A compression- and tension-resistant tower-type prestressed concrete pile and a processing method thereof

Abstract

The present invention relates to a compression-resistant and tension-resistant tower prestressed concrete pile and a processing method, wherein there are multiple main bars located inside the pile body and evenly arranged vertically; the end surface of the end plate is provided with multiple longitudinally penetrating locking bars holes for connecting the main bars, and the end plate is located at the top and bottom of the pile body. The pile body is integrally formed, and includes: a first sunken end, which is located at one end of the pile body and has a uniform shape up and down; a second sunken end, which is located at the other end of the pile body and includes a cone and a uniform shape part; a pile section, wherein there are multiple pile sections, which are located between the first sunken end and the second sunken end, and include a cone and a uniform shape part, wherein the bottom of the cone has the same cross-sectional shape as the uniform shape part, and the cone shrinks linearly upward, and the non-fitting part between the bottom of the uniform shape part and the top of the next pile section is the main bearing surface. The present invention can improve the compressive performance or compression resistance of the pile body, thereby improving the safety of the building or reducing the number of foundation piles used.

Description

Technical Field

[0001] The invention belongs to the field of concrete piles, and in particular relates to a compression-resistant and tension-resistant tower-type prestressed concrete pile and a processing method thereof. Background Art

[0002] With the rapid development of urban construction, the land resources available for construction are becoming less and less. Therefore, housing construction is developing towards high-rise, and various high-rise and super-high-rise buildings have become the dominant force in current construction. For the foundation engineering of high-rise and super-high-rise buildings, the requirements for foundation bearing capacity are getting higher and higher. In some structures in the project, the pile foundation not only bears the vertical pressure from the upper structure, but also bears the buoyancy caused by groundwater, and the pulling force on the pile foundation caused by the swaying caused by the wind resistance of the building, that is, the pile foundation not only needs to resist pressure, but also needs a certain amount of pull-out resistance. Therefore, it is necessary to solve the compression and pull-out problems at the same time. There are several main ways to improve the compression and pull-out resistance of existing concrete piles: the bearing capacity and compression modulus of the soil between piles are increased by the compaction and compaction of the soil between piles, and the friction is increased; by pressure grouting the foundation grouting pipe, the pile side and pile end resistance and the bearing capacity and deformation modulus of the soil layer are significantly improved.

[0003] The above two traditional methods put forward higher requirements on the number of piles and foundation structure, and mainly improve the compressive and tensile resistance of prestressed concrete piles by means of friction. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a tower type prestressed concrete pile that is resistant to compression and pull-out and a processing method thereof, wherein the friction force is transformed into friction force plus vertical pressure through the long-term squeezing effect of the soil after the concrete pile is pressed in, and the compression and pull-out resistance can be specifically enhanced by adjusting the pressing method according to the construction requirements.

[0005] The present invention adopts the following technical scheme: a compression and tension resistant tower prestressed concrete pile, comprising: an end plate, main reinforcement, and a pile body, wherein the main reinforcement is multiple and located inside the pile body and evenly arranged vertically; a plurality of locking reinforcement holes for connecting the main reinforcement are opened on the end surface of the end plate and are longitudinally penetrated, and the end plate is located at the top and bottom of the pile body.

[0006] The pile body is integrally formed and comprises:

[0007] The first sinking end is located at one end of the pile body and has a uniform shape from top to bottom.

[0008] a second sunken end, the second sunken end being located at the other end of the pile body and comprising a tapered portion and a uniformly shaped portion,

[0009] Pile segments, there are multiple pile segments, located between the first sinking end and the second sinking end, including a conical portion and a uniform portion, the bottom of the conical portion has the same cross-sectional shape as the uniform portion, the conical portion linearly shrinks upward, and the portion that does not fit between the bottom of the uniform portion and the top of the next pile segment is the main bearing surface; the height of the uniform portion is smaller than the height of the uniformly shaped portion of the second sinking end.

[0010] Furthermore, the uniformly shaped portion of the first sinking end, the second sinking end, and the uniform portion of the pile section have completely the same cross-sectional shape and size.

[0011] Furthermore, the first sinking end, the second sinking end and the pile section main structure are square piles, the cross-sectional shape of the first sinking end is square, the cone of the pile section includes four inclined surfaces, and the uniform part of the pile section and the uniform shape part of the second sinking end are square.

[0012] Furthermore, the first sinking end, the second sinking end and the pile segment main structure are round piles, the cross-sectional shape of the first sinking end is round, the cone of the pile segment includes a conical surface, and the uniform portion of the pile segment and the uniform shape portion of the second sinking end are round.

[0013] Furthermore, the first sinking end, the second sinking end and the pile segment main structure are polygonal piles, the cross-sectional shape of the first sinking end is polygonal, the cone of the pile segment includes a plurality of inclined surfaces, and the uniform portion of the pile segment and the uniform shape portion of the second sinking end are polygonal.

