Prestressed concrete pipe pile of heliostat

Abstract

The utility model provides a heliostat prestressed concrete pipe pile which comprises a stand column (comprising a column body on the upper portion and a pile body on the lower portion), at least the pile body is of a hollow structure, and a filling cavity during construction is formed. A filling channel for concrete to enter the filling cavity when the pipe pile is mounted is reserved on the pile body; the filling channels refer to a plurality of communicating holes which are formed in the side wall of the pile body and communicate with the filling cavity and filling openings which are formed in the bottom end of the pile body and communicate with the filling cavity; the two-part filling channel enables concrete poured during construction to enter the pile body through the two-part filling channel, so that the concrete inside and outside the pile body forms a whole, the combination degree of the pipe pile and a concrete foundation is effectively improved, the overall stability of the pipe pile is improved, and the service life of the pipe pile is prolonged. And meanwhile, the heliostat pipe pile can be prevented from integrally displacing and twisting under the action of wind load.

Description

Technical Field

[0001] This utility model relates to the field of solar power generation technology, specifically to a design for a heliostat prestressed concrete pipe pile. Background Technology

[0002] With the rapid development of my country's solar thermal industry, tower-type concentrating solar collector technology, with its high thermal efficiency and good grid peak-shaving capability, is gaining increasingly widespread market application while possessing clean and green attributes, as well as a wide range of active and reactive power regulation and inertia support capabilities. Heliostats are the main components of tower-type concentrating solar collector systems. Heliostats need to be supported and fixed by columns. The concentrating function of the heliostat body is very sensitive to the deformation of the column, so the column is required to have minimal relative deformation under wind load, which requires a firm connection between the column and the foundation.

[0003] In my country's engineering practice, the columns used have gradually changed from a combination of underground cast-in-place piles and above-ground steel pipe piles to an integrated column-pile system of above-ground columns and underground piles. The main materials are steel pipes or prestressed concrete pipes. For medium and large heliostats, prestressed concrete pipes have a greater cost advantage. At present, in the integrated installation scheme of prestressed concrete pipe piles for heliostats, most of them use cast-in-place concrete outside the pipe piles for column fixation, and rarely pour concrete inside the pipe piles. The underground piles are basically empty, which leads to two problems: (1) Since the outer surface of the concrete pipe piles is relatively smooth, it is difficult to bond tightly with the cast-in-place concrete outside the pipe piles, thus affecting the bonding between the pipe piles and the foundation. The pipe piles are prone to overall displacement and torsion due to the wind load of the external environment. (2) Since the underground piles are empty, their self-weight is not as good as that of the piles after the concrete is poured inside, resulting in poor stability for the heliostats. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned above and to provide a heliostat prestressed concrete pipe pile.

[0005] The present invention adopts the following technical solution to achieve its utility model objective: a heliostat prestressed concrete pipe pile, including a column, wherein the column includes an upper column body and a lower pile body, at least the pile body part is a hollow structure, and the hollow structure is a filling cavity;

[0006] A filling channel communicating with the filling cavity is reserved on the pile body. The filling channel includes multiple communicating holes on the side wall of the pile body communicating with the filling cavity and a filling opening at the bottom end of the pile body communicating with the filling cavity.

[0007] Furthermore, the column is a precast prestressed concrete pipe, and prestressed longitudinal reinforcing bars and circumferential reinforcing bars are constructed inside the pipe wall.

[0008] Furthermore, there are multiple sets of connecting holes, each set of connecting holes is evenly arranged in a circle on the same horizontal plane of the pile body, and the multiple sets of connecting holes are set at equal intervals along the length of the pile body.

[0009] Furthermore, the number of the connecting holes in each group is 6-8 in the same horizontal plane along the length of the pile body; the diameter of the connecting holes is 45mm.

[0010] Furthermore, the prestressed concrete pipe pile also includes a concrete cap constructed outside the column and located at the connection between the column and the pile, with the column perpendicular to the concrete cap and located at the center of the concrete cap.

[0011] Furthermore, the concrete foundation has a length and width of 1000mm and a thickness of 300-400mm.

[0012] By adopting the above technical solutions, this utility model solves the problems mentioned above. The prestressed concrete pipe pile of this utility model adopts an integrated prestressed concrete pile column method with above-ground column and underground pile. A filling channel is reserved on the underground pile for concrete to enter the filling cavity of the pile when the pipe pile is installed. During construction, the poured concrete can enter the interior of the pile through the filling channel, so that the concrete inside and outside the pile is integrated, which improves the bonding between the pipe pile and the foundation, increases the overall stability of the pipe pile, and at the same time prevents the heliostat pipe pile from undergoing overall displacement and torsion under wind load. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of the structure and installation of the prestressed concrete pipe pile described in this utility model.

