Cast-in-place pile for civil construction

Abstract

The utility model belongs to the technical field of cast-in-place piles, and discloses a cast-in-place pile for civil construction, which comprises a pile casing which is of a cylindrical hollow pipe structure, and a plurality of balls are rotatably connected to the inner wall of the pile casing; the utility model discloses a cast-in-place pile for civil construction, which comprises a pile casing and a concrete guide pipe, the concrete guide pipe is of a cylindrical hollow pipe structure, the radius of the concrete guide pipe is larger than that of the pile casing, and a plurality of balls are rotatably connected between the pile casing and the concrete guide pipe. Due to the fact that the inside of the pile casing is connected with the concrete guide pipe through the balls, the concrete guide pipe bears the pressure of concrete, the pressure of the cast-in-place pile is dispersed, the cast-in-place pile can be effectively prevented from being damaged, meanwhile, supporting through a supporting arm is not needed, and therefore the steel bar cylinder can enter a pile hole conveniently; only the connecting part positioned at the lower part of the upper-end protective cylinder enters the slot positioned at the upper part of the lower-end protective cylinder, so that the connection is convenient, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cast-in-place piles, in particular to a cast-in-place pile for civil engineering construction. Background Art

[0002] A bored pile is a pile made by drilling a hole in place and pouring concrete or reinforced concrete. Commonly used ones are: (1) bored pile: a pile is made by drilling a hole in place and pouring concrete using a spiral drill, a submersible drill, etc. There is no vibration and no soil squeezing during construction, but the settlement of the pile is slightly larger. Spiral drills are suitable for clay, sand and artificial fill above the groundwater level. The drilled soil blocks rise along the spiral blades on the drill rod and are discharged out of the hole. The hole diameter is about 300mm and the drilling depth is 8 to 12m. The drill rod is selected according to the soil quality and water content. Submersible drills are suitable for drilling clay, sand, silt and silty soil, especially in soil layers with high groundwater levels. Mud is used to protect the wall when drilling to prevent collapse. Use clean water to drill in clay and make your own mud to protect the wall; inject prepared mud into sand for drilling. Use mud circulation to remove soil debris removed by drilling. After drilling to the required depth, clean the hole to remove soil debris at the bottom of the hole and reduce the settlement of the pile.

[0003] For example, a cast-in-place pile for civil engineering construction with publication number CN215801574U is provided with a support arm to prevent it from breaking. However, during the cast-in-place construction process, a steel tube needs to be added inside the pile hole. Since the support arm is provided in the cast-in-place pile, the steel tube cannot be put into the pile hole. At the same time, the cast-in-place pile has a fixed length. If the soil in the construction area is relatively soft, the length of the casing needs to be increased, and the cast-in-place pile cannot provide a lengthening function. In order to solve the above problems, a cast-in-place pile for civil engineering construction is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a cast-in-place pile for civil engineering construction in order to solve the above problems.

[0005] The technical solution adopted by the utility model is as follows: a cast-in-place pile for civil engineering construction, comprising:

[0006] The casing is a cylindrical hollow tube structure, and a plurality of balls are rotatably connected to the inner wall of the casing;

[0007] The concrete conduit is a cylindrical hollow tube structure, and its radius is greater than the radius of the casing. A plurality of balls are rotatably connected between the casing and the concrete conduit.

[0008] Through the above technical solution, during the construction of bored piles, the casing is first placed in the pre-dug hole. Since the inside of the casing is connected to the concrete conduit through balls, the casing is only subjected to external pressure, while the concrete conduit is subjected to the pressure of the concrete, thereby dispersing the pressure of the bored pile, which can effectively prevent the bored pile from being damaged. At the same time, it does not need to be supported by a support arm, thereby facilitating the steel bar tube to enter the pile hole.

[0009] In a preferred embodiment, a slot is formed at the upper end between the casing and the concrete conduit.

[0010] In a preferred embodiment, a connecting portion is integrally provided at the lower end of the casing, and the radius and position of the connecting portion are the same as those of the slot.

[0011] Through the above technical solution, when the length of the casing needs to be increased, only two casings need to be stacked vertically. At this time, the connecting part at the lower part of the upper casing enters the slot at the upper part of the lower casing, which is convenient for connection and improves construction efficiency.

[0012] In a preferred embodiment, lifting rings are integrally provided on both left and right sides of the top of the casing.

[0013] Through the above technical solution, the casing can be easily hoisted by providing a hoisting ring.

[0014] In a preferred embodiment, the upper end of the casing is provided with second connection holes on both the front and rear sides, the connecting portion is provided with first connection holes on both the front and rear sides, and the first connection hole and the second connection hole are located at the same position.

[0015] Through the above technical solution, after the two casings are connected, the two casings are fixedly connected by passing bolts through the first connecting hole and the second connecting hole in sequence.

[0016] In a preferred embodiment, the wall thickness of the casing and the concrete conduit are both 10 mm.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are as follows: the utility model provides a cast-in-place pile for civil engineering construction.

