A steel pipe pile layered grouting device and grouting method

Abstract

The present invention discloses a layered grouting device and a grouting method for steel pipe piles, the layered grouting device for steel pipe piles comprises: a grouting unit and a steel pipe pile, the side wall of the steel pipe pile is provided with a plurality of grouting holes along the axial direction, and the inner wall of the steel pipe pile is provided with a plurality of concave grooves along the axial direction; the grouting unit extends into the inner side of the steel pipe pile, and is fixed to a preset depth of the steel pipe pile based on the concave groove, and concrete slurry is input into the steel pipe pile, and the grouting holes are used to realize layered grouting of the construction area. The grouting device and the grouting method of the present invention can not only clarify the layered grouting height and ensure the fullness of each layered grouting, but also effectively limit the uneven pressure relief during the grouting process to ensure the quality of the layered grouting.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a layered grouting device and a grouting method for a steel pipe pile. Background Art

[0002] With the rapid development of infrastructure construction, complex engineering geology has brought many difficulties to the actual construction, and the uneven settlement of the foundation has caused serious damage to buildings and structures.

[0003] For the soft foundation encountered in actual construction, the commonly used treatment method is micro steel pipe pile grouting reinforcement. Since there are holes in the wall of the micro steel pipe, if the integral grouting is used, it is easy to cause uneven pressure relief in the pipe during the grouting process, and there will be large differences in the grouting filling degree of each layer.

[0004] Therefore, it is necessary to adopt more effective layered grouting for the grouting reinforcement of micro steel pipe piles in soft foundation. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems of the prior art and disclose a layered grouting device and a grouting method for steel pipe piles. The layered grouting device and / or the grouting method of the present invention can ensure the fullness of each layered grouting, and can also effectively limit the uneven pressure relief during the grouting process, thereby ensuring the quality of the layered grouting.

[0006] The object of the present invention is achieved through the following technical solutions:

[0007] A layered grouting device for steel pipe piles, comprising: a grouting unit and a steel pipe pile, wherein the side wall of the steel pipe pile is provided with a plurality of grouting holes along the axial direction, and the inner wall of the steel pipe pile is provided with a plurality of concave grooves along the axial direction; the grouting unit extends into the inner side of the steel pipe pile, and is fixed to a preset depth of the steel pipe pile based on the concave groove, and concrete slurry is input into the steel pipe pile, and the grouting holes are used to realize layered grouting of the area to be constructed.

[0008] According to a preferred embodiment, the concave groove is provided with a slope structure in a direction toward the bottom side of the steel pipe pile.

[0009] According to a preferred embodiment, the grouting unit includes a grouting pipe and a sealing plate, and the grouting pipe runs through the sealing plate; the sealing plate includes: a first sealing layer, a second sealing layer and a third sealing layer, wherein the second sealing layer is arranged between the first sealing layer and the third sealing layer, and the disk diameters of the first sealing layer and the third sealing layer are equal to the inner diameter of the steel pipe pile; and the second sealing layer has a telescopic structure, and the second sealing layer completes the radial expansion and contraction of the disk by rotation.

[0010] According to a preferred embodiment, a sealing disk central axis is provided at the center of the sealing disk, the sealing disk central axis passes through the first sealing layer, the second sealing layer and the third sealing layer, the sealing disk central axis is a tubular structure, and a central axis thread is provided on the inner tube wall of the sealing disk central axis; the grout outlet of the grouting pipe is provided with a threaded end, and the threaded end is connected to the sealing disk central axis via the threaded structure.

[0011] According to a preferred embodiment, the slurry outlet is arranged to extend out from the bottom surface of the slurry sealing disk.

[0012] According to a preferred embodiment, the second sealing layer includes two telescopic boxes and a plurality of springs, the two telescopic boxes are fan-shaped structures, and the two telescopic boxes are connected via connecting pieces to form a ring structure, and the connecting pieces are sleeved on the inner side of the telescopic boxes and movably connected with the telescopic boxes; the springs are evenly distributed in the circumferential direction of the central axis of the sealing disk, and the two ends of each spring are respectively connected to the outer wall of the central axis of the sealing disk and the inner wall of the telescopic box, and the springs are in a compressed state.

[0013] According to a preferred embodiment, the inner side walls of the box body of the telescopic box are respectively provided with a first guide groove and a second guide groove, and the connecting member is clamped between the first guide groove and the second guide groove.

[0014] According to a preferred embodiment, the second sealing layer also includes a fixed support, which is an annular structure, sleeved on the outside of the central axis of the sealing disk, and fixed on the third sealing layer; a plurality of fixing holes are provided on the side wall of the fixed support, and each spring is inserted through the fixing hole.

[0015] According to a preferred embodiment, the bottom end of the steel pipe pile is a conical bottom end.

