A layered grouting device and a grouting method

Abstract

The present invention discloses a layered grouting device and a grouting method, wherein the layered grouting device comprises: a grouting unit and a grouting pipe, wherein the side wall of the grouting pipe body is provided with a plurality of grouting holes along the axial direction, and the inner wall of the grouting pipe body is provided with a plurality of layers of clamping rings along the axial direction; the grouting unit is fixed to each depth of the grouting pipe based on the clamping ring structure, and concrete slurry is input into the grouting pipe, and the grouting holes are used to realize layered grouting of the construction area. The device of the present invention is designed with a reserved clamping ring for the grouting pipe, and a first support rod, a second support rod, a first support plate, a second support plate and a grouting ring to form an extendable support frame, which is then combined with a grouting rubber airbag and a grouting pipe, so that the device can be reused, the filling degree of each layered grouting can be ensured, and the uneven pressure relief during the grouting process can be effectively limited to ensure the quality of the layered grouting.

Description

Technical Field

[0001] The invention belongs to the field of building construction, and in particular relates to a micro steel pipe pile layered grouting device and a grouting method. 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. 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] On the one hand, the purpose of the present invention is achieved by the following technical solutions:

[0007] A layered grouting device, the layered grouting device comprises: a grouting unit and a grouting pipe, the side wall of the grouting pipe body is provided with a plurality of grouting holes along the axial direction, and the inner wall of the grouting pipe body is provided with a plurality of layers of clamping rings along the axial direction; the grouting unit is selectively fixed to each depth of the grouting pipe based on the clamping ring structure, and concrete slurry is input into the grouting pipe, and layered grouting is realized on the construction area through the grouting holes.

[0008] According to a preferred embodiment, the grouting unit includes: a first support plate, a grouting ring, a second support plate, and a grouting rubber airbag; the grouting ring is located on the bottom side of the first support plate, and the first support plate is hingedly connected to the grouting ring via a plurality of first support rods; the second support plate is located on the bottom side of the grouting ring, and the grouting ring and the second support plate are hingedly connected via a plurality of second support rods; the grouting rubber airbag is located in the spindle structure cavity formed by the first support plate, the grouting ring and the second support plate, and the top end of the grouting rubber airbag is connected to a grouting pipe; the grouting ring has a telescopic structure, and when grouting is carried out, the size of the grouting ring body increases, and the grouting rubber airbag is selectively connected to the grouting structure of the grouting ring through the connecting pipe; when the grouting ring finishes grouting, the size of the grouting ring body decreases, and the grouting pipeline of the grouting rubber airbag and the grouting structure of the grouting ring is closed.

[0009] According to a preferred embodiment, the grouting ring includes two fan-shaped grouting boxes, and the two grouting boxes are movably connected via connecting pieces; a guide groove is provided on the side wall of the grouting box, and a guide rail is provided on the side wall of the connecting piece, and the guide rail is clamped in the guide groove, so that the connecting piece can be retracted or extended from the grouting box, thereby completing the change of the ring size of the grouting ring.

[0010] According to a preferred embodiment, a side hole is provided on the inner side wall of the grouting box, a bottom hole is provided on the bottom plate of the grouting box, and the grouting rubber airbag is connected with the side hole via a connecting pipe.

[0011] According to a preferred embodiment, when grouting is performed, the connector is extended to the grouting box, a conducting space is formed between the side hole and the bottom hole, and the concrete slurry is input to the grouting pipe through the bottom hole.

[0012] According to a preferred embodiment, when grouting is finished, the connecting piece is retracted into the grouting box, and the connecting piece completes the separation of the conducting space between the side hole and the bottom hole.

[0013] According to a preferred embodiment, a plurality of first connecting shafts are provided at the edge of the first support plate, a plurality of connecting seats are provided on the upper surface of the grouting box, and a second connecting shaft is provided in the connecting seat; a first connecting ring and a second connecting ring are provided at both ends of the first support rod, and the two ends of the first support rod are movably connected to the first connecting shaft and the second connecting shaft respectively; and the two ends of the second support rod are hingedly connected to the bottom surface of the grouting box and the top surface of the second support plate respectively.

