CN210737525U - Powder-spraying spiral soil-squeezing pile-forming drilling tool device - Google Patents
Powder-spraying spiral soil-squeezing pile-forming drilling tool device Download PDFInfo
- Publication number
- CN210737525U CN210737525U CN201921537659.5U CN201921537659U CN210737525U CN 210737525 U CN210737525 U CN 210737525U CN 201921537659 U CN201921537659 U CN 201921537659U CN 210737525 U CN210737525 U CN 210737525U
- Authority
- CN
- China
- Prior art keywords
- drilling tool
- powder
- soil
- pile
- spiral
- 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.)
- Active
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model provides a crowded native drilling tool device of spiral is spouted to powder, belongs to building pile foundation construction technical field, the crowded native drilling tool of spiral runs through the inner chamber in the center tube of powder spout drilling tool, powder spouts drilling tool bottom for spiral helicine drill bit blade, powder spouts the pipeline and sets up in the lateral wall of center tube, drill bit blade bottom is equipped with cutting teeth I, center tube bottom edge is equipped with cutting teeth II, the crowded native drilling tool of spiral spouts the drilling tool with powder and is connected the unit head respectively. Aiming at soft soil layers with higher water content such as saturated clay and the like, a drilling tool device for powder-sprayed pile surrounding soil and spiral soil-squeezing pore-forming pump pressure-filling concrete to form a pile and a foundation pile construction method are provided, one construction pile machine is adopted to form the pile at one time, the construction efficiency is high, the pile bearing capacity is strong, and the cost is low.
Description
Technical Field
The invention belongs to the technical field of building pile foundation construction, and particularly relates to a powder-blasting spiral soil-squeezing pile-forming drilling tool device.
Background
In the construction of a building pile foundation, a precast tubular pile is usually adopted as a pile foundation in a soft soil layer with higher water content, such as saturated clay, and the like, and during application, phenomena of floating piles, oblique piles, short piles and the like often occur, and a phenomenon of insufficient strength of an interface between piles in a long pile also occurs, so that the stability of a building is seriously influenced. Aiming at the geological conditions, a drilling tool device and a foundation pile construction method for the soil surrounding the cast-in-place extruded concrete pressure filling pile and the powder spraying pile are provided, one construction pile machine is adopted for forming the pile at one time, the construction efficiency is high, the pile bearing capacity is strong, and the cost is low.
Disclosure of Invention
In order to solve the technical problems, the invention provides a powder-spraying spiral soil-squeezing pile-forming drilling tool device and a foundation pile construction method thereof.
The invention adopts the following technical scheme:
a powder spraying spiral soil squeezing pile forming drilling tool device comprises a spiral soil squeezing drilling tool and a powder spraying drilling tool, wherein the spiral soil squeezing drilling tool comprises a spiral soil squeezing drill bit and a drill rod, a concrete pouring channel is arranged in the drilling tool, a drill tip capable of being unscrewed is arranged at the bottom end of the spiral soil squeezing drilling tool, an opening and closing linkage device is arranged on the drill tip, a concrete pouring channel blocking plate is arranged on the opening and closing linkage device, the spiral soil squeezing drilling tool penetrates through an inner cavity of a central pipe of the powder spraying drilling tool, the powder spraying drilling tool comprises drill blades, a central pipe, drilling tool blades and a powder spraying pipeline, the bottom end of the powder spraying drilling tool is a flat opening, spiral drilling tool blades are arranged on the outer wall of the central pipe, the bottom of the powder spraying drilling tool is provided with spiral drilling tool blades, the powder spraying pipeline is arranged on the outer wall of the central pipe, the bottom end of the powder spraying pipeline is communicated with a, the bottom end of the central pipe is provided with a cutting tooth II, the top end of the powder spraying drilling tool is provided with a rib plate and a flange, and the spiral soil squeezing drilling tool and the powder spraying drilling tool are respectively connected with a power head.
Further, the outer surface of the bottom end of the central tube is provided with or not provided with a soil squeezing block.
Furthermore, the distance H between the bottom end of the cutting tooth I on the drill blade and the plane of the bottom end of the central tube is 150-300 mm; the outer diameter D of the spiral soil-squeezing drilling tool and the central drift diameter D of the powder-jetting drilling tool are 20-50 mm.
The invention has the advantages and effects that:
(1) the reinforcing powder such as cement powder or quicklime powder sprayed by soft soil such as sludge, saturated clay and loam around the pile is used for reinforcing, and the reinforcing powder and the soil around the pile after powder spraying are subjected to physical and chemical reaction, so that the strength of the soil around the pile is improved, and the bearing capacity of the pile is improved.
