Device for improving uplift resistance of foundation pile

Abstract

The utility model discloses a device for improving anti-pulling performance of a foundation pile, which comprises an upper hoop and a lower hoop, the lower hoop is fixedly sleeved on a pile body, the upper hoop positioned above the lower hoop is slidably sleeved on the pile body, the upper hoop and the lower hoop are connected through double-leaf plates which can be bent outwards, and a plurality of groups of double-leaf plates form a circle along the periphery of the pile body. A plurality of upper vane plates with the free ends rushing towards the top of the pile body are hinged to the outer wall of the upper hoop, gaps allowing soil to enter are reserved between the upper vane plates and the pile body, and when the upper hoop slides towards the lower hoop, the free ends of the upper vane plates are unfolded towards the outer side of the pile body. The device can remarkably improve the anti-pulling performance of the foundation pile, meanwhile, the device can be automatically expanded by means of the soil action during upward pulling, and the use convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the pile foundation technical field of ground photovoltaic power generation, and specifically relates to a device for improving the uplift resistance of a foundation pile. BACKGROUND

[0002] The photovoltaic power generation scale is rapidly developing in China, photovoltaic supports are generally light in weight, and are affected by wind suction load, so that the pile foundation is prone to uplift force, thereby causing uneven deformation of the upper support structure, leading to instability of the support structure, component cracking, and even falling off.

[0003] Therefore, how to improve the uplift resistance of the pile foundation and improve the use convenience of the pile foundation device has become a technical problem that needs to be solved by the technical personnel in the field. CONTENT OF THE UTILITY MODEL

[0004] In view of the above, the technical problem to be solved by the utility model is to provide a device for improving the uplift resistance of a foundation pile, to improve the uplift resistance of the pile foundation, and to improve the use convenience of the device as much as possible.

[0005] The utility model is implemented in the following manner, a device for improving the uplift resistance of a foundation pile, comprising an upper hoop and a lower hoop, the lower hoop is fixedly sleeved on the pile body, the upper hoop above the lower hoop is slidably sleeved on the pile body, the upper hoop and the lower hoop are connected through double-leaf plates that can be bent outward, a plurality of groups of double-leaf plates are arranged in a circle along the outer periphery of the pile body, a plurality of upper leaf plates with free ends that are punched toward the top of the pile body are hinged to the outer wall of the upper hoop, and a gap through which soil can enter is reserved between the upper leaf plates and the pile body, when the upper hoop slides toward the lower hoop, the free ends of the plurality of upper leaf plates are unfolded to the outside of the pile body.

[0006] Preferably, the outer wall of the upper hoop is provided with a first pin shaft, the outer wall of the lower hoop is provided with a second pin shaft, the double-leaf plate comprises a middle leaf plate hinged to the first pin shaft and a lower leaf plate hinged to the second pin shaft, and the middle leaf plate and the lower leaf plate are hinged through a third pin shaft.

[0007] Preferably, the upper leaf plate, the middle leaf plate, and the lower leaf plate are in an initial position parallel to the pile body in an initial state, and after the upper leaf plate and the pile body are separated by soil, the upper hoop slides downward, and the leaf plates are in an unfolded position in an unfolded state after the pin shaft rotates.

[0008] Preferably, the upper leaf plate, the middle leaf plate, and the lower leaf plate are steel plates.

[0009] Preferably, the cross section of the pile body is square, the upper leaf plate, the middle leaf plate, and the lower leaf plate are four pieces respectively, and are uniformly arranged around the pile body in a square shape.

[0010] The utility model has the advantages and technical effects that when the pile foundation is subjected to pulling force, the pin shaft and the leaf plate can be automatically unfolded, without being opened by the user alone, and the use convenience of the pile foundation device is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is the elevation view of the device in the initial position of the utility model;

[0012] Figure 2 is the elevation view of the device in the unfolded position of the utility model;

[0013] Figure 3 is the plan view of the device in the unfolded position of the utility model;

[0014] Figure 4 is the first pin shaft of the utility model device large sample view;

[0015] Figure 5 is the second pin shaft and third pin shaft large sample view of the utility model device;

[0016] Figure 6 is the single blade of the utility model device enlarged sample view. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail in combination with examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0018] In the description of the utility model creation, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model creation and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model creation.

[0019] In addition, the terms "first", "second" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0020] Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model creation, unless otherwise specified, the meaning of "multiple" is two or more.

[0021] In the description of the utility model, it needs to be explained that, unless there is a definite provision and limitation, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according of specific circumstances.

[0022] As Figures 1-6 The utility model discloses a device that improves the uplift resistance of foundation pile, which comprises upper hoops 5 and lower hoops 6. The lower hoops 6 are fixedly sleeved on the pile body 1. The upper hoops 5 above the lower hoops 6 are slidably sleeved on the pile body 1. The upper hoops 5 and the lower hoops 6 are connected by double-leaf plates that can be bent outward. A plurality of double-leaf plates are arranged in a circle along the outer periphery of the pile body 1. A plurality of upper leaf plates 2 with free ends that are punched toward the top of the pile body are hingedly connected to the outer wall of the upper hoops 5. The upper leaf plates 2 and the pile body 1 are provided with gaps that allow soil to enter. When the upper hoops 5 slide toward the lower hoops 6, the free ends of the plurality of upper leaf plates 2 expand outward.

