Alternatif Perencanaan Pondasi Pada Pembangunan Gedung Perkantoran 8 Lantai Di Jakarta Barat

Tantowi, Willy (2022) Alternatif Perencanaan Pondasi Pada Pembangunan Gedung Perkantoran 8 Lantai Di Jakarta Barat. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Jakarta merupakan salah satu kota dengan gedung pencakar langit paling banyak di Asia (The Skyscraper Center, 2021). Harga tanah yang tinggi mengakibatkan gedung bertingkat tinggi sebagai alternatif yang lebih murah dibandingkan membangun bangunan bertingkat rendah. Salah satu gedung tingkat tinggi yang akan dibangun di Jakarta adalah gedung perkantoran 8 lantai dengan 1 lantai semi basement. Gedung ini terletak bersebelahan dengan sungai sehingga muka air tanah ada pada kedalaman -1 m. Selain itu, di sekitar wilayah pembangunan sudah ada pemukiman warga dan gedung apartemen. Jenis pondasi yang direncanakan untuk gedung tersebut adalah pondasi bored pile. Pemilihan pondasi ini didasarkan oleh jenis tanah dasar lempung dan lanau dengan konsistensi lunak sampai kedalaman 7-10 meter. Kondisi tanah lunak yang tidak terlalu dalam serta gedung yang hanya memiliki 8 lantai memungkinkan perencanaan pondasi alternatif. Secara umum, pemilihan pondasi alternatif sangat bergantung pada fungsi struktur yang ditopang, kondisi tanah di bawah struktur, kondisi wilayah di sekitar pembangunan, dan biaya pondasi itu sendiri. Untuk itu, pada perencanaan ini akan dipilih alternatif pondasi rakit dan pondasi tiang-rakit. Masalah utama yang timbul adalah bagaimana mendesain pondasi yang memenuhi kriteria persyaratan SNI 8460:2017, efisien dari segi biaya, dan cepat pelaksanaannya. Pondasi rakit direncakan memiliki lebar 43 meter, panjang 43 serta tebal 1,2 meter. Pondasi rakit memiliki daya dukung sebesar 220,37 kN/m2 dan penurunan total sebesar 93 cm. Maka dari itu, pondasi rakit memiliki daya dukung yang lebih besar dari beban struktur tapi tidak memenuhi syarat penurunan SNI 8460:2017. Sedangkan pondasi tiang rakit memiliki penurunan total sebesar 4,3 cm dengan komponen tiang menanggung 93% beban dan termobilisasi sebesar 77%. Berdasarkan hasil analisis yang telah dilakukan, didapatkan kesimpulan bahwa alternatif yang mungkin hanya pondasi tiang-rakit karena pondasi rakit tidak memenuhi persyaratan penurunan SNI
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Jakarta is one of the cities with the most skyscrapers in Asia (The Skyscraper Center, 2021). High land prices have resulted in high-rise buildings as a cheaper alternative than building low-rise buildings. One of the high-rise buildings to be built in Jakarta is an 8-stories office building with 1 semi-basement floor. This building is located next to the river so that the groundwater level is at a depth of -1 m. In addition, around the construction area there are already residential areas and apartment buildings. The type of foundation that is planned for the building is bored pile foundation. The selection of this foundation is based on the type of subgrade clay and silt with soft consistency to a depth of 7 – 10 meters. The soft soil conditions that are shallow and the building which only has 8 floors allows for alternative foundation design. In general, the selection of alternative foundations is highly dependent on the function of the supported structure, the condition of the soil under the structure, the condition of the area around the construction, and the cost of the foundation itself. For this reason, raft foundation and a pile-raft foundation will be chosen as an alternative design. The main problem that arises is how to design a foundation that meets the criteria for the requirements of SNI 8460:2017, efficient in terms of costs, and fast in construction. The raft foundation is planned to be 43 meters wide, 43 meters long and 1.2 meters thick. The raft foundation has a bearing capacity of 220,37 kN/m2 and a total settlement of 93 cm. Therefore, the raft foundation has a bearing capacity that is greater than the structural load but does not meet the requirements for settlement in SNI 8460:2017. While the raft pile foundation has a total settlement of 4.3 cm with the pile component bearing 93% of the load and being mobilized by 77%. Based on the results of the analysis that has been carried out, it is concluded that the only possible alternative is a pile-raft foundation because the raft foundation does not meet the requirements for settlement in SNI.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	lempung lunak, pondasi rakit, pondasi tiang-rakit, SNI 8460:2017, soft clay, raft foundation, pile raft foundation, SNI 8460:2017
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	13 Jan 2026 04:29
Last Modified:	13 Jan 2026 04:29
URI:	http://repository.its.ac.id/id/eprint/129550

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