CN114541995A - Hole cleaning device and method for cast-in-place pile - Google Patents
Hole cleaning device and method for cast-in-place pile Download PDFInfo
- Publication number
- CN114541995A CN114541995A CN202210086462.4A CN202210086462A CN114541995A CN 114541995 A CN114541995 A CN 114541995A CN 202210086462 A CN202210086462 A CN 202210086462A CN 114541995 A CN114541995 A CN 114541995A
- Authority
- CN
- China
- Prior art keywords
- hole
- pipe
- slurry
- cast
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000002002 slurry Substances 0.000 claims abstract description 190
- 238000005086 pumping Methods 0.000 claims abstract description 109
- 238000009434 installation Methods 0.000 claims abstract description 23
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 26
- 238000004062 sedimentation Methods 0.000 claims description 23
- 230000008093 supporting effect Effects 0.000 claims description 23
- 230000002441 reversible effect Effects 0.000 claims description 21
- 239000011440 grout Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 2
- 230000001976 improved effect Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 15
- 239000013049 sediment Substances 0.000 description 14
- 238000007789 sealing Methods 0.000 description 9
- 238000005553 drilling Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a hole cleaning device and a method for a cast-in-place pile, the device structure is a slurry pumping device which is positioned below and used for pumping slurry, the upper end of the slurry pumping device is connected with a connecting pipe for the slurry to pass through by a connecting piece section by section, the connecting pipe is connected with an outlet bent pipe for the slurry to be sprayed out by the connecting piece, the lower side wall of the slurry pumping device is provided with an air diversion pipe for spraying high-pressure air, the nozzle of the air diversion pipe is upward, the air diversion pipe is connected into an air compression device for providing high-pressure air by an air supply pipe, the air supply pipe is positioned outside the slurry pumping device and the connecting pipe by the arrangement of the air diversion pipe, the air supply pipe can use a longer soft pipe, the length of the air supply pipe entering a cast-in-place pile hole can be conveniently controlled, the connection with the air diversion pipe only needs to be carried out once, the installation and disassembly efficiency of a circulating device is greatly improved, the sprayed high-pressure air can push the slurry to move towards the slurry pumping direction, the high-pressure air also becomes one of power for slurry pumping, and the slurry pumping efficiency is increased.
Description
Technical Field
The invention relates to the field of building construction, in particular to a hole cleaning device and method for a cast-in-place pile.
Background
The cast-in-place pile is a construction body for urban building, and is made up by directly making holes on the designed pile position, making the cross-section of said pile be circular, after the holes are formed, placing reinforcing cage in the holes and pouring concrete. The cast-in-place pile has the advantages of no vibration, no soil squeezing, low noise, suitability for being used in dense urban building areas and the like during construction, so the cast-in-place pile is widely applied to construction, particularly has the characteristics of high efficiency, less pollution, multiple functions, guaranteed construction quality and the like of the cast-in-place pile with the rotary drilling hole, meets the requirement of comprehensive development, and is widely applied to the construction of the cast-in-place pile with the drilling hole. The rotary drilling and grouting pile is characterized in that a drill bit is adopted to drill pile holes with equal sections, and hole expansion is carried out after the drilled holes reach a preset depth in order to enable a poured pile body to have a better supporting effect. And finally, placing the reinforcement cage into the pile hole for pouring concrete. Before concrete is poured, the pile hole must be cleaned to remove the dregs and drilling slag in the pile hole.
The purpose of hole cleaning is to pump and replace the slurry in the original drilled hole, reduce the indexes of the slurry such as relative density, viscosity, sand content and the like, clean the drilling slag, reduce the sediment thickness at the bottom of the hole and prevent the condition that the bearing capacity of the foundation column is influenced by uneven settlement or overlarge integral settlement of the foundation column caused by the fact that the sediment soil left at the bottom of the pile is too thick in the subsequent pouring construction process. Particularly, with the development of construction technology, the adoption of large-diameter drilled piles tends to be common, and the thorough removal of the hole bottom precipitated soil in the construction process is particularly important for fully exerting the bearing capacity of the original soil layer of the pile bottom and improving the vertical bearing capacity of the large-diameter drilled pile. The hole cleaning also creates good conditions for pouring underwater concrete, so that the depth measurement is correct, the pouring is smooth, the concrete quality is ensured, and major engineering quality accidents such as pile breakage are avoided.
The existing hole cleaning technology for the cast-in-place pile mainly comprises gas lift reverse circulation hole cleaning and gas lift forward circulation hole cleaning, wherein reverse circulation refers to a mode of circulating mud in a pile hole and a guide pipe, and the reverse circulation corresponds to the forward circulation of the mud. As shown in fig. 7, the manner of supplying the slurry from the orifice and discharging the slurry from the conduit belongs to reverse circulation, and vice versa, the manner of positive circulation, as shown in fig. 8, the gas lift refers to the manner of using the buoyancy of the high-pressure gas in the slurry to make the slurry move upward along with the bubbles, so as to form negative pressure, and then driving the slurry below to move upward through the negative pressure, so as to discharge the slurry. Generally, the gas lift positive circulation is suitable for the situation of shallow hole depth, because the scum capacity of slurry in the hole is gradually reduced along with the increase of the hole depth, and after the depth of a pile hole exceeds 60m, the hole cleaning and drilling slag of the gas lift positive circulation is difficult to float upwards through the slurry or takes longer, the slurry is easy to form a layered situation in the hole, the specific gravity of the upper layer is small, the specific gravity of the lower layer is large, and a large amount of drilling slag is precipitated. The gas lift reverse circulation has high slurry discharge speed in the guide pipe and strong slag carrying capacity, can adapt to various hole depths, and has increasingly high use frequency of gas lift reverse circulation along with the continuous deepening of a cast-in-place pile hole along with the height of a building along with the urbanization process in China.