[0016] On the other hand, the present invention also discloses:

[0017] A layered grouting method for steel pipe piles, using the above-mentioned layered grouting device, the layered grouting method comprising:

[0018] The grouting unit is placed at a preset depth inside the steel pipe pile, and the corresponding depth concave slot is used to limit the position, so as to realize the corresponding depth grouting of the steel pipe pile, and the preset depth grouting is realized in the construction area through the grouting holes on the steel pipe pile;

[0019] Then, the grouting pipe is screwed out, and a new sealing plate is put on to place the grouting unit at a preset depth inside the steel pipe pile, and the corresponding depth concave groove is used to limit the position, so as to realize the corresponding depth grouting of the steel pipe pile, and the preset depth grouting is performed on the construction area through the grouting hole on the steel pipe pile;

[0020] Repeat the cycle until grouting of each layer in the construction area is completed.

[0021] The aforementioned main scheme of the present invention and its further options can be freely combined to form multiple schemes, all of which are schemes that can be adopted and claimed for protection by the present invention. After understanding the scheme of the present invention, those skilled in the art can understand that there are multiple combinations based on the prior art and common knowledge, all of which are technical schemes to be protected by the present invention, and they are not exhaustively listed here.

[0022] The beneficial effects of the present invention are as follows: the grouting device and the grouting method of the present invention can not only clearly define the layered grouting height and ensure the fullness of each layered grouting, but also effectively limit the uneven pressure relief during the grouting process and ensure the quality of the layered grouting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the grout sealing plate below the steel pipe pile layered grouting device of the present invention;

[0024] Figure 2 It is a structural schematic diagram of grouting performed by the layered grouting device for steel pipe piles of the present invention;

[0025] Figure 3 It is a structural schematic diagram of a grouting pipe in a layered grouting device for steel pipe piles of the present invention;

[0026] Figure 4 It is a structural schematic diagram of a steel pipe pile in a steel pipe pile layered grouting device of the present invention;

[0027] Figure 5 It is a structural schematic diagram of a grout sealing plate in a layered grouting device for steel pipe piles of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the second grout sealing layer in the steel pipe pile layered grouting device of the present invention;

[0029] Figure 7 It is a schematic diagram of the connection relationship between the connector and the telescopic box in the steel pipe pile layer grouting device of the present invention;

[0030] Figure 8 It is a structural schematic diagram of a grout sealing plate in a layered grouting device for steel pipe piles of the present invention;

[0031] Among them, 1-grouting pipe, 2-threaded end, 3-spring, 4-first guide groove, 5-telescopic box, 6-second guide groove, 7-connecting piece, 8-central axis of sealing slurry disk, 9-fixed support, 10-central axis thread, 12-first sealing slurry layer, 13-third sealing slurry layer, 14-steel pipe pile, 15-slurry outlet hole, 16-conical bottom end, 17-concave slot, 18-slurry delivery hose, 19-slurry outlet. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, the present invention should be pointed out that, in the present invention, unless the specific structure, connection relationship, positional relationship, power source relationship, etc. are specifically written out, the structure, connection relationship, positional relationship, power source relationship, etc. involved in the present invention are all known by those skilled in the art on the basis of the prior art without creative work.

[0038] Embodiment 1:

[0039] refer to Figures 1 to 8 As shown, a layered grouting device for steel pipe piles is shown, and the layered grouting device for steel pipe piles includes: a grouting unit and a steel pipe pile 14.

[0040] A plurality of slurry outlet holes 15 are provided on the side wall of the steel pipe pile 14 along the axial direction, and a plurality of concave grooves 17 are provided on the inner wall of the steel pipe pile 14 along the axial direction.

[0041] The grouting unit extends into the inner side of the steel pipe pile 14 and is fixed to a preset depth of the steel pipe pile 14 based on the concave slot 17 , and concrete slurry is input into the steel pipe pile 14 , and the grouting holes 15 are used to perform layered grouting on the construction area.

[0042] Preferably, the concave slot 17 is provided with a slope structure in a direction toward the bottom side of the steel pipe pile 14, so that the sealing plate in the grouting unit can move downward but cannot move upward.

[0043] Furthermore, the bottom end of the steel pipe pile 14 is a conical bottom end 16, so that it is convenient to insert the steel pipe pile 14 into the area to be constructed.

[0044] Specifically, the slurry outlet holes 15 are arranged at a certain interval h2, and the hole diameter can be set according to actual needs. The inner wall of the steel pipe pile 14 is provided with a limited recovery type concave groove 17 at a certain interval h1, and is arranged in a ring along the inner wall.

[0045] Preferably, the grouting unit comprises a grouting pipe 1 and a grouting plate, wherein the grouting pipe 1 runs through the grouting plate. The grouting plate comprises: a first grouting layer 12, a second grouting layer and a third grouting layer 13. The grouting pipe 1 is connected to a grouting hose 18.

