Method for forming high-strength prestressed low-carbon soil-mix pile

Abstract

The present invention relates to the technical field of soil-mix pile forming. Disclosed is a method for forming a high-strength prestressed low-carbon soil-mix pile. S1, subjecting construction spoil and other required raw materials to a specific processing procedure to convert same into a self-compacting grout state with good flowability, and then using drilling equipment to create boreholes having different diameters on a ground according to a specific construction requirement; S2, placing, by means of a grouting device, the previously prepared fluid-state self-compacting grout into each of the drilled boreholes, ensuring that the self-compacting grout completely fills the entire borehole; and S3, inserting low-carbon I-shaped steel into the boreholes after placement of the self-compacting grout. The low-carbon soil-mix pile formed by means of the method has high compressive strength. Moreover, a reinforcement grouting cylinder is used to overcome the problem of vibration damaging or breaking internal parts, while air bubbles within flowable self-compacting grout are eliminated by means of a grouting device, thereby laying a foundation for forming high-strength prestressed low-carbon soil-mix piles by means of the method.

Description

A molding method for high-strength prestressed low-carbon piles Technical Field

[0001] This invention belongs to the field of construction pile forming technology, specifically a forming method for high-strength prestressed low-carbon construction piles. Background Technology

[0002] In construction engineering, pile foundations, as an important type of foundation structure, are widely used in foundation treatment under various complex geological conditions. However, traditional pile foundation forming methods have some inherent problems, especially in terms of prestressing and stability.

[0003] Traditional methods for forming steel piles typically involve a simple drilling process followed by direct insertion of the steel pile into the hole. While this method meets the foundation treatment requirements to some extent, it suffers from significant issues of insufficient prestress and instability. Problems such as irregular hole walls and residual impurities that may occur during drilling, as well as uneven resistance encountered by the steel pile during insertion, can all lead to uneven stress distribution in the pile during subsequent use, thus affecting its prestressing effect.

[0004] Secondly, this method was used to investigate the problem that air bubbles are often difficult to completely eliminate during the pouring of self-compacting grout, which leads to defects inside the pile and reduces its density and uniformity, thus affecting the overall quality of the pile. Therefore, a molding method for high-strength prestressed low-carbon piles is proposed. Summary of the Invention

[0005] To address the problems mentioned in the background art, this invention proposes a molding method for high-strength prestressed low-carbon piles.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A method for forming high-strength prestressed low-carbon concrete piles, comprising the following steps:

[0008] S1. Prepare the construction waste and other required raw materials into a self-compacting slurry with good fluidity. Then, use drilling equipment to drill holes of different diameters on the ground according to specific engineering requirements.

[0009] S2. Using a grouting device, inject the previously prepared fluid self-compacting grout into the drilled holes to ensure that the self-compacting grout can fully fill the entire hole.

[0010] S3. Insert the low-carbon I-beam steel into the borehole after the self-compacting grout is injected. After the flowing self-compacting grout solidifies and hardens, it forms an integral pile with the low-carbon I-beam steel.

[0011] As a further preferred embodiment of this technical solution: the grouting equipment includes a grouting cylinder and a partition circular plate fixedly installed inside the grouting cylinder, and also includes...

[0012] The vibration mechanism is located inside the grouting cylinder. The vibration mechanism includes a rotatable first connecting disc. The first connecting disc is provided with a plurality of fixed blocks arranged in a ring array. Each fixed block is connected to a vibrating rod that can generate vibration to eliminate air bubbles inside the self-compacting grout through a first connecting frame and a hinge seat.

[0013] The hole cleaning mechanism, located above the vibrating mechanism, is used to clean the gravel and soil inside the grout outlet on the grouting cylinder.

[0014] The support mechanism, located on the outer wall of the grouting cylinder, is used to enhance the stability of the grouting cylinder and reduce the risk of damage to the internal components caused by vibration.

[0015] As a further preferred embodiment of this technical solution: the hole cleaning mechanism includes a fixed base and guide tubes arranged in an array on the fixed base. Each guide tube has a hole cleaning rod that can push and tamp out gravel and soil clods. The hole cleaning rod is connected to a transmission angle iron via a connecting shaft.

