Steel pipe pile head hammer foundation detection protection device

Abstract

The utility model discloses a steel pipe pile head hammer foundation detection and protection device, which relates to the technical field of steel pipe pile head hammer foundation detection and protection, and adopts the technical scheme that the steel pipe pile head hammer foundation detection and protection device comprises a pile pad and an inner support structure, the pile pad is placed on the top surface of a foundation pile, namely between the top surface of the foundation pile and a pile hammer, and the inner support structure is attached to the inner diameter of the steel pipe pile; the inner supporting structure is arranged in the steel pipe pile head. The protection device for hammering detection of the variable-diameter pile has the advantages that the protection device aims at solving the problems that a steel pipe pile is impacted by a heavy hammer in the pile foundation detection process, a pile head is damaged, and the construction quality of a pile foundation is affected, the detection efficiency is improved, and the detection cost is reduced. Potential risks such as reworking caused by damage of the pile head and influence of a traditional plank pile pad on monitoring data are avoided, a certain reference value is provided for future pile foundation construction and detection, and development and application of the steel pipe pile are promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of detection and protection of steel pipe pile pile heads, and particularly relates to a detection and protection device for steel pipe pile pile heads. Background Art

[0002] The pile foundation is a foundation form with high bearing capacity, wide application range and long history. With the improvement of production level and the development of science and technology, the types, processes, design theories, calculation methods and application ranges of pile foundations have all developed greatly and are widely used in high-rise buildings, ports, bridges and other projects. The steel pipe piles in the pile foundation are widely used due to their large horizontal resistance, strong transverse force resistance and great design flexibility. The wall thickness of the steel pipe pile is generally between 3.5 mm and 80 mm. The wall thicknesses of the thin-walled steel pipe piles currently used in offshore photovoltaic projects are 10 mm and 11 mm. The inside of the steel pipe pile is a hollow structure. When performing hammering detection, the pile head is subjected to a large impact force, and the rigid hammer collides with the rigid pile head, which easily deforms the pile head and affects subsequent construction. In order to protect the pile head from damage, a pile cushion is placed on the pile head.

[0003] At present, the commonly used pile cushions are generally 10 mm to 30 mm thick wooden boards or plywood, which are not easy to fix and have a risk of falling off, resulting in poor protection effect on the pile head and easy damage to the pile head. After the pile cushion falls off, it needs to be manually re-placed, with high safety risks. The wooden board or plywood can hardly be recycled; at the same time, for short piles and piles with small bearing capacity, using wooden boards usually affects the matching of the pile hammer, and the measured curve has more low-frequency components and a narrower excited frequency domain, resulting in "distorted" results.

[0004] In addition, if the pile head is damaged during detection due to the falling off of the pile cushion, the pile foundation needs to be reworked, which affects the construction period and increases the cost. The existing pile cushion fixing devices are only applicable to pile foundations with a fixed pile diameter. The pile heads of the steel pipe piles used in offshore photovoltaics are variable-diameter piles and are not applicable to the existing pile head protection devices.

[0005] In summary, there is currently no pile head protection device applicable to variable-diameter steel pipe piles, which increases the difficulty and uncertainty of detection and directly affects the quality of the pile foundation.

[0006] How to solve the above problems is the research topic of this solution. Content of the Utility Model

[0007] In order to achieve the above utility model purpose and address the above technical problems, the utility model provides a detection and protection device for steel pipe pile pile heads.

[0008] The technical solution is that it includes a pile cushion and an internal support structure. The pile cushion is placed on the top surface of the foundation pile, that is, between the top surface of the foundation pile and the pile hammer. The internal support structure is arranged to fit the inner diameter of the steel pipe pile and is disposed inside the pile head of the steel pipe pile.

[0009] The inner support structure includes a lining layer, a support groove, an adjustable screw rod, an engaging groove, a hook, and a screw head;

[0010] The pile cushion includes an elastic layer, a rigid layer, a threaded opening, and a force - transmitting steel column.

[0011] The rigid layer includes two upper and lower steel plate layers, and the elastic layer includes a rubber structure layer disposed between the two steel plate layers and a rubber sleeve sleeved outside the steel plate layers;

[0012] The steel plate layers and the rubber structure layer are arranged in an alternating laminated pattern, and several force - transmitting steel columns are welded between the two steel plate layers.

