CN112144529B - Cleaning method for sediment at bottom of drilled pile - Google Patents
Cleaning method for sediment at bottom of drilled pile Download PDFInfo
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- CN112144529B CN112144529B CN202011008370.1A CN202011008370A CN112144529B CN 112144529 B CN112144529 B CN 112144529B CN 202011008370 A CN202011008370 A CN 202011008370A CN 112144529 B CN112144529 B CN 112144529B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/08—Removing obstacles
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Abstract
The invention discloses a method for cleaning sediment at the bottom of a drilled pile, which comprises the following steps of a, working before cleaning; b. cleaning for the first time; c. putting down a reinforcement cage and a guide pipe; d. and (4) secondary cleaning, namely cleaning the sediment at the bottom of the drilled pile in four steps. The method has the advantages of simple and convenient steps, easy implementation, capability of improving the cleaning effect of the sediment at the bottom of the drilled pile, improving the cleaning efficiency and shortening the construction period, and can be used for cleaning the bottom of the hole by utilizing the sediment cleaning device in the sequential cleaning process, removing the sediment which is difficult to remove in the positive circulation of the slurry, along with good cleaning effect, convenient cleaning and easy operation.
Description
Technical Field
The invention belongs to the technical field of drilling, and particularly relates to a method for cleaning sediments at the bottom of a drilled pile.
Background
The cast-in-situ bored pile is a pile formed by forming a pile hole in foundation soil through mechanical drilling, steel pipe soil extrusion or manual excavation and the like on an engineering site, placing a reinforcement cage in the pile hole and pouring concrete into the pile hole. The cast-in-situ bored pile has the advantages of wide application range, high single-pile bearing capacity, low construction noise, small vibration, low unit price and the like, and is widely applied to various building projects, along with the increasing of high-rise buildings, the requirement on the bearing capacity of the pile foundation is higher and higher. The rotary drilling rig has high automation level and strong adaptability, but is influenced by mechanical properties, personnel operation level, field technical management capability and the like of different drilling rigs, particularly by field stratum conditions, and related rotary drilling pile construction technical specifications are not compiled in the industry, a systematic engineering method research is not formed, a large number of quality problems of rotary drilling piles are generated along with the quality problems in the construction process, and the excessive thickness of pile bottom sediment is one of the more common quality problems. The serious influence on the quality of the pile foundation caused by excessive or excessively thick sediment at the bottom of the pile is mainly reflected as follows: the excessive thickness of sediment seriously restricts the exertion of the bearing capacity of the pile end and increases the settlement displacement of the pile, the exertion of the bearing capacity of the pile is seriously influenced, and huge adverse potential hazards can be caused to the safety of the integral structure of the upper-layer building of the pile foundation.
The existing pile bottom sediment cleaning method has poor cleaning effect and low cleaning efficiency, so that the construction period is long, the pile bottom sediment is not thoroughly cleaned, and the bearing capacity of the pile is influenced.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a method for cleaning the sediment at the bottom of the drilled pile, which can improve the cleaning effect of the sediment at the bottom of the drilled pile, improve the cleaning efficiency and shorten the construction period.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for cleaning the sediment at the bottom of a drilled pile is characterized by comprising the following steps:
a. working before cleaning:
embedding pile casings, arranging the pile casings according to pile positions, filling the pile casings between the pile casings and a hole wall with clay, then guiding back the pile position center to be corrected through four control pile casings, enabling the pile casing center to coincide with the pile position center, drilling a hole after a drilling machine is in place, gradually accelerating normal drilling after a drilling rod is completely inserted into the hole, observing whether the drilling rod is vertical at any time, controlling the drilling depth through a depth counter, and checking the hole position, the hole diameter, the hole depth and the inclination after the drilling hole reaches a designed elevation to ensure that the drilling hole meets requirements. The orifice is communicated with the pile bottom, so that subsequent drilling and pile bottom sediment cleaning are facilitated, subsequent construction is facilitated, and the construction efficiency is improved.
