Foundation pile reinforcing device based on steel plate rubber bag

Abstract

The invention discloses a foundation pile reinforcing device based on a steel plate rubber package, and relates to the technical field of foundation pile reinforcing appliances, the foundation pile reinforcing device comprises a plurality of groups of steel plate hoops arranged on the outer side of a foundation pile, and reinforcing rib plates are mounted on the outer sides of the steel plate hoops; through installation of the protruding points and the inner and outer steel bar rings, the friction force between the rubber wrapping layer and the steel plate hoop and the foundation pile can be increased, the inner and outer steel bar rings can prevent vertical steel bars from deforming, the foundation pile is more stable, meanwhile, corrosion bodies are prevented from entering the inner side of the steel plate hoop through deformation of the rubber wrapping layer, reinforcement failure is avoided, and the maintenance cost is reduced; by installing a first steel plate rubber bag, grouting is conveniently conducted in the first steel plate rubber bag to enable the first steel plate rubber bag to expand, then the cross section area of the foundation pile in the soil body is increased, the bearing capacity of the foundation pile is improved, and the stability of the foundation is prevented from being damaged; and finally, the problems that the original foundation stability is damaged by a traditional section increasing method and the maintenance cost is increased due to the fact that steel in a steel-encased method is easily rusted in a corrosive environment are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation reinforcement tools, and particularly relates to a pile foundation reinforcement device based on steel plate glue wrapping. Background Art

[0002] In the field of construction engineering, pile foundations, as key load-bearing components of structures such as buildings or bridges, need to bear the vertical loads and horizontal forces of the superstructure for a long time. However, under the influence of factors such as complex geological conditions, environmental erosion (such as groundwater corrosion, freeze-thaw cycle), or surrounding construction disturbances, problems such as concrete cracking, steel bar corrosion, and bearing capacity decline may occur in pile foundations, threatening the structural safety. Common pile foundation reinforcement methods include the enlarged cross-section method. This method increases the cross-sectional area of the pile foundation by pouring fresh concrete or reinforced concrete layers around the pile foundation to improve the bearing capacity. However, the construction period is long, the soil around the pile foundation needs to be excavated, which may damage the stability of the original foundation, and the bonding surface between the newly added concrete layer and the old pile is prone to peeling, resulting in poor collaborative stress effect. The external steel reinforcement method uses angle steel, steel plates, etc. to wrap the pile foundation, forms a steel sleeve by welding lacing plates, and uses the strength of steel to improve the compressive and flexural resistance of the pile foundation. However, a cementitious material (such as epoxy resin) needs to be poured between the steel components and the pile foundation. However, the cementitious layer is prone to aging and cracking due to changes in environmental temperature and humidity or long-term load effects, resulting in reinforcement failure. The steel is exposed to a corrosive environment and is prone to rust, requiring additional anti-corrosion treatment, increasing the maintenance cost. Therefore, the above problems need to be solved. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies in the prior art and propose a pile foundation reinforcement device based on steel plate glue wrapping.

[0004] To achieve the above purpose, the present invention adopts the following technical solution: A pile foundation reinforcement device based on steel plate glue wrapping includes multiple groups of steel plate hoops arranged on the outer side of the pile foundation. Reinforcing rib plates are installed on the outer side of the steel plate hoops. A steel plate ring is installed at the bottom end of the lowermost steel plate hoop. A first steel plate glue wrapping is installed at the lower end of the steel plate ring. A grouting assembly is installed inside the pile foundation, and a glue wrapping layer is injected between the pile foundation and the steel plate hoops.

[0005] Preferably, multiple vertical steel bars are equidistantly installed inside the pile foundation. Outer steel bar rings are fixedly connected to the outer sides of the vertical steel bars. Inner steel bar rings are fixedly connected to the inner sides of the vertical steel bars. The outer steel bar rings and the inner steel bar rings are alternately installed on the vertical steel bars.

