CN111254924A - Application method for road and bridge construction by using high-pressure jet grouting pile nozzle - Google Patents
Application method for road and bridge construction by using high-pressure jet grouting pile nozzle Download PDFInfo
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- CN111254924A CN111254924A CN202010165171.5A CN202010165171A CN111254924A CN 111254924 A CN111254924 A CN 111254924A CN 202010165171 A CN202010165171 A CN 202010165171A CN 111254924 A CN111254924 A CN 111254924A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 239000007921 spray Substances 0.000 claims abstract description 111
- 239000002002 slurry Substances 0.000 claims abstract description 79
- 238000005553 drilling Methods 0.000 claims abstract description 44
- 239000002689 soil Substances 0.000 claims abstract description 43
- 230000008569 process Effects 0.000 claims abstract description 17
- 230000000712 assembly Effects 0.000 claims abstract description 8
- 238000000429 assembly Methods 0.000 claims abstract description 8
- 239000004568 cement Substances 0.000 claims description 46
- 239000011440 grout Substances 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 239000004575 stone Substances 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011550 stock solution Substances 0.000 description 3
- 206010024796 Logorrhoea Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
-
- 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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
- E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a using method for road and bridge construction by using a high-pressure jet grouting pile nozzle, which comprises a rod body and a conical head, wherein the rod body is of a cavity structure, and a slurry conveying pipe is arranged in the cavity; a movable component is also arranged in the cavity of the rod body; the outer wall of the circumference of the rod body is also provided with a plurality of drill blades, when the movable assembly moves towards the direction of the conical head, the movable assembly can push the drill blades to move towards the direction away from the rod body, and the side walls of the drill blades towards the direction of the conical head are provided with baffles; the cavity of the rod body is also internally provided with a telescopic pipe, one end of the telescopic pipe is communicated with the slurry conveying pipe, the other end of the telescopic pipe is provided with a joint, the circumferential outer wall of the rod body is also provided with spray head assemblies with the same number as the drill leaves, one end of each spray head assembly faces the drill leaves, and the other end of each spray head assembly is positioned in the cavity of the rod body. The invention can adjust the diameter of the pile hole drilled by the drill bit, meet different use requirements, and simultaneously ensure that the drill bit can prevent soil and stones in soil from blocking the slurry conveying pipe in the drilling process, thereby improving the construction efficiency.
Description
Technical Field
The invention relates to the technical field of road and bridge construction equipment, in particular to a using method for road and bridge construction by using a high-pressure jet grouting pile nozzle.
Background
The high-pressure rotary jet pile is characterized by that it utilizes high-pressure rotating nozzle to spray cement slurry into soil layer and mix it with soil body to form continuous lapped cement reinforced body. The construction occupies less land, has small vibration and lower noise, has the advantages of wood and steel saving, durability, low manufacturing cost and the like, and is widely used in foundation engineering of hydraulic buildings, industrial buildings, civil buildings and bridges. The high-pressure jet grouting pile is characterized in that a jet grouting pipe and a nozzle drill are arranged at a designed elevation at the bottom of the pile by using a drilling machine, prepared grout in advance is sprayed out from a nozzle at the edge of the grouting pipe at a high speed after obtaining huge energy through a high-pressure generating device to form a stream with highly concentrated energy, a soil body is directly damaged, a drill rod is lifted while rotating in the spraying process, so that the grout and the soil body are fully stirred and mixed, and a columnar solidification body with a certain diameter is formed in the soil, so that a foundation is reinforced. The construction is generally divided into two working flows, namely drilling, then drilling, jetting, and then lifting and rotating. The jet grouting drill bit is a key component during jet grouting pile construction, and can drill deep into a stratum and spray slurry on the other hand.
At present, the stake hole size that present majority drill bit formed is all fixed, can't be according to the use needs of reality, come the nimble size that forms the stake hole of adjusting the drill bit and drilling down, simultaneously because most shower nozzles all distribute on the circumference outer wall of drill bit, make the in-process that the high pressure spouts the stake machine in soil drilling down soon, rubble piece and earth in the soil enter into to the nozzle easily, stop up the defeated thick liquid pipe plug, thereby make the unable normal outflow of grout, make follow-up work progress can't continue to go on, need consume manpower and time and pull out the drilling rod and dredge behind the hole, the event has reduced the efficiency of construction, the time limit for a project has been delayed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a using method for road and bridge construction by using a high-pressure jet grouting pile nozzle, which can adjust the diameter of a pile hole drilled by a drill bit, meet different use requirements and simultaneously ensure that the drill bit can prevent soil and stones in soil from blocking a grout pipe in the drilling process, thereby improving the construction efficiency.