The gas lift reverse circulation working process is as shown in fig. 9, the high pressure gas is sprayed out of the gas inlet pipe and then mixed with the slurry, and a plurality of (low-density) bubbles are formed in the conduit in a dispersed mode, the bubbles are subjected to upward buoyancy of the slurry and drive the slurry (viscous force) to move upwards, in addition, the pressure is reduced in the rising process, and the volume is increased. Therefore, negative pressure is formed below the gas-liquid mixing section, the slurry at the lower part of the gas-liquid mixing section is continuously supplemented, and the sediment at the bottom of the hole enters the guide pipe under the driving of the motion of the slurry and is discharged out of the hole along with the slurry to form a continuous and stable motion process.
However, the gas lift reverse circulation slurry pumping system has the following disadvantages due to the structure thereof: (1) because the air inlet pipe is arranged in the conduit, in order to offset the force of slurry flowing in the conduit during slurry pumping, the air inlet pipe is made of hard material, the air inlet pipe and the conduit are installed and placed after being hermetically connected one by one, so that the installation and disassembly time of a gas lift reverse circulation pipeline is long, the construction progress is greatly delayed, the hole cleaning cost is high, and new sediments are generated due to leakage in the pile pouring hole during the disassembly process due to the overlong disassembly time of the circulation pipeline, so that the construction quality is influenced; (2) because the high-pressure gas is sprayed downwards, the slurry at the inlet of the air pipe is pushed downwards firstly and then is discharged upwards along the guide pipe under the viscous force of the gas, and the high-pressure gas moves upwards under the action of the slurry buoyancy after overcoming the sprayed force, so that the slurry pumping efficiency is reduced; (3) because the intake pipe is located the pipe, the intake pipe can constantly rub with the mud that flows at a high speed during thick liquid is taken out, can lead to the intake pipe life-span to reduce to the flow of mud also can be influenced to intake pipe itself.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a hole cleaning device and a hole cleaning method for a cast-in-place pile, wherein a circulating pipeline can be assembled and disassembled quickly, the grout pumping efficiency is high, and the service life of an air pipe is long.
In order to solve the technical problem, the invention provides a hole cleaning device for a cast-in-place pile, which comprises a slurry pumping device positioned below and used for pumping slurry, wherein the upper end of the slurry pumping device is connected with one section and more than one section of connecting pipes through which the slurry passes section by section through connecting pieces, the last section of connecting pipe is connected with an outlet bent pipe for spraying the slurry through the connecting pieces, an air diversion pipe for spraying high-pressure air is arranged on the lower side wall of the slurry pumping device, the nozzle of the air diversion pipe is upward, so that the slurry is driven by the high-pressure air while being subjected to gas negative pressure lifting force, the slurry pumping speed is increased, and the air diversion pipe is connected into an air compression device for supplying the high-pressure air through an air supply pipe.
The air compression device can be a high-pressure air compressor, an air pump, an air compression pump and the like, and the high-pressure air compressor is preferred.
Meanwhile, the bending part of the outlet elbow is preferably in arc transition, so that the resistance of the slurry flowing process can be reduced; the outlet portion of the outlet elbow may be arranged to be smaller than the connecting portion so that mud can be sprayed a distance to prevent mud from falling back into the bore of the bored pile.
Preferably, the outlet of the outlet elbow is connected with the slurry feeding pipe, the other end of the slurry feeding pipe is connected into the sedimentation tank, the sedimentation tank is connected into the cast-in-place pile hole through the return pipe, the extracted slurry enters the sedimentation tank along the slurry feeding pipe, and water after the slurry is precipitated in the sedimentation tank circularly enters the cast-in-place pile hole through the return pipe, so that the water is recycled.
In order to further improve the installation and disassembly efficiency of the circulating pipeline, the invention also comprises a bulge I which is convenient for clamping and positioning in the circumferential direction of the slurry pumping device, a bulge II which is convenient for clamping and positioning in the circumferential direction of the connecting pipe, and a thread and a fastening hole for circumferential screwing are arranged on the connecting piece. As supporting, strutting arrangement has still been designed, strutting arrangement comprises backup pad and two open close plates that articulate in the backup pad, and the mid portion of backup pad is opened has the hole I that can supply the circulation pipeline to pass through, and it is big than taking out thick liquid device and connecting pipe external diameter to open on two open close plates, than protruding I and protruding II holes II that the external diameter is little for two open close plates are closed back, and hole II can be through the main part of taking out thick liquid device and connecting pipe, and can block protruding I and protruding II. When two open-close plates 62 are opened, thick liquid device, connecting pipe and connecting piece can be followed hole I and reciprocated to the preset position, then two closed open-close plates make thick liquid device or connecting pipe can utilize protruding I or protruding II to place on strutting arrangement to install connecting pipe or export return bend conveniently or dismantle. The opening plate is also provided with a hole III for the air supply pipe to pass through, so that the air supply pipe can extend out of the hole of the cast-in-place pile along the outer wall of the connecting pipe, when the air supply pipe is a flexible pipe fitting, the length of the air supply pipe in the hole of the cast-in-place pile is controlled, and the phenomenon that the air supply pipe enters too long to influence the cleaning of the hole of the cast-in-place pile is avoided.