[0006] Preferably, the grouting assembly includes a first grouting pipe and a second grouting pipe installed inside the pile foundation. A first grouting port is installed at the bottom end of the first grouting pipe. The first grouting port is directly above the opening of the first steel plate glue wrapping, and a floating bladder is installed at the lower end of the first grouting pipe.

[0007] Preferably, a chute is longitudinally and penetratingly formed on the floating bladder, the second grouting pipe is inserted into the chute, a second grouting port is installed at the bottom end of the second grouting pipe, and a sealing groove is formed on the second grouting port.

[0008] Preferably, a plurality of convex points are formed on the inner side surface of the steel plate hoop, and ear plates are fixedly connected to both sides of the steel plate hoop. A plurality of groups of the steel plate hoops are connected through the ear plates.

[0009] Preferably, a steel plate ring is sleeved outside the steel plate circle, and an annular expansion groove with a T-shaped cross section is formed inside the steel plate circle.

[0010] Preferably, a second steel plate rubber pack is installed at the top end of the first steel plate rubber pack. After expansion, the second steel plate rubber pack is in a T shape. Two support steel plates are installed inside the connection between the second steel plate rubber pack and the first steel plate rubber pack, and the second steel plate rubber pack is located in the annular expansion groove inside the steel plate circle.

[0011] Preferably, a sealing washer matched with the sealing groove is installed on the first steel plate rubber pack. An installation plate is fixedly connected to the lower end of the sealing washer. A torsion spring is installed on the installation plate. A baffle is fixedly connected to the torsion spring, and the diameter of the baffle is smaller than the inner diameter of the second grouting port.

[0012] Preferably, the reinforcing rib plates are installed at intervals on the circumferential side of the steel plate hoop, and the reinforcing rib plates are triangular.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: By installing the convex points and the inner and outer steel bar rings, the friction force between the rubber pack layer, the steel plate hoop and the foundation pile can be increased, and the inner and outer steel bar rings can prevent the vertical steel bars from deforming. Thus, while making the foundation pile more stable, the deformation of the rubber pack layer is used to prevent the corrosive substance from entering the inner side of the steel plate hoop, avoiding the failure of reinforcement and reducing the maintenance cost. By installing the first steel plate rubber pack, it is convenient to grout into the first steel plate rubber pack to make it expand, thereby increasing the cross-sectional area of the foundation pile inside the soil body, improving the bearing capacity of the foundation pile, and avoiding the destruction of the foundation stability. Moreover, by expanding the second steel plate rubber pack in the expansion groove, the connection between the first steel plate rubber pack and the steel plate circle is strengthened. Finally, the problems that the traditional method of increasing the cross section will damage the original foundation stability and the steel in the method of externally wrapping steel is prone to rust in a corrosive environment, increasing the maintenance cost, are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a schematic three-dimensional structure diagram of the whole device of the present invention; Figure 2 is a schematic diagram of the foundation pile structure of the present invention; Figure 3 Schematic diagram of the overall three-dimensional structure of the device of the present invention; Figure 4 Schematic diagram of the grouting structure of the present invention; Figure 5 Schematic diagram of the reinforcing rib structure of the present invention; Figure 6 Schematic diagram of the steel plate hoop structure of the present invention; Figure 7 Schematic diagram of the steel plate ring of the present invention; Figure 8 Top view of the first steel plate rubber package structure of the present invention; Figure 9 Schematic sectional structure diagram of the first steel plate rubber package of the present invention; Figure 10 Schematic diagram of the baffle structure of the present invention; Figure 11 of the present invention Figure 3 Enlarged schematic diagram of the structure of part A; Figure 12 of the present invention Figure 9 Enlarged schematic diagram of the structure of part B.

[0015] Numbers in the figure: 1, vertical steel bar; 2, steel plate hoop; 3, reinforcing rib; 4, rubber package layer; 5, first grouting pipe; 6, second grouting pipe; 7, steel plate ring; 8, steel plate ring; 9, first steel plate rubber package; 10, outer steel bar ring; 11, inner steel bar ring; 12, first grouting port; 13, floating bladder; 14, second grouting port; 15, ear plate; 16, convex point; 17, sealing gasket; 18, torsion spring; 19, baffle; 20, second steel plate rubber package; 21, support steel plate. Specific embodiments

[0016] 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.

