CN114541361A - Bidirectional stirring device and composite foundation construction method - Google Patents
Bidirectional stirring device and composite foundation construction method Download PDFInfo
- Publication number
- CN114541361A CN114541361A CN202210351400.1A CN202210351400A CN114541361A CN 114541361 A CN114541361 A CN 114541361A CN 202210351400 A CN202210351400 A CN 202210351400A CN 114541361 A CN114541361 A CN 114541361A
- Authority
- CN
- China
- Prior art keywords
- stirring
- rod
- bidirectional
- drill
- pile
- 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
- 238000003756 stirring Methods 0.000 title claims abstract description 262
- 238000010276 construction Methods 0.000 title claims abstract description 63
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 57
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 89
- 239000011440 grout Substances 0.000 claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 230000000712 assembly Effects 0.000 claims abstract description 12
- 238000000429 assembly Methods 0.000 claims abstract description 12
- 239000002689 soil Substances 0.000 claims description 56
- 238000002156 mixing Methods 0.000 claims description 47
- 239000003795 chemical substances by application Substances 0.000 claims description 32
- 239000004568 cement Substances 0.000 claims description 30
- 238000012856 packing Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000001976 improved effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
-
- 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
Abstract
The invention provides a bidirectional stirring device and a composite foundation construction method, wherein the bidirectional stirring device comprises: the drill bit is provided with a slurry outlet channel which penetrates through the axial direction of the drill bit, and one end of the slurry outlet channel forms a slurry outlet; the two reducing stirring assemblies are sequentially connected to one side of the drill bit, which is far away from the slurry outlet, along the axial direction of the drill bit, each reducing stirring assembly comprises a drill rod and a stirring unit arranged on the outer wall of the drill rod, the drill rod is provided with an inner channel which penetrates through the drill rod in the axial direction, and the inner channel is communicated with the slurry outlet channel; the grouting pipe is arranged in the inner channel, and the outlet end of the grouting pipe is communicated with the grout outlet channel; and the transmission assembly is arranged in the inner channel and used for driving the two drill rods to rotate in opposite directions respectively. So set up, on the one hand, the stirring diameter of stirring unit can be adjusted according to the construction needs, can save engineering time, improves the efficiency of construction. On the other hand, the construction of the variable-diameter pile body can be carried out by adjusting the stirring diameter of the stirring unit, so that the application range is wider, and the universality is stronger.
Description
Technical Field
The invention belongs to the technical field of cement-soil mixing pile construction, and particularly relates to a bidirectional mixing device and a composite foundation construction method.
Background
The highway and the high-speed railway are important signs of modern traffic, and the construction of the highway and the high-speed railway is beneficial to improving the rapid traffic among cities and promoting the economic development. During the construction of highways and highways, conditions of collapsible soil and soft soil in construction areas may be encountered. For the ground with collapsible soil and soft soil layer, in order to avoid the later settlement, the construction of cement soil mixing piles is usually carried out below the ground so as to improve the bearing capacity of the foundation.
The cement-soil mixing pile construction is a method for reinforcing saturated soft clay foundation, and it uses cement as solidifying agent, and utilizes mixing drill rod to forcedly mix soft soil and solidifying agent in the deep position of foundation so as to make the soft soil be hardened into pile body with integrity, water stability and a certain strength.
Because the diameter of the pile body needs to be changed according to the position of the pile body and the surrounding environment during actual construction, the stirring drill rod in the prior art is an equal-diameter drill rod, only equal-diameter pile bodies can be constructed, the stirring diameter of the stirring drill rod can not be flexibly adjusted along with the construction diameter of the pile body, the universality is poor, and the construction efficiency is influenced by replacing drill rods with different specifications.
Disclosure of Invention
The invention provides a bidirectional stirring device and a composite foundation construction method, and aims to solve the problems that in the prior art, a stirring drill rod is an equal-diameter drill rod, only an equal-diameter pile body can be constructed, the stirring diameter of the stirring drill rod can not be flexibly adjusted along with the construction diameter of the pile body, the universality is poor, and the construction efficiency is influenced by replacing drill rods with different specifications.
In order to realize the purpose, the invention adopts the technical scheme that:
in a first aspect, the present invention provides a bidirectional stirring device comprising: the drill bit is provided with a slurry outlet channel which penetrates through the drill bit in the axial direction of the drill bit, and one end of the slurry outlet channel forms a slurry outlet; the two reducing stirring assemblies are sequentially connected to one side, far away from the slurry outlet, of the drill bit along the axial direction of the drill bit, each reducing stirring assembly comprises a drill rod and a stirring unit arranged on the outer wall of the drill rod, the drill rod is provided with an inner channel penetrating through the drill rod in the axial direction, and the inner channel is communicated with the slurry outlet channel; the grouting pipe is arranged in the inner channel, and the outlet end of the grouting pipe is communicated with the grout outlet channel; the transmission assembly is arranged in the inner channel and used for driving the two drill rods to rotate in opposite directions respectively; wherein the stirring unit includes: one end of the first stirring rod is hinged to the drill rod; the second stirring rod and the first stirring rod are arranged in the same vertical plane, and one end of the second stirring rod is hinged with the other end of the first stirring rod; and the telescopic piece is arranged on the drill rod and is provided with a telescopic part which is axially telescopic along the drill rod and is hinged with the other end of the second stirring rod.
In one possible implementation, the grout tube includes: a tube body disposed in the inner passage; and the first packing part is arranged on the outer wall of the pipe body and is in sealing fit with the inner wall of the slurry outlet channel, the first packing part faces one side of the slurry outlet to form a slurry outlet cavity, and the area of the pipe body in the slurry outlet cavity is provided with a grouting outlet which penetrates through the slurry outlet channel and the inner cavity of the pipe body.
In a possible implementation manner, one end of the pipe body, which is positioned in the slurry outlet chamber, is closed, and the grouting outlet is positioned on the side wall of the pipe body; the grout pipe is still including locating the second of pipe body blind end seals the portion of separating, the second seals the portion of separating and is for following go out the spiral guide vane that thick liquid passageway axial set up, the outer fringe laminating of spiral guide vane in the inner wall that goes out the thick liquid passageway forms spiral channel.
