Retaining wall type caisson sinking device and its construction method

Abstract

The invention discloses a retaining wall type open caisson sinking device and a construction method of the retaining wall type open caisson sinking device. The retaining wall type open caisson sinking device comprises a door type support unit, a deviation rectification unit, a sinking-assisting unit and an auxiliary unit. The door type support unit is composed of a device foundation, a door-type support and side supporting frames. The deviation rectification unit comprises an inner retaining wall, an outer retaining wall and slinging chains. The sinking-assisting unit comprises a device layer, an inner air box, an outer air box and longitudinal high-pressure air conveying pipelines. The auxiliary unit is composed of a headstock gear and an electromagnet. The retaining wall type open caisson sinking device further comprises a posture monitoring unit composed of a posture sensor and a controller processor. The construction method of the retaining wall type open caisson sinking device is used for constructing an open caisson with a deep overburden foundation and with the high automation degree, enabling the posture of the open caisson to be monitored in real time and enabling deviation rectification to be conducted on the posture of the open caisson in time. According to the retaining wall type open caisson sinking device and the construction method of the retaining wall type open caisson sinking device, when the open caisson sinks due to the dead load, new measures such as sink assistance, deviation rectification, the electromagnet and the retaining walls are thoroughly combined, it is guaranteed that sinking of sections of the open caisson can be continuously, effectively and accurately conducted on the deep overburden foundation, the automation degree is high, and mutual interference between open caissons is small.

Description

technical field [0001] The invention relates to a wall-protecting caisson sinking device and a construction method thereof, belonging to the field of foundation excavation construction of water conservancy and hydropower projects. Background technique [0002] The caisson is a reinforced concrete structure, mainly composed of a shaft (shaft wall), a partition wall and a blade foot. The caisson is a construction technology that excavates soil in a prefabricated reinforced concrete shaft, and gradually sinks into the ground relying on the self-weight of the shaft to overcome the frictional resistance between the shaft wall and the formation, so as to achieve the engineering goal. [0003] Hydropower construction began to introduce caisson technology in the 1960s, and it has been applied in some large-scale water conservancy and hydropower projects. If the bearing capacity of the material foundation is insufficient and open excavation is not suitable, caissons can also be used...

AI Technical Summary

Problems solved by technology

The main problem is difficulty sinking: no sinking, very slow sinking, or a severe tilt

[0006] (2) The subsidence caisson construction method, that is, the construction method of forcibly pressing the caisson into the foundation with the help of the ground anchor reaction force device, but the premise is that the construction site should have the conditions for setting the ground anchor to provide effective reaction force, so it has certain limitation

The SS caisson construction method is mostly used in the construction of smaller caissons, the application range is small, and there are problems such as difficult correction of the caisson sinking process

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