[0017] Embodiment 1: Refer to Figures 1 - 12, A pile foundation reinforcement device based on a steel plate rubber pack in the present invention includes a pile foundation. A plurality of steel plate hoops 2 are installed on the outer side of the pile foundation. The steel plate hoops 2 facilitate on-site assembly according to different diameters of the pile foundation, improving the versatility of the device. At the same time, it can cooperate with the rubber pack layer 4. A reinforcing rib plate 3 is installed on the outer side of the steel plate hoop 2. The reinforcing rib plate 3 facilitates enhancing the structural strength and stiffness of the steel plate hoop 2, improving the ability of the steel plate hoop 2 to resist external force deformation, and ensuring that when the pile foundation bears a large load, the steel plate hoop 2 can effectively play a reinforcing role. And a steel plate ring 8 is installed at the bottom end of the steel plate hoop 2. The steel plate ring 8 facilitates connecting the vertical steel bars 1 and the first steel plate rubber pack 9. A first steel plate rubber pack 9 is installed at the lower end of the steel plate ring 8. The first steel plate rubber pack 9 facilitates compressing and densifying the formation at the bottom of the pile foundation, and finally forming an enlarged head. And a grouting assembly is installed inside the pile foundation. The grouting assembly facilitates grouting into the pile foundation and the first steel plate rubber pack 9. A rubber pack layer 4 is injected between the pile foundation and the steel plate hoop 2. The rubber pack layer 4 can not only firmly bond the steel plate hoop 2 and the pile foundation together, but also further fill the micro-defects on the surface of the pile foundation, playing a role of sealing and protection, preventing the erosion of harmful substances such as groundwater to the pile foundation. At the same time, when the pile foundation is stressed, the rubber pack layer 4 can evenly transfer the load to the steel plate hoop 2, enhancing the collaborative working ability between the pile foundation and the reinforcement device. A plurality of vertical steel bars 1 are installed equidistantly inside the pile foundation. The vertical steel bars 1 facilitate the installation of the outer steel bar ring 10 and the inner steel bar ring 11. The outer steel bar ring 10 is fixedly connected to the outer side of the vertical steel bar 1, and the inner steel bar ring 11 is fixedly connected to the inner side of the vertical steel bar 1. The outer steel bar ring 10 and the inner steel bar ring 11 prevent the vertical steel bars 1 from deforming. The outer steel bar ring 10 and the inner steel bar ring 11 are alternately installed on the vertical steel bars 1. The grouting assembly includes a first grouting pipe 5 and a second grouting pipe 6 installed inside the pile foundation. The first grouting pipe 5 and the second grouting pipe 6 facilitate grouting into the pile foundation and the inside of the first steel plate rubber pack 9. A first grouting port 12 is installed at the bottom end of the first grouting pipe 5. The first grouting port 12 facilitates cooperating with the first grouting pipe 5. The first grouting port 12 is directly above the opening of the first steel plate rubber pack 9. And a floating bladder 13 is installed at the lower end of the first grouting pipe 5. The floating bladder 13 facilitates driving the first grouting pipe 5 to float during grouting. A chute is longitudinally penetrated on the floating bladder 13. The second grouting pipe 6 is inserted into the chute. And a second grouting port 14 is installed at the bottom end of the second grouting pipe 6. The second grouting port 14 facilitates cooperating with the second grouting pipe 6. A sealing groove is opened on the second grouting port 14.

[0018] Example 2: It is basically the same as the technical solution of Example 1, except that, as Figure 1 , Figure 5 , Figure 6As shown in the figure, a plurality of bumps 16 are provided on the inner side of the steel plate hoop 2. The bumps 16 facilitate increasing the friction between the steel plate hoop 2 and the rubber-coated layer 4 and enhancing its stability. Moreover, ear plates 15 are fixedly connected to both sides of the steel plate hoop 2, which facilitates connecting the steel plate hoop 2. Multiple groups of steel plate hoops 2 are connected through the ear plates 15. A steel plate ring 7 is sleeved outside the steel plate circle 8, which facilitates installation on the ground surface and plays a preliminary stabilizing role for the foundation pile. Moreover, an annular expansion groove with a T-shaped cross-section is provided inside the steel plate circle 8.