In one possible implementation, the stirring unit further includes: the fixing sleeve is fixedly connected to the drill rod, and one ends of the first stirring rods are hinged to the fixing sleeve; and the adjusting sleeve is connected to the drill rod in a sliding mode along the axial direction of the drill rod and can synchronously rotate along with the drill rod, the other ends of the second stirring rods are hinged to the adjusting sleeve, and the telescopic portion is connected with the adjusting sleeve.
In a possible implementation manner, the reducing stirring assembly further comprises a plurality of travel switches arranged along the axial direction of the drill rod at intervals, and the travel switches are used for detecting the positions of the adjusting sleeves.
In one possible implementation, the bidirectional stirring device further includes an axial stirring assembly, the axial stirring assembly including: the adapter body is connected between the drill bit and the corresponding drill rod and is provided with an adapter channel which penetrates through the axial direction of the adapter body and is communicated with the inner channel and the slurry outlet channel; the spiral stirring blade is coaxially sleeved outside the connecting body, and the inner edge of the spiral stirring blade and the outer peripheral surface of the connecting body are arranged at intervals to form a mud outlet channel; and a dowel bar connected between the coupling body and the helical stirring blade.
In a possible implementation manner, the spiral stirring blade is provided with a plurality of mud outlet holes penetrating through in the thickness direction.
In a possible implementation manner, the first stirring rod and the second stirring rod are both provided with a plurality of stirring blades along the length direction of the first stirring rod and the second stirring rod, and the stirring blades are arranged on one side of the first stirring rod and one side of the second stirring rod, which are deviated from each other.
When the bidirectional stirring device is used, the bidirectional stirring device is arranged perpendicular to the ground, the drill bit faces downwards to break a soft mud layer, so that the drill bit and the drill rod can reach the designed depth, the stirring unit with the variable radial stirring range is arranged on the drill rod, the grouting pipe is used for grouting curing agent slurry into the drill bit, and the transmission assembly is used for driving the drill bit and the variable-diameter stirring assembly to rotate. So set up, on the one hand, when the pile body of different diameters is under construction to needs, the stirring diameter of stirring unit can adjust according to the construction needs, has removed the step that spare part demolishs the change from, can save engineering time, improves the efficiency of construction. On the other hand, when the same pile body is constructed, the construction of variable-diameter pile bodies (such as wedge-shaped pile bodies, nail-shaped pile bodies and the like) can be carried out by adjusting the stirring diameter of the stirring unit, so that the application range is wider, and the universality is stronger.
In a second aspect, the present invention provides a composite foundation construction method, comprising the steps of:
surveying the terrain, and determining a construction area;
carrying out construction of the cement-soil mixing piles in a construction area by using the bidirectional mixing device in any one of the above-mentioned implementation modes, and arranging a plurality of cement-soil mixing piles in the construction area at preset intervals;
and paving broken stone cushion layers and geogrids alternately on the top of the cement-soil mixing pile from bottom to top, wherein the broken stone cushion layers comprise three layers, and the geogrids comprise two layers.
In one possible implementation manner, the construction step of the cement-soil mixing pile includes:
positioning: determining a construction pile position, and mechanically moving a stirring pile to a specified pile position, wherein the stirring pile is provided with the bidirectional stirring device in any one of the above implementation modes;
pre-stirring and sinking: starting a stirring pile machine to enable the bidirectional stirring device to sink while stirring along the guide of the guide frame;
preparing a curing agent slurry, and pouring the curing agent slurry into a hopper before grouting;
spraying, stirring and rising: after the bidirectional stirring device sinks to the designed depth, the mortar pump is started to pour the curing agent slurry into the grouting pipe, after the curing agent slurry reaches the slurry outlet, the bidirectional stirring device is lifted at the speed of 0.5-0.8m/min, and the bidirectional stirring device is controlled to stir, spray and lift;
and (3) repeatedly stirring and sinking: controlling a stirring pile machine to enable a bidirectional stirring device to sink along a guide frame while stirring, and performing secondary stirring on the cement soil stirring pile with the preset depth, wherein the secondary stirring sinking speed is controlled to be 0.5-0.8 m/min;
spraying, stirring and lifting: after the bidirectional stirring device sinks to the designed depth, lifting the bidirectional stirring device at the speed of 0.5-0.8m/min, and controlling the bidirectional stirring device to stir, spray and lift simultaneously;
and (4) finishing the shift: mechanically moving the mixing pile to the next pile position;
and repeating the steps until the construction of all the cement soil mixing piles is completed.
According to the composite foundation construction method provided by the invention, the cement soil mixing piles are arranged below the ground of the construction area, so that the bearing capacity of the foundation can be improved, and the foundation settlement is reduced. The gravel cushion layer is arranged above the cement mixing pile, the whole bearing capacity of the ground collapsible soil can be improved, and meanwhile, the gravel cushion layer can also enable the whole stress of the foundation to be uniform as a buffer layer. Through pressing from both sides at the rubble bed course and establishing two-layer geogrid, can provide the binding power to the rubble bed course, reduce the removal of inside rubble, make rubble bed course overall structure stable, cement mixing pile, rubble bed course and geogrid combined action can improve the overall stability of ground, make construction quality obtain guaranteeing.
The composite foundation construction method provided by the invention adopts a bidirectional stirring process, and the two reducing stirring assemblies rotate in opposite directions simultaneously during stirring, so that the slurry is controlled between the two reducing stirring assemblies, the slurry cannot go up to the ground along with the drill rod, and the slurry bleeding phenomenon is eliminated. The two reducing stirring assemblies rotate in opposite directions simultaneously, so that soil and curing agent slurry are fully mixed, the curing agent can be uniformly distributed in the cement soil stirring pile, and the pile forming effect is good.
Drawings
FIG. 1 is a schematic structural diagram of a bidirectional stirring apparatus according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the inside of a bi-directional stirring apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a grouting pipe according to an embodiment of the invention;
FIG. 4 is a schematic structural view of an axial stirring assembly according to another embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a variable diameter stirring assembly according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of the inside of a variable diameter stirring assembly according to an embodiment of the present invention;
FIG. 7 is a schematic view of a composite foundation constructed using an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating an arrangement of cement mixing piles of a composite foundation constructed using an embodiment of the present invention;
fig. 9 is a comparison view of a conical pile and an equal-diameter pile in a soil-cement mixing pile constructed by using an embodiment of the present invention.
