Rotary jet grouting pile

Abstract

The utility model discloses a jet grouting pile which comprises a drill rod installed on a power device, a drill bit is arranged on the drill rod, an inner groove is formed in the drill rod, a plurality of guniting holes are formed in the side wall of the drill rod, the guniting holes are communicated with the inner groove, an upper partition plate is connected to the inner side wall of the inner groove, a first connecting hole is formed in the upper partition plate, and a second connecting hole is formed in the lower partition plate. The side wall of the first connecting hole is connected with a slurry conveying pipe; the driving mechanism drives the bottom scraping rod to rotate, so that the side scraping rod, the top scraping rod and the stirring rod synchronously rotate, the bottom scraping rod, the side scraping rod and the top scraping rod conduct scraping operation on the bottom end, the side wall and the top end of the inner cavity correspondingly, all-directional surface scraping is conducted on the inner cavity, residual cement grout is scraped down and falls onto the guide plate, and the cement grout is scraped off and falls into the stirring rod. Water is input into the slurry conveying pipe, and the residual cement slurry can slide to the slurry spraying hole along the guide plate in cooperation with impact of water flow, so that the effect of scraping and cleaning the residual cement slurry is achieved.

Description

Technical Field

[0001] This utility model relates to the field of engineering devices, and in particular to a jet grouting pile. Background Technology

[0002] Ground settlement is a common occurrence during port construction projects, posing significant construction risks. Therefore, high-pressure jet grouting piles are typically used to reinforce the foundation, improving its bearing capacity and ensuring port construction safety.

[0003] High-pressure jet grouting piles are constructed by drilling a jet grouting pipe and nozzle to a predetermined position in the soil layer using a drilling rig, and then using high-pressure equipment to inject cement grout into the soil layer at high pressure and mix it with the soil. Existing high-pressure jet grouting piles include a drill rod connected to a power unit and a drill bit on the drill rod. The drill rod contains a grout delivery pipe and a grout injection hole. The grout injection hole and the grout delivery pipe are connected through an inner cavity inside the drill rod or drill bit. When cement grout is introduced into the inner cavity, it easily adheres to the side wall of the inner cavity. After prolonged grouting operations, cement grout easily adheres to the inner cavity, affecting the next injection of cement grout. In fact, excess cement grout can easily clog the port of the grout injection hole, causing blockage. While flushing the inner cavity by supplying water through the grout delivery pipe can flush the side wall near the port of the grout delivery pipe, cement grout will still remain in the inner cavity. Therefore, a jet grouting pile is needed to facilitate the scraping off of cement grout adhering to the inner cavity and to facilitate flushing treatment of the cement grout adhering to the inner cavity. Utility Model Content

[0004] The purpose of this utility model is to provide a jet grouting pile that overcomes the inconvenience of cleaning the inner cavity of the drill pipe.

[0005] The technical solution to achieve the above objective is: a jet grouting pile, comprising a drill rod mounted on a power device, a drill bit mounted on the drill rod, an inner groove inside the drill rod, a plurality of grouting holes on the side wall of the drill rod, the grouting holes communicating with the inner groove, an upper partition plate connected to the inner side wall of the inner groove, a first connecting hole formed in the upper partition plate, a grout delivery pipe connected to the side wall of the first connecting hole, a lower partition plate connected to the end of the side wall of the inner groove, an inner cavity formed between the upper and lower partition plates, a second connecting hole formed on the side wall of the lower partition plate, a driving mechanism provided at the bottom of the inner groove, and a scraping mechanism provided on the driving mechanism.

[0006] Preferably, the first connecting hole and the second connecting hole are aligned vertically.

[0007] Preferably, the top end of the lower partition plate is flush with the bottom end of the spray hole.

[0008] Preferably, the drive mechanism includes a motor, a rotating shaft, and a mounting block. The inner bottom end of the inner groove is connected to the motor, the output end of the motor is connected to the rotating shaft, the side wall of the rotating shaft passes through the second connecting hole, and the top end of the rotating shaft is connected to the mounting block.

[0009] Preferably, a sealing gasket is provided at the connection between the rotating shaft and the second connecting hole.

[0010] Preferably, a guide block is connected to the top of the mounting block, and the guide block is located directly below the bottom outlet of the slurry pipe.

[0011] Preferably, the scraping mechanism includes a bottom scraper, a side scraper, a top scraper, a stirring rod, a guide plate, and a central hole. The top of the lower partition is connected to the guide plate, and the side wall of the guide plate has a central hole. The rotating shaft passes through the central hole, and a sealing gasket is fitted at the connection between the central hole and the rotating shaft. The side wall of the mounting block is connected to the bottom scraper, one end of the bottom scraper is connected to the side scraper, the top of the side scraper is connected to the top scraper, and the bottom end of the top scraper away from the side scraper is connected to the stirring rod. The bottom end of the stirring rod is connected to the top of the bottom scraper near the top of the mounting block.

