Premixed flow state cement soil thin-wall pipe pile forming machine and method

Abstract

The invention belongs to the technical field of cement soil pipe pile forming, and relates to a premixed flow state cement soil thin-wall pipe pile forming machine and a pile forming method.The pile forming machine comprises a settling end, an inner pile and an outer pile, the inner pile and the outer pile are detachably connected with the settling end, the settling end is provided with a through hole, and the inner pile is provided with a cavity communicated with the through hole; the outer pile is located on the periphery of the inner pile and is concentric with the inner pile, an annular space is formed between the outer pile and the inner pile, a cement soil pouring seat is arranged in the annular space, the electromagnetic fixing cover plate is matched with the inner pile, the outer pile and the cement soil pouring seat, and a pouring opening and a ventilation opening which are communicated with the cement soil pouring seat are formed in the electromagnetic fixing cover plate. According to the premixed flow state cement soil thin-wall pipe pile forming machine, the pile forming quality is good, the pile forming process is guaranteed, and the formed pile can be conveniently separated from the thin-wall pipe pile.

Description

Technical Field

[0001] The invention belongs to the technical field of premixed fluidized cement soil thin-wall pipe piles, and relates to a premixed fluidized cement soil thin-wall pipe pile forming machine and a pile forming method. Background Art

[0002] In the field of pipe pile technology, the common method is currently the mixing pile method, that is, after the auger sinks to the target position, the auger is lifted upwards and the pile is sprayed through the center rod of the auger. This method has the problem of poor cement uniformity during pile formation, resulting in poor pile quality and low bearing capacity. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and provide a premixed fluidized cement soil thin-wall pipe pile forming machine.

[0004] To achieve the above-mentioned purpose, the present invention provides a premixed fluidized cement soil thin-wall pipe pile forming machine, comprising a settlement end and an inner pile and an outer pile respectively detachably connected to the settlement end, the settlement end having a through hole, the inner pile having a cavity connected to the through hole, the outer pile being located at the outer periphery of the inner pile and concentrically arranged with the inner pile, an annulus being provided between the outer pile and the inner pile, a cement soil casting seat being provided in the annulus, and an electromagnetic fixing cover plate being respectively matched with the inner pile, the outer pile and the cement soil casting seat, and a casting port and a vent being provided on the electromagnetic fixing cover plate connected to the cement soil casting seat.

[0005] Furthermore, a first matching column and a second matching column are provided on the settling end, a first matching hole is provided at the lower end of the outer pile to match with the first matching column, and a second matching hole is provided at the lower end of the inner pile to match with the second matching column.

[0006] Furthermore, a conical transition section is provided on a side of the inner pile away from the settlement end, and the diameter of the conical transition section gradually increases in a direction close to the settlement end;

[0007] The side wall of the cement soil casting seat matched with the inner pile has an inclined portion adapted to the conical transition section.

[0008] Furthermore, a connecting portion is fixedly connected to the upper end of the conical transition section.

[0009] Furthermore, the electromagnetic fixing cover plate comprises a cover plate body and a locking structure mounted on the cover plate body, and the cover plate body has a central mounting hole matched with the connecting portion.

[0010] Furthermore, a ring groove is provided on one side of the cover plate body facing the annulus;

[0011] The locking structure comprises:

[0012] A vertical spring, fixed in the annular groove;

[0013] A locking ring is located at the outer periphery of the inclined portion, the inner diameter of the locking ring is larger than the minimum diameter of the inclined portion and smaller than the maximum diameter of the inclined portion, the locking ring has a connecting column extending into the ring groove and fixedly connected to the vertical spring, and when the electromagnetic fixing cover plate is energized, the locking ring is driven to move downward in a direction away from the electromagnetic fixing cover plate to lock the inclined portion.

[0014] Furthermore, the electromagnetic fixing cover plate is also provided with a mounting groove, and the locking structure further comprises:

[0015] A horizontal spring, fixedly installed in the mounting groove;

[0016] A horizontal locking member having a connecting slider, the connecting slider is extended to slide with the mounting groove and is fixedly connected with the horizontal spring;

[0017] The horizontal locking piece abuts against the outer side wall of the locking ring, and the side of the horizontal locking piece facing the locking ring is a conical surface, and the outer side surface of the locking ring is a second conical surface matching the conical surface);

[0018] The locking ring moves downward to drive the horizontal locking member to move toward the direction close to the outer pile.

