A reusable micropile

Abstract

This utility model discloses a reusable micropile, belonging to the field of micro steel pipe pile technology. It includes an outer pile body, an auxiliary connecting guide assembly, an inner pile body, and a base plate. The base plate is a circular steel plate, with its upper end fixedly connected to both the outer and inner pile bodies. Both the outer and inner pile bodies are hollow pipe piles, with the inner diameter of the outer pile body being larger than the outer diameter of the inner pile body. The guide assembly is connected to the lower end of the base plate. The auxiliary connecting guide assembly includes guide protrusions fixedly connected to the lower end of the base plate. A guide groove is formed at the upper end of the outer pile body to engage with the base plate. Two sets of micropiles can be connected end-to-end through the guide protrusions and guide grooves, which cooperate to provide guidance. Through this method, the inner and outer pile bodies and the connecting plate make the overall strength of the micropile more reliable, while also facilitating end-to-end and lateral connections between different micropiles, enhancing the applicability and flexibility of the micropile.

Description

Technical Field

[0001] This utility model relates to the field of micro steel pipe pile technology, specifically to a reusable micro pile. Background Technology

[0002] Micropiles have a wide range of applications in situations where construction space is limited, playing an important role in fields such as foundation reinforcement and slope protection.

[0003] Existing technologies have made many improvements to micropiles. For example, Chinese patent CN212865908U discloses a grouting micropile, which includes a steel pipe with an open top. The steel pipe includes, from top to bottom, a coaxially arranged perforated pipe section, a spiral section, and a pile tip. The pipe wall of the perforated pipe section is cylindrical, and multiple first grouting holes are opened on the pipe wall of the perforated pipe section at intervals. Multiple second grouting holes are arranged at intervals along the spiral direction on the pipe wall of the spiral section.

[0004] While the aforementioned grouting micropiles can indeed improve the support capacity of piles to some extent, they still have the following shortcomings in practical applications: 1. The lack of a guide component connecting the ends of the grouting micropiles makes the operation extremely inconvenient when welding multiple sets of grouting micropiles to adapt to foundation pits of different depths. 2. Grouting micropiles lack lateral connection components. In situations such as slope support where rows of micropiles are needed for reinforcement, the operation is inconvenient and the overall strength will decrease.

[0005] Based on this, the present invention designs a reusable micropile to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a reusable micropile.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A reusable micropile includes an outer pile body, an auxiliary connecting guide component, an inner pile body, and a base plate. The base plate is a circular steel plate, and its upper end is fixedly connected to the outer pile body and the inner pile body respectively. Both the outer pile body and the inner pile body are hollow pipe piles, and the inner diameter of the outer pile body is larger than the outer diameter of the inner pile body. The guide component is connected to the lower end of the base plate. The auxiliary connection guide component includes a guide protrusion, which is fixedly connected to the lower end of the base plate. The upper end of the outer pile body is provided with a guide groove that can be inserted into the base plate. The two sets of micro piles can be connected end to end through the guide protrusion and the guide groove, and the guide protrusion and the guide groove work together to play a guiding role.

[0008] Furthermore, the lower end of the guide protrusion is set as a guide slope that matches the guide groove, and the connection between the bottom surface and the side surface of the guide protrusion is arc-shaped.

[0009] Furthermore, an end block is fixedly connected to the lower end of the base plate, and the end block is a solid conical structure.

[0010] Furthermore, multiple sets of equidistant internal pile through holes are opened on the pipe wall of the internal pile body, and each set of internal pile through holes is distributed in a circumferential array along the pipe wall of the internal pile body.

[0011] Furthermore, there are multiple sets of connecting and fixing plates that are fixedly connected between the outer pile body and the inner pile body, and these multiple sets of connecting and fixing plates are distributed at equal intervals along the vertical direction of the inner pile body.

[0012] Furthermore, the connecting plate has multiple sets of circumferentially arrayed connecting plate through holes, which are fan-shaped structures.

