cast-in-place pile.
The invention is realized in this way, the secondary hole cleaning method of the cast-in-place pile comprises the pile hole, the submersible electric pump, the swirler and the settling tank which are subjected to primary hole cleaning; the method comprises the following specific steps:
(1) the submersible electric pump is installed, a filling conduit is arranged in the pile hole, the bottom of the submersible electric pump is connected with the upper part of the filling conduit, and the lower part of the filling conduit extends and is embedded into slurry in the pile hole;
(2) erecting the cyclone; the cyclone is respectively connected with a first conveying pipe and a second conveying pipe, two ends of the first conveying pipe are respectively communicated with the cyclone and the submersible electric pump, and the second conveying pipe is respectively communicated with the cyclone and the settling tank;
(3) the cyclone is provided with a slag discharge port and an overflow port, the slurry comprises small-particle slurry and large-particle slurry, the cyclone separates the small-particle slurry and the large-particle slurry, the large-particle slurry is discharged from the slag discharge port, and the small-particle slurry overflows from the overflow port and flows to a settling tank through the second conveying pipe;
(4) the settling tank is connected with a return pipe, the return pipe is communicated with the pile hole, the small-particle slurry is settled and filtered through the settling tank to form high-quality slurry, and the high-quality slurry flows back to the pile hole through the return pipe;
(5) and starting the submersible electric pump and the slurry cyclone to realize secondary hole cleaning of the pile hole.
Further, the submersible electric pump comprises a slag discharging sleeve, the slag discharging sleeve is provided with a discharging port and a discharging port, and the slag discharging sleeve is arranged in a conical shape with a small front part and a large rear part along the direction from the discharging port to the discharging port; the perfusion conduit is communicated with the discharge port, and the discharge port is communicated with the first conveying pipe.
Further, the slag discharging sleeve is provided with a heating ring for heating in an electrified mode, and the heating ring is arranged at the front end of the slag discharging sleeve.
Further, the swirler includes barrel and cone, the barrel with the cone is integrated into one piece, the barrel intercommunication the cone, the upper portion of cone is connected the barrel, along top-down, the cone is the toper form of big end down and arranges, the upper portion of barrel forms the overflow mouth, the lower part of cone forms the row cinder notch.
Further, the cyclone comprises a slurry inlet pipe, one end of the slurry inlet pipe is communicated with the first conveying pipe, and the other end of the slurry inlet pipe is communicated with the cylinder; the other end of the pulp inlet pipe forms a communicating section, and the communicating section is obliquely arranged along the axial direction; the barrel comprises a barrel wall, the communicating section comprises a communicating wall, and the barrel wall is attached to the communicating wall.
Further, the cone comprises a cone wall, and the cone wall is in butt joint with the cylinder wall; the inner part of the swirler is provided with convex strips, and the convex strips are spirally arranged along the circumference of the swirler from top to bottom; the convex strip is fixed on the cylinder wall and extends to the conical wall in a surrounding spiral mode.
Furthermore, the cylinder body is arranged in a cylindrical shape and is provided with a first central axis, and the overflow outlet is arranged opposite to the first central axis of the cylinder body; the cone is provided with a second central axis, and the slag discharging port is arranged opposite to the second central axis of the cylinder body; the first central axis is aligned with the second central axis.
Furthermore, the settling tank comprises a tank body, the tank body is provided with a slurry inlet, a first overflow port, a second overflow port and a slurry outlet, the slurry inlet is communicated with the second conveying pipe, and the slurry outlet is communicated with the return pipe; the box includes first settling tank, second settling tank and third settling tank, the second conveyer pipe passes through advance the thick liquid mouth intercommunication first settling tank, through first overflow mouth makes the process mud behind the first settling tank sedimentation treatment get into the second settling tank, through the second overflow mouth makes the process mud behind the second settling tank sedimentation treatment get into the third settling tank, through the mud behind the third settling tank sedimentation treatment passes through the play thick liquid mouth gets into the back flow.
Further, the box body is provided with a first partition plate and a second partition plate, the first partition plate and the second partition plate partition the box body to form the first settling tank, the second settling tank and the third settling tank which are not communicated with each other, the first overflow port is formed at the upper part of the first partition plate, and the second overflow port is formed at the upper part of the second partition plate; and the first overflow ports and the second overflow ports are arranged in a staggered manner along the arrangement direction of the first partition plates and the second partition plates.
Furthermore, a first lifting plate, a first spring and a first slag outlet which are horizontally arranged are arranged in the first settling tank, the first lifting plate and the first partition plate are vertically arranged, the first settling tank is provided with a first tank wall, the first tank wall and the first partition plate are arranged in a surrounding manner to form a first lower end opening, and the first lifting plate blocks the first lower end opening; the one end of first spring is fixed arrangement, the other end of first spring with first lifter plate is fixed arrangement, works as first lifter plate removes to be in when first slag notch below, sediment back mud sediment passes through first slag notch is discharged.
Compared with the prior art, the secondary hole cleaning method for the cast-in-place pile provided by the invention has the advantages that when the secondary hole cleaning is started, the submersible electric pump pumps and conveys slurry in the pile hole to the first conveying pipe and then to the cyclone through the cast-in-place pipe, the separation of small-particle slurry and large-particle slurry is realized through the cyclone, the large-particle slurry is discharged from the slag discharge port, the small-particle slurry overflows from the overflow port and is conveyed to the settling tank through the second conveying pipe, and high-quality slurry subjected to settling treatment by the settling tank flows back into the pile hole through the return pipe; like this, use submerged motor pump and swirler, light in weight, connect conveniently, greatly reduced the clear hole of secondary construction load that the platform was applyed, safe and reliable, and clear hole is efficient, has avoided clear hole for a long time to lead to the adverse effect in hole that collapses, guarantees to become the stake quality, in addition, clear hole time is short, and the mud use amount is little, and comprehensive cost greatly reduced to satisfy the clear hole of operation platform realization bored concrete pile secondary on water construction.