[0019] The present invention also provides a pile forming method of a premixed fluidized cement soil thin-wall pipe pile forming machine, comprising:

[0020] S1, connecting the inner pile, the outer pile and the settlement end;

[0021] S2, placing the cement soil casting seat in the annulus, and then installing the electromagnetic fixed cover plate, the casting port and the vent on the electromagnetic fixed cover plate are connected to the premixed water flow state soil supply pipe and the gas pipe respectively;

[0022] S3, the electromagnetic fixing cover plate is energized, the locking ring moves downward to lock the inclined portion, and at the same time, the horizontal locking member moves outward to lock the cement soil casting seat and the side wall of the outer pile, and the pile driver is assembled;

[0023] S4, sinking the pile driver to a predetermined depth, pouring premixed cement soil into the annulus through the premixed fluidized cement soil supply pipe, the premixed cement soil falls into the cement soil pouring seat, and after pouring a predetermined height of cement soil in the cement soil pouring seat, high-pressure gas is filled into the cement soil pouring seat through the vent to pressurize the fluidized cement soil until the cement soil is poured to a set height;

[0024] S5. After 30 minutes, when the cement soil in the cement soil casting seat is initially solidified, the cement soil casting is vacuumed through the vent;

[0025] S6, the electromagnetic fixing cover plate is powered off, the locking ring and the horizontal locking member are reset, and the contact with the cement soil casting seat is disconnected, the inner pile, the outer pile and the electromagnetic fixing cover plate are raised, and the cement soil is completely solidified to form a thin-walled pipe pile;

[0026] S7, installing the next settlement end and the cement soil casting seat to carry out the next thin-wall pipe pile operation.

[0027] The beneficial effects of the present invention are as follows:

[0028] The premixed fluid cement soil thin-wall pipe pile forming machine and the pile forming method of the present invention are conducive to pouring premixed fluid cement soil, and the cement soil has good uniformity. Through the detachable connection between the settlement end and the inner pile and the outer pile, the setting of the locking structure is conducive to ensuring the quality of the pipe pile molding, and at the same time, it is convenient to disengage from the thin-wall pipe pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional diagram schematically showing a premixed fluidized cement soil thin-wall pipe pile forming machine according to an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of a front view of a premixed fluidized cement soil thin-wall pipe pile forming machine according to an embodiment of the present invention;

[0031] Figure 3 A schematic top view of a premixed fluidized cement soil thin-wall pipe pile forming machine according to an embodiment of the present invention is shown;

[0032] Figure 4 Schematic representation Figure 3 Sectional view at AA;

[0033] Figure 5 Schematic representation Figure 4 Enlarged view of part A in the middle;

[0034] Figure 6 Schematic representation Figure 4 Enlarged view of middle part B;

[0035] Figure 7 A three-dimensional diagram schematically shows an electromagnetic fixing cover plate according to an embodiment of the present invention.

[0036] The meanings of the symbols in the accompanying drawings are as follows:

[0037] 1. Settlement end; 2. Inner pile; 3. Outer pile; 11. Through hole; 21. Cavity; 4. Annulus; 5. Cement soil casting seat; 6. Electromagnetic fixing cover plate; 7. Casting port; 8. Vent; 12. First matching column; 13. Second matching column; 31. First matching hole; 22. Second matching hole; 23. Conical transition section; 24. Connecting part; 61. Cover plate body; 611. Middle mounting hole; 62. Locking structure; 612. Ring groove; 621. Vertical spring; 622. Locking ring; 51. Inclined part; 623. Connecting column; 613. Mounting groove; 624. Horizontal spring; 625. Horizontal locking piece; 626. Connecting slider; 627. Conical surface; 6221. Second conical surface. DETAILED DESCRIPTION

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0040] Combination Figure 1-Figure 7 As shown, the present invention provides a premixed fluidized cement soil thin-wall pipe pile forming machine, comprising a settlement end 1 and an inner pile 2 and an outer pile 3 respectively detachably connected to the settlement end 1. The settlement end 1 has a through hole 11, and the inner pile 2 has a cavity 21 connected to the through hole 11. The outer pile 3 is located on the outer periphery of the inner pile 2 and is concentrically arranged with the inner pile 2. According to one embodiment of the present invention, a first matching column 12 and a second matching column 13 are provided on the settlement end 1, a first matching hole 31 is provided at the lower end of the outer pile 3 to match the first matching column 12, and a second matching hole 22 is provided at the lower end of the inner pile 2 to match the second matching column 13. Through the matching of the first matching hole 31 and the first matching column 12, and the matching of the second matching hole 22 and the second matching column 13, the connection between the settlement end and the inner pile 2 and the outer pile 3 is realized.

