Soil-Structure Interaction of a Piled Raft Foundation in Clay â a 3D Numerical Study

Piled raft foundation designs consider the contribution of the pile cap in transferring load to the ground and distributing load over the piles. The concept of a piled raft foundation requires a comprehensive evaluation of a number of factors that affect the performance of the foundation system. In this research the interaction among piles, pile cap and soil of a piled raft system on medium and stiff clays was studied. The effects of various distances between piles (s/d) in affecting load transfer mechanisms and deformation were considered. The study was performed by utilizing the 3D finite element method with a professional software package called Plaxis3D Foundation. A case study of the piled raft foundation performances of a foundation design for a high-rise building based on the soil stratification in Jakarta was also performed and is presented in this paper

Analisis Evaluasi Program Pelatihan di Pusdiklat BATAN

ABSTRAK Telah dilakukan analisis terhadap evaluasi program pelatihan Pusdiklat BATAN. Sampel data diambil dari pelaksanaan pelatihan pada Triwulan III tahun 2013 dengan 5 pelatihan yang telah dilakukan yaitu pelatihan: Tanggap Darurat, Pengkajian Dosis, ITN Guru SMA (II), Proteksi Fisik I untuk Medik dan Pengelolaan Limbah Radioaktif. Hasil analisis digunakan untuk perbaikan pelatihan yang akan datang. Analisis dilakukan terhadap hasil evaluasi pada semua komponen program pelatihan yang memiliki nilai pencapaian target mutu kurang dari 70% atau yang memiliki banyak keluhan pelanggan. Berdasarkan hasil analisis evaluasi program pelatihan dengan nilai komponen program kurang dari 70% adalah pelatihan Pengkajian Dosis. Pelatihan yang memiliki banyak keluhan pelanggan pada komponen program adalah pelatihan Tanggap Darurat, ITN Guru SMA (II), Proteksi Fisik I, Pengelolaan Limbah Radioaktif.   ABSTRACT Training program evaluation analysis in the Center for Education and Training - BATAN has been done. Data are taken from 5 training courses in third Quarter of 2013, i.e. Emergency Response Training Course, Dose Assessment Training Course. Nuclear Technique Introduction for Senior High School Teacher II Training Course and Physic Protection 1 for Medical and Radioactive Waste Management Training Course. The result of the analysis is used for maintaining the next training course. Analysis has been done for all training program components which have quality less than 70% or have a 10/ of customer complaints. Based on the training program evaluation result with program component's grade less than 70% is Dose Assessment Training Course. Training courses which has a lot of customer complaints are Emergency Response Training Course, Nuclear Technique Introduction for Senior High School Teacher II Training Course and Physic Protection 1 for Medical and Radioactive Waste Management Training Course.

Analisis Butir dan Pembuatan Bank Soal

ABSTRAK Untuk mengetahui soal ujian yang baik atau bermutu dilakukan analisis butir soal dan soal yang baik dapat dimasukkan ke dalam bank soal. Analisis menggunakan metode kualitatif dan kuantitatif terhadap sampel 5 buah soal ujian materi Umum (General) pada pelatihan radiografi Level 1 di Pusdiklat BATAN tanggal 9 — 23 Februari 2009. Sampel soal dilihat kesesuaiannya terhadap aspek materi, konstruksi, bahasa/budaya (kualitatif) dan hasil pengolahan data empirik butir soal tersebut (kuantitatif). Berdasarkan analisis kualitatif soal nomor 30 sesuai dengan semua aspek, sedangkan soal nomor 21, 26, 30,31 dan 36 belum sesuai dengan ketiga aspek analisis kualitatif. Untuk hasil analisis kuantitatif soal direvisi nomor: 21, soal baik nomor 26 dan 36, dan soal didrop (dibuang) nomor: 30 dan 31 didrop. Dari hasil analisis kualitatif dan kuantitatif dapat disimpulkan bahwa soal ujian belum baik sehingga belum dapat dimasukkan ke dalam bank soal.   ABSTRACT To find a good examination questions, has been done an analysis of questions and from the results, the good questions will be incorporated into the question bank. Analysis was performed using qualitative and quantitative methods against 5 questions from the General examination of Radiography Level 1 Training Course, which be held on February 9 to 23, 2009. The questions were reviewed for the compliance to the aspects of materials, construction, language / culture (qualitative) and the processing of the empirical data (quantitative). Based on the qualitative analysis, questions no. 30 fulfilled all aspects to be reviewed, and question number 21, 26, 3031, and 36 did not fulfilled the third aspect of qualitative analysis. From the qualitative and quantitative analysis results, it can be concluded that the questions were not good enough to be put into the question bank.

