Construction device and construction method of lock catch type steel pipe pile cofferdam

Abstract

The invention discloses a construction device and a construction method of a lock catch type steel pipe pile cofferdam, The device is a cofferdam ( which is in an axial direction parallel mold ) whichis formed by connecting a plurality of locking notch steel pipe piles in parallel, C-shaped female locking notches and T-shaped profile steel are welded to the outer side walls of the two sides of the steel pipe piles along the axis directions of the steel pipe piles correspondingly. According to the device and the method, the structure construction speed is fast, the manufacturing and installingprocess are simple, large mechanical equipment is not needed, and floating facilities are not needed; a male and female joint is adopted by a steel pipe pile joint, so that the number of lock catchesis reduced, and the water leakage probability of the cofferdam is reduced; the water plugging effect can be achieved by simply adopting bentonite processing and the like in the lock catches, the recycling of the steel pipe piles can be ensured, steel is saved, and economy and affordability are achieved.

Description

technical field [0001] The invention relates to a steel pipe pile cofferdam used in deep foundation pit construction, in particular to a steel pipe pile cofferdam locking device on a deep water flowing sand layer. Background technique [0002] In recent years, with the development of the national economy and the continuous acceleration of the pace of transportation infrastructure construction, more and more super-large bridge projects have been built on large rivers and cross-sea bridge projects in coastal areas, and the number of bridges in highway engineering projects has also continued. Increase. [0003] Deep-water foundation construction is the key to the construction of long-span bridges. The construction techniques are complex, and a large number of construction machinery and equipment are invested, which accounts for a huge economic proportion in the entire bridge construction project. The cofferdam is a temporary waterproof structure specially designed for the cons...

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Problems solved by technology

[0004] There are sand mining ships operating on the river all the year round. In addition, the water velocity is too high, and the fluidity of the sand layer is very large. The influence of the flowing sand layer in the deep water area has brought construction difficulties to the stability of the lock steel pipe pile cofferdam, and its construction is safe. and structural stability to be monitored and studied

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