High-pressure jet grouting pile structure

Abstract

The utility model provides a high-pressure jet grouting pile structure, and relates to the field of high-pressure jet grouting pile auxiliary structures. The anti-blocking device comprises a drill rod and a drill bit, the drill bit is fixed to the drill rod, a slurry conveying pipe is arranged in the drill rod, a nozzle is formed in the drill rod in a penetrating mode, a slurry outlet pipe is arranged between the nozzle and the slurry conveying pipe in a communicating mode, and an anti-blocking assembly used for protecting the nozzle is arranged between the slurry conveying pipe and the drill rod. The method has the effect that the construction progress is not easily affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-pressure rotary jet pile auxiliary structure, and particularly relates to a high-pressure rotary jet pile structure. BACKGROUND

[0002] The high-pressure rotary jet pile, also known as jet grouting method or rotary jet method, is a kind of ground reinforcement technology.

[0003] The construction principle of the high-pressure rotary jet pile is to drill the rotary jet grouting pipe and the nozzle into the pile bottom at the design elevation by using a drilling machine, and then to make the pre-prepared slurry obtain great energy through a high-pressure generating device, and then to be jetted out from the nozzle at the edge of the grouting pipe at high speed. In this way, a liquid flow with high energy concentration can be formed to directly destroy the soil. During the jetting process, the drill rod is rotated and lifted to ensure that the slurry is fully mixed with the soil. Finally, a columnar consolidated body with a certain diameter is formed in the soil to achieve the purpose of reinforcing the foundation.

[0004] At present, in the related art, a Chinese patent with the authorization announcement number CN208749307U discloses a drill rod of a high-pressure rotary jet pile, which comprises a drill rod body. A nozzle is arranged at the lower part of the drill rod body close to the drill bit. A slurry conveying pipe is arranged in the hollow rod cavity of the drill rod body. The bottom end of the slurry conveying pipe is communicated with the nozzle. A protective sleeve is sleeved on the outer sleeve of the drill rod body. The protective sleeve blocks the nozzle when the drill rod is drilled and is offset from the nozzle when the drill rod is pulled up. The drill rod body is further provided with a limiting device for limiting the upper limit position and the lower limit position of the protective sleeve. The drill rod can prevent the nozzle from being blocked during the drilling process of the drill rod.

[0005] However, in the above-mentioned technology, the protective sleeve is arranged on the outer sidewall of the drill rod. Such an arrangement will increase the outer diameter of the drill rod, thereby causing difficulty in the process of deepening into the pile hole, and affecting the construction progress. CONTENT OF THE UTILITY MODEL

[0006] In order to improve the problems existing in the above-mentioned technology, the present application provides a high-pressure rotary jet pile structure.

[0007] The present application provides a high-pressure rotary jet pile structure, which adopts the following technical scheme:

[0008] The high-pressure rotary jet pile structure comprises a drill rod and a drill bit. The drill bit is fixed on the drill rod. A slurry conveying pipe is arranged in the drill rod. A nozzle is arranged through the drill rod. A slurry outlet pipe is arranged in communication between the nozzle and the slurry conveying pipe. A block prevention assembly for preventing the nozzle is arranged between the slurry conveying pipe and the drill rod.

[0009] The block prevention assembly comprises a pressing part, a transmission part and a block prevention part. The pressing part is arranged on the slurry conveying pipe. The block prevention part is arranged on the drill rod. The transmission part is arranged between the pressing part and the block prevention part.

[0010] By adopting the technical scheme, when the drill rod only drills a hole but does not spray, the anti-blocking assembly can shield the nozzle to prevent the soil from entering the nozzle, thereby ensuring that the subsequent nozzle can smoothly spray the slurry; and the anti-blocking assembly does not increase the outer diameter of the drill rod, thereby not easily affecting the construction process.

[0011] Optionally, the pressing part comprises a pressing block, a pressing rod and a pressing spring, the pressing block is arranged in the slurry conveying pipe, the pressing spring is fixed between the pressing block and the inner wall of the slurry conveying pipe, one end of the pressing rod is fixed with the pressing block, and the other end of the pressing rod penetrates through the slurry conveying pipe and is connected with the transmission part.

