Pile top reinforcing structure of cast-in-place pile test pile

Abstract

The utility model discloses a cast-in-place pile test pile top reinforcing structure, and relates to the technical field of foundation piles, the cast-in-place pile test pile top reinforcing structure comprises a pile position and a pile casing arranged in the pile position, a reinforcement cage assembly is inserted in the pile casing, the reinforcement cage assembly comprises a plurality of reinforcement rings and a plurality of steel bars, and the top of the reinforcement cage assembly is sleeved with a reinforcing cylinder. According to the pile top reinforcing structure of the cast-in-place pile test pile, the reinforcing cylinder is arranged on the top of the reinforcement cage assembly in a sleeving mode, the inner wall of the reinforcing cylinder is fixedly welded to the two reinforcement rings arranged on the top in the reinforcement cage assembly, the pile top can be reinforced and protected, the impact strength is enhanced, and meanwhile the first steel mesh and the second steel mesh are arranged in a matched mode. A plurality of steel bars inserted inside can be limited and reinforced, the bending deformation resistance of the steel bars is enhanced, the whole reinforcing structure prevents the top of the test pile from being damaged in the initial stage of the test pile, the smoothness of the subsequent test pile process is guaranteed, and therefore the accuracy of the final test pile result is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation piles, in particular to a reinforcing structure for the top of a cast-in-place pile test pile. Background Technique

[0002] A cast-in-place pile is a pile formed by forming a hole in place and pouring concrete or reinforced concrete. Commonly used ones are: (1) Bored cast-in-place pile: It is formed by using a spiral drill, a submersible drill, etc. to form a hole in place and pour concrete. According to the soil quality and water content, the drill pipe is selected. The submersible drill is suitable for cohesive soil, sandy soil, silt and silty clay, etc., especially suitable for forming holes in soil layers with relatively high groundwater levels. When drilling, slurry is used to protect the hole to prevent collapse. In clay, drilling is carried out with clean water to form self-made slurry for hole protection; in sandy soil, the prepared slurry should be injected for drilling, and the slurry circulation is used to remove the cuttings drilled. After drilling to the required depth, the hole should be cleaned to remove the cuttings deposited at the bottom of the hole and reduce the settlement of the pile. (2) Driven cast-in-place pile: A steel pipe with a reinforced concrete pile shoe (pile tip) or a flap-type pile shoe is driven into the soil by hammering or vibration, and then concrete is poured while pulling out the pipe to form a pile.

[0003] Since the existing construction technology of cast-in-place piles is complex and patterned, the construction quality is often difficult to guarantee. In particular, the insufficient concrete strength at the top of the cast-in-place pile is a relatively common quality problem. The cast-in-place pile test pile is a single-pile bearing capacity ultimate value load test carried out in advance during the construction of cast-in-place piles. Before the test, due to the insufficient structural strength of the test pile top, during the engineering test pile process, the existing pile top is prone to premature damage, resulting in inaccurate subsequent results of the load test. Content of the Utility Model

[0004] The purpose of the utility model is to provide a reinforcing structure for the top of a cast-in-place pile test pile to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A reinforcing structure for the top of a cast-in-place pile test pile includes a pile position and a casing arranged inside the pile position. A steel reinforcement cage assembly is inserted inside the casing. The steel reinforcement cage assembly includes a plurality of steel reinforcement rings and a plurality of steel bars. A reinforcing cylinder is sleeved on the top of the steel reinforcement cage assembly. A first steel mesh and a second steel mesh are successively fixedly welded on the inner wall of the reinforcing cylinder. A pressing plate is welded to the top end of the reinforcing cylinder, and a plurality of jacks are opened on the pressing plate;

[0006] Two alignment steel wires are fixedly connected to the top end of the reinforcing cylinder. A reflective sticker is fixedly pasted at the intersection of the two alignment steel wires. Four operation blocks are symmetrically and fixedly welded on the side wall of the reinforcing cylinder, and connection grooves are opened in the middle of the four operation blocks.

[0007] As a preferred technical solution of the present utility model, multiple said steel bar rings are arranged at equal intervals, multiple said steel bars respectively penetrate through the interiors of the multiple steel bar rings, and multiple said steel bars are respectively welded to the multiple steel bar rings.

[0008] As a preferred technical solution of the present utility model, the two said steel bar rings placed at the top are sequentially welded and fixed to the inner wall of the reinforcement cylinder.

[0009] As a preferred technical solution of the present utility model, multiple said steel bars sequentially penetrate through the first steel mesh and the second steel mesh, and the first steel mesh and the second steel mesh are respectively placed at the bottom and the bottom of the two steel bar rings at the top.

[0010] As a preferred technical solution of the present utility model, a perfusion groove is provided at the center of the pressing plate.