[0013] The pile cushion is used to be placed on the top surface of the foundation pile, that is, located between the top surface of the foundation pile and the pile hammer. The elastic layer is the main structural layer of the pile cushion, which has good elasticity and protects the steel pipe pile. The steel plate layer is arranged inside the pile cushion and between the rubber structure layers, and is used to transmit force to the foundation pile without affecting the wave velocity of the pile body. The composite - structure pile cushion composed of an elastic layer and a rigid layer has good protection, high stability, can be recycled, ensures that the pile cushion is not damaged when being hammered, and can also ensure the accuracy of the hammer - impact test results.

[0014] The force - transmitting steel columns connect the upper and lower steel plates into a whole for better force transmission.

[0015] The inner support structure adopts a split - type design. This structure is at least divided into two pieces, and each piece is designed as an arc - shaped steel plate that fits the inner diameter of the steel pipe pile;

[0016] The threaded opening is arranged at the bottom surface of the pile cushion. When setting the steel plate layer, the threaded opening is welded to the steel plate and is wrapped by the external rubber sleeve. The inner ring of the threaded opening is provided with internal threads. Since the pile head of the steel pipe pile has a variable - diameter design and the pile - mouth diameter is the smallest, in order to put the inner support structure in, a split design is adopted. This structure is at least divided into two pieces, and each piece is designed as an arc - shaped steel plate that fits the inner diameter of the steel pipe pile. The size of the inner support structure is set for steel pipe piles with different pile diameters and is arranged inside the pile head of the steel pipe pile. Due to the variable - diameter design of the steel pipe pile, it is easy to be indented and deformed inward when being hammered. The inner support structure is set to help the pile head bear force, resist deformation, and is also used to connect the pile cushion to prevent the pile cushion from shifting.

[0017] The lining layer is set as a rubber layer and is pasted on the outer surface of the inner support structure to protect the inner wall of the steel pipe pile and prevent the steel pipe pile from being damaged when being squeezed by the inner support structure during hammering.

[0018] The support grooves are symmetrically opened in the arc - shaped steel plates of the inner support structure. The inner wall of the support groove is provided with threads, and the support groove is thread - matched with the adjustable screw rod;

[0019] Multiple groups of the support grooves are arranged vertically.

[0020] The adjustable screw rod is made of iron or steel. Threads are provided at both ends of the adjustable screw rod, which can be telescopically adjusted and is used to screw into the support grooves of the arc-shaped steel plates of the two inner support structures to make the whole structure stable, support the steel pipe pile from the inside, and prevent deformation.

[0021] The bite groove is arranged at the interface of the two arc-shaped steel plates of the inner support structure and is used for the two arc-shaped steel plates to bite and fix, preventing the two arc-shaped steel plates from shifting.

[0022] The hook is arranged on the upper part of the two arc-shaped steel plates of the inner support structure and is used for temporary suspension during the assembly of the inner support structure. The hook is suspended at the opening of the steel pipe pile.

[0023] The thread head is arranged at the upper opening of the inner support arc-shaped steel plate. The thread head is provided with an external thread and is used for connecting and fixing with the threaded opening of the pile cushion.

[0024] For the protection device of the pile top against hammering detection, the pile cushion is designed with a threaded opening that can be connected to the inner support structure, making the pile cushion more stable during use. A force-transmitting steel column is arranged between the two arc-shaped steel plates inside the pile cushion, which can transmit force better.

[0025] An inner support structure is provided. The inner support structure is set according to the size of the pile foundation. The inner support structure is assembled by two arc-shaped steel plates. A bite groove is arranged at the interface of the arc-shaped steel plates, enabling the two arc-shaped steel plates to be better combined into a whole.

[0026] A lining layer is arranged on the surface of the inner support structure. The lining layer is a rubber structure and is evenly arranged along the inner circumference of the pile foundation.

[0027] Six support grooves are arranged on the two arc-shaped steel plates. Four are arranged on the center lines of the arc-shaped plates, and two are arranged at the interfaces of the arc-shaped plates, which are symmetric in pairs and are used for the adjustable screw rod to support and bear force. The support grooves are in the form of threaded openings, and the adjustable screw rod is screwed in to prevent the screw rod from falling off due to hammering vibration.