b. Primary cleaning:
when the pile is drilled to the designed pile bottom elevation, the drilling is stopped in time, the drill bit is lifted, then the slag removing device is fed to be close to the pile bottom, the slag is removed for hole cleaning, the slag removing device is lifted after the slag is removed for hole cleaning, slurry is pumped in, and the positive circulation is maintained for 25 minutes. Adopt the sediment removal device clearance pile bottom sediment, the clearance is effectual, and cleaning efficiency is high, can clear away most pile bottom sediment, and after the sediment removal device clearance was accomplished, adopt the positive circulation of mud to clear up the sediment once more, improve the clearance effect.
c. And (3) putting a reinforcement cage and a guide pipe:
and (4) lowering and fixing the reinforcement cage, avoiding touching and communicating with the hole wall in the process of the reinforcement cage below, and then lowering and fixing the conduit. After the primary slag removal is finished, a reinforcement cage and a guide pipe are arranged, so that the subsequent concrete pouring is facilitated, and the subsequent secondary slag removal is also facilitated.
d. Secondary cleaning:
the catheter was connected to a mud pump, which was then activated to withdraw mud from the catheter and maintained in a reverse cycle for 20 minutes. And the secondary slag removal adopts the reverse circulation of slurry to further remove the sediment at the bottom of the pile and improve the removal rate of the sediment at the bottom of the pile.
Furthermore, a filtering grid is arranged in the mud tank to filter sediments, so that mud circulation is ensured to avoid the sediments from flowing into the hole again. Set up filtering grid in the mud pit, avoid bold sediment to get into the mud circulation once more, reduce the scarfing cinder effect, also can avoid the destruction of bold sediment to the pore wall simultaneously.
Further, the detailed steps of the first cleaning in the step b are as follows:
1) placing a slag removal device: vertically placing a guide frame in the tunnel, placing the guide frame at a position of 20-40cm away from the bottom of a hole in the guide frame, fixing the guide frame on a fixed support on the ground, then sleeving a clamping ring of the slag removing device on the guide frame, keeping the slag removing device horizontal, and placing the slag removing device downwards. The slag removal device is guided by the fixed bracket base, so that the slag removal device can be prevented from colliding with the hole wall in the lowering and lifting processes, the damage of the hole wall is avoided, the engineering quality is prevented from being influenced, the fixed bracket can facilitate the fixation of the slag removal device, the support can be provided when the slag removal device removes slag, the slag removal effect at the hole bottom of the slag removal device is improved,
2) removing slag at the bottom of the hole: and starting the slag removal device to remove slag at the bottom of the hole.
3) And (3) recovering a slag removal device: after the slag removing device finishes removing slag, the slag is lifted and recovered.
Further, the detailed steps of the pore bottom slag removal in the step b) 2) are as follows: after the slag removal device is placed to the hole bottom, a push rod motor in the slag removal device is started, the push rod motor pushes a clamping block in a clamping ring, the clamping ring is fixed on a guide frame, then the cleaning motor is started to drive a cleaning disc to rotate, and under the action of a crushing wheel and a shovel block of the cleaning disc, sediment at the hole bottom is pushed into a collecting box at the center of the cleaning disc to be collected. Utilize push rod motor chucking fixed, can be convenient for the clearance dish rotate the clearance at the bottom of the hole, guaranteed cleaning process in cleaning device's stability, improve the clearance effect.
Further, in the cleaning process, by utilizing the cleaning advantages of the two rings of the cleaning disc, after the outer ring crushing wheel is crushed, the shoveling blocks push the crushed sediments into the inner ring under the rotating action, and then the inner ring is crushed and then pushed into the collecting box under the action of the shoveling blocks of the inner ring for collection. Adopt two rings clearance structures, can improve the broken collection effect of sediment, the outer loop carries out once broken and concentrates, the inner ring carries out the secondary crushing and collects, collect the sediment through collecting the box at last, two rings secondary clearance can effectively avoid the sediment to pile up and lead to the unable normal rotation of cleaning disc, the good operation of cleaning disc and the reliability of work have been guaranteed, the clearance effect of sediment is improved, also make the operating personnel outside the hole need not carry out complicated operation and can accomplish the clearance, the convenient easy operation of clearance.