The invention is realized by the following technical scheme:
a use method for road and bridge construction by using a high-pressure jet grouting pile nozzle comprises the following steps:
1) mounting the rod body on a high-pressure jet grouting pile machine;
2) introducing high-pressure water into the liquid storage cavity of the conical piece by using a water pump, wherein the high-pressure water pushes the movable assembly to move along the axial direction of the slurry conveying pipe and pushes the drill blade to extend out of the rod body;
3) adjusting the extending length of the drill blade according to the inner diameter of the pile hole to be drilled;
4) driving a drill bit to rotate by using a high-pressure jet grouting pile machine, and drilling the soil;
5) in the drilling process of the drill bit, when the inner diameter of a pile hole needs to be enlarged, high-pressure water is continuously introduced into the liquid storage cavity of the conical part, so that the conical part is forced to push the drill blade to extend outwards;
6) when the drilling operation of the pile hole is finished, cement paste is introduced into the grout conveying pipe, enters the joint through the telescopic pipe, and forces the joint to stretch the telescopic pipe to move towards the direction of the spray head assembly;
7) when the joint moves to the second spray pipe, the second spray pipe is inserted into the cavity of the joint through the interface, and the sealing plate is pushed to compress the third elastic piece, so that the slurry inlet on the second spray pipe is communicated with the cavity of the joint, and finally the cement slurry in the cavity is sprayed out through the first spray pipe;
8) the cement paste sprayed out of the first spray pipe acts on the drill blade and then flows into the pile hole, and the high-pressure rotary spraying pile machine is used for driving the drill bit to slowly rotate and ascend in sequence to perform grouting operation on the pile hole;
9) after the grouting of the pile hole is finished, cooling and solidifying cement paste in the pile hole, and finishing the construction of a pile hole concrete structure;
10) sucking out the cement slurry remained in the slurry conveying pipe by using a water pump;
11) introducing a cleaning fluid into the slurry conveying pipe, wherein the cleaning fluid sequentially flows through the extension pipe, the joint, the second spray pipe and the first spray pipe to clean residual cement slurry;
the high-pressure rotary jet grouting pile nozzle comprises a rod body and a conical head, wherein the conical head is positioned at the bottom end of the rod body, a water spray pipe communicated with the bottom of the conical head is arranged in the rod body, the rod body is of a cavity structure, the water spray pipe is positioned in a cavity, a slurry conveying pipe is arranged in the cavity, and the water spray pipe penetrates through the slurry conveying pipe; the cavity of the rod body is also internally provided with a movable assembly, the movable assembly is sleeved on the outer wall of the slurry conveying pipe and can move along the axial direction of the slurry conveying pipe; the drill blade is distributed on the rod body in a circular array along the axial direction of the rod body, and the drill blades obliquely penetrate into the cavity of the rod body towards the direction of the conical head; the utility model discloses a drilling device, including the body of rod, the body of rod is equipped with the body of rod, still be equipped with the flexible pipe that quantity is the same with bore leaf quantity in the cavity of the body of rod, flexible pipe one end and defeated thick liquid pipe intercommunication, be equipped with the joint on the other end, still be equipped with a plurality of shower nozzle subassemblies on the circumference outer wall of the body of rod, the one end of shower nozzle subassembly is towards boring the leaf, and.
The outside diameter of the traditional drill bit is mostly fixed, therefore, in the actual construction process, the inside diameter of the pile hole formed by the drill bit is fixed, therefore, when constructing outdoor roads and bridges, the drill bits with different specifications are generally required to be carried, which increases the inconvenience of transportation, therefore, the technical proposal is that a plurality of drill leaves are arranged on the rod body of the drill bit, the drill leaves are distributed on the rod body in a circular array mode, because the rod body in the technical proposal is internally provided with a movable component, the movable component is pushed to move along the axial direction of the slurry conveying pipe by utilizing the outside high-pressure medium to push the drill leaves to extend out from the rod body, the length of the drill leaves extending out from the rod body is adjusted by controlling the moving distance of the high-pressure medium pushing movable component, when the high-pressure rotary jet pile driver is utilized to drive the drill bit to rotate to enter the soil, the drill leaves extending out of the rod body are utilized to act on the soil, finally forming a pile hole, so that the length of the drill blade extending out of the rod body is utilized to adjust the size of the formed pile hole, thereby meeting the construction requirements of different pile holes; meanwhile, in the process of drilling by the drill bit, the extending length of the drill leaf can be adjusted in real time by utilizing the movable assembly, so that a pile hole with multiple sections and different inner diameters is finally formed, the concrete structure with different diameter sections finally formed in the soil is improved, the overall strength of the concrete structure is improved, and the drill bit is particularly suitable for high-water-content or soft geology.
Meanwhile, in the process of drilling by a drill bit in the traditional technology, soil and broken stones in the soil easily enter a nozzle to cause blockage of a slurry conveying pipe, and cement slurry cannot be smoothly conveyed into a pile hole, therefore, the drill leaves are obliquely arranged on a rod body in the technical scheme, so that on one hand, when the drill bit drives the drill leaves to rotate, the drill leaves in an oblique state can simultaneously act on the soil at different depths, the area of the drill leaves contacting the soil in the same vertical direction is increased, thicker soil can be cut, and the cutting effect of the drill leaves on the soil is improved; on the other hand, the drill blade is obliquely arranged on the rod body and used for protecting the spray head component to a certain extent, the drill blade is obliquely arranged on the spray head component, so that when the drill bit drills soil, the drill blade in an oblique state can block part of soil and gravels, the condition that the soil and the gravels enter the spray head component is effectively reduced, the protective capability of the spray head component is further improved, a baffle is further arranged on the drill blade, the risk that the soil and the gravels enter the spray nozzle in the rotating process of the drill bit can be further blocked by the arranged baffle, meanwhile, the spray nozzle end of the spray head component is in an upward oblique state, the drill bit is in the drilling process by matching with the drill blade and the baffle, the risk that the soil and the gravels on two sides enter the spray head component is effectively avoided, and the joint and the spray head component arranged in the rod body are in a disconnected state in the drilling process, therefore, even when a small part of soil enters the spray head assembly, the soil cannot continue to enter the slurry conveying pipe, and the length of the spray head assembly is short, and the angle of the corner is large, so that when the joint is communicated with the spray head assembly, a small amount of soil in the spray head assembly can be flushed out by utilizing the impact force of cement slurry, and the influence on the whole use of the drill bit is avoided.