[0028] The hammer foundation detection protection device is provided with three adjustable screw rods. The adjustable screw rods are placed inside the inner support structure and are screwed into the support grooves to tighten the inner support structure, enabling the inner support structure to resist the deformation of the pile foundation during hammering.

[0029] One hook is arranged on the upper part of each of the two arc-shaped steel plates of the inner support structure and is used for temporarily fixing the arc-shaped steel plates.

[0030] The upper opening of the inner support structure is set as a thread head for connecting with the pile cushion.

[0031] All the structures designed for the hammer foundation detection protection device are based on the number of arc-shaped steel plates being 2.

[0032] The beneficial effects brought by the technical solution provided by the embodiment of the present utility model are as follows: This solution provides a protection device for the impact detection of variable-diameter piles, aiming to solve the problems that the steel pipe pile is damaged by the heavy hammer impact during pile foundation detection, affecting the pile head and the quality of pile foundation construction. The application of this device improves the detection efficiency, avoids potential risks such as rework due to pile head damage and the influence of traditional wooden pile cushions on monitoring data, provides certain reference value for future pile foundation construction and detection, and helps to promote the development and application of steel pipe piles;

[0033] By setting the pile cushion, it is ensured that the pile head is not damaged during the impact detection. Compared with the traditional setting of wooden boards or plywood, the new rubber cushion can be reused. An internal support structure is set to prevent the variable-diameter pile head from being sunken inward when being hammered. The internal support structure uses segmented arc-shaped steel plates and the design of adjustable screw rods, which can ensure that the internal support structure can be smoothly placed into the pile mouth, with simple assembly and good support effect. The internal support structure is threadedly connected to the pile cushion, ensuring the stability of the pile cushion and the internal support structure, avoiding the pile cushion and the internal support structure from falling off and shifting under impact during hammering, with simple connection, convenient operation and good use effect;

[0034] All the fittings of this device can be reused. For one type of pile, a set of hammer foundation detection protection devices can complete all the detection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the internal support structure of the embodiment of the present utility model.

[0036] Figure 2 It is a schematic structural diagram of the pile cushion of the embodiment of the present utility model.

[0037] Figure 3 It is a schematic structural diagram of the steel plate layer and the threaded port of the embodiment of the present utility model.

[0038] Figure 4 It is a schematic structural diagram of the combination of the steel plate layer and the rubber structure layer of the embodiment of the present utility model.

[0039] Among them, the reference numerals are: 1, pile cushion; 2, internal support structure; 3, inner lining layer; 4, support groove; 5, adjustable screw rod; 6, bite groove; 7, hook; 8, screw head; 9, rubber structure layer; 10, steel plate layer; 11, threaded port; 12, force-transmitting steel column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further describes the present utility model in detail with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the present utility model and are not used to limit the present utility model.

[0041] It should be noted that, without conflict, the embodiments in the creation of the utility model and the features in the embodiments can be combined with each other.

[0042] In the description of the creation of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the creation of the utility model 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. Therefore, it should not be construed as a limitation to the creation of the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the creation of the utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0043] In the description of the creation of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the creation of the utility model can be understood through specific situations.

[0044] Embodiment 1

[0045] See Figures 1 to 4 , the utility model provides a detection and protection device for the pile head of a steel pipe pile, which includes a pile cushion 1 and an inner support structure 2. The pile cushion 1 is placed on the top surface of the foundation pile, that is, between the top surface of the foundation pile and the pile hammer. The inner support structure 2 is arranged to fit the inner diameter of the steel pipe pile, and the inner support structure 2 is arranged inside the pile head of the steel pipe pile;

[0046] The inner support structure 2 includes a lining layer 3, a support groove 4, an adjustable lead screw 5, a bite groove 6, a hook 7, and a thread head 8;

[0047] The pile cushion includes an elastic layer, a rigid layer, a threaded port 11, and a force - transmitting steel column 12.

[0048] The rigid layer includes two upper and lower steel plate layers 10. The elastic layer includes a rubber structure layer 9 arranged between the two steel plate layers 10 and a rubber sleeve sleeved outside the steel plate layer 10;

[0049] The steel plate layer 10 and the rubber structure layer 9 are arranged in an alternating laminated manner, and a number of force - transmitting steel columns 12 are welded between the two steel plate layers 10.