Analisis Evaluasi Program Pelatihan di Pusdiklat BATAN

ABSTRAK Telah dilakukan analisis terhadap evaluasi program pelatihan Pusdiklat BATAN. Sampel data diambil dari pelaksanaan pelatihan pada Triwulan III tahun 2013 dengan 5 pelatihan yang telah dilakukan yaitu pelatihan: Tanggap Darurat, Pengkajian Dosis, ITN Guru SMA (II), Proteksi Fisik I untuk Medik dan Pengelolaan Limbah Radioaktif. Hasil analisis digunakan untuk perbaikan pelatihan yang akan datang. Analisis dilakukan terhadap hasil evaluasi pada semua komponen program pelatihan yang memiliki nilai pencapaian target mutu kurang dari 70% atau yang memiliki banyak keluhan pelanggan. Berdasarkan hasil analisis evaluasi program pelatihan dengan nilai komponen program kurang dari 70% adalah pelatihan Pengkajian Dosis. Pelatihan yang memiliki banyak keluhan pelanggan pada komponen program adalah pelatihan Tanggap Darurat, ITN Guru SMA (II), Proteksi Fisik I, Pengelolaan Limbah Radioaktif.   ABSTRACT Training program evaluation analysis in the Center for Education and Training - BATAN has been done. Data are taken from 5 training courses in third Quarter of 2013, i.e. Emergency Response Training Course, Dose Assessment Training Course. Nuclear Technique Introduction for Senior High School Teacher II Training Course and Physic Protection 1 for Medical and Radioactive Waste Management Training Course. The result of the analysis is used for maintaining the next training course. Analysis has been done for all training program components which have quality less than 70% or have a 10/ of customer complaints. Based on the training program evaluation result with program component's grade less than 70% is Dose Assessment Training Course. Training courses which has a lot of customer complaints are Emergency Response Training Course, Nuclear Technique Introduction for Senior High School Teacher II Training Course and Physic Protection 1 for Medical and Radioactive Waste Management Training Course.

Analisis Butir dan Pembuatan Bank Soal

ABSTRAK Untuk mengetahui soal ujian yang baik atau bermutu dilakukan analisis butir soal dan soal yang baik dapat dimasukkan ke dalam bank soal. Analisis menggunakan metode kualitatif dan kuantitatif terhadap sampel 5 buah soal ujian materi Umum (General) pada pelatihan radiografi Level 1 di Pusdiklat BATAN tanggal 9 — 23 Februari 2009. Sampel soal dilihat kesesuaiannya terhadap aspek materi, konstruksi, bahasa/budaya (kualitatif) dan hasil pengolahan data empirik butir soal tersebut (kuantitatif). Berdasarkan analisis kualitatif soal nomor 30 sesuai dengan semua aspek, sedangkan soal nomor 21, 26, 30,31 dan 36 belum sesuai dengan ketiga aspek analisis kualitatif. Untuk hasil analisis kuantitatif soal direvisi nomor: 21, soal baik nomor 26 dan 36, dan soal didrop (dibuang) nomor: 30 dan 31 didrop. Dari hasil analisis kualitatif dan kuantitatif dapat disimpulkan bahwa soal ujian belum baik sehingga belum dapat dimasukkan ke dalam bank soal.   ABSTRACT To find a good examination questions, has been done an analysis of questions and from the results, the good questions will be incorporated into the question bank. Analysis was performed using qualitative and quantitative methods against 5 questions from the General examination of Radiography Level 1 Training Course, which be held on February 9 to 23, 2009. The questions were reviewed for the compliance to the aspects of materials, construction, language / culture (qualitative) and the processing of the empirical data (quantitative). Based on the qualitative analysis, questions no. 30 fulfilled all aspects to be reviewed, and question number 21, 26, 3031, and 36 did not fulfilled the third aspect of qualitative analysis. From the qualitative and quantitative analysis results, it can be concluded that the questions were not good enough to be put into the question bank.