[0014] According to a preferred embodiment, the expansion of the grouting rubber airbag provides power for increasing the size of the grouting ring; when the grouting is completed, the gravity of the first support rod, the grouting ring, the second support rod and the second support plate provides power for reducing the size of the grouting ring.

[0015] According to a preferred embodiment, a through hole is provided at the center of the first support plate, and the grouting pipe passes through the through hole and is connected to the grouting rubber airbag.

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

[0017] A layered grouting method adopts the above-mentioned layered grouting device, and the layered grouting method comprises: placing the grouting unit at the bottom end of the grouting pipe, and limiting the position by the clamping ring to realize the bottom grouting of the grouting pipe, after the bottom layer grouting is completed, the grouting unit is fixed layer by layer in the direction toward the top of the grouting pipe by the clamping ring, and the grouting operation is performed at the corresponding height positions until the grouting operation at each depth of the grouting pipe is completed, and the layered grouting of the construction area is realized by the grouting hole of the grouting pipe.

[0018] 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.

[0019] Beneficial effects of the present invention:

[0020] The device of the present invention has a reserved clamp ring design for the grouting pipe, and a first support rod, a second support rod, a first support plate, a second support plate and a grouting ring to form an extendable support frame, which is then combined with a grouting rubber airbag and a grouting pipe. This not only allows the device to be reused to ensure the filling degree of each layered grouting, but also effectively limits uneven pressure relief during the grouting process to ensure the quality of the layered grouting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the grouting unit in the layered grouting device of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the grouting ring in the layered grouting device of the present invention;

[0023] Figure 3 It is a schematic diagram of the connection relationship between the grouting ring and the grouting rubber airbag in the layered grouting device of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the first support plate in the layered grouting device of the present invention;

[0025] Figure 5 It is a schematic diagram of the connection relationship between the first support rod and the grouting ring in the layered grouting device of the present invention;

[0026] Figure 6It is a schematic diagram of inserting a grouting unit in a layered grouting device of the present invention;

[0027] Figure 7 It is a structural schematic diagram of a grouting unit in a layered grouting device of the present invention when it is fixed;

[0028] Figure 8 It is a schematic diagram of the structure of the grouting pipe in the layered grouting device of the present invention;

[0029] Among them, 1-first support plate, 1a-through hole, 1b-first connecting shaft, 2-first support rod, 2a-first connecting ring, 2b-second connecting ring, 3-grouting ring, 31-grouting box, 31a-guide groove, 32-connecting piece, 32a-guide rail, 33-limiting block, 34-side hole, 35-bottom hole, 36-connecting seat, 36a-second connecting shaft, 4-second support rod, 5-second support plate, 6-grouting rubber airbag, 7-connecting pipe, 8-first slurry delivery pipe, 9-second slurry delivery pipe, 10-grouting pipe, 101-clamping ring, 102-slurry outlet hole, 103-conical bottom. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Embodiment 1:

[0037] refer to Figures 1 to 8 As shown, a layered grouting device is shown, and the layered grouting device includes: a grouting unit and a grouting pipe 10.

[0038] A plurality of grouting holes 102 are provided on the side wall of the grouting pipe 10 along the axial direction, and a plurality of layers of clamping rings 101 are provided on the inner wall of the grouting pipe 10 along the axial direction.

[0039] The grouting unit is fixed at various depths of the grouting pipe 10 based on the clamp ring 101 structure, and concrete slurry is input into the grouting pipe 10 , and layered grouting is performed on the construction area through the slurry outlet 102 .