Drawings
FIG. 1 is a schematic construction flow diagram of a secondary hole cleaning method for a cast-in-place pile provided by the invention;
FIG. 2 is a schematic perspective view of a secondary hole cleaning method for a cast-in-place pile according to the present invention;
fig. 3 is a schematic perspective view of a submersible electric pump of the secondary hole cleaning method for a cast-in-place pile provided by the invention;
FIG. 4 is a schematic perspective view of a cyclone of the secondary hole cleaning method for cast-in-place piles according to the present invention;
FIG. 5 is a schematic perspective view of a rib of a swirler of the secondary hole cleaning method for a cast-in-place pile provided by the present invention;
FIG. 6 is a schematic perspective view of a settling tank of the secondary hole cleaning method for cast-in-place piles according to the present invention;
FIG. 7 is a schematic perspective view of a first baffle plate of the secondary hole cleaning method for cast-in-place piles according to the present invention;
fig. 8 is a schematic perspective view of a first lifting plate of the secondary hole cleaning method for a cast-in-place pile according to the present invention;
fig. 9 is a schematic circuit communication diagram of the secondary hole cleaning method for the cast-in-place pile provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-9, preferred embodiments of the present invention are provided.
The invention provides a secondary hole cleaning method for a cast-in-place pile, which is used for solving the problem that a water operation platform cannot realize secondary hole cleaning of the cast-in-place pile.
The secondary hole cleaning method for the cast-in-place pile comprises the steps of firstly cleaning a pile hole 10, a submersible electric pump 20, a swirler 30 and a settling tank 40; the method comprises the following specific steps:
(1) installing a submersible electric pump 20, wherein a filling conduit 50 is arranged in the pile hole 10, the bottom of the submersible electric pump 20 is connected with the upper part of the filling conduit 50, and the lower part of the filling conduit 50 extends and is embedded into slurry in the pile hole 10;
(2) erecting a swirler 30; the cyclone 30 is connected with a first delivery pipe 91 and a second delivery pipe 92 respectively, two ends of the first delivery pipe 91 are communicated with the cyclone 30 and the submersible electric pump 20 respectively, and the second delivery pipe 92 is communicated with the cyclone 30 and the settling tank 40 respectively;
(3) the cyclone 30 is provided with a slag discharge port 32 and an overflow port 31, the slurry comprises small-particle slurry and large-particle slurry, the cyclone 30 separates the small-particle slurry from the large-particle slurry, the large-particle slurry is discharged from the slag discharge port 32, and the small-particle slurry overflows from the overflow port 31 and flows to the settling tank 40 through a second conveying pipe 92;
(4) the settling tank 40 is connected with a return pipe 90, the return pipe 90 is communicated with the pile hole 10, small-particle slurry is settled and filtered through the settling tank 40 to form high-quality slurry, and the high-quality slurry flows back to the pile hole 10 through the return pipe 90;
(5) and starting the submersible electric pump 20 and the slurry swirler 30 to realize secondary hole cleaning of the pile hole 10.
In the secondary hole cleaning method for the cast-in-place pile, when the secondary hole cleaning is started, the submersible electric pump 20 pumps and conveys the slurry in the pile hole 10 to the first conveying pipe 91 through the cast-in-place pipe 50, then conveys the slurry to the cyclone 30, the cyclone 30 is used for separating small-particle slurry from large-particle slurry, the large-particle slurry is discharged from the slag discharge port 32, the small-particle slurry overflows from the overflow port 31 and is conveyed to the settling tank 40 through the second conveying pipe 92, and the high-quality slurry after the sedimentation treatment of the settling tank 40 flows back into the pile hole 10 through the return pipe 90; like this, use submerged motor pump 20 and swirler 30, light in weight, connect convenient, greatly reduced the secondary clear hole construction load that the platform was applyed, safe and reliable, and clear hole is efficient, has avoided the long-time clear hole to lead to the adverse effect in the hole that collapses, guarantees to become the stake quality, in addition, clear hole time is short, and the mud use amount is little, comprehensive cost greatly reduced to satisfy the operation platform on water and realize the clear hole construction of bored concrete pile secondary.
In this embodiment, the submersible electric pump 20 includes a slag tapping sleeve 21, the slag tapping sleeve 21 has a discharge port and a discharge port, and the slag tapping sleeve 21 is arranged in a tapered shape with a small front part and a large rear part along a direction from the discharge port to the discharge port; the perfusion conduit 50 is in communication with the discharge port, which is in communication with the first delivery tube 91; under the action of the slag tapping sleeve 21, the flow rate of the slurry is increased, so that the submersible electric pump 20 can conveniently pump the slurry and convey the slurry to the first conveying pipe 91.
The slag discharging sleeve 21 is provided with a heating ring 22 which is heated by electrification, and the heating ring 22 is arranged at the front end of the slag discharging sleeve 21; under the action of the heating ring 22, the slurry is prevented from being condensed, so that the slag discharging sleeve 21 is blocked, and the slurry conveying is prevented from being influenced.
The front end of the slag discharging sleeve 21 forms a row of inlets, the rear end of the slag discharging sleeve 21 forms a discharge port, the discharge port is communicated with the first conveying pipe 91, and the first conveying pipe 91 is arranged, so that the heat generated by the heating ring 22 cannot cause the damage of the first conveying pipe 91, the slurry conveying leakage is caused, and the slurry conveying is influenced.
