High-pressure jet grouting device for building construction

Abstract

The utility model relates to the technical field of building construction, and provides a high-pressure jet grouting device for building construction, which comprises a drill rod, a drill bit and a jet grouting device, the jet grouting device comprises a first mixing bin, a second mixing bin, a drill rod sleeve and the like, and the lower end of the drill rod is fixedly connected with the drill bit and a drill rod bottom supporting plate. The first mixing bin is formed by sealing two ends of a first outer sleeve and two ends of a first inner sleeve through a first upper sealing plate and a first lower sealing plate, the first outer sleeve is provided with a slurry spraying hole, the first upper sealing plate is provided with a cement slurry pipe connector and an additive pipe connector, the second mixing bin is formed by sealing two ends of a second outer sleeve and two ends of a second inner sleeve through a second upper sealing plate and a second lower sealing plate, and the second outer sleeve is provided with a second spraying hole. The first mixing bin, the second mixing bin and the drill rod sleeve sequentially penetrate through the drill rod and are fixedly connected in series, the water spraying pipe and the air spraying pipe penetrate through the drill rod sleeve, and the lower ends of the water spraying pipe and the air spraying pipe are connected with the water slurry pipe connector, the air spraying pipe connector, the water spraying pipe connector and the air spraying pipe connector respectively. During use, the upper end of the drill rod is fixedly connected with a drilling machine, and the mixing proportion of sprayed cement paste and additives can be adjusted during work, so that better hole forming quality is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a high-pressure rotary spraying device for pile forming. Background Art

[0002] High-pressure rotary jet device is an important equipment widely used in the fields of foundation reinforcement, earthwork support, environmental protection, etc. The high-pressure rotary jet device sprays high-pressure water and cement, mortar and other materials into the ground to form a compacted and reinforced soil body, thereby achieving the purpose of strengthening the soil body and improving the bearing capacity of the soil body. High-pressure rotary jet piles can not only enhance the bearing capacity of the foundation, but also improve the compactness of the foundation, improve the stability of the foundation, and effectively avoid problems such as foundation settlement; the existing patent (Announcement No.: CN213625557U) is a double-liquid triple-tube high-pressure rotary jet construction device and system. The high-pressure rotary jet device adopts double-liquid triple-tube high-pressure rotary jet technology. The device can realize underground rapid solidification piles in sandy loose permeable strata and strata with large groundwater flow rate and flow rate, improve the density of the solidified body, and has the characteristics of greatly improving the quality of piles, reducing construction costs, and low noise and vibration. However, when constructing under geological conditions with complex geological and hydrological conditions and a large number of geological structural layers, it is impossible to switch the grouting ratio according to the characteristics of the strata to adapt to the changes in the strata, so that the pile quality cannot achieve the best effect. Summary of the invention

[0003] The utility model aims to provide a high-pressure rotary grouting device for construction, which is connected with a drilling rig to drill holes and form piles, and can switch the grouting ratio according to the characteristics of the stratum to adapt to the stratum changes, so that the pile quality can achieve the best effect.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A high-pressure rotary spraying device for construction comprises a drill rod, a drill bit and a rotary spraying device, wherein the rotary spraying device comprises a first mixing chamber, a second mixing chamber, a drill rod casing, a cement slurry spraying pipe, an admixture spraying pipe, a water spraying pipe and an air spraying pipe.

[0006] The upper end of the drill rod is used to connect to the drilling rig, the lower end of the drill rod is fixedly connected to the drill bit, a drill rod bottom support plate is fixedly arranged near the lower end of the drill rod, and a plurality of bottom support plate holes are evenly distributed near the edge of the drill rod bottom support plate.

[0007] The inner diameter of the drill pipe casing is larger than the diameter of the drill pipe, the upper end of the drill pipe casing has an upper end plate, and the lower end has a lower end plate. A plurality of casing end plate holes are evenly distributed near the edges of the upper end plate and the lower end plate, and the spacing of the casing end plate holes is consistent with the bottom support plate holes on the drill pipe bottom support plate.