[0012] By adopting the technical scheme, when the drill rod only drills a hole but does not spray, the anti-blocking assembly can shield the nozzle to prevent the soil from entering the nozzle, thereby ensuring that the subsequent nozzle can smoothly spray the slurry; and the anti-blocking assembly does not increase the outer diameter of the drill rod, thereby not easily affecting the construction process.

[0013] Optionally, the transmission part comprises a rack, a transmission shaft, a transmission gear, a driving gear and a driven gear, the rack is fixed with the pressing rod, the transmission shaft is rotatably arranged in the slurry conveying pipe, the transmission gear and the driving gear are coaxially arranged on the transmission shaft, the rack is engaged with the transmission gear, the driven gear is connected with the anti-blocking part, and the driving gear is engaged with the driven gear.

[0014] By adopting the technical scheme, in the process of the pressing block moving downward, the rack drives the transmission gear to rotate, the rotation of the transmission gear can in turn drive the transmission shaft, the driving gear and the driven gear to rotate, and the rotation of the driven gear drives the anti-blocking part to open the nozzle.

[0015] Optionally, the anti-blocking part comprises a screw rod and an anti-blocking plate, the drill rod is provided with an anti-blocking groove in communication with the nozzle, the inner wall of the anti-blocking groove is provided with a gap hole, one end of the anti-blocking plate is arranged in the anti-blocking groove, the other end of the anti-blocking plate is arranged in the gap hole, the anti-blocking plate is provided with a threaded hole, one end of the screw rod is rotatably arranged in the gap hole, the other end of the screw rod is threadedly connected in the threaded hole, and the driven gear is coaxially arranged on the screw rod.

[0016] By adopting the technical scheme, when the driven gear rotates, the screw rod rotates to drive the anti-blocking plate to descend, thereby removing the shielding of the nozzle.

[0017] Optionally, a rubber sleeve is fixedly arranged on the pressing block.

[0018] By adopting the technical scheme, the rubber sleeve is used to improve the sealing between the pressing block and the inner wall of the slurry conveying pipe, so that the concrete slurry is not easily dropped below the pressing block.

[0019] Optionally, the drill rod is provided with an intermediate assembly for connecting the drill rod with a device for driving the drill rod to rotate.

[0020] By adopting the technical scheme, when the drill rod works, the intermediate assembly can rotate the vibration in the horizontal direction of the drill rod, thereby ensuring the stability of the connection between the drill rod and the driving device.

[0021] Optionally, the intermediate assembly comprises a mounting pipe, a connecting rod, a connecting barrel and a buffer spring, the mounting pipe is arranged on the drill rod, the connecting barrel is fixed on the mounting pipe, one end of the connecting rod is fixed with the drill rod and the other end is arranged in the connecting barrel, and the buffer spring is fixed between the connecting rod and the connecting barrel.

[0022] By adopting the technical scheme, when the drill rod is vibrated in the horizontal direction, the buffer spring can buffer the vibration, thereby ensuring the stability of the connection between the drill rod and the driving device.

[0023] Optionally, the intermediate assembly further comprises a limiting block, a limiting groove is arranged in the inner wall of the connecting barrel, the limiting block is slidingly arranged in the limiting groove, and the limiting block is fixedly connected with the connecting rod.

[0024] By adopting the technical scheme, the limiting block can limit the connecting rod to prevent the connecting rod from moving too far and affecting the drilling.

[0025] In summary, the present application has at least one of the following beneficial effects:

[0026] 1. When the drill rod only drills holes and does not rotate and spray, the anti-blocking assembly can shield the nozzle to prevent the soil from entering the nozzle, thereby ensuring that the subsequent nozzle can smoothly spray mortar; and the anti-blocking assembly does not increase the outer diameter of the drill rod, thereby not easily affecting the construction process.

[0027] 2. When the driven gear rotates, the screw rod will rotate to drive the anti-blocking plate to descend, thereby removing the shielding of the nozzle.

[0028] 3. The rubber sleeve is used to improve the sealing between the pressing block and the inner wall of the mortar conveying pipe, so that the concrete mortar is not easy to fall below the pressing block. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view according to an embodiment of the present application;

[0030] Figure 2 is a schematic top view of Figure 1 ;

[0031] Figure 3 is a sectional view along Figure 2a schematic cross-sectional view taken along the section line A-A in FIG. 1;

[0032] Figure 4 is Figure 3 a schematic partial enlarged view of part B in FIG. 1;

[0033] Figure 5 is Figure 3 a schematic partial enlarged view of part C in FIG. 1.

