Pile bottom grouting method adopting hollow rubber bag

Abstract

According to the pile bottom grouting method adopting the hollow rubber bags, a pile cage, grouting pipes and steel plates are included, the steel plates are fixedly connected to the bottom ends of the pile cage and the grouting pipes, the rubber bags are arranged at the bottoms of the steel plates, the number of the grouting pipes is two, one grouting pipe penetrates through the steel plates to extend outwards, and the other grouting pipe is communicated with the rubber bags; the expansion pieces are arranged at the bottom end of the steel plate, and the expansion pieces are used for fixing the rubber bag and can be enlarged along with expansion of the rubber bag; each expansion part comprises a fixing ring plate and a plurality of mounting frames, the mounting frames are annularly arranged around the fixing ring plate, the fixing ring plate and the mounting frames are fixed to the fixing ring plate through bolts, and the expansion parts are fixedly connected with the mounting frames respectively. By arranging the expansion part, the expansion part can be conveniently and annularly fixed, when the pile cage goes deep into the drill hole, the expansion part can play a role in keeping the rubber bag, and the problem that a traditional rubber bag is extruded to deform when going deep into the drill hole, and expansion is not uniform easily is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pile bottom grouting, and particularly to a pile bottom grouting method using a hollow rubber pack. Background Art

[0002] In the existing pile bottom grouting technology, there are some deficiencies in the traditional grouting method: for example, during the grouting process after the bottom of the drilling hole is expanded, due to the smooth outer wall of the hollow rubber pack, the contact and solidification effect with the cement slurry is limited, resulting in insufficient stability and bearing capacity of the structure after grouting. Especially in soft soil foundations or environments with groundwater, the traditional grouting method is prone to problems such as slurry loss and uneven grouting due to the weak bonding between the rubber pack and the cement slurry, thereby affecting the bearing capacity and durability of the pile foundation; in addition, in actual operation, the traditional rubber pack is prone to being squeezed and deformed when penetrating into the drilling hole, resulting in uneven expansion uniformity subsequently. Therefore, a pile bottom grouting method using a hollow rubber pack is proposed to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a pile bottom grouting method using a hollow rubber pack is proposed.

[0004] To achieve the above purpose, the present invention adopts the following technical scheme: a pile bottom grouting method using a hollow rubber pack, including a pile cage, a grouting pipe and a steel plate. The bottom ends of the pile cage and the grouting pipe are both fixedly connected with a steel plate. A rubber pack is arranged at the bottom of the steel plate. The grouting pipe includes two groups, one group extends outward through the steel plate, and the other group is communicated with the rubber pack; it also includes an expansion member, which is arranged at the bottom end of the steel plate. A plurality of the expansion members are used to fix the rubber pack and can increase as the rubber pack expands; the expansion member includes a fixed ring plate and a plurality of mounting frames. The plurality of mounting frames are arranged annularly around the fixed ring plate, and the fixed ring plate and the plurality of mounting frames are fixed on the fixed ring plate by bolts. The plurality of expansion members are respectively fixedly connected with the plurality of mounting frames.

[0005] As a further description of the above technical scheme: the expansion member includes a plurality of fixing bands. One end of each of the plurality of fixing bands is fixedly connected with an integral first convex block. The other end of each of the plurality of fixing bands is fixedly connected with an integral second convex block. A hollow groove for the fixing band to slide is formed in the second convex block, and the plurality of fixing bands are connected end to end to form an expandable expansion member.

[0006] As a further description of the above technical scheme: anti-slip teeth are fixedly connected to the outer wall of the fixing band. The inner wall of the fixing band contacts the outer wall of the rubber pack. An inclined groove is fixedly connected to the side wall of the fixing band. An inclined tooth matching with the inclined groove is fixedly connected to the inner wall of the hollow groove, so that the fixing band slides unidirectionally in the hollow groove.