[0040] Preferably, a clamp ring 101 is provided on the inner wall of the steel pipe of the grouting pipe 10 at a certain spacing h1 along the circumferential direction. Secondly, in order to ensure the grouting efficiency, it is necessary to provide grouting holes 102 around the micro steel pipe, and the hole diameter and hole spacing h2 can be determined according to actual needs. Finally, the bottom of the grouting pipe 10 is sealed with a conical bottom 103 to facilitate the burial of the grouting pipe 10 in the pile.

[0041] Preferably, the grouting unit comprises: a first support plate 1 , a grouting ring 3 , a second support plate 5 , and a grouting rubber airbag 6 .

[0042] Preferably, the grouting ring 3 has a telescopic structure. When grouting is carried out, the size of the grouting ring 3 increases, and the grouting rubber airbag 6 is selectively connected to the grouting structure of the grouting ring 3 through the connecting pipe 7; when the grouting ring 3 finishes grouting, the size of the grouting ring 3 decreases, and the grouting pipeline of the grouting rubber airbag 6 and the grouting structure of the grouting ring 3 is closed.

[0043] Specifically, the grouting ring 3 includes two fan-shaped grouting boxes 31, and the two grouting boxes 31 are movably connected via connecting pieces 32. A guide groove 31a is provided on the side wall of the grouting box 31, and a guide rail 32a is provided on the side wall of the connecting piece 32. The guide rail 32a is clamped in the guide groove 31a, so that the connecting piece 32 can be retracted or extended from the grouting box 31, thereby completing the change of the ring size of the grouting ring 3.

[0044] Preferably, a limit block 33 is further provided in the grouting box 31 , and the limit block 33 is fixed in the box body to prevent the connecting member 32 from excessively shrinking.

[0045] Preferably, the grouting ring 3 is located at the bottom side of the first support plate 1 , and the first support plate 1 is hingedly connected to the grouting ring 3 via a plurality of first support rods 2 .

[0046] Specifically, a plurality of first connecting shafts 1b are provided at the edge of the first support plate 1, a plurality of connecting seats 36 are provided on the upper surface of the grouting box 31, and a second connecting shaft 36a is provided in the connecting seat 36. A first connecting ring 2a and a second connecting ring 2b are provided at both ends of the first support rod 2, and both ends of the first support rod 2 are movably connected to the first connecting shaft 1b and the second connecting shaft 36a.

[0047] Further, preferably, a through hole 1 a is provided at the center of the first support plate 1 , and a grouting pipe passes through the through hole 1 a and is connected to the grouting rubber airbag 6 .

[0048] Preferably, the second support plate 5 is located at the bottom side of the grouting ring 3 , and the grouting ring 3 and the second support plate 5 are hingedly connected via a plurality of second support rods 4 .

[0049] Specifically, two ends of the second support rod 4 are hingedly connected to the bottom surface of the grouting box 31 and the top surface of the second support plate 5 respectively.

[0050] Preferably, the grouting rubber airbag 6 is located in the spindle structure cavity formed by the first support plate 1, the grouting ring 3 and the second support plate 5, and the top of the grouting rubber airbag 6 is connected to a slurry delivery pipe. In this embodiment, the slurry delivery pipe includes a first slurry delivery pipe 8 and a second slurry delivery pipe 9, the first slurry delivery pipe 8 is connected to the grouting rubber airbag 6 and the second slurry delivery pipe 9 respectively, the first slurry delivery pipe 8 is a plastic steel slurry delivery pipe, and the second slurry delivery pipe 9 is a flexible slurry delivery pipe.

[0051] Preferably, a side hole 34 is provided on the inner side wall of the grouting box 31 , a bottom hole 35 is provided on the bottom plate of the grouting box 31 , and the grouting rubber airbag 6 is connected to the side hole 34 via a connecting pipe 7 .

[0052] When grouting is performed, the connector 32 extends to the grouting box 31 , and a conducting space is formed between the side hole 34 and the bottom hole 35 , and the concrete slurry is input to the grouting pipe 10 through the bottom hole 35 .

[0053] When the grouting is finished, the connecting piece 32 is retracted in the grouting box 31 , and the connecting piece 32 completes the partition of the conducting space between the side hole 34 and the bottom hole 35 .