[0019] Embodiment 3: It is basically the same as the technical solution of Embodiment 1, except that, as Figure 8 , Figure 9 , Figure 10 shown, a second steel plate rubber coating 20 is installed at the top of the first steel plate rubber coating 9, which facilitates connecting the first steel plate rubber coating 9 and the steel plate ring 7. After expansion, the second steel plate rubber coating 20 is in a T shape, and two support steel plates 21 are installed inside the connection between the second steel plate rubber coating 20 and the first steel plate rubber coating 9, which avoids the fracture of the connection between the first steel plate rubber coating 9 and the second steel plate rubber coating 20 during grouting. Moreover, the second steel plate rubber coating 20 is located in the annular expansion groove inside the steel plate circle 8. A sealing gasket 17 matching the sealing groove is installed on the first steel plate rubber coating 9, which facilitates cooperating with the second grouting port 14 to avoid the overflow of the grouting slurry during grouting. A mounting plate is fixedly connected to the lower end of the sealing gasket 17, and a torsion spring 18 is installed on the mounting plate, which facilitates closing the grouting port after grouting of the first steel plate rubber coating 9. A baffle 19 is fixedly connected to the torsion spring 18, which facilitates cooperating with the torsion spring 18. The diameter of the baffle 19 is smaller than the inner diameter of the second grouting port 14. The reinforcing rib plates 3 are installed at intervals on the circumferential side of the steel plate hoop 2, and the reinforcing rib plates 3 are triangular.

[0020] Working principle: In this embodiment, the present invention also proposes a usage method of a foundation pile reinforcement device based on a steel plate rubber coating, including the following steps: Step 1: Insert the second steel plate rubber coating 20 into the expansion groove of the steel plate ring 7. Subsequently, install the first grouting pipe 5 and the floating bladder 13, and insert the second grouting pipe 6 into the sliding groove of the floating bladder 13. Then, take out the vertical steel bar 1, and sequentially weld the inner steel bar ring 11 and the outer steel bar ring 10 to the vertical steel bar 1 respectively. Step 2: Take out the steel plate circle 8, sleeve the steel plate ring 7 outside the steel plate circle 8 and weld them. At the same time, weld the bottom ends of multiple vertical steel bars 1 to the steel plate circle 8. Then, place the welded device in the pre-dug foundation pile groove. At this time, the steel plate ring 7 abuts against the ground surface, and the first steel plate rubber coating 9 is located below the ground surface. At this time, install the steel plate hoop 2 through the ear plates 15 to wrap the foundation pile. Finally, inject the rubber-coated layer 4 inside the foundation pile and the steel plate hoop 2. At this time, the bumps 16 of the steel plate hoop 2 and the rubber-coated layer 4 rub against each other, reducing the internal gap and increasing the stability of the foundation pile. Step 3: Align the first grouting port 12 at the bottom of the first grouting pipe 5 with the center of the first steel plate rubber pack 9, and align the second grouting pipe 6 and the second grouting port 14 with the sealing washer 17 of the first steel plate rubber pack 9. Insert the second grouting pipe 6 into the grouting port, push the baffle 19 downward, and at the same time insert the sealing washer 17 into the sealing groove to prevent overflow during grouting. At this time, first inject the grout into the second grouting pipe 6, and then the first steel plate rubber pack 9 expands, squeezing the surrounding soil. At the same time, the second steel plate rubber pack 20 expands in the expansion groove to support the steel plate 21 to prevent the rubber pack from thinning and breaking due to expansion; Step 4: After the first steel plate rubber pack 9 is grouted, pull out the second grouting pipe 6 from the grouting port. At this time, under the action of the torsion spring 18, the baffle 19 closes again to prevent the grout from leaking and deforming the first steel plate rubber pack 9. At this time, inject grout into the center of the first steel plate rubber pack 9 through the first grouting pipe 5. As the grout water level rises, the floating bladder 13 drives the first grouting pipe 5 and the second grouting pipe 6 to rise and fill the foundation pile; Step 5: After the grout in the foundation pile hardens, remove the steel plate hoops 2, the stiffening ribs 3 and the steel plate rings 8, and the steel plate ring 7 remains.