Description of reference numerals:
1. bidirectional stirring device
10. Drill bit 11, slurry outlet channel 12 and slurry outlet
20. Reducing stirring assembly 21, drill rod 211 and inner channel
212. Piston cavity 22, stirring unit 221 and fixing sleeve
222. First stirring rod 223, adjusting sleeve 224 and second stirring rod
225. Expansion part 226, stirring blade 23 and travel switch
30. Grouting pipe 31, pipe body 311, grouting outlet
32. First packing part 33, second packing part 40, axial stirring component
41. The connecting body 411, the connecting channel 42 and the spiral stirring blade
421. Mud outlet hole 43, dowel bar 2 and cement soil mixing pile
3. Broken stone cushion layer 4 and geogrid
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to," "secured to," or "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "in communication" it can be directly in communication with the other element via a passageway, or indirectly in communication with the other element via other elements, lines, valves, etc. When an element is referred to as being "disposed on," "disposed on" another element, it can be directly on the other element or intervening elements may also be present. "plurality" means two or more. "at least one" refers to one or more quantities. "a number" means one or more than one.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Referring to fig. 1 to 9, a bidirectional stirring apparatus 1 and a method for constructing a composite foundation according to an embodiment of the present invention will be described.
Referring to fig. 1, fig. 2 and fig. 5, in a first aspect, an embodiment of the present invention provides a bidirectional stirring apparatus 1, including: the drill bit 10 is provided with a slurry outlet channel 11 which penetrates through the axial direction of the drill bit, and one end of the slurry outlet channel 11 forms a slurry outlet 12; the two reducing stirring assemblies 20 are sequentially connected to one side, far away from the slurry outlet 12, of the drill bit 10 along the axial direction of the drill bit 10, each reducing stirring assembly 20 comprises a drill rod 21 and a stirring unit 22 arranged on the outer wall of the drill rod 21, the drill rod 21 is provided with an inner channel 211 penetrating through the drill rod 21 in the axial direction, and the inner channel 211 is communicated with the slurry outlet channel 11; the grouting pipe 30 is arranged in the inner channel 211, and the outlet end of the grouting pipe is communicated with the grout outlet channel 11; and a transmission assembly, which is arranged in the inner channel 211 and is used for driving the two drill rods 21 to rotate in opposite directions respectively.
Wherein, stirring unit 22 includes: a first stirring rod 222, one end of which is hinged to the drill rod 21; the second stirring rod 224 and the first stirring rod 222 are arranged in the same vertical plane, and one end of the second stirring rod is hinged with the other end of the first stirring rod 222; and a telescopic member provided to the drill rod 21 and having a telescopic portion 225 which is axially telescopic along the drill rod 21 and is hinged to the other end of the second stirring rod 224.
In the embodiment of the invention, the drill 10 is vertically arranged downwards, the bottom of the drill is conical, the drill is used for breaking soil in the drilling process, and when the diameter abrasion loss of the drill 10 is more than 10mm, the drill 10 needs to be replaced. In order to facilitate the replacement of the drill 10 after it is worn, the drill 10 and the drill rod 21 may be detachably connected by bolts, blocks, screws, etc.
In the embodiment of the invention, the two reducing stirring assemblies 20 rotate reversely at the same time during working, so that the soft soil body and the curing agent slurry in the pile forming range are fully stirred and mixed together, the drill bit 10 also needs to rotate when drilling downwards, and in order to simplify the transmission structure, the drill bit 10 is fixedly connected with the drill rod 21 below through connecting pieces such as bolts, and the drill bit 10 can rotate along with the drill rod 21. Of course, the drill bit 10 may be driven by a separate transmission structure, which is not limited in the embodiment of the present invention.
In the embodiment of the invention, the drill rods 21 of the two reducing stirring assemblies 20 are driven by the transmission assembly to rotate in opposite directions respectively, so that the stirring effect on soft soil bodies is better, and the soft soil bodies and the curing agent slurry are favorably and fully mixed. The two drill rods 21 are rotatably connected, and in order to ensure smooth rotation without clamping stagnation, a bearing and other parts for reducing rotation resistance or other lubricating structures can be arranged on a matching surface. In order to prevent soil from entering the connection between the two drill rods 21 and causing operational jamming, a protective casing may be provided on the drill rods 21 to protect the mating portion between the two drill rods 21 from the intrusion of soil.
The transmission assembly in the embodiment of the present invention is used for simultaneously driving the two drill rods 21 to rotate in opposite directions, and the transmission assembly has a plurality of possible structural forms.
For example, in one specific embodiment, the drill rods 21 have meshing teeth inside, the transmission assembly includes a gear shaft, and a motor for driving the gear shaft to rotate, wherein the meshing teeth of one drill rod 21 are in meshing transmission with the gear shaft directly, and the meshing teeth of the other drill rod 21 are in meshing transmission with the gear shaft through an intermediate gear, which is capable of changing the rotation direction of the other drill rod 21, thereby realizing synchronous reverse rotation of the two drill rods 21. Alternatively, two gear shafts are provided, the two gear shafts are respectively in mesh transmission with the corresponding drill rods 21, and the two gear shafts synchronously and reversely rotate under the driving of the motor.
In another specific embodiment, the transmission assembly includes a first rod, a speed reducer having an input end coaxially driven with the first rod, and a second rod coaxially driven with an output end of the speed reducer, wherein the first rod is driven by a motor, and the transmission direction is changed by the speed reducer, so as to realize synchronous and reverse rotation of the first rod and the second rod. The reducer may be a bevel gear reducer, a planetary gear reducer, or the like.
The stirring unit in the embodiment of the invention can change the radial stirring range of the stirring unit to adapt to different application scenes. The first stirring rod 222 and the second stirring rod 224 form a V shape, and the telescopic part 225 of the telescopic piece acts to change the radial stirring range of the stirring unit 22 by adjusting the V-shaped included angle when the telescopic part 225 of the telescopic piece acts. In order to enhance the stirring effect, the first stirring rod 222 and the second stirring rod 224 may be provided in plurality around the drill rod 21. The shape of the first stirring rod 222 and the second stirring rod 224 is not limited, and may be a rod, a plate, a paddle, or the like, or may be other shapes capable of stirring a soil body. The telescopic piece can be a hydraulic cylinder, an air cylinder, an electric telescopic rod and the like.