[0012] Preferably, the scraping mechanism is located inside the inner cavity, the guide plate and the guide block are both conical, the bottom end of the guide plate is aligned with the bottom end of the spray hole, the bottom scraper is parallel to the generatrix of the guide plate, the side wall of the bottom scraper is in contact with the outer side wall of the guide plate, the side wall of the side scraper is in contact with the inner groove side wall inside the inner cavity, the side wall of the top scraper is in contact with the bottom end of the upper partition plate, and one end of the top scraper is flush with the outer side of the grout delivery pipe.

[0013] The beneficial effects of this utility model are:

[0014] 1) The drive mechanism drives the bottom scraper to rotate, which in turn causes the side scraper, top scraper, and mixing rod to rotate synchronously. The bottom scraper, side scraper, and top scraper scrape the bottom, side wall, and top of the inner cavity, respectively, thus performing a comprehensive surface scraping of the inner cavity. This causes the residual cement slurry to fall off and onto the guide plate. Water is then introduced into the slurry delivery pipe, and the impact of the water flow allows the residual cement slurry to slide along the guide plate towards the spray hole, achieving the effect of scraping and cleaning the residual cement slurry.

[0015] 2) When conveying cement slurry in the inner cavity, the rotating bottom scraper, side scraper, top scraper and mixing rod can agitate the cement slurry a second time to prevent the cement slurry from solidifying in the inner cavity. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2This is a cross-sectional top view of the structure of this utility model;

[0018] Figure 3 This is a cross-sectional bottom view of the structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the stirring rod structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the guide plate structure of this utility model.

[0021] Icon labels:

[0022] 1. Drill rod; 2. Inner groove; 3. Grouting hole; 4. Grout delivery pipe; 5. Upper partition plate; 6. First connecting hole; 7. Lower partition plate; 8. Second connecting hole; 9. Drive mechanism; 901. Motor; 902. Rotating shaft; 903. Mounting block; 10. Scraping mechanism; 1001. Bottom scraper; 1002. Side scraper; 1003. Top scraper; 1004. Stirring rod; 1005. Guide plate; 1006. Center hole; 11. Guide block. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Reference Appendix Figure 1 To be continued Figure 5 A jet grouting pile includes a drill rod 1 mounted on a power unit, a drill bit mounted on the drill rod 1, an inner groove 2 inside the drill rod 1, and multiple grouting holes 3 on the side wall of the drill rod 1, which communicate with the inner groove 2. An upper partition plate 5 is connected to the inner side wall of the inner groove 2, and a first connecting hole 6 is opened in the upper partition plate 5. A grout delivery pipe 4 is connected to the side wall of the first connecting hole 6. A lower partition plate 7 is connected to the end of the side wall of the inner groove 2, and the top of the lower partition plate 7 is flush with the bottom of the grouting hole 3. The space between the upper partition plate 5 and the lower partition plate 7 is an inner cavity. A second connecting hole 8 is opened in the side wall of the lower partition plate 7, and the first connecting hole 6 and the second connecting hole 8 are aligned vertically. A driving mechanism 9 is provided at the bottom of the inner groove 2, and a scraping mechanism 10 is provided on the driving mechanism 9.

[0026] Cement grout is fed into the grouting pipe 4, which then outputs the cement grout into the inner cavity. The grout then flows from the inner cavity to the spray hole 3, allowing the cement grout to be injected into the ground. The cement grout is then mixed with the soil through stirring, thereby compacting the foundation.

[0027] Reference Appendix Figure 2 To be continued Figure 5 The drive mechanism 9 includes a motor 901, a rotating shaft 902, and a mounting block 903. The inner bottom end of the inner groove 2 is connected to the motor 901, the output end of the motor 901 is connected to the rotating shaft 902, the side wall of the rotating shaft 902 passes through the second connecting hole 8, the top end of the rotating shaft 902 is connected to the mounting block 903, a sealing gasket is provided at the connection between the rotating shaft 902 and the second connecting hole 8, and the top end of the mounting block 903 is connected to the guide block 11, which is located directly below the bottom outlet of the slurry pipe 4.

[0028] The scraping mechanism 10 includes a bottom scraper 1001, a side scraper 1002, a top scraper 1003, a stirring rod 1004, a guide plate 1005, and a central hole 1006. The top of the lower partition plate 7 is connected to the guide plate 1005. The side wall of the guide plate 1005 has a central hole 1006. The rotating shaft 902 passes through the central hole 1006. A sealing gasket is fitted at the connection between the central hole 1006 and the rotating shaft 902. The side wall of the mounting block 903 is connected to the bottom scraper 1001. One end of the bottom scraper 1001 is connected to the side scraper 1002. The top of the side scraper 1002 is connected to the top scraper 1003. The bottom end of the top scraper 1003 away from the side scraper 1002 is connected to the stirring rod 1004. The bottom end of the stirring rod 1004 is connected to the top of the bottom scraper 1001 near the mounting block 903.

[0029] The scraping mechanism 10 is located inside the inner cavity. The guide plate 1005 and the guide block 11 are both conical. The bottom end of the guide plate 1005 is aligned with the bottom end of the spray hole 3. The bottom scraper 1001 is parallel to the generatrix of the guide plate 1005. The side wall of the bottom scraper 1001 is in contact with the outer side wall of the guide plate 1005. The side wall of the side scraper 1002 is in contact with the side wall of the inner groove 2 inside the inner cavity. The side wall of the top scraper 1003 is in contact with the bottom end of the upper partition plate 5. One end of the top scraper 1003 is flush with the outer side of the grout delivery pipe 4.

