Lifting Airbag
Lifting Airbag

Caisson Moving Airbag

We have upgraded regular ship launching airbags to engineering airbags with ultra-high pressure.

Caisson moving airbags are designed based on rolling principle, largely used in port construction for cais-son moving. Using airbags as tools for caisson moving, it can avoid the track construction and mainte-nance and other complex process come from caisson moving by the hydraulic jacks.
Caisson Moving AirbagCaisson Moving Airbag
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With the help of this new type of caisson moving airbags, we successfully moved a well-known ancient sunken ship of the Song Dynasty named "NanHai No. 1" for 400 meters intact horizontally from the beach to its permanent exhibition site within only two days in 2007, a sensational achievement that stunned the world at the time. Since then, caisson moving airbags has become the mainstream method in China and accounting for over 70% market share.

Diameter: Dia1 .0m airbags are the commonly used for caisson moving, and for the smaller sized caissons, Dia 0.8m airbags are ideal one.
Effective Length (Le): In principle ,the effective length(Le) could be the caisson width plus 0.5m. Usually if caisson width> 20m, airbags can be arranged as two rows.
Operating Pressure of Airbags : Actual Bearing Capacity of Unit= Weight of Caisson (G)/Total length of airbags (Le x N1). The category of airbags is decided by the final figure of Actual Bearing Capacity of Unit x 1.2, and then take this figure to refer to the Specification Sheet of Airbags. (N1 stands for the pieces of airbags under caisson body)
NO.s of Caisson Moving Airbags (N): The numbers of airbags for caisson moving is the pieces under caisson body (N1) plus the spare ones in front of the caissons (N2). The gap of airbags arrangement is about 2m under caissons, so N1=Length of Caisson (Lc)/2+ 1; the NO.s of spare airbags is decided by the distance of moving, and generally it should be more than 5 pieces.




  • High safety level, safety coefficient more than 4.0, airbags with safety valve.
  • High pressure resistance, lifting airbags common working pressure can be 0.2Mpa-0.5Mpa,caisson moving airbags common working pressure can be 0.1Mpa-0.4Mpa.
  • Good air tightness , pressure decrease lower than 10% within 24 hours.
  • Long life guaranteed , airbags can be repeatedly used for more than 100 times under the condition of normal use.
  • A complete set of solutions is available.
  • Whole scheme design about delivery of prefabricated caisson.
  • Design of caissom precasting yard.
  • Scheme design of caisson delivery.
  • Supply of airbag products.
  • Technical guidance on the construction site.
  • Training on builders.

Excellent quality of products and reasonable costing drives our adoption in the global market.

NANHAI strives to help our customers to succeed.

Our professional teams are able to offer a best solution for impossible even delivery options.

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