CN218669229U - Improved jet grouting pile drill bit for expanding in weathered rock stratum - Google Patents
Improved jet grouting pile drill bit for expanding in weathered rock stratum Download PDFInfo
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- CN218669229U CN218669229U CN202223231213.4U CN202223231213U CN218669229U CN 218669229 U CN218669229 U CN 218669229U CN 202223231213 U CN202223231213 U CN 202223231213U CN 218669229 U CN218669229 U CN 218669229U
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Abstract
The utility model belongs to the technical field of the stake of spouting soon, a improve stake drill bit that spouts soon that is arranged in morals and manners rock stratum to expand is related to. The utility model discloses mainly drilling the subassembly through setting up thickening drill bit board and welding three group dig the pick commonly used in the rig drill bit soon, the pick wearability is better, and is certain time at pressure, and is better for the broken rock effect of ordinary alloy drill bit, after the pilot hole construction, the pile drill bit that spouts soon of modified can follow the position of preforming and continue to cut the rock, can to a great extent enlarge the stake footpath of spouting soon when the construction in the morals and manners stratum. The cutting tooth of the improved rotary spraying pile drill bit is installed in the installation sleeve welded on the rotary spraying drill bit, the drill bit does not need to be replaced after the cutting tooth is worn out and damaged, the cutting tooth is directly replaced, the cost is saved, meanwhile, the improved rotary spraying drill bit reaming assembly is simple, the improved rotary spraying drill bit reaming assembly can be shared with a rotary drilling rig drilling tooth, and the improved rotary spraying pile drill bit is convenient to refit and maintain under construction conditions.
Description
Technical Field
The utility model belongs to the technical field of the stake of spouting soon, a improve stake drill bit that spouts soon that is arranged in morals and manners rock stratum to expand is related to.
Background
Along with the increasing construction scale and depth of urban foundation pits and underground engineering, the requirement on foundation pit water stop engineering is higher, wherein the jet grouting pile has the characteristics of strong stratum adaptability and good water stop effect, and different construction processes can be selected according to engineering requirements and geological conditions to form jet grouting pile bodies with different diameters; therefore, the jet grouting pile is more and more widely applied to foundation pit water stopping engineering.
When the jet grouting pile is used for a foundation pit waterproof curtain, the jet grouting pile can be suitable for construction of most of silt, mucky soil, cohesive soil, sandy soil and gravel layers. However, for drilling a weathered rock layer with a water stop requirement, especially for strongly weathered or moderately weathered rocks, the drilling difficulty of the jet grouting pile is very high, the hole expansion is difficult, and the jet grouting pile construction is often performed after hole leading by matching with other drilling machines.
In an earth-rock combined stratum or a karst development stratum, a conventional jet grouting pile is designed to be embedded into a strongly weathered or moderately weathered rock stratum to a certain depth to ensure a water stopping effect, a conventional hard alloy drill bit equipped with the conventional jet grouting pile can only drill into a strongly weathered layer of extremely soft rock or relatively soft rock to a certain depth, most of the strongly weathered and moderately weathered rock stratum need to be subjected to jet grouting construction after hole leading, and the pile forming diameter cannot be effectively ensured while the hole leading pile forming efficiency can be reduced.
SUMMERY OF THE UTILITY MODEL
In order to solve the construction of conventional jet grouting pile drill bit and creep into the difficulty in the morals and manners stratum, the less problem of stake diameter, the utility model provides an improve jet grouting pile drill bit, the jet grouting hole enlargement construction behind the jet grouting lead hole in the efflorescence ~ the stroke ization stratum of mainly used extremely soft rock, harder rock, or the direct pore-forming construction of jet grouting pile in the extremely soft rock ~ the soft rock efflorescence stratum, mainly dig the drill bit subassembly through thickening drill bit board and welding three group pick commonly used in the rig drill bit soon, the pick wearability is better, it is certain at pressure, it is better for ordinary alloy drill bit rock breaking effect, after the lead hole construction, the position of hole in advance can be followed to the improved jet grouting pile drill bit continues to cut the rock, can to a great extent expand the pile footpath of jet grouting pile when being under construction in the morals and manners stratum. The cutting tooth of the improved rotary spraying pile drill bit is installed in the installation sleeve welded on the rotary spraying drill bit, the drill bit does not need to be replaced after the cutting tooth is worn out and damaged, the cutting tooth is directly replaced, the cost is saved, meanwhile, the improved rotary spraying drill bit reaming assembly is simple, the improved rotary spraying drill bit reaming assembly can be shared with a rotary drilling rig drilling tooth, and the improved rotary spraying pile drill bit is convenient to refit and maintain under construction conditions.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an improved jet grouting pile drill bit for expanding in a weathered rock stratum mainly comprises a thickened drill head plate 10, a cutting pick mounting sleeve 14, a first cutting pick 11, a second cutting pick 12, a third cutting pick 13 and a conventional jet grouting drill bit pipe; the thickened drill head plate 10 is arranged at the front end position of the end head 9 of the rotary jet drill bit pipe; 3 cutting pick mounting sleeves 14 are respectively used for mounting a first cutting pick 11, a second cutting pick 12 and a third cutting pick 13; the cutting pick mounting sleeve 14 is uniformly and obliquely arranged on the bottom surface of the thickened drill head plate 10, and the included angle between the cutting pick mounting sleeve 14 and the central axis of the rotary jet drill head pipe is 45 degrees; the cutting pick mounting sleeve 14 is further welded and fixed with the outer wall of the jet grouting drill pipe through a reinforcing welding plate 15.