[0030] When the inner cavity needs cleaning, the motor 901 is started. The motor 901 drives the rotating shaft 902 to rotate, which in turn drives the mounting block 903 to rotate. The mounting block 903 then drives the bottom scraper 1001 to rotate. The bottom scraper 1001, side scraper 1002, top scraper 1003, and stirring rod 1004 are sequentially connected to each other, forming a whole. This allows the side scraper 1002, top scraper 1003, and stirring rod 1004 to rotate synchronously. The bottom scraper 1001 scrapes the cement slurry off the surface of the guide plate 1005, while the side scraper 1002 scrapes the cement slurry off the surface of the inner tank 2 in the inner cavity. The top scraper 1003 scrapes down the residual cement slurry at the bottom of the upper partition 5, thereby scraping the surface of the inner cavity from all directions. The residual cement slurry can fall onto the guide plate 1005. Using the inclined surface of the guide plate 1005 and the water input into the slurry delivery pipe 4, the residual cement slurry can slide along the guide plate 1005 to the spray hole 3 and then be discharged, achieving the effect of cleaning the residual cement slurry. In addition, when the cement slurry is transported in the inner cavity, the rotating bottom scraper 1001, side scraper 1002, top scraper 1003 and stirring rod 1004 can agitate the cement slurry a second time to prevent the cement slurry from solidifying in the inner cavity.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A jet grouting pile, comprising a drill rod (1) mounted on a power unit, a drill bit disposed on the drill rod (1), an inner groove (2) disposed inside the drill rod (1), and a plurality of grouting holes (3) disposed on the side wall of the drill rod (1), the grouting holes (3) communicating with the inner groove (2), characterized in that, The inner wall of the inner groove (2) is connected to an upper partition plate (5), the upper partition plate (5) has a first connecting hole (6), the side wall of the first connecting hole (6) is connected to a slurry conveying pipe (4), the side wall of the inner groove (2) is connected to a lower partition plate (7), the space between the upper partition plate (5) and the lower partition plate (7) is an inner cavity, the side wall of the lower partition plate (7) has a second connecting hole (8), the bottom of the inner groove (2) is provided with a driving mechanism (9), and a scraping mechanism (10) is provided on the driving mechanism (9).

2. A jet grouting pile according to claim 1, characterized in that, The first connecting hole (6) and the second connecting hole (8) are aligned vertically.

3. A jet grouting pile according to claim 1, characterized in that, The top of the lower partition (7) is flush with the bottom of the spray hole (3).

4. A jet grouting pile according to claim 1, characterized in that, The drive mechanism (9) includes a motor (901), a rotating shaft (902), and a mounting block (903). The inner bottom end of the inner groove (2) is connected to the motor (901), the output end of the motor (901) is connected to the rotating shaft (902), the side wall of the rotating shaft (902) passes through the second connecting hole (8), and the top end of the rotating shaft (902) is connected to the mounting block (903).

5. A jet grouting pile according to claim 4, characterized in that, A sealing gasket is provided at the connection between the rotating shaft (902) and the second connecting hole (8).

6. A jet grouting pile according to claim 4, characterized in that, The top of the mounting block (903) is connected to a guide block (11), which is located directly below the bottom outlet of the slurry pipe (4).

7. A jet grouting pile according to claim 6, characterized in that, The scraping mechanism (10) includes a bottom scraper (1001), a side scraper (1002), a top scraper (1003), a stirring rod (1004), a guide plate (1005), and a central hole (1006). The top of the lower partition plate (7) is connected to the guide plate (1005). The guide plate (1005) has a central hole (1006) on its side wall. The rotating shaft (902) passes through the central hole (1006), and the connection between the central hole (1006) and the rotating shaft (902) is sleeved. A sealing gasket is provided. A bottom scraper (1001) is connected to the side wall of the mounting block (903). A side scraper (1002) is connected to the bottom end of one end of the bottom scraper (1001). A top scraper (1003) is connected to the top end of the side scraper (1002). A stirring rod (1004) is connected to the bottom end of the top scraper (1003) away from the side scraper (1002). The bottom end of the stirring rod (1004) is connected to the top end of the bottom scraper (1001) near the top end of the mounting block (903).

8. A jet grouting pile according to claim 7, characterized in that, The scraping mechanism (10) is located inside the cavity. The guide plate (1005) and the guide block (11) are both conical. The bottom end of the guide plate (1005) is aligned with the bottom end of the spray hole (3). The bottom scraper (1001) is parallel to the generatrix of the guide plate (1005). The side wall of the bottom scraper (1001) is in contact with the outer side wall of the guide plate (1005). The side wall of the side scraper (1002) is in contact with the side wall of the inner groove (2) inside the cavity. The side wall of the top scraper (1003) is in contact with the bottom end of the upper partition plate (5). One end of the top scraper (1003) is flush with the outer side of the grout delivery pipe (4).

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