Desain Alternatif Jembatan Ngasem Dan Penyesuaian Trase Jalan Tol Solo - Yogyakarta - NYIA Kulon Progo Sta 0+596 - Sta 0+800 Menggunakan Box Girder Prestressed Concrete Metode Balance Cantilever

Urfan, Zamroni (2023) Desain Alternatif Jembatan Ngasem Dan Penyesuaian Trase Jalan Tol Solo - Yogyakarta - NYIA Kulon Progo Sta 0+596 - Sta 0+800 Menggunakan Box Girder Prestressed Concrete Metode Balance Cantilever. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Jembatan Ngasem merupakan bagian dari proyek pembangunan Jalan Tol Solo-Yogyakarta - NYIA Kulon Progo yang terletak pada STA 0+596 – STA 0+800. Jembatan Ngasem eksisting direncanakan menggunakan struktur I girder prestressed concrete yang terdiri atas 6 bentang dengan salah satu bentang terdapat Jalan Nasional Solo - Semarang di bawahnya. Konstruksi Jembatan Ngasem cukup beresiko karena saat proses erection girder dapat mengganggu aktivitas lalu lintas jalan di bawahnya. Oleh karena itu diperlukan solusi lain yaitu dengan menggunakan struktur box girder metode balance cantilever cast in place. Struktur box girder memiliki kelebihan yaitu metode pelaksanaan yang lebih aman, menghemat jumlah pilar dan pondasi karena hanya terdiri atas 3 bentang dan 4 pilar. Struktur box girder dirancang berdasarkan data eksisting lalu dilakukan preliminary design untuk menentukan dimensi-dimensi jembatan. Analisa yang dilakukan terdiri atas analisa pembebanan, analisa tahap kantilever dan analisa tahap menerus. Pada analisa pembebanan dihitung beban-beban yang bekerja pada struktur. Pada tahap kantilever dilakukan analisis gaya dalam akibat berat sendiri struktur dan gaya prategang untuk memastikan bahwa tegangan yang terjadi pada beton memenuhi tegangan ijinnya baik tarik maupun tekan. Pada tahap menerus dilakukan analisis gaya dalam akibat beban-beban yang bekerja pada jembatan. Selanjutnya dilakukan kontrol terhadap momen retak, momen batas dan kontrol lendutan pada jembatan. Hasil akhir dari tugas akhir ini berupa laporan perhitungan dan gambar teknik yang menyajikan detail perencanaan struktur jembatan diantaranya yaitu dimensi penampang box girder, pilar dan pondasi serta lay out tendon dan penulangan setiap elemen struktur jembatan.
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The Ngasem Bridge is part of the Solo - Yogyakarta - NYIA Kulon Progo Toll Road development project which is located at STA 0+596 – STA 0+800. The existing Ngasem Bridge is planned to use an I girder prestressed concrete structure consist of 6 spans with one of the spans crossing the Solo - Semarang national road. The construction process of the Ngasem bridge is quite risky because during the erection of the girders it can disrupt road traffic activity underneath. Therefore, another solution was needed, namely by using a box girder structure using the balanced cantilever cast in place method. The box girder structure has the advantage of being a safer construction method, saving on the number of pillars and foundations because it only consists of 3 spans and 2 pillars. The box girder structure is designed based on existing data and then a preliminary design is carried out to determine the dimensions of the bridge. The analysis performed includes loading analysis, cantilever stage analysis and continuous stage analysis. In the loading analysis, the loads that working on the structure are calculated. At the cantilever stage an analysis of the internal forces due to the self-weight of the structure and the prestressing forces is carried out to ensure that the stress that occurs in the concrete meets the allowable stress both in tension and in compression. In the continuous stage an internal force analysis is carried out due to the loads acting on the bridge. Furthermore, control of cracking moment, limiting moment and deflection control of the bridge is carried out. The final result of this final project is a calculation report and technical drawings which present detailed planning of the bridge structure including the cross-sectional dimensions of the box girders, pillars and foundations as well as the lay out of the tendons and reinforcement of each bridge structural element.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Box girder, prestressed concrete, balance cantilever, cast in place
Subjects:	T Technology > TE Highway engineering. Roads and pavements > TE7 TG300 Bridges--Design and construction. T Technology > TG Bridge engineering > TG362 Box girder bridges--Design and construction.
Divisions:	Faculty of Vocational > Civil Infrastructure Engineering (D4)
Depositing User:	Zamroni Urfan
Date Deposited:	08 Aug 2023 04:17
Last Modified:	08 Aug 2023 04:17
URI:	http://repository.its.ac.id/id/eprint/103920

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