(2) The spiral soil-squeezing drilling tool has the functions of squeezing soil and transferring soil. Particularly, the soil-squeezing drill bit fully squeezes the soil around the pile, the bearing capacity of the pile is improved to a certain extent, and meanwhile, concrete is used as filler to strengthen the soil layer at the bottom end part of the squeezed pile, so that the bearing capacity of the pile is further improved.
(3) For soil extrusion drilling in a soil layer in a flow plastic state, a powder jet drilling tool is adopted to drill a central pipe in advance, soil in the flow plastic state in a pile hole is cut into an inner cavity of the central pipe, and then the soil in the flow plastic state in the central pipe is transmitted from bottom to top by a spiral soil extrusion drilling tool which is rotationally drilled, so that the adverse effect of the soil in the flow plastic state in the extruded pile hole on the soil which is subjected to powder jet reinforcement is avoided.
(4) The powder-spraying drilling tool has the advantages that the inner cavity of the central pipe of the powder-spraying drilling tool is used as a guide pipe for concrete pressure filling, so that the surrounding soil of the pile is prevented from falling into the pile body, and the pile forming quality is guaranteed.
(5) According to the requirement, the bottom end part of the outer surface of the central pipe of the powder jet drilling tool can be provided with an earth-squeezing block, and the earth-squeezing block can be pressed and poured into a pile shape with irregular spiral protrusions on the outer surface, so that the bearing capacity of the pile can be improved.
(6) The two construction methods of the spiral soil-squeezing pore-forming pump pressure grouting pile forming and the powder spraying reinforcing pile surrounding soil are simultaneously realized by one pile machine, the construction efficiency is high, and the cost is low.
Drawings
FIG. 1: a construction state schematic diagram of the pile-forming drilling tool;
FIG. 2: the structure of the spiral soil-squeezing drill is shown schematically;
FIG. 3: a schematic structural diagram of a powder jet drilling tool;
FIG. 4: the powder jet drilling tool partially enlarges the structure;
FIG. 5: a bottom end section view of the powder jet drilling tool;
FIG. 6: the bottom end part is compacted by cones, the soil around the rest piles is reinforced by powder spraying, and the surface of the pile is provided with a schematic diagram of a spiral boss;
FIG. 7: the cone at the bottom end is compacted, the soil around the rest part of the pile is reinforced by powder spraying, and the other pile is schematically shown with a spiral boss on the surface;
FIG. 8: the bottom end part is compacted by cones, the soil around the rest piles is reinforced by powder spraying, and the surface of the pile is not provided with a schematic diagram of a spiral boss;
FIG. 9: the cone at the bottom end is compacted, the soil surrounding the rest part of the pile is reinforced by powder spraying, and the surface of the other pile is not provided with a schematic diagram of a spiral boss;
FIG. 10: the bottom end is strengthened and compacted, the soil around the rest piles is reinforced by powder spraying, and the surface of the pile is provided with a schematic diagram of a spiral boss;
FIG. 11: the bottom end is strengthened and compacted, the soil around the rest part of the pile is reinforced by powder spraying, and the surface of the other pile is provided with another pile schematic diagram of a spiral boss;
FIG. 12: the other pile schematic diagram is that the soil around the pile is reinforced by powder spraying, the bottom end is reinforced and compacted, and the surface is provided with a spiral boss;
FIG. 13: the bottom end is strengthened and compacted, the soil around the rest piles is reinforced by powder spraying, and the surface is not provided with a spiral boss;
FIG. 14: the bottom end is strengthened and compacted, the soil around the rest part of the pile is reinforced by powder spraying, and the surface of the pile is not provided with another pile schematic diagram of a spiral boss;
FIG. 15: the soil around the pile is subjected to powder spraying and reinforcement, the bottom end is strengthened and compacted, and the surface of the other pile is not provided with a spiral boss;
FIG. 16: the cross section of the pile body with the spiral boss on the surface is schematic;
FIG. 17: the pile body surface has a partial enlarged view of a boss.
The components in the figure: the device comprises a lower power head 1, an upper power head 2, an unearthing device 3, a drill point opening and closing controller 4, a concrete pile 5, a powder spraying reinforcing area 6, a boss 7, a spiral earth extrusion drilling tool 10, a powder spraying drilling tool 20, a powder spraying converter 30, a spiral earth extrusion drilling bit 11, a drill point 11-1 capable of being unscrewed, an opening control device 11-2, a drill rod 12, a drill blade 21, a cutting tooth I21-1, a cutting tooth II 22-2, a central pipe 22, a drilling tool blade 23, a powder spraying pipeline 24-1, a powder spraying nozzle 24-1, a rib plate 25, a flange 26 and an earth extrusion block 27.
