Prestressed pile rock anchor rod composite foundation

Abstract

The utility model relates to the technical field of assembly type foundations, in particular to a pre-stressed pile rock anchor rod composite foundation which comprises a base, a main column is arranged on the upper portion of the base, a plurality of pre-stressed piles are arranged below the base, each pre-stressed pile comprises a plurality of prefabricated units which are coaxially arranged, and each prefabricated unit comprises a first body. A first round hole is formed in the first plate body, an anchor rod is arranged in the first round hole, and the end of the anchor rod is fixedly connected with the base. Precast piles are driven on the lower layer to meet the up-pulling working condition, an assembly type foundation is used on the upper layer, cost is reduced on the basis that the down-pressing working condition is met, and pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled foundations, in particular to a prestressed pile rock anchor composite foundation. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] The foundation is an important component of the transmission line. Ensuring its construction safety, reducing construction costs, shortening construction period and increasing its economy are the inevitable trends in the development of transmission lines. Considering many factors such as economy, safety, environmental protection and water conservation, and construction period, it is of great significance to select the appropriate foundation type under different conditions.

[0004] The spiral anchor foundation is a widely used foundation type and has been widely used in the cable-stayed foundation of overseas projects. During construction, the spiral anchor is twisted into the deep soil by applying torque through the anchor rod. There is no need to excavate the foundation pit on a large scale, and the disturbance to the soil is small. The inherent strength of the original soil can be fully utilized to improve the bearing capacity. In soft soil and river network swamp areas, the spiral anchor foundation can give full play to its advantages and have obvious economic benefits.

[0005] The foundation force of a large-span or large-angle tower is significantly greater than that of a conventional tower foundation. When the foundation is located in a river network swamp area, a multi-pile cap foundation is generally used. In order to meet the bearing capacity requirements, the pile diameter, pile length or number of piles is generally increased. Regardless of which method is used, the amount of concrete used for piles and caps will increase significantly. Generally speaking, the amount of concrete used for a single foundation of a large-span transmission tower can reach more than 1,000 cubic meters. Here it is assumed that the geological conditions of the tower location are good, the soil layer below is stable rock, the soil layer is thin, the piles can be supported on the rock foundation, the downward bearing capacity is easy to meet, and the upward bearing capacity is difficult to meet. Utility Model Content

[0006] The utility model provides a prestressed pile rock anchor composite foundation.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A prestressed pile rock anchor composite foundation comprises a base, a main column is arranged on the upper part of the base, a plurality of prestressed piles are arranged below the base, the prestressed piles comprise a plurality of coaxially arranged prefabricated units, each prefabricated unit comprises a main body, a circular hole is arranged on the main body, an anchor is arranged in the circular hole, and the end of the anchor is fixedly connected to the base.

[0009] Furthermore, connecting steel bars are provided in the main body.

[0010] Furthermore, the length of the connecting steel bar is not greater than the length of the main body.

[0011] Furthermore, each prestressed pile consists of four precast units.

[0012] Furthermore, the diameter of the circular hole 1 is larger than the outer diameter of the anchor rod, and the difference between the diameter of the circular hole 1 and the outer diameter of the anchor rod is no more than 100 mm.

[0013] Furthermore, the circular holes are distributed in a rectangular shape on the main body.

[0014] Furthermore, the circular holes 2 are distributed in a circular shape on the main body 2.

[0015] Furthermore, the length of the anchor rod is not less than the length of the prestressed pile.

[0016] Furthermore, the structure of the joint of the spiral anchor is consistent with the structure of the connecting steel plate.

[0017] Beneficial effects: The utility model meets the upward pulling condition by driving prefabricated piles in the lower layer, and uses a prefabricated foundation in the upper layer, which reduces costs and pollution while meeting the downward pressing condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection of the prestressed piles of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the prefabricated unit of the utility model;

[0021] Figure 4 It is a cross-sectional view of the prestressed pile of the utility model.

[0022] In the figure, 1 is the main column, 2 is the base, 3 is the prestressed pile, 4 is the anchor rod, and 5 is the connecting steel bar;

[0023] 301 prefabricated unit, 30101 main body one, 30102 round hole one. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] The embodiments of the utility model are suitable for areas with poor geological conditions, small foundation bearing capacity characteristic values ​​or low soil strength, stratified land with small upper foundation bearing capacity characteristic values ​​and high lower foundation bearing capacity characteristic values.