When the rotary jet drill bit pipe of the double-pipe rotary jet drill bit is adopted, the rotary jet drill bit pipe mainly comprises a grouting pipe joint 1, a grouting pipe 2, a compressed air pipe 3, a drill bit outer pipe 4, a high-pressure air nozzle 5, a cement paste nozzle 6, a grouting pipe plug 8 and a rotary jet drill bit pipe end 9; a grouting pipe 2 is arranged in the drill bit outer pipe 4, and a sealed compressed air pipe (3) is formed in a space between the drill bit outer pipe 4 and the grouting pipe 2 by arranging a grouting pipe plug 8 and a rotary jet drill bit pipe end 9; the grouting pipe joint 1 is arranged at the tail ends of the grouting pipe 2 and the drill bit outer pipe 4; holes are formed in the drill bit outer pipe 4 and the grouting pipe 2 and used for forming a high-pressure air nozzle 5 and a cement paste nozzle 6, the high-pressure air nozzle 5 is communicated with the compressed air pipe 3, and the cement paste nozzle 6 is communicated with the grouting pipe 2; the thickened drill head plate 10 is arranged at the front end of the end head 9 of the jet grouting drill bit pipe, and the cutting pick mounting sleeve 14 is further welded and fixed with the drill bit outer pipe 4 through the reinforced welding plate 15.
In order to avoid the damage to the nozzle during the rock formation construction, a nozzle protection sleeve 7 is arranged on the outer rings of the high-pressure air nozzle 5 and the cement slurry nozzle 6.
The utility model has the advantages that:
1. the utility model provides a pair of a reaming improvement jet grouting pile drill bit in being arranged in morals and manners stratum, the repacking is simple, bore the tooth subassembly and pass through welded mode and jet grouting drill bit union coupling, and the pick detritus effect is better, and the commonality is strong, and construction conditions can quick replacement.
2. The utility model discloses a drill tooth subassembly is through the drill bit board and strengthen welding plate and conventional jet-grouting drill bit pipe welded fastening, and the pick installation cover is 45 squids with the jet-grouting outer tube, can form the great broken face of area in jet-grouting drill bit bottom surface behind the installation pick, can effectively enlarge under the condition that jet-grouting pile technology does not do the adjustment and spout the pile forming diameter who spouts the rock segment soon.
3. The improved rotary jet drill bit is mainly used for reaming construction of a rotary jet pile with a preformed hole, a cutting pick crushing assembly is obliquely crossed with a rock wall of the preformed hole, and rocks are crushed along a hollow surface of the wall of the hole in a cutting mode, so that the pile forming diameter of a rock entering section of the rotary jet pile can be effectively enlarged, rock debris formed by the crushed rocks can be directly solidified with cement slurry jetted by rotary jet to form a pile body, and the water stopping effect of the rotary jet pile is improved; meanwhile, the improved rotary jet drill bit can also be used for the direct pore-forming construction of the rotary jet pile in the extremely soft rock-soft rock strong weathering layer.
Drawings
FIG. 1 is a schematic sectional view of the improved jet grouting pile drill for expanding the diameter in a weathered rock formation according to the present invention;
FIG. 2 is a top view of an improved jet grouting pile bit for expanding a diameter in a weathered rock formation according to the present invention;
in the figure: 1 grouting pipe joint; 2, grouting a pipe; 3, compressing an air pipe; 4, drilling bit outer pipe; 5 high-pressure air nozzles; 6, a cement paste nozzle; 7, a nozzle protective sleeve; 8, grouting pipe plug; 9, carrying out jet grouting on the end of a drill bit pipe; 10 thickening the drill plate; 11, cutting pick I; 12, a second cutting pick; 13 cutting pick III; 14 cutting pick mounting sleeves; 15 reinforcing the welding plate; and (3) reaming a profile of the 16 jet grouting pile.
Detailed Description
The following further describes a specific embodiment of the present invention with reference to the drawings and technical solutions.