The first delivery pipe 91 and the second delivery pipe 92 are made of rubber tubes and made of rubber materials, so that slurry delivery is guaranteed, the cost is low, and meanwhile, the first delivery pipe 91 is convenient to connect with the submersible electric pump 20 and the cyclone 30, and the second delivery pipe 92 is convenient to connect with the cyclone 30 and the settling tank 40.
The heating ring 22 is electrically connected to the submersible electric pump 20, and the electric wires are used to conduct the circuit between the heating ring 22 and the submersible electric pump 20.
When the submersible electric pump 20 is installed, a connector with the same diameter as the perfusion conduit 50 is welded at the bottom of the submersible electric pump 20, the connector is placed near the liquid level of the orifice after being connected with the perfusion conduit 50, and the bottom of the perfusion conduit 50 is 30-50 cm away from the bottom of the orifice; when the submersible electric pump 20 works, the motor shaft drives the water pump impeller to rotate, energy is transferred to slurry medium, a certain flow velocity is generated, solid is driven to flow, slurry is conveyed, slurry and sediments at the bottom of a hole are directly pumped out of the pile hole 10 through the filling guide pipe 50, and reverse circulation of the slurry is formed.
The rear end of the slag discharging sleeve 21 is provided with a driving fan, and when the submersible electric pump 20 pumps mud through the slag discharging sleeve 21, the driving fan is impacted, so that the driving fan stirs the mud, and the discharge pressure of the mud is convenient for discharging the mud.
Furthermore, the driving fan comprises a plurality of driving blades and a fan body, the driving blades are arranged in a surrounding manner along the fan body, and the driving blades and the fan body are fixedly arranged; the driving blades are obliquely arranged, so that slurry can impact the blades to enable the driving fan to rotate, and wind power is generated to drive the slurry in the first conveying pipe 91 to be conveyed.
The submersible electric pump 20 comprises a suction chamber and a return pipe 26, the discharge inlet of the tapping sleeve 21 being in communication with the suction chamber; a cover body 23 is arranged in the suction cavity, the cover body 23 forms a plurality of through holes 24, high-quality slurry passes through the through holes 24, the cover body 23 divides the suction cavity into an outer cavity 25 and an inner cavity, the slag discharging sleeve 21 is communicated with the inner cavity, one end of a return pipe 26 is communicated with the outer cavity 25, and the other end of the return pipe 26 is communicated with the pile hole 10; therefore, in the later stage of hole cleaning, the cover body 23 is driven to rotate, high-quality slurry directly enters the outer cavity 25 through the cover body 23, and then directly flows back to the pile hole 10 through the outer cavity 25, and is directly conveyed back to the pile hole 10 under the condition that sediment at the bottom of the hole is basically removed, so that the secondary hole cleaning efficiency is further improved.
The slurry passing through the cover body 23 flows to the cyclone 30 from the discharge inlet of the slag discharging sleeve 21 to be separated, thereby ensuring the hole cleaning effect.
Specifically, the cyclone 30 includes a barrel and a cone, the barrel and the cone are integrally formed, the barrel is communicated with the cone, the upper portion of the cone is connected with the barrel, the cone is arranged in a shape of a cone with a large upper portion and a small lower portion from top to bottom, an overflow port 31 is formed at the upper portion of the barrel, and a slag discharge port 32 is formed at the lower portion of the cone.
When slurry enters the cyclone 30 along the tangential direction through the slurry inlet pipe 33 under a certain pressure and flow rate by the submersible electric pump 20, the slurry rapidly rotates along the cylinder wall and the cone wall to generate strong three-dimensional elliptical strong rotation shearing turbulent flow motion, because of the particle size difference (or density difference) between coarse particles and fine particles, the coarse particles are subjected to different magnitudes of centrifugal force, centripetal buoyancy, liquid drag force and the like, under the action of the centrifugal force and gravity, the coarse particles move to the wall by overcoming the hydraulic resistance, and under the combined action of the gravity of the coarse particles and the fine particles, the fine particles and most of the slurry spirally move downwards along the wall, and the fine particles and most of the slurry are subjected to small centrifugal force, are not close to the cylinder wall, and do rotary motion along with the slurry; under the push of subsequent slurry, the particle size of the particles is larger and larger from the center to the wall of the device, and layered arrangement is formed; as the slurry flows from the cylindrical portion to the conical portion of the cyclone 30, the flow cross section becomes smaller and smaller, and the inner layer slurry containing a large amount of fine particles has to change direction under the contraction and compression of the outer layer slurry and moves upward to form an inner rotational flow, and is discharged from the overflow port 31; the coarse particles continue to move downwards along the wall of the separator in a spiral manner to form an outer rotational flow, and finally are discharged from the slag discharge port 32, so that the purpose and the effect of separating slurry from slag are achieved.
The cyclone 30 comprises a slurry inlet pipe 33, one end of the slurry inlet pipe 33 is communicated with the first conveying pipe 91, and the other end of the slurry inlet pipe 33 is communicated with the cylinder; the other end of the pulp inlet pipe 33 forms a communicating section which is obliquely arranged along the axial direction; the barrel comprises a barrel wall, the communication section comprises a communication wall, and the barrel wall is attached to the communication wall; thus, the slurry enters the cyclone 30 through the slurry inlet pipe 33, facilitating the slurry to rotate rapidly along the wall of the cylinder.
The other end of the slurry inlet pipe 33 is connected with the cyclone 30 along the tangential direction, so that the speed increasing effect is achieved, and meanwhile, slurry can rotate along the cylinder wall fast and can be separated conveniently.