In a particular embodiment, as shown in fig. 6, the telescoping member is a hydraulic cylinder, the telescoping end 225 is a hydraulically actuated piston rod, and the bore of the hydraulic cylinder is mounted directly on the drill pipe 21. Or, in order to simplify the structure of the parts and facilitate the installation of the hydraulic pipeline, a piston cavity 212 in sliding fit with the piston rod is formed in the wall thickness range of the drill rod 21, the telescopic end 225 is provided with a piston in sliding fit with the inner wall of the piston cavity 212, and the oil inlet and outlet and hydraulic pipelines (an oil inlet pipeline, an oil inlet joint, a trip pipeline and the like) of the piston cavity 212 can be arranged in the inner passage 211 and are not disturbed by the invasion of soil.
When the bidirectional stirring device 1 provided by the embodiment of the invention is used, the bidirectional stirring device is arranged vertical to the ground, the drill bit 10 faces downwards to break a soft soil layer, so that the drill bit 10 and the drill rod 21 can reach the designed depth, the stirring unit 22 with the variable radial stirring range is arranged on the drill rod 21, the grouting pipe 30 is used for grouting curing agent slurry into the drill bit 10, and the transmission assembly is used for driving the drill bit 10 and the variable-diameter stirring assembly 20 to rotate. So set up, on the one hand, when the pile body of different diameters need be under construction, the stirring diameter of stirring unit 22 can be adjusted according to the construction needs, has removed the step that the spare part was demolishd and is changed from, can save engineering time, improves the efficiency of construction. On the other hand, when the same pile is constructed, the construction of variable-diameter piles (such as wedge-shaped piles, nail-shaped piles and the like) can be performed by adjusting the stirring diameter of the stirring unit 22, so that the application range is wider, and the universality is stronger.
The embodiment of the invention can be used for the construction of the equal-diameter pile body and the variable-diameter pile body. It should be noted that, as shown in fig. 9, the diameter of the tapered pile body gradually decreases from top to bottom, and the diameter of the tapered pile body near the ground is the largest, so that the tapered pile body can provide stronger supporting force, and when the volume of the pile body is the same (i.e. the amount of the curing agent slurry is the same), the tapered pile body can provide better supporting effect.
Since the inner channel 211 is provided with components such as a transmission assembly, in order to prevent the curing agent slurry from flowing back into the inner channel 211 of the drill rod 21 during grouting and affecting the normal operation of the components in the inner channel 211, referring to fig. 2 and 3, in some possible embodiments, the grouting pipe 30 includes: a tube body 31 provided in the inner passage 211; and a first packing part 32 which is arranged on the outer wall of the pipe body 31 and is in sealing fit with the inner wall of the slurry outlet channel 11, one side of the first packing part 32 facing the slurry outlet 12 forms a slurry outlet cavity, and a grouting outlet 311 which penetrates through the slurry outlet channel 11 and the inner cavity of the pipe body 31 is arranged in the region of the pipe body 31 in the slurry outlet cavity.
In this embodiment, the first packing part 32 is in sealing fit with the grout outlet 11, the grouting outlet 311 is arranged in the grout outlet chamber, and when grouting, the first packing part 32 can block the curing agent grout from entering the inner channel 211 to prevent the curing agent grout from flowing backwards. In order to ensure the sealing effect, the outer wall of the first packing part 32 may be provided with a sealing ring, a sealing gasket and other parts which are matched with the inner wall of the slurry outlet channel 11. Alternatively, the first packing part 32 may be made of a rubber material having elasticity.
Referring to fig. 2 and 3, in some possible embodiments, one end of the pipe body 31 located in the slurry outlet chamber is closed, and the grouting outlet 311 is located on the side wall of the pipe body 31; the grouting pipe 30 further comprises a second packing part 33 arranged at the closed end of the pipe body 31, the second packing part 33 is a spiral guide sheet axially arranged along the grout outlet channel 11, and the outer edge of the spiral guide sheet is attached to the inner wall of the grout outlet channel 11 to form a spiral channel for flowing out curing agent grout.
This embodiment is through setting up the second packing portion 33 towards grout outlet 12 at pipe body 31, and second packing portion 33 is the spiral, can enclose with the inner wall of grout outlet channel 11 and close and form spiral passageway, and during earth is difficult for getting into spiral passageway, can protect grout outlet 311 not blockked up. During grouting, the grout can be smoothly discharged from the grout outlet 12 along the spiral channel due to the good fluidity of the grout and the grouting pressure provided by the mortar pump during grouting.
In this embodiment, the grouting pipe 30 may be fixed relative to the drill bit or may be rotatable relative to the drill bit. When the grouting pipe 30 rotates, the driving component such as a motor drives the grouting pipe to rotate, and the spiral guide piece can convey materials towards the grout outlet 12 when rotating. So set up, not only can prevent that earth from getting into out thick liquid passageway 11, protection grout export 311 is not blockked up, can also avoid out thick liquid mouth 12 to be blockked up through rotating impurity discharges such as earth, grit that the spiral guide vane will be located out thick liquid mouth 12 department before the grout, guarantees that the grout is smooth.
In some possible embodiments, the grouting pipe 30 is rotatably disposed, driven by a driving component such as a motor, and can move within a certain axial range, so that the spiral guide piece extends out of the grout outlet 12, and the first packing part 32 is always in sealing fit with the inner wall of the grout outlet 11 during the movement. Grout pipe 30 can be followed axial displacement in this embodiment, and the transport distance of spiral guide plate obtains the extension, and the spiral guide plate can stretch out outside grout outlet 12 when moving along with grout pipe 30, guarantees that soil is by all discharge grout passageway 11.
Referring to fig. 1, 5 and 6, in some possible embodiments, the stirring unit 22 further includes: a fixing sleeve 221 fixedly connected to the drill rod 21, one end of the first stirring rods 222 being hinged to the fixing sleeve 221; and an adjusting sleeve 223 which is connected to the drill rod 21 in an axial direction of the drill rod 21 in a sliding manner and can rotate synchronously with the drill rod 21, the other ends of the plurality of second stirring rods 224 are hinged to the adjusting sleeve 223, and the telescopic part 225 is connected with the adjusting sleeve 223.