[0021] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A pile foundation reinforcement device based on steel plate glue wrapping, comprising multiple groups of steel plate hoops (2) arranged on the outer side of the pile foundation, characterized in that: A reinforcing rib plate (3) is installed on the outer side of the steel plate hoop (2), a steel plate ring (8) is installed at the bottom end of the lowermost steel plate hoop (2), a first steel plate glue pack (9) is installed at the lower end of the steel plate ring (8), a grouting assembly is installed inside the foundation pile, and a glue pack layer (4) is injected between the foundation pile and the steel plate hoop (2).

2. The base pile reinforcement device based on a steel plate rubber package according to claim 1, characterized in that: A plurality of vertical steel bars (1) are installed equidistantly inside the foundation pile. An outer steel bar ring (10) is fixedly connected to the outer side of the vertical steel bar (1), and an inner steel bar ring (11) is fixedly connected to the inner side of the vertical steel bar (1). The outer steel bar ring (10) and the inner steel bar ring (11) are alternately installed on the vertical steel bar (1).

3. The pile foundation reinforcement device based on a steel plate glue package according to claim 1, characterized in that: The grouting assembly includes a first grouting pipe (5) and a second grouting pipe (6) installed inside the foundation pile. A first grouting port (12) is installed at the bottom end of the first grouting pipe (5). The first grouting port (12) is directly above the opening of the first steel plate glue pack (9), and a floating bladder (13) is installed at the lower end of the first grouting pipe (5).

4. The base pile reinforcement device based on a steel plate glue package according to claim 3, characterized in that: A chute is longitudinally formed through the floating bladder (13). The second grouting pipe (6) is inserted into the chute, and a second grouting port (14) is installed at the bottom end of the second grouting pipe (6). A sealing groove is formed in the second grouting port (14).

5. The pile foundation reinforcement device based on a steel plate glue package according to claim 1, characterized in that: A plurality of convex points (16) are formed on the inner side surface of the steel plate hoop (2), and ear plates (15) are fixedly connected to both sides of the steel plate hoop (2). Multiple groups of steel plate hoops (2) are connected through the ear plates (15).

6. The base pile reinforcement device based on a steel plate rubber package according to claim 1, characterized in that: A steel plate ring (7) is sleeved on the outer side of the steel plate ring (8), and an annular expansion groove with a T-shaped cross-section is formed inside the steel plate ring (8).

7. The pile foundation reinforcement device based on a steel plate rubber package according to claim 1, characterized in that: A second steel plate glue pack (20) is installed at the top end of the first steel plate glue pack (9). The second steel plate glue pack (20) is T-shaped after expansion, and two support steel plates (21) are installed inside the connection between the second steel plate glue pack (20) and the first steel plate glue pack (9). The second steel plate glue pack (20) is located in the annular expansion groove inside the steel plate ring (8).

8. The pile foundation reinforcement device based on a steel plate adhesive package according to claim 7, characterized in that: A sealing gasket (17) matched with the sealing groove is installed on the first steel plate glue pack (9). An installation plate is fixedly connected to the lower end of the sealing gasket (17). A torsion spring (18) is installed on the installation plate. A baffle (19) is fixedly connected to the torsion spring (18). The diameter of the baffle (19) is smaller than the inner diameter of the second grouting port (14).

9. The pile foundation reinforcement device based on a steel plate adhesive package according to claim 1, characterized in that: The reinforcing rib plates (3) are installed at intervals on the circumference of the steel plate hoop (2), and the reinforcing rib plates (3) are triangular in shape.

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