Behaviors of Pipe-Soil Interaction on Unstable Slopes by Finite Element Simulation

Pipe-soil interaction plays an important role to the pipe stress analysis subjected to soil movement due to slope instability and/or slope failure. As the soils / slopes begin to fail, a single pipe or a group of pipes buried inside failure zone will bear additional loads which frequently lead to overstress or buckling. To study this phenomena, a case study was carried out by modelling a group of pipes subjected to ground movement in lateral direction. ABAQUS, a finite element software was employed to establish a 3 D numerical model of pipe-soil interaction during landslide event. Discussions of the results of this analysis are presented by focusing on the behaviors of displacement and stress of the pipes due to slope failure. Based on the analysis results, the length of failure zone becomes the major cause of the location of maximum stress during slope failure, it should be assessed carefully

Case Study on Soft Soil Improvement Using Innovative and Cost-Effective Reinforcing Techniques

This paper describes, discusses and compares three new innovations of reinforcement systems for soft soils: (a) a combination of gridded matrass and piles of bamboo, (b) a combination of matrass and piles of bamboo, and (c) a group of mini piles connected by small H-beams with a compacted top layer to hold the top mini piles. First, illustrations and applications of the three types of reinforcement are described from three full-scale field works. Technical bases for the three types are presented, while technical comparisons are discussed next. Finally, conclusions are developed. The case studies, analysis results, and full-scale fieldwork verifications show that the three reinforcement systems have worked properly. Each system has its own advantages and disadvantages in terms of construction duration and cost, capability/effectiveness and material availability, especially in rural areas

Finite Element Simulation of Vacuum Preloading at Palembang – Indralaya Toll Project

Methods for the prediction of soil behavior during the application of vacuum preloading are available but have not been used precisely and have not been proven yet in Indonesia. There are two common approaches to vacuum preloading simulation, based on the application of a uniform external load to the vacuum area, and based on suddenly lowering the groundwater level to create vacuum conditions, respectively. This affects the settlement, lateral deformation, and pore pressure predictions. The objective of this research was to improve the prediction of soil behavior based on high-quality field data by using state of the art vacuum preloading simulations. The results were compared with those of a series of instrumentation equipment, i.e. a settlement plate, an extensometer, and a piezometer. This research used data from the Palembang-Indralaya Toll Road, a section of the Trans Sumatera Toll Road that is approximately 22 km long and has an embankment height of about 4 m to 9 m. It was built over a swampy soft soil area, using vacuum preloading to improve the soil. Axisymmetric analysis of vacuum preloading was conducted for a single-drain system, plane-strain analysis was conducted for single- and multiple-drain systems, and 3D analysis was conducted for single-drain, multiple-drain, and cluster-drain systems. The results show that the proposed method produced a good correlation between the predicted data and the recorded monitoring data

Finite Element Simulation of Vacuum Preloading at Palembang – Indralaya Toll Project

Methods for the prediction of soil behavior during the application of vacuum preloading are available but have not been used precisely and have not been proven yet in Indonesia. There are two common approaches to vacuum preloading simulation, based on the application of a uniform external load to the vacuum area, and based on suddenly lowering the groundwater level to create vacuum conditions, respectively. This affects the settlement, lateral deformation, and pore pressure predictions. The objective of this research was to improve the prediction of soil behavior based on high-quality field data by using state of the art vacuum preloading simulations. The results were compared with those of a series of instrumentation equipment, i.e. a settlement plate, an extensometer, and a piezometer. This research used data from the Palembang-Indralaya Toll Road, a section of the Trans Sumatera Toll Road that is approximately 22 km long and has an embankment height of about 4 m to 9 m. It was built over a swampy soft soil area, using vacuum preloading to improve the soil. Axisymmetric analysis of vacuum preloading was conducted for a single-drain system, plane-strain analysis was conducted for single- and multiple-drain systems, and 3D analysis was conducted for single-drain, multiple-drain, and cluster-drain systems. The results show that the proposed method produced a good correlation between the predicted data and the recorded monitoring data

Evaluation of Lateral and Axial Deformation for Earth Pressure Balance (EPB) Tunnel Construction Using 3 Dimension Finite Element Method

Mass Rapid Transit Jakarta (MRTJ) phase 1 tunnel construction using the earth pressure balance method has been completed and surface settlement and lateral displacement data according to elevation and inclinometer readings has been collected to evaluate the effect of tunnel’s construction on surrounding infrastructure. Soil stratification along the research area, defined according to boring logs and soil parameters for the hardening soil model (HSM) and the soft soil model (SSM), was determined by optimization of stress-strain curve fitting between CU triaxial test, consolidation test and soil test models in the Plaxis 3D software. Evaluation of the result of surface settlement measurements using an automatic digital level combined with geodetic GPS for elevation and position control points showed that the displacement behavior was affected by vehicle load and stiffness of the pavement. Lateral displacement measurements using inclinometers give a more accurate result since they are placed on the soil and external influences are smaller than surface settlement measurement. The result of 3D finite element modeling showed that surface settlement and lateral displacement during TBM construction can be predicted using HSM with 2% contraction. SSM and the closed-form solutions of Loganathan and Poulos are unable to provide a good result compared to the actual displacement from measurements