[0054] Specifically, during the grouting process, the expansion of the grouting rubber airbag 6 provides power for the increase in the size of the ring body of the grouting ring 3. When the grouting is completed, the gravity of the first support rod 2, the grouting ring 3, the second support rod 4 and the second support plate 5 provides power for the reduction in the size of the ring body of the grouting ring 3.

[0055] Example 2

[0056] Based on Example 1, Figure 6 and Figure 7 This embodiment also discloses a layered grouting method, which uses the layered grouting device described in Example 1.

[0057] The layered grouting method includes: placing the grouting unit at the bottom end of the grouting pipe 10, and limiting the position by the clamping ring 101 to realize grouting at the bottom of the grouting pipe 10; after the bottom layer grouting is completed, the grouting unit is fixed layer by layer in the direction toward the top of the grouting pipe 10 by the clamping ring 101, and grouting operations are performed at corresponding height positions until the grouting operations at various depths of the grouting pipe 10 are completed, and layered grouting is performed on the area to be constructed by the grouting hole 102 of the grouting pipe 10.

[0058] Specifically, the grouting pressure device is started to input concrete slurry into the grouting rubber airbag 6, and the grouting rubber airbag 6 gradually expands. The first support rod 2 and the second support rod 4 and the first support plate 1 and the second support plate 5 limit the expansion of the upper and lower ends of the grouting rubber airbag 6, so that the grouting rubber airbag 6 radially expands and is tightly attached to the inner side of the grouting ring 3, and the outer side of the grouting ring 3 forms a squeezed state with the inner wall of the grouting pipe 10. The telescopic grouting ring 3 is gradually stretched, thereby driving the connecting piece 32 to slide along the guide groove 31a, further exposing the bottom hole 35 at the bottom of the grouting ring 3 for slurry discharge, so that the grouting rubber airbag 6 is connected with the bottom hole 35. The pressurized grouting is continued, and the air pressure in the intended grouting section gradually increases. The grouting ring 3 returns to the top to the clamping ring 101 and is restricted to rise, ensuring that each layer of grouting can reach the designed fullness, effectively avoiding the problem of uneven pressure relief of the pile body, and achieving the purpose of layered grouting.

[0059] After the grouting of the proposed grouting layer is completed, the grouting pressurizing machine is turned off, and the slurry in the grouting rubber airbag 6 continues to be retained along the bottom hole 35 through the connecting pipe 7 under the influence of gravity, so that the internal air pressure of the grouting rubber airbag 6 gradually decreases, and the telescopic grouting ring 3 retracts. The gravity of the first support rod 2, the grouting ring 3, the second support rod 4 and the second support plate 5 provides power for the ring body size of the grouting ring 3 to be reduced. At this time, the straight outer diameter of the retracted grouting ring 3 is smaller than the inner diameter of the clamping ring 101, and the first grouting pipe 8 can be pulled back along the inside of the grouting pipe 10 to lift the grouting ring 3 to the next proposed grouting layer. In this way, the grouting is backfilled from the bottom end to the top end of the grouting pipe 10, and finally the layered reinforcement of the foundation is achieved.

