Water-stopping positioning structure between steel hanging box cofferdam and pile casing and construction method thereof

By installing inverted L-shaped angle steel and upturned steel plates in the reserved holes in the bottom plate of the steel cofferdam, combined with an annular water-stopping platform and rubber water-stopping belt, the water-stopping and positioning problems between the steel cofferdam and the casing were solved, achieving rapid and reliable sealing and positioning, and improving construction safety and efficiency.

CN117868182BActive Publication Date: 2026-07-21CHANGJIANG SURVEY PLANNING DESIGN & RES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGJIANG SURVEY PLANNING DESIGN & RES CO LTD
Filing Date
2023-12-05
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In the construction of deep-water high-pile foundations, the lack of effective water-stopping facilities between the steel cofferdam and the casing makes the construction of underwater sealing plates difficult, posing risks of leakage and backflow, and the positioning is inaccurate, affecting construction safety and efficiency.

Method used

Inverted L-shaped angle steel and upturned steel plates are installed in the reserved holes in the bottom plate of the steel cofferdam. Combined with the annular water-stop platform and rubber water-stop belt, sealing and positioning are achieved by elastic overlap and pouring epoxy quick-setting concrete.

Benefits of technology

This method achieves rapid and reliable water sealing between the steel cofferdam and the casing, reduces the risk of leakage and backflow, improves construction safety and efficiency, and ensures the stability and positioning accuracy of the cofferdam.

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    Figure CN117868182B_ABST
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Abstract

The application discloses a water-stopping positioning structure between a steel hanging box cofferdam and a pile casing and a construction method thereof, and relates to the technical field of water-stopping positioning structures. The structure comprises a steel hanging box cofferdam, wherein the steel hanging box cofferdam comprises a cofferdam bottom plate and cofferdam side plates arranged around the cofferdam bottom plate; a plurality of reserved holes are formed in the cofferdam bottom plate, and a plurality of inverted L-shaped angle steels are arranged around the inner walls of the reserved holes; a plurality of pile casings are arranged in the reserved holes of the cofferdam bottom plate in a connected mode, an annular water-stopping platform and a head-raising steel plate are arranged on the outer wall of the uppermost pile casing, the head-raising steel plate is arranged above the annular water-stopping platform and is used for elastically lapping the inverted L-shaped angle steels, and a rubber water-stopping belt is arranged between the top end of the annular water-stopping platform and the bottom end of the cofferdam bottom plate for sealing and filling. The application can realize quick water-stopping between the steel hanging box cofferdam and the pile casing, positioning and fixing of the cofferdam bottom plate, and is quick to install, convenient to construct, cost-saving and time-saving.
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