Analisis Daya Dukung Tiang Bor (Bored Pile) Pada Struktur Pylon Jembatan Soekarno Dengan Plaxis 3d

All construction is engineered for resting on the ground should be supported by a foundation. Foundation serves as the support of the building and continue building loads on it to ground layer sufficient carrying capacity. In planning the foundation on the bridge pylon Dr. Ir. Soekarno used types of foundation pile (bored pile) because the structure of the soil at the location of the pylon is generally composed of loose sand soil or soft clay. In analyzing the bearing capacity of the foundation pile (bored pile) used two ways namely static and PLAXIS 3D. Static way a correlation analysis calculations using formulas that already exist or that are generally often used. While PLAXIS 3D is a finite element program for geotechnical applications where land use models to simulate the behavior of soil. Results of capacity analysis by means of static and Plaxis 3D produces the best configuration is setup in a way satis I. Analysis: N = 17.563 tonnes, Q = 4.329 tons, M = 6.615 ton-m, S = 0.087 m, Yo = 0.044 m. While the analysis with Plaxis 3D: N = 14.320 tonnes, Q = 25.800 tons, M = 5.340 ton-m, S = 0.025 m, Yo = 0.023 m

Analisis Daya Dukung Tiang Pancang Dengan Menggunakan Metode Statik Dan Calendring Studi Kasus : Proyek Pembangunan Manado Town Square 3

Pemakaian alternative metode dalam mencari nilai daya dukung tiang sangat beragam, dengan menggunakan berbagai data paremeter tanah. Coduto (1994) membagi 3 (tiga) untuk mendukung Daya Dukung Pondasi tiang diantaranya yaitu metode Static (Menggunakan prinsip –prinsip mekanika tanah klasik), Dinamic dan loading test (uji beban skala penuh). Beberapa metode yang dibahas dalam perhitungan daya dukung tiang diantaranya dengan cara statik dan calendring, untuk metode statik menggunakan data triaxial, N-SPT dan Sondir. Rumus umum yang digunakan untuk mencari daya dukung dengan metode statik yaitu Qu = Qb + Qs dengan menjumlahkan tahanan ujung (Qb) dan tahanan samping (Qs). Pengujian calendring didasarkan atas perlawanan tanah terhadap tumbukan tiang. Pengujian ini ditujukan untuk penghentian pemukulan dikarenakan tiang sudah tidak mengalami perlawanan penetrasi sehingga perlu dilakukan uji calendring untuk mendapatkan daya dukung tiang. Hasil daya dukung antara cara statik akan dibandingkan dengan pengujian calendring. Hasil nilai daya dukung tiang dengan menggunakan data triaxial pada metode Meyerhof sebesar 38,76 ton dan U.S Army Corps sebesar 56,27. Perubahan nilai daya dukung tiang akibat pengaruh pemancangan, untuk Metode Meyerhof sebesar 74,17 ton dan U.S. Army Corps sebesar 105,90 ton. Penggunaan data SPT dalam mencari nilai daya dukung tiang dibagi menjadi dua metode, untuk Metode Meyerhof daya dukung tiang sebesar 69,88 ton dan metode Briaud et al 124,99 ton. Hasil daya dukung tiang dengan menggunakan data sondir, untuk Metode Meyerhof sebesar 96,21 ton dan Metode Schmertmann & Nottingham sebesar 90,1320 ton. Daya dukung tertinggi ada pada uji calendring dengan metode hiley sebesar 272,83 ton. Penurunan tertinggi sebesar 0,4 inch dan struktur dapat dikategorikan sebagai Reinforced concrete structure, Brick walls high story, Machine operation dengan batas penurunan maksimum antara 1-3 inch. Hasil dari setiap metode diambil daya dukung tiang terendah untuk mewakili setiap metode

Hubungan Kuat Geser Pada Tanah Dengan Hasil Percobaan Dynamic Cone Penetrometer Pada Ruas Jalan Wori-likupang Kabupaten Minahasa Utara

Dynamic Cone Penetrometer (DCP) test has been done in Indonesia on the geotechnical and transportation field, to evaluate the properties of flexible pavement or subgrade. Some research that have been done for example, are producing a correlation between CBR and DCP in some types of soil. The use of DCP, a relatively inexpensive, and can be done repeatedly, also have been developed for practical applications, such as generating approximate shear strength in the field (in situ). In this research at 5 points of examination on the road Wori-Likupang North Minahasa regency, the relationship between the shear strength on the field from the use of the DCP with the shear strength from triaxial testing equipment on laboratory is calculated. The result obtained is 4 points almost has the same value, so the use of a DCP for the determination of shear strength field can be used as a road construction planning data