[0016] The hole-cleaning mechanism also includes a rotatable second connecting disk and multiple drive angle irons arranged in an array on the second connecting disk, which can cooperate with the transmission angle irons and push the transmission angle irons to move via inclined surfaces.

[0017] As a further preferred embodiment of this technical solution: a sealing shell capable of blocking self-compacting slurry is installed above the dividing circular plate.

[0018] As a further preferred embodiment of this technical solution: the support mechanism includes a transmission gear ring rotatably mounted on the outer wall of the grouting cylinder, the transmission gear ring being provided with a plurality of actuating gears arranged in an array, each actuating gear being fixedly mounted with a bidirectional lead screw, the bidirectional lead screw being threadedly connected with two sliders, each slider being rotatably mounted with a connecting rod, and the connecting rod being rotatably mounted with a needle seat, and the needle seat being provided with a needle for inserting into the side wall of the hole.

[0019] As a further preferred embodiment of this technical solution: the grouting equipment further includes a support frame, on which a lifting mechanism is provided. The lifting mechanism includes a No. 3 drive motor and a threaded rod provided at the output end of the No. 3 drive motor. A sliding seat that can slide up and down is threadedly connected to the threaded rod, and the sliding seat is connected to the top of the grouting cylinder through a No. 2 connecting frame.

[0020] As a further preferred embodiment of this technical solution: a slurry conveying pipe for conveying fluid self-compacting slurry is installed through the grouting cylinder, and a conveying pump for pumping in self-compacting slurry is installed at the other end of the slurry conveying pipe.

[0021] As a further preferred embodiment of this technical solution: the fixed base and the guide tube are arranged in a through manner, and a reset spring for pulling the cleaning rod to reset is installed inside the fixed base.

[0022] As a further preferred embodiment of this technical solution: the grouting cylinder is also equipped with multiple grout outlets, and the multiple cleaning rods are arranged in a one-to-one correspondence with the grout outlets.

[0023] As a further preferred embodiment of this technical solution: the grouting cylinder is also equipped with a drive mechanism for driving the first connecting disc and the second connecting disc to rotate.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. In this invention, the low-carbon pile formed by this method has strong compressive strength. Furthermore, by injecting the flowing self-compacting grout into the hole through the grouting equipment, not only can air bubbles be eliminated, but also the grouting cylinder is reinforced during the process of eliminating air bubbles to prevent damage or breakage of internal components caused by vibration. This lays the foundation for forming high-strength prestressed low-carbon piles by this method.

[0026] 2. In this invention, a driving mechanism drives multiple vibrating rods to rotate, and the vibration generated by the vibrating rods fully contacts and eliminates air bubbles inside the self-compacting grout, avoiding the negative impact of air bubbles on the strength of the pile body, improving the density and uniformity of the pile body, thereby ensuring the overall quality of high-strength prestressed low-carbon construction piles.

[0027] 3. In this invention, during the process of the grouting cylinder penetrating into the hole, the hole cleaning mechanism can automatically clean out the gravel or soil inside the grout outlet, avoiding the problem of these debris blocking the self-compacting grout outlet and causing poor flow of fluid grout, ensuring the stability of the grouting rate, and reducing the risk of self-compacting grout solidification caused by long-term grouting, thus providing a strong guarantee for the smooth insertion of low-carbon I-beam steel in the later stage.

[0028] 4. In this invention, the stability of the grouting cylinder during the grouting process is effectively enhanced by the support mechanism. During the process of eliminating air bubbles by the high-frequency vibration of the vibrating mechanism, the stability of the grouting cylinder is enhanced, thereby reducing the risk of damage to components by vibration and extending the service life of the equipment. Attached Figure Description

[0029] Figure 1 is a three-dimensional structural schematic diagram of the injection device in this invention;

[0030] Figure 2 is a partial cross-sectional view of the structure in Figure 1;

[0031] Figure 3 is a schematic diagram of a partial three-dimensional structure in Figure 1;

[0032] Figure 4 is an enlarged view of point A in Figure 3;

[0033] Figure 5 is a schematic diagram of a partial three-dimensional structure in Figure 1;

[0034] Figure 6 is a schematic diagram of a partial three-dimensional structure in Figure 1.