The invention also provides a hole cleaning method for the cast-in-place pile by using the hole cleaning device, which comprises the following specific steps and principles:
s1: placing the supporting device on the cast-in-place pile hole, enabling the hole I of the supporting plate to be located on the cast-in-place pile hole, and opening the two split plates;
s2: the air diversion pipe is connected with an air compression device by an air supply pipe, and the air compression device can adopt a high-pressure air compressor;
s3: the grout pumping device connected with the air supply pipe is placed into the hole of the cast-in-place pile through hoisting, one end close to the air diversion pipe faces downwards when the grout pumping device is placed into the hole, the direction of an air outlet of the air diversion pipe faces upwards, when the grout pumping device is placed downwards to reach the position of the bulge I, the two split plates are closed, the grout pumping device is placed downwards again until the bulge I is supported by the two split plates, and after the grout pumping device is supported by the two split plates, the position of the grout pumping device is temporarily fixed, so that the grout pumping device can be connected conveniently;
in the step, the high-pressure air is upwards sprayed out by the air diversion pipe, so that the power for the initial upward movement of the slurry at the pipe opening of the air diversion pipe is given, the slurry discharge speed is further accelerated, and the hole cleaning efficiency is improved;
s4: the other end of the slurry pumping device is hermetically connected through a connecting piece connecting pipe;
s5: the two split plates are opened, the connected device is lowered to the protrusion II close to the supporting device by hoisting, the two split plates are closed, the protrusion II is lowered to be supported by the two split plates, and after the connecting pipe is supported by the two split plates, the position of the connecting pipe is temporarily fixed, so that the connecting pipe can be connected with the next connecting pipe in a sealing manner through the connecting piece conveniently;
s6: repeating S5 until the distance between the bottom of the slurry pumping device and the bottom of the bored concrete pile hole is 10-50cm, and supporting the connecting pipe at the top by the two split plates; the interval of the bottom of the hole of the cast-in-place pile is used for peripheral slurry to flow into the slurry pumping device, if the distance is too small, the space for the slurry to flow into is insufficient, so that the slurry pumping efficiency is low, and if the distance is too large, the sediment cleaning effect of the hole bottom of the cast-in-place pile is not ideal;
s7: the outlet elbow is hermetically connected to the connecting pipe at the uppermost end by using a connecting piece;
in steps S4-S7, since the connector is provided with the screw thread and the fastening hole for circumferential tightening, the fastening hole can be used to make the connector rotate quickly by using the tightening tool, so that the screw thread can be used to realize sealing connection quickly, and the circulation pipe can be installed quickly, and accordingly, the disassembly speed is faster than the assembly speed because the problems of sealing and fastening degree are not considered; if the bored concrete pile hole is shallow, the bottom of the slurry pumping device can be separated from the bottom of the bored concrete pile hole by 10-50cm without using a connecting pipe, and the slurry pumping device can be directly connected with the outlet elbow pipe by using a connecting piece.
S8: the outlet direction of the outlet elbow is connected with a slurry feeding pipe, the other end of the slurry feeding pipe is connected into a sedimentation tank, and the sedimentation tank is connected into a bored concrete pile hole through a return pipe; completing the installation of the hole cleaning device of the cast-in-place pile;
s9: starting the high-pressure air compressor to enable high-pressure air to enter the air diversion pipe along the air supply pipe and to be sprayed out upwards under the action of the air diversion pipe;
the high-pressure air is sprayed out of the air diversion pipe and then mixed with the slurry, and a plurality of (low-density) bubbles are formed in the slurry pumping device in a dispersing mode, are subjected to upward buoyancy of the slurry and drive the slurry (viscous force) to move upwards, and the pressure is reduced in the rising process, so that a gas-liquid mixing section is formed below the slurry pumping device, negative pressure is generated, the slurry on the lower portion of the slurry pumping device is continuously supplemented, sediment at the bottom of a hole of a cast-in-place pile enters the slurry pumping device under the driving of the motion of the slurry, and is sprayed out of the cast-in-place pile hole along a connecting pipe and an outlet bent pipe along with the slurry, the slurry preferably flows into a sedimentation tank through a slurry conveying pipe, water precipitated in the sedimentation tank is conveyed back to the cast-in-place pile hole through a return pipe, and the liquid level of the slurry in the cast-in-place pile hole is always higher than that of the air diversion pipe, and a continuous and stable process is formed;
s10: and after hole cleaning is finished, the backflow pipe stops supplying water into the bored concrete pile hole, the high-pressure air compressor is turned off to stop high-pressure air supply when the liquid level in the hole is low to the point that the grout pumping device cannot be pumped out, and the hole cleaning device of the bored concrete pile is detached in the reverse installation order to complete cleaning of the bored concrete pile hole.
Compared with the prior art, the invention has the beneficial effects that:
(1) through the setting of air diversion pipe for the air feed pipe is located outside thick liquid device and the connecting tube of taking out, and the air feed pipe can use longer soft tubular product, and its length that gets into the bored concrete pile hole of control that can be convenient also only need carry on once with being connected of air diversion pipe can. The problem of traditional gas lift reverse circulation blast pipe be located slurry pumping device and connecting tube, must use hard material pipe fitting, and the installation needs a lesson sealing connection, influences circulation pipeline installation and dismantlement efficiency is avoided, avoids circulation pipeline takedown time overlength to lead to dismantling in-process bored concrete pile hole to produce the sediment because of the seepage and influence construction quality repeatedly.
(2) Through the arrangement of the air diversion pipe, the sprayed high-pressure air can push the slurry to move towards the slurry pumping direction, so that the high-pressure air also becomes one of power for slurry pumping, and the slurry pumping efficiency is improved.
(3) The contact between the slurry moving at high speed and the air feed pipe is avoided, the service life of the air feed pipe is prolonged, and the problems that the outer wall of the air feed pipe is in contact with the slurry flowing at high speed to cause rapid abrasion and the slurry flowing is blocked when the traditional gas lift reverse circulation slurry pumping is carried out are solved.
(4) Through the cooperation of the convex position and the supporting device in the slurry pumping device and the connecting pipe, the circulation pipeline of the hole cleaning device of the cast-in-place pile can be stably and efficiently connected, and the fastening hole and the thread are conveniently screwed in the circumferential direction by the connecting piece, so that the connection and installation efficiency of the circulation pipeline of the slurry pumping device are further accelerated. Especially when the bored concrete pile hole is darker, can greatly shorten the time of clear hole device installation and the dismantlement of bored concrete pile, can effectively avoid circulation pipeline takedown time overlength to lead to the downthehole seepage of bored concrete pile water too much, the problem that the mud influences bored concrete pile hole quality is reformed formation again, is favorable to the clear hole construction of ultrafast in bored concrete pile hole, practices thrift manpower and materials.