The utility model discloses a reaming improvement jet grouting pile drill bit in weathering rock stratum, its main view and inner structure section sketch map are shown in figure 1. The conventional rotary jet drill comprises a grouting pipe joint 1, a grouting pipe 2, a compressed air pipe 3, a rotary jet drill pipe end 9, a hard alloy guide head and other parts; after the hole is formed in the rotary spraying pile, compressed air prepared by an external air compressor is conveyed to the high-pressure air injection nozzle 5 through a compressed air pipe 3, prepared cement slurry is pumped by a slurry pump and then conveyed to a cement slurry injection nozzle 6 through a grouting pipe 2 to be injected with the cement slurry, and a rotary spraying pile body is formed by lifting a drill rod and synchronously spraying the cement slurry; the utility model provides an improvement jet-grouting drill bit whitewashing becomes stake theory of operation similar with above-mentioned conventional jet-grouting drill bit, as an improvement, the jet-grouting drill bit structure has mainly increased thickening drill head board 10, pick installation cover 14, pick 11, pick two 12, three 13 reaming constructions that are arranged in the morals and manners stratum of pick, thickening drill head board 10 is connected with conventional jet-grouting drill bit pipe end 9, pick 11, pick two 12, three 13 of pick welds in the 4 outsides of drill bit outer tube through 14 equipartition oblique crossings of pick installation cover, and guarantee joint strength through addding reinforcing weld plate 15, for avoiding the nozzle to bore into in-process wearing and tearing at the morals and manners stratum, nozzle protective sheath 7 has been add in the nozzle periphery.
Taking a double-pipe rotary-jetting pile-forming process after hole pre-forming as an example, a rotary-jetting drilling machine is connected with a grouting pipe joint 1 through a double-wall drill rod, and the grouting pipe joint 1 is connected with a grouting pipe 2 and a compressed air pipe 3; the drilling tool with the improved jet-grouting drill bit is drilled to the rock entering section by using the jet-grouting drilling machine, and the pile forming diameter of the rock section is enlarged in a cutting and reaming mode when the drilling tool is embedded into the weathered rock layer section, as shown in figure 2, the improved jet-grouting drill bit can be used for crushing bodies with the area about 1 time the projection area of the outer pipe of the rock section-shaped drill bit. After drilling to the designed hole depth, the high-pressure equipment enables cement paste to be conveyed to a cement paste nozzle 6 through a grouting pipe 2 for spraying, compressed air is conveyed to a high-pressure air nozzle 5 through a compressed air pipe 3 for air injection, and a rotary jet pile body is formed by punching and stirring soil bodies through combination of the cement paste and the compressed air; through the equipped improved rotary jet drill, the cutting pick crushing component of the rotary jet drill is obliquely crossed with the preformed hole rock wall of the rock entering section, crushed rocks formed by the rock section crushed rocks can be directly solidified with cement slurry jetted by rotary jet to form a rotary jet pile body, the rocks are crushed along the preformed hole wall in a cutting mode, the pile forming diameter of the rotary jet pile rock entering section can be effectively enlarged, namely, under the same rotary jet process condition, the rock section can form a rotary jet pile body with the diameter of a rotary jet pile reaming outline 16, and the water stopping and seepage preventing effects are enhanced.
Simultaneously, when carrying out the jet grouting stake in the extremely soft rock of certain degree of depth to needs embedding extremely soft rock ~ soft rock strong weathering layer, because extremely soft rock ~ soft rock strong weathering layer hardness is not high, can directly utilize the utility model provides an improve the detritus advantage of jet grouting drill bit, adopt the direct detritus pore-forming of non-leading hole construction technology.
As an improvement, improvement jet grouting pile drill bit mainly used reaming construction in the morals and manners stratum, the utility model provides a repacking mode comparatively simple, mainly through set up thickening drill bit board and three groups of welding dig the pick that rig drill bit was used commonly and advance the subassembly and carry out the reaming construction soon, bore the tooth for the alloy that ordinary jet grouting drill bit was equipped with, the pick wearability is better, broken rock effect is better, bores the pick commonality among the tooth subassembly and is strong, can realize quick replacement under construction conditions.
The working process of the utility model is as follows:
1. pre-drilling a hole of a rotary spraying pile needing to be embedded into weathered rock at a certain depth, and positioning a rotary spraying drilling machine after the hole is formed; (this step is not required when the socketed section is a very soft rock-soft rock highly weathered layer)
2. The drill rod of the rotary jet drilling machine is connected with a grouting pipe joint 1, a grouting pipe 2, a compressed air pipe 3, a drill bit outer pipe 4, a thickened drill head plate 10, a cutting tooth and the like to carry out pore-forming construction, and rotary jet pore-forming construction is carried out after the drilling rod is aligned with a pre-forming hole;
3. after entering a rock stratum, exerting the advantage of rock crushing and diameter expanding of a cutting pick crushing assembly in the improved rotary jet pile drill bit, and drilling to the designed rock embedding depth to form a rotary jet pile hole;
4. and starting an external air compressor and a mud pump, lifting the drill rod and performing rotary spraying grouting while, wherein the cement slurry at the rock section can form a rotary spraying reinforcing body with crushed rocks to form crushed rocks, and the non-rock section can normally cut and mix a soil body to form a reinforcing body by grouting.