Furthermore, after the sediments are pushed into the collecting box, the sediments are lifted by utilizing a screw rod in the collecting box, and then the sediments are pushed into the collecting cavity by utilizing a rotary baffle plate for collection. The collection box adopts the screw rod to promote, promotes effectually, and repeatable strong operability, the granule that can promote is big, then utilizes the baffle to sweep into and collect the chamber and collect, can avoid collecting the sediment in the chamber and get back to the hole bottom again, has improved collection efficiency and collection effect.
Further, the detailed steps of the slag removal device in step b 3) are as follows: after the cleaning is finished, the push rod motor returns, and then an operator at the top of the pit lifts the slag cleaning device for recovery. The push rod motor returns, the movement of the slag removing device is convenient, then the push rod motor is lifted and recovered, the slag removing is completed, the operation is simple and convenient, and the using effect is good.
Further, the detailed steps of the secondary cleaning in the step d are as follows: and a negative pressure state is caused in the guide pipe by the suction action of the mud pump, mud in an annular area between the guide pipe and the hole wall flows into the hole bottom under the action of atmospheric pressure, is sucked into the guide pipe and then rises to a ground mud tank, the mud in the mud tank is supplemented into the hole, and sediment at the hole bottom is brought into the mud tank by the rising mud to finish secondary cleaning. And the slurry is reversely circulated for secondary cleaning, so that the cleaning effect of the sediment at the bottom of the hole is further improved, and the engineering quality is improved.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the method works before cleaning through a; b. cleaning for the first time; c. putting down a reinforcement cage and a guide pipe; d. the secondary clearance totally four steps accomplish the clearance to the sediment at the bottom of the drilling pile, and the step is simple and convenient, and easy to carry out can promote the clearance effect of sediment at the bottom of the drilling pile, improves cleaning efficiency, shortens construction cycle, and in clearance process in proper order, utilize the scarfing cinder device to clear up the hole end, clear away the sediment that is difficult for clearing away in the mud positive circulation, and the clearance is effectual, and the clearance is convenient, easily the operation.
The cleaning device comprises a fixing mechanism, a cleaning mechanism and a collecting mechanism, wherein the fixing mechanism comprises an electric push rod, a clamping ring and a clamping block, the clamping block is arranged in the clamping ring and is in sliding connection with the clamping ring, the electric push rod drives the clamping block to slide, after the clamping ring is sleeved on a guide frame, the electric push rod pushes the clamping block to clamp the clamping ring so as to fix the cleaning device, a downward pressing electric push rod can be further arranged on the fixing mechanism to press the cleaning mechanism and the collecting mechanism downward, and the cleaning effect of the cleaning mechanism is improved. The cleaning mechanism comprises a cleaning disc and a driving motor, a rack arranged on the cleaning disc is meshed with a gear on an output shaft of the driving motor, the driving motor is used for driving the cleaning disc to rotate, a shovel block and a crushing wheel are arranged on the cleaning disc, the shovel block is provided with an inclined plane, sediment can be pushed into the center of the cleaning disc when the cleaning disc rotates, the sediment at the bottom of the shovel block can be shoveled, the cleaning effect is improved, the crushing wheel can roll and crush the sediment, the shovel block can be conveniently shoveled to push the sediment, the sediment can be refined, and the sediment at the bottom of a hole can be conveniently cleaned; the collecting mechanism adopts a collecting box, a screw rod in the collecting box is lifted, the screw rod is connected with a baffle, and the tail end of the baffle is provided with a collecting cavity which can sweep the lifted sediment into the collecting cavity for collection. The cleaning device can improve the cleaning effect of the hole bottom, is convenient to clean and is easy to operate.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural diagram of a method for cleaning sediments at the bottom of a bored pile according to the present invention;
FIG. 2 is a schematic structural view of a cleaning mechanism on a guide frame according to the present invention;
FIG. 3 is a schematic view of the connection between the driving motor and the cleaning plate according to the present invention;
FIG. 4 is a schematic structural view of a fixing mechanism according to the present invention;
FIG. 5 is a schematic view of the cleaning disc according to the present invention;
FIG. 6 is a schematic view showing the structure of the connection between the screw and the collecting chamber in the present invention;
FIG. 7 is a schematic view of the structure of the screw of the present invention.
