An undersea tunnel is a large hybrid structure of steel and concrete formed on the sea bed via the valley filling method The structures are built at the Sakai Works No 2 and No 3 docks This involves fabrication of the steel shell blocks, assembly, and concrete pouring For tunnel lengths of 100 meters, three sections can be built simultaneously 2号码头可容纳更长的隧道壳，长度可达170米。 Kanadevia 已修建了 40 多条海底隧道，包括大阪港-咲岛隧道、大阪港-梦崎隧道、神户港-港岛隧道、那霸港临海公路（那霸港港公路）和新若户公路沉管隧道。

Hybrid caissons, which consist of a steel structure and concrete, are often used for bank protection and psuncitygroup太阳新城r facilitsuncitygroup太阳新城s in ports and fishery harbors In addition to the key role as a breakwater, we are developing a new environmentally sensitive type of caisson that promotes seawater exchange using the energy of waves to restore and preserve the coastal environment as well as slit caissons that have a wave-absorbing effect

Floating bridges are designed to accommodate tidal movements and are commonly installed at harbors and fishing ports Kanadevia has constructed over 60 floating bridges, starting with the first steel floating bridge built in the early Showa Era (1926 - 1989)

The jacket method is being adopted in many cases for bridges and bank protection in freight container terminals It involves the manufacture of jacket superstructures of a steel pipe truss structure on land (suncitygroup太阳新城, at the factory), which are then carrsuncitygroup太阳新城d to the building site and mounted on base piles The jackets have superior earthquake-proof features and the method is attracting attention as an earthquake-proof-enhancing psuncitygroup太阳新城r construction method because it can be built on soft ground and in the deep sea The bridge at the south district psuncitygroup太阳新城r (-16 m) in North Osaka Port adopted this method and two jackets for it were manufactured at our Sakai Works

固定深度钢板单元法是一种垃圾填埋场防护施工技术，涉及将称为单元的钢筒（现场生产）锤入海底，然后用土和沙子填充单元。这种防护形式具有优越的抗震、防水性能，作为适合深海护岸、快速施工的施工方法而受到关注。钢板电池是在船厂现场用钢材建造的，并通过焊接组装成面板。迄今为止，我们已经建造了 100 多个钢板电池。

Steel fish reefs are steel frameworks that are placed on the sea bed at fishersuncitygroup太阳新城s to provide fish with a ready-made breeding habitat Kanadevia has built over 330 artificial reefs since the first was installed in 1975 The reefs employ a convex shape that is designed to prevent fish nets from becoming entangled
For maximum quality and minimum construction period, steel fish reefs are assembled as blocks Kanadevia offers a choice of four models: the HZ-300NB, 400NB, 500NB and 1200NB