Excavation-free construction process and construction device for green city underground structure

Abstract

The invention relates to an excavation-free construction process and a construction device for a green city underground structure. The excavation-free construction device comprises a pile casing, wherein a support is detachably mounted in the pile casing, a spray head set used for washing the bottom wall of an open caisson is arranged on the bottom wall of the support, and a water inlet port of the spray head set is externally connected with a water source; a slurry pumping pipe is arranged on the inner wall of the pile casing, one end of the slurry pumping pipe is located below the water outlet end of the spray head set, and the other end of the slurry pumping pipe is externally connected with a slag collecting pool; and a sand pump is arranged on the slurry pumping pipe, the sand inlet end of the sand pump communicates with the interior of the pile casing, and a plurality of stirring devices are arranged at the bottom of the support. After a constructor mounts the pile casing on the ground, the ground in the pile casing is washed through the spray head set, and thus a soil body and water are mixed to be slurry-water mixture; and after the soil body below the pile casing is loosened, the pile casing sinks under the self-weight effect, then slurry water in the pile casing is pumped into the slag collecting pool through the sand pump, continuous operation is repeated, and thus the pile casing can sink to the elevation. The excavation-free construction process and construction device have the effects that manpower is saved, and the construction efficiency of the open caisson is improved.

Description

technical field [0001] The present application relates to the field of construction technology, in particular to an excavation-free construction technology and construction equipment for green urban underground structures. Background technique [0002] A caisson is a well-shaped structure. It excavates soil in the well and sinks to the design elevation after overcoming the friction of the well wall by its own gravity. Then, it is sealed with concrete and filled in the well hole to make it a bridge pier or other structures. Base. It is generally used in the construction of foundation pits of large bridge piers, sewage pumping stations, large equipment foundations, civil air defense shelters, shield assembly wells, underground lanes and station hydraulic foundation construction enclosures. [0003] The patent with the publication number CN1888329A discloses a construction method of caisson structures. First, the position of the caisson is selected through exploration; a steel...

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Problems solved by technology

[0004] In view of the related technologies mentioned above, there are the following defects: by manually excavating the soil below the caisson to make the caisson sink, the workload of the construction personnel is heavy, and the construction efficiency is low

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