Further, the movable assembly comprises a conical part and a connecting pipe, the conical part is located at the bottom of the connecting pipe, a liquid storage cavity is formed in the conical part and communicated with the connecting pipe, and the slurry conveying pipe is sequentially inserted into the connecting pipe and the liquid storage cavity.
The connecting pipe that sets up is connected with external high-pressure medium, and the high-pressure medium that adopts in this technical scheme is preferred to be water liquid, utilizes external high-pressure equipment to let in water to the connecting pipe, and the water pressure that the water of high pressure state produced drives the cone spare and moves down on the outer wall of defeated thick liquid pipe, and the cone spare is at the in-process that moves down, and the circular cone section of cone spare acts on the drilling leaf in proper order, forces the drilling leaf to move outwards to the regulation of adjusting the drilling leaf extension length has been reached.
Furthermore, a first elastic piece is further arranged on the drill leaf, and the first elastic piece is sleeved on the drill leaf and is positioned in the cavity of the rod body.
The first elastic part is a spring with certain elasticity, when the external high-pressure water pushes the movable component to move on the slurry conveying pipe, the drill blade extends outwards, and the first elastic element is compressed to force the first elastic element to be in a compressed state, when the extended drilling blades need to retract inwards for a certain distance, a part of high-pressure water in the liquid storage cavity of the conical element is discharged, under the action of the first elastic piece, the conical piece is pushed to move upwards for a certain distance, so that the drill blade can retract for a certain distance, thereby realizing the flexible adjustment of the extending length of the drill blade, so that in the working process of the drill bit, the high-pressure water in a part of the movable assembly is discharged, the extending length of the drill blade can be adjusted in real time, therefore, the drilling blade can cut pile holes with different inner diameters, the finally formed concrete structure can be stably fixed in the pile holes, and the stability of the finally formed concrete structure is improved.
Further, be equipped with the cavity on the joint and with the interface that the shower nozzle subassembly matches, the interface is towards the shower nozzle subassembly to with the cavity intercommunication, the shower nozzle subassembly can insert to the cavity in through the interface. And a third elastic piece and a sealing plate are also arranged in the cavity of the joint, and the third elastic piece can push the sealing plate to seal the interface.
The joint that sets up communicates with defeated thick liquid pipe through flexible pipe, when needs are in milk to the stake hole of getting bored, the intraductal grout of carrying of defeated thick liquid, grout passes through flexible pipe entering and connects in the cavity, because the interface shutoff that third elastic component produced when initial condition is connecting, make grout get into to the cavity back that connects, along with the pressure in the joint strengthens gradually, finally force flexible pipe to take place tensile, and then make the joint move towards shower nozzle subassembly direction, make the shower nozzle subassembly that is located body of rod cavity insert to the cavity that connects through the interface, promote closing plate compression third elastic component, finally make joint and shower nozzle subassembly be in the connected state, and then make grout spout through the shower nozzle subassembly, carry out the grout operation to the stake hole of getting bored.
Meanwhile, in the technical scheme, in order to prevent soil on two sides of the drill bit from entering the nozzle assembly, the nozzle is arranged in an upward inclined mode, when cement slurry is sprayed out of the nozzle assembly in an upward inclined mode, due to the existence of the drill leaves, the cement slurry can be prevented from being sprayed in an upward inclined mode, so that the cement slurry flows downwards along the drill leaves after colliding with the drill leaves, the cement slurry is finally filled in drilled pile holes and is finally cooled and solidified to form a concrete structure, the inclined drill leaves can also play a certain role in stopping the cement slurry in grouting, on one hand, the phenomenon that the cement sprayed out in an inclined mode cannot effectively fill the pile holes, and part of the cement slurry is sprayed out of the pile holes and waste of part of resources is avoided; another convenience is because it has certain velocity of flow to let in to defeated thick liquid intraductal grout, make when grout sprays out from the shower nozzle subassembly at a high speed, can preferentially act on and bore the leaf, absorb the high-speed spun ability of grout, later in flowing into to the stake hole of getting bored, avoid the grout of spraying out at a high speed to act on the earth on the stake downthehole wall, cause being washed away of earth, and then sneak into in making the grout and washed away the earth, lead to the reduction of concrete structure intensity, consequently, utilize the condition emergence that the grout blockked up defeated thick liquid pipe not only can effectively to avoid earth to take place with the subassembly of spouting of the brill leaf of slope state, can also avoid simultaneously the grout of spraying out at a high speed to cause the destruction to the stake hole inner wall of getting, finally lead to the decline.