(5) Through the setting of sedimentation tank and back flow for the downthehole mud of bored concrete pile is taken out the back, can prevent the pollution of mud direct discharge to the environment through sedimentation separation sediment and water, can recycle the water of separating in the mud simultaneously, resources are saved, reduce cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of the slurry pumping installation of the hole cleaning device in the embodiment 1 and the embodiment 2 of the invention;
FIG. 2 is a schematic structural diagram of a hole cleaning device according to embodiment 1 and embodiment 2 of the present invention;
FIG. 3 is a schematic view of the supporting device of the present invention;
FIG. 4 is a schematic view of a connector structure according to the present invention;
FIG. 5 is a schematic structural view of a hole cleaning device in accordance with embodiment 3 of the present invention;
FIG. 6 is a schematic view showing the flow direction of the installation fluid during slurry pumping of the hole cleaning device in the embodiment 3 and the embodiment 4 of the invention;
FIG. 7 is a schematic diagram of the positive circulation of slurry in the background of the invention;
FIG. 8 is a schematic diagram of slurry reverse circulation in the background of the invention;
FIG. 9 is a schematic diagram of a gas lift reverse cycle operation in the background of the invention.
The labels in the figures are: 1-slurry pumping device, 2-connecting pipe, 3-outlet elbow, 4-air supply pipe, 5-connecting piece, 6-supporting device, 9-cast pile hole, 11-air diversion pipe, 12-bulge I, 22-bulge II, 51-fastening hole, 52-thread, 61-supporting plate, 611-hole I, 62-opening plate, 621-hole II, 622-hole III, 7-air compression device, 8-settling tank, 81-slurry supply pipe and 82-return pipe.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood and obvious, the technical solutions in the embodiments of the present invention are clearly and completely described below to further illustrate the invention, and obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments.
Example 1
As shown in fig. 1-2, the present embodiment provides a hole cleaning device for a bored concrete pile, which includes a slurry pumping device 1 located at the lowest part for pumping slurry, the slurry pumping device 1 is connected with a connecting pipe 2 for pumping slurry to pass through by a connecting member 5, the number of the connecting pipes 2 depends on the drilling depth of a bored concrete pile hole 9, an outlet elbow 3 for spraying slurry is connected above the connecting pipe 2 by the connecting member 5, the arc of the bent part of the outlet elbow 3 is excessive, so as to reduce the resistance of slurry, the outlet part of the outlet elbow is smaller than the connecting part, so that slurry can be sprayed for a certain distance, and the slurry is prevented from falling into the bored concrete pile hole 9 again.
The lower side wall of the slurry pumping device 1 is provided with an air diversion pipe 11 for high-pressure air to spray, a nozzle of the air diversion pipe 11 is upward, so that slurry receives the driving force of high-pressure air when receiving the lifting force of gas negative pressure, the slurry pumping speed is increased, and the air diversion pipe 11 is connected to a high-pressure air compressor for providing high-pressure gas through an air supply pipe 4.
Example 2
The embodiment provides a hole cleaning method for a cast-in-place pile, which takes a hole cleaning device of the cast-in-place pile in embodiment 1 as a tool, and comprises the following specific steps:
s1: firstly, the air diversion pipe 11 is connected with the air compression device 7 by the air supply pipe 4, and the air compression device 7 can adopt a high-pressure air compressor;
s2: the slurry pumping device 1 connected with the air supply pipe 4 is placed into the cast-in-place pile hole 9 through hoisting, when the slurry pumping device is placed into the cast-in-place pile hole, one end close to the air diversion pipe 11 faces downwards, and the direction of an air outlet of the air diversion pipe 11 faces upwards; the high-pressure air is sprayed upwards by the air diversion pipe 11, so that the slurry at the pipe orifice of the air diversion pipe 11 is given an initial upward movement power, the slurry discharge speed is further accelerated, and the hole cleaning efficiency is increased;
s3: the other end of the slurry pumping device 1 is hermetically connected with the connecting pipe 2 through a connecting piece 5;
s4: the connected device is lowered down for a certain distance by hoisting, and then is hermetically connected with the next connecting pipe 2 through a connecting piece 5 above the connecting pipe 2;
s5: repeating S4 until the distance between the bottom of the slurry pumping device 1 and the bottom of the bored concrete pile hole is 10-50cm, and fixing the connected partial devices;
s6: the outlet elbow 3 is hermetically connected to the connecting pipe 2 at the uppermost end by using a connecting piece 5, so that the installation of the hole cleaning device of the cast-in-place pile is completed;
s7: starting a high-pressure air compressor, enabling high-pressure air to enter an air diversion pipe 11 along an air supply pipe 4 and to be sprayed upwards under the action of the air diversion pipe 11, enabling the high-pressure air sprayed out of the air diversion pipe 11 to be mixed with slurry and dispersed in a slurry pumping device 1 to form a plurality of bubbles (with small density), enabling the bubbles to be subjected to upward buoyancy of the slurry and driving the slurry (viscous force) to move upwards, reducing the pressure and increasing the volume in the rising process, so that a gas-liquid mixing section can be formed below the slurry pumping device 1 to generate negative pressure, enabling the slurry at the lower part of the slurry pumping device 1 to be continuously supplemented, enabling sediment at the bottom of a hole 9 of a cast-in-place pile hole 9 to enter the slurry pumping device 1 under the driving of the motion of the slurry, and discharging the sediment out of the cast-in-place pile hole 9 along a connecting pipe 2 and an outlet elbow pipe 3 along with the slurry to form a continuous and stable process;
s8: water is introduced into the cast-in-place pile hole 9, so that the mud liquid surface in the cast-in-place pile hole 9 is higher than the air diversion pipe 11, and the continuous operation of hole cleaning is ensured;
s9: and after hole cleaning is finished, stopping water flowing into the cast-in-place pile hole 9, stopping the high-pressure air compressor to stop high-pressure air supply when the liquid level in the hole is low and the grout pumping device cannot be pumped out, and removing the hole cleaning device of the cast-in-place pile in the reverse installation order to finish cleaning the cast-in-place pile hole 9.