[0011] As a preferred technical solution of the present utility model, the tops of multiple said steel bars respectively penetrate through multiple jacks.

[0012] As a preferred technical solution of the present utility model, the two said alignment steel wires are arranged perpendicular to each other, and the two said alignment steel wires are both placed between the pressing plate and the reinforcement cylinder.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By providing a reinforcement cylinder sleeved on the top of the steel reinforcement cage assembly, the inner wall of which is respectively fixedly welded to the two steel bar rings placed at the top in the steel reinforcement cage assembly, the top of the pile can be reinforced and protected, the impact resistance strength can be enhanced, and at the same time, with the cooperation of the internally arranged first steel mesh and second steel mesh, the multiple steel bars inserted therein can be limited and strengthened, and their anti-bending and deformation resistance capabilities can be enhanced. The overall reinforcement structure avoids the damage of the top of the test pile in the initial stage of the test pile, ensures the smooth progress of the subsequent test pile process, and thus guarantees the accuracy of the final test pile result.

[0015] 2. By providing a pressing plate at the top end of the reinforcement cylinder, the anti-impact protection of the top of the test pile is further improved, and the surface breakage and deformation of the initial test pile are avoided. With the cooperation of the two alignment steel wires and the reflective stickers at the bottom thereof, before pouring concrete, the centering placement of the steel reinforcement cage assembly can be adjusted with reference, and the adjustment can be conveniently achieved by means of multiple operation blocks, enriching the functions of the reinforcement cylinder and reducing the placement difficulty of the steel reinforcement cage assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the steel reinforcement cage assembly part of the present utility model;

[0018] Figure 3This is a schematic structural diagram of the reinforcement cylinder part of the utility model.

[0019] In the figure: 1, pile position; 2, casing; 3, steel cage assembly; 31, steel bars; 32, steel rings; 4, reinforcement cylinder; 5, operation block; 6, connection groove; 7, first steel mesh; 8, alignment steel wire; 9, reflective sticker; 10, pressing plate; 11, pouring groove; 12, jack; 13, second steel mesh. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1 to 3 , the present utility model provides a technical solution for the pile top reinforcement structure of a cast-in-place pile test pile:

[0022] Embodiment 1:

[0023] According to Figure 1 , Figure 2 As shown, a pile top reinforcement structure for a cast-in-place pile test pile includes a pile position 1 and a casing 2 arranged inside the pile position 1. A steel cage assembly 3 is inserted inside the casing 2. The steel cage assembly 3 includes a plurality of steel rings 32 and a plurality of steel bars 31. A reinforcement cylinder 4 is sleeved on the top of the steel cage assembly 3. The reinforcement cylinder 4 is sleeved on the top position of the steel cage assembly 3, that is, to reinforce and protect the pile top part after pouring to avoid damage during the test pile stage. The inner wall of the reinforcement cylinder 4 is fixedly welded with a first steel mesh 7 and a second steel mesh 13 in sequence. The first steel mesh 7 and the second steel mesh 13 limit and reinforce the plurality of steel bars 31 passing through. A pressing plate 10 is welded to the top end of the reinforcement cylinder 4, and a plurality of jacks 12 are opened on the pressing plate 10.

[0024] The plurality of steel rings 32 are arranged at equal intervals. The plurality of steel bars 31 respectively penetrate through the inside of the plurality of steel rings 32. The plurality of steel bars 31 are respectively welded to the plurality of steel rings 32. The two steel rings 32 at the top are sequentially welded and fixed to the inner wall of the reinforcement cylinder 4. The plurality of steel bars 31 sequentially penetrate through the first steel mesh 7 and the second steel mesh 13. The first steel mesh 7 and the second steel mesh 13 are respectively located at the bottom and the bottom of the two steel rings 32 at the top. A pouring groove 11 is opened at the center of the pressing plate 10. After pouring concrete from the pouring groove 11, it fills the bottom of the pre-pressing plate 10. Thus, the pressing plate 10 is placed on the top surface, which can strengthen the protection of the pile top surface and avoid damage to the pile top surface during the test pile stage, affecting the load capacity detection of the entire pile body. The top parts of the plurality of steel bars 31 respectively penetrate through the plurality of jacks 12.

[0025] In specific use, the utility model provides a reinforcement structure for the top of a bored pile test pile. During bored pile construction, a casing 2 is first inserted into the pile position 1, a hole is drilled in the casing 2, and a steel cage assembly 3 is placed in after the hole is cleaned. The same steps are followed during the test pile. The steel cage assembly 3 at the top of the pile is sheathed with a reinforcement tube 4. A plurality of steel bars 31 pass through the first steel mesh 7 and the second steel mesh 13 in sequence, and then are inserted from a plurality of insertion holes 12, thereby further reinforcing the top of the test pile to avoid damage to the pile top during the test pile stage that affects the test pile process. The first steel mesh 7 and the second steel mesh 13 can vertically limit the plurality of steel bars 31 to enhance their resistance to bending and deformation.