The utility model discloses a reaming improvement jet grouting pile drill bit in being arranged in morals and manners stratum, be different from traditional jet grouting pile carbide drill bit or other reamer drill bits, ordinary drill bit and high pressure water jet hardly carry out reaming construction in morals and manners stratum, the utility model provides an improve drill bit adopts thickening drill bit board and welds three group's picks and creeps into the subassembly, and the strong and broken rock of performance pick wearability is effectual characteristics, adopts modified jet grouting pile drill bit to continue to enlarge the inserted rock section diameter along the position of preforming hole after jet grouting the pilot hole construction soon, can to a great extent enlarge the stake footpath of jet grouting pile when being under construction in morals and manners stratum, improves the stagnant water effect in the stratum, and the improved jet grouting drill bit reaming subassembly is comparatively simple simultaneously, is convenient for repacking and maintenance under the construction conditions.
Claims (3)
1. The improved jet grouting pile drill bit for expanding in the weathered rock stratum is characterized by mainly comprising a thickened drill head plate (10), a cutting pick mounting sleeve (14), a cutting pick I (11), a cutting pick II (12), a cutting pick III (13) and a jet grouting drill bit pipe; the thickened drill head plate (10) is arranged at the end (9) of the rotary jet drill bit pipe; the number of the cutting pick mounting sleeves (14) is 3, and the cutting pick mounting sleeves are respectively used for mounting a first cutting pick (11), a second cutting pick (12) and a third cutting pick (13); the cutting pick mounting sleeve (14) is uniformly and obliquely arranged on the bottom surface of the thickened drill head plate (10), and the included angle between the cutting pick mounting sleeve (14) and the central axis of the rotary jet drill head pipe is 45 degrees; the cutting pick mounting sleeve (14) is further welded and fixed with the outer wall of the rotary jet drill bit pipe through a reinforcing welding plate (15).
2. The improved jet grouting pile drill bit for expanding the diameter in the weathered rock stratum according to claim 1 is characterized in that when a jet grouting drill bit pipe of a dual-pipe jet grouting drill bit is adopted, the jet grouting drill bit pipe mainly comprises a grouting pipe joint (1), a grouting pipe (2), a compressed air pipe (3), a drill bit outer pipe (4), a high-pressure air nozzle (5), a cement paste nozzle (6), a grouting pipe plug (8) and a jet grouting drill bit pipe end (9); a grouting pipe (2) is arranged in the drill bit outer pipe (4), and a sealed compressed air pipe (3) is formed in a space between the drill bit outer pipe (4) and the grouting pipe (2) by arranging a grouting pipe plug (8) and a rotary spraying drill bit pipe end (9); the grouting pipe joint (1) is arranged at the tail ends of the grouting pipe (2) and the drill bit outer pipe (4); the drill bit outer pipe (4) is provided with holes for forming a high-pressure air nozzle (5) and a cement paste nozzle (6), the high-pressure air nozzle (5) is communicated with the compressed air pipe (3), and the cement paste nozzle (6) is communicated with the grouting pipe (2); the thickened drill head plate (10) is arranged at the front end of the end head (9) of the jet grouting drill bit pipe, and the cutting pick installation sleeve (14) is further welded and fixed with the drill bit outer pipe (4) through the reinforced welding plate (15).
3. An improved jet grouting pile bit for expanding a diameter in a weathered rock formation, according to claim 2, characterised in that a nozzle protection casing (7) is arranged at the outer ring of the high pressure air nozzle (5) and the cement slurry nozzle (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223231213.4U CN218669229U (en) | 2022-12-02 | 2022-12-02 | Improved jet grouting pile drill bit for expanding in weathered rock stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223231213.4U CN218669229U (en) | 2022-12-02 | 2022-12-02 | Improved jet grouting pile drill bit for expanding in weathered rock stratum |
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| Publication Number | Publication Date |
|---|---|
| CN218669229U true CN218669229U (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223231213.4U Active CN218669229U (en) | 2022-12-02 | 2022-12-02 | Improved jet grouting pile drill bit for expanding in weathered rock stratum |
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| Country | Link |
|---|---|
| CN (1) | CN218669229U (en) |
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2022
- 2022-12-02 CN CN202223231213.4U patent/CN218669229U/en active Active
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