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Karakteristik Kompresibilitas dan Kuat Geser pada Tanah Lempung Berdasarkan Uji CPT, SPT dan Laboratorium di Cikarang: Compressibility and Shear Strength Characteristics of Clay Based on CPT, SPT and Laboratory Tests in Cikarang Bambang Suharyadi; Aswin Lim; Rinda Karlinasari
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 12 No 1 (2024): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (Januari 2024)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v12i1.7356

Abstract

The Jakarta-Cikampek Elevated toll road was built to add to the existing toll road section. In this project, the field investigation tests carried out are the Cone Penetrartion test (CPT) and the Standard Penetration Test (N-SPT). Many studies have been conducted to obtain the compressibility value (cc) and shear strength value (su) of clay because each clay in a region has different compressibility characteristics and shear strength values. This study aims to determine the compressibility characteristics and shear strength of clay in the Cikarang area by using field investigation data in the form of CPT test of 10 points and N-SPT test of 12 points and laboratory data used from N-SPT drill points of 21 tube samples. CPT and N-SPT data are grouped based on the closest distance, the test area is dominated by Sandy clay and the linear regression equation obtained from both data relationships is qc = 0.51N with an upper limit equation qc = 1.2N and for the lower limit qc = 0.2N. From the results of the analysis for the shear strength value of the soil obtained from the relationship of the shear strength value of the soil to the N-SPT of Su = 8N-SPT, and for the level of compressibility at the location in Cikarang has a high level of compressibility with the relationship of compressibility to the pore number (eo) obtained equation Cc = 0.40eo and with the level of activity of relatively inactive clay soil.
REHABILITATION AND RECONSTRUCTION OF LANDSLIDES IN THE AL-HUSAINIYYAH JUNIOR HIGH SCHOOL AREA REHABILITASI DAN REKONSTRUKSI LONGSORAN LERENG DI LINGKUNGAN SMP AL-HUSAINIYYAH Herni Setiawan; Yohanes Lim Dwi Adianto; Januar Yeremy; Tan Leonardi; Obaja Triputera Wijaya; Helmy Hermawan Tjahjanto; Budijanto Widjaja; Ignatius Tommy Pratama; Aswin Lim; Imam Ahmad Fadhil
JURNAL PENGABDIAN KEPADA MASYARAKAT Vol. 32 No. 2 (2026): APRIL-JUNI
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/9mcgc576

Abstract

Longsoran di lingkungan SMP Al-Husainiyyah tahun 2023 menyebabkan putusnya jalan penghubung, jalan lingkungan, saluran air drainase dikaki lereng sehingga mobilitas warga terhambat. Tim Pengabdi Fakultas Teknik Universitas Katolik Parahyangan (UNPAR) telah mengidentifikasi penyebab longsor dan hasil kajian teknisnya dipublikasikan dalam jurnal Dinamisia Agustus 2024. Rehabilitasi dan rekonstruksi longsoran lereng diusulkan menggunakan sistem dinding penahan tanah (DPT) kantilever beton. Value engineering memutuskan mengganti material beton menjadi material batukali, pengisi sub-base jalan menggunakan sistem geofoam sebagai pengganti tanah urugan. Alternatif ini memberi value dari aspek pemilihan material dan metode pelaksanaan. DPT mendapat tekanan dorong lebih kecil dari geofoam. Perbaikan jalan penghubung selesai lebih cepat dan dapat berfungsi kembali. Hamparan geomat, hydroseeding, dan saluran air pada permukaan lereng, melindungi permukaan dari longsoran tanah. Ada enam kegiatan utama dalam konstruksi ini yaitu persiapan, Strauss Pile, DPT, geofoam, geomat, dan saluran. Komunitas sekolah dan masyarakat mendapatkan distribusi oksigen lebih banyak dengan menggunakan material pilihan ini. Kata kunci: dinding penahan tanah,  lapisan geofoam,  hamparan geomat, hydroseeding, saluran air  
Studi tentang Laju Perubahan Volume dan Konsolidasi Tanah Very Soft dan Ultra Soft Berdasarkan Teori Terzaghi dengan Menggunakan Uji Oedometer dan CPTu Maria Septhree Winna Sitohang; Paulus Pramono Rahardjo; Aswin Lim
Jurnal Teknik Sipil Vol 22 No 1 (2026): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v22i1.12973

Abstract

Very soft and ultra soft soils are types of soil with high water content, very soft consistency, and low bearing capacity, making them susceptible to deformation and subsidence due to loading. This study aims to determine the correlation between volume change parameters and consolidation in very soft and ultra-soft soils based on laboratory testing (oedometer test) and in-situ testing (Cone Penetration Test with Pore Pressure Measurement/CPTu). The parameters studied include the consolidation coefficient (Cv), compression index (Cc), volume change coefficient (mv), and parameter α as the correlation between the mv value from the oedometer test and the corrected cone resistance (qt) value from CPTu. The results show that the Cv value varies with each increase in effective stress. Additionally, the consistency of the α correlation values indicates that CPTu can be used to quickly and efficiently estimate volume change coefficient (mv) values in the field. Therefore, CPTu can serve as an alternative for predicting the behavior of very soft and ultra-soft soil conditions in situ in a more representative manner. 
PERBANDINGAN PERILAKU PERBAIKAN TANAH METODE PRELOADING VAKUM DAN PRELOADING TIMBUNAN DENGAN ELEMEN HINGGA 2D Zakwan Gusnadi; Paulus Pramono Rahardjo; Aswin Lim
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 2 (2021): Volume 11 Nomor 2, September 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i2.513