[0008] The first mixing chamber comprises a first outer casing with a diameter equivalent to that of the drill pipe casing and a first inner casing with an inner diameter slightly larger than that of the drill pipe. The first upper sealing plate and the first lower sealing plate respectively cover the two ends of the first outer casing and the first inner casing to form a first mixing chamber inside. The first upper sealing plate and the first lower sealing plate respectively have an annular expansion portion and are provided with a plurality of first end plate holes evenly distributed near the edge. The spacing of the first end plate holes is consistent with the bottom support plate holes on the drill pipe bottom support plate. The first outer casing is provided with 4 to 8 slurry spray holes. The first upper sealing plate is provided with two joint mounting holes near the inner side and are respectively provided with a cement slurry pipe joint and an admixture pipe joint. The cement slurry pipe joint and the admixture pipe joint are connected with the first mixing chamber.

[0009] The second mixing chamber comprises a second outer sleeve with a diameter equivalent to that of the drill pipe casing and a second inner sleeve with an inner diameter greater than that of the drill pipe, the inner diameter of the second inner sleeve being greater than that of the first inner sleeve of the first mixing chamber, the second upper sealing plate and the second lower sealing plate respectively cover the two ends of the second outer sleeve and the second inner sleeve to form a second mixing chamber inside, the second upper sealing plate and the second lower sealing plate respectively have an annular expansion portion and are provided with a plurality of second end plate holes evenly distributed near the edge, the spacing of the second end plate holes is consistent with the bottom support plate holes on the drill pipe bottom support plate, the second outer sleeve is provided with 4 to 8 second spray holes, the second upper sealing plate is provided with two joint mounting holes near the inner side and are respectively provided with a water spray pipe joint and an air spray pipe joint, the water spray pipe joint and the air spray pipe joint are connected with the second mixing chamber.

[0010] The first mixing chamber, the second mixing chamber and the drill pipe casing are inserted into the drill pipe in sequence, the first lower sealing plate of the first mixing chamber abuts against the drill pipe bottom supporting plate and is fixedly connected, the cement slurry nozzle and the admixture nozzle pass through the drill pipe casing and the second mixing chamber, and their lower ends are respectively connected to the cement slurry pipe joint and the admixture pipe joint.

[0011] The second lower sealing plate of the second mixing chamber abuts against the first upper sealing plate of the first mixing chamber and is fixedly connected. The water nozzle and the air nozzle pass through the drill pipe casing. The lower end of the water nozzle is connected to the water nozzle joint, and the lower end of the air nozzle is connected to the ventilation nozzle joint.

[0012] The lower end plate of the drill pipe casing is abutted against the second upper sealing plate of the second mixing chamber and fixedly connected, and multiple sections of drill pipe casing can be connected in series to adapt to drill pipes of different lengths.

[0013] Optimization plan: Change the positions of the two joint mounting holes of the second mixing chamber to the second inner sleeve and install a water nozzle elbow and an air nozzle elbow respectively. The water nozzle elbow and the air nozzle elbow are connected to the second mixing chamber. The lower end of the water nozzle is connected to the water nozzle elbow, and the lower end of the air nozzle is connected to the ventilation nozzle elbow. This structure allows multiple second mixing chambers to be stacked and used, and multiple liquids can be input into the rotary spray device.

[0014] When in use, the cement slurry nozzle is connected to the cement slurry delivery pipe, the admixture nozzle is connected to the admixture delivery pipe, the air nozzle is connected to the compressed air delivery pipe, and the water nozzle is connected to the high-pressure water delivery pipe.

[0015] During operation, the upper end of the drill rod is fixedly connected to the drilling rig. When drilling begins downward, in order to prevent the nozzle from being blocked, compressed air needs to be supplied at low pressure through the air nozzle or water nozzle, cement slurry nozzle or admixture nozzle. After drilling to a certain depth, the water nozzle is changed to deliver high-pressure water, and the air nozzle is also changed to deliver high-pressure gas. The high-pressure water and high-pressure gas are sprayed out from the second nozzle hole of the second mixing chamber to cut the soil, and the drill bit also cuts the soil at the same time.

[0016] When the drill bit reaches the designed depth, the mud pump and the admixture pump are turned on, and the pressure of the compressed air and high-pressure water is increased at the same time. During this process, the compressed air and high-pressure water will guide and cut the soil first, and the cement slurry nozzle pipe is connected to the cement slurry injection pipe through the conversion valve, and the admixture nozzle pipe is connected to the admixture injection pipe through the conversion valve. The cement slurry and the admixture are mixed in the first mixing chamber and then sprayed out from the slurry spray hole of the first mixing chamber.

[0017] Compared with the prior art, the utility model has the following substantial features and improvements:

[0018] 1. The utility model has a simple structure and is easy to use.

