Perencanaan Underpass Simpang Mandai Makassar Dengan Metode Jacked Box Tunnel

Prakasa, Muh. Dwiyanto Agung (2017) Perencanaan Underpass Simpang Mandai Makassar Dengan Metode Jacked Box Tunnel. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Simpang Mandai merupakan simpang lima yang menghubungkan jalan tol kemerdekaan, jalan menuju kabupaten Maros, akses menuju Bandara serta jalan dari arah Makassar. Oleh karena itu, daerah Simpang Mandai sering terjadi kemacetan lalu lintas. Dalam rangka mengatasi hal tersebut, Kementerian Pekerjaan Umum dan Perumahan Rakyat RI Direktorat Jenderal Bina Marga membangun sebuah Underpass dengan tujuan memperlancar lalu lintas. Underpass Simpang Mandai memiliki total panjang 1050 m yang terdiri atas area tertutup dengan panjang 110 m dan area terbuka 940 m. Underpass ini dibangun dengan Secant pile sebagai dinding penahan tanah serta menggunakan metode open cut dalam proses konstruksi. Secant pile terdiri atas Primary pile dan Secondary pile dengan diameter masing-masing 80 cm dengan mutu K-175 dan K-300. Dalam proses konstruksi, diharuskan untuk menutup akses jalan dan mengalihkan lalu lintas. Hal ini menyebabkan kemacetan lalu lintas yang tinggi dan akan berlangsung lama mengingat metode konstruksi yang digunakan membutuhkan waktu yang cukup panjang. Dalam rangka menghindari kemacetan lalu lintas akibat pembangunan Underpass, diusulkan alternatif metode konstruksi yang digunakan yaitu Jacked Box Tunnel. Jacked box tunnel adalah sistem terowongan box yang didorong oleh alat hydraulic. Jacked box tunnel menggunakan beton precast berbentuk kotak sebagai struktur utama yang terdiri atas beberapa segmen dan dihubungkan menggunakan kabel prategang. Metode konstruksi ini juga dilengkapi dengan nose blade dan anti drag system untuk mengurangi koefisien geser agar tanah disekitar box tunnel tidak mengalami pergeseran selama proses jacking. Alasan dipilihnya Jacked Box Tunnel sebagai alternatif perencanaan Underpass adalah selama pelaksanaan konstruksi Jacked Box Tunnel, jalan simpang lima diatasnya tidak harus ditutup serta mampu menghemat waktu konstruksi. Dari hasil perencanaan yang dilakukan, diketahui bahwa Jacked Box Tunnel terdiri atas 11 segmen box tunnel dengan panjang 10 m per segmen. Jacked Box Tunnel yang digunakan terbuat dari material beton bertulang dengan tebal plat atas, dinding dan bawah adala 1,1 m. Jacked Box Tunnel dilengkapi dengan anti drag system yang berupa zynclaume sheets dan dilumuri dengan minyak pelumas (grease effect). Dibutuhkan 6 buah alat jack hydraulic dengan kapasitas 1000 ton per alat untuk mampu mendorong seluruh segmen box tunnel. Dinding penahan tanah yang digunakan dalam konstruksi area terbuka underpass adalah Corrugated Concrete Sheet Pile type W-600 A1000. Sheet Pile dipasang sedalam 22 m untuk kedalaman galian 10.5 m dengan 2 buah strut untuk meningkatkan kekauan sheet pile. ================================================================================= Simpang Mandai is an intersection of five that connects the freeway toll road, the road to Maros district, access to the airport and the road from Makassar. Therefore, Simpang Mandai area often occurs traffic jam. In order to overcome this, the Ministry of Public Works and People's Housing of the Republic of Indonesia Directorate General of Highways built a Underpass with the aim of expediting traffic. Mandai Simpang underpass has a total length of 1050 m which consists of a closed area with a length of 110 m and an open area of 940 m. The underpass is built with a secant pile as a retaining wall and uses an open cut method in the construction process. Secant pile consists of Primary pile and Secondary pile with diameter of 80 cm each with quality K-175 and K-300. In the construction process, it is necessary to close road access and divert traffic. This causes high traffic congestion and will last long considering the construction method used takes a long time. In order to avoid traffic congestion caused by Underpass development, it is proposed alternative method of construction used is Jacked Box Tunnel. Jacked tunnel tunnel is a box tunnel system driven by a hydraulic device. Jacked tunnel box uses box-shaped precast concrete as the main structure consisting of several segments and connected using prestressing cable. This construction method is also equipped with nose blade and anti drag system to reduce the shear coefficient so that the ground around the tunnel box does not experience a shift during the process of jacking. The reason for choosing Jacked Box Tunnel as an alternative to Underpass planning is during the construction of the Jacked Box Tunnel, the intersection of five above does not have to be closed and can save construction time. From the results of planning done, it is known that the Jacked Box Tunnel consists of 11 segments tunnel box with a length of 10 m per segment. Jacked Box Tunnel used is made of reinforced concrete material with thick plate top, wall and bottom is 1.1 m. Jacked Box Tunnel is equipped with anti drag system in the form of zynclaume sheets and smeared with grease effect (grease effect). It takes 6 pieces of hydraulic jack tool with a capacity of 1000 tons per tool to be able to push the entire box tunnel segment. The retaining wall used in the underpass open area construction is Corrugated Concrete Sheet Pile type W-600 A1000. Sheet Pile mounted as deep as 22 m for 10.5 m deep depth with 2 struts to increase sheet pile sheath.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Jacked box tunnel, Anti Drag System, Jack Hydraulic, Underpass, Simpang Mandai, Makassar
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA645 Structural analysis (Engineering)
T Technology > TA Engineering (General). Civil engineering (General) > TA681 Concrete construction
T Technology > TA Engineering (General). Civil engineering (General) > TA710 Soil stabilization
Divisions: Faculty of Civil Engineering and Planning > Civil Engineering > (S1) Undergraduate Theses
Depositing User: Muhammad Dwiyanto Agung Prakasa
Date Deposited: 28 Sep 2017 02:10
Last Modified: 06 Mar 2019 07:06
URI: http://repository.its.ac.id/id/eprint/44960

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