[0035] Figure 7 is a schematic diagram of a partial three-dimensional structure in Figure 1;

[0036] Figure 8 is an enlarged view of point B in Figure 7;

[0037] Figure 9 is a schematic diagram of a partial three-dimensional structure in Figure 1.

[0038] Legend: 1. Grouting cylinder; 11. No. 1 chute; 12. Grout outlet; 13. Grout delivery pipe; 2. Separating circular plate; 3. Drive mechanism; 31. No. 1 drive motor; 32. No. 1 driving gear; 33. Driven gear; 34. Transmission shaft; 4. Vibration mechanism; 41. No. 1 connecting disc; 42. Fixing block; 43. No. 1 connecting frame; 44. Hinge seat; 45. Vibrator; 5. Hole cleaning mechanism; 51. No. 2 connecting disc; 52. Drive angle iron; 53. Guide tube; 531. No. 2 54. Slide groove; 55. Hole cleaning rod; 56. Return spring; 57. Fixed seat; 58. Connecting shaft; 59. Transmission angle iron; 6. Sealing shell; 70. Support mechanism; 71. Protective shell; 72. No. 2 drive motor; 73. No. 2 drive gear; 74. Transmission gear ring; 75. Actuating gear; 76. Bidirectional lead screw; 77. Slider; 78. Connecting rod; 79. Needle seat; 710. Insertion pin; 81. Support frame; 82. No. 3 slide groove; 83. No. 3 drive motor; 84. Sliding seat; 85. No. 2 connecting frame. Detailed Implementation

[0039] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1:

[0041] This application provides a method for forming high-strength prestressed low-carbon piles, the specific steps of which include:

[0042] S1. The engineering waste soil and other required raw materials are processed through a specific processing technology to transform it into a self-compacting slurry with good fluidity. Then, using drilling equipment, holes of different diameters are drilled in the ground according to specific engineering requirements. The composition and processing technology of the self-compacting slurry are implemented in accordance with the content disclosed in the invention patent with publication number CN112707685A.

[0043] S2. Using a grouting device, inject the previously prepared fluid self-compacting grout into the drilled holes to ensure that the self-compacting grout can fully fill the entire hole.

[0044] S3. Insert the low-carbon I-beam steel into the borehole after the self-compacting grout is injected. After the flowing self-compacting grout solidifies and hardens, it forms an integral pile with the low-carbon I-beam steel.

[0045] Example 2:

[0046] Based on Embodiment 1, referring to Figures 1-9, the grouting equipment includes a grouting cylinder 1. A partition circular plate 2 is fixedly connected inside the grouting cylinder 1. A driving mechanism 3 is provided on the partition circular plate 2. A hole-cleaning mechanism 5 is installed on the driving mechanism 3. The hole-cleaning mechanism 5 includes a second connecting disc 51 and a fixed seat 56 disposed above the second connecting disc 51. A driving angle iron 52 arranged in a circular array is provided on the second connecting disc 51. A guide tube 53 arranged in a circular array is fixedly installed on the fixed seat 56. The guide tube 53 slides inside. A cleaning rod 54 is installed, and a reset spring 55 for resetting the cleaning rod 54 is provided between the fixed base 56 and the cleaning rod 54. A connecting shaft 57 is fixedly installed at the lower end of each cleaning rod 54. A transmission angle iron 58 that cooperates with the driving angle iron 52 is fixedly installed at the lower end of each of the multiple connecting shafts 57. The inclined surfaces of the driving angle iron 52 and the transmission angle iron 58 are in opposite directions. A second slide groove 531 is opened on each guide tube 53, and the multiple connecting shafts 57 slide in the second slide groove 531 respectively.