[0014] Furthermore, the first sunken end, the second sunken end, and the corners of the pile segment main structure are rounded or chamfered.

[0015] Furthermore, the pile body structure is one of the following: solid, hollow, and semi-hollow.

[0016] Correspondingly, a method for processing a compression-resistant and tension-resistant tower prestressed concrete pile is disclosed, which adopts a casting method or a centrifugal method and is formed by a mold; when the pile body structure is hollow or semi-hollow, a core mold structure is adopted.

[0017] The processing method of the compression-resistant and tension-resistant tower type prestressed concrete pile of the present invention comprises casting and centrifugal method, and the processing is carried out in cooperation with corresponding molds.

[0018] Beneficial effects of the present invention:

[0019] The compression- and tension-resistant tower prestressed concrete pile described in the present invention has a variety of structures, each of which is provided with a plurality of pile sections. After the pile body enters the soil, the soil is squeezed and compacted in the cone, thereby generating a vertical force on the main bearing surface. The direction of the main bearing surface can be changed by changing whether the first sinking end and the second sinking end are facing downward, thereby significantly improving the compression resistance or compression resistance of the pile body, thereby improving the building safety or reducing the number of foundation piles used. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a case where the compression-resistant and tension-resistant tower-type prestressed concrete pile of the present invention is a square pile;

[0021] Figure 2 It is a cross-sectional schematic diagram when the compression-resistant and tension-resistant tower type prestressed concrete pile of the present invention is a hollow square pile;

[0022] Figure 3 It is a cross-sectional schematic diagram of a tower type prestressed concrete pile resistant to compression and tension according to the present invention when it is a solid square pile;

[0023] Figure 4 It is a three-dimensional schematic diagram of a case where the compression-resistant and tension-resistant tower-type prestressed concrete pile of the present invention is a round pile;

[0024] Figure 5 It is a three-dimensional schematic diagram of the compression-resistant and tension-resistant tower type prestressed concrete pile of the present invention when it is a polygonal pile.

[0025] In the figure: 1, first sinking end; 2, second sinking end; 3, pile section; 301, cone part; 302, uniform part; 303, main bearing surface. DETAILED DESCRIPTION

[0026] The specific contents of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments. Embodiment 1:

[0027] A compression- and tension-resistant tower prestressed concrete pile comprises an end plate, main reinforcement and a pile body. The main reinforcement is arranged evenly vertically inside the pile body. The end surface of the end plate is provided with a plurality of longitudinally penetrating locking holes for connecting the main reinforcement. The end plate is located at the top and bottom of the pile body.

[0028] The pile body is integrally formed, and includes: a first sunken end 1, a second sunken end 2, and a pile section 3. The first sunken end 1 is located at one end of the pile body, and has a uniform shape from top to bottom. The second sunken end 2 is located at the other end of the pile body, and includes a cone 301 and a uniform shape portion. There are multiple pile sections 3, which are located between the first sunken end 1 and the second sunken end 2, and include a cone 301 and a uniform shape portion 302. The bottom of the cone 301 has the same cross-sectional shape as the uniform shape portion 302, and the cone 301 shrinks linearly upward. The non-fitting portion between the bottom of the uniform shape portion 302 and the top of the next pile section 3 is the main bearing surface 303; the height of the uniform shape portion 302 is smaller than the height of the uniform shape portion of the second sunken end 2.

[0029] like Figure 1As shown, the main structures of the first sinking end 1, the second sinking end 2 and the pile segment 3 are square piles, the cross-sectional shape of the first sinking end 1 is square, the cone 301 of the pile segment 3 includes four inclined surfaces, and the uniform portion 302 of the pile segment 3 and the uniform shape portion of the second sinking end 2 are square.

[0030] In practical applications, the corners of the first sinking end 1, the second sinking end 2, and the pile segment body 3 are rounded or chamfered. Embodiment 2:

[0031] like Figure 4 As shown, other parts are the same as those in the first embodiment, except that the first sinking end 1, the second sinking end 2, and the pile segment 3 main structure are round piles, the cross-sectional shape of the first sinking end 1 is round, the conical portion 301 of the pile segment 3 includes a conical surface, and the uniform portion 302 of the pile segment 3 and the uniformly shaped portion of the second sinking end 2 are round. Embodiment three:

[0032] like Figure 5 As shown, other parts are the same as those in the first embodiment, except that the main structures of the first sinking end 1, the second sinking end 2 and the pile segment 3 are special-shaped piles, such as polygonal piles or other shapes, the cross-sectional shape of the first sinking end 1 is polygonal, the conical portion 301 of the pile segment 3 includes eight inclined surfaces, and the uniform portion 302 of the pile segment 3 and the uniformly shaped portion of the second sinking end 2 are polygonal.

[0033] like Figure 2 , 3 As shown, for the above three types of piles, the pile body structures can be solid, hollow, or semi-hollow.

