Improved variable-section hollow square pile

Abstract

The invention provides an improved variable-section hollow square pile and belongs to the technical field of construction prefabricated parts. By the adoption of the improved variable-section hollow square pile, the problem that an existing concrete pipe pile is poor in bending resistance and connection strength is solved. The improved variable-section hollow square pile comprises a pile body. Metal end plates are fixedly connected to the two ends of the pile body. A plurality of insertion connection holes are formed in the end plate at one end of the pile body, and a plurality of insertion connection columns are fixedly connected to the end plate at the other end of the pile body. Each insertion connection column comprises a sealing part and a fixing part, and a clamping groove is formed between the fixing part and the sealing part. Two fixing plates are connected in each insertion connection hole. A tensioning part is arranged in each insertion connection hole. An asphalt layer is fixedly connected to the inner wall of each insertion connection hole. When each insertion connection column is inserted into the corresponding insertion connection hole, the asphalt layer abuts against the outer wall of the sealing part. By the adoption of the improved variable-section hollow square pile, the connection strength between two hollow square piles is higher, and the bending resistance is higher.

Description

Technical field [0001] The invention belongs to the technical field of building prefabricated parts, and relates to an improved variable cross-section hollow square pile. Background technique [0002] With the development of reform and opening up and economic construction, pre-tensioned prestressed concrete pipe piles began to be widely used in railway systems, and expanded to industrial and civil construction, municipal administration, metallurgy, ports, highways and other fields, in the Yangtze River Delta and the Pearl River Delta. As the geological conditions are suitable for the characteristics of the use of pipe piles, the demand for pipe piles has soared, thus rapidly forming a new industry. Since pipe piles of different lengths need to be used according to specific conditions in the piling process, two pipe piles need to be connected to each other, so the connection strength between the two pipe piles is particularly important. [0003] For example, a Chinese invention pat...

AI Technical Summary

Problems solved by technology

The two square pile bodies are fixedly connected by plugs and slots. Due to the small length of the plugs, although there are multiple connections, the square pile bodies are all made of concrete, which is huge in weight and easy to There is a bend at the connection, that is, the bending resistance of this connection structure is weak. Furthermore, the square pile body is usually driven into the ground first, and then the other end is butted up. At this time, it is necessary to inject a sealant into the socket. Materials, such as the epoxy resin in the comparison document, seal the plug and the socket through the epoxy resin. However, the epoxy resin needs a certain amount of time to solidify, and the construction process is often directly after the two square pile bodies are docked. At this time, the chlorine salt in the soil is easy to damage the epoxy resin that is not completely solidified, causing the epoxy resin to lose its sealing effect, and eventually the chlorine salt will enter the slot and corrode the plug and other components, resulting in poor connection strength, and further Yes, a spring needs to be set in the slot of the square pile body, and the snap ring is pressed by the spring, so that the snap ring hugs the plug tightly, but the spring is a consumable part, and the elastic force will become weak after long-term use, which will cause the snap ring to The clamping ability of the plug is weakened, which will eventually lead to a weakening of the connection strength between the square pile bodies

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