[0013] Furthermore, the connecting plate through holes between adjacent connecting fixing plates are staggered.

[0014] Furthermore, adjacent micropiles are connected by lateral connecting components.

[0015] Compared with the prior art, the advantages of this utility model are: 1. The design of the inner and outer pile bodies and the connecting plate makes the support effect and strength of the micro piles extremely reliable before and after grouting; 2. The micropiles are equipped with guide components at both ends, which makes the welding operation of connecting the micropiles end to end simple, so that the micropiles can be better adapted to foundation pits of different depths when reused. 3. The micropiles are equipped with transverse connecting components on the left and right side walls, which makes the operation convenient when rows of micropiles are needed for slope support, and also increases the overall strength. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional view of a reusable micropile according to the present invention. Figure 2 This is a front view of a reusable micropile according to the present invention; Figure 3 This is a schematic diagram of the structure of a reusable micropile according to the present invention; Figure 4 This is a perspective view of Embodiment 2 of the present invention.

[0018] The labels in the diagram represent: 1. Outer pile body; 2. Inner pile body; 3. Base plate; 4. End block; 5. Guide protrusion; 6. Guide groove; 7. Upper end through hole; 8. Inner pile through hole; 9. Connecting fixing plate; 10. Connecting plate through hole; 11. Connecting concave block; 12. Connecting groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0021] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-4 A reusable micropile includes an outer pile body 1, an auxiliary connecting guide component, an inner pile body 2, and a base plate 3. The base plate 3 is a circular steel plate, and the upper end of the base plate 3 is fixedly connected to the outer pile body 1 and the inner pile body 2 respectively. Both the outer pile body 1 and the inner pile body 2 are hollow pipe piles. The inner diameter of the outer pile body 1 is larger than the outer diameter of the inner pile body 2. The guide component is connected to the lower end of the base plate 3.

[0022] The auxiliary connection guide component includes a guide protrusion 5, which is fixedly connected to the lower end of the base plate 3. The upper end of the outer pile body 1 is provided with a guide groove 6 that is inserted into the base plate 3. The two sets of micro piles can be connected end to end through the guide protrusion 5 and the guide groove 6, and the guide protrusion 5 and the guide groove 6 work together to play a guiding role.

[0023] The lower end of the guide protrusion 5 is set as a guide slope that cooperates with the guide groove 6, and the connection between the bottom surface and the side surface of the guide protrusion 5 is arc-shaped. This structure allows the guide protrusion 5 and the guide groove 6 to play a good guiding role when the two sets of micropiles are connected end to end.

[0024] The bottom of the base plate 3 is fixedly connected to an end block 4. The end block 4 is a solid conical structure. The end block 4 is used to reduce the resistance at the end when the pile is driven, so as to facilitate penetration into the soil.

[0025] If used in very soft soil, end block 4 can have a flat bottom, but the edges should be chamfered.

[0026] The upper end of the outer pile body 1 is provided with an upper through hole 7. The upper through hole 7 is used to facilitate the pouring of mortar and to avoid the end block 4 when the two sets of micro piles are connected end to end.

[0027] Multiple sets of equidistant internal pile through holes 8 are opened on the pipe wall of the inner pile body 2, and each set of internal pile through holes 8 is arranged in a circular array along the pipe wall of the inner pile body 2.

[0028] There are multiple sets of connecting and fixing plates 9 fixedly connected between the outer pile body 1 and the inner pile body 2. The multiple sets of connecting and fixing plates 9 are distributed at equal intervals along the vertical direction of the inner pile body 2.

[0029] The connecting fixing plate 9 has multiple sets of circumferential array of connecting plate through holes 10, and the connecting plate through holes 10 have a fan-shaped structure.

[0030] The connecting plate through holes 10 between adjacent connecting fixing plates 9 are staggered.

[0031] In this utility model, the end block 4 at the lower end of the base plate 3 is inserted into the ground soil layer by a downhole eccentric hammer or other equipment until the upper end of the outer pile body 1 is at the same height as the ground. Mortar is injected into the upper through hole 7. The mortar flows downward along the pipe wall of the outer pile body 1 and the inner pile body 2. With the cooperation of the inner pile through hole 8 and the connecting plate through hole 10 on the connecting fixing plate 9, the mortar can fill the entire internal space. When the mortar reaches the upper end of the inner pile body 2, a vibrator is used to compact the mortar. When backfilling the foundation pit for micropiles, a cupping device can be used to pull out the micropiles. At this time, the mortar inside the micropiles has hardened and can be reused. When used in foundation pits of different depths, multiple sets of micropiles can be connected end to end. Under the guidance of the guide protrusion 5 and the guide groove 6, adjacent micropiles can be easily aligned. At this time, the weld seam can be welded, or a steel pipe can be sleeved on the outer wall and then welded to fix multiple sets of micropiles.

[0032] Example 2: In some embodiments, such as Figure 4 As shown, in a preferred embodiment of this utility model, adjacent micropiles are connected by a transverse connecting component.

[0033] The transverse connection assembly includes a connecting recess 11. The connecting recess 11 is fixedly connected to the outer wall of the left end of the outer pile body 1, and the connecting groove 12, which is inserted into the connecting recess 11, is fixedly connected to the outer wall of the right end of the outer pile body 1.

[0034] In this invention, when a landslide requires micropiles to be arranged in rows to enhance anti-sliding performance, the connecting recess 11 on the outer pile body 1 can be inserted into the connecting groove 12 on the adjacent outer pile body 1, and connected side by side in the lateral direction, thereby improving the overall performance of the micropiles.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A reusable micropile, comprising an outer pile body (1), characterized in that: It also includes an auxiliary connection guide component, an inner pile body (2) and a base plate (3). The base plate (3) is a circular steel plate. The upper end of the base plate (3) is fixedly connected to the outer pile body (1) and the inner pile body (2) respectively. The outer pile body (1) and the inner pile body (2) are both hollow pipe piles. The inner diameter of the outer pile body (1) is larger than the outer diameter of the inner pile body (2). The guide component is connected to the lower end of the base plate (3). The auxiliary connection guide component includes a guide protrusion (5), which is fixedly connected to the lower end of the base plate (3). The upper end of the outer pile body (1) is provided with a guide groove (6) that is inserted into the base plate (3). The two sets of micro piles can be connected end to end through the guide protrusion (5) and the guide groove (6), and the guide protrusion (5) and the guide groove (6) work together to play a guiding role.

2. The reusable micropillar according to claim 1, characterized in that, The lower end of the guide protrusion (5) is set as a guide slope that cooperates with the guide groove (6), and the connection between the bottom surface and the side surface of the guide protrusion (5) is arc-shaped.

3. The reusable micropillar according to claim 1, characterized in that, The bottom of the base plate (3) is fixedly connected to an end block (4), which is a solid conical structure.

4. The reusable micropillar according to claim 1, characterized in that, Multiple sets of equidistant internal pile through holes (8) are opened on the pipe wall of the inner pile body (2), and each set of internal pile through holes (8) is arranged in a circular array along the pipe wall of the inner pile body (2).

5. The reusable micropillar according to claim 1, characterized in that, There are multiple sets of connecting plates (9) for fixed connection between the outer pile body (1) and the inner pile body (2), and the multiple sets of connecting plates (9) are distributed at equal intervals in the vertical direction along the inner pile body (2).

6. The reusable micropillar according to claim 5, characterized in that, The connecting fixing plate (9) has multiple sets of circumferential array of connecting plate through holes (10), and the connecting plate through holes (10) are fan-shaped structures.

7. The reusable micropillar according to claim 6, characterized in that, The connecting plate through holes (10) between adjacent connecting fixing plates (9) are staggered.

8. The reusable micropillar according to claim 1, characterized in that, Adjacent micropiles are connected by lateral connecting components.

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