Detailed Description
The invention is further explained below with reference to the figures and the examples.
1. The structure is as follows:
the drilling tool device is composed of a spiral soil-extruding drilling tool 10, a powder-jetting drilling tool 20 and the like, as shown in fig. 1-4. The spiral soil-squeezing drilling tool 10 is composed of a spiral soil-squeezing drill bit 11, a drill rod 12 and the like, and a concrete pouring channel is arranged in the drilling tool. The spiral earth-squeezing drill bit 11 and the bottom core tube are cone-shaped, an opening and closing linkage device 11-2 is arranged on a drill tip 11-1 which can be unscrewed, a concrete conveying channel blocking plate is arranged, and the drill rod 12 can be assembled by a plurality of short drill rods through joints. It is prior art here, see patent application No.: 201910554735.1.
the spiral soil-squeezing drilling tool 10 penetrates through the inner cavity of the central pipe 22 of the powder-jetting drilling tool 20. The powder spraying drilling tool 20 comprises a drill bit blade 21, a central pipe 22, a drilling tool blade 23, a powder spraying pipeline 24, a rib plate 25, a flange 26 and the like. The bottom end of the powder spraying drilling tool 20 is not provided with a drill bit, the bottom of the powder spraying drilling tool 20 is a flat opening, and a powder spraying pipeline 24 is arranged outside the central pipe 22. The powder spraying pipe 24 is arranged on one side of the outer side wall of the central pipe 22 and is as long as the central pipe. The bottom end part of the drill blade 21 is provided with a spiral cutting tooth I21-1, a powder nozzle 24-1 is arranged below the drill blade 21, the bottom of the powder spraying pipeline 24 is provided with a branch at the last drill blade 21, and two sides of the drill blade 21 at the bottom are respectively provided with the powder nozzle 24-1. The bottom of the drill bit blade 21 is provided with a row of cutting teeth I21-1 on two sides of the central tube 22 respectively, and the cutting teeth I21-1 on two sides are symmetrically arranged. The outer side of the central tube 22 is uniformly provided with a single spiral drilling tool blade 23, the top of the central tube is provided with a flange 26, and the bottom of the flange 26 is provided with a rib plate 25.
The lower end of the central tube 22 is provided with a cutting tooth II 22-1; the distance H between the cutting teeth I21-1 at the bottom end of the drill blade 21 and the plane of the bottom end of the central tube 22 is 150-300 mm. An earth-squeezing block 27 may be provided on the outer surface of the bottom end of the center tube 22. The part with the drill blades 23 may consist of several segments connected by flanges. The outer diameter D of the spiral soil-squeezing drilling tool 10 and the central drift diameter D of the powder-blasting drilling tool 20 are 20-50 mm.
2. The working principle is as follows:
as shown in fig. 1, a matched drilling tool is selected according to the maximum depth of the powder-sprayed reinforced soil and the pile length of the pump-pressure concrete-poured pile by using a double-power-head pile machine device. The powder spraying drilling tool 20 is connected with a lower power head through a powder spraying converter 30, and a soil discharging device is arranged on the lower power head; the spiral soil-squeezing drilling tool 10 penetrates through a center hole of a main shaft of the lower power head and a center pipe of the powder-jetting drilling tool 20, the top end of the spiral soil-squeezing drilling tool is connected with the upper power head, and a drill tip opening and closing controller is arranged on the upper power head. Two power heads working independently move up and down on the same pile frame main tower guide rail through respective windlasses.