The cone comprises a cone wall, and the cone wall is in butt joint with the cylinder wall; the interior of the swirler 30 is provided with a convex strip 34, and the convex strip 34 is spirally arranged around the circumference of the swirler 30 from top to bottom; the convex strip 34 is fixed on the cylinder wall and extends to the conical wall in a surrounding and spiral way; under the action of the convex strips 34, the slurry is guided, so that the slurry can rotate along the cylinder wall and the conical wall quickly, and the slurry can be separated conveniently.
The ribs 34 are arranged in a convex manner in the direction away from the cylinder wall or cone wall, ensuring the guiding effect of the ribs 34.
The convex strip 34 comprises a transverse part and an inclined part, the transverse part extends along the direction departing from the cylinder wall, the bottom of the inclined part is connected with the transverse part, and the top of the inclined part is upwards and obliquely arranged; thus, large-particle slurry is prevented from being retained on the convex strips 34, and the hole cleaning efficiency and effect are prevented from being influenced.
The barrel is arranged in a cylindrical shape and is provided with a first central axis, and the overflow outlet 31 is arranged opposite to the first central axis of the barrel; the cone is provided with a second central axis, and the slag discharging port 32 is arranged opposite to the second central axis of the cylinder body; the first central axis is aligned with the second central axis.
Due to the arrangement, after the slurry is rotationally separated, under the action of centrifugal force and gravity, the coarse-particle slurry overcomes hydraulic resistance and moves along the cylinder wall and the conical wall, and under the combined action of self gravity, the coarse-particle slurry spirally moves downwards and finally converges on the second central axis at the bottom of the cone, so that the coarse-particle slurry is discharged outwards through the slag discharge port 32.
Furthermore, because of the small centrifugal force, the fine and small particles and most of the slurry do not rotate with the slurry near the cylinder wall, and the small particle slurry moves upwards under the contraction and compression of the outer layer slurry to form an inner rotational flow, and is discharged from the overflow port 31 and conveyed to the settling tank 40.
The overflow port 31 is provided with a filter screen for further filtering the small-particle slurry, thereby improving the hole cleaning effect.
In this embodiment, the settling tank 40 comprises a tank body having a slurry inlet 44, a first overflow port 48, a second overflow port and a slurry outlet 45, the slurry inlet being communicated with a second delivery pipe 92, and the slurry outlet being communicated with a return pipe 90; the box includes first settling tank 41, second settling tank 42 and third settling tank 43, and second conveyer pipe 92 communicates first settling tank 41 through advancing thick liquid mouth 44, makes the mud after the sedimentation treatment of first settling tank 41 get into second settling tank 42 through first overflow mouth 48, makes the mud after the sedimentation treatment of second settling tank 42 get into third settling tank 43 through the second overflow mouth, and the mud after the sedimentation treatment of third settling tank 43 gets into back flow 90 through mud outlet 45.
The cyclone 30 transfers the separated mud to the first settling tank 41 through the second transfer pipe 92, so that the mud is primarily settled in the first settling tank 41, the mud settled in the lower part of the first settling tank 41 is disposed in the upper part of the primary settling tank, the sewage treated by the primary settling enters the second settling tank 42 through the first overflow port 48, the mud treated by the primary settling is secondarily settled in the second settling tank 42, the mud settled in the lower part of the second settling tank 42 is disposed in the upper part of the second settling tank 42, the mud treated by the secondary settling enters the third settling tank 43 through the second overflow port, the mud settled in the lower part of the third settling tank 43 is disposed in the lower part of the third settling tank 43, the mud settled in the third settling tank 43 enters the return pipe 90 through the mud outlet 45, and returns to the pile hole 10, thereby settling and purifying the mud, the hole cleaning effect is improved.
Furthermore, the box body is provided with a first partition plate 46 and a second partition plate 47, the first partition plate 46 and the second partition plate 47 partition the box body to form a first settling tank 41, a second settling tank 42 and a third settling tank 43 which are not communicated with each other, a first overflow port 48 is formed at the upper part of the first partition plate 46, and a second overflow port is formed at the upper part of the second partition plate 47; and the mud is subjected to multiple sedimentation treatment, the hole cleaning effect is improved, and the subsequent pile forming quality is ensured.
Along the arrangement direction of the first partition plate 46 and the second partition plate 47, the first overflow port 48 and the second overflow port are arranged in a staggered manner; the advantage of this arrangement is that when the primary sedimentation processed slurry in the second sedimentation tank 42 flows to the second overflow port, the primary sedimentation processed slurry is prevented from directly flowing to the second overflow port through the first overflow port 48 and flowing into the third sedimentation tank 43, thereby affecting the sedimentation processing effect on the slurry.
In addition, the moving path of the slurry subjected to the primary sedimentation treatment is increased, so that the sedimentation treatment effect of the tank on the slurry is enhanced.
Moreover, the first overflow port 48 and the pulp inlet 44 are arranged in a staggered manner; the arrangement has the advantages that when the mud in the first settling tank 41 flows to the first overflow port 48, the mud is prevented from being directly discharged from the first settling tank 41 to the second settling tank 42 through the first overflow port 48, and the effect of sedimentation treatment on the mud is prevented from being influenced; meanwhile, the moving path of the sewage in the first settling tank 41 is increased, so that the settling treatment effect of the first settling tank 41 on the mud is enhanced.
Moreover, the second overflow port and the slurry outlet 45 are arranged in a staggered manner; the advantage of this arrangement is that it avoids the mud from being directly transported from the second settling tank 42 to the return pipe 90 through the mud outlet 45, which affects the mud settling treatment effect; at the same time, it helps to increase the moving path of the slurry in the third settling tank 43, thereby enhancing the effect of the slurry settling treatment of the third settling tank 43.