In this embodiment, the fixing sleeve 221 may be fixed to the drill rod 21 by welding, screwing, or the like, the adjusting sleeve 223 may slide along the axial direction of the drill rod 21 and may rotate synchronously with the drill rod 21, for example, a slide bar may be axially disposed on the outer wall of the drill rod 21, and the adjusting sleeve 223 has a sliding groove engaged with the slide bar. Or, a guide rod can be arranged along the axial direction of the drill rod 21, and the guide rod is matched with the adjusting sleeve 223 to play a role in limiting and guiding when the adjusting sleeve 223 slides.
The telescopic portion 225 of the telescopic member is used for driving the adjusting sleeve 223 to move along the axial direction of the drill rod 21, so as to adjust the radial stirring range of the stirring unit 22. By providing the fixing sleeve 221 and the adjusting sleeve 223, the expansion/contraction portion 225 moves the adjusting sleeve 223, and the plurality of first stirring rods 222 and the plurality of second stirring rods 224 can be adjusted at the same time.
Referring to fig. 1, 5 and 6, in some possible embodiments, the variable diameter stirring assembly 20 further includes a plurality of travel switches 23 spaced along the axial direction of the drill rod 21, and the travel switches 23 are used for detecting the position of the adjusting sleeve 223.
In this embodiment, when the adjusting sleeve 223 passes through the travel switch 23, the travel switch 23 can generate a sensing signal and transmit the sensing signal to a receiver on the ground, and the travel switch 23 can be connected with the receiver through wireless communication or a signal line penetrating through the inner channel 211. The ground operator can know the position of the adjusting sleeve 223 through the receiver, so as to judge the current stirring range of the stirring unit 22, and further judge the construction condition of the pile body. Specifically, the travel switch 23 may be a capacitive proximity switch, a magnetic induction switch, or the like.
Referring to fig. 1, 2 and 4, in some possible embodiments, the bidirectional stirring device 1 further includes an axial stirring assembly 40, and the axial stirring assembly 40 includes: the adapter body 41 is connected between the drill bit 10 and the corresponding drill rod 21 and is provided with an adapter channel 411 which penetrates through the axial direction of the adapter body and is communicated with the inner channel 211 and the slurry outlet channel 11; the spiral stirring blade 42 is coaxially sleeved outside the connecting body 41, and a sludge outlet channel is formed by arranging the inner edge of the spiral stirring blade 42 and the outer peripheral surface of the connecting body 41 at intervals; and a force transmission rod 43 connected between the coupling body 41 and the helical agitating blade 42.
The axial mixing assembly 40 may be rotated with the drill pipe 21 in this embodiment or may be driven by a separate transmission structure, and the helical mixing blades 42 may provide a thrust force to the soil or mud mixture moving in the direction of the drill bit 10 when rotated.
With the arrangement, on one hand, the spiral stirring blade 42 is arranged above the slurry outlet 12, so that slurry can be prevented from going upwards, and the slurry overflow phenomenon is reduced to a certain extent; on the other hand, when the spiral stirring blade 42 rotates, soil or slurry mixture can be axially stirred and mixed, so that the structural strength of the pile bodies at different depths tends to be consistent, and the pile forming quality is improved; on the other hand, a mud outlet channel is formed between the inner wall of the spiral stirring blade 42 and the outer wall of the connecting body 41, and part of the mud at the edge position can reach the central position, so that the soil body and the curing agent are stirred and mixed more uniformly, the phenomenon of necking after pile forming is avoided, and the overall quality of the pile body is greatly improved.
Referring to fig. 4, in some possible embodiments, the spiral agitating blade 42 is provided with a plurality of sludge discharging holes 421 penetrating through in the thickness direction.
In this embodiment, the spiral stirring blades 42 provide thrust to the soil below during rotation, and the soil at the edge position under the action of the thrust enters the mud outlet channel at the central position and is mixed with the soil at the central position and the curing agent, so that the structural strength of the part of the pile body in the same section (i.e. the same horizontal plane) after pile forming is consistent, and the phenomenon of necking is avoided; part of soil reaches the upper part of the spiral stirring blade 42 through the soil outlet hole 421, which is beneficial to uniformly stirring and mixing the soil body in the axial range and enables the structural strength of pile bodies with different depths to be consistent after pile forming.
Referring to fig. 1, 5 and 6, in some possible embodiments, the first stirring rod 222 and the second stirring rod 224 are provided with a plurality of stirring blades 226 along the length direction thereof, and the stirring blades 226 are provided on the sides of the first stirring rod 222 and the second stirring rod 224 facing away from each other. Through setting up stirring vane 226, help curing agent and earth intensive mixing, can make the stirring more even. The stirring blades 226 may be rod-shaped, plate-shaped, or other shapes that can create turbulence in the soil.
Referring to fig. 7 and 8, in a second aspect, an embodiment of the present invention provides a method for constructing a composite foundation, including the following steps:
surveying the terrain, and determining a construction area;
constructing a soil cement mixing pile 2 in a construction area by using the bidirectional mixing device 1 of any one of the above embodiments, so that a plurality of soil cement mixing piles 2 are arranged in the construction area at intervals of a preset distance;
and paving broken stone cushion layers 3 and geogrids 4 on the top of the cement soil mixing pile 2 from bottom to top alternately, wherein the broken stone cushion layers 3 have three layers, and the geogrids 4 have two layers.
As shown in figure 8, the cement mixing pile 2 in the embodiment of the invention is arranged in an equilateral triangle, the diameter of the pile is 0.5m, the curing agent is cement, the cement mixing amount is 15-25%, and the cement mixing amount is large when the water content of the soil body is high. The cement grade can adopt ordinary Portland cement of 42.5R and above. The compression strength of the core pulling test is required to be not lower than 1.2MPa after the pile is formed for 28 days. The pile bottom must enter the bearing layer by no less than 0.5 m.