In the pile length range, the soil at the pile end part does not need to be subjected to powder spraying reinforcement, other constructions of the pile which needs powder spraying reinforcement and does not strengthen and compact the pile bottom are subjected to powder spraying reinforcement, a soft soil layer which needs reinforcement is firstly subjected to powder spraying until the design requirement of powder spraying reinforcement is met, and a powder spraying drilling tool is lifted to the ground surface. And then starting the upper power head to drive the spiral soil-squeezing drilling tool to perform downward soil-squeezing drilling, and after the spiral soil-squeezing drilling tool completely enters the soil, starting the lower power head to drive the powder-spraying drilling tool to drill downward and supply air at the reinforcing section needing powder spraying until the depth of the reinforcing design is increased. In the drilling process, in a non-flow plastic state soil layer, the spiral soil-squeezing drill bit always works outside the bottom end of the central pipe of the powder jet drilling tool; in the soil layer in the plastic flowing state, the powder jet drilling tool drills in advance, the soil extrusion drill bit drills in a central pipe of the powder jet drilling tool, and the soil in the plastic flowing state is transmitted from bottom to top by utilizing the spiral soil extrusion blades on the rotary spiral soil extrusion drilling tool. And (4) continuing rotating in the same direction for a plurality of minutes in situ until the design depth of the pile bottom is marked, and fully compacting the pile hole. The method comprises the steps of firstly starting a concrete delivery pump to pour concrete into the inner cavity of the spiral soil-squeezing drilling tool in a pressure mode, then slowly lifting the rotary spiral soil-squeezing drilling tool, simultaneously opening a drill point until the upper interface of the pile concrete in a pile hole is higher than the plane of the bottom end of a central pipe of the powder spraying drilling tool, then starting the powder spraying drilling tool to rotate reversely, lifting the powder spraying drilling tool and spraying powder. In the whole lifting process, the pile forming pressure filling amount of the pump is kept to be matched with the speed of the lifting spiral soil squeezing drilling tool, the upper interface of the pile forming concrete is higher than the bottom plane of the central pipe of the powder spraying drilling tool in the range from the pile top elevation to the maximum powder spraying depth until the pile top design elevation, and the powder is sprayed to the soft soil layer reinforcing top elevation. As shown in fig. 6, 7, 8, 9.
In the pile length range, the soil at the pile end part does not need to be subjected to powder spraying reinforcement, other piles which need to be subjected to powder spraying reinforcement and are reinforced and compacted at the pile bottom are constructed, the soft soil layer which needs to be reinforced is firstly subjected to powder spraying reinforcement until the design requirement of powder spraying reinforcement is met, and a powder spraying drilling tool is lifted to the ground surface. And then starting the upper power head to drive the spiral soil-squeezing drilling tool to perform downward soil-squeezing drilling, and after the spiral soil-squeezing drilling tool completely enters the soil, starting the lower power head to drive the powder-spraying drilling tool to drill downward and supply air at the reinforcing section needing powder spraying until the depth of the reinforcing design is increased. In the drilling process, in a non-flow plastic state soil layer, the spiral soil-squeezing drill bit always works outside the bottom end of the central pipe of the powder jet drilling tool; in the soil layer in the plastic flowing state, the powder jet drilling tool drills in advance, the soil extrusion drill bit drills in a central pipe of the powder jet drilling tool, and the soil in the plastic flowing state is transmitted from bottom to top by utilizing the spiral soil extrusion blades on the rotary spiral soil extrusion drilling tool. And (4) continuing rotating in the same direction for a plurality of minutes in situ until the design depth of the pile bottom is marked, and fully compacting the pile hole. And pouring a certain amount of concrete (strengthening compaction amount) into the spiral soil-squeezing drilling tool through a concrete conveying pump, then slowly lifting the rotary spiral soil-squeezing drilling tool, simultaneously opening the drill point, stopping lifting the drill after the concrete in the drilling tool is completely injected into the pile hole, closing the drill point, and keeping the upper interface of the concrete in the pile hole lower than the bottom plane of the central pipe of the powder-blasting drilling tool. And releasing the rotary spiral soil-extruding drilling tool downwards, drilling the extruded concrete by the soil-extruding drill bit until the designed depth of the pile bottom is reached, and continuously rotating in situ for several minutes to fully extrude the pile hole. And then starting a concrete delivery pump to pour concrete into the inner cavity of the spiral soil-squeezing drilling tool in a pressure mode, then slowly lifting the rotary spiral soil-squeezing drilling tool, simultaneously opening the drill point until the upper interface of the pile concrete in the pile hole is higher than the plane of the bottom end of the central pipe of the powder spraying drilling tool, then starting the powder spraying drilling tool to rotate reversely, lifting the powder spraying drilling tool and spraying powder. In the whole lifting process, the pile-forming pressure filling amount of the pump is kept to be matched with the speed of the lifting spiral soil-squeezing drilling tool, the upper interface of the concrete of the pile is higher than the bottom plane of the central pipe of the powder-jetting drilling tool in the range from the elevation of the pile top to the maximum depth of powder jetting until the design elevation of the pile top, and the powder is jetted to the reinforcement elevation of the soft soil layer. As shown in fig. 10, 11, 13, 14.