In steps S3 to S6, if the bored concrete pile hole 9 is shallow and the bottom of the slurry pumping device 1 is spaced from the bottom of the bored concrete pile hole by 10 to 50cm without using the connecting pipe 2, the slurry pumping device 1 may be connected to the outlet elbow 3 by using the connecting member 5.
In this embodiment, the clear hole device of bored concrete pile among embodiment 1 has been utilized as the instrument for at the thick liquid in-process of taking out, the air feed pipe is located and takes out thick liquid device and connecting tube outside, can use longer soft tubular product, its length that gets into bored concrete pile hole of convenient control, with the connection of air diversion pipe also only need carry on once can. The problem of traditional gas lift reverse circulation blast pipe be located slurry pumping device and connecting tube, must use hard material pipe fitting, and the installation needs a lesson sealing connection, influences circulation pipeline installation and dismantlement efficiency is avoided, avoids circulation pipeline takedown time overlength to lead to dismantling in-process bored concrete pile hole to produce the sediment because of the seepage and influence construction quality repeatedly.
Meanwhile, through the arrangement of the air diversion pipe, the sprayed high-pressure air can push the slurry to move towards the slurry pumping direction, so that the high-pressure air also becomes one of power for slurry pumping, and the slurry pumping efficiency is increased.
The contact between the slurry moving at high speed and the air feed pipe is avoided, the service life of the air feed pipe is prolonged, and the problems that the outer wall of the air feed pipe is in contact with the slurry flowing at high speed to cause rapid abrasion and the slurry flowing is blocked when the traditional gas lift reverse circulation slurry pumping is carried out are solved.
Example 3
As shown in fig. 3-6, the present embodiment provides a hole cleaning device for a bored concrete pile, including a slurry pumping device 1 located at the lowest for pumping slurry, a connecting pipe 2 for slurry to pass through is connected to the slurry pumping device 1 through a connecting piece 5, the number of the connecting pipes 2 depends on the depth of a bored concrete pile hole 9, an outlet elbow 3 for slurry to be sprayed out is connected to the upper side of the connecting pipe 2 through the connecting piece 5, the arc of the bent portion of the outlet elbow 3 is excessive, so as to reduce the resistance of slurry, the outlet portion of the outlet elbow 3 is smaller than the connecting portion, and the outlet is connected with a slurry delivery pipe 81, so that the pumped slurry enters a sedimentation tank 8 along the slurry delivery pipe 81, and water precipitated by the sedimentation tank 8 circulates into the bored concrete pile hole 9 through a return pipe 82, thereby realizing the recycling of water.
The lower side wall of the slurry pumping device 1 is provided with an air diversion pipe 11 for spraying high-pressure air, a nozzle of the air diversion pipe 11 is upward, so that slurry receives the driving force of the high-pressure air while receiving the gas negative pressure lifting force, the slurry pumping speed is increased, and the air diversion pipe 11 is connected to an air compression device 7 for providing the high-pressure air through an air supply pipe 4.
Meanwhile, a bulge I12 facilitating clamping positioning is arranged on the circumferential direction of the slurry pumping device 1, a bulge II 22 facilitating clamping positioning is arranged on the circumferential direction of the connecting pipe 2, and a thread 52 and a fastening hole 51 for circumferential tightening are arranged on the connecting piece 5.
The hole cleaning device of the cast-in-place pile further comprises a supporting device 6, the supporting device 6 is composed of a supporting plate 61 and two opening plates 62 hinged to the supporting plate 61, a hole I611 for the slurry pumping device 1, the connecting pipe 2, the air supply pipe 4 and the connecting piece 5 to pass through is formed in the middle of the supporting plate 61, a hole II 621 is formed in each opening plate 62, and after the two opening plates 62 are closed, the hole II 621 can pass through the slurry pumping device 1 and the main body of the connecting pipe 2 and can clamp the protrusion I12 and the protrusion II 22. When two open-close plates 62 are opened, slurry pumping device 1, connecting pipe 2 and connecting piece 5 can move up and down to preset positions along hole I611, then two open-close plates 62 are closed, so that slurry pumping device 1 or connecting pipe 2 can be placed on supporting device 6 by utilizing protrusion I12 or protrusion II 22, and connecting pipe 2 or outlet elbow 3 can be conveniently installed or detached. Opening plate 62 is still opened and is had hole III 622 that supplies air feed pipe 4 to pass through, makes air feed pipe 4 can stretch out outside bored concrete pile hole 9 along connecting pipe 2 outer wall, when air feed pipe 4 is flexible pipe fitting, helps controlling the length of air feed pipe 4 in bored concrete pile hole 9, avoids air feed pipe 4 to get into overlength and influences the clearance of bored concrete pile hole 9.
