High-quality pile-forming and slurry-rising environment-friendly utilization construction device for high-pressure jet grouting pile
By installing grouting pipes, cutting blades, and grouting heads in high-pressure jet grouting piles, combined with grouting pumps and screening boxes, the problems of grouting pipes lacking grouting structures and soil cutting were solved, achieving high-strength molding of concrete columns and effective treatment of grout, thus improving construction quality and material utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN DEYU CONSTR CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-19
AI Technical Summary
In existing high-pressure jet grouting pile technology, the grouting pipe lacks a grouting structure and a soil cutting structure, resulting in insufficient strength of the concrete column and inability to achieve adequate mixing.
The system employs grouting pipes and grouting drill bits, equipped with cutting blades and main and auxiliary grouting heads. The drilling rig drives the grouting drill bit to rotate, drilling holes in the soil and uniformly spraying and mixing grout. Combined with a grout pump and a negative pressure collection hood, the grout is recovered. The flocculated structure is broken up using a drive motor and a spiral conveyor, and the grout is then processed by vibrating screening in a screening box.
It improved the forming strength of concrete columns, achieved uniform spraying and thorough mixing of grout, reduced the risk of grout flocculation, and improved material utilization and construction efficiency.
Smart Images
Figure CN224259345U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of foundation treatment technology in civil engineering, and in particular to a high-pressure jet grouting pile high-quality pile formation and grout leakage environmentally friendly utilization construction device. Background Technology
[0002] Since its introduction to my country in the 1970s, high-pressure jet grouting technology has become one of the mainstream construction methods for treating soft soil foundations. In recent years, with the acceleration of urbanization and the surge in demand for underground space development, the annual construction volume of jet grouting piles has exceeded 80 million linear meters. The industry standard JGJ / T213-2010 raised the minimum standard for pile strength to above 2 MPa, while environmental regulations tightened the limit on suspended solids concentration in construction waste slurry emissions to below 150 mg / L. Currently, the mainstream equipment still uses a triple-tube jetting process, which uses 40-50 MPa high-pressure cement slurry to cut the soil and form a reinforced body. However, in actual projects, the pile diameter deviation generally exceeds 10%, and the amount of slurry leakage reaches 30%-45% of the total slurry volume.
[0003] Chinese utility model patent CN216713010U discloses a high-pressure jet grouting pile grout collection and monitoring device, including a grouting pipe and a blowout prevention and grout collection container. The grouting pipe is inserted into the grouting hole in the stratum. The blowout prevention and grout collection container is sleeved outside the grouting pipe and fixed to the stratum, and the container seals the inlet of the grouting hole and communicates with it. The blowout prevention and grout collection container is connected to a grout outlet pipe, which is equipped with a flow meter. A connecting pipe runs through the bottom wall of the blowout prevention and grout collection container, sleeved outside the grouting pipe, with its bottom end inserted into the grouting hole. The inner diameter of the connecting pipe is larger than the outer diameter of the grouting pipe. This utility model can effectively and environmentally collect the grout generated during high-pressure jet grouting pile construction and accurately measure the amount of grout.
[0004] In the process of realizing this application, the technology has at least the following problems: during the use of this utility model, the grouting pipe is not equipped with a corresponding spraying structure, and there is no drilling structure that can cut the soil. As a result, the concrete cannot be fully mixed during the entire jet grouting process, which affects the forming strength of the concrete column. Therefore, a high-pressure jet grouting pile high-quality pile forming and grout leakage environmentally friendly utilization construction device is proposed to solve the problems mentioned above. Utility Model Content
[0005] To address the shortcomings of existing technologies, this application provides a high-pressure jet grouting pile high-quality pile formation and grout leakage environmentally friendly construction device, which has the advantage of fully mixing concrete. It solves the problem that existing jet grouting piles do not have corresponding grouting structures on the grouting pipes, nor do they have drilling structures that can cut the soil, resulting in the inability to fully mix the concrete during the entire jet grouting process, which affects the forming strength of the concrete column.
[0006] In summary, this application provides the following technical solution: a high-pressure jet grouting pile with high-quality pile formation, comprising a drilling rig body, a grouting pipe fixedly connected to one side of the drilling rig body, a grouting borehole structure extending into the soil fixedly connected to the bottom end of the grouting pipe, the grouting borehole structure comprising a grouting drill bit fixedly connected to the bottom end of the grouting pipe, a cutting blade fixedly connected to the outer surface of the grouting drill bit, a main grouting head fixedly connected to the outside of the grouting drill bit, and an auxiliary grouting head fixedly connected to the outside of the grouting drill bit between the cutting blade and the main grouting head.