[0007] As a further description of the above technical solution: The mounting bracket includes a first fixing plate and a second fixing plate. Grooves are provided at the contact portions of the first fixing plate and the second fixing plate, so that the first fixing plate and the second fixing plate are at the same height when they are attached.

[0008] As a further description of the above technical solution: Reinforcing teeth are fixedly connected to the contact portions of the first fixing plate and the second fixing plate. When the first fixing plate and the second fixing plate are in contact, the two reinforcing teeth are fitted together.

[0009] The present invention has the following beneficial effects: Compared with the prior art, in the bottom grouting method of a pile using a hollow rubber pack, by providing an expansion member, the rubber pack is wrapped inside the expansion member. On the one hand, it is convenient to perform circumferential fixation on the expansion member. On the other hand, when inserting a pile cage into a borehole, the expansion member can play a role in maintaining the rubber pack, reducing the problem that the traditional rubber pack is prone to uneven expansion due to being squeezed and deformed when penetrating deep into the borehole; and the anti-slip teeth on the outer wall of the fixing belt help to penetrate into the borehole wall. After the cement slurry solidifies, the anti-slip teeth can increase the contact area between the fixing belt and the cement slurry, thereby helping to improve the subsequent overall strength and durability.

[0010] 2. Compared with the prior art, in the bottom grouting method of a pile using a hollow rubber pack, by separately arranging the first fixing plate and the second fixing plate, if a single part is damaged during assembly, it can be replaced, thereby improving the utilization rate of parts, reducing costs, and facilitating the stable fixation of the mounting bracket composed of the first fixing plate and the second fixing plate on the steel plate, preventing deformation and damage at the mounting bracket when the rubber pack expands and affecting the reinforcement effect of the cooperation between the rubber pack and the pile cage; and the two fixing plates are at the same height after installation. When installed on the fixed ring plate, there will be no problem of different heights affecting the fixing strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of the overall first perspective structure of a bottom grouting method of a pile using a hollow rubber pack proposed by the present invention; Figure 2 is a schematic diagram of the overall second perspective structure of a bottom grouting method of a pile using a hollow rubber pack proposed by the present invention; Figure 3 is a schematic diagram of the overall third perspective structure of a bottom grouting method of a pile using a hollow rubber pack proposed by the present invention; Figure 4 is Figure 3 an enlarged schematic diagram of part A in Figure 5 is a schematic diagram of the cooperation between the first fixing plate and the second fixing plate of a bottom grouting method of a pile using a hollow rubber pack proposed by the present invention; Figure 6Schematic cross-sectional structure diagram of the second convex block of a pile bottom grouting method using a hollow rubber pack proposed by the present invention.

[0012] Legend: 1. Pile cage; 2. Grouting pipe; 3. Steel plate; 4. Rubber pack; 5. Expanding member; 6. Fixed ring plate; 7. Mounting frame; 8. Bolt; 9. Fixed belt; 10. First convex block; 11. Second convex block; 12. Hollow groove; 13. Anti-slip teeth; 14. First fixing plate; 15. Second fixing plate; 16. Groove; 17. Reinforcing teeth; 18. Helical teeth; 19. Helical groove. Specific implementation manner

[0013] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0014] Refer to Figures 1-6 , a pile bottom grouting method using a hollow rubber pack provided by the present invention: including a pile cage 1, a grouting pipe 2 and a steel plate 3. The bottom ends of the pile cage 1 and the grouting pipe 2 are fixedly connected with the steel plate 3. A rubber pack 4 is arranged at the bottom of the steel plate 3. The grouting pipe 2 includes two groups. One group of the grouting pipes 2 extends outward through the steel plate 3, and the pipe orifice faces downward. The other group of the grouting pipes 2 is communicated with the rubber pack 4, and the pipe orifice faces the inside of the rubber pack 4; it further includes an expanding member 5, which is arranged at the bottom end of the steel plate 3. A plurality of expanding members 5 are used to fix the rubber pack 4 and can increase as the rubber pack 4 expands.