[0019] 2. The utility model can meet the high-pressure jet grouting pile construction under complex geological conditions. It is a method of injecting water, compressed air, cement slurry, and admixtures for injection, stirring, mixing, and spraying. Different admixtures can be added according to different geological environments to adjust the mixing ratio of the sprayed cement slurry and additives to achieve better hole quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of component disassembly of the utility model.

[0021] Figure 2 It is a schematic diagram of the appearance of the utility model.

[0022] Figure 3 Another structural schematic diagram of the second mixing bin of the present invention. DETAILED DESCRIPTION

[0023] The utility model is further described below with embodiments:

[0024] Example 1

[0025] refer to Figure 1 and Figure 2 A high-pressure rotary grouting device for construction includes a drill rod 1, a drill bit 2 and a rotary grouting device.

[0026] The rotary spraying device includes a first mixing chamber 3, a second mixing chamber 4, a drill pipe casing 5, a cement slurry spray pipe 6, an admixture spray pipe 7, a water spray pipe 8 and an air spray pipe 9.

[0027] The upper end of the drill rod 1 is used to connect to the drilling rig, and the lower end of the drill rod 1 is fixedly connected to the drill bit 2. A drill rod bottom support plate 11 is fixedly provided near the lower end of the drill rod 1, and a plurality of bottom support plate holes 10 are evenly distributed near the edge of the drill rod bottom support plate 11.

[0028] The inner diameter of the drill pipe casing 5 is larger than the diameter of the drill pipe 1. The upper end of the drill pipe casing 5 has an upper casing end plate 51, and the lower end has a lower casing end plate 52. A plurality of casing end plate holes 50 are evenly distributed near the edges of the upper casing end plate 51 and the lower casing end plate 52. The spacing of the casing end plate holes 50 is consistent with the bottom support plate holes 10 on the drill pipe bottom support plate 11.

[0029] The first mixing chamber 3 has a first outer sleeve 31 with a diameter equivalent to the drill pipe casing 5 and a first inner sleeve 32 with an inner diameter slightly larger than the diameter of the drill pipe 1. The first upper sealing plate 34 and the first lower sealing plate 35 respectively cover the two ends of the first outer sleeve 31 and the first inner sleeve 32 to form a first mixing chamber inside. The first upper sealing plate 34 and the first lower sealing plate 35 respectively have an annular expansion portion and are evenly distributed with a plurality of first end plate holes 30 near the edge. The intervals of the first end plate holes 30 are consistent with the bottom support plate holes 10 on the drill pipe bottom support plate 11. The first outer sleeve 31 is provided with 4 slurry spray holes 33. The first upper sealing plate 34 is provided with 2 joint installation holes near the inner side and are respectively installed with cement slurry pipe joints 36 and admixture pipe joints 37. The cement slurry pipe joints 36 and the admixture pipe joints 37 are connected to the first mixing chamber.

[0030] The second mixing chamber 4 comprises a second outer sleeve 41 having a diameter equivalent to that of the drill pipe sleeve 5 and a second inner sleeve 42 having an inner diameter greater than that of the drill pipe 1. The inner diameter of the second inner sleeve 42 is greater than the inner diameter of the first inner sleeve 32 of the first mixing chamber 3. The second upper sealing plate 44 and the second lower sealing plate 45 respectively cover the two ends of the second outer sleeve 41 and the second inner sleeve 42 to form a second mixing chamber inside. The second upper sealing plate 44 and the second lower sealing plate 45 respectively have an annular expansion portion and are evenly distributed with a plurality of second end plate holes 40 near the edge. The intervals of the second end plate holes 40 are consistent with the bottom support plate holes 10 on the drill pipe bottom support plate 11. The second outer sleeve 41 is provided with four second spray holes 43. The second upper sealing plate 44 is provided with two joint mounting holes near the inner side and are respectively provided with a water spray pipe joint 48 and an air spray pipe joint 49. The water spray pipe joint 48 and the air spray pipe joint 49 are connected with the second mixing chamber.

[0031] The first mixing chamber 3, the second mixing chamber 4 and the drill pipe casing 5 are inserted into the drill pipe 1 in sequence, the first lower sealing plate 35 of the first mixing chamber 3 abuts against the drill pipe bottom supporting plate 11, the screws pass through the first end plate hole 30 and the bottom supporting plate hole 10 and the nuts are tightened, the cement slurry nozzle 6 and the admixture nozzle 7 pass through the drill pipe casing 5 and the second mixing chamber 4, and their lower ends are respectively connected to the cement slurry pipe joint 36 and the admixture pipe joint 37.