The slurry inlet 44, the first overflow port 48, the second overflow port and the slurry outlet 45 are arranged in a staggered mode in sequence, so that the moving path of slurry in the box body is greatly enhanced, and the slurry sedimentation treatment effect of the box body is enhanced.
The first settling tank 41 has a first volume for holding an amount of sewage, the second settling tank 42 has a second volume for holding an amount of sewage, and the third settling tank 43 has a third volume for holding an amount of sewage, the first volume being larger than the second volume and the third volume, respectively; the untreated mud with a large amount of sludge requires a larger precipitation volume, thereby ensuring that sufficient volume is available for precipitating the sludge; meanwhile, the mud amount of the mud subjected to primary sedimentation and the mud subjected to secondary sedimentation is relatively small, so that the second volume and the third volume are relatively the same as the first volume, and the waste of the volumes is effectively avoided.
The bottom of the box body is provided with a plurality of slag discharging ports which are arranged in a one-to-one correspondence manner with the first settling tank 41, the second settling tank 42 and the third settling tank 43; the pipes are externally connected through the respective third settling tanks 43, thereby facilitating the discharge of sludge at the bottoms of the first settling tank 41, the second settling tank 42, and the third settling tank 43.
A first lifting plate 80, a first spring 82 and a first slag outlet which are horizontally arranged are arranged in the first settling tank 41, the first lifting plate 80 and the first partition plate 46 are vertically arranged, the first settling tank 41 is provided with a first tank wall, the first tank wall and the first partition plate 46 are arranged in a surrounding manner to form a first lower end opening, and the first lifting plate 80 blocks the first lower end opening; the one end of first spring 82 is fixed arrangement, and the other end of first spring 82 is fixed arrangement with first lifter plate 80, and when first lifter plate 80 removed and was in first slag notch below, sediment back mud sediment was discharged through first slag notch.
Thus, the mud is prevented from entering the first settling tank 41 and being discharged from the first slag outlet without being precipitated, so that the waste of high-quality mud is avoided; under the effect of first lifter plate 80, make mud deposit when the gravity of mud sediment is greater than the elasticity of spring, the mud sediment just can discharge through first slag notch, improves mud sediment effect.
First cell wall is equipped with a plurality of first spouts 83, first lifter plate 80 has a plurality of first sliders 81, first slider 81 imbeds first spout 83, realize direction and location that first lifter plate 80 removed, it is more steady to make first lifter plate 80 pressurized movement, the other end and the first slider 81 of first spring 82 are the fixed action, each first slider 81 is the one-to-one with each first spring 82 and arranges, realize first lifter plate 80 pressurized extrusion first spring 82, realize that first lifter plate 80 reciprocates vertically.
The first lifting plate 80 has four first sliding blocks 81, and the four first sliding blocks 81 are arranged along four corners of the first lifting plate 80, so that the movement stability of the first lifting plate 80 is improved.
The first guide plate 84 has a longitudinal height, and the longitudinal height of the first guide plate 84 is gradually increased along the center of the first lifting plate 80 outwards, so that deposited sludge is conveniently concentrated in the center of the first lifting plate 80, and the first lifting plate 80 is prevented from being inclined when moving.
A second lifting plate, a second spring and a second slag hole which are horizontally arranged are arranged in the second settling tank 42, the second lifting plate and the second partition plate 47 are vertically arranged, the second settling tank 42 is provided with a second tank wall, the second tank wall and the second partition plate 47 are arranged in a surrounding manner to form a second lower end opening, and the second lifting plate blocks the second lower end opening; the one end of second spring is fixed arrangement, and the other end and the second lifter plate of second spring are fixed arrangement, and when the second lifter plate removed and was in second slag notch below, the sediment back mud sediment was discharged through the second slag notch.
In this way, the mud is prevented from entering the second settling tank 42 and being discharged from the second slag outlet without being precipitated, so that the waste of the high-quality mud is avoided; under the effect of second lifter plate, make mud deposit when the gravity of mud sediment is greater than the elasticity of spring, the mud sediment just can discharge through the second slag notch, improves mud sediment effect.
The second cell wall is equipped with a plurality of second spouts, the second lifter plate has a plurality of second sliders, second slider embedding second spout, realize direction and location that the second lifter plate removed, it is more steady to make the second lifter plate pressurized remove, the other end and the second slider of second spring are the fixed action, each second slider is the one-to-one with each second spring and arranges, realize that the second lifter plate pressurized extrudees the second spring, realize that the second lifter plate reciprocates along vertically.
The second lifter plate is provided with four second sliders, and the four second sliders are arranged along four corners of the second lifter plate, so that the movement stability of the second lifter plate is improved.
The second lifter plate has up-ward up end, and the second lifter plate is equipped with a plurality of second baffles, and it is outside along second lifter plate center, and the second baffle is the arc and arranges, and a plurality of second baffles encircle to be arranged, and like this, under the effect of a plurality of second baffles, the mud sediment of being convenient for deposit is concentrated in the center of second lifter plate, causes the slope when avoiding the second lifter plate to remove.
The second baffle has vertical height, and is outside along second lifter plate center, and the vertical height of second baffle is crescent, and the mud sediment of being convenient for deposit is concentrated in the center of second lifter plate, causes the slope when avoiding the second lifter plate to remove.
A third lifting plate, a third spring and a third slag hole which are horizontally arranged are arranged in the third settling tank 43, the third lifting plate and the third partition plate are vertically arranged, the third settling tank 43 is provided with a third tank wall, the third tank wall and the third partition plate are arranged in a surrounding manner to form a third lower end opening, and the third lifting plate blocks the third lower end opening; the one end of third spring is fixed arrangement, and the other end and the third lifter plate of third spring are fixed arrangement, and when the third lifter plate removed and was in third slag notch below, the sediment back mud sediment was discharged through the third slag notch.