Further, the shower nozzle subassembly includes first spray tube and second spray tube, first spray tube sets up on the body of rod towards boring the slope of leaf to with the second spray tube intercommunication, second spray tube one end and first spray tube intercommunication, the other end are enclosed construction, still be equipped with a plurality of thick liquid mouths of advancing on the circumference outer wall of second spray tube to the thick liquid mouth of advancing is close to the blind end in second spray tube.
The shower nozzle subassembly that sets up adopts first spray tube and second spray tube to constitute, the first spray tube of setting is used for the slope to set up on the circumference outer wall of the body of rod, and the second spray tube of setting be used for can with connect the intercommunication, when connecting towards second spray tube direction removal, utilize the second spray tube to insert to the interface that connects in, promote closure plate compression third elastic component, when advancing on the second spray tube thick liquid mouth and entering to the cavity that connects in, the grout that is located to connect enters into to the second spray tube through the grout inlet in the second spray tube in, finally spout through first spray tube, the effect is downthehole with the stake of getting bored.
Furthermore, a dredging rod is further arranged in the second spray pipe, a dredging ball is arranged at one end of the dredging rod, and the other end of the dredging rod penetrates through the closed end of the second spray pipe and is connected with the sealing plate.
The dredging rod is used for loosening a small amount of soil entering the second spray pipe, when cement slurry is fed into the slurry conveying pipe, the joint is forced to move towards the second spray pipe, at the moment, one end of the dredging rod is connected with the sealing plate in the joint, so that the joint can drive the loosening rod to move in the second spray pipe and loosen the soil entering the second spray pipe in the moving process, when the joint is close to the second spray pipe and the second spray pipe enters the joint of the joint, and the sealing plate is pushed to compress the third elastic part, the loosening rod can move along with the sealing plate, the loosening rod can move back and forth in the second spray pipe, the purpose of loosening the soil in the second spray pipe is achieved, meanwhile, the contact area of the dredging ball arranged on the loosening rod to the soil can be increased, and the loosening effect of the soil is further improved, finally, when cement slurry enters the second spray pipe, soil in the second spray pipe can be easily discharged; on the other hand, the loose pole that utilizes to set up can play certain guide effect to the third elastic component, avoids the third elasticity to take place the distortion at the compression or the in-process that rises to lead to the closing plate can't effectively carry out the shutoff to the interface, consequently, because loose pole runs through the blind end at the second spray tube, it can only remove along the axial direction of self, so can lead to the third elastic component well, guarantees that the shutoff board can effectively plug up the interface.
Furthermore, the telescopic pipe is a corrugated pipe, a second elastic part is arranged on the telescopic pipe, and the second elastic part is sleeved on the telescopic pipe.
The arranged extension pipe is preferably a corrugated pipe, so that the extension pipe can extend and retract in the horizontal direction, the joint is driven to move towards the second spray pipe, the joint can be smoothly connected with the second spray pipe, and the second elastic piece can play a certain supporting role on the extension pipe, so that the corrugated pipe can be linearly distributed on the outer side of the pulp conveying pipe, and the joint can be aligned and connected with the second spray head; on the other hand when need stop to the stake downthehole grout of getting bored, because the pressure of grout in the defeated thick liquid pipe weakens, under the combined action of second elastic component for connect towards retracting back, force to connect and take place the disconnection with the second spray tube, under the effect of third elastic component, utilize the closing plate to carry out the shutoff from new butt joint mouth, thereby realized connecting the quick disconnection with the shower nozzle subassembly, realize the quick stagnant flow to grout, avoid remaining the cement in the defeated thick liquid pipe will scatter to all around, not only cause the pollution of environment, still cause the waste of grout simultaneously.
Further, the cavity of the rod body is also internally provided with sleeves the number of which is the same as that of the telescopic pipes, one end of each sleeve is fixed on the outer wall of the slurry conveying pipe, the other end of each sleeve is connected with the inner wall of the cavity of the rod body, the inner diameter of each sleeve is consistent with the outer diameter of the corresponding joint, and the corresponding joints and the second elastic pieces are both positioned in the sleeves.
Because the flexible pipe that sets up among this technical scheme has certain deformation volume, when making the intraductal cement of defeated thick liquid to get into to the flexible intraductal, the grout that has certain impact force will drive flexible pipe and take place the swing, and then make and connect the swing in the cavity of the body of rod, finally lead to connecting the unable accurate second spray tube butt joint with the shower nozzle subassembly, for this reason, this technical scheme has set up the sleeve in the cavity of the body of rod, overlap the sleeve on the joint, because the external diameter that connects is unanimous with telescopic internal diameter, therefore, in time flexible pipe receives the impact force of grout and takes place the swing, also can't drive the joint and take place the swing, consequently, the restriction that the sleeve that sets up can be fine connects and can only move along the straight line direction, thereby guarantee.
Further, the number of the spray head assemblies is larger than the number of the drill blades.