[0046] The second sealing layer is disposed between the first sealing layer 12 and the third sealing layer 13, and the diameters of the first sealing layer 12 and the third sealing layer 13 are equal to the inner diameter of the steel pipe pile 14. The second sealing layer has a telescopic structure, and the second sealing layer completes radial telescopic movement of the disk by rotating.

[0047] Preferably, a sealing disk central axis 8 is provided at the center of the sealing disk, and the sealing disk central axis 8 runs through the first sealing layer 12 , the second sealing layer 13 .

[0048] Preferably, the sealing plate central axis 8 is a tubular structure, and the inner tube wall of the sealing plate central axis 8 is provided with a central axis thread 10. The grout outlet 19 of the grouting pipe 1 is provided with a threaded end 2, and the threaded end 2 is connected to the sealing plate central axis 8 through a threaded structure.

[0049] Furthermore, the slurry outlet 19 is arranged to extend out from the bottom surface of the slurry sealing disk.

[0050] Preferably, the second sealing layer includes two telescopic boxes 5 and a plurality of springs 3. The two telescopic boxes 5 are fan-shaped structures, and the two telescopic boxes 5 are connected to form a ring structure via connecting members 7. The connecting members 7 are sleeved on the inner side of the telescopic boxes 5 and are movably connected to the telescopic boxes 5.

[0051] The springs 3 are evenly distributed in the circumferential direction of the sealing disk center axis 8, and the two ends of each spring 3 are respectively connected to the outer wall of the sealing disk center axis 8 and the inner wall of the telescopic box 5, and the springs 3 are in a compressed state.

[0052] That is, each spring 3 has a tendency to extend, thereby pushing the two telescopic boxes 5 to separate, so that the connecting member 7 rotates and extends. That is, the disc body of the second sealing slurry layer can be radially extended.

[0053] Furthermore, the inner side walls of the telescopic box 5 are respectively provided with a first guide groove 4 and a second guide groove 6 , and the connecting member 7 is clamped between the first guide groove 4 and the second guide groove 6 so as to be able to slide relative to each other.

[0054] Preferably, the second sealing layer further comprises a fixed support 9. The fixed support 9 is an annular structure, sleeved on the outside of the sealing disk central axis 8, and fixed on the third sealing layer 13. A plurality of fixing holes are arranged on the side wall of the fixed support 9, and each spring 3 is inserted through the fixing hole to complete the position fixation of the spring 3.

[0055] Example 2

[0056] Based on Example 1, this example further discloses a layered grouting method for steel pipe piles. The layered grouting device described in Example 1 is used. The layered grouting method comprises:

[0057] The grouting unit is placed at a preset depth inside the steel pipe pile 14 and limited by the corresponding depth concave slot 17 to achieve corresponding depth grouting of the steel pipe pile 14, and the grouting holes 15 on the steel pipe pile 14 are used to achieve preset depth grouting of the construction area.

[0058] Then, the grouting pipe 1 is screwed out, and a new sealing plate is put on to place the grouting unit at a preset depth inside the steel pipe pile 14, and the corresponding depth concave groove 17 is used to limit the position, so as to realize the corresponding depth grouting of the steel pipe pile 14, and the grouting hole 15 on the steel pipe pile 14 is used to perform grouting at a preset depth in the construction area;

[0059] Repeat the cycle until grouting of each layer in the construction area is completed.

[0060] Specifically:

[0061] Before grouting, after the steel pipe pile 14 is buried in the pile hole, the middle layer of the sealing plate is shrunk to make the diameters of the three layers of sealing plates consistent, and then the entire sealing plate is sent from the pile top to the proposed grouting layer through the metal grouting pipe 1, during which the second sealing layer is in close contact with the inner wall of the steel pipe pile 14 (the spring 3 is always in a compressed state). After reaching the proposed grouting layer, the other end of the grouting hose 18 is connected to the grouting machine, and then grouting is performed.

[0062] During the grouting process, the sealing plate and the metal grouting pipe 1 will be pushed back to the concave groove 17 of the steel pipe pile 14 by the lower air pressure. At this time, the second sealing layer of the sealing plate is stretched radially by the rebound effect of the spring 3, further driving the connection piece 7 and the telescopic box 5 to stretch, forming a blocking state at the concave groove 17. Continuous pressurized grouting ensures that each layer of grouting can reach the designed filling degree, effectively avoiding the problem of uneven pressure relief of the pile body.

[0063] After the grouting of the intended grouting layer is completed, the grouting hose 18 is first removed, and then the metal grouting pipe 1 can be screwed out with the help of mechanical rotation. Due to the limitation of the concave groove 17, the sealing plate can no longer be taken out and is left in the grouting layer, which also plays a role in layered reinforcement.