[0041] The premixed fluidized cement soil thin-wall pipe pile forming machine of the present invention has an annulus 4 between the outer pile 3 and the inner pile 2, a cement soil casting seat 5 is arranged in the annulus 4, and also includes an electromagnetic fixed cover plate 6, which is respectively matched with the inner pile 2, the outer pile 3 and the cement soil casting seat 5, and the electromagnetic fixed cover plate 6 is provided with a casting port 7 and a vent 8 connected to the cement soil casting seat 5. The casting port 7 is used to cast cement soil into the cement soil casting seat 5, and the vent 8 is used to ventilate the cement soil casting seat 5.

[0042] According to one embodiment of the present invention, a conical transition section 23 is provided on the side of the inner pile 2 away from the settlement end 1, and the diameter of the conical transition section 23 gradually increases in the direction close to the settlement end 1. The side wall of the cement soil casting seat 5 matching the inner pile 2 has an inclined portion 51 adapted to the conical transition section 23. The upper end of the conical transition section 23 is fixedly connected with a connecting portion 24. The electromagnetic fixing cover plate 6 includes a cover plate body 61 and a locking structure 62 installed on the cover plate body 61, and the cover plate body 61 has a middle mounting hole 611 matched with the connecting portion 24. The cover plate body 61 is sealed and matched with the connecting portion 24 and the inner wall of the outer pile 3 respectively.

[0043] According to one embodiment of the present invention, a ring groove 612 is provided on the side of the cover plate body 61 facing the annulus 4, and the locking structure (62) includes a vertical spring 621 and a locking ring 622. The vertical spring 621 is fixed in the ring groove 612, and the locking ring 622 is located at the outer periphery of the inclined portion 51. The inner diameter of the locking ring 622 is larger than the minimum diameter of the inclined portion 51 and smaller than the maximum diameter of the inclined portion 51. The locking ring 622 has a connecting column 623 extending into the ring groove 612 and fixedly connected to the vertical spring 621. When the electromagnetic fixed cover plate 6 is powered on, the locking ring 622 is driven to move downward in a direction away from the electromagnetic fixed cover plate 6 to lock the inclined portion 51.

[0044] In addition, the electromagnetic fixed cover plate 6 is also provided with a mounting groove 613, and the locking structure 62 also includes a horizontal spring 624 and a horizontal locking member 625. The horizontal spring 624 is fixedly installed in the mounting groove 613, and the horizontal locking member 625 has a connecting slider 626, which extends and slides with the mounting groove 613 and is fixedly connected with the horizontal spring 624. In this embodiment, the horizontal locking member 625 abuts against the outer wall of the locking ring 622, and the side of the horizontal locking member 625 facing the locking ring 622 is a conical surface 627, and the outer side surface of the locking ring 622 is a second conical surface 6221 that matches the conical surface 627. The locking ring 622 moves downward to drive the horizontal locking member 625 to move in the direction close to the outer pile 3.

[0045] The premixed fluidized cement soil thin-wall pipe pile forming machine of the present invention is arranged through the above-mentioned structure. Before the cement soil is poured, the electromagnetic fixed cover plate 6 is energized to drive the locking ring 622 to move downward to lock the water inclined portion 51. At the same time, during the downward movement of the locking ring 622, due to the above-mentioned arrangement of the second conical surface 6221 and the conical surface 627, the downward movement of the locking ring 622 will drive the horizontal locking member 625 to move outward, thereby pressing against the side wall of the cement soil pouring seat 5 that is in contact with the inner wall of the outer pile 3. Therefore, the present invention can fix the cement soil casting seat 5 through the setting of the locking structure 62, thereby avoiding the problem of the cement soil casting seat 5 collapsing downward during the casting process due to the thin thickness of the cement soil casting seat 5 (in order to fit the outer pile 3 and the inner pile 2 to make the pipe pile better). In addition, the influence of the cement soil being poured into the cement soil casting seat 5 along its lateral outward expansion can be reduced, which is beneficial for lifting the inner pile 2 and the outer pile 3 when the pile driver is lifted upward after the casting is completed, and avoiding damage to the cast pipe pile during the lifting process.