[0034] In practical applications, the first sinking end 1, the uniformly shaped portion of the second sinking end 2, and the uniform portion 302 of the pile section 3 have completely the same cross-sectional shape and size.

[0035] A method for processing a compression-resistant and tension-resistant tower type prestressed concrete pile adopts a casting method or a centrifugal method and is formed by a mold; when the pile body structure is hollow or semi-hollow, a core mold structure is adopted.

[0036] Working principle of the present invention:

[0037] The compression and tension resistant tower prestressed concrete pile of the present invention can be round, square, or special-shaped, such as octagonal, and adopt a pagoda structure. The multiple pile sections 3 between the first sinking end 1 and the second sinking end 2 can contain squeezed soil, and the soil generates resistance to the cone 301 and the main bearing surface 303. The vertical resistance F of the main bearing surface 303 is 主 = p·S 主 ; The surface resistance of the cone 301, taking a circle as an example, if the upper base diameter is d, the lower base diameter is D, and the length is L, the resistance F 圆=p·s·(Dd) / 2L; the surface resistance of the cone 301, taking a square and a polygon as an example, if the inclination angle of the cone 301 is a, the number of faces is N, the resistance F 圆 =FN 拉拔 ·cosa·N. The difference between the present invention and the traditional concrete pile is that the compression and pull-out resistance not only rely on the friction of the pile body, but also rely on the vertical resistance of the main bearing surface 303 and the cone 301. When the building has higher requirements for the compression resistance, the second sinking end 2 is driven downward, and the main bearing surface 303 of each pile section 3 is located at the bottom; when the building has higher requirements for the pull-out resistance, the first sinking end 1 is driven downward, and the main bearing surface 303 of each pile section 3 is located at the top.

[0038] In summary, the present invention can significantly improve the compressive performance or compression resistance of the pile body, thereby improving the safety of the building or reducing the number of foundation piles used.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. The front, back, left and right used in the text are not specific, and are mainly used to more intuitively illustrate the technical solution, and do not play a limiting role. Technical personnel in this industry should understand that the above implementation methods are only for illustrating the technical concept and characteristics of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and cannot be used to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A compression- and tension-resistant tower prestressed concrete pile, comprising: End plate, main reinforcement, pile body, multiple main reinforcements are located inside the pile body and are evenly arranged vertically; multiple locking reinforcement holes for connecting the main reinforcements are opened on the end surface of the end plate, and the end plate is located at the top and bottom of the pile body. The pile body is integrally formed and is characterized by comprising: A first sunken end (1), the first sunken end (1) is located at one end of the pile body and has a uniform shape from top to bottom, A second sunken end (2), the second sunken end (2) is located at the other end of the pile body, and comprises a cone portion (301) and a uniformly shaped portion, A pile section (3), wherein the pile section (3) has a plurality of sections and is located between the first sinking end (1) and the second sinking end (2), and comprises a cone section (301) and a uniform section (302); the bottom of the cone section (301) has the same cross-sectional shape as the uniform section (302); the cone section (301) decreases linearly upward; the non-fitting portion between the bottom of the uniform section (302) and the top of the next pile section (3) is the main bearing surface (303); the height of the uniform section (302) is smaller than the height of the uniform section of the second sinking end (2); The pile structure is one of the following: solid, hollow, or semi-hollow; The first sinking end (1), the uniformly shaped portion of the second sinking end (2), and the uniform portion (302) of the pile section (3) have completely the same cross-sectional shape and size; The main structures of the first sinking end (1), the second sinking end (2) and the pile section (3) are one of the following structures: A. A square pile, wherein the cross-sectional shape of the first sinking end (1) is a square, the conical portion (301) of the pile section (3) includes four inclined surfaces, and the uniform portion (302) of the pile section (3) and the uniform shape portion of the second sinking end (2) are square; B. A round pile, wherein the cross-sectional shape of the first sinking end (1) is circular, the conical portion (301) of the pile segment (3) includes a conical surface, and the uniform portion (302) of the pile segment (3) and the uniform shape portion of the second sinking end (2) are circular; C. A polygonal pile, wherein the cross-sectional shape of the first sinking end (1) is a polygon, the conical portion (301) of the pile section (3) includes a plurality of inclined surfaces, and the uniform portion (302) of the pile section (3) and the uniformly shaped portion of the second sinking end (2) are polygonal.

2. The compression- and tension-resistant tower type prestressed concrete pile according to claim 1, characterized in that: The corners of the first sunken end (1), the second sunken end (2) and the main structure of the pile section (3) are rounded or chamfered.

3. The method for processing a compression-resistant and tension-resistant tower type prestressed concrete pile according to claim 1, characterized in that: The pile is formed by casting or centrifugal method through a mold; when the pile body structure is hollow or semi-hollow, a core mold structure is used.

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