[0064] If a new layer of grouting is to be continued, the unscrewed grouting pipe 1 will be reconnected to the grouting hose 18 and the new sealing plate, and then the sealing plate will be sent along the inner wall of the steel pipe pile 14 for a new round of grouting. This cycle will be repeated, and grouting will be back-filled from the bottom of the pile to the top of the pile, ultimately achieving layered reinforcement of the foundation.

[0065] The grouting device and grouting method of the present invention can not only clearly define the layered grouting height and ensure the fullness of each layered grouting, but also effectively limit the uneven pressure relief during the grouting process and ensure the quality of the layered grouting.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A layered grouting device for steel pipe piles, characterized in that: The steel pipe pile layered grouting device comprises: a grouting unit and a steel pipe pile (14). The side wall of the tube body of the steel tube pile (14) is provided with a plurality of slurry outlet holes (15) along the axial direction, and the inner wall of the tube body of the steel tube pile (14) is provided with a plurality of concave grooves (17) along the axial direction; The grouting unit extends into the inner side of the tube body of the steel pipe pile (14), and is fixed to a preset depth of the steel pipe pile (14) based on the concave clamping groove (17), and concrete grout is input into the steel pipe pile (14), and layered grouting is performed on the construction area through the grouting hole (15); The grouting unit comprises a grouting pipe (1) and a grouting sealing plate, wherein the grouting pipe (1) runs through the grouting sealing plate; The sealing disk comprises: a first sealing layer (12), a second sealing layer and a third sealing layer (13), wherein the second sealing layer is arranged between the first sealing layer (12) and the third sealing layer (13), and the disk diameters of the first sealing layer (12) and the third sealing layer (13) are equal to the inner diameter of the steel pipe pile (14); The second sealing slurry layer achieves radial expansion and contraction of the disc body by rotating; A sealing disk central axis (8) is provided at the center of the sealing disk, and the sealing disk central axis (8) runs through the first sealing layer (12), the second sealing layer and the third sealing layer (13). The sealing disk central axis (8) is a tubular structure, and a central axis thread (10) is provided on the inner tube wall of the sealing disk central axis (8); The grout outlet (19) of the grouting pipe (1) is provided with a threaded end (2), and the threaded end (2) is connected to the central axis (8) of the sealing plate via a threaded structure; The second sealing layer comprises two telescopic boxes (5) and a plurality of springs (3). The two telescopic boxes (5) are of fan-shaped structures, and the two telescopic boxes (5) are respectively connected via connecting pieces (7) to form a ring-shaped structure, and the connecting pieces (7) are sleeved on the inner side of the telescopic boxes (5) and movably connected to the telescopic boxes (5); The springs (3) are evenly distributed in the circumferential direction of the central axis (8) of the sealing disk, and two ends of each spring (3) are respectively connected to the outer wall of the central axis (8) of the sealing disk and the inner wall of the telescopic box (5), and the springs (3) are in a compressed state; The concave clamping groove (17) is provided with a slope structure in a direction toward the bottom side of the steel pipe pile (14); The bottom end of the steel pipe pile (14) is a conical bottom end (16).

2. The steel pipe pile layer grouting device according to claim 1, characterized in that: The slurry outlet (19) is arranged to extend out from the bottom surface of the slurry sealing disk.

3. The steel pipe pile layer grouting device according to claim 1, characterized in that: A first guide groove (4) and a second guide groove (6) are respectively provided on the inner side walls of the box body of the telescopic box (5), and the connecting member (7) is clamped between the first guide groove (4) and the second guide groove (6).

4. The steel pipe pile layer grouting device according to claim 1, characterized in that: The second sealing layer further comprises a fixed support (9), wherein the fixed support (9) is an annular structure, sleeved on the outside of the sealing disk central axis (8), and fixed on the third sealing layer (13); A plurality of fixing holes are provided on the side wall of the fixing support (9), and each spring (3) is inserted through the fixing hole.

5. A layered grouting method for steel pipe piles, characterized in that: Using the layered grouting device according to any one of claims 1 to 4, the layered grouting method comprises: The grouting unit is placed at a preset depth inside the steel pipe pile (14), and the corresponding depth concave groove (17) is used to limit the position, so as to realize grouting at a corresponding depth of the steel pipe pile (14), and the grouting hole (15) on the steel pipe pile (14) realizes grouting at a preset depth in the construction area; Then, the grouting pipe (1) is screwed out, and a new grouting plate is put on to place the grouting unit at a preset depth inside the steel pipe pile (14), and the corresponding depth concave groove (17) is used to limit the position, so as to realize grouting at a corresponding depth of the steel pipe pile (14), and the grouting hole (15) on the steel pipe pile (14) is used to realize grouting at a preset depth in the construction area; Repeat the cycle until grouting of each layer in the construction area is completed.

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