As shown in fig. 7, a gravel cushion layer 3 is arranged on the top of the cement-soil mixing pile 2 according to the embodiment of the invention, the gravel cushion layer 3 has a thickness of 40cm, a maximum particle size of not more than 20mm, and a degree of tamping of not more than 0.94. The geogrid 4 adopts a polypropylene double-pull plastic grid TGSG50-50, the longitudinal and transverse tensile yield strength is more than or equal to 50.0kN/m, the longitudinal yield elongation is less than or equal to 15.0%, the transverse yield elongation is less than or equal to 13.0%, the tensile force at the longitudinal and transverse 2% elongation is more than or equal to 17.5kN/m, the tensile force at the longitudinal and transverse 5% elongation is more than or equal to 35.0kN/m, and the technical indexes strictly execute the relevant regulations of geosynthetic material plastic geogrid 4 GB/T17689 and 2008.
The geogrid 4 is fixed by U-shaped nails after being tensioned, the U-shaped nails are made of reinforcing steel bars with the diameter of 8mm, the length of each U-shaped nail is 110cm, the U-shaped nails are arranged in a square mode, and the distance between the U-shaped nails and the square nails is 2mx2 m.
According to the composite foundation construction method provided by the embodiment of the invention, the bearing capacity of the foundation can be improved and the foundation settlement can be reduced by arranging the cement mixing piles 2 below the ground of the construction area. The gravel cushion layer 3 is arranged above the cement mixing pile, the whole bearing capacity of the ground collapsible soil can be improved, and meanwhile, the gravel cushion layer 3 can also enable the whole stress of the foundation to be uniform as a buffer layer. Through establish two-layer geogrid 4 at rubble bed course 3 clamp, can provide the confining force to rubble bed course 3, reduce the removal of inside rubble, make 3 overall structure of rubble bed course stable, cement mixing pile 2, rubble bed course 3 and geogrid 4 combined action can improve the overall stability of ground, make construction quality obtain guaranteeing.
In some possible embodiments, the construction step of the soil cement mixing pile 2 includes:
positioning: determining a construction pile position, and mechanically moving a stirring pile to the designated pile position, wherein the stirring pile is provided with the bidirectional stirring device 1 of any one of the embodiments;
pre-stirring and sinking: starting a stirring pile machine to enable the bidirectional stirring device 1 to sink while stirring along the guide of the guide frame;
preparing curing agent slurry, and pouring the curing agent slurry into a hopper before grouting;
spraying, stirring and rising: after the bidirectional stirring device 1 sinks to the designed depth, the mortar pump is started to pour the curing agent slurry into the grouting pipe 30, after the curing agent slurry reaches the slurry outlet 12, the bidirectional stirring device 1 is lifted at the speed of 0.5-0.8m/min, and the bidirectional stirring device 1 is controlled to stir, spray and lift;
and (3) repeatedly stirring and sinking: controlling a stirring pile machine to enable the bidirectional stirring device 1 to sink along the guide frame while stirring, and performing repeated stirring on the cement soil stirring pile 2 with the preset depth, wherein the repeated stirring sinking speed is controlled to be 0.5-0.8 m/min;
spraying, stirring and lifting: after the bidirectional stirring device 1 sinks to the designed depth, lifting the bidirectional stirring device 1 at the speed of 0.5-0.8m/min, and controlling the bidirectional stirring device 1 to stir, spray and lift simultaneously;
and (4) finishing the shift: mechanically moving the mixing pile to the next pile position;
and repeating the steps until the construction of all the cement soil mixing piles 2 is completed.
The composite foundation construction method provided by the invention adopts a bidirectional stirring process, and the two reducing stirring assemblies 20 rotate in opposite directions simultaneously during stirring, so that the slurry is controlled between the two reducing stirring assemblies 20, the slurry cannot go up to the ground along with the drill rod 21, and the slurry overflow phenomenon is eliminated. The two reducing stirring assemblies 20 rotate in opposite directions simultaneously, so that soil and curing agent slurry are fully mixed, the curing agent can be uniformly distributed in the cement soil stirring pile 2, and the pile forming effect is good.
During construction, attention needs to be paid to the following steps:
(1) the curing agent slurry is strictly stirred according to the proportion determined by the pile-forming test, the prepared slurry cannot be isolated and placed for a long time, and the slurry exceeding 2 hours is discarded. When the slurry is poured into the hopper, a sieve is added for filtration, so that the pump body is prevented from being damaged by blocky impurities in the slurry.
(2) During the stirring and lifting of the guniting, the bidirectional stirring device 1 should be rotated, guniting and lifted at the same time, and the lifting speed is preferably controlled to be 0.5-0.8 m/min. When the bidirectional stirring device 1 is lifted to 1m away from the ground, the bidirectional stirring device is preferably lifted at a slow speed; when the pile is lifted to the position close to the ground, the lifting is stopped, and the stirring is carried out for several seconds, so that the stirring uniformity near the pile head is ensured.
(3) According to design requirements, the pile body within a certain depth range below the ground is subjected to repeated stirring, and the lifting speed and the sinking speed during repeated stirring are preferably 0.5-0.8 m/min.
(4) The changes of the parameters such as the pumping pressure, the grouting amount, the drilling speed, the lifting speed and the like are recorded at any time. And when the grouting amount is insufficient, the whole pile is required to be re-driven. When the slurry is stopped for any reason in construction, the bidirectional stirring device 1 is sunk to be 0.5m below the slurry stopping surface, and the slurry is sprayed and lifted after the slurry supply is resumed. When the machine is stopped for more than 3 hours, the slurry conveying pipeline is required to be disassembled, construction can be continued after cleaning, and the slurry is prevented from being hardened and blocking the pipeline.
(5) Before the stirring pile mechanical is shifted, proper amount of clear water is injected into the hopper to clean the slurry remained in all pipelines until the pipe body is clean, and the stirring head is cleaned and shifted.
(6) The mixing pile machine can be provided with a guniting quantity automatic recording device, and the device is periodically calibrated.
