Recyclable combined steel structure open caisson and construction method thereof

Abstract

The invention relates to the technical field of steel structure open caissons, in particular to a recoverable combined type steel structure open caisson and a construction method thereof.The recoverable combined type steel structure open caisson comprises four steel corner columns symmetrically arranged in pairs and four well walls, the well walls are installed between every two adjacent steel corner columns, and the four steel corner columns and the four well walls are combined and installed to form the steel structure open caisson; the concept of combined assembly is adopted, steel structure open caisson components are manufactured and machined in a factory and assembled on the ground of a construction site to form a rigid structure, an open caisson sinks in place according to a conventional open caisson construction technology, after non-excavation construction of a pipeline is completed, earthwork is backfilled in the open caisson while connecting pieces of the wall of the steel open caisson are dismantled, and the open caisson is constructed. And finally, the steel member is pulled out on the ground for recycling, so that the minimum influence on the surrounding environment and the minimum risk in the construction process are guaranteed, the enclosure structure and the permanent structure are combined into a whole, the economical efficiency is good, and the quality is high.

Description

technical field [0001] The invention relates to the technical field of steel structure caissons, in particular to a recyclable combined steel structure caisson and a construction method thereof. Background technique [0002] Underground pipelines (sewage pipes, power main pipes, etc.) constructed by non-excavation methods (pipe jacking, pipe pulling, etc.) must have working wells. Traditionally, a reinforced concrete caisson is set every 100m or so along the pipeline, the internal clearance of the reinforced concrete caisson is 3.5m*6.0m (or slightly larger), and the depth of the caisson is basically above 6m. [0003] Reinforced concrete caissons have the following disadvantages: [0004] 1. Cannot be reused. The reinforced concrete caisson only works during the pipeline jacking (temporary working condition). After the pipe jacking construction is completed, the reinforced concrete caisson can only be used as an inspection well (permanent working condition) for personnel ...

AI Technical Summary

Problems solved by technology

The reinforced concrete caisson only works during the pipeline jacking (temporary working condition). After the pipe jacking construction is completed, the reinforced concrete caisson can only be used as an inspection well (permanent working condition) for personnel to maintain the pipeline. It is different from the traditional inspection Compared with wells, temporary caissons used as permanent inspection wells cause a lot of waste of reinforced concrete resources

[0005] 2. The sinking process is difficult to control

Once the reinforced concrete caisson is poured, the weight is basically stable, but the resistance of the sinking process changes, so it is difficult to control the sinking stability

[0006] 3. The cost is high and the construction period is long

Reinforced concrete caissons are generally constructed in layers and sink in stages. After the concrete is poured, it is necessary to wait for the section of the caisson to reach the design strength, resulting in a long construction period for the reinforced concrete caisson, which will affect the road or the surrounding environment for a long time

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