Abstract

Abstrak Perbaikan tanah lunak dengan pra-beban (preloading) dimaksudkan untuk mereduksi penurunan pada masa operasional dan meningkatkan kekuatan tanah. Preloading dalam perbaikan tanah lunak biasanya dikombinasikan dengan Prefabricated Vertical Drain (PVD) guna mempercepat proses disipasi air pori. Metode preloading dapat dilakukan dengan cara konvensional menggunakan timbunan ataupun dengan tekanan vakum. Untuk mengetahui perilaku preloading dengan tekanan vakum ini digunakan metode elemen hingga 2D menggunakan program bantu ABAQUS (berasal dari nama alat hitung Abacus). Hasil analisis menunjukan pada hari ke 217 perbaikan preloading vakum menghasilkan penurunan sebesar 1,23 m dan preloading timbunan menghasilkan penurunan sebesar 1,18 m, namun pola penurunan yang terjadi dengan preloading vakum terlihat lebih besar pada 35 hari pertama perbaikan. Pada perubahan tekanan air pori preloading vakum menunjukan reduksi tekanan air pori, sedangkan dengan preloading timbunan tekanan air pori meningkat pada masa konstruksi dan tereduksi pada masa perbaikan. Lebih lanjut pada perilaku deformasi lateral di kaki timbunan, metode preloading vakum menunjukan pergerakan lateral ke arah dalam area perbaikan sedangkan dengan preloading konvensional pergerakan lateral tanah terjadi ke arah luar area perbaikan. Kata kunci: ABAQUS, Elemen Hingga 2D, Perbaikan Tanah, Vakum Preloading Abstract Improvement of soft soil by preloading is intended to lower the settlement of operation time and increasing soil strength. Preloading in the improvement of soft soil usually combined with Prefabricated Vertical Drain (PVD) to accelerate the pore water dissipation process. The preloading method can be done in a conventional way using the embankment or vacuum pressure. To find out the behaviour of preloading with this vacuum pressure, we used the finite element method 2D by using the ABAQUS support program. The result of the analysis shows on the 217th day, vacuum preloading improvement produces a settlement by 1.23 m and the embankment preloading produce 1.18 m, but the settlement pattern that occurs with preloading vacuum was seen to be greater in the first 35 days of improvement. In terms of changes in pore water pressure on vacuum preloading shows that the pattern of pore water pressure is reduced, while with pore eater pressure on preloading heap increased during construction and reduced during improvement. Further on the lateral movement behaviour in the toe of the embankment, the vacuum preloading method shows the lateral movement towards the improvement area while embankment preloading shows the lateral movement occurs towards the outside of the improvement area. Keywords: ABAQUS, Finite Element 2D, Soil Improvement, Vacuum Preloading
Co-Authors Adrianus Renaldy Aglia, Grisella Ahmad Kemal Arsyad Albert Sebastian Aldrianita, Tabitha Alfrendo Satyanaga Alfrendo Satyanaga Anastasia Sri Lestari Andra Ardiana Andy Sugianto Andy Sugianto Anthonius Steven Sutanto Ardiana, Andra Arif Yunando Soen Arif Yunando Sunanhadikusuma Bambang Suharyadi Bobby Minola Ginting Budijanto Widjaja Cheryl, Monica Frances Christian William Munaba Clinton Girsang Darian, Evan Dary Aulia Muhammad David Kristian Erdian, Andreas Evan Darian Ezra Yoanes Setiasabda Tjung Fadhil, Imam Ahmad Felix Hidayat Gofar, Nurly Hartieni, Patricia Helmy Hermawan Tjahjanto Helmy Hermawan Tjahjanto Henky Muljana Henky Muljana Herni Setiawan Herry Suryadi Djayaprabha Hizbulmalik, Ziyan Ignatius Tommy Pratama Ignatius Tommy Pratama Ihut, Karolina Villa Delfia Imam Ahmad Fadhil Januar Yeremy Jogiadinata, Evelyn Johannes Adhijoso Tjondro Lie, Edwin Maria Septhree Winna Sitohang Martin Wijaya Muhammad Hanif Muhammad, Dary Aulia Obaja Triputera Wijaya Octavianus Arvin Sukiwan Paulus Pramono Paulus Pramono Rahardjo Paulus Pramono Rahardjo Putra, Heriansyah Rinda Karlinasari Simon Heru Prassetyo Siska Rustiani Stefani Wiguna Susiyanti, Angela Dewi Maharani Syifanaya, Sharfina Faradiba Sylvia Herina Tan Leonardi Theresita Herni Setiawan Varian Harwin Batistuta Verguson, Yoghi Jo Vienti Hapsari Vinna Fransiska Chou Wellyanto Wijaya Widjaja, Hasky Wijaya, Martin Wijaya, Obaja Triputera William, Octavianus Yiska Vivian Chritiansen Wijaya Yohanes Albrecht Montol Yohanes Lim Dwi Adianto Zakwan Gusnadi Zakwan Gusnadi