In the drawings, 1-a securing mechanism; 2-a cleaning mechanism; 3-a collecting mechanism; 4, an electric push rod; 5-a clamping ring; 6-clamping blocks; 7-cleaning the disc; 8-driving a motor; 9-a rack; 10-a gear; 11-a shovel block; 12-a crushing wheel; 13-a screw; 14-a collection box; 15-a baffle; 16-a collection chamber; 17-drilling; (ii) a 19-a mud pit; 20-a filter grid; 21-a slurry pump; 22-a catheter; 23-a guide frame; 24-pressing the electric push rod.
Detailed Description
As shown in fig. 1 to 7, the method for cleaning the sediment at the bottom of the bored pile of the present invention includes the following steps:
a. working before cleaning:
embedding pile casings, arranging the pile casings according to pile positions, filling the pile casings between the pile casings and hole walls with clay, then guiding the pile position center back to be corrected through four control pile casings, enabling the pile casing center to coincide with the pile position center, drilling a hole after a drilling machine is in place, gradually accelerating normal drilling after a drilling rod is completely inserted into the hole, observing whether the drilling rod is vertical at any time, controlling the depth of a drilling hole 17 through a depth counter, and checking the hole position, the hole diameter, the hole depth and the inclination after the drilling hole 17 reaches a designed elevation to ensure that the drilling hole 17 meets requirements. The orifice is communicated with the pile bottom, so that subsequent drilling 17 and pile bottom sediment cleaning are facilitated, subsequent construction is facilitated, and the construction efficiency is improved.
b. Primary cleaning:
when the pile is drilled to the designed pile bottom elevation, the drilling is stopped in time, the drill bit is lifted, then the slag removing device is fed to be close to the pile bottom, the slag is removed for hole cleaning, the slag removing device is lifted after the slag is removed for hole cleaning, slurry is pumped in, and the positive circulation is maintained for 25 minutes. Adopt the sediment removal device clearance pile bottom sediment, the clearance is effectual, and cleaning efficiency is high, can clear away most pile bottom sediment, and after the sediment removal device clearance was accomplished, adopt the positive circulation of mud to clear up the sediment once more, improve the clearance effect.
c. Lowering the reinforcement cage and the guide tube 22:
the reinforcement cage is lowered and fixed, avoiding touching the intercommunicating and the bore wall in the process of the reinforcement cage below, and then the conduit 22 is lowered and fixed. After the primary slag removal is finished, the reinforcement cage and the guide pipe 22 are arranged, so that the subsequent concrete pouring is facilitated, and the subsequent secondary slag removal is also facilitated.
d. Secondary cleaning:
the conduit 22 is connected to a mud pump 21, after which the mud pump 21 is activated to pump mud out of the conduit 22 for a reverse cycle of 20 minutes. And the secondary slag removal adopts the reverse circulation of slurry to further remove the sediment at the bottom of the pile and improve the removal rate of the sediment at the bottom of the pile.
A filter grid 20 is arranged in the mud pit 19 to filter sediments and ensure mud circulation to avoid the sediments from flowing into the hole again. The filtering grid 20 is arranged in the mud tank 19, so that massive sediments are prevented from entering mud circulation again, the slag removal effect is reduced, and meanwhile, the damage of the massive sediments to the hole wall can be avoided.
The detailed steps of one cleaning in the step b are as follows:
1) placing a slag removal device: vertically placing a guide frame 23 in the tunnel, placing the guide frame 23 down when the guide frame 23 is 20-40cm away from the bottom of the hole, fixing the guide frame 23 on a fixed support on the ground, then sleeving a clamping ring 5 of the slag removing device on the guide frame 23, keeping the slag removing device horizontal, and placing the slag removing device down. The scarfing cinder device utilizes the direction of fixed bolster seat, can guarantee that the scarfing cinder device can not collide with the pore wall transferring with the promotion in-process, avoids the damaged engineering quality that influences of pore wall, and secondly the fixed bolster can make things convenient for the fixed of scarfing cinder device, provides the support when the scarfing cinder of scarfing cinder device, improves the scarfing cinder effect of scarfing cinder device hole bottom.