Thus, the mud is prevented from entering the third settling tank 43 and being discharged from the third slag outlet without being precipitated, so that the waste of high-quality mud is avoided; under the effect of third lifter plate, make mud deposit when the gravity of mud sediment is greater than the elasticity of spring, the mud sediment just can discharge through the third slag notch, improves mud sediment effect.
The third cell wall is equipped with a plurality of third spouts, the third lifter plate has a plurality of third sliders, third slider embedding third spout, realize direction and location that the third lifter plate removed, it is more steady to make the third lifter plate pressurized remove, the other end and the third slider of third spring are the fixed action, each third slider is the one-to-one with each third spring and arranges, realize that the third lifter plate pressurized extrudees the third spring, realize that the third lifter plate reciprocates along vertically.
The third lifter plate is provided with four third sliders, and the four third sliders are arranged along four corners of the third lifter plate, so that the movement stability of the third lifter plate is improved.
The third lifter plate has up-ward up end, and the third lifter plate is equipped with a plurality of third baffle, and it is outside along third lifter plate center, and the third baffle is the arc and arranges, and a plurality of third baffles encircle to be arranged, and like this, under the effect of a plurality of third baffles, the mud sediment of being convenient for deposit is concentrated in the center of third lifter plate, causes the slope when avoiding the third lifter plate to remove.
The third baffle has vertical height, and outwards along third lifter plate center, the vertical height of third baffle is crescent, and the mud sediment of being convenient for deposit is concentrated in the center of third lifter plate, causes the slope when avoiding the third lifter plate to remove.
A slag storage tank is arranged below the slag discharge port 32 of the cyclone 30, so that discharged sludge is prevented from overflowing and flowing outwards, and the sludge is convenient to collect.
The slag storage tank is provided with a top opening, and the slag discharge port 32 of the cyclone 30 and the top opening of the slag storage tank are arranged in a vertically opposite mode, so that sludge can be conveniently discharged into the slag storage tank.
The box body is provided with a first baffle plate 70 and a second baffle plate, the first baffle plate 70 and the second baffle plate are respectively arranged in a horizontal extending manner, the first baffle plate 70 is positioned right below the first overflow port 48, and the second baffle plate is positioned right below the second overflow port; under the effect of first baffle 70 and second baffle, avoid mud for abundant deposit promptly through first overflow mouth 48 or second overflow mouth, improve the sediment effect of box.
In addition, the first baffle 70 and the second baffle help to reduce the sloshing and flow rate of the slurry flowing, thereby improving the settling effect of the tank.
The first baffle plate 70 is formed with a plurality of first flow guide holes 71, the first flow guide holes 71 are arranged in a vertical direction, the first baffle plate 70 has a first bottom end surface facing downwards and a first top end surface facing upwards, the bottom of the first flow guide holes 71 penetrates through the bottom end surface of the first baffle plate 70, the top of the first flow guide holes 71 penetrates through the top end surface of the first baffle plate 70, a first flow guide groove 72 is formed on the top end surface of the first baffle plate 70, and two ends of the first flow guide groove 72 are respectively communicated with the first flow guide holes 71 and the first overflow port 48.
Therefore, the slurry flows to the first overflow port 48 through the first flow guide hole 71 to form a flow channel, and the slurry is prevented from colliding with each other due to disordered flowing directions and affecting the sedimentation effect.
The second baffle is formed with a plurality of second water conservancy diversion holes, and the second water conservancy diversion hole is big-end-up and small-end-up and is arranged, and the second baffle has second bottom face down and second top face up, and the bottom in second water conservancy diversion hole link up the bottom face of second baffle, and the top in second water conservancy diversion hole link up the top face of second baffle, and the top face of second baffle is formed with the second guiding gutter, and second guiding gutter both ends communicate second water conservancy diversion hole and second overflow mouth respectively.
Like this, mud flows to the second overflow mouth through the second water conservancy diversion hole, forms the runner, avoids mud flow direction mixed and disorderly, causes mud clashing each other, influences the precipitation effect.
The construction operation is as follows:
firstly, preparation of construction
1. And (4) setting up an overwater construction operation platform, and organizing the approach, installation and debugging of the drilling machine according to a construction scheme.
2. According to the construction requirements, various devices and machines are prepared, including a secondary hole cleaning down-the-hole electric pump, a swirler 30, a mud box, a connecting rubber pipe and the like.
Secondly, forming holes, finishing holes, cleaning holes at one time and putting down a reinforcement cage
1. And (4) forming holes of the cast-in-place pile according to the design requirement, adopting a slurry retaining wall to achieve the final hole after the design of the bearing layer, and cleaning the holes at one time.
2. And after hole cleaning is finished, the manufactured reinforcement cage is hung in the hole and is fixed at the hole opening.
Thirdly, installing the underwater irrigation conduit 50
1. The guide pipe is required to have good sealing performance, the phenomena of air leakage and water leakage are avoided, a guide pipe sealing water pressure test is carried out before the guide pipe is used to test the sealing performance of the guide pipe, the water pressure test is generally 0.6-1.0 MPa, and the qualified guide pipe can be used after the test.
2. The pouring guide pipe 50 is selected according to the diameter of the pile hole 10, and the pouring guide pipe 50 with the outer diameter phi of 280mm is generally selected for pouring piles of large-diameter foundation engineering of bridges, wharfs and offshore facilities constructed on the water platform so as to ensure the hole cleaning effect and enhance the diffusion capacity of concrete during pouring.