[0007] By adopting the above-mentioned technical solution, this application can deliver grout into the grouting drill bit by setting up grouting pipes and grouting drill bits. At the same time, the drilling rig body can drive the grouting drill bit to rotate and move downwards. The grouting drill bit then drives the cutting blades to rotate, which can achieve drilling treatment of the soil. In addition, by setting up main grouting head and auxiliary grouting head, the grout can be evenly sprayed into the soil. At the same time, when the grouting drill bit moves upwards, it can mix the sprayed concrete grout, thereby improving the strength of the concrete column after it is formed.
[0008] Furthermore, the angle between the auxiliary grouting head and the grouting drill bit is 90°, and the angle between the main grouting head and the grouting drill bit is 15°.
[0009] The beneficial effects of adopting the above-mentioned further solution are: by setting the main spray head and the auxiliary spray head, the grout can be sprayed evenly into the soil, and the soil can also be cut during the spraying process.
[0010] Furthermore, there are two auxiliary grouting heads and three main grouting heads, which are evenly distributed on the outer surface of the grouting drill bit.
[0011] The beneficial effect of adopting the above-mentioned further scheme is that by setting three main spraying heads and two auxiliary spraying heads, a uniform spraying effect can be achieved.
[0012] Furthermore, the grouting pipe is provided with a recovery mechanism for recovering the grout. The recovery mechanism includes a negative pressure collection hood rotatably connected to the outside of the grouting pipe. A grout pump is provided on the side of the grouting pipe away from the drilling rig body. A grout pumping pipe connected to the negative pressure collection hood is fixedly connected to the input end of the grout pumping pipe. A feeding cylinder is provided on the side of the grout pump away from the negative pressure collection hood. A conveying pipe is fixedly connected between the grout pumping pipe and the feeding cylinder.
[0013] The beneficial effects of adopting the above-mentioned further solution are: by setting up a slurry pump and slurry pipeline, and by setting up a negative pressure collection hood, the concrete slurry inside the negative pressure collection hood can be transported to the inside of the feeding cylinder. Then, by driving the screw conveyor rod to rotate through the drive motor, the concrete slurry can be transported while simultaneously breaking down its flocculated structure, which facilitates subsequent slurry treatment.
[0014] Furthermore, both the slurry pump and the feeding cylinder are fixedly connected to the ground, and a fixing frame is fixedly connected between the feeding cylinder and the ground.
[0015] The beneficial effect of adopting the above-mentioned further solution is that it enables the slurry pump and the feed cylinder to be stably supported and installed.
[0016] Furthermore, a drive motor is fixedly connected to one end of the feeding cylinder near the slurry pump, and a spiral conveying rod extending into the inside of the feeding cylinder is fixedly connected to the output shaft of the drive motor. A feeding pipe is fixedly connected to the side of the feeding cylinder away from the conveying pipe.
[0017] The beneficial effect of adopting the above-mentioned further solution is that by driving the screw conveyor rod to rotate by the drive motor, the concrete slurry can be transported at the same time, and the flocculation structure of the slurry can be broken down, which facilitates the subsequent treatment of the slurry.
[0018] Furthermore, a support frame is provided on the side of the feeding cylinder away from the slurry pump, and a screening box extending into the top of the support frame is provided. A screening plate is fixedly connected inside the screening box, and a vibration motor is fixedly connected on the side of the screening box near the support frame.
[0019] The beneficial effect of adopting the above-mentioned further solution is that by setting a vibrating motor, the screening box and screening plate can be driven to vibrate, thereby enabling the concrete slurry to be vibrated and screened.
[0020] Furthermore, a support spring is fixedly connected between the screening box and the support frame, a collection box that communicates with the screening box is slidably connected inside the support frame, and a discharge hopper is fixedly connected to one side of the screening box.
[0021] The beneficial effect of adopting the above-mentioned further solution is that by setting up a collection box, it is convenient to collect the screened concrete slurry and facilitate its subsequent recycling.