[0018] 1. During the construction of bored piles, the casing is first placed in the pre-dug hole. Since the inside of the casing is connected to the concrete conduit through a ball bearing, the casing is only subjected to external pressure, while the concrete conduit is subjected to the pressure of the concrete, thereby dispersing the pressure of the bored pile and effectively preventing damage to the bored pile. At the same time, it does not need to be supported by a support arm, making it easier for the steel bar to enter the pile hole.

[0019] 2. When the length of the casing needs to be increased, just stack the two casings vertically. At this time, the connecting part at the lower part of the upper casing enters the slot at the upper part of the lower casing, which is convenient for connection and improves construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model.

[0022] Markings in the figure: 1-casing; 2-ball; 3-concrete conduit; 4-slot; 5-connecting part; 6-first connecting hole; 7-second connecting hole; 8-lifting ring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The following will be combined Figure 1-2 A cast-in-place pile for civil engineering construction according to an embodiment of the utility model is described in detail.

[0025] Example:

[0026] A cast-in-place pile for civil engineering construction, comprising:

[0027] The casing 1 is a cylindrical hollow tube structure, and a plurality of balls 2 are rotatably connected to the inner wall of the casing 1. Lifting rings 8 are integrally provided on both the left and right sides of the top of the casing 1, and the casing 1 is conveniently hoisted by providing the lifting rings 8;

[0028] The concrete conduit 3 is a cylindrical hollow tube structure, and its radius is greater than the radius of the casing 1. The wall thickness of the casing 1 and the concrete conduit 3 is 10 mm. A plurality of balls 2 are rotatably connected between the casing 1 and the concrete conduit 3. During the construction of the cast-in-place pile, the casing 1 is first placed in a pre-dug hole. Since the casing 1 is connected to the concrete conduit 3 through the balls 2, the casing 1 is only subjected to external pressure, while the concrete conduit 3 is subjected to the pressure of the concrete, thereby dispersing the pressure of the cast-in-place pile, which can effectively prevent the cast-in-place pile from being damaged. At the same time, it does not need to be supported by a support arm, so that the steel bar tube can enter the pile hole easily;

[0029] A slot 4 is formed at the upper end between the casing 1 and the concrete conduit 3, and a connecting portion 5 is integrally provided at the lower end of the casing 1. The radius and position of the connecting portion 5 and the slot 4 are the same. When the length of the casing 1 needs to be increased, the two casings 1 only need to be stacked vertically. At this time, the connecting portion 5 located at the lower part of the upper casing 1 enters the slot 4 located at the upper part of the lower casing 1, which is convenient for connection and improves construction efficiency. Second connecting holes 7 are provided on both the front and rear sides of the upper end of the casing 1, and first connecting holes 6 are provided on both the front and rear sides of the connecting portion 5. The positions of the first connecting hole 6 and the second connecting hole 7 are the same. When the two casings 1 are connected, the two casings 1 are fixedly connected by passing bolts through the first connecting hole 6 and the second connecting hole 7 in sequence.

[0030] Working principle:

[0031] During the bored pile construction process, the casing 1 is first placed into the pre-dug hole. Since the casing 1 is connected to the concrete conduit 3 via the ball bearings 2, the casing 1 is only subjected to external pressure, while the concrete conduit 3 is subjected to the pressure of the concrete, thereby dispersing the pressure of the bored pile and effectively preventing damage to the bored pile. At the same time, it does not need to be supported by a support arm, thereby facilitating the steel bar tube to enter the pile hole.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cast-in-place pile for civil engineering construction, characterized in that: include: The casing (1) is a cylindrical hollow tube structure, and a plurality of balls (2) are rotatably connected to the inner wall of the casing (1); The concrete conduit (3) is a cylindrical hollow tube structure, and its radius is greater than the radius of the casing (1). A plurality of balls (2) are rotatably connected between the casing (1) and the concrete conduit (3).

2. A cast-in-place pile for civil engineering construction as claimed in claim 1, characterized in that: A slot (4) is formed at the upper end between the casing (1) and the concrete conduit (3).

3. A cast-in-place pile for civil engineering construction as claimed in claim 1, characterized in that: The lower end of the casing (1) is integrally provided with a connecting portion (5), and the connecting portion (5) and the slot (4) have the same radius and position.

4. A cast-in-place pile for civil engineering construction as claimed in claim 1, characterized in that: Lifting rings (8) are integrally provided on both left and right sides of the top of the casing (1).

5. A cast-in-place pile for civil engineering construction as claimed in claim 3, characterized in that: The upper end of the protective tube (1) is provided with a second connection hole (7) on both the front and rear sides, and the connecting portion (5) is provided with a first connection hole (6) on both the front and rear sides. The first connection hole (6) and the second connection hole (7) are located at the same position.

6. A cast-in-place pile for civil engineering construction as claimed in claim 1, characterized in that: The wall thickness of the casing (1) and the concrete conduit (3) are both 10 mm.

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