[0047] Specifically, the drive mechanism 3 drives the second connecting disc 51 to rotate. The rotation of the second connecting disc 51 drives the multiple drive angle irons 52 on it to rotate. The inclined surface of the drive angle iron 52 can press against the inclined surface of the nearest transmission angle iron 58, thereby pushing the transmission angle iron 58 to move. The transmission angle iron 58 drives the connecting shaft 57 to move. Since the connecting shaft 57 is inside the second slide groove 531, the second slide groove 531 plays a linear guiding role, thereby pushing the cleaning rod 54 to slide outward inside the guide tube 53. The grout is then inserted into the outlet 12 on the grouting cylinder 1. This prevents stones, debris, or soil from accidentally falling into one or more outlets 12 during the process of inserting the grouting cylinder 1 deeper into the hole, thus blocking the outlets 12 and preventing the fluid grout from flowing out. This results in a smaller flow rate of fluid grout, affecting the grouting rate, wasting time, and causing the self-compacting grout to solidify over a long period of time, which is not conducive to the subsequent insertion of low-carbon I-beams.

[0048] In this embodiment, the driving mechanism 3 includes a first driving motor 31 fixedly installed on the bottom surface of the partition circular plate 2. A first driving gear 32 is fixedly installed at the output end of the first driving motor 31. The first driving gear 32 is meshed with a driven gear 33. A transmission shaft 34 is fixedly installed on the driven gear 33 and rotatably mounted on it. The transmission shaft 34 is rotatably mounted on the partition circular plate 2. The second connecting disc 51 is fixedly installed on the upper end of the transmission shaft 34.

[0049] Specifically, by starting the No. 1 drive motor 31, the No. 1 drive gear 32 is driven to rotate. The No. 1 drive gear 32 drives the driven gear 33 to rotate. The driven gear 33 drives the transmission shaft 34 to rotate. The rotation of the transmission shaft 34 can drive the upper hole cleaning mechanism 5 to clean out the gravel or soil inside the slurry outlet 12. It can also drive the vibration mechanism 4 at the lower end of the transmission shaft 34 to completely eliminate the air bubbles generated by the self-compacting slurry inside the hole.

[0050] In this embodiment, a sealing shell 6 is installed on the dividing circular plate 2 to seal the area of ​​the hole cleaning mechanism 5, and the plurality of hole cleaning rods 54 slide and are sealed to the sealing shell 6. The sealing shell 6 is used to prevent the self-compacting slurry from penetrating into the area of ​​the hole cleaning mechanism 5, so as to prevent the self-compacting slurry from flowing onto the parts and solidifying, thus damaging the parts.

[0051] Example 3:

[0052] Based on Embodiment 2, a vibration mechanism 4 is also installed at the lower end of the drive mechanism 3. The vibration mechanism 4 includes a first connecting disc 41 fixedly installed at the lower end of the transmission shaft 34. Fixed blocks 42 arranged in a ring array are installed on the first connecting disc 41. Each fixed block 42 is equipped with a first connecting frame 43 for connecting the hinge seat 44, and each hinge seat 44 is connected to a vibrating rod 45. It should be noted that the vibrating rod 45 is existing technology and is capable of generating vibration.

[0053] Specifically, the drive mechanism 3 drives the first connecting disc 41 to rotate, which in turn drives multiple fixed blocks 42 to rotate. Each fixed block 42 drives the first connecting frame 43 on it to rotate, which in turn drives the hinge seat 44 to rotate. The hinge seat 44 drives the vibrating rod 45 on it to rotate at a constant speed, and the vibrating rod 45 can generate vibration on its own. Thus, through the uniform rotation of multiple vibrating rods 45, it is possible to ensure that the self-compacting slurry is fully in contact with the same height range. Furthermore, the vibration of the vibrating rods 45 eliminates air bubbles inside the self-compacting slurry, so as to avoid poor solidification with the I-shaped steel and the risk of cracking.