[0046] In addition, the premixed fluidized cement soil thin-wall pipe pile forming machine of the present invention has the above-mentioned detachable connection between the inner pile 2 and the outer pile 3 at the settlement end 1. As the cement soil is continuously poured, the gravity of the cement soil becomes larger and larger and gradually becomes larger than the matching force between the settlement end 1 and the inner pile 2 and the outer pile 3. Therefore, when the pouring is completed, the pile forming machine is lifted upward to achieve the separation of the inner pile 2 and the outer pile 3 from the settlement end 1.

[0047] The present invention also provides a pile forming method using the above-mentioned premixed fluid cement soil thin-wall pipe pile forming machine, comprising S1, connecting the inner pile 2 and the outer pile 3 to the settlement end 1, S2, placing the cement soil casting seat 5 in the annulus 4, and then installing the electromagnetic fixed cover plate 6, the casting port 7 and the vent 8 on the electromagnetic fixed cover plate 6 are respectively connected to the premixed fluid soil supply pipe and the air pipe; S3, the electromagnetic fixed cover plate 6 is energized, the locking ring 622 moves down to lock the inclined portion 51, and at the same time the horizontal locking member 625 moves outward to lock the side wall of the cement soil casting seat 5 and the outer pile 3, and the pile forming machine is assembled; S4, the pile forming machine is settled to a predetermined depth (taking 12 meters as an example), and the premixed cement soil is cast into the annulus 4 through the premixed fluid cement soil supply pipe, and the premixed cement soil falls on the cement In the cement soil casting seat 5, and each time after pouring a predetermined height (1.5 meters) of cement soil in the cement soil casting seat 5, high-pressure gas is filled into the cement soil casting seat 5 through the vent 8 to pressurize the fluidized cement soil until the cement soil is cast to the set height; S5, 30 minutes later, after the cement soil in the cement soil casting seat 5 is initially solidified, the cement soil casting seat 5 is vacuumed through the vent 8, so that the cement soil casting seat 5 is tightly fitted with the cement pipe pile after initial solidification. On the one hand, the protection effect of the cement soil pipe pile can be improved by improving the fit. On the other hand, the improvement of the fit is conducive to reducing the friction when the inner pile 2 and the outer pile 3 are lifted upward, reducing the difficulty of lifting, avoiding damage to the cement soil casting seat 5, the inner pile 2, and the outer pile 3, and improving the service life. S6, the electromagnetic fixing cover plate 6 is powered off, the locking ring 622 and the horizontal locking member 625 are reset, and the contact with the cement soil casting seat 5 is disconnected, the inner pile 2, the outer pile 3 and the electromagnetic fixing cover plate 6 are raised, and the settlement end 1 and the cement soil casting seat 5 are left in the settlement position, waiting for the cement soil to completely solidify to form a thin-walled pipe pile. S7, the next settlement end 1 and the cement soil casting seat 5 are installed to carry out the next thin-walled pipe pile operation.

[0048] The above is only one embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A premixed fluidized cement soil thin-wall pipe pile forming machine, characterized in that: The invention comprises a settlement end (1) and an inner pile (2) and an outer pile (3) respectively connected to the settlement end (1) in a detachable manner. The settlement end (1) has a through hole (11). The inner pile (2) has a cavity (21) connected to the through hole (11). The outer pile (3) is located on the outer periphery of the inner pile (2) and is arranged concentrically with the inner pile (2). An annulus (4) is provided between the outer pile (3) and the inner pile (2). A cement soil casting seat (5) is provided in the annulus (4). The invention also comprises an electromagnetic fixing cover plate (6). The electromagnetic fixing cover plate (6) is respectively matched with the inner pile (2), the outer pile (3) and the cement soil casting seat (5). The electromagnetic fixing cover plate (6) is provided with a casting port (7) and a vent (8) connected to the cement soil casting seat (5).

2. The premixed fluidized cement soil thin-wall pipe pile forming machine according to claim 1, characterized in that: The sinking end (1) is provided with a first matching column (12) and a second matching column (13); the lower end of the outer pile (3) is provided with a first matching hole (31) for matching with the first matching column (12); the lower end of the inner pile (2) is provided with a second matching hole (22) for matching with the second matching column (13).