PENGARUH STABILISASI SEMEN TERHADAP SWELLING LEMPUNG EKSPANSIF

ABSTRAKLempung Ekspansif merupakan lempung yang memiliki potensi kembang susut yang tinggi apabila terjadi perubahan kadar air. Bila suatu konstruksi dibangun diatas tanah ekspansif maka akan terjadi kerusakan-kerusakan pada konstruksi tersebut. Salah satu cara yang digunakan untuk mengatasi permasalahan tersebut adalah menstabilkan tanah dengan meningkatkan daya dukung tanah asli dan mengurangi kembang susutnya. Penambahan semen merupakan salah satu cara stabilisasi tanah ekspansif yang efektif, karena semen dapat mengikat mineral lempung menjadi padat, sehingga mengurangi kembang susut tanah lempung ekspansif.Pengujian ini bertujuan untuk mengetahui swelling berdasarkan nilai indeks plastisitas dan nilai daya dukung berdasarkan pengujian Kuat Tekan Bebas (UCT). Kadar air benda uji diambil dari hasil pemadatan proctor standar dengan variasi campuran semen 0%, 5%, 10%, 15%, dan 20%.Dari hasil pengujian diperoleh, lempung ekspansif yang di stabilisasi dengan semen pada variasi 0%, 5%, 10%, 15%, dan 20% menunjukkan adanya peningkatan nilai daya dukung tanah dan penurunan indeks plastisitas yang cukup signifikan. Pada campuran semen sebesar 20% terjadi peningkatan nilai daya dukung yang cukup tinggi yakni 767.01% dari daya dukung tanah asli, dan pada campuran semen sebesar 20% juga terjadi penurunan indeks plastisitas sebesar 56.4% dari indeks plastisitas tanah asli. Semakin kecil indeks plastisitas, nilai daya dukung semakin besar.Kata kunci : lempung ekspansif, stabilisasi semen, pemadatan, UC

Pelatihan Peningkatan Self-Esteem pada Mahasiswa Universitas Indonesia yang Mengalami Distres Psikologis

Undergraduate students with high levels of self-esteem tend to have good adjustments in lectures. They will have the ability to deal with college problems and automatically reduce their psychological distress. This study used a quasi experimental method which is conducted to determine the increase of self-esteem in students who experience psychological distress. Participants of this study were 8 undergraduate students from Universitas Indonesia aged 18-23 years with a level of self-esteem below the value of 29 as measured by Rosenberg self-esteem scale (RSES), and had a level of psychological distress above the value of 1.75 as measured by HSCL-25. Participants were involved in the intervention of increasing self-esteem consisting of 5 main sessions for two consecutive days (about 6 hours a day). Four weeks after the second day of training, the participant's level of self-esteem and psychological distress were measured. The result of pre and posttest intervention showed that the participant’s mean score of self-esteem increased and the mean score of psychological distress decreased. The result of Wilcoxon test also showed a significant change in both variables (Z RSES = -2.246; Z HSCL-25 = -2.366; p < .05). This study shows that training intervention is effective in increasing the level of self-esteem and reducing the level of psychological distress for undergraduate students at Universitas Indonesia. Participants also commented that they gained new knowledge about self-esteem and new skills to communicate assertively and think positively.Mahasiswa dengan tingkat self-esteem yang tinggi cenderung memiliki penyesuaian yang baik di perkuliahan. Mereka akan memiliki kemampuan untuk menangani masalah kuliah dan secara otomatis mengurangi distres psikologis mereka. Penelitian ini menggunakan metode eksperimental kuasi yang dilakukan untuk mengetahui peningkatan self-esteem pada mahasiswa yang mengalami distres psikologi. Partisipan penelitian ini adalah 8 mahasiswa S1 Universitas Indonesia yang berusia 18-23 tahun dengan tingkat self-esteem di bawah nilai 29 yang diukur dengan Rosenberg self-esteem scale (RSES), dan memiliki tingkat distres psikologi di atas nilai 1.75 yang diukur dengan HSCL-25. Partisipan terlibat dalam intervensi peningkatan self-esteem yang terdiri dari 5 sesi utama selama dua hari berturut-turut (sekitar 6 jam dalam sehari). Empat minggu setelah hari kedua pelatihan, tingkat self-esteem dan distres psikologis responden diukur. Hasil pengukuran sebelum dan sesudah intervensi pelatihan menunjukkan bahwa skor mean self-esteem peserta mengalami peningkatan dan skor mean distres psikologis mengalami penurunan. Hasil uji Wilcoxon juga menunjukkan perubahan yang signifikan pada kedua variabel (Z RSES = -2.246; Z HSCL-25 = -2.366; p < .05). Penelitian ini menunjukkan bahwa intervensi pelatihan efektif dalam meningkatkan self-esteem dan menurunkan distres psikologis bagi mahasiswa S1 Universitas Indonesia. Peserta juga berkomentar bahwa mereka memperoleh pengetahuan baru mengenai self-esteem dan keterampilan baru untuk berkomunikasi secara asertif dan berpikir positif