[0054] Example 4:

[0055] Based on Embodiment 3, a support mechanism 7 is also installed on the outer wall of the grouting cylinder 1. The support mechanism 7 includes a protective shell 71 fixedly installed on the side wall of the grouting cylinder 1. The protective shell 71 protects the internal secondary drive motor 72 and prevents falling gravel or soil from hitting the internal secondary drive motor 72. The secondary drive motor 72 is installed inside the protective shell 71. A secondary drive gear 73 is fixedly installed at the output end of the secondary drive motor 72. The secondary drive gear 73 is meshed with a transmission gear ring 74. The transmission gear ring 74 is rotatably connected to the grouting cylinder 1 and is arranged through the protective shell 71. The outer side of the transmission gear ring 74 is also meshed with a plurality of actuating gears 75 arranged in a ring array. A bidirectional lead screw 76 is fixedly installed on the actuating gear 75, and the bidirectional lead screw 76 is rotatably installed on a fixed seat 56 provided on the side wall of the grouting cylinder 1. A slider 77 is threadedly connected to each of the two reverse-arranged threads of the bidirectional lead screw 76, and the slider 77 is slidably connected inside the first groove 11 opened on the grouting cylinder 1. A connecting rod 78 is rotatably installed on the slider 77, and a needle seat 79 is rotatably connected to the end of the connecting rod 78 away from the slider 77. A needle 710 is fixedly installed on the needle seat 79.

[0056] Specifically, during the grouting process, the grouting cylinder 1 is kept at the same height by stopping the up-and-down movement of the grouting cylinder 1 during the grouting process and vibrating it with the vibrator 45. This is achieved by starting the second drive motor 72 inside the protective shell 71, which drives the second drive gear 73 to rotate. The second drive gear 73 drives the transmission gear ring 74 to rotate, and the transmission gear ring 74 drives the multiple actuator gears 75 meshing with it to rotate. Each actuator gear 75 drives the bidirectional lead screw 76 on it to rotate. The rotation of the bidirectional lead screw 76 causes the two sliders 77 on it to move in opposite directions, thereby allowing the connecting rod 78 to rotate and change its lateral distance. This causes the needle seat 79 on it to move horizontally, and the needle seat 79 drives the insertion needle 710 to insert into the soil inside the hole. Thus, during the process of the vibrating mechanism 4 vibrating to eliminate air bubbles, the grouting cylinder 1 is reinforced and fixed by the support mechanism 7, which reduces the risk of the grouting cylinder 1 swinging due to the high-frequency vibration of the vibrator 45, causing damage or breakage of parts, and extends the service life of the equipment.

[0057] Example 5:

[0058] Based on Embodiment 4, the grouting equipment further includes a support frame 8 for supporting the grouting cylinder 1. A third drive motor 82 is mounted on the support frame 8. A threaded rod is fixedly mounted on the output end of the third drive motor 82, and the threaded rod is rotatably mounted to the support frame 8. A sliding seat 83 is threadedly connected to the threaded rod, and a guide shaft is fixedly mounted on the support frame 8. The sliding seat 83 is slidably mounted to the guide shaft. A second connecting frame 84 is fixedly mounted on the lower end of the sliding seat 83. The lower end is fixedly installed on the top surface of the grouting cylinder 1. Specifically, by starting the No. 3 drive motor 82, the threaded rod is rotated, which in turn drives the sliding seat 83 to move up and down along the guide shaft. The sliding seat 83 drives the grouting cylinder 1 into the interior of the hole through the No. 2 connecting frame 84. This changes the original method of grouting, which required manual or mechanical pouring of self-compacting grout from the hole opening into the hole. The construction speed was relatively slow, resulting in a long contact time between the self-compacting grout and cold air during the process of flowing into the hole, and the problem that the self-compacting grout had already solidified before the steel parts were inserted.

[0059] In this embodiment, a grout delivery pipe 13 is installed through the top of the grouting cylinder 1 for connecting to a self-compacting grout delivery pump to deliver the self-compacting grout into the interior of the grouting cylinder 1 and spray it out through the grout outlet 12.

[0060] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A method for forming high-strength prestressed low-carbon concrete piles, characterized in that, The specific steps include: S1. Prepare the construction waste and other required raw materials into a self-compacting slurry with good fluidity. Then, use drilling equipment to drill holes of different diameters on the ground according to specific engineering requirements. S2. Using a grouting device, inject the previously prepared fluid self-compacting grout into the drilled holes to ensure that the self-compacting grout can fully fill the entire hole. S3. Insert the low-carbon I-beam steel into the borehole after the self-compacting grout is injected. After the flowing self-compacting grout solidifies and hardens, it forms an integral pile with the low-carbon I-beam steel.

