A Closer Look at Prevailing Civil Engineering Practice - European ...

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A Closer Look at Prevailing Civil Engineering Practice, What, Why and How Vincent T. H. CHU 5. What is the difference between breasting dolphin and mooring dolphin A dolphin is an isolated marine structure for berthing and mooring of vessels. It is not uncommon that the combination of dolphins with piers could drastically reduce the size of piers. Dolphins are generally divided into two types, namely breasting dolphins and mooring dolphins. Breasting dolphins serves the following purposes: (i) Assist in berthing of vessels by taking up some berthing loads. (ii) Keep the vessel from pressing against the pier structure. (iii) Serve as mooring points to restrict the longitudinal movement of the berthing vessel. Mooring dolphins, as the name implies, are used for mooring only and for securing the vessels by using ropes. They are also commonly used near pier structures to control the transverse movement of berthing vessels. Fig. 4.2 Breasting dolphin and mooring dolphin 6. Why is it desirable to select fenders with low reaction force It is always in the interest of engineers to select fenders with high energy absorption with low reaction force. The reaction force is an important factor in the design of quay walls because sufficient savings could be resulted from low reaction force exerted by fenders. In many fender systems such as rubber fender, load-spreading panel is often adopted to cater for high reaction force. Hence, the use of fenders with low reaction force gets rid of 32
A Closer Look at Prevailing Civil Engineering Practice, What, Why and How Vincent T. H. CHU the need of load-spreading panel so that significant economies could be made. 33
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A Closer Look at Prevailing Civil Engineering Practice - European ...

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