[0015] The expanding member 5 includes a fixed ring plate 6 and a plurality of mounting frames 7. The plurality of mounting frames 7 are arranged annularly around the fixed ring plate 6, and the fixed ring plate 6 and the plurality of mounting frames 7 are fixed on the fixed ring plate 6 by bolts 8. A plurality of expanding members 5 are respectively fixedly connected with the plurality of mounting frames 7.

[0016] The expansion member 5 includes a plurality of fixing bands 9. One end of each of the plurality of fixing bands 9 is fixedly connected with an integral first bump 10, and the other end of each of the plurality of fixing bands 9 is fixedly connected with an integral second bump 11. A hollow groove 12 for the fixing band 9 to slide is formed in the second bump 11, and the plurality of fixing bands 9 are connected end to end to form an expandable expansion member 5. By providing the expansion member 5, during assembly, first, the expansion member 5 and the fixing ring plate 6 are fixed on the steel plate 3 through bolts 8, and then the first bump 10 at one end of one of the fixing bands 9 is inserted into the hollow groove 12, so that the rubber capsule 4 is wrapped inside the expansion member 5. On the one hand, it is convenient to perform annular fixation on the expansion member 5. On the other hand, when the pile cage 1 is inserted into the drill hole, the expansion member 5 can play a role in holding the rubber capsule 4, reducing the problem that the traditional rubber capsule 4 is prone to uneven expansion due to being squeezed and deformed when going deep into the drill hole.

[0017] The outer wall of the fixing band 9 is fixedly connected with anti-slip teeth 13. The inner wall of the fixing band 9 contacts the outer wall of the rubber capsule 4. The anti-slip teeth 13 and the fixing band 9 are of an integral structure, and its material is a metal or fiber belt structure. The advantage of this setting is that after the pile cage 1 and the rubber capsule 4 are placed in the drill hole and expanded, the rubber capsule 4 causes the expansion member 5 composed of a plurality of fixing bands 9 to expand. During this process, the anti-slip teeth 13 on the outer wall of the fixing band 9 help to penetrate into the hole wall, and after the cement slurry solidifies, the anti-slip teeth 13 can increase the contact between the fixing band 9 and the cement slurry, thereby helping to improve the subsequent overall fixing strength.

[0018] The side wall of the fixing band 9 is fixedly connected with an inclined groove 19, and the inner wall of the hollow groove 12 is fixedly connected with an inclined tooth 18 that cooperates with the inclined groove 19 to enable the fixing band 9 to slide unidirectionally in the hollow groove 12. The fixing band 9 is initially in a contracted state, and the rubber capsule 4 is located inside the expansion member 5 in the contracted state. When the rubber capsule 4 expands, the fixing bands 9 connected end to end slide in the hollow groove 12. The advantage of this setting is that, on the one hand, the expansion member 5 can stably support the rubber capsule 4 when contracting, and on the other hand, it will not affect the expansion of the rubber capsule 4 after the rubber capsule 4 expands.

[0019] The mounting bracket 7 includes a first fixing plate 14 and a second fixing plate 15. Grooves 16 are formed in the contact portions of the first fixing plate 14 and the second fixing plate 15, so that when the first fixing plate 14 and the second fixing plate 15 are fitted together, they are at the same height. When the two fixing plates at the same height are installed on the fixing ring plate 6, there will be no problem of different heights affecting the fixing strength; since the first fixing plate 14 and the second fixing plate 15 are separately arranged, if a single part is damaged during assembly, it can be replaced, thereby improving the utilization rate of parts and reducing costs.

[0020] Reinforcing teeth 17 are fixedly connected to the contact portions of the first fixing plate 14 and the second fixing plate 15. When the first fixing plate 14 and the second fixing plate 15 are in contact, the two reinforcing teeth 17 are fitted together. The advantage of this setting is that it is convenient to stably fix the mounting bracket 7 composed of the first fixing plate 14 and the second fixing plate 15 on the steel plate 3, preventing deformation and damage at the mounting bracket 7 when the rubber capsule 4 expands, which may affect the reinforcement effect of the cooperation between the rubber capsule 4 and the pile cage 1.

