Three-dimensional Numerical Analyses on Excavations in Central Jakarta with Consideration of Time-dependent Soil Behavior

Prakasa, Muhammad Dwiyanto Agung (2019) Three-dimensional Numerical Analyses on Excavations in Central Jakarta with Consideration of Time-dependent Soil Behavior. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Jakarta adalah kota yang berkembang dengan pesat dimana terdapat banyak pembangunan bawah tanah yang dilaksanakan, termasuk Jakarta Mass Rapid Transit (MRT). Kasus galian di Jakarta Pusat yaitu Stasiun Dukuh Atas dan Bundaran HI yang termasuk dalam bagian dari MRT Jakarta dianalisis dalam studi ini. Soft soil (SS) model diterapkan pada kedua stasiun untuk mengobservasi karakteristik galian. Pada stasiun Dukuh Atas, sebuah peningkatan besar pada deformasi dinding setelah 1 bulan penyelesaian slab pada tahap terakhir galian ditemukan, yang dimana perilaku ini tidak ditemui pada stasiun Bundaran HI. Hal ini disebabkan oleh efek creep dari tanah dan disipasi tekananan air pori karena keberadaan lapisan pasir. Analisis numerik tiga dimensi (3D) dengan soft soil creep model (SSC) untuk menganalisis perilaku tanah berbasis waktu dilakukan pada studi ini. SSC model memadai untuk memodelkan perilaku dari tanah lunak dengan mempertimbangkan creep tanah. parameter dari model SSC dikalibrasi dan diinterpretasikan berdasarkan hasil dari tes lapangan dan laboratorium. Pada studi ini, deformasi dinding setelah penyelesaian slab dibandingkan dengan deformasi dinsing setelah satu bulan penyelesaian slab. Hasil akhir dari model SSC akan dibandingkan dengan model SS yang merepresentasikan perilaku tanah tanpa creep. Selanjutnya, satu seri dari studi parametrik dilakukan untuk mengevaluasi parameter tanah yang paling sesuai dan detil desain, seperti dinding PIP dan bukaan pada slab
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Jakarta is a rapidly developing city where many underground constructions are built recently, including Jakarta Mass Rapid Transit (MRT). Excavation cases in Central Jakarta namely Dukuh Atas and Bundaran HI station which is part of Jakarta MRT were analyzed in this study. Soft soil (SS) model was employed to both stations to observe the excavation characteristics. At Dukuh Atas station, a large increment of wall deformation after 1 month of completion of the slab at the final stage of excavation has been found which does not exhibit at Bundaran HI station. It is presumably due to the creep effect of the soil and dissipation of pore water pressure because of the presence of the sand lens. Three-dimensional (3D) numerical analysis with soft soil creep model (SSC) to analyze the time-dependent soil behavior is carried out in this study. SSC model is adequate to model the behavior of soft soils by considering the soil creep. Parameters of the SSC model was calibrated and interpreted based on both results from in situ and laboratory tests. In this study, wall deformation after completion of the slab is compared to wall deformation at 1 month after completion of the slab. The output from the SSC model will be compared to the soft soil model (SS) that represents no creep behavior. Moreover, a series of parametric was conducted to evaluate the best fit soil parameters and design details, such as PIP wall and opening on slabs.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Soft soil creep model, time-dependent soil behavior, deep excavation, Jakarta clay
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction) T Technology > TA Engineering (General). Civil engineering (General) > TA681 Concrete construction
Divisions:	Faculty of Civil Engineering and Planning > Civil Engineering > 22101-(S2) Master Thesis
Depositing User:	Muhammad Dwiyanto Agung Prakasa
Date Deposited:	22 Jul 2026 08:35
Last Modified:	22 Jul 2026 08:35
URI:	http://repository.its.ac.id/id/eprint/69223

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