2. The forming method of a high-strength prestressed low-carbon pile according to claim 1, characterized in that, The grouting equipment includes a grouting cylinder (1) and a partition circular plate (2) fixedly installed inside the grouting cylinder (1), and also includes The vibration mechanism (4) is located inside the grouting cylinder (1). The vibration mechanism (4) includes a rotatable first connecting disc (41). The first connecting disc (41) is provided with a plurality of fixed blocks (42) arranged in a ring array. Each fixed block (42) is connected to a vibrating rod (45) that can generate vibration to eliminate air bubbles inside the self-compacting grout through a first connecting frame (43) and a hinge seat (44). The hole cleaning mechanism (5) is located above the vibrating mechanism (4) and is used to clean the gravel and soil inside the grout outlet (12) on the grouting cylinder (1); The support mechanism (7) is installed on the outer wall of the grouting cylinder (1) to enhance the stability of the grouting cylinder (1) and reduce the risk of damage to the internal components of the grouting cylinder (1) caused by vibration.

3. The forming method of a high-strength prestressed low-carbon pile according to claim 2, characterized in that, The hole-cleaning mechanism (5) includes a fixed base (56) and guide tubes (53) arranged in an array on the fixed base (56). Each guide tube (53) has a hole-cleaning rod (54) that can push and tamp out gravel and soil clods. The hole-cleaning rod (54) is connected to a transmission angle iron (58) via a connecting shaft (57). The hole cleaning mechanism (5) also includes a rotatable second connecting disk (51) and multiple drive angle irons (52) arranged in an array on the second connecting disk (51) that can cooperate with the transmission angle iron (58) and push the transmission angle iron (58) to move via the inclined plane.

4. The forming method of a high-strength prestressed low-carbon pile according to claim 2, characterized in that, A sealing shell (6) capable of blocking self-compacting slurry is installed above the dividing disc (2).

5. The forming method of a high-strength prestressed low-carbon pile according to claim 2, characterized in that, The support mechanism (7) includes a transmission gear ring (74) rotatably mounted on the outer wall of the grouting cylinder (1). The transmission gear ring (74) is provided with a plurality of actuating gears (75) arranged in an array. Each actuating gear (75) is fixedly mounted with a bidirectional lead screw (76). The bidirectional lead screw (76) is threadedly connected with two sliders (77). Each slider (77) is rotatably mounted with a connecting rod (78). The connecting rod (78) is rotatably mounted with a needle seat (79). The needle seat (79) is provided with a needle (710) for insertion into the side wall of the hole.

6. The forming method of a high-strength prestressed low-carbon pile according to claim 2, characterized in that, The grouting equipment also includes a support frame (8), on which a lifting mechanism is provided. The lifting mechanism includes a third drive motor (82) and a threaded rod provided at the output end of the third drive motor (82). A sliding seat (83) that can slide up and down is threadedly connected to the threaded rod, and the sliding seat (83) is connected to the top of the grouting cylinder (1) through a second connecting frame (84).

7. The forming method of a high-strength prestressed low-carbon pile according to claim 2, characterized in that, A slurry delivery pipe (13) for conveying fluid self-compacting slurry is installed through the grouting cylinder (1), and a delivery pump for pumping in self-compacting slurry is installed at the other end of the slurry delivery pipe (13).

8. The forming method of a high-strength prestressed low-carbon pile according to claim 3, characterized in that, The fixed base (56) and the guide tube (53) are arranged in a through manner, and a reset spring (55) for pulling the hole-clearing rod (54) back to its original position is installed inside the fixed base (56).

9. The forming method of a high-strength prestressed low-carbon pile according to claim 3, characterized in that, The grouting cylinder (1) is also equipped with multiple grout outlets (12), and the multiple cleaning rods (54) are arranged in a one-to-one correspondence with the grout outlets (12).

10. The forming method of a high-strength prestressed low-carbon pile according to claim 3, characterized in that, The grouting cylinder (1) is also equipped with a drive mechanism (3) for driving the first connecting disc (41) and the second connecting disc (51) to rotate.

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