Preferably, some shower nozzle subassemblies are located the below of each drilling leaf, and remaining shower nozzle subassemblies are located between each adjacent drilling leaf, because the stake downthehole diameter that the drilling leaf bored in soil was got is the different internal diameter of multistage, there is the dead angle region easily, in order to carry out the construction of being in milk to the dead angle region better, consequently with some shower nozzle subassemblies setting between each drilling leaf, because the shower nozzle subassembly is in the state of tilt up, consequently, tilt up spun grout can be well to the dead angle region in stake hole and handle, thereby avoided the production in dead angle region, improved whole stake hole grouting effect.
Furthermore, the included angle between the first spray pipe of the spray head assembly and the rod body is 10-45 degrees.
Set up like this on the one hand and can guarantee that first spray tube can and the body of rod between have less contained angle to reduced external earth, garrulous stone and entered into the risk in the first spray tube, on the other hand guarantees that first spray tube spun grout can be in slope spun state up, guarantees effectively to the downthehole blind spot region of stake to be in the grout.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the application method for road and bridge construction by using the high-pressure jet grouting pile nozzle, the extending distance of the drill rod can be adjusted by using the arranged movable assembly, so that pile holes with different sizes can be drilled, the extending length of the drill blade can be adjusted in real time when the drill bit works, flexible selection can be performed according to actual working conditions, and the functionality of the drill bit is improved;
2. according to the application method for road and bridge construction by using the high-pressure jet grouting pile nozzle, the inclined drilling blade can increase the depth of the drilling blade acting on soil, so that the efficiency of drilling a pile hole is improved, and the baffle plate on the drilling blade can prevent soil generated in the working process from entering the nozzle assembly to protect the nozzle assembly to a certain extent;
3. when cement slurry in a slurry conveying pipe is sprayed out of a nozzle assembly at a high speed, the inclined drill blade can be used for preventing the cement slurry from being sprayed out of a pile hole to cause waste of the cement slurry, and the drill blade can be used for preventing the cement slurry sprayed out at a high speed from scouring soil on the inner wall of the pile hole, so that washed soil is prevented from being mixed into the cement slurry to cause reduction of the strength of a concrete structure;
4. according to the application method for road and bridge construction by using the high-pressure jet grouting pile nozzle, the arranged joint can be quickly communicated with the nozzle assembly, so that cement paste in the grout conveying pipe can be sprayed out through the nozzle assembly, meanwhile, the joint and the nozzle assembly can be quickly disconnected by using the arranged second elastic piece and the second elastic piece, the cement paste remained in the grout conveying pipe after grouting of a pile hole is finished is prevented from scattering around, and waste of the cement paste is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of another embodiment of the present invention;
FIG. 3 is an enlarged view of part A of the present invention;
FIG. 4 is an enlarged view of the part B of the present invention;
FIG. 5 is a schematic view of the connection structure of the movable assembly and the slurry pipe of the present invention.
Reference numbers and corresponding part names in the drawings:
1-rod body, 2-movable assembly, 3-slurry conveying pipe, 4-first elastic part, 5-drilling blade, 6-conical head, 7-water spraying pipe, 8-spray head assembly, 9-second elastic part, 10-baffle, 11-loosening rod, 12-joint, 13-third elastic part, 14-loosening ball, 15-slurry inlet, 16-sealing plate, 17-cavity, 18-first spray pipe, 19-second spray pipe, 20-connecting pipe, 21-liquid storage cavity, 22-conical part and 23-sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1 to 5, the method comprises the following steps:
1) installing the rod body 1 on a high-pressure jet grouting pile machine;
2) introducing high-pressure water into the liquid storage cavity 21 of the conical part 22 by using a water pump, wherein the high-pressure water pushes the movable assembly to move along the axial direction of the slurry conveying pipe 3 and pushes the drill blade 5 to extend out of the rod body 1;
3) adjusting the extending length of the drilling blade 5 according to the inner diameter of the pile hole to be drilled;
4) driving a drill bit to rotate by using a high-pressure jet grouting pile machine, and drilling the soil;
5) in the drilling process of the drill bit 6, when the inner diameter of a pile hole needs to be enlarged, high-pressure water is continuously introduced into the liquid storage cavity 21 of the conical part 22, so that the conical part 22 is forced to push the drill blade 5 to extend outwards;
6) when the drilling operation of the pile hole is finished, cement slurry is introduced into the slurry conveying pipe, enters the joint 12 through the telescopic pipe, and forces the joint 12 to stretch the telescopic pipe to move towards the direction of the spray head component 8;
7) when the joint 12 moves to the second nozzle 19, the second nozzle 19 is inserted into the cavity 17 of the joint 12 through the interface, and the sealing plate 16 is pushed to compress the third elastic member 13, so that the grout inlet 15 on the second nozzle 19 is communicated with the cavity 17 of the joint 12, and finally, grout in the cavity 17 is sprayed out through the first nozzle 18;
8) the cement slurry sprayed out of the first spray pipe 18 acts on the drill blade and then flows into the pile hole, and the drill bit is driven by the high-pressure jet grouting pile driver to rotate and ascend slowly in sequence so as to perform grouting operation on the pile hole;
9) after the grouting of the pile hole is finished, cooling and solidifying cement paste in the pile hole, and finishing the construction of a pile hole concrete structure;
10) sucking out the cement slurry remained in the slurry conveying pipe 3 by using a water pump;
11) and cleaning fluid is introduced into the slurry conveying pipe 3, and flows through the extension pipe, the joint 12, the second spray pipe 19 and the first spray pipe 18 in sequence to clean residual cement slurry, so that the slurry conveying pipe is prevented from being blocked after the cement slurry is solidified.
