Prestressed concrete pipe pile internal expansion quick end lengthening device and construction method thereof

Abstract

The invention discloses a prestressed concrete pipe pile internal expansion quick end lengthening device. The device comprises a long screw rod, an opening expansion sleeve, an elastic gasket and a fastening nut; the middle upper section of the long screw rod is a smooth section; the upper end of the smooth section is an expansion end gradually expanding; the lower section of the long screw rod isa thread section; the fastening nut sleeves the thread section; the opening expansion sleeve sleeves the smooth section; a longitudinal breakage opening is formed in the upper pipe wall of the opening expansion sleeve; and the elastic gasket is positioned between the lower end of the opening expansion sleeve and the fastening nut. The device mainly applies an internal expansion bolting principleand a rib lengthening principle, improves the pile body lengthening construction efficiency under the precondition of guaranteeing the lengthening quality, and is not influenced by the rain and snow weathers; and as the device is simple in structure and reliable in connection, and saves implanted steel parts, the single pile lengthening construction cost is reduced. In addition, through a drawingtest on end lengthening test pieces before construction, the quality hidden troubles of inspection lots can be reduced.

Description

technical field [0001] The present invention relates to a prestressed concrete pipe pile extension device, in particular to a prestressed concrete pipe pile inner expansion quick extension end device, and also relates to the construction of the prestressed concrete pipe pile inner expansion quick extension end device method. Background technique [0002] The length of existing prestressed concrete pipe piles generally adopts two connection methods: welding and mechanical connection: such as figure 1 As shown, the welding connection method is to pre-embed the steel plates 3 and 4 at the ends of the upper pile body 1 and the lower pile body 2, and weld between the steel plates 3 and 4. At the same time, the steel pier heads 5 and 6 anchored in the upper and lower pile bodies Engaged in the reserved hole 7 of the connection part of the steel plates 3 and 4. However, because the welding process is affected by downtime and rainy and snowy weather, the pipe pile extension qualit...

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Problems solved by technology

[0005] Although this mechanical connection method improves the construction efficiency compared with the welding connection method, because the joint device increases the amount of steel plates implanted in the pile body, it increases the cost of single pile extension, thereby increasing the difficulty of marketing, and , the length of the end connection lacks the inspection batch measurement technology, and there are also quality hidden dangers

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