It is to be understood that, in the foregoing embodiments, various parts may be freely combined or deleted to form different combination embodiments, and details of each combination embodiment are not described herein again, and after this description, it can be considered that each combination embodiment has been described in the present specification, and can support different combination embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Two-way agitating unit, its characterized in that includes:
the drill bit is provided with a slurry outlet channel which penetrates through the axial direction of the drill bit, and one end of the slurry outlet channel forms a slurry outlet;
the two reducing stirring assemblies are sequentially connected to one side, far away from the slurry outlet, of the drill bit along the axial direction of the drill bit, each reducing stirring assembly comprises a drill rod and a stirring unit arranged on the outer wall of the drill rod, the drill rod is provided with an inner channel penetrating through the drill rod in the axial direction, and the inner channel is communicated with the slurry outlet channel;
the grouting pipe is arranged in the inner channel, and the outlet end of the grouting pipe is communicated with the grout outlet channel; and
the transmission assembly is arranged in the inner channel and used for driving the two drill rods to rotate in opposite directions respectively;
wherein the stirring unit includes:
one end of the first stirring rod is hinged to the drill rod;
the second stirring rod and the first stirring rod are arranged in the same vertical plane, and one end of the second stirring rod is hinged with the other end of the first stirring rod; and
the telescopic piece is arranged on the drill rod and is provided with a telescopic part which is axially telescopic along the drill rod and is hinged with the other end of the second stirring rod.
2. The bi-directional stirring device of claim 1, wherein the grout tube comprises:
a tube body disposed in the inner passage; and
the first packing portion is arranged on the outer wall of the pipe body and is in sealing fit with the inner wall of the slurry outlet channel, the first packing portion faces towards one side of the slurry outlet to form a slurry outlet cavity, and the pipe body is located in an area in the slurry outlet cavity and is provided with a grouting outlet which penetrates through the slurry outlet channel and the inner cavity of the pipe body.
3. The bidirectional stirring device of claim 2, wherein the tube body is closed at one end thereof located in the slurry outlet chamber, and the grouting outlet is located in a side wall of the tube body;
the grout pipe is still including locating the second of pipe body blind end seals the portion of separating, the second seals the portion of separating and is for following go out the spiral guide vane that thick liquid passageway axial set up, the outer fringe laminating of spiral guide vane in the inner wall that goes out the thick liquid passageway forms spiral channel.
4. The bi-directional stirring device of claim 1, wherein the stirring unit further comprises:
the fixing sleeve is fixedly connected to the drill rod, and one end of each of the first stirring rods is hinged to the fixing sleeve; and
the adjusting sleeve is connected to the drill rod in a sliding mode along the axial direction of the drill rod and can rotate synchronously with the drill rod, the other ends of the second stirring rods are hinged to the adjusting sleeve, and the telescopic portion is connected with the adjusting sleeve.
5. The bidirectional stirring device of claim 4, wherein the variable diameter stirring assembly further comprises a plurality of travel switches arranged at intervals along the axial direction of the drill rod, and the travel switches are used for detecting the position of the adjusting sleeve.
6. A bi-directional stirring device according to claim 1, further comprising an axial stirring assembly, said axial stirring assembly comprising:
the adapter body is connected between the drill bit and the corresponding drill rod and is provided with an adapter channel which penetrates through the axial direction of the adapter body and is communicated with the inner channel and the slurry outlet channel;
the spiral stirring blade is coaxially sleeved outside the connecting body, and the inner edge of the spiral stirring blade and the outer peripheral surface of the connecting body are arranged at intervals to form a mud outlet channel; and
and the dowel bar is connected between the connecting body and the spiral stirring blade.
7. A bidirectional stirring apparatus as set forth in claim 6 wherein the helical stirring blade is formed with a plurality of sludge discharge holes penetrating therethrough in the thickness direction.
8. The bidirectional stirring device of claim 1, wherein the first stirring rod and the second stirring rod are each provided with a plurality of stirring blades along the length direction thereof, and the stirring blades are arranged on the side of the first stirring rod and the second stirring rod which are away from each other.
9. The composite foundation construction method is characterized by comprising the following steps:
surveying the terrain, and determining a construction area;
performing construction of a soil cement mixing pile in a construction area using the bidirectional mixing apparatus as set forth in any one of claims 1 to 8, such that a plurality of soil cement mixing piles are arranged at the construction area at predetermined intervals;
and paving broken stone cushion layers and geogrids alternately on the top of the cement-soil mixing pile from bottom to top, wherein the broken stone cushion layers comprise three layers, and the geogrids comprise two layers.
10. The composite foundation construction method of claim 9, wherein the construction step of the cement mixing pile comprises:
positioning: determining a construction pile position, and mechanically moving a mixing pile to the designated pile position, wherein the mixing pile is provided with the bidirectional mixing device as claimed in any one of claims 1 to 8;
pre-stirring and sinking: starting a stirring pile machine to enable the bidirectional stirring device to sink while stirring along the guide of the guide frame;
preparing curing agent slurry, and pouring the curing agent slurry into a hopper before grouting;
spraying, stirring and rising: after the bidirectional stirring device sinks to the designed depth, the mortar pump is started to pour the curing agent slurry into the grouting pipe, after the curing agent slurry reaches the slurry outlet, the bidirectional stirring device is lifted at the speed of 0.5-0.8m/min, and the bidirectional stirring device is controlled to stir, spray and lift;
and (3) repeatedly stirring and sinking: controlling a stirring pile machine to enable a bidirectional stirring device to sink along a guide frame while stirring, and performing re-stirring on the cement-soil stirring pile with the preset depth, wherein the re-stirring sinking speed is controlled to be 0.5-0.8 m/min;
