ELEVATED CAUSEWAY SECTIONS

The elevated causeway pier facility (ELCAS) provides a link between lighterage and the beach by bridging the surf zone. The standard ELCAS consists of six 3x15 approach or roadway sections and six 3x15 pierhead sections (fig. 10-36). The pierhead is two sections wide by three sections long. Since the facility is modular, it may be expanded by enlarging the pierhead and/or adding approach sections. The basic component of the ELCAS is the 3 x 15 intermediate causeway section that is converted to the elevating mode by the addition of spudwells. Spudwells provide the attachment between the causeway deck and the supporting piling. Internal spudwells (fig. 10-37) are used where the full width of the causeway section is required for traffic and to support the fender piles along the fender side of the pierhead. The internal spudwell incorporates four grooved connection pins that are inserted into four receiver boxes attached to the side of the causeway. Two guillotines are lowered into the pin grooves behind the receiver boxes to secure the spudwell to the section. A steel-angled locking key is used to lock the guillotine into place. External spudwells (fig. 10-38)

Figure 10-37-Internal spudwell.

Figure 10-38.-External Spudwell.

are used in the outboard strings of pierhead sections, where side to aide connection with another section is required, and at load-bearing points, such as under the container handling crane. The external spudwell is fabricated into a frame having the same overall dimensions as a PI pontoon. It is interchangeable with

Figure 10-39.-Types and positions of causeway sections in the ELCAS.

the PI pontoon and uses the same attaching hardware. The ELCAS consists of four distinct parts as follows: 2 The PIERHEAD is made up of four types of sections. It is the offshore section of the ELCAS and supports cargo unloading functions. The pierhead includes a crane installation for off-loading lighterage and a turntable for turning trucks around on the causeway.

2 The FENDER SECTIONS provide an interface between the pierhead and the lighterage.

2 The ROADWAY provides for two-way traffic between the pierhead and the beach.

2 The BEACH RAMP provides access from the beach to the ELCAS.

The types of sections used and their locations are shown in figure 10-39.

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