[0023] Further, the outer wall of the upper hoops 5 is provided with a first pin shaft 7, and the outer wall of the lower hoops 6 is provided with a second pin shaft 8. The double-leaf plates comprise a middle leaf plate 3 hingedly connected to the first pin shaft 7 and a lower leaf plate 4 hingedly connected to the second pin shaft 8. The middle leaf plate 3 and the lower leaf plate 4 are hingedly connected by a third pin shaft 10.

[0024] The upper leaf plates 2, the middle leaf plates 3, and the lower leaf plates 4 are in an initial position parallel to the pile body 1 in the initial state. After the soil enters the gap between the upper leaf plates 2 and the pile body 1 under the uplift force of the foundation pile, the upper hoops 5 slide downward, and the leaf plates expand to an expanded position in the expanded state after the pin shafts rotate.

[0025] Preferably, the upper leaf plates 2, the middle leaf plates 3, and the lower leaf plates 4 are steel plates.

[0026] Preferably, the cross section of the pile body 1 is square, and the upper leaf plates 2, the middle leaf plates 3, and the lower leaf plates 4 are four pieces of square steel plates that are evenly arranged around the pile body 1.

[0027] Specifically, the device that improves the uplift resistance of foundation pile is connected to the pile body by fixed hoops and movable hoops. The pin shaft members are connected to the hoops, and the leaf plates are connected to the pin shafts. The pin shafts and the leaf plates are arranged in a ring around the pile body. The upper leaf plates and the pile body are provided with gaps that allow soil to enter. When driving the pile downward, the leaf plates are in an initial position parallel to the pile body in the initial state. After the soil enters the gap between the upper leaf plates and the pile body under the uplift force of the foundation pile, the pin shafts rotate, and the leaf plates expand to an expanded position in the expanded state.

[0028] The device, when the pile foundation device is placed in the soil, the leaf plate presents the initial position, so that the pile body is easily lowered to the preset position.

[0029] The specific construction method comprises the following steps:

[0030] (1) the steel plate is pre-buried on the pile body 1 and welded with the lower hoop 6, so as to ensure that the lower hoop is reliably connected and cannot be moved;

[0031] (2) the second pin shaft 8 is installed on the lower hoop 6, and the structure of the second pin shaft 8 is shown in Figure 5 ;

[0032] (3) the movable upper hoop 4 is installed and connected with the first pin shaft 7, and the structure of the first pin shaft 7 is shown in Figure 4 ;

[0033] (4) the upper leaf plate 2 is connected with the first pin shaft 7 and connected through the bolt 9;

[0034] (5) the middle leaf plate 3 and the lower leaf plate 4 are connected through the third pin shaft 10, and the structure of the third pin shaft 10 is the same as that of the second pin shaft 8.

[0035] The utility model discloses in the wind suction load influence, the pile foundation is easy to appear the situation of the pullout force, improves the pullout performance of base pile.

[0036] The above-mentioned engineering measures are suitable for the current engineering, and are only used for explaining the technical thought and characteristics of the utility model, but are not limited to the current cross section, pin shaft specification, hoop model and the like. The purpose is to enable the person skilled in the art to understand the content of the utility model and to implement it, and the patent range of the utility model can not be limited by the present embodiment, that is, any equivalent change or modification made according to the spirit disclosed by the utility model still falls within the protection scope of the utility model.

Claims

1. A device for improving the pull-out resistance of foundation piles, characterized in that, It includes an upper clamp (5) and a lower clamp (6). The lower clamp (6) is fixedly fitted onto the pile body (1). The upper clamp (5), located above the lower clamp (6), is slidably fitted onto the pile body (1). The upper clamp (5) and the lower clamp (6) are connected by a double-leaf plate that can be bent outward. Multiple sets of double-leaf plates form a circle around the outside of the pile body (1). Multiple upper leaf plates (2) with free ends pointing towards the top of the pile body are hinged on the outer wall of the upper clamp (5). A gap is reserved between the upper leaf plates (2) and the pile body (1) to allow soil to enter. When the upper clamp (5) slides towards the lower clamp (6), the free ends of the multiple upper leaf plates (2) unfold outward toward the outside of the pile body.

2. The device for improving the pull-out resistance of foundation piles according to claim 1, characterized in that, The upper clamp (5) is provided with a first pin (7) on its outer wall, and the lower clamp (6) is provided with a second pin (8) on its outer wall. The double leaf plate includes a middle leaf plate (3) hinged to the first pin (7) and a lower leaf plate (4) hinged to the second pin (8). The middle leaf plate (3) and the lower leaf plate (4) are hinged together by a third pin (10).

3. The device for improving the pull-out resistance of foundation piles according to claim 1, characterized in that, When driving the pile downwards, the upper leaf plate (2), middle leaf plate (3), and lower leaf plate (4) are initially in the initial position parallel to the pile body (1). After the pile is subjected to upward pulling force, the upper clamp (5) slides down after the soil enters the gap between the upper leaf plate (2) and the pile body (1). After the pin rotates, the leaf plate is in the extended position of the extended state.

4. The device for improving the pull-out resistance of foundation piles according to claim 1, characterized in that, The upper leaf plate (2), middle leaf plate (3), and lower leaf plate (4) are steel plates.

5. The device for improving the pull-out resistance of foundation piles according to any one of claims 1-4, characterized in that, The cross-section of the pile body (1) is square, and the upper leaf plate (2), middle leaf plate (3) and lower leaf plate (4) are four pieces, which are evenly arranged in a square around the pile body (1).

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