Mud sleeve assisted double-wall steel cofferdam sinking construction method

Abstract

The invention discloses a mud sleeve assisted double-wall steel cofferdam sinking construction method. The method comprises the following steps that a, preparing is made before construction, water pipelines and electric pipelines of the double-wall steel cofferdam construction site are connected, the construction site is arranged, machines, tools and equipment are well prepared, the personnel arewell configured, the materials are well prepared, the engineering geology condition and the hydrological geology condition are analyzed and known in detail according to the geological exploration dataand the construction design, the construction organization design is carefully compiled, and a construction monitoring plan is formulated; and b, the double-wall steel cofferdam is manufactured at the rear place, and the double-wall steel cofferdam is machined in a segmented block mode in a shore machining field. The method has the beneficial effects that a mud sleeve is adopted for assisting thesteel cofferdam in sand pumping and sinking, the multiple advantages of being stable in sinking, high in sinking speed, easy to correct and the like are integrated, the construction period is greatlyshortened, the investment of workers, materials and mechanical equipment in construction are reduced, the engineering cost is saved, the sand pumping amount on a riverbed of the river is reduced, then the damage degree on the internal structure of the riverbed is reduced, and the requirement for green construction is met.

Description

technical field [0001] The invention relates to the construction technical field of steel cofferdam sinking in water and floating caisson in water, in particular to a construction method for mud jacket-assisted double-wall steel cofferdam sinking. Background technique [0002] In recent decades, the deep-water foundation construction of highways and railway bridges in my country has adopted double-wall steel cofferdams as temporary water-retaining structures on a large scale. Shen's research is rare. The traditional method is to use an air dredge to symmetrically suck mud in the cofferdam to assist the cofferdam sinking. This method is relatively inefficient and has a long construction period. The 11#~21# pier caps of the Dongjiang Bridge on Huixin Avenue are all in the water. When the double-wall steel cofferdam construction technology is adopted, the outer wall and the sand friction resistance of the double-wall steel cofferdam will be large during the process of lowering ...

AI Technical Summary

Problems solved by technology

The traditional method is to use the air suction dredge to symmetrically suck mud in the cofferdam to assist the cofferdam sinking. This method is relatively inefficient and has a long construction period.

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