Concrete steel suspension box structure with non-sealed bottom for underwater embedded pile cap

Abstract

The invention discloses a concrete steel suspension box structure with a non-sealed bottom for an underwater embedded pile cap. The concrete steel suspension box structure with the non-sealed bottom for the underwater embedded pile cap is characterized in that the concrete steel suspension box structure comprises a suspension box bottom plate, a plurality of protective cylinders penetrating through the suspension box bottom plate, side walls and a skirt mud guard; the suspension box bottom plate comprises a plurality of reinforced concrete plates which can be assembled together and a pluralityof mud suction holes penetrating through the reinforced concrete plates, and the suspension box bottom plate is further provided with mud suction devices corresponding to the mud suction holes; the side walls are arranged on the suspension box bottom plate and located on the periphery of the suspension box bottom plate; and the skirt mud guard surrounds the suspension box bottom plate and locatedbelow the suspension box bottom plate. According to the concrete steel suspension box structure with the non-sealed bottom for the underwater embedded pile cap, the side walls prevent sludge from entering the suspension box bottom plate, the mud suction devices and the mud suction holes distributed on the reinforced concrete plates cooperate to suck mud to make the suspension box bottom plate tosink, the skirt mud guard prevents sludge from entering the space inside the skirt mud guard, and thus a conventional construction method that steel suspension box cofferdams can only be applied to high pile caps is broken through.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a bottomless concrete steel suspension box structure applied to an underwater buried cap. Background technique [0002] At present, in the construction of bridges and wharf foundations in water, the waterproof cofferdams generally include: steel sheet pile cofferdam, locking steel pipe pile cofferdam, double-wall steel cofferdam, bottomless steel box and bottom steel hanging box cofferdam and other forms. Among them, double-wall steel cofferdams, locking steel pipe pile cofferdams and steel sheet pile cofferdams have been widely used in the construction of underwater buried cap foundations. [0003] However, when the riverbed (flow plastic) muddy overburden layer at the foundation position is super thick (up to tens of meters), the top surface of the designed cap foundation is buried deep in the (flow plastic) mud layer, and there is still a thick layer below the botto...

AI Technical Summary

Problems solved by technology

[0003] However, when the riverbed (flow plastic) muddy overburden layer at the foundation position is super thick (up to tens of meters), the top surface of the designed cap foundation is buried deep in the (flow plastic) mud layer, and there is still a thick layer below the bottom surface. In the muddy soil layer, according to the construction methods such as double-wall steel cofferdam, locking steel pipe pile cofferdam and steel sheet pile cofferdam adopted by conventional low pile caps, the anti-uplift stability check calculation of the pit bottom cannot meet the specification requirements, and the cofferdam The weir needs to pass through the (flow plastic) silt layer and silty soil layer to reach the bearing layer, with a depth of tens of meters. The construction is extremely difficult, the safety risk is great, and the amount of steel is large, which is extremely uneconomical

Images