The high-pressure jet grouting pile nozzle comprises a rod body 1 and a conical head 6, wherein the conical head 6 is positioned at the bottom end of the rod body 1, a water spraying pipe 7 communicated with the bottom of the conical head 6 is arranged in the rod body 1, a cavity structure is arranged in the rod body 1, the water spraying pipe 7 is positioned in the cavity, a slurry conveying pipe 3 is arranged in the cavity, and the water spraying pipe 7 penetrates through the slurry conveying pipe 3; a movable assembly 2 is further arranged in the cavity of the rod body 1, the movable assembly 2 is sleeved on the outer wall of the slurry conveying pipe 3, the movable assembly 2 can move along the axial direction of the slurry conveying pipe 3, and baffle plates 10 are arranged on the side walls of the drill blades 5 facing the direction of the conical head 6; the drill rod comprises a rod body 1, a plurality of drill blades 5 and a movable assembly 2, wherein the drill blades 5 are arranged on the circumferential outer wall of the rod body 1, the drill blades 5 are distributed on the rod body 1 in a circular array along the axial direction of the rod body 1, the drill blades 5 obliquely penetrate into a cavity of the rod body 1 towards the direction of a conical head 6, and when the movable assembly 2 moves towards the direction of the conical head 6, the movable assembly 2 can push the drill blades 5 to move towards the direction far away from the rod body 1; the utility model discloses a grout spraying device, including the body of rod 1, the body of rod 1 is equipped with the body of rod 1, still be equipped with the flexible pipe that the quantity is the same with drilling leaf 5 quantity in the cavity of the body of rod, flexible pipe one end and defeated thick liquid pipe 3 intercommunication, be equipped with joint 12 on the other end, still be equipped with the shower nozzle subassembly 8 that the quantity is the same with drilling leaf 5 quantity on the circumference outer wall of the body of rod 1, the one end of shower nozzle subassembly 8 is towards drilling leaf 5, and the other end is located the cavity of the body of rod 1 to flush with joint 12, when flexible pipe drive joint.
Example 2
On the basis of embodiment 1, movable assembly 2 includes cone 22 and connecting pipe 20, cone 22 is located the bottom of connecting pipe 20, be equipped with stock solution chamber 21 in the cone 22 to stock solution chamber 21 and connecting pipe 20 intercommunication, defeated thick liquid pipe 3 alternates in connecting pipe 20 and stock solution chamber 21 in proper order.
Example 3
On the basis of the embodiment 1, the drill blade 5 is further provided with a first elastic member 4, and the first elastic member 4 is sleeved on the drill blade 5 and is located in the cavity of the rod body 1.
Example 4
On the basis of embodiment 1, the joint 12 is provided with a cavity 17 and an interface matched with the spray head assembly 8, the interface faces the spray head assembly 8 and is communicated with the cavity 17, and the spray head assembly 8 can be inserted into the cavity 17 through the interface. The cavity 17 of the joint 12 is further provided with a third elastic element 13 and a sealing plate 16, and the third elastic element 13 can push the sealing plate 16 to seal the interface.
Example 5
On the basis of embodiment 4, the spray head assembly 8 comprises a first spray pipe 18 and a second spray pipe 18, the first spray pipe 18 is obliquely arranged on the rod body 1 towards the drilling blade 5 and is communicated with the second spray pipe 19, one end of the second spray pipe 19 is communicated with the first spray pipe 18, the other end of the second spray pipe is of a closed structure, a plurality of slurry inlets 15 are further arranged on the circumferential outer wall of the second spray pipe 19, and the slurry inlets 15 are close to the closed end of the second spray pipe 19.
Example 6
On the basis of the embodiment 5, the second spray pipe 19 is also internally provided with a dredging rod 11, one end of the dredging rod 11 is provided with a dredging ball 14, and the other end of the dredging rod penetrates through the closed end of the second spray pipe 19 to be connected with the sealing plate 16.
Example 7
On the basis of the embodiment 1, the extension tube is a corrugated tube, a second elastic member 9 is arranged on the extension tube, and the second elastic member 9 is sleeved on the extension tube.
Example 8
On the basis of embodiment 1, the cavity of the rod body 1 is further provided with guide plates 23, the number of which is the same as that of the telescopic pipes, one end of each guide plate 23 is connected with the inner wall of the cavity of the rod body 1, the other end of each guide plate is connected with the outer wall of the slurry conveying pipe 3, the guide plates 23 are respectively positioned above the telescopic pipes, the bottoms of the guide plates 23 are respectively provided with a guide groove, the guide grooves are arranged along the axial direction of the telescopic pipes, a sliding block 24 is arranged in each guide groove, the sliding block 24 can move in each guide groove, the bottoms of the sliding blocks 24 are respectively provided with a connecting rod 25, and the connecting rods 25 are connected with the joints.