[0021] Working principle: During assembly, first, the expansion member 5 and the fixed ring plate 6 are fixed to the steel plate 3 by bolts 8. Then, the first convex block 10 at one end of one of the fixing straps 9 is inserted into the hollow groove 12, so that the rubber capsule 4 is wrapped around the expansion member 5. Next, the assembled unit is placed into the drilling hole.

[0022] After the pile cage 1 and the rubber capsule 4 are placed in the drilling hole and expanded, the rubber capsule 4 causes the expansion member 5 composed of a plurality of fixing straps 9 to expand. During this process, the anti-slip teeth 13 on the outer wall of the fixing strap 9 help to penetrate into the hole wall. After the cement slurry solidifies, the anti-slip teeth 13 can increase the contact between the fixing strap 9 and the cement slurry.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pile bottom grouting method using a hollow rubber package, comprising a pile cage (1), a grouting pipe (2) and a steel plate (3), characterized in that: Both the bottom ends of the pile cage (1) and the grouting pipe (2) are fixedly connected with a steel plate (3). A rubber capsule (4) is arranged at the bottom of the steel plate (3). The grouting pipe (2) includes two groups, one of which extends outward through the steel plate (3), and the other group is communicated with the rubber capsule (4). It further includes an expander (5), which is arranged at the bottom end of the steel plate (3). A plurality of the expanders (5) are used to fix the rubber capsule (4) and can increase as the rubber capsule (4) expands.

2. The pile bottom grouting method using a hollow rubber pack according to claim 1, characterized in that: The expander (5) includes a fixed ring plate (6) and a plurality of mounting brackets (7). The plurality of mounting brackets (7) are arranged in a circular pattern around the fixed ring plate (6), and the fixed ring plate (6) and the plurality of mounting brackets (7) are fixed on the fixed ring plate (6) by bolts (8). The plurality of expanders (5) are respectively fixedly connected with the plurality of mounting brackets (7).

3. A pile bottom grouting method using a hollow rubber pack according to claim 2, characterized in that: The expander (5) includes a plurality of fixing belts (9). One end of each of the plurality of fixing belts (9) is fixedly connected with an integral first convex block (10), and the other end of each of the plurality of fixing belts (9) is fixedly connected with an integral second convex block (11). A hollow groove (12) for the fixing belt (9) to slide is formed in the second convex block (11), and the plurality of fixing belts (9) are connected end to end to form an expandable expander (5).

4. A method for grouting at the bottom of a pile using a hollow rubber pack as claimed in claim 3, characterized in that: Anti-slip teeth (13) are fixedly connected to the outer wall of the fixing belt (9), and the inner wall of the fixing belt (9) contacts the outer wall of the rubber capsule (4).

5. A pile bottom grouting method using a hollow rubber pack according to claim 4, characterized in that: An inclined groove (19) is fixedly connected to the side wall of the fixing belt (9), and an inclined tooth (18) matched with the inclined groove (19) is fixedly connected to the inner wall of the hollow groove (12), so that the fixing belt (9) slides unidirectionally in the hollow groove (12).

6. A pile bottom grouting method using a hollow rubber pack according to claim 5, characterized in that: The mounting bracket (7) includes a first fixing plate (14) and a second fixing plate (15). Grooves (16) are formed in the contact portions of the first fixing plate (14) and the second fixing plate (15), so that the first fixing plate (14) and the second fixing plate (15) are at the same height when they are attached to each other.

7. A method for grouting at the pile bottom using a hollow rubber pack according to claim 6, characterized in that: Reinforcing teeth (17) are fixedly connected to the contact portions of the first fixing plate (14) and the second fixing plate (15). When the first fixing plate (14) and the second fixing plate (15) are in contact, the two reinforcing teeth (17) are engaged with each other.

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