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Perencanaan Jembatan Komposit Bentang 50 M Desa Kecapi Kecamatan Tahunan Kabupaten Jepara Khotibul Umam; Yayan Adi Saputro; Maulana Anwar Safi’i; Tira Roesdiana; Mochammad Qomaruddin
Teknika Vol 18, No 2 (2023): Oktober
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/teknika.v18i2.7812

Abstract

Upaya dalam meningkatkan mobilisasi masyarakat perlu adanya pembangunan sarana dan prasarana perhubungan yang memadai sejalan dengan pertumbuhan teknologi dan industri. Masalah yang sering terjadi dalam pembangunan jalan raya terutama pembangunan jalan raya di Dukuh Ngesing RT 21 RW 04 dan Dukuh Telahap RT 09 RW 02 Desa Kecapi terhalangnya oleh rintangan berupa sungai sehingga perlu dibangun bangunan penghubung seperti jembatan. Tahapan perencanaan diawali dengan survey pendahuluan, Perencanaan struktur atas jembatan dan Perencanaan struktur bawah jembatan. Hasil yang diperoleh dari perencanaan struktur atas jembatan menggunakan pipa sandaran 3 inch. Sandaran pipa panjang 20 cm lebar 15 cm tinggi 100 cm dengan tulangan D10-100 mm dan D10-150. Lantai trotoar lebar 70 cm tebal 20 cm dengan tulangan D12-200 mm dan D12-200. Lantai kendaraan lebar 7,4 m tebal 20 cm dengan susunan tulangan atas bawah D22-250 mm  dan D16-450 mm. Gelagar Memanjang (Girder) dengan dimensi WF 850.300.39.19 dan Gelagar Melintang (Diafragma) dengan dimensi WF 250.125.9.6. Untuk struktur bawah jembatan menggunakan pier dengan dimensi panjang 7,5 m tinggi 7,5 m lebar 1,75 m susunan tulangan D32 – 120 mm, D25 – 170 mm, dan tulangan hoops D13-500 mm, pile cap dengan dimensi panjang 11 m tinggi 1,5 m lebar 7 m susunan tulangan atas bawah D32 – 300 mm, dan D28 – 150 mm. Pada mutu beton pier dan pile cap menggunakan kuat tekan pada f’c 30 MPa dan mutu besi tulangan pada fy 400 MPa. Tiang pancang dengan mutu beton f’c 30 MPa diameter 40 cm membutuhkan 8 tiang dengan kedalaman sesuai perhitungan dan hasil sondir.  
Pelatihan Pemanfaatan Software Geogebra dalam Pembelajaran Matematika pada MGMP Matematika Ahmat Wakit; Lilik Sulistyo; Khotibul Umam; Ariyanto Ariyanto; Decky Rochmanto
Jurnal Pengabdian KOLABORATIF Vol. 2 No. 1 (2024): January
Publisher : Faculty of Engineering, Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/jpk.v2i1.8365

Abstract

The Mathematics Subject Teacher Meeting (MGMP) at KKMA 02 Jepara is routinely held at least 3 times in a semester, namely at the beginning before learning begins, in the middle, and at the end of the semester. The routine activities carried out are discussing textbooks and worksheets, setting up learning traps, and preparing for the preparation of Mid-Semester Examination questions and Final Semester Examination questions. However, in the last few semesters, the Mathematics MGMP is rarely held, even in this semester there is only 1 meeting and there is no more meeting agenda. This is due to several factors such as the level of saturation because the activities carried out are the same, never innovative activities that are in nature to improve the abilities and skills of teachers such as training, this encourages community service programs to be held with the theme "Utilization of Geogebra software in learning mathematics". This activity is a training for teachers who are members of the Mathematics MGMP regarding the importance of Geogebra software in learning mathematics. The method used is lectures and discussions from presenters from UNISNU Jepara and continued with simulations. The results of this activity are increased teacher knowledge and skills in designing learning media and implementing Geogebra software-based mathematics learning. It is hoped that by increasing teacher skills in developing innovative learning media, the learning atmosphere in the classroom will be enjoyable and student interest and motivation in learning will increase.
Inisiasi Dan Bantuan Dalam Pra Desain Dinding Penahan Tanah Untuk Sekolah Asrama Islam Nor Hidayati; Desti Setiyowati; Khotibul Umam; Fathinatul Labibah; Mahendra Hamid Arrafi; Mochammad Qomaruddin; Supot Rattanapun
Diteksi : Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 1 (2026): Diteksi, Vol. 4, No. 1, Mei 2026
Publisher : Fakultas Teknik Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/diteksi.v4i1.25340

Abstract

Daruttauhid Islamic Boarding School, located in Jepara, is located in a landslide-prone area due to its position at the foot of a steep cliff with a height of about 14 meters and only about 3 meters from the slope. On March 17, 2024, a landslide occurred which caused damage to several buildings inside the Islamic boarding school and increased the threat to the safety of students. This situation prompted the community service team from the Civil Engineering Study Program of UNISNU Jepara to carry out community service activities in the form of an initial design of a retaining wall. This initiative aims to provide technical solutions in addressing disaster risks and strengthening the institutional capacity of Islamic boarding schools in sustainable infrastructure planning. The implementation was carried out through a participatory approach, which included field surveys, slope stability analysis, geometric design of retaining walls, creation of engineering drawings, and dissemination of results to Islamic boarding school stakeholders. The outputs of this program include: technical design documents, scientific publications, media coverage, project implementation videos, and intellectual property rights registration. It is hoped that this program will reduce the potential for landslides, increase partners' understanding of the importance of retaining wall infrastructure, and support the roadmap of Nahdlatul Ulama Islamic University (UNISNU) Jepara for disaster mitigation, sustainable infrastructure, and the application of appropriate technology.