Example 9
On the basis of embodiment 5, the number of the nozzle assemblies 8 provided in this embodiment is greater than the number of the drill blades 5, preferably eight, since the number of the drill blades 5 is four, and the drill blades 5 are distributed on the circumferential outer wall of the rod body 1 in a circular array around the axial direction of the rod body 1, wherein the four nozzle assemblies 8 are distributed below each drill blade 5, and the remaining four nozzle assemblies 8 are respectively located between two adjacent drill blades 5, so that a part of the nozzle assemblies 8 are located below the drill blades 5 as in embodiment 1, and the remaining nozzle assemblies 8 are located between two adjacent drill blades 5, since the drill blades 5 form a pile hole with an irregular inner diameter during the drilling process, when the pile hole with the inner diameter is grouted, since the inner diameter of some sections of the pile hole is larger, the inner diameter of some sections is smaller, and the rod body 1 keeps a vertical direction all the time during the operation, therefore, when the rod body 1 is poured, dead angles are easy to occur on the pile hole section above the nozzle assembly 8, and the pile hole section cannot be effectively and quickly poured, so that in order to effectively grout the dead angles, a part of the nozzle assembly 8 is arranged between two adjacent drill blades 5, the nozzle assembly 8 which is obliquely arranged upwards is not blocked by the drill blades 5, when cement slurry is sprayed out from the nozzle assembly 8, the nozzle assembly 8 between the drill blades 5 is also in an upward inclined state, so that the cement slurry forms an upward-throwing parabola after being sprayed out from the nozzle assembly 8, when the cement slurry reaches the highest point, the cement slurry is thrown downwards, and finally a parabola with an opening facing towards the top is formed, and because the spraying track of the arc track, the cement slurry has a certain inclination angle in the upward-throwing or downward-throwing process, so that the cement slurry can be effectively sprayed to a dead angle area, and grouting the dead angle area of the pile hole, thereby improving the pouring effect of the pile hole.
Example 10
On embodiment 9's basis, contained angle between first spray tube 18 and the body of rod 1 is 10-45, sets up like this and to guarantee on the one hand that first spray tube 18 can and the body of rod 1 between have less contained angle to reduced external earth, garrulous stone and entered into the risk to first spray tube 18 in, on the other hand guarantees that first spray tube 18 spun grout can be in the slope spun state up, guarantees effectively to carry out effective grout to the downthehole dead angle region of stake.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A use method for road and bridge construction by using a high-pressure jet grouting pile nozzle is characterized by comprising the following steps:
1) the rod body (1) is arranged on a high-pressure jet grouting pile machine;
2) introducing high-pressure water into the liquid storage cavity (21) of the conical piece (22) by using a water pump, wherein the high-pressure water pushes the movable assembly to move along the axial direction of the slurry conveying pipe (3) and pushes the drill blade (5) to extend out of the rod body (1);
3) the extending length of the drilling blade (5) is adjusted according to the inner diameter of the pile hole to be drilled;
4) driving a drill bit to rotate by using a high-pressure jet grouting pile machine, and drilling the soil;
5) in the drilling process of the drill bit (6), when the inner diameter of a pile hole needs to be enlarged, high-pressure water is continuously introduced into the liquid storage cavity (21) of the conical piece (22) to force the conical piece (22) to push the drill blade (5) to extend outwards;
6) when the drilling operation of the pile hole is finished, cement paste is introduced into the grout conveying pipe, enters the joint (12) through the telescopic pipe, and forces the joint (12) to stretch the telescopic pipe to move towards the direction of the spray head assembly (8);
7) when the joint (12) moves to the second spray pipe (19), the second spray pipe (19) is inserted into the cavity (17) of the joint (12) through the interface, and the sealing plate (16) is pushed to compress the third elastic piece (13), so that the grout inlet (15) on the second spray pipe (19) is communicated with the cavity (17) of the joint (12), and finally, the grout in the cavity (17) is sprayed out through the first spray pipe (18);
8) cement slurry sprayed out of the first spray pipe (18) acts on the drill blades and then flows into the pile hole, the drill bit is driven by the high-pressure jet grouting pile driver to rotate and ascend slowly in sequence, and grouting operation is carried out on the pile hole;
9) after the grouting of the pile hole is finished, cooling and solidifying cement paste in the pile hole, and finishing the construction of a pile hole concrete structure;
10) sucking out the cement slurry remained in the slurry conveying pipe (3) by using a water pump;
11) cleaning fluid is introduced into the slurry conveying pipe (3), and flows through the extension pipe, the joint (12), the second spray pipe (19) and the first spray pipe (18) in sequence to clean residual cement slurry;
the high-pressure jet grouting pile drill bit comprises a rod body (1) and a conical head (6), the conical head (6) is located at the bottom end of the rod body (1), a water spray pipe (7) communicated with the bottom of the conical head (6) is arranged in the rod body (1), a cavity structure is arranged in the rod body (1), the water spray pipe (7) is located in the cavity, a slurry conveying pipe (3) is arranged in the cavity, and the water spray pipe (7) penetrates through the slurry conveying pipe (3);
a movable assembly (2) is further arranged in the cavity of the rod body (1), the movable assembly (2) is sleeved on the outer wall of the slurry conveying pipe (3), and the movable assembly (2) can move along the axial direction of the slurry conveying pipe (3);
the drill rod is characterized in that a plurality of drill blades (5) are further arranged on the circumferential outer wall of the rod body (1), the drill blades (5) are distributed on the rod body (1) in a circular array along the axial direction of the rod body (1), the drill blades (5) obliquely penetrate into a cavity of the rod body (1) towards the direction of the conical head (6), when the movable assembly (2) moves towards the direction of the conical head (6), the movable assembly (2) can push the drill blades (5) to move towards the direction away from the rod body (1), and baffle plates (10) are arranged on the side walls of the drill blades (5) towards the direction of the conical head (6);
still be equipped with a plurality of flexible pipes in the cavity of the body of rod (1), flexible pipe one end and defeated thick liquid pipe (3) intercommunication are equipped with on the other end and connect (12), still be equipped with shower nozzle subassembly (8) that quantity and brill leaf (5) quantity are the same on the circumference outer wall of the body of rod (1), the one end of shower nozzle subassembly (8) is towards boring leaf (5), and the other end is located the cavity of the body of rod (1) to flush with joint (12), when flexible pipe drive connect (12) when moving towards shower nozzle subassembly (8) direction, connect (12) can communicate with shower nozzle subassembly (8).
