Variable section shaft underground continuous wall foundation and construction method thereof

Abstract

The invention provides a variable section shaft underground continuous wall foundation and a construction method thereof. The variable section shaft underground continuous wall foundation comprises an upper closed section wall structure and a lower opened section plate pile structure which are integrated. The variable section shaft underground continuous wall foundation has the advantages of a lot of used shaft and multi-walled underground continuous wall bridge foundations, the upper portion of the foundation adopts a structure form as same as that of a shaft underground continuous wall, the lower portion of the foundation adopts a double-wall plate pile structure as same as that of a multi-walled foundation, and the upper portion and the lower portion of the foundation are integrated. The variable section shaft underground continuous wall foundation has good vertical and horizontal bearing performance, construction processes and engineering quantity are greatly reduced, and construction difficulty and construction cost can be obviously reduced.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a variable-section shaft-type underground diaphragm wall foundation and a construction method thereof. Background technique [0002] In recent years, the underground diaphragm wall, as a "three-in-one" basic structure integrating soil retaining, load-bearing and waterproofing, has been widely used in construction engineering, bridge engineering and railway engineering. It is worth noting that due to the rapid construction by mechanization, the variable-section shaft-type underground diaphragm wall foundation has the characteristics of high work efficiency, low cost, wide application range of foundation, low noise, etc., and the characteristics of strong rigidity and good adhesion to the foundation also make it It is especially suitable for long-span bridge foundations. [0003] At present, as far as foreign countries are concerned, engineering examples of underground diaphr...

AI Technical Summary

Problems solved by technology

According to statistics, under the same amount of concrete, its construction cost and construction cost are about 10% to 15% higher than that of ordinary pile foundations, so this has also become an important reason for limiting the application of underground diaphragm wall bridge foundations.

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