[0032] The second lower sealing plate 45 of the second mixing chamber 4 abuts against the first upper sealing plate 34 of the first mixing chamber 3, the screws pass through the second end plate holes 40 and the first end plate holes 30 and are tightened with nuts, the water nozzle 8 and the air nozzle 9 pass through the drill pipe casing 5, and their lower ends are respectively connected to the water nozzle joint 48 and the air nozzle joint 49.

[0033] The lower end plate 52 of the drill pipe casing 5 is in contact with the second upper sealing plate 44 of the second mixing chamber 4. The screws pass through the casing end plate hole 50 and the second end plate hole 40 and are tightened with nuts. Multiple sections of drill pipe casing 5 can be connected in series to adapt to drill pipes 1 of different lengths.

[0034] When in use, the cement slurry nozzle 6 is connected to the cement slurry delivery pipe, the admixture nozzle 7 is connected to the admixture delivery pipe, the air nozzle 9 is connected to the compressed air delivery pipe, and the water nozzle 8 is connected to the high-pressure water delivery pipe.

[0035] During operation, the upper end of the drill rod 1 is fixedly connected to the drilling rig. When drilling begins downward, in order to prevent the nozzle from being blocked, compressed air needs to be supplied at low pressure through the air nozzle 9 or the water nozzle 8, the cement slurry nozzle 6 or the admixture nozzle 7. The gas is sprayed out from the second spray hole 43 of the second mixing chamber 4 and the slurry spray hole 33 of the first mixing chamber 3.

[0036] After drilling to a certain depth, the water nozzle 8 is changed to deliver high-pressure water, and the air nozzle 9 is also changed to deliver high-pressure gas. The high-pressure water and high-pressure gas are sprayed out from the second spray hole 43 of the second mixing chamber 4 to cut the soil, and the drill bit 2 also cuts the soil.

[0037] When the drill bit 2 reaches the designed depth, the mud pump and the admixture pump are turned on, and the pressure of the compressed air and the high-pressure water is increased at the same time. In this process, the compressed air and the high-pressure water will guide and cut the soil first, and the cement slurry nozzle 6 is connected to the cement slurry injection pipe through the conversion valve, and the admixture nozzle 7 is connected to the admixture injection pipe through the conversion valve. The cement slurry and the admixture are mixed in the first mixing chamber and then sprayed from the slurry spray hole 33 of the first mixing chamber 3 to perform subsequent expansion and cutting on the soil. The cement slurry, the admixture and the soil are mixed to achieve the reinforcement effect. At the same time, the operator can use different admixture liquids to inject and mix with the cement slurry according to different geological environments to meet the different reinforcement conditions required for different geological layers.

[0038] Example 2

[0039] The difference between this embodiment and embodiment 1 is that the positions of the two joint mounting holes of the second mixing chamber 4 are changed to the second inner sleeve 42 and are respectively installed with a water nozzle elbow 46 and an air nozzle elbow 47, the water nozzle elbow 46 and the air nozzle elbow 47 are connected to the second mixing chamber, the lower end of the water nozzle 8 is connected to the water nozzle elbow 46, and the lower end of the air nozzle 9 is connected to the ventilation nozzle elbow 47.

[0040] This structure allows multiple second mixing chambers 4 to be stacked and used to input multiple liquids into the rotary spray device. This second mixing chamber 4 can also be used in conjunction with the second mixing chamber 4 of Example 1.