3. The premixed fluidized cement soil thin-wall pipe pile forming machine according to claim 2, characterized in that: A conical transition section (23) is provided on the side of the inner pile (2) away from the settlement end (1), and the diameter of the conical transition section (23) gradually increases in a direction approaching the settlement end (1); The side wall of the cement soil casting seat (5) matched with the inner pile (2) has an inclined portion (51) adapted to the conical transition section (23).

4. The premixed fluidized cement soil thin-wall pipe pile forming machine according to claim 3, characterized in that: The upper end of the conical transition section (23) is fixedly connected with a connecting portion (24).

5. The premixed fluidized cement soil thin-wall pipe pile forming machine according to claim 4, characterized in that: The electromagnetic fixing cover plate (6) comprises a cover plate body (61) and a locking structure (62) mounted on the cover plate body (61); the cover plate body (61) has a middle mounting hole (611) that matches the connecting portion (24).

6. The premixed fluidized cement soil thin-wall pipe pile forming machine according to claim 5, characterized in that: A ring groove (612) is provided on one side of the cover plate body (61) facing the annular space (4); The locking structure (62) comprises: A vertical spring (621) is fixed in the annular groove (612); A locking ring (622) is located on the outer periphery of the inclined portion (51); the inner diameter of the locking ring (622) is greater than the minimum diameter of the inclined portion (51) and smaller than the maximum diameter of the inclined portion (51); the locking ring (622) has a connecting column (623) extending into the annular groove (612) and fixedly connected to the vertical spring (621); when the electromagnetic fixing cover plate (6) is energized, the locking ring (622) is driven to move downward in a direction away from the electromagnetic fixing cover plate (6) to lock the inclined portion (51).

7. The premixed fluidized cement soil thin-wall pipe pile forming machine according to claim 6, characterized in that: The electromagnetic fixing cover plate (6) is also provided with a mounting groove (613), and the locking structure (62) further comprises: A horizontal spring (624) is fixedly mounted in the mounting groove (613); A horizontal locking member (625) having a connecting slider (626), wherein the connecting slider (626) extends to slide with the mounting groove (613) and is fixedly connected to the horizontal spring (624); The horizontal locking piece (625) is in contact with the outer side wall of the locking ring (622), and the side of the horizontal locking piece (625) facing the locking ring (622) is a conical surface (627), and the outer side surface of the locking ring (622) is a second conical surface (6221) that matches the conical surface (627); The locking ring (622) moves downwards, driving the horizontal locking member (625) to move in a direction close to the outer pile (3).

8. A pile-forming method using the premixed fluidized cement soil thin-wall pipe pile forming machine according to any one of claims 1 to 7, comprising: S1, connecting the inner pile (2), the outer pile (3) and the settlement end (1); S2, placing the cement soil casting seat (5) in the annulus (4), and then installing the electromagnetic fixed cover plate (6), the casting port (7) and the vent (8) on the electromagnetic fixed cover plate (6) are connected to the premixed water flow state soil supply pipe and the air pipe respectively; S3, the electromagnetic fixing cover plate (6) is energized, the locking ring (622) moves downward to lock the inclined portion (51), and at the same time, the horizontal locking member (625) moves outward to lock the cement soil casting seat (5) and the side wall of the outer pile (3) that matches, and the pile driver is assembled; S4, sinking the pile driver to a predetermined depth, pouring premixed cement soil into the annulus (4) through the premixed fluidized cement soil supply pipe, the premixed cement soil falling into the cement soil pouring seat (5), and after pouring a predetermined height of cement soil in the cement soil pouring seat (5), high-pressure gas is filled into the cement soil pouring seat (5) through the vent (8) to pressurize the fluidized cement soil until the cement soil is poured to a set height; S5, after 30 minutes, when the cement soil in the cement soil casting seat (5) is initially solidified, the cement soil casting seat (5) is evacuated through the vent (8); S6, the electromagnetic fixing cover plate (6) is powered off, the locking ring (622) and the horizontal locking member (625) are reset, and the contact with the cement soil casting seat (5) is disconnected, and the inner pile (2), the outer pile (3) and the electromagnetic fixing cover plate (6) are raised, and the cement soil is waited for to completely solidify to form a thin-walled pipe pile; S7, installing the next settlement end (1) and the cement soil casting seat (5) to carry out the next thin-wall pipe pile operation.

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