Police’s and victim care officers’ beliefs about memory and investigative interviewing with children: survey findings from Malaysia

Years of psychological research has demonstrated that the use of investigative interviewing methods based on up-to-date scientific evidence is important to ensure the reliability of child witnesses’ statements. Ideally, professionals working with children are equipped with knowledge of memory functioning, as erroneous beliefs may impact how they handle cases of alleged abuse. Fifty police officers and 23 victim care officers serving the Royal Malaysian Police completed a 20-statement questionnaire assessing beliefs about memory functions and child investigative interviewing. The police sample also read a child sexual abuse case vignette and listed the questions they would ask the alleged victim in an investigative interview. Consistent with findings from other parts of the world, the beliefs of child protection professionals were not always in line with the latest memory research. Directive-type questions were used more than option-posing and suggestive questions. Findings are considered in relation to variations in culture and legal systems

HUBUNGAN KUAT GESER PADA TANAH DENGAN HASIL PERCOBAAN DYNAMIC CONE PENETROMETER PADA RUAS JALAN WORI-LIKUPANG KABUPATEN MINAHASA UTARA

ABSTRAK Uji Dynamic Cone Penetrometer (DCP) sudah banyak dilakukan di Indonesia dalam bidang geoteknik dan transportasi, untuk mengevaluasi sifat-sifat tanah dasar ataupun perkerasan lentur.Penelitian yang sudah pernah dilakukan menghasilkan adanya korelasi nilai antara CBR dan DCP di beberapa jenis tanah.Penggunaan alat DCP yang mudah, relatif murah, dan dapat dilakukan berulang-ulang ini, juga telah dikembangkan untuk aplikasi-aplikasi yang praktis, seperti menghasilkan perkiraan kuat geser di lapangan (insitu). Dalam penelitian ini pada 5 titik pengujian di ruas jalan Wori-Likupang Kabupaten Minahasa Utara, hubungan antara kuat geser lapangan yang dihasilkan dari penggunaan alat DCP dengan kuat geser laboratorium dengan alat uji Triaksial menghasilkan 4 data dengan nilai yang hampir sama, sehingga penggunaan alat DCP untuk penentuan kuat geser lapangan dapat dipakai sebagai suatu data perencanaan konstruksi jalan. Kata kunci: Kuat Geser, Tanah, Dynamic Cone Penetrometer, Triaksial UU.ABSTRACT Dynamic Cone Penetrometer (DCP) test has been done in Indonesia on the geotechnical and transportation field, to evaluate the properties of flexible pavement or subgrade. Some research that have been done for example, are producing a correlation between CBR and DCP in some types of soil. The use of DCP, a relatively inexpensive, and can be done repeatedly, also have been developed for practical applications, such as generating approximate shear strength in the field (in situ). In this research at 5 points of examination on the road Wori-Likupang North Minahasa regency, the relationship between the shear strength on the field from the use of the DCP with the shear strength from triaxial testing equipment on laboratory is calculated. The result obtained is 4 points almost has the same value, so the use of a DCP for the determination of shear strength field can be used as a road construction planning data. Keywords: Shear Strength, Soil, Dynamic Cone Penetrometer, unconsolidated undrained triaxial

HUBUNGAN NILAI CBR LABORATORIUM DAN DCP PADA TANAH YANG DIPADATKAN PADA RUAS JALAN WORI–LIKUPANG KABUPATEN MINAHASA UTARA