[0034] In the figure: 1, drill rod; 11, slurry conveying pipe; 12, nozzle; 13, slurry outlet pipe; 14, anti-blocking groove; 15, clearance hole; 2, pressing part; 21, pressing block; 211, rubber sleeve; 22, pressing rod; 23, pressing spring; 3, transmission part; 31, rack; 32, transmission shaft; 33, transmission gear; 34, driving gear; 35, driven gear; 4, anti-blocking part; 41, screw rod; 42, anti-blocking plate; 421, threaded hole; 5, intermediate assembly; 51, mounting pipe; 52, connecting rod; 511, connecting cylinder; 521, limiting groove; 53, buffer spring; 54, limiting block. DETAILED DESCRIPTION

[0035] The application provides a high-pressure rotary jet grouting pile structure.

[0036] Referring to Figure 1 , Figure 2 and Figure 3 , the high-pressure rotary jet grouting pile structure comprises a drill rod 1 and a drill bit, the drill bit is fixedly installed at the end of the drill rod 1; a slurry conveying pipe 11 for conveying concrete slurry is arranged in the drill rod 1, a nozzle 12 is arranged through the side wall of the end of the drill rod 1 close to the drill bit, two nozzles 12 are arranged in the embodiment of the application, the actual number of nozzles 12 can be set according to requirements, and a slurry outlet pipe 13 is arranged in communication between the nozzle 12 and the slurry conveying pipe 11; in construction, the concrete slurry is conveyed by the slurry conveying pipe 11 at high pressure, the concrete slurry is sprayed out of the nozzle 12, so that the soil is cut, and the concrete slurry can be fully mixed with the soil.

[0037] Referring to Figure 3 and Figure 4 , an anti-blocking assembly is arranged between the slurry conveying pipe 11 and the drill rod 1, when the drill rod 1 is only drilled but not rotary jet grouted, the anti-blocking assembly can shield the nozzle 12, so as to prevent the soil from entering the nozzle 12, thereby ensuring that the nozzle 12 can smoothly spray slurry in the subsequent process; and the anti-blocking assembly does not increase the outer diameter of the drill rod 1, so as not to easily affect the construction process.

[0038] Referring to Figure 3 and Figure 4 , the anti-blocking assembly comprises a pressing part 2, a transmission part 3 and an anti-blocking part 4.

[0039] Referring to Figure 3 and Figure 4, the pressing part 2 comprises a pressing block 21, a pressing rod 22 and a pressing spring 23, and the end of the slurry conveying pipe 11 close to the drill bit is closed in the embodiment. The pressing block 21 is arranged in the slurry conveying pipe 11 and can move along the axial direction of the slurry conveying pipe 11; the pressing spring 23 is fixed between the pressing block 21 and the inner bottom wall of the slurry conveying pipe 11, and is used for supporting the pressing block 21. In the embodiment, the top end of the pressing block 21 is higher than the height of the connection between the slurry outlet pipe 13 and the slurry conveying pipe 11 when the concrete slurry is not conveyed.

[0040] Referring to Figure 3 and Figure 4 , one end of the pressing rod 22 is fixedly connected with the bottom wall of the pressing block 21, and the other end penetrates through the inner bottom wall of the slurry conveying pipe 11 and extends outward and is connected with the transmission part 3. When the concrete slurry is conveyed, the concrete slurry needs to press down the pressing block 21 first, until the pressing block 21 no longer blocks the slurry outlet pipe 13, and then the concrete slurry can enter the slurry outlet pipe 13; in the process of moving down of the pressing block 21, the transmission part 3 will operate, so as to drive the anti-blocking part 4 to open the nozzle 12, so as to no longer block the nozzle 12, so that the concrete slurry can be smoothly sprayed from the nozzle 12.

[0041] Referring to Figure 3 and Figure 4 , further, the rubber sleeve 211 is fixedly sleeved on the peripheral wall of the pressing block 21, and is used for improving the sealing performance between the pressing block 21 and the inner wall of the slurry conveying pipe 11, so that the concrete slurry is not easy to fall below the pressing block 21.

