concrete caisson
2.Through analyzing the structure of open caisson, and according to sinking stress principle, the paper introduced in the open caisson construction process sinking, correcting error, survey control as well as peculiar circumstance processing technical measure, such as in open caisson construction the inner-mold for sanding, framework supporting and steel binding, and concrete casting; in open caisson sinking-control the sand in edge foot inner-mold, sand-pumping sinking, and pressure hydraulic monitor breaking and pressure-blowing sinking by air pressure blower etc.
3.The construction scheme is briefly introduced herein, and furthermore, the diversion structures, the composite scheme consisting of open caisson group adopted to treat the overburden of the foundation for the Stage 2 longitudinal concrete cofferdam and the diversion method of bottom outlet combined with the dam gap used for the Stage 2 diversion are described as well.
