PERANCANGAN STRUKTUR DERMAGA PETI KEMAS DI PELABUHAN SAUMLAKI, KECAMATAN TANIMBAR SELATAN, KABUPATEN KEPULAUAN TANIMBAR, PROVINSI MALUKU
Diwa Puteratama1 dan Sri Murti Adiyastuti2
Program Studi Teknik Kelautan Fakultas Teknik Sipil dan Lingkungan Institut Teknologi Bandung
Jl. Ganesha 10, Bandung 40132
1dputeratama@gmail.com dan 2murtia704@gmail.com
ABSTRACT
Saumlaki Port is one of the collecting ports located in the Saumlaki area, South Tanimbar District, Tanimbar Islands Regency, Maluku Province. Saumlaki has abundant marine potential with several large trading centers such as the Olilit Old Market and also Saumlaki Town Square. With the existence of these trading centers and with the increasing needs and population of Maluku Province, Saumlaki as the Capital of Maluku Province, requires a port that can support economic activities in the Saumlaki capital and one of them is the existence of a terminal that contains container commodities at the Port of Saumlaki.
The purpose of writing this final report is to design a container wharf structure at Saumlaki Harbor, South Tanimbar District, Tanimbar Islands Regency, Maluku Province. The wharf structure is designed based on the applicable design criteria and includes the design of a trestle that connects the wharf to the mainland. The design in the Final Project includes determining the layout of the wharf, structural dimensions and structural elements of the wharf and trestle, structural modeling, structural reinforcement design, and analysis of soil bearing capacity.
In determining the layout of the wharf and the initial design of the structure, secondary data is used in the form of ship characteristics data and environmental data obtained from contractor documentation. In addition, there is also data on operational equipment used in the designed container wharf. Secondary data that has been processed will produce the parameters needed to determine the layout of the wharf and the design of the structure of the wharf and trestle.
SAP2000 software is used in structural modeling to determine the reliability criteria of the structure design against the loads acting on the structure. Modeling is carried out until the optimum structural design is obtained, namely with UCR (unity check ratio) which is in the range of 0.8 to 1.0 also deflection conditions that meet the allowable deflection. The optimum UCR value obtained for the wharf is 0.9401 at the pile 1 of the wharf and 0.9291 at the crane pile at the wharf, while for the trestle it is 0.9421 with a deflection at the wharf and the trestle also meets the permit deflection. The forces in the structural elements from the output of SAP2000 is used to design the reinforcement of the structural elements. Then, soil bearing capacity analysis is also carried out to obtain the required depth and height of the pile based on structural reactions and geotechnical data.
The Container wharf at Saumlaki Harbor is designed with the largest vessel measuring at 10,000 DWT having a length of 155 m and a width of 23 m with depth of -8.5 m from the LWS and a wharf floor elevation of +3.6 m from the LWS. The trestle which is designed to connect the wharf to the mainland has a length of 24 m and a width of 5 m with the same floor elevation as the wharf, which is +3.6 m from the LWS. To accommodate ships anchored at the wharf, there are Super Cone SCN900 E1.6 fenders and a tee bollard with a capacity of 15 tons.
Structural elements on the wharf and trestle consist of piles, beams, plates, and pile caps. The pile on the wharf has 2 size, the size of the pile 1 is 910 mm with a thickness of 8.74 mm and for the pile size 2 is 559 mm with a thickness of 5.7 mm, while the pile on the trestle has a size of 508 mm with a thickness of 6.5 mm. There are several types of beams and plates that are attached to the wharf with trestles to meet the design needs of the wharf. Then, the plate on the wharf and trestle has a thickness of 250 mm. The pile caps contained in the two structures follow the diameter of their respective piles and other requirements, so that the wharf pile caps measure 1800 mm x 1800 mm x 1500 mm also 2100 mm x 2100 mm x 1500 mm, while the trestle pile cap measures 1800 mm. x 1800mm x 1500mm.
Reinforcement for wharf and trestle concrete structural elements is carried out for each type of beam, slab, and pile cap. Then, based on the results of the analysis of the bearing capacity of the soil that has been carried out, t is found that the depth requirements for the pile bearing capacity and the design pile height are as follows. For the wharf structure, there are 2 types of piles. For piles 1 pier will be driven to a depth of 31 m from the seabed and the same will be done on wharf piles of 2 also on trestle piles until its meet the depth of the hard soil.
Keywords: Final Project, Dock Layout, Structural Modeling, Reinforcement, Soil Bearing Capacity
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