Example 4
The embodiment provides a hole cleaning method for a cast-in-place pile, which uses the hole cleaning device for the cast-in-place pile in embodiment 3 as a tool, and the flow direction of fluid in the method is shown in fig. 6, and the specific steps are as follows:
s1: placing the supporting device 6 on the cast-in-place pile hole 9, enabling the hole I611 of the supporting plate 61 to be located on the cast-in-place pile hole 9, and opening the two split plates 62;
s2: the air diversion pipe 11 is connected with the air compression device 7 by the air supply pipe 4, and the air compression device 7 can adopt a high-pressure air compressor;
s3: the grout pumping device 1 connected with the air supply pipe 4 is placed into the bored concrete pile hole 9 through hoisting, when the grout pumping device is placed, one end close to the air diversion pipe 11 faces downwards, so that the direction of an air outlet of the air diversion pipe 11 faces upwards, when the grout pumping device 1 is placed downwards to reach the position of the bulge I12, the two split plates 62 are closed, the grout pumping device 1 is placed downwards again until the bulge I12 is supported by the two split plates 62, and after the grout pumping device 1 is supported by the two split plates 62, the position of the grout pumping device is temporarily fixed, so that the grout pumping device can be connected conveniently;
in the step, because the air diversion pipe 11 enables the high-pressure air to be sprayed upwards, the power for the initial upward movement of the slurry at the pipe orifice of the air diversion pipe 11 is provided, the slurry discharge speed is further accelerated, and the hole cleaning efficiency is increased;
s4: the other end of the slurry pumping device 1 is hermetically connected with the connecting pipe 2 through the connecting piece 5, and as the connecting piece 5 is provided with the thread 52 and the fastening hole 51 for circumferential screwing, the fastening hole 51 can be used for enabling the connecting piece 5 to rapidly rotate by adopting a screwing tool, so that the thread 52 is used for rapidly realizing the sealing connection;
s5: the two split plates 62 are opened, when the connected device is lowered to the protrusion II 22 close to the supporting device 6 by hoisting, the two split plates 62 are closed, and then the device is lowered to the protrusion II 22 supported by the two split plates 62, and after the connecting pipe 2 is supported by the two split plates 62, the position of the connecting pipe is temporarily fixed, so that the connecting pipe can be connected with the next connecting pipe 2 in a sealing manner through the connecting piece 5; due to the fact that the threads 52 and the fastening holes 51 used for circumferential tightening are arranged in the connecting piece 5, the fastening holes 51 can be used for enabling the connecting piece 5 to rotate quickly by adopting a tightening tool, and therefore sealing connection is achieved quickly through the threads 52;
s6: repeating S5 until the distance between the bottom of the slurry pumping device 1 and the bottom of the bored concrete pile hole is 10-50cm, and then the connecting pipe 2 at the top is supported by the two split plates 62;
s7: the outlet elbow 3 is hermetically connected to the connecting pipe 2 at the uppermost end by a connecting piece 5;
s8: the outlet direction of the outlet elbow 3 is connected with a slurry feeding pipe 81, the other end of the slurry feeding pipe 81 is connected into a sedimentation tank 8, and the sedimentation tank 8 is connected into a cast-in-place pile hole 9 through a return pipe 82; completing the installation of the hole cleaning device of the cast-in-place pile;
s9: starting a high-pressure air compressor to enable high-pressure air to enter the air diversion pipe 11 along the air supply pipe 4 and to be sprayed upwards under the action of the air diversion pipe 11, the high-pressure air is sprayed out of the air diversion pipe 11 and then mixed with the slurry to be dispersed into the slurry pumping device 1 to form a plurality of bubbles (with small density), the bubbles are subjected to upward buoyancy of the slurry and drive the slurry (viscous force) to move upwards, the pressure is reduced and the volume is increased in the rising process, so that a gas-liquid mixing section is formed below the slurry pumping device 1 to generate negative pressure, the slurry at the lower part of the slurry pumping device 1 is continuously replenished, sediment at the bottom of the hole 9 of the cast pile hole enters the slurry pumping device 1 under the driving of the motion of the slurry, flows into the sedimentation tank 8 along with the slurry along the connecting pipe 2, the outlet elbow pipe 3 and the slurry supply pipe 81, water precipitated by the sedimentation tank 8 is returned into the cast pile hole 9 through the return pipe 82, and the liquid level of the slurry in the cast pile hole 9 is always higher than that of the air diversion pipe 11, forming a continuous stable process;
s10: after the hole cleaning is finished, the return pipe 82 stops supplying water to the cast-in-place pile hole 9, when the liquid level in the hole is low enough that the slurry pumping device cannot be pumped out, the high-pressure air compressor is turned off to stop supplying high-pressure air, and the hole cleaning device of the cast-in-place pile is detached in the reverse order of installation to finish cleaning the cast-in-place pile hole 9.
In steps S4 to S7, if the bored concrete pile hole 9 is shallow and the bottom of the slurry pumping device 1 is spaced from the bottom of the bored concrete pile hole by 10 to 50cm without using the connecting pipe 2, the slurry pumping device 1 may be connected to the outlet elbow 3 by using the connecting member 5.
In this embodiment, the clear hole device that has utilized bored concrete pile in embodiment 3 is the instrument, through the setting of air diversion pipe for the air feed pipe is located and takes out thick liquid device and connecting tube outside, and the air feed pipe can use longer soft tubular product, and its length that gets into bored concrete pile hole of control that can be convenient, and the connection with air diversion pipe also only need carry on once can. The problem of traditional gas lift reverse circulation blast pipe be located slurry pumping device and connecting tube, must use hard material pipe fitting, and the installation needs a lesson sealing connection, influences circulation pipeline installation and dismantlement efficiency is avoided, avoids circulation pipeline takedown time overlength to lead to dismantling in-process bored concrete pile hole to produce the sediment because of the seepage and influence construction quality repeatedly.
Through the arrangement of the air diversion pipe, the sprayed high-pressure air can push the slurry to move towards the slurry pumping direction, so that the high-pressure air also becomes one of power for slurry pumping, and the slurry pumping efficiency is improved.
The contact between the slurry moving at high speed and the air feed pipe is avoided, the service life of the air feed pipe is prolonged, and the problems that the outer wall of the air feed pipe is in contact with the slurry flowing at high speed to cause rapid abrasion and the slurry flowing is blocked when the traditional gas lift reverse circulation slurry pumping is carried out are solved.
