Sludge geological condition self-sinking type precast concrete open caisson tire film structure and construction method

Abstract

The invention discloses a sludge geological condition self-sinking type precast concrete open caisson tire film structure and a construction method, and belongs to the technical field of sludge geological bearing platform construction. The open caisson mold comprises an open caisson mold and a counterweight assembly arranged on the open caisson mold, a flange plate is arranged at the top of the open caisson mold, galvanized iron sheets are arranged on the inner side of the open caisson mold, prefabricated mold blade feet are arranged at the bottom of the open caisson mold, and the counterweight assembly comprises a counterweight frame arranged at the top of the open caisson mold and a group of counterweights arranged in the counterweight frame. The self-gravity open caisson is carried out in the mode that the open caisson is matched with the balance weight, the method is suitable for bearing platform construction in the silt geology, and the construction difficulty can be reduced and the construction period can be shortened on the basis of ensuring the construction quality; by arranging the flange plates on the open caisson, the sinking position of the open caisson can be limited, and the situation that the construction difficulty is increased and the construction progress is affected due to control over the sinking amount is avoided; the galvanized iron sheet is arranged on the inner side of the open caisson, the sinking resistance in the sinking process is reduced, and rapid sinking construction is achieved.

Description

technical field [0001] The invention belongs to the technical field of silt geological cap platform construction, and in particular relates to a self-sinking prefabricated concrete caisson membrane structure and a construction method under silt geological conditions. Background technique [0002] In silt geological construction projects, after excavation of foundation pits such as caps in the basement foundation floor structure, side forms need to be set to meet the construction requirements, and the method of laying brick membranes is generally used. [0003] There are the following problems in the actual construction of this method: problem one, the earthwork backfilling can only be carried out after the wall body produces strength during the construction process, and there is a time interval between the processes, which often results in a long construction period and increases the construction cost; problem two, In the muddy soil, the excavation of the earthwork of the ca...

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Problems solved by technology

[0003] There are the following problems in the actual construction of this method: problem one, the earthwork backfilling can only be carried out after the wall body produces strength in the construction process, and there is a time interval between the processes, which often results in a long construction period and increases the construction cost; problem two, In the muddy soil, the excavation of the earthwork of the cap platform needs to be excavated after the soil is dewatered and dried, and the construction period is longer; the third problem is that when the caisson is constructed, the friction between the caisson and the soil is large, and it cannot sink quickly. Need to continuously increase the pressure to accelerate the sinking, and the construction is cumbersome; problem 4, conventional caissons need to control the sinking amount, especially when the sinking elevation is about to be reached, the sinking speed needs to be slowed down to avoid excessive sinking, and the construction control is difficult

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