[0050] The pile cushion is used to be placed on the top surface of the foundation pile, that is, located between the top surface of the foundation pile and the pile hammer. The elastic layer is the main structural layer of the pile cushion, which has good elasticity and protects the steel pipe pile. The steel plate layer 10 is arranged inside the pile cushion and between the rubber structure layers, and is used to transmit force to the foundation pile without affecting the wave velocity of the pile body. The composite - structure pile cushion composed of an elastic layer and a rigid layer has good protection, high stability, can be recycled, ensures that the pile cushion is not damaged when being hammered, and can also ensure the accuracy of the hammering detection test results.

[0051] The force - transmitting steel columns 12 connect the upper and lower steel plates into a whole and are used for better force transmission.

[0052] The internal support structure 2 adopts a split - type design. This structure is at least divided into two pieces, and each piece is designed as an arc - shaped steel plate that fits the inner diameter of the steel pipe pile;

[0053] The threaded port 11 is arranged at the bottom surface of the pile cushion. When setting the steel plate layer 10, the threaded port 11 is welded to the steel plate and is wrapped by an external rubber sleeve. The inner ring of the threaded port 11 is provided with internal threads. Since the pile head of the steel pipe pile has a variable - diameter design and the pile - mouth diameter is the smallest, in order to put the internal support structure in, a split design is adopted. This structure is at least divided into two pieces, and each piece is designed as an arc - shaped steel plate that fits the inner diameter of the steel pipe pile. The size of the internal support structure is set for steel pipe piles with different pile diameters and is arranged inside the pile head of the steel pipe pile. Due to the variable - diameter design of the steel pipe pile, it is easy to be indented and deformed when being hammered. The internal support structure is set to help the pile head bear force and resist deformation, and is also used to connect the pile cushion to prevent the pile cushion from shifting.

[0054] The inner lining layer 3 is set as a rubber layer and is laid on the outer surface of the internal support structure 2 to protect the inner wall of the steel pipe pile and prevent the steel pipe pile from being damaged when being hammered and extruding the internal support structure.

[0055] The support grooves 4 are symmetrically opened in the arc - shaped steel plates of the internal support structure 2. The inner walls of the support grooves 4 are provided with threads, and the support grooves 4 are in threaded match with the adjustable lead screws 5;

[0056] Multiple groups of support grooves 4 are arranged vertically.

[0057] The material of the adjustable lead screw 5 is iron or steel. Threads are provided at both ends of the adjustable lead screw 5, and it can be telescopically adjusted. It is used to be screwed into the support grooves of the arc - shaped steel plates of the two internal support structures to make the whole stable and support the steel pipe pile from the inside to prevent deformation.

[0058] The bite grooves 6 are arranged at the interfaces of the two arc - shaped steel plates of the internal support structure 2 and are used to bite and fix the two arc - shaped steel plates to prevent the two arc - shaped steel plates from shifting.

[0059] The hook 7 is arranged on the upper parts of two arc-shaped steel plates of the inner support structure 2 and is used for temporary suspension during the assembly of the inner support structure 2. The hook is suspended at the opening of the steel pipe pile.

[0060] The thread head 8 is arranged at the upper opening of the arc-shaped steel plate of the inner support. The thread head 8 is provided with an external thread and is used for connecting and fixing with the threaded opening 11 of the pile cushion 1.

[0061] During use, it includes the following steps:

[0062] The first step: According to the pile diameter and slope of the on-site steel pipe pile, the pile cushion 1 and the inner support structure 2 are produced and manufactured. Since the top of the steel pipe pile is designed with a variable diameter and the diameter at the orifice is the smallest, in order to smoothly place the inner support structure, the inner support structure adopts a segmented design and is placed in segments. The inner support structure 2 is composed of two arc-shaped steel plates, and the height of the steel plate is less than the diameter of the opening of the steel pipe pile.

[0063] The second step: First, put the first arc-shaped steel plate into the steel pipe pile and temporarily fix it at the opening of the steel pipe pile with the hook 7.

[0064] The third step: Then put the second arc-shaped steel plate into the steel pipe pile, splice the two arc-shaped steel plates, align the 6 at the edges of the two arc-shaped steel plates, so that the inner support structure 2 fits tightly with the steel pipe pile.

[0065] The fourth step: The thread head 8 protrudes from the pile opening, put the adjustable screw rod 5 into it, top it to the lowest support groove 4, and screw the adjustable screw rod 5 into the support groove 4.