ABSTRAK Cara uji Dynamic Cone Penetrometer (DCP). merupakan suatu prosedur yang cepat untuk melaksanakan evaluasi kekuatan tanah dasar dan lapis pondasi jalan dengan biaya yang relatif kecil. Tulisan ini membahas hubungan nilai CBR laboratorium dan DCP pada tanah yang dipadatkan di ruas jalan Wori–Likupang Kabupaten Minahasa Utara. Dari hasil analisa data pada lima tempat yang berbeda baik di lapangan maupun di laboratorium, diperoleh 4 titik penelitian yang memiliki nilai hampir sama yaitu pada STA 28+200, STA 28+300, STA 28+400 dan STA 29+000, sehingga penggunaan alat DCP untuk penentuan CBR tanah (CBR perkiraan awal) di lapangan di Ruas Jalan Wori-Likupang dapat dipakai sebagai suatu data perencanaan konstruksi jalan tanpa harus melakukan pengujian CBR lebih lanjut di laboratorium. Kata kunci:DCP, CBR, CBR Lapangan, CBR Laboratorium, tanah, pemadatan tanah.ABSTRACT Dynamic Cone Penetrometer (DCP) test method is a fast procedure to carry out the evaluation of subgrade strength and the foundation layer with a relatively small cost. This research examines the relationship of laboratory CBR and DCP values on compacted soil in road Wori-Likupang North Minahasa regency. From the analysis of the data at five different places both in the field and in the laboratory the results obtained 4 points of research that has almost the same value at STA 28+200, STA 28+300, STA 28+400 and STA 29+000, so the use of a DCP for the determination of CBR soil (CBR preliminary estimates) in the field at Wori-Likupang road can be used as a road construction planning data without having to perform further CBR testing in the laboratory. Keywords:DCP, CBR, CBR Field, CBR Laboratories, soil, soil compaction

Urgent issues and prospects at the intersection of culture, memory, and witness interviews: Exploring the challenges for research and practice

Funder: UK Home Office and security and intelligence agenciesFunder: KU Leuven; Id: http://dx.doi.org/10.13039/501100004040Funder: FWO Research ProjectAbstract: The pursuit of justice increasingly relies on productive interactions between witnesses and investigators from diverse cultural backgrounds during investigative interviews. To date, the role of cultural context has largely been ignored by researchers in the field of investigative interviewing, despite repeated requests from practitioners and policymakers for evidence‐based guidance for the conduct of interviews with people from different cultures. Through examining cultural differences in human memory and communication and considering specific contextual challenges for investigative interviewing through the lens of culture, this review and associated commentaries highlight the scope for considering culture and human diversity in research on, and the practice of, investigative interviewing with victims, witnesses, and other sources. Across 11 commentaries, contributors highlight the importance of considering the role of culture in different investigative interviewing practices (e.g., rapport building, questioning techniques) and contexts (e.g., gender‐based violence, asylum seeking, child abuse), address common areas of cultural mismatch between interviewer–interviewee expectations, and identify critical future routes for research. We call for an increased focus in the investigative interviewing literature on the nature and needs of our global community and encourage constructive and collaborative discussion between researchers and practitioners from around the world to better identify specific challenges and work together towards evidence‐based solutions

Improving PBL in Empowering Meta cognitive Skill of Students

Abstract Objective: Problem-Based Learning (PBL) is a potential constructivist learning strategy that empowers students’ Meta cognitive skill. PBL focuses on problem, involves thinking activity to solve problems, and correlates to cognitive function of students. Methods: The implementation of PBL reveals various benefits, but there are also some weaknesses in this learning strategy. Thus, it is necessary to implement a certain learning strategy that can cover the PBL weaknesses, such as Reading, Questioning, and Answering (RQA) learning strategy. RQA is a new learning strategy developed based on a fact that almost all students do not read the next lecture materials, causing failure of learning strategy planned and finally the students’ comprehension becomes low. RQA is also potential to empower students’ Meta cognitive skill. Findings: The integration of RQA and PBL learning strategy is called PBL-RQA learning strategy. This study was a quasi-experimental study designed to compare the effect of PBL, RQA, and PBL-RQA learning strategies on the students’ Meta cognitive skill of Faculty of Mathematics and Science, State University of Makassar. Application: The results of the study showed that the potency of PBL learning strategy in empowering the students’ Meta cognitive skill has been increased by integrating it to RQA learning strategy. The meta cognitive skill mean score of the students taught by PBL-RQA learning strategy was 21% higher than that of the students taught by PBL and 26.9% higher than that of the students taught by RQA learning strategy. Keywords: Answering, Meta Cognitive Skill, Problem-Based Learning, Questioning, Reading, PBL-RQ