Through the cooperation of the convex position and the supporting device in the slurry pumping device and the connecting pipe, the circulation pipeline of the hole cleaning device of the cast-in-place pile can be stably and efficiently connected, and the fastening hole and the thread are conveniently screwed in the circumferential direction by the connecting piece, so that the connection and installation efficiency of the circulation pipeline of the slurry pumping device are further accelerated. Especially when the bored concrete pile hole is darker, can greatly shorten the time of clear hole device installation and the dismantlement of bored concrete pile, can effectively avoid circulation pipeline takedown time overlength to lead to the downthehole seepage of bored concrete pile water too much, the problem that the mud influences bored concrete pile hole quality is reformed formation again, is favorable to the clear hole construction of ultrafast in bored concrete pile hole, practices thrift manpower and materials.
Through the setting of sedimentation tank and back flow for the downthehole mud of bored concrete pile is taken out the back, can prevent the pollution of mud direct discharge to the environment through sedimentation separation sediment and water, can recycle the water of separating in the mud simultaneously, resources are saved, reduce cost.
Having thus described the principal technical features and basic principles of the invention, and the advantages associated therewith, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description is described in terms of various embodiments, not every embodiment includes only a single embodiment, and such descriptions are provided for clarity only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.
Claims (10)
1. The utility model provides a clear hole device of bored concrete pile, is used for extracting the thick liquid device (1) of taking out of mud including being located the below, takes out thick liquid device (1) upper end and is connected with connecting pipe (2) that one section and more than one section confession mud passed through one section through connecting piece (5) festival by festival, and last section connecting pipe (2) are connected through connecting piece (5) and are supplied mud spun export return bend (3), its characterized in that: an air diversion pipe (11) for spraying high-pressure air is arranged on the lower side wall of the slurry pumping device (1), the nozzle of the air diversion pipe (11) is upward, and the air diversion pipe (11) is connected into an air compression device (7) for providing high-pressure air through an air supply pipe (4).
2. A hole cleaning device for a cast-in-place pile according to claim 1, wherein: the arc of the bending part of the outlet elbow (3) is excessive, so that the resistance of the slurry is reduced, and the outlet part of the outlet elbow (3) is smaller than the connecting part, so that the slurry can be sprayed for a certain distance.
3. A hole cleaning device for a cast-in-place pile according to claim 1, wherein: the outlet of the outlet elbow (3) is connected with a slurry feeding pipe (81), the other end of the slurry feeding pipe (81) is connected into the sedimentation tank (8), and the sedimentation tank (8) is connected into the cast-in-place pile hole (9) through a return pipe (82).
4. A hole cleaning device for a cast-in-place pile according to any one of claims 1-3, characterized in that: still including strutting arrangement (6), strutting arrangement (6) are become by backup pad (61) and articulate two open close plates (62) on backup pad (61), it has hole I (611) to open on backup pad (61), it has hole II (621) to open on two open close plates (62), it is provided with protruding I (12) to take out thick liquid device (1) circumference, connecting pipe (2) circumference is provided with protruding II (22), hole II (621) are than taking out thick liquid device (1) and connecting pipe (2) external diameter big, it is little than protruding I (12) and protruding II (22) external diameter.
5. A hole cleaning device for a cast-in-place pile according to claim 4, wherein: the opening plate (62) is also provided with a hole III (622) through which the air supply pipe (4) can pass.
6. A hole cleaning device for a cast-in-place pile according to claim 1, wherein: the connecting piece (5) is provided with a thread (52) and a fastening hole (51) for circumferential screwing.
7. A method for cleaning holes in a cast-in-place pile using a hole cleaning apparatus according to any one of claims 1 to 6, comprising the steps of:
s1: the air diversion pipe (11) is connected with the air compression device (7) by the air supply pipe (4);
s2: the slurry pumping device (1) connected with the air supply pipe (4) is placed into the cast-in-place pile hole (9) through hoisting, so that the air outlet direction of the air diversion pipe (11) is upward;
s3: the other end of the slurry pumping device (1) is connected with the connecting pipe (2) through a connecting piece (5);
s4: the connected device is lowered down for a certain distance by hoisting, and then is connected with the next section of connecting pipe (2) above the connecting pipe (2) through a connecting piece (5);
s5: repeating S4 until the interval between the bottom of the slurry pumping device (1) and the bottom of the bored concrete pile hole is 10-50cm, and then fixing the connected partial devices;
s6: the outlet elbow (3) is connected to the connecting pipe (2) positioned at the uppermost end by using a connecting piece (5), and the installation of the hole cleaning device of the cast-in-place pile is completed;
s7: starting the air compression device (7), so that high-pressure air enters the air diversion pipe (11) along the air feeding pipe (4) and is sprayed upwards under the action of the air diversion pipe (11);
s8: water is introduced into the cast-in-place pile hole (9), so that the mud liquid surface in the cast-in-place pile hole (9) is higher than the air diversion pipe (11), and the continuous operation of hole cleaning is ensured;
s9: and after hole cleaning is finished, stopping water flowing into the cast-in-place pile hole (9), closing the air compression device (7) to stop high-pressure air supply when the liquid level in the cast-in-place pile hole (9) is too low to be extracted, and removing the hole cleaning device of the cast-in-place pile in the reverse installation order to finish cleaning the cast-in-place pile hole (9).
8. A method for cleaning a hole of a cast-in-place pile according to claim 7, wherein: before the slurry pumping device (1) is placed in the cast-in-place pile hole (9), the supporting device (6) is placed on the cast-in-place pile hole (9) firstly, so that the hole I (611) of the supporting plate (61) is positioned on the cast-in-place pile hole (9).