[0060] 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, characterized in that: The layered grouting device comprises: a grouting unit and a grouting pipe (10); a plurality of grouting holes (102) are provided on the side wall of the grouting pipe (10) along the axial direction; and a plurality of layers of clamping rings (101) are provided on the inner wall of the grouting pipe (10) along the axial direction; The grouting unit is selectively fixed to the grouting pipe (10) at various depths based on the clamping ring (101) structure, and concrete slurry is input into the grouting pipe (10), so that layered grouting is performed on the construction area through the slurry outlet holes (102); The grouting unit comprises: a first support plate (1), a grouting ring (3), a second support plate (5), and a grouting rubber airbag (6); The grouting ring (3) is located on the bottom side of the first support plate (1), and the first support plate (1) is hingedly connected to the grouting ring (3) via a plurality of first support rods (2); The second support plate (5) is located at the bottom side of the grouting ring (3), and the grouting ring (3) and the second support plate (5) are hingedly connected via a plurality of second support rods (4); The grouting rubber airbag (6) is located in a spindle structure cavity formed by the first support plate (1), the grouting ring (3) and the second support plate (5), and the top end of the grouting rubber airbag (6) is connected to a grouting pipe; The grouting ring (3) has a telescopic structure. When grouting is performed, the size of the grouting ring (3) increases, and the grouting rubber airbag (6) is selectively connected to the grouting structure of the grouting ring (3) via the connecting pipe (7); When the grouting of the grouting ring (3) is finished, the size of the ring body of the grouting ring (3) is reduced, and the grouting rubber airbag (6) and the grouting pipeline of the grouting structure of the grouting ring (3) are closed; The grouting ring (3) comprises two fan-shaped grouting boxes (31), and the two grouting boxes (31) are movably connected via connecting pieces (32); A guide groove (31a) is provided on the side wall of the grouting box (31), and a guide rail (32a) is provided on the side wall of the connecting piece (32); the guide rail (32a) is snap-connected to the guide groove (31a), so that the connecting piece (32) can be retracted or extended from the grouting box (31), thereby completing the change of the ring body size of the grouting ring (3); The inner side wall of the grouting box (31) is provided with a side hole (34); A plurality of first connecting shafts (1b) are provided at the edge of the first supporting plate (1).

2. The layered grouting device according to claim 1, characterized in that: A bottom hole (35) is provided on the bottom plate of the grouting box (31), and the grouting rubber airbag (6) is connected to the side hole (34) via a connecting pipe (7).

3. The layered grouting device according to claim 2, characterized in that: When grouting is performed, the connection piece (32) extends out from the grouting box (31), a conducting space is formed between the side hole (34) and the bottom hole (35), and concrete slurry is input into the grouting pipe (10) through the bottom hole.

4. The layered grouting device according to claim 2, characterized in that: When grouting is finished, the connecting piece (32) shrinks in the grouting box (31), and the connecting piece (32) completes the separation of the conducting space between the side hole (34) and the bottom hole (35).

5. The layered grouting device according to claim 1, characterized in that: A plurality of connection seats (36) are provided on the upper surface of the grouting box (31), and a second connection shaft (36a) is provided inside the connection seat (36); a first connection ring (2a) and a second connection ring (2b) are provided at both ends of the first support rod (2), and both ends of the first support rod (2) are movably connected to the first connection shaft (1b) and the second connection shaft (36a); The two ends of the second support rod (4) are respectively hingedly connected to the bottom surface of the grouting box (31) and the top surface of the second support plate (5).

6. The layered grouting device according to claim 5, characterized in that: During grouting, the expansion of the grouting rubber airbag (6) provides power for increasing the size of the ring body of the grouting ring (3); when grouting is finished, the gravity of the first support rod (2), the grouting ring (3), the second support rod (4) and the second support plate (5) provides power for decreasing the size of the ring body of the grouting ring (3).

7. The layered grouting device according to claim 1, characterized in that: A through hole (1a) is provided at the center of the first support plate (1), and the grouting pipe passes through the through hole (1a) and is connected to the grouting rubber airbag (6).

8. A layered grouting method, characterized in that: Using the layered grouting device according to any one of claims 1 to 7, the layered grouting method comprises: The grouting unit is placed at the bottom end of the grouting pipe (10), and the clamping ring (101) is used to limit the position, so as to realize grouting at the bottom of the grouting pipe (10). After the grouting at the bottom layer is completed, the grouting unit is fixed layer by layer in the direction toward the top of the grouting pipe (10) by the clamping ring (101), and the grouting operation is performed at the corresponding height positions until the grouting operation at each depth of the grouting pipe (10) is completed, and the grouting hole (102) of the grouting pipe (10) is used to realize layered grouting of the construction area.

Images