[0042] Referring to Figure 3 and Figure 4 , the transmission part 3 comprises a rack 31, a transmission shaft 32, a transmission gear 33, a driving gear 34 and a driven gear 35, and one end of the pressing rod 22 away from the pressing block 21 is fixedly connected with the rack 31. The transmission shaft 32 is horizontally rotatably installed in the drill pipe 1 and is located below the slurry conveying pipe 11; the transmission gear 33 and the driving gear 34 are coaxially sleeved on the transmission shaft 32, and the rack 31 is engaged with the transmission gear 33.

[0043] Referring to Figure 3 and Figure 4 , the driven gear 35 is installed on the anti-blocking part 4, and the driving gear 34 is engaged with the driven gear 35. In the process of moving down of the pressing block 21, the rack 31 drives the transmission gear 33 to rotate, the rotation of the transmission gear 33 can in turn drive the transmission shaft 32, the driving gear 34 and the driven gear 35 to rotate, and the rotation of the driven gear 35 drives the anti-blocking part 4 to open the nozzle 12.

[0044] Referring to Figure 3 and Figure 4, the anti-blocking part 4 comprises a screw rod 41 and an anti-blocking plate 42, the outer side wall of the drill rod 1 is provided with an anti-blocking groove 14, and the anti-blocking groove 14 is communicated with the nozzle 12. The inner bottom wall of the anti-blocking groove 14 is provided with a clearance hole 15; one end of the anti-blocking plate 42 is arranged in the anti-blocking groove 14, and the other end is arranged in the clearance hole 15, and the anti-blocking plate 42 is used for shielding the nozzle 12, so that the soil is not easy to enter the nozzle 12.

[0045] Referring to Figure 3 and Figure 5 , the bottom wall of the anti-blocking plate 42 is provided with a threaded hole 421, one end of the screw rod 41 is rotatably installed in the clearance hole 15, and the other end is threadedly connected in the threaded hole 421; the driven gear 35 is coaxially sleeved on the screw rod 41, and when the driven gear 35 rotates, the screw rod 41 will rotate to drive the anti-blocking plate 42 to descend, thereby removing the shielding of the nozzle 12.

[0046] Referring to Figure 3 and Figure 5 , further, the end of the drill rod 1 away from the drill bit is provided with an intermediate assembly 5, which is used for connecting the drill rod 1 and a driving device (not shown in the figure) for driving the drill rod 1 to rotate, and when the drill rod 1 works, the intermediate assembly 5 can rotate the vibration of the drill rod 1 in the horizontal direction, thereby ensuring the stability of the connection between the drill rod 1 and the driving device.

[0047] Referring to Figure 3 and Figure 5 , the intermediate assembly 5 comprises an installation pipe 51, a connecting rod 52, a connecting barrel 511 and a buffer spring 53, the installation pipe 51 is sleeved on the drill rod 1, and in actual installation, the installation pipe 51 can be connected with the driving device. The connecting barrel 511 is fixedly arranged on the inner side wall of the installation pipe 51, and in the embodiment of the application, the connecting barrel 511 is provided with four connecting barrels, which are uniformly distributed along the circumferential direction of the installation pipe 51.

[0048] Referring to Figure 3 and Figure 5 , one end of the connecting rod 52 is arranged in the connecting barrel 511, and the other end is fixedly connected with the drill rod 1; the buffer spring 53 is fixed between the connecting rod 52 and the barrel bottom of the connecting barrel 511, and when the drill rod 1 is vibrated in the horizontal direction, the buffer spring 53 can buffer the vibration, thereby ensuring the stability of the connection between the drill rod 1 and the driving device.

[0049] Referring to ​ and ​ , further, the intermediate assembly 5 further comprises a limiting block 54, the inner wall of the connecting barrel 511 is provided with a limiting groove 521 in the axial direction, the limiting block 54 is slidably arranged in the limiting groove 521, and the limiting block 54 is fixedly connected with the connecting rod 52. The limiting block 54 can limit the connecting rod 52 to prevent the connecting rod 52 from moving too far and affecting the drilling.