3. The wall thickness of the perfusion catheter 50 is more than or equal to 3mm, the segmental catheter is required to be straight, the deviation of the connecting part is less than or equal to 2mm, and the inner tube is smooth;
4. when the pipe is placed downwards, the distance between the lower end of the pipe and the bottom of the hole is about 30-50 cm, the section of the lowest end of the pipe is 4-6 m, the middle part of the pipe is 2.5m, and the upper part of the pipe is 0.3-1.0 m in short circuit for adjusting and overlapping the length of the pipe.
Fourthly, installing the submersible electric pump 20 and erecting the slurry swirler 30
1. The bottom joint of the submersible electric pump 20 is connected with the top end of the perfusion conduit 50, and a flexible rubber gasket is additionally arranged at the joint so as to keep good sealing performance of the joint.
2. The submersible electric pump 20 is firmly connected with the top opening of the conduit and is fixed at the opening of the conduit, and the stability is always kept.
3. The slurry cyclone 30 is firmly erected, and the positions of a slag valve, a connector and the like are checked to be in good condition before installation, so that the cyclone 30 is ensured to work normally.
4. The slurry outlet 45 of the submersible electric pump 20 is connected with the slurry inlet 44 of the swirler 30 through a rubber hose, the overflow port of the swirler 30 is connected with a rubber hose of the slurry tank, and the return port of the slurry tank is connected into a hole through the rubber hose to form a complete secondary hole cleaning slurry circulation pipeline system.
5. And after the secondary hole cleaning circulating system is installed, carrying out system inspection, such as: checking the firmness degree of the connection position of each pipe orifice, and firmly binding with an iron wire to prevent falling off; the tightness of the whole rubber tube is checked, and the leakage of slurry during hole cleaning is prevented.
6. The mounting connection of each machine tool equipment is rapid to reduce the accumulation of sediment at the bottom of the hole.
7. A slag storage tank is arranged below the slag discharge port 32 of the cyclone 30 to prevent discharged sludge from overflowing and flowing outwards, so that the sludge can be conveniently collected.
Fifthly, secondary hole cleaning is started
1. All the equipment such as the submersible electric pump 20, the swirler 30 and the like are powered on by professional electricians, safety check of the electric equipment is carried out after the secondary hole cleaning system is installed, and the electric equipment can be started after the check meets the requirements.
2. Starting the submersible electric pump 20 and the slurry cyclone 30, and starting secondary hole cleaning; in the process of cleaning the hole, the height of the liquid level of the slurry at the hole opening is closely monitored, and the amount of the slurry pumped and discharged by the submersible electric pump 20 is kept basically consistent with the amount of the slurry reflowing from the slurry tank, so that the water head height of the slurry in the hole is ensured, and the stability of the hole wall is kept.
3. In the secondary hole cleaning process, a specially assigned person is noticed to observe the operation of the swirler 30, and a slag discharging valve of the swirler 30 is kept to discharge slag smoothly; meanwhile, the performance of the circulating slurry is maintained at regular intervals, the slurry index is monitored in time, the specific gravity and the viscosity of the slurry are adjusted in time, the good slag carrying capacity of the slurry is ensured, and the hole cleaning effect is maintained.
4. In the later stage of secondary hole cleaning, under the condition that sediments at the bottom of the hole are basically removed, the circulating part of the mud box can be removed, and the overflow port of the swirler 30 is directly communicated to the pile hole 10 through the rubber tube, so that the secondary hole cleaning efficiency is further improved.
Six, secondary hole cleaning acceptance and cast-in-place pile body concrete pile forming
1. In the hole cleaning process, a specially-assigned person is sent to check the sediment thickness and the slurry index at the bottom of the hole; before the commercial concrete arrives at the site, the thickness of the sediment at the bottom of the hole is not more than 5cm, the relative density of the slurry within 500mm of the bottom of the hole is less than 1.25, the sand content is not more than 4%, and the viscosity is not more than 25 s.
2. And (4) the secondary hole cleaning meets the requirements, immediately removing the electric submersible pump 20 at the hole opening after the supervision and acceptance agree, installing a prepared pouring hopper, and putting the water-proof ball bladder and the cover plate.
