OC-type fore-shaft steel pipe pile structure, steel pipe pile cofferdam and self-compaction water stop method

Abstract

The invention discloses an OC-type fore-shaft steel pipe pile structure, a steel pipe pile cofferdam and a self-compaction water stop method. The steel pipe pile structure comprises large-diameter steel pipes, C-shaped small-diameter steel pipes and O-shaped small-diameter steel pipes, wherein each C-shaped small-diameter steel pipe and the corresponding O-shaped small-diameter steel pipe are coaxial with the corresponding large-diameter steel pipe and are arranged on the outer circumference of the large-diameter steel pipe in a spaced mode. Each C-shaped small-diameter steel pipe is providedwith a notch in the axial direction, each O-shaped small-diameter steel pipe is provided with a rabbet, and each O-shaped small-diameter steel pipe is used for being embedded into the corresponding C-shaped small-diameter steel pipe on another adjacent large-diameter steel pipe. The steel pipe pile structure is simple and good in water stop effect.

Description

technical field [0001] The invention relates to the technical field of deep foundation pit construction for bridge foundations, in particular to an OC-type locking steel pipe pile structure, a steel pipe pile cofferdam and a self-compacting water-stopping method. Background technique [0002] The commonly used water-stopping method for OC-type locking steel pipe piles is: filling the gap between the female end and the male end of the locking steel pipe with a mixture of clay and sawdust or clay and sand to achieve the water-stopping effect. However, in the environment where the water is deep and the water flow rate is fast, it is difficult to fill it densely, and the water-stop effect is not good. In addition, due to the quality problem of locking steel pipe piles, the locking gaps between adjacent steel pipes are different. The mixing and fluidity of this water-stopping material are very poor, making the water-stopping effect even worse. Ideal, it brings many safety hazard...

AI Technical Summary

Problems solved by technology

However, in the environment where the water is deep and the water flow rate is fast, it is difficult to fill densely and the water-stop effect is not good.

In addition, due to the quality problem of locking steel pipe piles, the locking gaps between adjacent steel pipes are different. The mixing and fluidity of this water-stopping material are very poor, making the water-stopping effect even worse. Ideal, bringing many safety hazards to the construction site

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