2. The use method of the high-pressure jet grouting pile nozzle for road and bridge construction is characterized in that the movable assembly (2) comprises a conical part (22) and a connecting pipe (20), the conical part (22) is positioned at the bottom of the connecting pipe (20), a liquid storage cavity (21) is arranged in the conical part (22), the liquid storage cavity (21) is communicated with the connecting pipe (20), and the slurry conveying pipe (3) is sequentially inserted into the connecting pipe (20) and the liquid storage cavity (21);
the drill blade (5) is further provided with a first elastic part (4), and the first elastic part (4) is sleeved on the drill blade (5) and is located in the cavity of the rod body (1).
3. The use method of the high-pressure jet grouting pile nozzle for road and bridge construction is characterized in that the joint (12) is provided with a cavity (17) and an interface matched with the nozzle assembly (8), the interface faces the nozzle assembly (8) and is communicated with the cavity (17), and the nozzle assembly (8) can be inserted into the cavity (17) through the interface;
a third elastic piece (13) and a sealing plate (16) are further arranged in a cavity (17) of the joint (12), and the third elastic piece (13) can push the sealing plate (16) to seal the interface.
4. The use method of high-pressure jet grouting pile nozzle for road and bridge construction is characterized in that the nozzle assembly (8) comprises a first nozzle (18) and a second nozzle (19), the first nozzle (18) is obliquely arranged on the rod body (1) towards the drilling blade (5) and is communicated with the second nozzle (19), one end of the second nozzle (19) is communicated with the first nozzle (18), the other end of the second nozzle is of a closed structure, a plurality of slurry inlets (15) are further arranged on the circumferential outer wall of the second nozzle (19), and the slurry inlets (15) are close to the closed end of the second nozzle (19).
5. The use method of the high-pressure jet grouting pile nozzle for road and bridge construction is characterized in that a dredging rod (11) is further arranged in the second spray pipe (19), a dredging ball (14) is arranged at one end of the dredging rod (11), and the other end of the dredging rod penetrates through the closed end of the second spray pipe (19) to be connected with the sealing plate (16).
6. The use method of the high-pressure jet grouting pile nozzle for road and bridge construction according to claim 1, wherein the telescopic pipe is a corrugated pipe, a second elastic member (9) is arranged on the telescopic pipe, and the second elastic member (9) is sleeved on the telescopic pipe.
7. The use method of the high-pressure jet grouting pile nozzle for road and bridge construction according to claim 1 is characterized in that the number of sleeves (23) which is the same as that of the telescopic pipes are further arranged in the cavity of the rod body (1), one end of each sleeve (23) is fixed on the outer wall of the slurry conveying pipe (3), the other end of each sleeve (23) is connected with the inner wall of the cavity of the rod body (1), the inner diameter of each sleeve (23) is the same as the outer diameter of the joint (12), and the joint (12) and the second elastic part (9) are both located in the sleeves (23).
8. Use of a high pressure jet grouting pile nozzle for road and bridge construction according to claim 1, characterised in that the number of nozzle assemblies (8) is greater than the number of drill blades (5).
9. Use of a high pressure jet grouting pile nozzle for road and bridge construction according to claim 1, characterised in that the angle between the first nozzle pipe (18) of the nozzle assembly (8) and the shaft (1) is 10-45 °.
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| CN202010165171.5A CN111254924B (en) | 2020-03-11 | 2020-03-11 | Application method for road and bridge construction by using high-pressure jet grouting pile nozzle |
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| CN113622670A (en) * | 2021-08-16 | 2021-11-09 | 方远建设集团股份有限公司 | High-pressure grouting device for assembly type construction |
| CN113994852A (en) * | 2021-10-28 | 2022-02-01 | 宁国市东南木纤维科技有限公司 | Heavy metal soil green covering no-civil fiber spray-seeding construction method |
| CN115977093A (en) * | 2023-02-08 | 2023-04-18 | 青岛理工大学 | Rotary nozzle suitable for soft soil containing large gravels and method |
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