For the construction of the pile which needs powder spraying reinforcement in the pile length range and strengthens and compacts the bottom of the pile, firstly, a power head below is started to drill and supply air, and a reverse drilling tool is lifted and sprayed with powder; drilling and blowing air, lifting a reverse drilling tool and spraying powder; and lifting the powder spraying drilling tool to the ground surface until the design requirement of powder spraying reinforcement is met. And starting the upper power head to release downwards to drive the rotary spiral earth-squeezing drilling tool with the drill point in a closed state to carry out earth-squeezing drilling, and starting the lower power head after the earth-squeezing drilling head is completely drilled into the earth to drive the powder-spraying drilling tool to drill downwards and supply air. In the drilling process, in a non-flow plastic state soil layer, the soil-squeezing drill bit squeezes soil below the bottom end of the central tube of the powder jet drilling tool to drill; in the soil layer in the plastic flowing state, the powder jet drilling tool drills in advance, the soil extrusion drill bit drills in a central pipe of the powder jet drilling tool, and the soil in the plastic flowing state is transmitted from bottom to top by utilizing the spiral soil extrusion blades on the rotary spiral soil extrusion drilling tool. And compacting the soil around the pulverized and sprayed pile by a soil-compacting drill bit within the pile length range until the designed pile hole depth, and continuously rotating in situ for several minutes to fully compact the pile hole. At the moment, the follow-up depth of the powder jet drilling tools is controlled, and a certain distance is kept between the bottom ends of the two drilling tools. And pouring a certain amount (strengthening compaction amount) of concrete into the inner cavity of the spiral extrusion drilling tool through a concrete delivery pump, a pipeline and a central shaft hole of the power head above the concrete delivery pump, lifting the spiral extrusion drilling tool which continuously rotates in the same direction, opening a drill point at the same time, pouring the concrete into the bottom of the pile hole, and stopping lifting the drill after the concrete is completely poured into the pile hole. And at the moment, ensuring that the upper interface of concrete in the pile hole is lower than the bottom end plane of the central pipe of the powder spraying drilling tool, closing the drill point, releasing the spiral soil extrusion drilling tool which continuously rotates in the same direction to move downwards, starting the soil extrusion drilling head to perform drilling for extruding concrete to pressurize and compact the side wall and the bottom end of the pile hole until the design depth of the pile hole is marked, and continuously rotating in situ for a few minutes to fully compact the pile hole. And then, the concrete delivery pump is started to press and pour concrete into the inner cavity of the spiral soil-squeezing drilling tool, then the rotary spiral soil-squeezing drilling tool is slowly lifted, the pile tip is opened, the upper interface of the pile forming pressure concrete in the pile hole is lifted to be higher than the bottom end face of the central tube of the powder spraying drilling tool, the power head below is started to rotate reversely, the powder spraying equipment is opened, and the powder spraying drilling tool is lifted to spray powder. In the process of lifting the drill, the pile-forming pouring amount of the pump is kept to be matched with the speed of lifting the spiral soil-squeezing drilling tool, and the upper interface of the concrete of the pile is kept to be always higher than the bottom end plane of the central pipe of the powder spraying drilling tool until the pump pressure pouring and the powder spraying reach the designed top elevation. As shown in fig. 12 and 15.
3. The foundation pile construction method comprises the following steps:
(1) leveling a construction site, determining the position of a pile point according to design requirements, and marking;
(2) connecting the assembled construction pile machine, the pump pressure concrete pouring device, the powder spraying device, the corresponding matched drilling tool device and the like in place, wherein the drill point of the drilling tool is aligned with a pile point;
(3) and starting the lower power head to drive the powder jet drilling tool to drill in a rotating manner, in the powder jet reinforcing section, supplying air into disturbed soil by the air compressor through the pipeline and the powder jet nozzle in the powder jet drilling tool until the design depth of the powder jet is reached, and stopping the rotation and air supply of the lower power head. And starting the power head below to drive the powder jet drilling tool to rotate reversely, starting the powder jet device, jetting reinforcing powder such as cement powder or quicklime powder through a pipeline and a powder jet nozzle at the bottom end of the powder jet drilling tool, slowly lifting the powder jet drilling tool, spraying powder while lifting until a soil layer reinforcing mark top is designed, and stopping the rotation, lifting and powder spraying of the powder jet drilling tool. And repeating the operation process, wherein the powder spraying drilling tool forwards rotates to drill and blow air, reversely rotates to lift and spray powder, and powder spraying of the soft soil layer to be reinforced is carried out according to the design requirement until the design requirement of powder spraying reinforcement is met. Lifting the powder jet drilling tool to the ground surface, and stopping the rotation of the power head below the powder jet drilling tool;
