Alternatif Perencanaan Dinding Penahan Tanah Stasiun Bawah Tanah Bundaran HI dengan Diaphragm Wall, Soldier Pile, dan Secant Pile pada Proyek Pembangunan MRT Jakarta

Andikaputra, Adityo Muhammad (2017) Alternatif Perencanaan Dinding Penahan Tanah Stasiun Bawah Tanah Bundaran HI dengan Diaphragm Wall, Soldier Pile, dan Secant Pile pada Proyek Pembangunan MRT Jakarta. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proyek Pembangunan Mass Rapid Transit (MRT) Jakarta adalah salah satu solusi Pemerintah Provinsi DKI Jakarta untuk mengurangi masalah kemacetan dan tingkat kepadatan lalu lintas di Kota Jakarta. Salah satu stasiun MRT bawah tanah yang dibangun adalah Stasiun MRT Bundaran HI di Jalan MH Thamrin, Jakarta Pusat. Stasiun Bawah Tanah MRT Bundaran HI dibangun di bawah median jalan raya dengan lebar median kurang dari 20 meter. Hasil pengetesan pada laboratorium menunjukkan bahwa tanah di kawasan tersebut dominan tanah lanau dan lempung dengan muka air tanah yang cukup tinggi, yaitu berkisar antara 1,00 – 2,40 di bawah permukaan tanah pada 8 titik borlog yang ditinjau. Pada perencanaan stasiun bawah tanah Bundaran HI diperlukan struktur dinding penahan tanah dengan panjang 430 meter dan kedalaman stasiun 20 meter sebagai struktur bangunan utama dimana fungsi dinding penahan tanah tersebut adalah menjaga kestabilan tanah dan mencegah keruntuhan tanah di samping stasiun bawah tanah tersebut akibat tekanan tanah lateral yang diterima oleh dinding penahan tanah. Pada tugas akhir ini dilakukan alternatif perencanaan dinding penahan tanah dengan diaphragm wall, secant pile, dan soldier pile menggunakan metode perhitungan Stress and Deformation : Beam on Elastic Foundation. Tujuan dibuatnya alternatif adalah membandingkan perencanaan tiap alternatif dalam hal kestabilan, kekuatan, deformasi, metode pelaksanaan dan kebutuhan material dinding penahan tanah. Hasil yang didapatkan berdasarkan analisa dan perhitungan pada Diaphragm Wall didapatkan tebal 1.4 meter dengan kedalaman 40 meter dan deformasi maksimal 3.45 cm. Pada secant pile didapatkan diameter sebesar 1.5 meter dengan kedalaman 40 meter dan deformasi maksimal 3.21 cm. Pada soldier pile dengan profil baja H – Beam 1000 x 400 x 22 x40 ditanam secara disambung sedalam 40 meter tidak dapat digunakan sebagai alternatif perencanaan karena deformasi yang terjadi adalah 10.83 cm dikhawatirkan merusak lingkungan sekitar. Berdasarkan hasil deformasi, estimasi biaya dari segi material, dan metode pelaksanaannya, dipilih perencanaan dengan menggunakan Diaphragm Wall sebagai dinding penahan tanah Stasiun Bawah Tanah MRT Bundaran HI. ============================================================================================= The construction of Mass Rapid Transit (MRT) Jakarta is one of many solutions from The Government of DKI Jakarta to decrease the traffic jam problem and the traffic density in Jakarta. One of the underground station is Bundaran HI Station that is located in Jl. MH Thamrin, Jakarta Pusat. This station is located in the median of the main road with approximate width of the median is around 20 meter. The laboratorium result shows that the soil is dominated by silty and clayey soil with high ground water level between 1.00 – 2.40 meter below the ground level on 8 points of borlog test. The underground station of Bundaran HI needs a retaining wall with length of 430 meter and depth of 20 meter as the main structure where the function of this retaining wall is to keep the soil stability and to avoid the collapse of the soil as the result of the lateral earth pressure that acts as load and gives pressure to the retaining wall. There are 3 (three) alternative designs that is used in this final project, which are diaphragm wall, secant pile, and soldier pile using the analysis method of Stress and Deformation : Beam on Elastic Foundation. The purpose of using three alternatives as the design is to compare each of the retaining wall in terms of the stability, deformation, construction method, and the volume estimation of material for the retaining wall. The result based on analysis and calculation shows that the width used for Diaphragm Wall is 1.4 meter with the depth of diaphragm wall is 40 meter and maximum deformation is 3.45 cm. Secant pile analysis and calculation result shows that the diameter used for secant pile is 1.5 meter with the depth is 40 meter and maximum deformation is 3.21 cm. Meanwhile, for soldier pile, analysis and calculation shows that with the H – Beam dimension of 1000 x 400 x 22 x 40, the maximum deformation is 10.83 cm. It can be concluded that the soldier pile retaining wall can not be used as an alternative because it is feared that with 10.83 deformation, the environment and construction around the station will be damaged. Based on the analysis of the deformation, the cost estimation of material, and also the construction method, it can be concluded that the Diaphragm Wall is used as the retaining wall of Bundaran HI Station.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Dinding penahan tanah, diaphragm wall, soldier pile, secant pile, uplift, beam on elastic foundation, retaining wall
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
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) > TA749 Soil stabilization
Divisions: Faculty of Civil Engineering and Planning > Civil Engineering
Depositing User: Adityo Muhammad Andikaputra
Date Deposited: 06 Oct 2017 04:17
Last Modified: 03 Jan 2018 03:54
URI: http://repository.its.ac.id/id/eprint/44579

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