2) Removing slag at the bottom of the hole: and starting the slag removal device to remove slag at the bottom of the hole.
3) And (3) recovering a slag removal device: after the slag removing device finishes removing slag, the slag is lifted and recovered.
The detailed steps of the mesoporous bottom slag removal in the step b 2) are as follows: after the slag removing device is placed to the bottom of the hole, a push rod motor in the slag removing device is started, the push rod motor pushes a clamping block 6 in a clamping ring 5, the clamping ring 5 is fixed on a guide frame 23, then the cleaning motor is started to drive a cleaning disc 7 to rotate, and sediment at the bottom of the hole is pushed into a collecting box 14 at the center of the cleaning disc 7 to be collected under the action of a crushing wheel 12 and a shovel block 11 of the cleaning disc 7. Utilize push rod motor chucking fixed, can be convenient for clearance dish 7 rotates the clearance at the hole bottom, guaranteed clearance in-process cleaning device's stability, improve the clearance effect.
In the cleaning process, by utilizing the cleaning advantages of the two rings of the cleaning disc 7, after the outer ring crushing wheel 12 is crushed, the shovel blocks 11 push the crushed sediments into the inner ring under the rotation action, and then after the inner ring is crushed, the sediments are pushed into the collecting box 14 under the action of the inner ring shovel blocks 11 for collection. Adopt two rings clearance structure, can improve the broken collection effect of sediment, the outer loop carries out once broken and concentrates, the inner ring carries out the secondary crushing and collects, collect the sediment via collecting box 14 at last, two rings secondary clearance, can effectively avoid the sediment to pile up and lead to the unable normal rotation of cleaning disc 7, the good operation of cleaning disc 7 and the reliability of work have been guaranteed, the clearance effect of sediment is improved, also make the operating personnel outside the hole need not carry out complicated operation and can accomplish the clearance, the convenient easy operation of clearance.
After the sediment is pushed into the collecting box 14, the sediment is lifted by the screw 13 in the collecting box 14, and then pushed into the collecting cavity 16 by the rotating baffle plate 15 for collection. Collect box 14 and adopt screw rod 13 to promote, promote effectually, but repeated strong operability, the granule that can promote is big, then utilizes baffle 15 to sweep into and collect chamber 16 and collect, can avoid collecting the sediment in the chamber 16 and get back to the hole bottom again, has improved collection efficiency and collection effect.
The detailed steps of the slag removal device in the step b 3) are as follows: after the cleaning is finished, the push rod motor returns, and then an operator at the top of the pit lifts the slag cleaning device for recovery. The push rod motor returns, the movement of the slag removing device is convenient, then the push rod motor is lifted and recovered, the slag removing is completed, the operation is simple and convenient, and the using effect is good.
The detailed steps of the secondary cleaning in the step d are as follows: by the suction action of the mud pump 21, a negative pressure state is generated in the guide pipe 22, mud in the annular area between the guide pipe 22 and the hole wall flows into the hole bottom under the action of atmospheric pressure, is sucked into the guide pipe 22 and then rises to the ground mud pit 19, the mud in the mud pit 19 is replenished into the hole, and sediment at the hole bottom is brought into the mud pit 19 by the rising mud to finish secondary cleaning. And the slurry is reversely circulated for secondary cleaning, so that the cleaning effect of the sediment at the bottom of the hole is further improved, and the engineering quality is improved.
The method works before cleaning through a; b. cleaning for the first time; c. lowering the reinforcement cage and the guide tube 22; d. the secondary clearance totally four steps accomplish the clearance to the sediment at the bottom of the drilling pile, and the step is simple and convenient, and easy to carry out can promote the clearance effect of the sediment at the bottom of the 17 piles in drilling, improves cleaning efficiency, shortens construction cycle, in clearance process in proper order, utilizes the scarfing cinder device to clear up the hole bottom, clears away the sediment that is difficult for in the mud positive circulation and clears away, and it is effectual to clear up, and the clearance is convenient, easily operation.