[0050] The working principle of the high-pressure jet pile structure of the present application in use is as follows: in the process of the downward movement of the pressing block 21, the rack 31 drives the transmission gear 33 to rotate, and the rotation of the transmission gear 33 can in turn drive the transmission shaft 32, the driving gear 34 and the driven gear 35 to rotate; when the driven gear 35 rotates, the screw rod 41 will rotate to drive the anti-blocking plate 42 to descend, thereby removing the shielding of the nozzle 12.

[0051] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: all equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high pressure jet grouting pile structure, characterized in that, The utility model relates to a drilling rod (1) and drill bit, the drill bit is fixed on the drilling rod (1), the drilling rod (1) is provided with the slurry pipeline (11) in, the drilling rod (1) is set up the nozzle (12) through, and the nozzle (12) is communicated with the slurry pipeline (11) and is provided with the slurry outlet pipe (13) between, the slurry pipeline (11) is provided with the anti -blocking assembly for preventing the nozzle (12) between with the drilling rod (1). The anti -blocking assembly includes: pressure moves department (2), transmission part (3) and anti -blocking part (4), the pressure moves department (2) is set up on the slurry pipeline (11), the anti -blocking part (4) is set up on the drilling rod (1), the transmission part (3) is set up between the pressure moves department (2) with the anti -blocking part (4). The pressure moves department (2) includes: pressure moves the block (21), pressure moves the rod (22) and pressure moves the spring (23), the pressure moves the block (21) is set up in the slurry pipeline (11), the pressure moves the spring (23) is fixed between the pressure moves the block (21) with the inner wall of slurry pipeline (11), one end of pressure moves the rod (22) with pressure moves the block (21) fixed, the other end is penetrated slurry pipeline (11) and is connected with the transmission part (3).

2. The high-pressure jet grouting pile structure according to claim 1, characterized in that, The transmission part (3) includes: rack (31), transmission shaft (32), transmission gear (33), driving gear (34) and driven gear (35), the rack (31) is fixed with the pressure moves the rod (22), the transmission shaft (32) is rotatably installed in the slurry pipeline (11), the transmission gear (33) and the driving gear (34) are coaxially sleeved on the transmission shaft (32), and the rack (31) is engaged with the transmission gear (33), the driven gear (35) is connected with the anti -blocking part (4), and the driving gear (34) is engaged with the driven gear (35).

3. The high-pressure jet grouting pile structure according to claim 2, characterized in that, The anti -blocking part (4) includes: screw rod (41) and anti -blocking plate (42), the drilling rod (1) is set up with the anti -blocking groove (14) of communication with the nozzle (12), the inner wall of the anti -blocking groove (14) is set up with the let -hole (15), one end of the anti -blocking plate (42) is set up in the anti -blocking groove (14), the other end is set up in the let -hole (15), and the anti -blocking plate (42) is set up with the threaded hole (421), one end of the screw rod (41) is rotatably installed in the let -hole (15), the other end is screw -threaded in the threaded hole (421), and the driven gear (35) is coaxially sleeved on the screw rod (41).

4. The high-pressure jet grouting pile structure according to claim 3, characterized in that, The pressure moves the block (21) is fixed with the rubber sleeve (211) of sleeve.

5. The high-pressure jet grouting pile structure according to claim 2, characterized in that, The drilling rod (1) is provided with the intermediate assembly (5) for connecting the drilling rod (1) with the device of driving the drilling rod (1) rotation.

6. The high-pressure jet grouting pile structure according to claim 1, wherein, ​ 7. The high-pressure jet grouting pile structure according to claim 6, characterized in that, The intermediate assembly (5) comprises a mounting pipe (51), a connecting rod (52), a connecting cylinder (511) and a buffer spring (53), the mounting pipe (51) is arranged on the drill pipe (1), the connecting cylinder (511) is fixed on the mounting pipe (51), one end of the connecting rod (52) is fixed with the drill pipe (1) and the other end is arranged in the connecting cylinder (511), and the buffer spring (53) is fixed between the connecting rod (52) and the connecting cylinder (511).

8. The high-pressure jet grouting pile structure according to claim 7, characterized in that, The intermediate assembly (5) further comprises a limiting block (54), an inner wall of the connecting cylinder (511) is provided with a limiting groove (521), and the limiting block (54) is slidingly arranged in the limiting groove (521) and fixedly connected with the connecting rod (52).

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