9. A method for cleaning a hole of a cast-in-place pile according to claim 8, wherein: the connecting process of the connecting pipe (2) is as follows: firstly, opening the two split plates (62), closing the two split plates (62) when the grout pumping device (1) is placed in the cast-in-place pile hole (9) and the bulge I (12) is close to the position of the supporting device (6) until the bulge I (12) is supported by the two split plates (62), and then connecting the grout pumping device (1) with the connecting pipe (2) by using the connecting piece (5);
then opening the two open-close plates (62), lowering the connected device to the protrusion II (22) by hoisting when approaching the supporting device (6), closing the two open-close plates (62) until the protrusion II (22) is supported by the two open-close plates (62), then connecting with the next section of connecting pipe (2) through the connecting piece (5), after the interval between the bottom of the grout pumping device (1) and the bottom of the bored concrete pile hole is 10-50cm, supporting the connecting pipe (2) positioned at the top by the two open-close plates (62), and finally connecting the outlet elbow (3) to the connecting pipe (2) positioned at the top by the connecting piece (5);
the connecting piece (5) is provided with the threads (52) and the fastening holes (51) for circumferential screwing, and the fastening holes (51) can be used for enabling the connecting piece (5) to rotate quickly by adopting a screwing tool, so that connection can be realized quickly by the threads (52).
10. A method for cleaning a hole of a cast-in-place pile according to claim 9, wherein: the outlet elbow (3) is connected into the sedimentation tank (8) through a slurry feeding pipe (81), the sedimentation tank (8) is connected into the cast-in-place pile hole (9) through a return pipe (82), and pumped slurry flows into the sedimentation tank (8) and is returned into the cast-in-place pile hole (9) through the return pipe (82) after being settled, so that a continuous and stable process is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210086462.4A CN114541995A (en) | 2022-01-25 | 2022-01-25 | Hole cleaning device and method for cast-in-place pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210086462.4A CN114541995A (en) | 2022-01-25 | 2022-01-25 | Hole cleaning device and method for cast-in-place pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114541995A true CN114541995A (en) | 2022-05-27 |
Family
ID=81671570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210086462.4A Pending CN114541995A (en) | 2022-01-25 | 2022-01-25 | Hole cleaning device and method for cast-in-place pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114541995A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2311519Y (en) * | 1997-08-22 | 1999-03-24 | 刘仁瑞 | Strengthening setting position adjustment underground pile structure |
| CN105937377A (en) * | 2016-06-08 | 2016-09-14 | 深圳市宏业基基础工程有限公司 | Air lift reverse circulation borehole cleaning method |
| CN109853571A (en) * | 2019-01-04 | 2019-06-07 | 宁莎莎 | Local air lift reversing port bottom slag cleaning device and method before a kind of cast-in-situ bored pile concrete pouring |
| CN213038372U (en) * | 2020-07-06 | 2021-04-23 | 深圳市工勘岩土集团有限公司 | Gas lift reverse circulation secondary hole cleaning circulation mud pressure relief device for large-diameter ultra-deep cast-in-place pile |
| CN113404454A (en) * | 2021-07-05 | 2021-09-17 | 中铁五局集团第一工程有限责任公司 | Cast-in-situ bored pile hole cleaning device and method |
-
2022
- 2022-01-25 CN CN202210086462.4A patent/CN114541995A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2311519Y (en) * | 1997-08-22 | 1999-03-24 | 刘仁瑞 | Strengthening setting position adjustment underground pile structure |
| CN105937377A (en) * | 2016-06-08 | 2016-09-14 | 深圳市宏业基基础工程有限公司 | Air lift reverse circulation borehole cleaning method |
| CN109853571A (en) * | 2019-01-04 | 2019-06-07 | 宁莎莎 | Local air lift reversing port bottom slag cleaning device and method before a kind of cast-in-situ bored pile concrete pouring |
| CN213038372U (en) * | 2020-07-06 | 2021-04-23 | 深圳市工勘岩土集团有限公司 | Gas lift reverse circulation secondary hole cleaning circulation mud pressure relief device for large-diameter ultra-deep cast-in-place pile |
| CN113404454A (en) * | 2021-07-05 | 2021-09-17 | 中铁五局集团第一工程有限责任公司 | Cast-in-situ bored pile hole cleaning device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101748913A (en) | Automatic sewage disposal method of pool and sewage disposal system thereof | |
| CN102493435A (en) | Boring and trenching gas lift reverse circulation residue discharging method | |
| CN112917660B (en) | Efficient anti-blocking backflow grouting pipe and method | |
| CN108189234B (en) | Grouting filling rapid pulping device and method | |
| CN212428665U (en) | Bridge hole pile sand-rich sediment pump drainage device | |
| CN114150873A (en) | Grouting device and grouting method for sleeve grouting | |
| CN105649559A (en) | Device and method for removing hole bottom sediment of pore-forming pouring pile | |
| CN114541995A (en) | Hole cleaning device and method for cast-in-place pile | |
| CN205876245U (en) | A clear hole system for holing build stake | |
| CN112065310A (en) | Bridge hole pile sand-rich sediment pumping device and using method | |
| CN209837006U (en) | Rotary-spraying grouting rotary-digging construction system | |
| CN1085981A (en) | Capsule sealing grouting and sealing device thereof | |
| CN111706275B (en) | Construction method of slurry circulation system of bored pile in complex geology | |
| CN107740348A (en) | A kind of curing means of bridge anti-collision wall | |
| CN212612304U (en) | Water delivery open channel concrete panel crack repair structure | |
| CN218990173U (en) | Secondary hole cleaning device for bored pile | |
| CN207667806U (en) | A kind of concrete gravel separator | |
| CN208131132U (en) | A kind of method for recycling waste concrete | |
| CN206692637U (en) | A kind of armored concrete prefabricated biogas generating pit system | |
| CN216827841U (en) | Leftover material recycling system of autoclaved aerated block production line | |
| CN114307274B (en) | Mud scraper, mud guiding device and mud sedimentation tank for sewage treatment | |
| CN211777290U (en) | Pipe gas-lift reverse circulation hole cleaning equipment and hole cleaning system comprising same | |
| CN113738294B (en) | Pore-forming device of full-hydraulic drilling machine and construction method thereof | |
| CN219431796U (en) | Well flushing device suitable for deep foundation pit excavation tubular well dewatering | |
| CN217758815U (en) | Curtain cementer based on clay cream thick liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |