Foundation gravel pile structure

Abstract

The utility model relates to the technical field of gravel piles, in particular to a foundation gravel pile structure which comprises a gravel pile body, a conical anti-pulling head penetrates into the gravel pile body, arc-shaped expansion blades are hinged to the upper side of the anti-pulling head, an opening part is arranged on one side of each expansion blade, an overlapping part is arranged on the side, away from the opening part, of each expansion blade, and multiple sets of expansion blades are arranged in an annular array mode. And the opening part of one group of expansion blades is overlapped with the overlapping part of the other adjacent group of expansion blades. The anti-pulling head is rotated through external force, gravel soil in a foundation can gradually enter the space between the expansion blades and the upper cone through the opening part, the multiple sets of expansion blades can be gradually expanded outwards, the contact area of the whole anti-pulling head and gravel is increased, and the anti-pulling capacity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gravel piles, in particular to a foundation gravel pile structure. Background Art

[0002] A gravel pile is a composite foundation reinforcement pile mainly made of gravel (pebble). It belongs to a kind of granular pile. According to its pile-making process, it can be divided into two categories: vibroflotation (wet method) gravel piles and dry gravel piles. The gravel pile made by the pile-making process of vibration plus water jet is called vibroflotation gravel pile or wet gravel pile, while the gravel piles made by various water-jet-free processes (such as dry vibration, vibration extrusion, hammering, etc.) are collectively called dry gravel piles. Gravel piles are suitable for compacting loose sandy soil, silt, plain fill and miscellaneous fill foundations. Among various pile bodies of composite foundations, gravel piles and sand piles belong to granular material piles, and their reinforcement mechanisms are similar. There are differences in mechanisms according to different soils to be reinforced: for sandy soil, silt and gravel soil, it has replacement and compaction effects; for cohesive soil and fill, it is mainly based on replacement, and has different degrees of compaction and promotion of drainage consolidation effects. Gravel piles are mainly applied in engineering for soft foundation reinforcement, dam slope reinforcement, elimination of liquefaction of liquefiable sandy soil, elimination of collapsibility of collapsible loess, etc. However, due to its own structural problems, the anti-pulling ability of this kind of gravel pile is limited. Although the improved grouting gravel pile combines the advantages of gravel piles and pressure grouting, its anti-pulling ability is still weak. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is, aiming at the above existing technical deficiencies, to provide a foundation gravel pile structure, which solves the problem of weak anti-pulling ability of existing gravel piles.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a foundation gravel pile structure, including a gravel pile body, a conical anti-pulling head is penetrated into the gravel pile body, an arc-shaped expansion leaf is hinged on the upper side of the anti-pulling head, an opening part is arranged on one side of the expansion leaf, a coincidence part is arranged on the side of the expansion leaf far away from the opening part, multiple groups of expansion leaves are arranged in a circular array, and the opening part of one group of expansion leaves coincides with the coincidence part of the adjacent other group of expansion leaves.

[0005] To further optimize the technical solution, an inwardly converging upper cone is arranged on the upper side of the anti-pulling head, a step is arranged at the position where the upper cone is connected to the anti-pulling head, the expansion leaf is arranged on the inner side of the upper part of the step, multiple hinge seats are arranged in the upper cone in an array, and a hinge arm is arranged on the inner side of the expansion leaf connected to the upper cone, and the hinge arm is hinged in the hinge seat.

[0006] To further optimize the technical solution, a connecting part is arranged on the upper part of the upper cone, an anti-pulling rod is connected to the connecting part, one end of the anti-pulling rod is sleeved on the outer side of the top of the connecting part, and a pin is radially penetrated through the position where the anti-pulling rod is connected to the connecting part.

[0007] To further optimize this technical solution, the anti-pulling rod is a hollow tubular structure, and there are multiple radially arranged perfusion holes in the anti-pulling rod.

[0008] Compared with the prior art, the utility model has the following advantages: 1. By externally rotating the anti-pulling head, the gravel and soil in the foundation will gradually enter between the expansion blades and the upper cone through the opening part, and the multiple groups of expansion blades can be gradually pushed outwards, increasing the overall contact area between the anti-pulling head and the gravel and improving the anti-pulling ability; 2. By grouting into the anti-pulling rod, the slurry enters around the anti-pulling rod through the perfusion holes to form a concrete pile body, further improving the overall structural strength of the pile body. Description of the Drawings

[0009] Figure 1 It is a schematic structural diagram of an anti-pulling head of a foundation gravel pile structure;

[0010] Figure 2 It is a top view of an anti-pulling head of a foundation gravel pile structure;

[0011] Figure 3 It is a schematic structural diagram of the expanded structure of the expansion blades in a foundation gravel pile structure;

[0012] Figure 4 It is a top view of the expanded structure of the expansion blades in a foundation gravel pile structure;

[0013] Figure 5 It is a schematic structural diagram during the use of a foundation gravel pile structure.

[0014] In the figure: 1. Anti-pulling head; 11. Upper cone; 12. Hinge seat; 110. Step; 2. Expansion blade; 20. Hinge arm; 21. Opening part; 22. Overlapping part; 3. Connecting part; 4. Anti-pulling rod; 41. Perfusion hole; 5. Pin. Detailed Embodiment

[0015] To make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings in the specific embodiments. It should be understood that these descriptions are exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concept of the utility model.

[0016] It should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. involved in this application document is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present disclosure. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0017] Combined with Figures 1 to 4 As shown, a foundation gravel pile structure includes a gravel pile body. A conical uplift head 1 is inserted into the gravel pile body. An inwardly tapered upper cone 11 is provided on the upper side of the uplift head 1. A step 110 is provided at the position where the upper cone 11 is connected to the uplift head 1. Expansion leaves 2 are hinged to the outside of the upper cone 11 on the upper side of the uplift head 1. The expansion leaves 2 are arranged on the inner side of the upper part of the step 110. A plurality of hinge seats 12 are arranged in an array in the upper cone 11. Hinge arms 20 are provided on the inner side where the expansion leaves 2 are connected to the upper cone 11. The hinge arms 20 are hinged in the hinge seats 12.

[0018] An opening 21 is provided on one side of the expansion leaf 2. A overlapping part 22 is provided on the side of the expansion leaf 2 away from the opening 21. Multiple groups of expansion leaves 2 are arranged in a circular array. The opening 21 of one group of expansion leaves 2 coincides with the overlapping part 22 of the adjacent other group of expansion leaves 2.

[0019] A connecting part 3 is provided on the upper part of the upper cone 11. A pull - out rod 4 is connected to the connecting part 3. One end of the pull - out rod 4 is sleeved outside the top of the connecting part 3. A pin 5 is radially penetrated at the position where the pull - out rod 4 is connected to the connecting part 3. The pull - out rod 4 is a hollow tubular structure. A plurality of radially arranged perfusion holes 41 are provided in the pull - out rod 4.

[0020] During use, combined with Figures 1 to 5 As shown, first, the uplift head 1 is connected to the pull - out rod 4 through the connecting part 3 and sent into the soft foundation. After the uplift head 1 reaches the predetermined depth, by rotating the pull - out rod 4, the pull - out rod 4 drives the uplift head 1 to rotate through the pin 5. During the rotation process, the gravel and soil in the foundation will gradually enter between the expansion leaves 2 and the upper cone 11 through the opening 21, and can gradually push the multiple groups of expansion leaves 2 outwards, increasing the overall contact area between the uplift head 1 and the gravel. Then, gravel is continuously filled around the pull - out rod 4 and compacted. By injecting slurry into the pull - out rod 4, the slurry enters the periphery of the pull - out rod 4 through the perfusion holes 41 to form a pile body, improving the overall structural strength. Then, compaction is carried out again, and finally the pile making is completed.

[0021] It should be understood that the above specific embodiments of the present utility model are only used for illustrative explanation or interpretation of the principle of the present utility model, and do not constitute a limitation to the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present utility model shall be included within the protection scope of the present utility model. In addition, the appended claims of the present utility model are intended to cover all variations and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A ground gravel pile structure, comprising a gravel pile body, characterized in that: A conical uplift head (1) is inserted into the gravel pile body. An arc-shaped expansion leaf (2) is hinged to the upper side of the uplift head (1). An opening (21) is provided on one side of the expansion leaf (2). A coincidence part (22) is provided on the side of the expansion leaf (2) away from the opening (21). A plurality of groups of the expansion leaves (2) are arranged in a circular array. The opening (21) of one group of the expansion leaves (2) coincides with the coincidence part (22) of the adjacent other group of the expansion leaves (2).

2. The structure of a foundation gravel pile according to claim 1, wherein: An inwardly converging upper cone (11) is provided on the upper side of the uplift head (1). A step (110) is provided at the position where the upper cone (11) is connected to the uplift head (1). The expansion leaf (2) is arranged on the inner side of the upper part of the step (110). A plurality of hinge seats (12) are arranged in an array in the upper cone (11). An articulated arm (20) is provided on the inner side where the expansion leaf (2) is connected to the upper cone (11). The articulated arm (20) is hinged in the hinge seat (12).

3. A foundation gravel pile structure according to claim 2, characterized in that: A connecting part (3) is provided on the upper part of the upper cone (11). An uplift rod (4) is connected to the connecting part (3). One end of the uplift rod (4) is sleeved on the outer side of the top of the connecting part (3). A pin (5) is radially inserted through the position where the uplift rod (4) is connected to the connecting part (3).

4. A foundation gravel pile structure according to claim 3, characterized in that: The uplift rod (4) is a hollow tubular structure. A plurality of radially arranged perfusion holes (41) are provided in the uplift rod (4).

Images