The cleaning device comprises a fixing mechanism 1, a cleaning mechanism 2 and a collecting mechanism 3, wherein the fixing mechanism 1 comprises an electric push rod 4, a clamping ring 5 and a clamping block 6, the clamping block 6 is arranged in the clamping ring 5 and is in sliding connection with the clamping ring 5, the electric push rod 4 drives the clamping block 6 to slide, after the clamping ring is sleeved on a guide frame 23, the electric push rod 4 pushes the clamping block 6 to clamp the clamping ring 5 so as to fix the cleaning device, a downward pressing electric push rod 24 can be further arranged on the fixing mechanism 1 and can be used for pressing the cleaning mechanism 2 and the collecting mechanism 3 downward, and the cleaning effect of the cleaning mechanism 2 is improved. The cleaning mechanism 2 comprises a cleaning disc 7 and a driving motor 8, a rack 9 arranged on the cleaning disc 7 is meshed with a gear 10 on an output shaft of the driving motor 8, the driving motor 8 drives the cleaning disc 7 to rotate, a shovel block 11 and a crushing wheel 12 are arranged on the cleaning disc 7, the shovel block 11 is provided with an inclined plane, sediment can be pushed into the center of the cleaning disc 7 when the cleaning disc 7 rotates, the sediment at the bottom of the shovel block 11 can be shoveled, the cleaning effect is improved, the crushing wheel 12 can roll and crush the sediment, the sediment can be conveniently shoveled and pushed into the sediment by the shovel block 11, the sediment can be refined, and the sediment can be conveniently cleaned at the bottom of a hole; the collecting mechanism 3 adopts a collecting box 14, a screw rod 13 in the box is lifted, the screw rod 13 is connected with a baffle plate 15, and the tail end of the baffle plate is provided with a collecting cavity 16 which can sweep the lifted sediment into the collecting cavity 16 for collection. The cleaning device can improve the cleaning effect of the hole bottom, is convenient to clean and is easy to operate.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (6)
1. A cleaning method of sediment at the bottom of a drilled pile is characterized in that a cleaning device is adopted for cleaning, the cleaning device comprises a fixing mechanism, a cleaning mechanism and a collecting mechanism, the fixing mechanism comprises an electric push rod, a clamping ring and a clamping block, the clamping block is arranged in the clamping ring and is in sliding connection with the clamping ring, the electric push rod drives the clamping block to slide, after the clamping ring is sleeved on a guide frame, the electric push rod pushes the clamping block, clamping of the clamping ring can be realized, the cleaning device is fixed, a pressing electric push rod is further arranged on the fixing mechanism, the cleaning mechanism and the collecting mechanism can be pressed downwards, the cleaning effect of the cleaning mechanism is improved, the cleaning mechanism comprises a cleaning disc and a driving motor, a rack arranged on the cleaning disc is meshed with a gear on an output shaft of the driving motor, the cleaning disc is driven to rotate by the driving motor, the cleaning disc is provided with the shovel block and the crushing wheel, the shovel block is provided with an inclined plane, sediment can be pushed into the center of the cleaning disc when the cleaning disc rotates, meanwhile, the sediment at the bottom of the shovel block can be shoveled, the cleaning effect is improved, the crushing wheel can roll and crush the sediment, the shovel block can conveniently shovel and push the sediment, the sediment can be refined, and the sediment can be conveniently cleaned at the bottom of a hole;
the method comprises the following steps:
a. working before cleaning:
embedding protective cylinders, arranging the protective cylinders according to pile positions, filling the protective cylinders between the protective cylinders and the hole wall with clay, then guiding the center of the pile position back to be corrected through four control protective cylinders, enabling the center of the protective cylinders to coincide with the center of the pile position, drilling a hole after a drilling machine is in place, gradually accelerating normal drilling after all drill rods enter the hole, observing whether the drill rods are vertical at any time, controlling the drilling depth through a depth counter, and checking the hole position, the hole diameter, the hole depth and the inclination after the drilling reaches a designed elevation to ensure that the drilling meets requirements;
b. primary cleaning:
