Construction method of steel plate pile cofferdam

Abstract

The invention discloses a construction method of a steel plate pile cofferdam, which is characterized in that the construction method comprises the following steps: (1) performing construction preparation work; (2) surveying and setting out: surveying and setting out to determine four corner points of the cofferdam according to the design size of the cofferdam and the center position of a support platform, and driving positioning piles at the corner points as control points for positioning the steel plate pile cofferdam; (3) constructing an internal support system constituted by a guide beam, a waling, an inner support, a connecting beam and a supporting beam; (4) firstly welding the waling and the inner support, assembling into a whole, lowering and then inserting and driving steel plate piles for construction; (5) performing mud suction on the cofferdam; (6) sealing the bottom of the cofferdam; (7) performing water pumping and foundation cleaning on the cofferdam; and (8) dismantling the cofferdam.The construction method can further expand the range of applications of the steel plate pile cofferdam by improving the construction sequence and adopting special construction equipment, and successfully realize the steel plate pile cofferdam under the geological condition of a super-thick sandy gravel layer.

Description

technical field [0001] The invention relates to a construction method of a steel sheet pile cofferdam. Background technique [0002] Steel sheet pile cofferdam is a temporary structure for building and bridge foundation construction, but it plays an important role in foundation construction. It provides waterproofing, soil-repelling, and sometimes protection against scours and landslides for foundation construction. Due to the advantages of simple structure, simple construction, short construction period, low cost and easy quality control of steel sheet pile cofferdams, steel sheet pile cofferdams are widely used in silt, clay and muddy soils, and the construction technology is quite mature. However, in the construction of this technology under the geological conditions of ultra-thick sand and pebble layers, there are problems such as the difficulty of inserting steel sheet piles and cofferdam mud suction, and there are also problems such as long construction period and hig...

AI Technical Summary

Problems solved by technology

However, in the construction of this technology under the geological conditions of ultra-thick sand and pebble layers, there are problems such as the insertion of steel sheet piles and the difficulty of sucking mud in the cofferdam, as well as the problems of long construction period and high risk.

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