(4a) and starting the upper power head to drive the spiral soil-squeezing drilling tool with the drill tip in a closed state to squeeze soil downwards for drilling, starting the lower power head to drive the powder-spraying drilling tool to perform rotary drilling after the soil-squeezing drilling head is completely drilled into the soil, and supplying air by an air compressor at a powder-spraying reinforcing section. In the process of keeping drilling down, in a non-flow plastic state soil layer, the soil squeezing drill head squeezes soil below the bottom end of the central pipe of the powder jet drilling tool; in the soil layer in the plastic flowing state, the powder jet drilling tool drills in advance, the spiral soil extrusion drill bit drills in the central pipe of the powder jet drilling tool, and the soil in the plastic flowing state in the central pipe is transmitted from bottom to top. And stopping drilling down until the depth of the pile bottom and the powder spraying design is marked, stopping the rotation and air supply of the powder spraying drilling tool, and continuing to rotate the soil extrusion drilling head in the same direction for 2-8 minutes in situ. The method comprises the steps of firstly starting a concrete delivery pump to press and pour concrete into the inner cavity of the spiral soil-squeezing drilling tool, then slowly lifting the drilling tool, simultaneously opening a drill point, starting the powder-spraying drilling tool to rotate reversely after the upper interface of the pile-forming concrete in a pile hole reaches a position above the plane of the bottom end of a central pipe of the powder-spraying drilling tool, simultaneously opening a powder spraying device, spraying reinforcing powder such as cement powder or quicklime into soil through a powder nozzle, and slowly lifting. In the process of lifting the drill, the pile-forming pouring amount of the pump is kept to be matched with the speed of lifting the spiral soil-squeezing drilling tool, the pile-forming concrete upper interface is kept to be higher than the bottom plane of the central pipe of the powder-jetting drilling tool from the deepest part of powder-jetting reinforcement to the designed elevation of the pile top. Stopping pumping pressure filling and powder spraying until the designed elevation of the pile top and the designed elevation of the powder spraying reinforcement top, lifting the two drilling tools to the ground surface, stopping rotating and lifting, closing the drill point, and completing powder spraying reinforcement of the periphery of a part of the pile within the length range of the pile and filling of the pile by squeezing soil, as shown in figures 6, 7, 8, 9, 16 and 17;
(4b) and starting the upper power head to drive the spiral soil-squeezing drilling tool with the drill tip in a closed state to squeeze soil downwards for drilling, starting the lower power head to drive the powder-spraying drilling tool to perform rotary drilling after the soil-squeezing drilling head is completely drilled into the soil, and supplying air by an air compressor at a powder-spraying reinforcing section. In the process of keeping drilling down, in a soil layer in a non-flowing plastic state, the soil squeezing drill bit squeezes soil below the bottom end of the central tube of the powder spraying drilling tool, in the soil layer in a flowing plastic state, the powder spraying drilling tool drills in advance, the spiral soil squeezing drill bit drills in the central tube of the powder spraying drilling tool, and the soil in a flowing plastic state in the central tube is transmitted from bottom to top. And stopping drilling down until the depth of the pile bottom and the powder spraying design is marked, stopping the rotation and air supply of the powder spraying drilling tool, and continuing to rotate the soil extrusion drilling head in the same direction for 2-8 minutes in situ. Firstly, a certain amount (strengthening compaction amount) of concrete is injected into the inner cavity of the spiral soil-extruding drilling tool through a concrete delivery pump, then the spiral soil-extruding drilling tool is slowly lifted, the drill point is opened, when the concrete in the inner cavity of the drilling tool is completely injected into the pile hole, the drill lifting is stopped, the drill point is closed, and the upper interface of the concrete in the pile hole (strengthening compaction amount) is not higher than the plane of the bottom end of the central pipe of the powder-blasting drilling tool. And releasing the spiral soil-extruding drill bit which continuously rotates in the same direction to drill the extruded concrete until the designed depth of the pile bottom is reached, and continuously rotating the drilling tool in situ for 2-5 minutes. The concrete conveying pump is started again firstly to press and pour concrete into the inner cavity of the spiral soil-squeezing drilling tool, then the drilling tool is lifted slowly, the drill point is opened simultaneously, after the upper interface of the pile-forming concrete in the pile hole reaches the position above the bottom end plane of the central pipe of the powder spraying drilling tool, the powder spraying drilling tool is started to rotate reversely, the powder spraying device is opened simultaneously, and reinforcing powder such as cement powder or quicklime is sprayed into the soil through the powder nozzle and is lifted slowly. In the process of lifting the drill, the pile-forming pouring amount of the pump is kept to be matched with the speed of lifting the spiral soil-squeezing drilling tool, the pile-forming concrete upper interface is kept to be higher than the bottom plane of the central pipe of the powder-jetting drilling tool from the deepest part of powder-jetting reinforcement to the designed elevation of the pile top. Stopping pumping pressure filling and powder spraying until the designed elevation of the pile top and the designed elevation of the powder spraying reinforcement top, lifting the two drilling tools to the ground surface, stopping rotating and lifting, closing the drill point, and completing the powder spraying reinforcement of the periphery of a part of the pile in the pile length range and the filling of the pile bottom reinforced compaction pile, as shown in figures 10, 11, 13, 14, 16 and 17;