[0022] Compared with the prior art, this application provides a high-pressure jet grouting pile high-quality pile formation and grout leakage environmentally friendly construction device, which has the following beneficial effects:
[0023] 1. This high-pressure jet grouting pile high-quality pile formation and grout utilization environmental protection construction device, through the setting of grouting pipes and grouting drill bits, can deliver grout into the grouting drill bit. At the same time, the drilling rig body can drive the grouting drill bit to rotate and move downwards. The grouting drill bit drives the cutting blades to rotate, which can realize the drilling treatment of the soil. At the same time, by setting the main grouting head and auxiliary grouting head, the grout can be evenly sprayed into the soil. Simultaneously, when the grouting drill bit moves upwards, it can mix the sprayed concrete grout, which can improve the strength of the concrete column after it is formed.
[0024] 2. This high-pressure jet grouting pile high-quality pile formation and grout leakage environmentally friendly construction device, by setting up a grout pump and grout pumping pipeline, and by setting up a negative pressure collection hood, can transport the concrete grout inside the negative pressure collection hood to the inside of the feeding cylinder. Then, the drive motor drives the spiral conveying rod to rotate, which can achieve the effect of breaking down the flocculated structure of the concrete grout while transporting it, which facilitates the subsequent treatment of the grout. This solves the problem in the existing jet grouting piles that there is no corresponding spraying structure on the grouting pipe, and no drilling structure that can cut the soil. As a result, the concrete cannot be fully mixed during the entire jet grouting process, which affects the forming strength of the concrete column. Attached Figure Description
[0025] Figure 1 This is a structural sectional view of this application;
[0026] Figure 2 This is a schematic diagram of the grouting drilling structure of this application;
[0027] Figure 3 This application Figure 1 A magnified structural diagram of structure A is shown below;
[0028] Figure 4 This is a three-dimensional structural view of the screening box in this application.
[0029] Explanation of reference numerals in the attached figures:
[0030] 1. Drilling rig body; 2. Grouting pipe; 3. Grouting drill bit; 4. Cutting blade; 5. Main grouting head; 6. Auxiliary grouting head; 7. Negative pressure collection hood; 8. Grouting pump; 9. Grouting pipe; 10. Feeding cylinder; 11. Conveying pipe; 12. Drive motor; 13. Screw conveyor; 14. Feeding pipe; 15. Support frame; 16. Screening box; 17. Screening plate; 18. Vibrating motor; 19. Support spring; 20. Collection box; 21. Discharge hopper. Detailed Implementation
[0031] Please see Figures 1 to 2This embodiment of a high-pressure jet grouting pile with high-quality pile formation includes a drilling rig body 1. A grouting pipe 2 is fixedly connected to one side of the drilling rig body 1. A grouting borehole structure extending into the soil is fixedly connected to the bottom end of the grouting pipe 2. The grouting borehole structure includes a grouting drill bit 3 fixedly connected to the bottom end of the grouting pipe 2. A cutting blade 4 is fixedly connected to the outer surface of the grouting drill bit 3. A main jetting head 5 is fixedly connected to the outside of the grouting drill bit 3. An auxiliary jetting head 6 located between the cutting blade 4 and the main jetting head 5 is fixedly connected to the outside of the grouting drill bit 3.
[0032] The auxiliary grouting head 6 has an angle of 90° with the grouting drill bit 3, and the main grouting head 5 has an angle of 15° with the grouting drill bit 3. There are two auxiliary grouting heads 6 and three main grouting heads 5. The three main grouting heads 5 are evenly distributed on the outer surface of the grouting drill bit 3.
[0033] It should be noted that the main grouting head 5 is made of WC-10Co hard alloy with an outlet diameter of 2.8mm±0.05mm. By setting up the grouting pipe 2 and the grouting drill bit 3, the grout can be delivered into the grouting drill bit 3. At the same time, the drilling rig body 1 can drive the grouting drill bit 3 to rotate and move downward. Then, the grouting drill bit 3 drives the cutting blade 4 to rotate, which can realize the drilling treatment of the soil. At the same time, by setting up the main grouting head 5 and the auxiliary grouting head 6, the grout can be evenly sprayed into the soil.