when the pile is drilled to the designed pile bottom elevation, stopping drilling, lifting out the drill bit, feeding a slag removing device to be close to the pile bottom, removing slag and cleaning holes, lifting out the slag removing device after the slag and cleaning holes are finished, pumping slurry, and maintaining the positive circulation for 25 minutes;
the detailed steps of one cleaning in the step b are as follows:
1) placing a slag removal device: vertically placing a guide frame in the tunnel, placing the guide frame downwards when the guide frame is 20-40cm away from the bottom of the hole, fixing the guide frame on a fixed support on the ground, then sleeving a clamping ring of a slag removal device on the guide frame, keeping the slag removal device horizontal, and placing the slag removal device downwards;
2) removing slag at the bottom of the hole: starting the slag removal device, and removing slag at the bottom of the hole;
3) and (3) recovering a slag removal device: after the slag removing device finishes removing the slag, lifting and recovering;
the detailed steps of the mesoporous bottom slag removal in the step b 2) are as follows: after the slag removing device is placed to the bottom of the hole, a push rod motor in the slag removing device is started, the push rod motor pushes a clamping block in a clamping ring, so that the clamping ring is fixed on a guide frame, then the cleaning motor is started to drive a cleaning disc to rotate, and under the action of a crushing wheel and a shovel block of the cleaning disc, the sediment at the bottom of the hole is pushed into a collecting box at the center of the cleaning disc to be collected;
c. and (3) putting a reinforcement cage and a guide pipe:
lowering and fixing the reinforcement cage, avoiding touching and communicating with the hole wall in the process of lowering the reinforcement cage below, then lowering and fixing the conduit,
d. secondary cleaning:
the catheter was connected to a mud pump, which was then activated to withdraw mud from the catheter and maintained in a reverse cycle for 20 minutes.
2. The method for cleaning the drill pile bottom sediment according to claim 1, characterized in that: and a filtering grid is arranged in the mud tank to filter sediments, so that mud circulation is ensured and the sediments are prevented from flowing into the hole again.
3. The method for cleaning the drill pile bottom sediment according to claim 1, characterized in that: in the cleaning process, the two rings of cleaning advantages of the cleaning disc are utilized, after the outer ring crushing wheel is crushed, the shoveling blocks push crushed sediments into the inner ring under the rotating action, and then the crushed inner ring is pushed into the collecting box under the action of the shoveling blocks of the inner ring for collection.
4. The method for cleaning the drill pile bottom sediment according to claim 1, characterized in that: after the sediments are pushed into the collecting box, the sediments are lifted by utilizing a screw rod in the collecting box, and then the sediments are pushed into a collecting cavity by utilizing a rotary baffle plate to be collected.
5. The method for cleaning the drill pile bottom sediment according to claim 1, characterized in that: the detailed steps of the slag removal device in the step b 3) are as follows: after the cleaning is finished, the push rod motor returns, and then an operator at the top of the pit lifts the slag cleaning device for recovery.
6. The method for cleaning the drill pile bottom sediment according to claim 1, characterized in that: the detailed steps of the secondary cleaning in the step d are as follows: and a negative pressure state is caused in the guide pipe by the suction action of the mud pump, mud in an annular area between the guide pipe and the hole wall flows into the hole bottom under the action of atmospheric pressure, is sucked into the guide pipe and then rises to a ground mud tank, the mud in the mud tank is supplemented into the hole, and sediment at the hole bottom is brought into the mud tank by the rising mud to finish secondary cleaning.
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| CN114775612B (en) * | 2022-04-25 | 2024-04-05 | 中交上海港湾工程设计研究院有限公司 | Mud cleaning construction method in jacket steel pipe pile |
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| EP2669464A1 (en) * | 2013-07-31 | 2013-12-04 | Oldenamp B.V. | A clean-out tool for cleaning out a well bore and a method for cleaning out a well bore using such a clean-out tool |
| CN208167738U (en) * | 2018-04-25 | 2018-11-30 | 江苏省交通工程集团有限公司 | A kind of cast-in-situ bored pile bottom hole draws slag device |
| CN111119169A (en) * | 2019-12-23 | 2020-05-08 | 诚通凯胜生态建设有限公司 | Construction method of drilled pile |
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