BACKGROUND/AIM Pneumatic caisson engineering has been developed for large civil engineering constructions. Because of complaints of blurred vision by personnel working in pneumatic caissons, the development of myopia was suspected. The aim of this study was to determine the cause of the blurred vision and the mechanism underlying the changes. METHODS 12 caisson workers underwent a complete op...

In order to solve the towing problem on water of the open caisson in the construction of the large scale bridge efficiently, combining with the towing operation project, the dragged open caisson and environmental data, etc. we design and produce the open caisson physical model and configure the test environment, use the force cell to collect real-time experimental data, analyze and demonstrate ...

Caisson disease is an important condition that can be seen in diver. It is an important form of decompression illness that requires proper therapeutic management[1,2]. The problem can be sporadically seen in any coastal country. In Thailand, as a country with a long coastal line of more than one thousand kilometers, this problem can be seen. According to the recent report, this condition is an ...

A monolithic caisson is one of the major structural components commonly used in the construction of docks, breakwaters, and container terminal quay walls. Since the structure of monolithic caissons is typical and somewhat simple, its design process is also typical and repetitive, but still time consuming. To reduce the total time and enhance productivity, we developed a parametric model in Revi...

The Eads Bridge (St. Louis) and the Brooklyn Bridge (New York City) were testing grounds for caisson construction. These caissons were enormous compressed air boxes used to build riverine piers and abutments anchoring the bridges. Caisson meant faster and cheaper construction, but there was a hidden cost---caisson disease (decompression sickness). Within caissons, workers labored at pressures a...

Tacoma Narrows Constructors (TNC) is building a new suspension bridge in Tacoma, close to Seattle, Washington State, USA. The new bridge will be built just south of the existing bridge mounted on two caissons, referred to as East Caisson (Tacoma side) and West Caisson (Gig Harbor side). Each pier is about 80’ wide and 130’ long in plan. The mooring system for each caisson consists of two sets o...

Suction caisson is a type of floor foundation for the offshore structures that is also called suction pile, bucket foundation, suction anchor, or sometimes ridge foundation depending on its application. In two past decades, this type of foundation has been widely used around the world as the fixed offshore foundation, anchor of the floating platforms, as well as the foundation of other marine s...

Civil Surgeon, Broach The following is a record of two cases ui caisson sickness presenting aphasia as one of the chief symptoms. This is rare among the manifestations of the sickness. Usually the symptoms of caisson sickness appear immediately or within a short time after the patient comes out of the air-lock or diving suit, but in this instance they have appeared slowly and after a long inter...

In this study, the structural performance of the gravity-type caisson structure is assessed from vibration-based system identification. To achieve the objective, the following approaches are implemented. Firstly, a structural identification algorithm based on the use of vibration characteristics is outlined. Structural stiffness and damping are selected as two key parameters to be identified fo...

Suction caissons are widely used foundations in offshore engineering. The change excess pore pressure and seepage field caused by penetration suction significantly affects the soil resistance around caisson wall tip, also deformation of within adjacent to caisson. This study uses Arbitrary Lagrangian–Eulerian (ALE) large solid-fluid coupled FEM investigate changes during process installation sa...