spraying, stirring and lifting: after the bidirectional stirring device sinks to the designed depth, lifting the bidirectional stirring device at the speed of 0.5-0.8m/min, and controlling the bidirectional stirring device to stir, spray and lift simultaneously;
and (4) finishing the shift: mechanically moving the mixing pile to the next pile position;
and repeating the steps until the construction of all the cement soil mixing piles is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210351400.1A CN114541361A (en) | 2022-04-02 | 2022-04-02 | Bidirectional stirring device and composite foundation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210351400.1A CN114541361A (en) | 2022-04-02 | 2022-04-02 | Bidirectional stirring device and composite foundation construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114541361A true CN114541361A (en) | 2022-05-27 |
Family
ID=81666029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210351400.1A Pending CN114541361A (en) | 2022-04-02 | 2022-04-02 | Bidirectional stirring device and composite foundation construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114541361A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203569563U (en) * | 2013-11-18 | 2014-04-30 | 高伯明 | Drilling tool of mixing pile machine |
| CN104234042A (en) * | 2014-07-24 | 2014-12-24 | 王继忠 | Concrete pile forming device and construction method thereof |
| CN104594339A (en) * | 2014-12-03 | 2015-05-06 | 王继忠 | Construction method for concrete pile |
| CN105908708A (en) * | 2015-03-30 | 2016-08-31 | 宫能和 | Stirring drilling rod, diameter-variable stirring piling machine and pile-forming construction method |
| CN106087999A (en) * | 2016-03-19 | 2016-11-09 | 王继忠 | A kind of stir constructing device and the construction method thereof spraying expanding reinforcing pile |
| CN107338792A (en) * | 2017-06-16 | 2017-11-10 | 中建市政工程有限公司 | A kind of prestressing force cement mixing method and its construction method |
| CN109882073A (en) * | 2019-03-21 | 2019-06-14 | 青岛理工大学 | The double high-pressure stirring-spraying piles of reducing and its variable diameter method |
| CN209907378U (en) * | 2019-03-26 | 2020-01-07 | 东莞嘉誉诚建设基础工程有限公司 | Cement mixing pile machine |
| CN211948385U (en) * | 2020-01-22 | 2020-11-17 | 上海渊丰地下工程技术有限公司 | Four-axis stirring pile construction equipment combining gas and slurry |
| US20200362527A1 (en) * | 2018-01-30 | 2020-11-19 | Shandong Bei Te Li Foundation Engineering Technology Co., Ltd | Jetting, expansion and extrusion combined pile, construction method thereof and spiral jetting, expansion and extrusion drilling rig used in method |
| CN112942328A (en) * | 2021-01-29 | 2021-06-11 | 福建磊鑫(集团)有限公司 | Single-shaft bidirectional stirring device and cement stirring pile construction method |
-
2022
- 2022-04-02 CN CN202210351400.1A patent/CN114541361A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203569563U (en) * | 2013-11-18 | 2014-04-30 | 高伯明 | Drilling tool of mixing pile machine |
| CN104234042A (en) * | 2014-07-24 | 2014-12-24 | 王继忠 | Concrete pile forming device and construction method thereof |
| CN104594339A (en) * | 2014-12-03 | 2015-05-06 | 王继忠 | Construction method for concrete pile |
| CN105908708A (en) * | 2015-03-30 | 2016-08-31 | 宫能和 | Stirring drilling rod, diameter-variable stirring piling machine and pile-forming construction method |
| CN106087999A (en) * | 2016-03-19 | 2016-11-09 | 王继忠 | A kind of stir constructing device and the construction method thereof spraying expanding reinforcing pile |
| CN107338792A (en) * | 2017-06-16 | 2017-11-10 | 中建市政工程有限公司 | A kind of prestressing force cement mixing method and its construction method |
| US20200362527A1 (en) * | 2018-01-30 | 2020-11-19 | Shandong Bei Te Li Foundation Engineering Technology Co., Ltd | Jetting, expansion and extrusion combined pile, construction method thereof and spiral jetting, expansion and extrusion drilling rig used in method |
| CN109882073A (en) * | 2019-03-21 | 2019-06-14 | 青岛理工大学 | The double high-pressure stirring-spraying piles of reducing and its variable diameter method |
| CN209907378U (en) * | 2019-03-26 | 2020-01-07 | 东莞嘉誉诚建设基础工程有限公司 | Cement mixing pile machine |
| CN211948385U (en) * | 2020-01-22 | 2020-11-17 | 上海渊丰地下工程技术有限公司 | Four-axis stirring pile construction equipment combining gas and slurry |
| CN112942328A (en) * | 2021-01-29 | 2021-06-11 | 福建磊鑫(集团)有限公司 | Single-shaft bidirectional stirring device and cement stirring pile construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR930012067B1 (en) | Process for compaction reinforcement grouting or for decompaction drainage and for construction of linear works and plane works in the soils | |
| CN104929114A (en) | High pressure jet grouting pile waterproof curtain construction device and method | |
| CN104846810A (en) | Self-circulating posterior grouting bored pile construction method | |
| CN106996105A (en) | Down-the-hole impacts jet mixing pile constructing process and equipment | |
| KR100762991B1 (en) | Precast piling method injected with high-strength mortar | |
| CN103603344B (en) | A kind of spiral-digging pore cast-in-place pile construction method preventing collapse hole | |
| CN112482347B (en) | Construction method of soft soil treatment reinforcing layer and soft soil treatment reinforcing layer | |
| CN201395793Y (en) | Long spiral high-pressure spraying mud injecting stirring pile-forming device | |
| CN110984221A (en) | Construction method for reinforcing end socket at initial end of air shaft and guide wall structure | |
| CN100386483C (en) | High-performance cement soil continuous wall construction method | |
| CN108755729B (en) | CFG pile foundation pile cap and pile body integrated construction device and method | |
| CN114320169A (en) | Short auger bit of mixing pile and combined drilling tool with short auger bit | |
| CN111335297A (en) | Steel pipe pile structure | |
| CN109083591B (en) | Drilling bored concrete pile body and pile cap integrated drilling pore-forming method | |
| CN214783811U (en) | Grouting support and grouting system | |
| CN1029518C (en) | Super fluidized concrete, the method and drilling machine for pile forming using such concret | |
| CN211898541U (en) | Guide wall structure for reinforced structure of air shaft initial end head | |
| CN201021495Y (en) | Vibration machine for plasm injection construction of sand earth foundation | |
| CN117071611A (en) | Seepage-proofing system of earth-rock dam cofferdam and construction method thereof | |
| CN202787246U (en) | Flexible pile and drainage body integral combination pile | |
| CN114541361A (en) | Bidirectional stirring device and composite foundation construction method | |
| CN113309128B (en) | Construction method of dumbbell-shaped cement soil curtain pile in peat soil stratum | |
| CN114658367A (en) | Push-type self-wall-protecting bored pile spiral drill bit and drilling method | |
| CN112411526A (en) | Mortar consolidation construction method for rotary drilling collapse hole in high backfill region | |
| CN113529725A (en) | Construction system and method for breaking rock cement soil pile by high-pressure water jet in hard soil layer foundation |
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 |