[0026] Embodiment 2:

[0027] Based on the first embodiment, Figure 1 and Figure 3 As shown, two alignment steel wires 8 are fixedly connected to the top of the reinforcement tube 4, and a reflective tape 9 is fixedly pasted at the intersection of the two alignment steel wires 8. The reflective tape 9 has a more obvious prompt effect. The operator can directly compare the reflective tape 9 with the center point position of the protective tube 2. Four operating blocks 5 are symmetrically fixed and welded on the side wall of the reinforcement tube 4. A connecting groove 6 is provided in the middle of the four operating blocks 5. The two alignment steel wires 8 are arranged perpendicular to each other, and the two alignment steel wires 8 are placed between the pressure plate 10 and the reinforcement tube 4.

[0028] During specific use, the utility model provides a reinforcement structure for the top of a bored pile test pile. After the steel cage assembly 3 is placed, it is necessary to adjust the steel cage assembly 3 to be aligned with the center of the casing 2. At this time, the reinforcement tube 4 sleeved on the steel cage assembly 3 can be used. The two alignment steel wires 8 set on the top have an intersection because they are perpendicular to each other. A reflective sticker 9 is set at the intersection, so that the operator can directly compare the position of the reflective sticker 9 relative to the center point of the casing 2, and adjust the center placement of the steel cage assembly 3. The specific adjustment operation can be carried out with the help of a driving structure such as a cylinder or a telescopic rod, which is inserted into the connecting groove 6. The connecting grooves 6 in multiple directions are all inserted into the driving structure. According to the position difference between the reflective sticker 9 and the center point of the casing 2, the corresponding pushing operation block 5 is used to push the reinforcement tube 4 to be aligned, so that the center point of the casing 2 coincides with the reflective sticker 9, that is, the center placement of the steel cage assembly 3 is adjusted.

[0029] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0031] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one solution", "some solutions", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the solution or example are included in at least one solution or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same solution or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more solutions or examples.

Claims

1. A pile top reinforcement structure for a cast-in-place pile test pile, comprising a pile position (1) and a casing (2) arranged inside the pile position (1), characterized in that: A steel reinforcement cage assembly (3) is inserted inside the casing (2). The steel reinforcement cage assembly (3) includes a plurality of steel reinforcement rings (32) and a plurality of steel bars (31). A reinforcement cylinder (4) is sleeved on the top of the steel reinforcement cage assembly (3). A first steel mesh (7) and a second steel mesh (13) are successively and fixedly welded to the inner wall of the reinforcement cylinder (4). A pressing plate (10) is welded to the top end of the reinforcement cylinder (4). A plurality of insertion holes (12) are formed in the pressing plate (10). Two alignment steel wires (8) are fixedly connected to the top end of the reinforcement cylinder (4). A reflective sticker (9) is fixedly pasted at the intersection of the two alignment steel wires (8). Four operating blocks (5) are symmetrically and fixedly welded to the side wall of the reinforcement cylinder (4). Connecting grooves (6) are formed in the middle of the four operating blocks (5).

2. The pile top reinforcement structure of a bored pile test pile according to claim 1, characterized in that: The plurality of steel reinforcement rings (32) are arranged at equal intervals. The plurality of steel bars (31) respectively penetrate through the interiors of the plurality of steel reinforcement rings (32). The plurality of steel bars (31) are respectively welded to the plurality of steel reinforcement rings (32).

3. The pile top reinforcement structure for the test pile of cast-in-place pile according to claim 1, characterized in that: The two steel reinforcement rings (32) placed at the top are successively welded and fixed to the inner wall of the reinforcement cylinder (4).

4. The pile top reinforcement structure for cast-in-place pile test piles according to claim 1, characterized in that: The plurality of steel bars (31) successively penetrate through the first steel mesh (7) and the second steel mesh (13). The first steel mesh (7) and the second steel mesh (13) are respectively placed at the bottom and the bottom of the two steel reinforcement rings (32) at the top.

5. The pile top reinforcement structure of a cast-in-place pile test pile according to claim 1, characterized in that: A perfusion groove (11) is formed at the center of the pressing plate (10).

6. The pile top reinforcement structure for a cast-in-place pile test pile according to claim 1, characterized in that: The top parts of the plurality of steel bars (31) respectively penetrate through the plurality of insertion holes (12).

7. A pile top reinforcement structure for a cast-in-place pile test pile according to claim 1, characterized in that: The two alignment steel wires (8) are arranged perpendicular to each other. The two alignment steel wires (8) are both located between the pressing plate (10) and the reinforcement cylinder (4).

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