[0066] The fifth step: Put the second adjustable screw rod 5 into the inner support structure 2. The second adjustable screw rod 5 is placed above the first adjustable screw rod 5 and is perpendicular to the first adjustable screw rod 5. The support groove 4 is arranged at the biting place of the two arc-shaped steel plates, and screw the adjustable screw rod into the support groove 4.

[0067] The sixth step: Put the third adjustable screw rod 5 into it. The third adjustable screw rod 5 is arranged at the upper part, is parallel to the first adjustable screw rod 5 and is perpendicular to the second adjustable screw rod 5, and screw it into the support groove 4.

[0068] The seventh step: Put the hook 7 into the inside of the inner support structure 2, screw the threaded opening 11 of the pile cushion onto the thread head 8 of the inner support structure to make it fit tightly. The pile cushion is close to the pile head of the steel pipe pile. After the setting is completed, the hammering test can be carried out.

[0069] Embodiment 2

[0070] On the basis of Embodiment 1, the material of the pile cushion can be appropriately adjusted, and the combination form can also be adjusted. In principle, a composite material combining rigidity and flexibility is selected. The flexible material plays a protective role, and the rigid material can transmit force better.

[0071] Embodiment 3

[0072] On the basis of Embodiment 1, the internal support structure can adopt a more segmented form, and the appropriate number of component segments can be selected according to the diameter of the variable-diameter steel pipe pile mouth.

[0073] Embodiment 4

[0074] On the basis of Embodiment 1, the number of adjustable lead screws can be increased, and other materials with sufficient support strength can be selected.

[0075] Embodiment 5

[0076] On the basis of Embodiment 1, the thread connection between the upper part of the internal support structure and the pile cushion can also adopt other forms such as snap fasteners.

[0077] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. 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 steel pipe pile head hammer foundation detection and protection device, characterized in that: It comprises a pile pad (1) and an inner support structure (2), wherein the pile pad (1) is placed on the top surface of the foundation pile, that is, between the top surface of the foundation pile and the pile hammer, and the inner support structure (2) is arranged to fit the inner diameter of the steel pipe pile, and the inner support structure (2) is arranged inside the head of the steel pipe pile; The inner support structure (2) comprises an inner lining layer (3), a support groove (4), an adjustable screw rod (5), a bite groove (6), a hook (7), and a screw head (8); The pile pad comprises an elastic layer, a rigid layer, a threaded opening (11), and a force-transmitting steel column (12); The rigid layer comprises two upper and lower steel plate layers (10), and the elastic layer comprises a rubber structural layer (9) arranged between the two steel plate layers (10) and a rubber sleeve sleeved outside the steel plate layers (10); The steel plate layers (10) and the rubber structure layers (9) are arranged in an alternating stacked manner, and a plurality of force-transmitting steel columns (12) are welded between two steel plate layers (10); The inner support structure (2) adopts a split-piece design, and the structure is divided into at least two pieces, each piece is designed to be a curved steel plate that fits the inner diameter of the steel pipe pile; The threaded opening (11) is arranged on the bottom surface of the pile pad, and when the steel plate layer (10) is arranged, the threaded opening (11) is welded to the steel plate and wrapped by an external rubber sleeve, and an inner circle of the threaded opening (11) is provided with an internal thread; The inner lining layer (3) is configured as a rubber layer and is paved on the outer surface of the inner support structure (2); The support groove (4) is symmetrically arranged in the arc-shaped steel plate of the inner support structure (2), the inner wall of the support groove (4) is provided with a thread, and the support groove (4) matches the thread of the adjustable screw rod (5); The support grooves (4) are arranged in multiple groups in the vertical direction; The adjustable screw rod (5) is made of iron or steel, and both ends of the adjustable screw rod (5) are provided with threads; The engagement groove (6) is arranged at the interface between the two arc-shaped steel plates of the inner support structure (2) and is used for the engagement and fixing of the two arc-shaped steel plates; The hook (7) is arranged on the upper part of the two arc-shaped steel plates of the inner supporting structure (2) and is used for temporary suspension when assembling the inner supporting structure (2). The hook is suspended at the mouth of the steel pipe pile. The thread head (8) is arranged on the upper end of the inner supporting arc-shaped steel plate, and the thread head (8) is provided with an external thread for being connected and fixed with the threaded opening (11) of the pile pad (1).

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