[0034] It should be noted that by setting the angle of the main jetting head 5 to 15°, a conical diffusion zone can be formed along the drill bit axis. The grout preferentially fills the fractures in front of the borehole, quickly establishing a reinforced core area. At the same time, the small angle design reduces the resistance to grout backflow and improves the efficiency of axial grouting pressure transmission, making it suitable for sealing deep fractures. By setting the angle of the auxiliary jetting head 6 to 90°, a ring-shaped reinforced layer is formed perpendicular to the grouting direction of the drill rod, covering the circumferential fractures and loose strata of the borehole, preventing grout loss on one side. At the same time, the lateral pressure compensates for the formation stress, reducing the risk of borehole collapse and improving the uniformity of reinforcement.
[0035] Please see Figure 1 and Figure 3 In this embodiment, a recovery mechanism capable of recovering grout is provided outside the grouting pipe 2. The recovery mechanism includes a negative pressure collection hood 7 rotatably connected to the outside of the grouting pipe 2. A grout pump 8 is provided on the side of the grouting pipe 2 away from the drilling rig body 1. A grout pumping pipe 9 connected to the negative pressure collection hood 7 is fixedly connected to the input end of the grout pump 8. A feeding cylinder 10 is provided on the side of the grout pump 8 away from the negative pressure collection hood 7. A conveying pipe 11 is fixedly connected between the grout pumping pipe 9 and the feeding cylinder 10.
[0036] The slurry pump 8 and the feeding cylinder 10 are both fixedly connected to the ground, and the feeding cylinder 10 is fixedly connected to the ground by a fixing frame.
[0037] It should be noted that the grouting pump 8 is a screw pump, which transports grout through the sealed cavity between the rotating screw and the stator. It is suitable for high-viscosity media containing solid particles, with low wear and low pulsation. The grouting pump 8 extracts the gushing concrete grout with an air volume of 30 m³ / min. By setting up the grouting pump 8 and the grouting pipe 9, and by setting up the negative pressure collection hood 7, the concrete grout inside the negative pressure collection hood 7 can be transported to the inside of the feeding cylinder 10.
[0038] Please see Figure 1 and Figure 3 In this embodiment, a drive motor 12 is fixedly connected to one end of the feeding cylinder 10 near the slurry pump 8. A spiral conveying rod 13 extending into the inside of the feeding cylinder 10 is fixedly connected to the output shaft of the drive motor 12. A feeding pipe 14 is fixedly connected to the side of the feeding cylinder 10 away from the conveying pipe 11.
[0039] The screw conveyor 13 is made of 304 stainless steel with a pitch of 150mm and an adjustable speed range of 20-60rpm. The screw conveyor 13 is driven by the drive motor 12 to rotate, which can convey concrete slurry while breaking down its flocculated structure, making it easier to process the slurry in the future.
[0040] It should be noted that the "tofu dregs" structure formed by the flocculation of cement particles in the grout can be broken down by high-speed stirring, restoring the fluidity of the grout and enabling the waste grout to regain its grouting performance, thereby improving the utilization rate of the grout and reducing material waste.
[0041] Please see Figure 1 and Figure 4 In this embodiment, a support frame 15 is provided on the side of the feeding cylinder 10 away from the slurry pump 8. A screening box 16 extending into the top of the support frame 15 is provided. A screening plate 17 is fixedly connected inside the screening box 16. A vibration motor 18 is fixedly connected on the side of the screening box 16 near the support frame 15.
[0042] Among them, a support spring 19 is fixedly connected between the screening box 16 and the support frame 15, a collection box 20 connected to the screening box 16 is slidably connected inside the support frame 15, and a discharge hopper 21 is fixedly connected to one side of the screening box 16.
[0043] It should be noted that by setting up the vibration motor 18, the screening box 16 and the screening plate 17 can be driven to vibrate, thereby enabling the concrete slurry to be vibrated and screened. By setting up the collection box 20, the screened concrete slurry can be collected for subsequent recycling.
[0044] It should be noted that the aperture of the screening plate 17 is 0.5mm. By setting the discharge hopper 21, impurities inside the screening box 16 can be discharged.
[0045] It should be noted that during high-pressure jet grouting pile construction, some concrete slurry will mix with foundation soil particles and mud to form slurry overflow. This overflow may contain incompletely solidified aggregates (such as sand and gravel), cement slurry, soil particles, and debris. Vibrating screening can separate larger-diameter aggregates (such as sand and gravel) from the mud and soil particles, enabling aggregate recycling and reducing construction costs. The fine-particle slurry (such as a mixture of cement slurry and clay particles) after screening can be further precipitated or treated to separate a purer cement slurry. The recovered cement slurry can be reinjected into the jet grouting pile construction system for subsequent pile spraying, reducing cement waste and improving material utilization.
