Pressure-bearing type uplift pile and precast pile connecting structure and construction method thereof

Abstract

The invention provides a pressure-bearing type uplift pile precast pile connecting structure and a construction method thereof. A plurality of sections of concrete pile bodies support a bearing platform, a pressure-bearing surface is arranged at a second section of a concrete pile body butted with a first section of concrete pile body connected with the bearing platform, the pressure-bearing surface is provided with a plurality of threaded sleeves, and the threaded sleeves are connected with the interior of the bearing platform through connecting ribs. The pressure-bearing surface is located on an anchoring plate, in butt joint with the first concrete pile body, of the second concrete pile body. The stress state of the connecting position of the precast pile is completely changed, tension is changed into compression, the pressure-bearing type uplift pile precast pile connecting structure has the advantages of being simple in structure, high in uplift bearing capacity, low in manufacturing cost and high in construction efficiency, and the situation that a connector is pulled and damaged due to insufficient construction quality of the connector is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a prefabricated pile connection structure of a pressure-bearing uplift pile and a construction method thereof. Background technique [0002] At present, the amount of concrete prefabricated piles used in industrial and civil buildings, railways, highways, municipal and other fields is increasing, and the prefabricated piles used for pile foundation anti-uplift account for more than 20%. , it is necessary to focus on the connection between piles and piles, and the connection between pile tops and caps. The connection methods currently used for the connection between piles and piles mainly include end plate welding or mechanical connection. Whether welding or mechanical connection is used, the connection All the forces are under tension, which leads to very high requirements for the construction of the joints. The welding connection method is greatly affected by th...

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Problems solved by technology

[0002] At present, the amount of concrete prefabricated piles used in industrial and civil buildings, railways, highways, municipal and other fields is increasing, and the prefabricated piles used for pile foundation anti-uplift account for more than 20%. , it is necessary to focus on the connection between piles and piles, and the connection between pile tops and caps. The connection methods currently used for the connection between piles and piles mainly include end plate welding or mechanical connection. Whether welding or mechanical connection is used, the connection All the forces are under tension, which leads to very high requirements for the construction of the joints. The welding connection method is greatly affected by the weather and the difference in the level of the pile foundation construction personnel on site. At the same time, the technical level of the construction personnel is high. As a result, there is a large difference in the quality of welding between piles and piles, and the quality of welding is difficult to control, which may easily lead to potential safety hazards in the connection structure at the pile head of the prefabricated pile

[0003] Since the quality of welding directly affects the use of concrete components, this will cause safety hazards to the project

On the other hand, this welding method takes a long time, especially for concrete members with large diameters (more than 800mm in diameter) or large side lengths (more than 500mm in side length), the welding construction time between pile heads and pile heads exceeds 30 minutes, and at the same time It also takes about 8-10 minutes of cooling time, which affects the progress of the project, increases the workload of the construction personnel, and affects the construction efficiency

The use of mechanical connection joints can make the piles free of welding during on-site installation. It has the advantages of simple structure, high pull-out bearing capacity, low cost, and high construction efficiency, but it cannot fundamentally solve the problem that the force of the joints is still tension.

[0004] In actual engineering, the connection between the pile top and the cap is mainly to install the connecting steel bars on the pile top or fill the inner cavity of the hollow prefabricated pile with reinforced concrete core, and then connect the exposed steel bars to the cap. If this connection method is also affected by the weather It is relatively large and has relatively high requirements for construction personnel. Since the quality of the core filling is difficult to guarantee, it often happens that the entire building floats due to the core filling concrete being pulled out, which endangers the safety of the building.

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