Claims

1. A high-pressure jet spraying device for construction, comprising a drill rod (1), a drill bit (2) and a jet spraying device, characterized in that: The rotary spraying device comprises a first mixing chamber (3), a second mixing chamber (4), a drill pipe casing (5), a cement slurry spray pipe (6), an admixture spray pipe (7), a water spray pipe (8) and an air spray pipe (9); The upper end of the drill rod (1) is used to connect to the drilling machine, the lower end of the drill rod (1) is fixedly connected to the drill bit (2), a drill rod bottom support plate (11) is fixedly arranged near the lower end of the drill rod (1), and a plurality of bottom support plate holes (10) are evenly distributed near the edge of the drill rod bottom support plate (11); The inner diameter of the drill pipe casing (5) is larger than the diameter of the drill pipe (1); the upper end of the drill pipe casing (5) comprises an upper casing end plate (51), and the lower end comprises a lower casing end plate (52); a plurality of casing end plate holes (50) are evenly distributed near the edges of the upper casing end plate (51) and the lower casing end plate (52); and the spacing of the casing end plate holes (50) is consistent with the bottom support plate holes (10) on the drill pipe bottom support plate (11); The first mixing chamber (3) comprises a first outer casing (31) having a diameter equivalent to that of a drill pipe casing (5) and a first inner casing (32) having an inner diameter slightly larger than that of the drill pipe (1). A first upper sealing plate (34) and a first lower sealing plate (35) respectively cover both ends of the first outer casing (31) and the first inner casing (32) so that a first mixing chamber is formed inside. The first upper sealing plate (34) and the first lower sealing plate (35) respectively have an annular expansion portion and are evenly distributed near the edge. A plurality of first end plate holes (30) are arranged, and the intervals of the first end plate holes (30) are consistent with the bottom support plate holes (10) on the drill pipe bottom support plate (11). The first outer casing (31) is provided with 4 to 8 slurry spray holes (33). The first upper sealing plate (34) is provided with two joint installation holes near the inner side and is respectively provided with a cement slurry pipe joint (36) and an admixture pipe joint (37). The cement slurry pipe joint (36) and the admixture pipe joint (37) are connected with the first mixing chamber. The second mixing chamber (4) comprises a second outer sleeve (41) having a diameter equivalent to that of the drill pipe sleeve (5) and a second inner sleeve (42) having an inner diameter greater than that of the drill pipe (1); the inner diameter of the second inner sleeve (42) is greater than the inner diameter of the first inner sleeve (32) of the first mixing chamber (3); a second upper sealing plate (44) and a second lower sealing plate (45) respectively cover the two ends of the second outer sleeve (41) and the second inner sleeve (42) so that a second mixing chamber is formed inside; the second upper sealing plate (44) and the second lower sealing plate (45) are 5) each having an annular expansion portion and a plurality of second end plate holes (40) evenly distributed near the edge, the intervals of the second end plate holes (40) being consistent with the bottom support plate holes (10) on the drill pipe bottom support plate (11), the second outer sleeve (41) being provided with 4 to 8 second spray holes (43), the second upper sealing plate (44) being provided with two joint mounting holes near the inner side and respectively provided with a water spray pipe joint (48) and an air spray pipe joint (49), the water spray pipe joint (48) and the air spray pipe joint (49) being communicated with the second mixing chamber; The first mixing chamber (3), the second mixing chamber (4) and the drill pipe casing (5) are sequentially inserted into the drill pipe (1); the first lower sealing plate (35) of the first mixing chamber (3) is abutted against the drill pipe bottom supporting plate (11); the screws are passed through the first end plate hole (30) and the bottom supporting plate hole (10) and the nuts are tightened; the cement slurry spray pipe (6) and the admixture spray pipe (7) pass through the drill pipe casing (5) and the second mixing chamber (4); and the lower ends thereof are respectively connected to the cement slurry pipe joint (36) and the admixture pipe joint (37); The second lower sealing plate (45) of the second mixing chamber (4) is abutted against the first upper sealing plate (34) of the first mixing chamber (3), the screws are passed through the second end plate holes (40) and the first end plate holes (30) and the nuts are tightened, the water nozzle (8) and the air nozzle (9) pass through the drill pipe casing (5), the lower end of the water nozzle (8) is connected to the water nozzle joint (48), and the lower end of the air nozzle (9) is connected to the ventilation nozzle joint (49); The lower end plate (52) of the drill pipe casing (5) abuts against the second upper sealing plate (44) of the second mixing chamber (4), and the screws pass through the casing end plate holes (50) and the second end plate holes (40) and are tightened with nuts.

2. The high-pressure rotary spraying device for construction according to claim 1, characterized in that: The positions of the two joint installation holes of the second mixing chamber (4) are changed to the second inner sleeve (42) and are respectively installed with a water nozzle elbow (46) and an air nozzle elbow (47). The water nozzle elbow (46) and the air nozzle elbow (47) are communicated with the second mixing chamber. The lower end of the water nozzle (8) is connected to the water nozzle elbow (46), and the lower end of the air nozzle (9) is connected to the air nozzle elbow (47).

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