Soft foundation treatment method capable of providing pre-pressing load by surcharge load in manner of inserting and piling water draining board to drain and capable of forming steel cylinder water-stop structure

Abstract

The invention discloses a soft foundation treatment method capable of providing pre-pressing load by surcharge load in a manner of inserting and piling a water draining board to drain and capable of forming a steel cylinder water-stop structure. The soft foundation treatment method comprises the following steps of: sinking as steel cylinder and an assistant bin; backfilling the steel cylinder and the assistant bin with sand; closing a soft foundation treatment area, connecting the steel cylinder to the assistant bin to carry out water stop treatment; backfilling the closed area until a construction operation surface, and draining water to a position below the backfilled surface, inserting and piling the plastic water draining board on land; backfilling to pre-pressing height and regulating water-draining water level; carrying out full-load pre-pressing; and unloading after processing requirements are met. The soft foundation treatment method disclosed by the invention can quickly provide a water stop environment to an area which needs soft foundation treatment, and can artificially reduce the construction operation surface, so that the difficulty of inserting and piling the plastic water draining board is reduced, and stability requirements of the structure are favorably met by regulating the water draining water level; and backfilling and heap-loading can be continuously carried out and water draining is combined, so that an overload ratio of providing pre-pressing load is 1.5-3.0; and moreover, stability requirements of the structure are favorably met by water draining, so that the soft foundation treatment method is obviously superior to a conventional foundation treatment mode.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a soft foundation treatment method for forming a steel cylinder cofferdam water-stop structure in a water area. Background technique [0002] The deep-inserted large-diameter steel cylinder structure has the advantages of less excavation, good stability, fast construction period, and excellent environmental protection in the environment of large water depth and thick soft foundation. It has the ability to correct uneven soil layers, especially reliable water-proof and anti-sand leakage Function, using anti-corrosion measures similar to steel pipe piles, can meet the service life requirements of more than 50 years, and has broad application prospects in the construction of breakwaters, revetments, wharfs, artificial islands and other structures. [0003] The conventional soft ground (or foundation) treatment method is to form a drainage consolidation channel by inserting pl...

AI Technical Summary

Problems solved by technology

However, this structure requires additional water-stop treatment around the soft foundation. At the same time, the elevation of the inserted drainage board is often the natural construction water level. For the foundation treatment requirements that require large surcharge preloading, the stability of the structure during the construction period and the difficulty of construction are equal. There are greater difficulties, so that the program still has certain limitations

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