3. And (3) pouring by adopting commercial concrete, keeping the buried depth of the guide pipe to be not less than 1m during primary pouring, keeping the buried depth of the guide pipe to be 4-6 m all the time during pouring, and detecting the pouring height of the concrete surface by using a measuring hammer until the elevation position of the pile top exceeds the pouring height by about 1 m.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The secondary hole cleaning method for the cast-in-place pile is characterized by comprising a pile hole, a submersible electric pump, a swirler and a settling tank, wherein the pile hole is cleaned once; the method comprises the following specific steps:
(1) the submersible electric pump is installed, a filling conduit is arranged in the pile hole, the bottom of the submersible electric pump is connected with the upper part of the filling conduit, and the lower part of the filling conduit extends and is embedded into slurry in the pile hole;
(2) erecting the cyclone; the cyclone is respectively connected with a first conveying pipe and a second conveying pipe, two ends of the first conveying pipe are respectively communicated with the cyclone and the submersible electric pump, and the second conveying pipe is respectively communicated with the cyclone and the settling tank;
the submersible electric pump comprises a slag discharging sleeve, the slag discharging sleeve is provided with a discharging port and a discharging port, and the slag discharging sleeve is arranged in a conical shape with a small front part and a large rear part along the direction from the discharging port to the discharging port; the pouring guide pipe is communicated with the discharge port, the discharge port is communicated with the first conveying pipe, the slag discharging sleeve is provided with an electrified heating ring, and the heating ring is arranged at the front end of the slag discharging sleeve;
(3) the cyclone is provided with a slag discharge port and an overflow port, the slurry comprises small-particle slurry and large-particle slurry, the cyclone separates the small-particle slurry and the large-particle slurry, the large-particle slurry is discharged from the slag discharge port, and the small-particle slurry overflows from the overflow port and flows to a settling tank through the second conveying pipe; the cyclone comprises a cylinder body and a cone, the cylinder body and the cone are integrally formed, the cylinder body is communicated with the cone, the upper part of the cone is connected with the cylinder body, the cone is arranged in a shape of a cone with a large upper part and a small lower part from top to bottom, the upper part of the cylinder body forms the overflow outlet, and the lower part of the cone forms the slag discharge port; the barrel is arranged in a cylindrical shape and is provided with a first central axis, and the overflow outlet is arranged opposite to the first central axis of the barrel; the cone is provided with a second central axis, and the slag discharging port is arranged opposite to the second central axis of the cylinder body; the first central axis is aligned with the second central axis; the mud enters the swirler from the submersible electric pump along the tangential direction through the mud inlet pipe, the mud flows from the cylinder part of the swirler to the cone part, the flow section is smaller and smaller, and under the contraction and compression of the outer layer mud, the inner layer mud containing a large number of fine particles has to change the direction and moves upwards to form an inner rotational flow which is discharged from the overflow port; the coarse particles continue to spirally move downwards along the wall of the vessel to form an outer rotational flow which is discharged from a slag discharge port;
(4) the settling tank is connected with a return pipe, the return pipe is communicated with the pile hole, the small-particle slurry is settled and filtered through the settling tank to form high-quality slurry, and the high-quality slurry flows back to the pile hole through the return pipe; the sedimentation tank comprises a tank body, the tank body comprises a first sedimentation tank, a second sedimentation tank and a third sedimentation tank, the tank body is provided with a first partition plate and a second partition plate, and the first partition plate and the second partition plate partition the tank body to form the first sedimentation tank, the second sedimentation tank and the third sedimentation tank which are not communicated with each other; a first lifting plate, a first spring and a first slag outlet which are horizontally arranged are arranged in the first settling tank, the first lifting plate and the first partition plate are vertically arranged, the first settling tank is provided with a first tank wall, the first tank wall and the first partition plate are arranged in a surrounding manner to form a first lower end opening, and the first lifting plate blocks the first lower end opening; one end of the first spring is fixedly arranged, the other end of the first spring is fixedly arranged with the first lifting plate, and when the first lifting plate moves below the first slag outlet, precipitated sludge is discharged through the first slag outlet; the first lifting plate is provided with a plurality of first guide plates, the first guide plates are arranged outwards along the center of the first lifting plate in an arc shape, and the first guide plates are arranged in a surrounding manner;
(5) and starting the submersible electric pump and the swirler to realize secondary hole cleaning of the pile hole.
2. A secondary hole cleaning method for a cast-in-place pile as recited in claim 1, wherein the cyclone comprises a slurry inlet pipe, one end of the slurry inlet pipe is communicated with the first conveying pipe, and the other end of the slurry inlet pipe is communicated with the barrel; the other end of the pulp inlet pipe forms a communicating section which is obliquely embedded and communicated with the cylinder along the tangential direction of the cylinder; the barrel comprises a barrel wall, the communicating section comprises a communicating wall, and the barrel wall is attached to the communicating wall.
3. A secondary hole cleaning method for a cast-in-place pile according to claim 2, characterized in that the cone comprises a cone wall, and the cone wall is arranged in butt joint with the cylinder wall; the inner part of the swirler is provided with convex strips, and the convex strips are spirally arranged along the circumference of the swirler from top to bottom; the convex strip is fixed on the cylinder wall and extends to the conical wall in a surrounding spiral mode.
4. A secondary hole cleaning method for a cast-in-place pile as claimed in any one of claims 1-3, wherein the box body is provided with a slurry inlet, a first overflow port, a second overflow port and a slurry outlet, the slurry inlet is communicated with the second delivery pipe, and the slurry outlet is communicated with the return pipe; the second conveying pipe is communicated with the first settling tank through the slurry inlet, the slurry subjected to precipitation treatment in the first settling tank enters the second settling tank through the first overflow port, the slurry subjected to precipitation treatment in the second settling tank enters the third settling tank through the second overflow port, and the slurry subjected to precipitation treatment in the third settling tank enters the return pipe through the slurry outlet.
5. A secondary hole cleaning method for a cast-in-place pile as recited in claim 4, wherein an upper portion of said first partition plate forms said first overflow port, and an upper portion of said second partition plate forms said second overflow port; and the first overflow ports and the second overflow ports are arranged in a staggered manner along the arrangement direction of the first partition plates and the second partition plates.
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| CN110820745B (en) * | 2019-11-15 | 2024-07-12 | 甘肃中建市政工程勘察设计研究院有限公司 | Suction and separation device and suction and separation method for cohesive virtual soil pile hole muck |
| CN110820746B (en) * | 2019-11-15 | 2024-07-12 | 甘肃中建市政工程勘察设计研究院有限公司 | Intelligent pile hole residue soil sucking machine and pile hole residue soil automatic sucking method |
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| CN113153188A (en) * | 2021-04-25 | 2021-07-23 | 中国葛洲坝集团市政工程有限公司 | Device for performing secondary hole cleaning on cast-in-place pile by adopting enlarged pipe orifice and hole cleaning method |
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| CN113585993A (en) * | 2021-07-22 | 2021-11-02 | 深圳市工勘岩土集团有限公司 | Drilling and hole-cleaning pile-forming method for super-thick covering layer large-diameter rock-socketed cast-in-place pile |
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