(4c) and starting the upper power head to drive the spiral soil-squeezing drilling tool with the drill tip in a closed state to squeeze soil downwards for drilling, starting the lower power head to drive the powder-spraying drilling tool to perform rotary drilling after the soil-squeezing drilling heads are all drilled into the soil, and supplying air by an air compressor. In the drilling process, in a non-flowing plastic soil layer, the soil squeezing drill bit squeezes soil below the bottom end of the central tube of the powder jet drilling tool; in the plastic-flowing state soil layer, the powder jet drilling tool firstly drills, the soil extrusion drill bit drills in the central pipe of the powder jet drilling tool, and the plastic-flowing state soil in the central pipe is transmitted from bottom to top. And stopping drilling until the designed depth of the pile bottom is marked, and continuing rotating in the same direction for 3-10 minutes in situ. The method comprises the steps of firstly starting a concrete delivery pump to pour a certain amount of concrete (strengthening compaction amount) into an inner cavity of the spiral soil-squeezing drilling tool, then slowly lifting the spiral soil-squeezing drilling tool, simultaneously opening a drill point, stopping lifting the drill when the concrete in the drilling tool is completely poured into a pile hole, and closing the drill point. And the powder jet drilling tool drills to the bottom end of the central pipe of the powder jet drilling tool not lower than the upper interface of the concrete with the reinforced compaction amount poured into the pile hole, and stops rotating, drilling down and air supplying. And releasing the spiral soil-extruding drill bit which continuously rotates in the same direction to drill the extruded concrete until the designed depth of the pile bottom is reached, and continuously rotating the drilling tool in situ for 2-5 minutes. The method comprises the steps of firstly restarting a concrete delivery pump to press-pour concrete into the inner cavity of the spiral soil-squeezing drilling tool, then slowly lifting the rotary spiral soil-squeezing drilling tool, simultaneously opening a drill point, starting the powder-spraying drilling tool to rotate reversely after the upper interface of the formed pile concrete in a pile hole reaches a position above the bottom end plane of a central pipe of the powder-spraying drilling tool, simultaneously starting a powder-spraying device, spraying reinforcing powder such as cement powder or quicklime powder into the soil through a powder nozzle on the powder-spraying drilling tool, and slowly lifting. In the lifting process, the pile-forming pouring amount of the pump is kept to be matched with the speed of lifting the spiral soil-squeezing drilling tool, and the upper interface of the concrete of the pile is kept to be higher than the bottom end plane of the central pipe of the powder-jetting drilling tool. Stopping pumping and powder spraying until the designed elevation of the pile top and the designed elevation of the powder spraying reinforced roof, lifting the ground surface by two drilling tools, stopping rotating and lifting, closing the drill point, and completing the powder spraying reinforcement of the pile surrounding soil and the pouring of the pile bottom reinforced compaction pile within the pile length range at one time, as shown in figures 12, 15, 16 and 17;
(5) according to the design requirements, the reinforcement cage or the prefabricated member is placed into the poured pile hole to complete a pile.
Claims (3)
1. The utility model provides a crowded soil of whitewash spiral becomes stake drilling tool device, the device includes crowded soil drilling tool of spiral (10), whitewash drilling tool (20), crowded soil drilling tool of spiral (10) are equipped with the concrete pouring channel including crowded soil drill bit of spiral (11) and drilling rod (12) in the drilling tool, and crowded soil drill bit of spiral (11) bottom is equipped with drill point (11-1) that can unscrew, is equipped with on it and opens and close aggregate unit (11-2) to be equipped with concrete pouring channel closure plate, its characterized in that: the spiral soil-squeezing drilling tool (10) penetrates through an inner cavity of a central pipe (22) of a powder-jetting drilling tool (20), the powder-jetting drilling tool (20) comprises drill bit blades (21), the central pipe (22), drilling tool blades (23) and a powder-jetting pipeline (24), the bottom end of the powder-jetting drilling tool (20) is a flat opening, spiral drilling tool blades (23) are arranged on the outer wall of the central pipe (22), the bottom of the powder-jetting drilling tool (20) is a spiral drilling tool blade (21), the powder-jetting pipeline (24) is arranged on the outer wall of the central pipe (22), the bottom end of the powder-jetting pipeline (24) is communicated with a powder nozzle (24-1) arranged below the drilling tool blades (21), cutting teeth I (21-1) are arranged at the bottom end of the drilling tool blades (21), cutting teeth II (22-2) are arranged at the bottom end of the central pipe (22), a rib plate (25) and a flange (26, the spiral soil-squeezing drilling tool (10) and the powder-jetting drilling tool (20) are respectively connected with a power head.