[0046] The working principle of the above embodiments is as follows:
[0047] First, the workers rotate the grouting pipe 2 and the grouting drill bit 3 together using the drill body 1. At the same time, the grouting drill bit 3 drills and cuts the soil. When the grouting drill bit 3 enters the soil, it grouts the soil. During the grouting process, some concrete slurry will overflow and enter the negative pressure collection hood 7. At this time, the pump 8 is started to transport the concrete slurry in the negative pressure collection hood 7 to the feeding cylinder 10. At the same time, the drive motor 12 is started to drive the spiral conveyor rod 13 to spirally transport the concrete slurry to the screening box 16. The vibration motor 18 is started to vibrate and screen the concrete slurry.
Claims
1. A high-pressure jet grouting pile with high-quality pile formation, comprising a drilling rig body (1), characterized in that: A grouting pipe (2) is fixedly connected to one side of the drilling rig body (1), and a grouting borehole structure extending into the soil is fixedly connected to the bottom end of the grouting pipe (2). The grouting drilling structure includes a grouting drill bit (3) fixedly connected to the bottom end of the grouting pipe (2), a cutting blade (4) fixedly connected to the outer surface of the grouting drill bit (3), a main grouting head (5) fixedly connected to the outside of the grouting drill bit (3), and an auxiliary grouting head (6) fixedly connected to the outside of the grouting drill bit (3) between the cutting blade (4) and the main grouting head (5).
2. The high-pressure jet grouting pile with high-quality pile formation according to claim 1, characterized in that: The angle between the auxiliary grouting head (6) and the grouting drill bit (3) is 90°, and the angle between the main grouting head (5) and the grouting drill bit (3) is 15°.
3. The high-pressure jet grouting pile with high-quality pile formation according to claim 1, characterized in that: The number of auxiliary grouting heads (6) is two, and the number of main grouting heads (5) is three. The three main grouting heads (5) are evenly distributed on the outer surface of the grouting drill bit (3).
4. A construction device for environmentally friendly utilization of slurry, characterized in that, The high-pressure jet grouting pile with high-quality pile formation according to any one of claims 1 to 3 is provided with a recovery mechanism on the outside of the grouting pipe (2) that can recover the grout. The recycling mechanism includes a negative pressure collection hood (7) rotatably connected to the outside of the grouting pipe (2). A grout pump (8) is provided on the side of the grouting pipe (2) away from the drilling rig body (1). A grouting pipe (9) connected to the negative pressure collection hood (7) is fixedly connected to the input end of the grout pump (8). A feeding cylinder (10) is provided on the side of the grout pump (8) away from the negative pressure collection hood (7). A conveying pipe (11) is fixedly connected between the grouting pipe (9) and the feeding cylinder (10).
5. The grout-recycling environmental protection construction device according to claim 4, characterized in that: The slurry pump (8) and the feeding cylinder (10) are both fixedly connected to the ground, and a fixed frame is fixedly connected between the feeding cylinder (10) and the ground.
6. The grout-recycling environmental protection construction device according to claim 4, characterized in that: The feed cylinder (10) is fixedly connected to a drive motor (12) at one end near the slurry pump (8). A spiral conveying rod (13) extending into the feed cylinder (10) is fixedly connected to the output shaft of the drive motor (12). A feed pipe (14) is fixedly connected to the side of the feed cylinder (10) away from the conveying pipe (11).
7. The grout-recycling environmental protection construction device according to claim 4, characterized in that: A support frame (15) is provided on the side of the feeding cylinder (10) away from the slurry pump (8). A screening box (16) extending into the top of the support frame (15) is provided. A screening plate (17) is fixedly connected inside the screening box (16). A vibration motor (18) is fixedly connected on the side of the screening box (16) near the support frame (15).
8. The grout-recycling environmental protection construction device according to claim 7, characterized in that: A support spring (19) is fixedly connected between the screening box (16) and the support frame (15). A collection box (20) connected to the screening box (16) is slidably connected inside the support frame (15). A discharge hopper (21) is fixedly connected to one side of the screening box (16).