[0027] Reference Figure 1-4 As shown, the utility model is a prestressed pile rock anchor composite foundation, including a base 2, a main column 1 is arranged on the upper part of the base 2, and the base and the main column are both concrete structures, providing downward pressure bearing capacity and partial upward pull bearing capacity. A plurality of prestressed piles 3 are arranged below the base 2, and the prestressed piles 3 include a plurality of coaxially arranged prefabricated units 301, each prefabricated unit 301 includes a body 30101, a circular hole 30102 is arranged on the body 30101, and an anchor rod 4 is arranged in the circular hole 30102, and the end of the anchor rod 4 is fixedly connected to the base 2. A connecting steel bar 5 is arranged in the body 30101. The length of the connecting steel bar 5 is not greater than the length of the body 30101. Each prestressed pile 3 is composed of four prefabricated units 301. The diameter of the circular hole 30102 is greater than the outer diameter of the anchor rod 4, and the difference between the diameter of the circular hole 30102 and the outer diameter of the anchor rod 4 is not greater than 100 mm. The circular holes 1 30102 are distributed in a rectangular shape on the main body 1 30101. The circular holes 2 are distributed in a circular shape on the main body 2. The length of the anchor rod 4 is not less than the length of the prestressed pile 3.

[0028] When the prestressed piles 3 are in use, a plurality of prestressed piles 3 are arranged in the lower layer of the base 2, each prestressed pile 3 includes a plurality of prefabricated units 301, preferably four, and the prefabricated units 301 of each prestressed pile 3 are connected by four anchor rods 4 arranged in a circular hole 30102, thereby meeting the pulling-up working condition.

[0029] Prefabricated piles are driven into the lower layer to meet the upward pulling conditions, and prefabricated foundations are used in the upper layer to reduce costs and pollution while meeting the downward pressing conditions.

[0030] The prestressed piles in the embodiment of the utility model are connected by 4 prefabricated units, prestressed and connected with anchor rods. The prefabricated piles are made in the factory, which reduces the impact of on-site construction on the environment, reduces carbon dioxide emissions and pollutant generation. Prefabricated piles can be produced in a controlled environment, and the material quality and process control are more reliable, which improves the quality and durability of the product. Fast construction speed: After the prefabricated piles are prefabricated in the factory, on-site construction is simple and fast, which can greatly shorten the construction period and improve the progress of the project. Cost saving: Although the cost of the prefabricated piles themselves may be high, the cost of the overall project can be reduced by improving project efficiency and quality. Good safety: Prefabricated piles reduce dangerous factors during on-site construction, can improve the safety of the construction site, and reduce the possibility of accidents.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A prestressed pile rock anchor composite foundation, characterized by: The invention comprises a base (2), wherein a main column (1) is arranged on the upper part of the base (2), and a plurality of prestressed piles (3) are arranged below the base (2), wherein the prestressed piles (3) comprise a plurality of coaxially arranged prefabricated units (301), wherein each prefabricated unit (301) comprises a main body (30101), wherein a circular hole (30102) is arranged on the main body (30101), wherein an anchor rod (4) is arranged in the circular hole (30102), and the end of the anchor rod (4) is fixedly connected to the base (2).

2. The prestressed pile rock anchor composite foundation according to claim 1, characterized in that: The main body (30101) is provided with connecting steel bars (5).

3. The prestressed pile rock anchor composite foundation according to claim 2, characterized in that: The length of the connecting steel bar (5) is not greater than the length of the main body (30101).

4. The prestressed pile rock anchor composite foundation according to claim 1, characterized in that: Each prestressed pile (3) is composed of four prefabricated units (301).

5. The prestressed pile rock anchor composite foundation according to claim 1, characterized in that: The diameter of the circular hole one (30102) is greater than the outer diameter of the anchor rod (4), and the difference between the diameter of the circular hole one (30102) and the outer diameter of the anchor rod (4) is no greater than 100 mm.

6. The prestressed pile rock anchor composite foundation according to claim 5, characterized in that: The circular holes 1 (30102) are distributed in a rectangular shape on the main body 1 (30101).

7. The prestressed pile rock anchor composite foundation according to claim 1, characterized in that: The length of the anchor rod (4) is not less than the length of the prestressed pile (3).

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