[0014] Appendix Figure 2 This is a cross-sectional schematic diagram of the position of the connecting hole 2 after the prestressed concrete pipe pile is installed, as described in this utility model.

[0015] The annotations for the attached figures are shown in the table below:

[0016] Mark numbers Tag name Mark numbers Tag Name 1 Column 1 3 Filling cavity 3 11 Column 11 4 Pre-drilled hole 4 12 Pile body 12 5 Concrete foundation 5 2 Connecting hole 2 6 Fill opening 6 Detailed Implementation

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The content of the utility model will be further described below in conjunction with the drawings:

[0018] Example 1

[0019] Refer to the instruction manual appendix Figure 1 , 2 A heliostat prestressed concrete pipe pile includes a column 1, which comprises an upper column body 11 and a lower pile body 12. The lower pile body 12 is underground during installation, while the upper column body 11 is above ground during installation. Both the column body 11 and the pile body 12 are hollow structures, which serve as filling cavities 3 during construction. These filling cavities 3 are used to fill concrete materials to enhance the rigidity and stability of the column 1 and prevent deformation.

[0020] A filling channel communicating with the filling cavity 3 is reserved on the pile body 12. The filling channel includes a plurality of connecting holes 2 on the side wall of the pile body 12 communicating with the filling cavity 3 and a filling opening 6 at the bottom end of the pile body 12 communicating with the filling cavity 3. The connecting holes 2 and the filling opening 6 allow cast-in-place concrete material from the outside of the pile body 12 to enter the inside of the pile body 12 and fill the connecting holes 2 themselves, so as to achieve a good bond between the pile body 12 and the concrete inside and outside. The concrete material entering the connecting holes 2 further strengthens the bond with the pile body 12.

[0021] Specifically, the column 1 is a prestressed concrete pipe. Prestressed longitudinal reinforcing bars and circumferential reinforcing bars are constructed inside the pipe wall to strengthen the pipe wall. The prestressed concrete pipe must be prefabricated in the factory and then transported directly to the installation site for foundation drilling, hoisting of the prestressed concrete pipe, and concrete pouring and installation, which is highly efficient.

[0022] In one implementation, refer to the appendix. Figure 1 , 2 The connecting holes 2 are in multiple sets, and each set of connecting holes 2 is evenly arranged in a circle on the same horizontal plane of the pile body 12. The multiple sets of connecting holes 2 are set at equal intervals along the length of the pile body 12. Specifically, the distance between the multiple sets of connecting holes 2 is 400mm. Each set of connecting holes 2 has 6-8 holes, and the 6-8 connecting holes 2 surround the pile body 12 on the same horizontal plane. When concrete is poured from different directions outside the pile body 12, the concrete can enter the pile body 12 through the closest connecting hole 2. The multiple sets of connecting holes 2 can ensure that the concrete pouring method inside the pile body 12 is from top to bottom. Combined with the concrete pouring method of the filling opening 6, which is from bottom to top, the concrete pouring efficiency inside the pile body 12 is the highest and the effect is the best.

[0023] When using prestressed concrete pipe as column 1, since the pipe wall contains prestressed longitudinal and circumferential reinforcing bars, in order to ensure that the position of the reinforcing bars is not affected when opening the connecting hole 2, the diameter of the connecting hole 2 should be less than or equal to 45mm within the allowable spacing of the prestressed longitudinal and circumferential reinforcing bars. In order to ensure the concrete pouring effect and efficiency in the pile body 12, the diameter of the connecting hole 2 is set to 45mm.

[0024] In one implementation, refer to the appendix. Figure 1 The prestressed concrete pipe pile also includes a concrete platform 5 constructed outside the column 1 and located at the connection between the column 11 and the pile 12. The column 1 is perpendicular to the concrete platform 5 and located at the center of the concrete platform 5. The concrete platform 5 has a length and width of 1000mm and a thickness of 300-400mm. The concrete platform 5 can increase the contact area between the column 1 and the ground, and increase the overall ability of the prestressed concrete pipe pile to resist wind loads. Through the combined action of the column 1, concrete, and concrete platform 5, the prestressed concrete pipe pile can ensure the safety and stability of the equipment even under strong winds.

[0025] See attached document Figure 1 A method for installing heliostat prestressed concrete pipe piles, comprising,

[0026] The first step is to use machinery to construct a pre-dug hole 4 in the soil where the heliostat prestressed concrete pipe pile is to be installed. The pile body 12 at the bottom of the column 1 is vertically inserted into the center of the pre-dug hole 4. The connecting holes 2 are all inside the pre-dug hole 4. Fine stone concrete is used to fill the pre-dug hole 4. Some concrete enters the pile body 12 through the connecting holes 2 and the filling opening 6, which fully fixes the pile body 12.

[0027] The second step is to cure the concrete until it reaches 80% of its design strength, and then remove the construction machinery and other auxiliary equipment.

[0028] The third step is to construct a concrete foundation 5 centered on column 1 at the part where column 1 contacts the ground (where column 11 connects to pile 12) using C20 concrete. Reinforcing steel bars can be placed inside the concrete foundation 5.

[0029] In the above installation method, the diameter of the pre-dug hole 4 is 600-700mm larger than the outer diameter of the column 1, and the hole depth is 300mm greater than the burial depth of the column 1. That is, the distance between the bottom end of the column 1 and the bottom of the pre-dug hole 4 is 300mm. The pile body 12 will be filled and surrounded by fine stone concrete. The fine stone concrete will also automatically enter the interior of the pile body 12 from the connecting hole 2 and the filling opening 6, so as to achieve a good combination between the pile body 12 and its inner and outer concrete, and enhance the rigidity and stability of the column 1.

[0030] After the concrete that enters the pile body 12 through the connecting hole 2 solidifies, the corresponding part of the connecting hole 2 will also be filled with concrete. That is, a concrete column that passes through the pipe wall of the pile body 12 is connected between the concrete inside and outside the pile body 12, so that the concrete inside and outside the pile body 12 is connected into a whole. The concrete column can provide a lateral support for the pile body 12 and enhance the torsional and overturning resistance of the column 1.

[0031] It is obvious that modifications and / or additions can be made to the above-mentioned heliostat prestressed concrete pipe pile and corresponding methods without departing from the scope and domain of this utility model.

[0032] It is equally clear that, although this utility model has described the heliostat prestressed concrete pipe pile in detail, those skilled in the art will certainly be able to obtain many other equivalent forms of heliostat prestressed concrete pipe piles and corresponding methods, which have the features described in the claims and are therefore within the scope of protection defined herein.

Claims

1. A heliostat prestressed concrete pipe pile, characterized in that: Includes a column (1), the column (1) includes an upper column body (11) and a lower pile body (12), at least the pile body (12) is a hollow structure, the hollow structure is a filling cavity (3); A filling channel communicating with the filling cavity (3) is reserved on the pile body (12). The filling channel includes a plurality of communicating holes (2) communicating with the filling cavity (3) provided on the side wall of the pile body (12) and a filling opening (6) communicating with the filling cavity (3) provided at the bottom end of the pile body (12).

2. The heliostat prestressed concrete pipe pile according to claim 1, characterized in that: The column (1) is a prestressed concrete pipe, and prestressed longitudinal reinforcing bars and circumferential reinforcing bars are constructed inside the prestressed concrete pipe wall.

3. The heliostat prestressed concrete pipe pile according to claim 1, characterized in that: There are multiple sets of the connecting holes (2), and each set of the connecting holes (2) is evenly arranged in a circle on the same horizontal plane of the pile body (12). The multiple sets of the connecting holes (2) are set at equal distances along the length direction of the pile body (12).

4. The heliostat prestressed concrete pipe pile according to claim 3, characterized in that: The number of connecting holes (2) in each group in the same horizontal plane along the length of the pile body (12) is 6-8.

5. The heliostat prestressed concrete pipe pile according to claim 1, characterized in that: The diameter of the connecting hole (2) is 45 mm.

6. The heliostat prestressed concrete pipe pile according to claim 1, characterized in that: The prestressed concrete pipe pile also includes a concrete cap (5) constructed outside the column (1) and located at the connection between the column (11) and the pile (12), with the column (1) perpendicular to the concrete cap (5) and located at the center of the concrete cap (5).

7. The heliostat prestressed concrete pipe pile according to claim 6, characterized in that: The concrete foundation (5) has a length and width of 1000mm and a thickness of 300-400mm.

Images