2. The powder-blasting spiral soil-squeezing pile-forming drilling tool device as claimed in claim 1, wherein: the outer surface of the bottom end of the central pipe (22) is provided with or not provided with a soil squeezing block (27).
3. The powder-blasting spiral soil-squeezing pile-forming drilling tool device as claimed in claim 1, wherein: the distance H between the bottom end of a cutting tooth I (21-1) on the drill blade (21) and the bottom end plane of the central tube (22) is 150-300 mm; the outer diameter D of the spiral soil-squeezing drilling tool (10) and the central drift diameter D of the powder-jetting drilling tool (20) are 20-50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921537659.5U CN210737525U (en) | 2019-09-17 | 2019-09-17 | Powder-spraying spiral soil-squeezing pile-forming drilling tool device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921537659.5U CN210737525U (en) | 2019-09-17 | 2019-09-17 | Powder-spraying spiral soil-squeezing pile-forming drilling tool device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210737525U true CN210737525U (en) | 2020-06-12 |
Family
ID=70985617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921537659.5U Active CN210737525U (en) | 2019-09-17 | 2019-09-17 | Powder-spraying spiral soil-squeezing pile-forming drilling tool device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210737525U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818429A (en) * | 2021-11-09 | 2021-12-21 | 樊军让 | Construction device for changing soil outside pile and construction method thereof |
-
2019
- 2019-09-17 CN CN201921537659.5U patent/CN210737525U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818429A (en) * | 2021-11-09 | 2021-12-21 | 樊军让 | Construction device for changing soil outside pile and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101260669B (en) | Drilling, spraying, injection integral enlarging anchor rod construction method | |
| CN103806840A (en) | One-way spiral half soil compaction drill bit and one-way spiral half soil compaction pile construction technology | |
| CN104295234B (en) | End stake machine and pile foundation perfusion pile making method are rammed in long spire extruding | |
| CN102943468A (en) | Multi-axial mixing pile device capable of reducing soil extrusion and application thereof | |
| CN106192996B (en) | A kind of T shape drilling tools of construction method and T shapes the cast pile driving construction of T shapes stake | |
| CN203256735U (en) | Multi-shaft mixing pile device capable of reducing soil-squeezing effect | |
| CN206873444U (en) | A kind of spiral sprinkling irrigation extruding combination unit | |
| CN210737525U (en) | Powder-spraying spiral soil-squeezing pile-forming drilling tool device | |
| CN113846632B (en) | Construction method of soil squeezing pile for reinforcing part bearing layer | |
| CN106481277A (en) | High pressure base expanding and base expanding screw rod drilling equipment and its stake end enlarged footing | |
| CN110512599B (en) | Powder spraying spiral soil-squeezing pile-forming drilling tool device and foundation pile construction method thereof | |
| CN104846820B (en) | Hold type screw-type Squeezing Soil Pile pile-forming equipment and bore forming method in a kind of end | |
| CN206015668U (en) | A kind of T-shaped pours into a mould the T-shaped drilling tool of pile driving construction | |
| CN203769662U (en) | One-way spiral semi-soil-squeezing drill bit | |
| CN213061989U (en) | High-pressure rotary spraying device | |
| CN210768606U (en) | Drilling tool device for spiral soil-squeezing pressure-grouting pile | |
| CN115125938B (en) | Composite pile construction method for built-in prefabricated pipe pile | |
| CN110219597B (en) | Drilling tool device for spiral soil squeezing and pile pressing and pile foundation pile construction method | |
| CN216920297U (en) | Construction device for long spiral drilling and pressure pouring concrete pile | |
| CN115928740A (en) | Method and device for reaming long spiral bored pile by grouting and spraying first | |
| CN101245597A (en) | Breast wall type cast-in-situ bored pile construction method and pile machine | |
| CN213476851U (en) | Screw tooth column pressure filling pile and drill bit device for pile forming | |
| CN201851001U (en) | Drilling machine for constructing piles with high bearing capacity | |
| CN114016499A (en) | Long spiral drill hole pressure-cast concrete pile and construction method and construction device thereof | |
| WO2021135156A1 (en) | Construction apparatus for deep stirring by using curing material and construction method therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |