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Mencegah Kelongsoran dengan Meningkatkan Angka Keamanan Lereng Rahmawati, Apriliya Laily; Candra, Agata Iwan; Sefiyanti, Redyka; Husna, Nadiya; Febrian, Bagas
CIVED Vol. 10 No. 2 (2023): June 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i2.402

Abstract

Kecamatan Pujon merupakan daerah dengan intensitas bencana longsor cukup tinggi. Tanah longsor terjadi di Dusun Sukomulyo, Kabupaten Malang dipengaruhi oleh minimumnya vegetasi berakar dan tingginya intensitas curah hujan yang berdampak negatif bagi masyarakat sekitar. Tujuan penelitian ini untuk menganalisis kestabilan lereng dengan dilakukan pengujian untuk menentukan nilai atterberg limit, gradasi ayakan, uji kuat geser, analisis stabilitas lereng dan optimalisasi sudut kemiringan sebagai upaya penanganan risiko bencana tanah longsor. Penelitian ini menggunakan metode kuantitatif dengan pengujian di lapangan dan di laboratorium. Hasil penelitian menunjukkan bahwa tipe longsor daerah penelitian yaitu translasi slide. Didapatkan nilai plastic index 26,22 % dengan jenis tanah Sand Poorly Graded. Hasil Pengujian Geser menghasilkan sudut geser 3,12 dan kohesi 7,68 pada keadaan basah. Hal tersebut diketahui Nilai Fs<1 menunjukkan lereng kurang stabil, dengan cara melakukan pemotongan atau pelandaian lereng menjadi 16 derajat maka nilai factor of safety 1,04 FS >1 dinyatakan stabil. Penelitian ini dilakukan sebagai dasar awal dalam merencanakan kemiringan lereng yang stabil, sehingga terjadinya kelongsoran bisa diminimalkan.
Optimalisasi Kuat Tekan Beton Menggunakan Fly Ash dan Superplasticizer Rahmawaty, Fitry; Candra, Agata Iwan; Hidiyati, Evita Fitrianis; Cahyono, Andri Dwi; Mahardana, Zendy Bima; Karisma, Dwifi Aprillia; Ali, Mahardi Kamalika Khusna; Azhari, Faiz Muhammad
CIVED Vol. 10 No. 2 (2023): June 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i2.424

Abstract

Perekonomian Kota kediri yang meningkat menjadikan masyarakat antusias dalam berinvestasi di dunia perumahan. Dengan data dari Kepala Dinas Perumahan dan Kawasan Permukiman mengungkapkan bahwa Pemkot kediri juga telah menetapkan Rencana Detail Tata Ruang, dimana Sebagian wilayahnya diperuntukkan sebagai Kawasan perumahan dan pemukiman. Namun, masyarakat banyak beralih ke rumah bertingkat karena mampu meminimalisir lahan dan mendapatkan banyak ruang untuk anggota keluarga. Selain itu, rumah bertingkat harus didesain kokoh dan kuat agar mampu menopang beban baik beban mati maupun beban hidup dan beban-beban yang lain. Salah satu upaya memperkokoh bangunan dengan memperkuat struktur bangunannya seperti kolom dan balok. Penelitian ini bertujuan untuk meningkatkan kuat tekan beton tekan dengan penambahan fly ash (FA) dan superplasticizer (SP) dengan harapan dapat mengurangi penggunaan semen dengan mutu yang sama. Metode penelitian yang digunakan dalam penelitian ini adalah metode eksperimen dengan melakukan pengujian langsung di Laboratorium Teknik Universitas Sipil Kadiri yang mengacu pada SNI. Benda uji yang digunakan berbentuk silinder dengan ukuran 15 cm x 30 cm dengan lama pengerasan 3 hari, 7 hari, 14 hari dan 28 hari dengan kuat tekan rencana fc' 21,7 MPa. Hasil penambahan fly ash dan Superplastizer didapatkan nilai slump untuk variasi FA0%, FA4%+SP0.5%, FA8%+SP0.5% berturut-turut 13 cm, 8 cm, 6 cm dan 6 cm. Hasil penelitian pada variasi FA0%, FA4%+SP0.5%, FA8%+SP0.5%, menunjukkan kuat tekan rata-rata tertinggi terdapat pada variasi FA 8% + SP 0.5% yaitu sebesar 29.8 Mpa. Hasil penelitian menunjukan pengujian kuat tekan beton dengan penambahan fly ash dan superplasticizer mendapatkan hasil kuat tekan terbesar pada campuran beton variasi fly ash 8% dan SP 0.5 % dengan umur beton 28 hari sebesar 32,8 Mpa setara dengan K-300. Hasil tersebut dapat diaplikasikan pada pekerjanaan Kolom dan Balok pada bangunan bertingkat.
Experimental Study of Soil Compaction with Proctor Standard Test Equipment Fatkunada, Nur Addin; Candra, Agata Iwan; Setiawan, Dodi
CIVED Vol. 11 No. 2 (2024): June 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i2.550

Abstract

Soil is the surface layer of the earth which consists of minerals, organic materials, air, living things. Clay soil is one type of soil that is important in determining the bearing capacity of subgrade required for construction. The bearing capacity of the soil is obtained by compacting it, using the TS-365 Automatic Standard Proctor. Soil compaction is the process of removing air from the pores of the soil, and is effective for improving soil properties in order to increase the density (density) of the soil so that shear strength increases, soil settlement decreases, and soil permeability decreases. The standard proctor test uses 5 separate soil samples weighing 2 kg, with a mixture of 16%, 19%, 22%, 25% and 28% air respectively. The test results show that the soil obtained from the Pojok sub-district area. Mojoroto, East Java obtained the results of soil compaction data using a standard proctor test, it was obtained that the optimum dry volume weight of the soil was 1,630 gr/cm3 and the optimum water content was 32%. So that the results of soil testing in the laboratory can be used as a reference for controlling soil compaction in construction.
Pembuatan masker dan bilik disinfektan sebagai upaya membantu masyarakat terdampak covid-19 Safi'i, Imam; Candra, Agata Iwan; Widodo, Silvi Rushanti; Santoso, Ariadi; Heryanto, Budi; Winarti, Eko; Rahmadi, Afif Nur
Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Vol 4 No 1 (2021)
Publisher : University of Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jipemas.v4i1.7524

Abstract

The spread of Covid-19 in Indonesia has begun to increase from April 2020, this is because there are still many people who have not implemented the prevention of transmission such as one of them using masks. Observations made at crowded places such as traditional markets found that many people do not use masks due to the scarcity of masks in the market. The methods of making the masks and disinfectant booths aims to help the community, especially in the Kediri region which was affected by the spread of Covid-19. The masks and disinfectant booth products are carried out independently by the Kadiri University in collaboration with the students, lecturers, and alumni of Kadiri University, where the products will be submitted as a form of social service to people in need such as the traditional market in Grogol Village, Kediri Regency. In addition to distributing masks to the public, also given education through socialization the importance of doing a form of prevention of the spread of Covid-19 by always washing hands regularly, keep a distance, and always use a mask.
Increasing The Bearing Capacity of Foundations on Sandy Soil with High Water Levels Using Mini-pile Moh. Ilham Farihi; Agata Iwan Candra; Dwifi Aprillia Karisma; Nur Addin Fatkunada; Malik Ibrahim; Bagas Naga Pratala Haryadi; Rahadi Reswara
Rekayasa Sipil Vol. 18 No. 2 (2024): Rekayasa Sipil Vol. 18 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2024.018.02.2

Abstract

In the Kediri Regency area, it is planned to build a 3-story shophouse as one of the supporting facilities and the community’s economic needs. This area has sandy soil conditions and a high-water table. The purpose of this study was to calculate the carrying capacity of the soil in constructing a 3-story shophouse using the Terzaghi, Mayerhof, and Hansen methods. The condition of the soil with a relatively high groundwater table made the implementation of the footplate foundation less effective, so a modification of the foundation was made, which added three mini-piles measuring 0.4x0.4x1.5m, with a design load supported by the foundation of 100 t/m². Calculations with the Mayerhof and Hansen methods have nearly identical results but have not fulfilled the planned load. At a foundation depth of up to 3 m with an SF value of 3, for the Terzaghi method: 107.75 t/m2, the Mayerhof method: 92.51 t/m2, and the Hansen method: 94.68 t/m2. The results can be used as an alternative in constructing a 3-story shophouse with sandy soil conditions and high groundwater levels. This research can also be a reference for other regions facing similar problems.
KEDELAI MENINGKATKAN DAYA DUKUNG FONDASI TELAPAK LINGKARAN Zaizafun Zakiya; Agata Iwan Candra; Mahardi Kamalika Khusna Ali
Jurnal Riset Rekayasa Sipil Vol 9, No 2 (2026): Maret 2026
Publisher : Civil Engineering Study Program, Engineering Faculty Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jrrs.v9i2.105478

Abstract

Tanah pasir lepas memiliki daya dukung rendah akibat porositas tinggi dan ikatan antarbutir yang lemah. Kondisi ini menjadi tantangan signifikan dalam perencanaan konstruksi fondasi dangkal, karena berisiko menyebabkan penurunan berlebih dan ketidakstabilan struktur. Penelitian ini bertujuan mengevaluasi efektivitas metode Enzyme-Induced Carbonate Precipitation (EICP) berbasis ekstrak kedelai dalam meningkatkan kapasitas daya dukung tanah tersebut. Perlakuan dilakukan satu kali dengan menyuntikkan 9 liter larutan EICP ke dalam media pasir menggunakan metode two-phase. Rasio larutan urease (dari ekstraksi bubuk kedelai) dan sementasi (1 mol/L urea dan 1 mol/L CaCl₂) adalah 1:1, dengan konsentrasi total 22,24% terhadap berat kering pasir. Pengujian meliputi uji beban statik aksial (ASTM D1194) dan uji geser langsung (ASTM D3080). Hasil menunjukkan bahwa kapasitas daya dukung ultimit meningkat sebesar 272,7% (uji aksial) dan 368,2% (perhitungan). Peningkatan sifat tanah juga terlihat dari nilai kohesi hingga 13,78 kPa, sudut geser dalam mencapai 57,16°, dan berat volume tanah naik dari 13,48 menjadi 18,00 kN/m³. Uji ANOVA (F(1,114) = 239,97; p < 0,001) mengonfirmasi pengaruh perlakuan yang signifikan secara statistik. Disimpulkan bahwa metode EICP berbasis kedelai efektif dalam memperbaiki sifat fisik dan mekanik tanah pasir lepas, serta meningkatkan daya dukung fondasi telapak lingkaran secara signifikan.
Pendampingan Penilaian Kelayakan Struktur Beton Bertulang Ruko 2 Lantai Menggunakan Uji Non-Destruktif: Penelitian Dwifi Aprillia Karisma; Agata Iwan Candra; Zendy Bima Mahardana
Jurnal Pengabdian Masyarakat dan Riset Pendidikan Vol. 4 No. 3 (2026): Jurnal Pengabdian Masyarakat dan Riset Pendidikan Volume 4 Nomor 3 (Januari 202
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jerkin.v4i3.5580

Abstract

Bangunan ruko beton bertulang banyak digunakan sebagai fasilitas kegiatan ekonomi masyarakat, sehingga pemantauan kondisi struktur secara dini diperlukan untuk menjaga keselamatan dan fungsi layan bangunan. Kegiatan pengabdian kepada masyarakat ini melakukan pendampingan kepada pemilik bangunan dalam penilaian kelayakan struktur beton bertulang pada ruko dua lantai menggunakan metode uji non-destruktif. Permasalahan mitra berupa lendutan balok dan retakan struktur. Metode pelaksanaan meliputi konsultasi teknis, investigasi visual, pengukuran lendutan dan retak, serta pengujian non-destruktif menggunakan hammer test. Hasil evaluasi menunjukkan lendutan balok 3,00–3,75 cm dan lendutan pelat 1,25–2,10 cm, disertai panjang retak balok 45–70 cm dan pelat 135–240 cm. Uji hammer test mengindikasikan kuat tekan beton relatif rendah, yaitu 16,8–18,2 MPa pada balok dan 17,7–18,1 MPa pada pelat. Pembongkaran sebagian menunjukkan tebal selimut balok 5,0–6,0 cm dan pelat 2,65–3,50 cm. Melalui pendampingan, mitra memperoleh pemahaman mengenai kondisi aktual struktur dan rekomendasi perbaikan berupa perbaikan retak, perkuatan lokal, serta pemantauan berkala untuk menjaga keamanan bangunan jangka panjang.
Theoretical Enhancement of Point Resistance in Sandy Soils Using Bio-Inspired Cranial Asperity Ratios Candra, Agata Iwan; Munawir, As'ad; Zaika, Yulvi; Suryo, Eko Andi
Civil Engineering Journal Vol. 12 No. 1 (2026): January
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-01-011

Abstract

This study aims to enhance the bearing capacity of pile foundations in sandy soils through a bio-inspired approach by modifying Meyerhof’s empirical equation using a cranial correction factor. The adjustment considers the geometric influence of the asperity length–height ratio (L/H 20, 26.67, and 33.33) applied to different pile diameters. The analysis was carried out theoretically by calculating point resistance (Qp) using the modified equation, followed by validation through ANOVA and the nonparametric Mann–Whitney test. The results indicate that an L/H ratio of 20 provides the most significant improvement in Qp, ranging from 11.7% to 465.8% compared to the conventional Meyerhof model, particularly at lower D/B ratios where stress concentration can be optimally mobilized. Larger ratios such as 26.67 and 33.33 also improve capacity, though less effectively than L/H 20, yet still outperform unmodified foundations. The correction factors obtained, ranging from Cᵣ 1.07 to 5.66, demonstrate the substantial contribution of geometric modification to load transfer efficiency. The novelty of this research lies in integrating anisotropic interface properties into the classical Meyerhof model, thereby bridging the gap between isotropic predictions and anisotropic experimental evidence. Accordingly, the developed theoretical framework not only strengthens the basis for calculating pile bearing capacity but also opens new avenues for bio-inspired foundation design that is more efficient and sustainable.
Peningkatan Akurasi Perhitungan Kapasitas Dukung Pondasi Strauss melalui Integrasi Profil Diameter Aktual Sepanjang Tiang Rosyta, Heni Agnes; Candra, Agata Iwan
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1218

Abstract

Vertical variability in layered soil profiles often influences the load-bearing performance of pile foundations, particularly for Strauss piles, which exhibit non-uniform diameters and are affected by manual drilling processes. This study aims to evaluate the relationship between depth, depth–diameter ratio (D/B), ultimate bearing capacity (Qu), and allowable bearing capacity (Qall) for B50 and B60 piles based on empirical estimations and field test results. The methodology includes cone penetration resistance (Qc) analysis, bearing capacity calculation using the Meyerhof approach, and field testing to obtain actual Qu and Qall values. The results show that bearing capacity increases with depth until approximately 4.0 m before changing at subsequent depths, with field-measured Qu values remaining lower than empirical predictions, exhibiting differences of 16.993% for B50 and 17.713% for B60. Allowable bearing capacity demonstrates a similar trend, where Meyerhof predictions consistently exceed field measurements. Analysis based on D/B ratios also reveals a consistent pattern of increasing capacity toward a critical ratio followed by changes at larger ratios. Overall, the findings indicate that depth and D/B ratio are dominant parameters controlling the bearing performance of Strauss piles in layered soil conditions.
INCREASING THE BEARING CAPACITY OF SQUARE FOUNDATIONS BASED ON SOYBEAN BIO-CEMENTATION Annas Dwi Safi'i; Agata Iwan Candra; Mahardika Kamalika Khusna Ali
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 14 No. 3 (2025): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v14i3.57680

Abstract

Sandy soils are commonly employed as the foundation for shallow footings. However, their relatively low bearing capacity often leads to excessive settlement and deformation. This study examines the potential application of the Enzyme-Induced Carbonate Precipitation (EICP) technique based on soybeans. Utilizing urease derived from soybeans to catalyze the crystallization of calcium carbonate (CaCO₃). This research investigates the impact of EICP-induced carbonate precipitation on the bearing capacity of sandy soil in square footings. 4 x 4 cm footing model was tested using the AIC-Innovation Loading Test apparatus. Direct shear additional tests were performed to assess differences in increase cohesion and shear angle. The results show 174.90% increase in bearing capacity, 73.47% reduction in settlement, 300.64% increase in cohesion from the shear test, and  202.46% increase from the loading test. The shear angle increased by 56.34%, and the dry unit weight increased by 36.5%. ANOVA analysis with a p-value of 2.03 × 10⁻¹⁵ < 0.05 confirmed that the increase in bearing capacity was not due to random variation but to the EICP treatment. These findings demonstrate that EICP proves to be a viable technique to enhance sandy soil and contributes to advancing of bio-cementation based on organic materials as a sustainable solution.
Co-Authors Abidatul Izzah Aditia, Trio Syiwa Aditiya Yayang Nurkafi Afif Nur Rahmadi Afif Nur Rahmadi, Afif Nur Afriyan Arsya Sabilla Agung Guncoro Ahmad Ridwan Ahmad Ridwan Ahmad Ridwan Ahmad Ridwan Ahmad Ridwan Ahmada Khotibul Umam Aldri Frinaldi Alfaridh Pasya, Salman Alfina Iskindaria Altara, Jecksindio Elten Alvin Hidayat Amanda Rizky F Anasrudin Yusuf Andri Dwi Cahyono Annas Dwi Safi&#039;i Annas Dwi Safi'i April Gunarto April Gunarto April Gunarto Ardinata Ardinata Ariadi Santoso Ariadi Santoso, Ariadi Arif Fathur Rohman Arif Rivianto Arif Rivianto Arthur Daniel Limantara, Arthur Daniel Ashabul Yamin Atsfiela Dzulkhan Qalby Bagas Naga Pratala Haryadi Bella Amiria Rahmahima Bima Mahardana, Zendy Budi Heryanto Budi Winarno Budi Winarno Candra Yulianto Dicko Mahendra Dikhy Ridho Laksono Dodi Setiawan Dwi Hartanto Dwi K, Mohamad Agus Dwifi Aprilia Karisma Dwifi Aprilia Kharisma Dwifi Aprillia Karisma Edy Gardjito, Edy Eko Andi Suryo Eko Siswanto Eko Siswanto Eko Winarti Elsa Rizqi Purwanti Evita Fitrianis Hidiyati Faiz Muhammad Azhari Fajar Romadhon Fajar Romadhon Fandra Andriansyah P Farikhatul Mufaidah Fatkunada, Nur Addin Fauzie Nursandah Fauzie Nursandah Febrian, Bagas Fianca Nimas Yamada Puteri Fidyan Mamlu&#039;atul Husna Fitry Rahmawaty Fransesco Indra Permana Friska Windi Meira Aisyah Galang Santoso Hadi Mashuri Hendy Hendy Hendy Henny Prasetiyo Heri Wahyudiono Herlan Pratikto Herlangga Duta Pramudya Hermawan Hermawan Hidiyati, Evita Fitrianis Hikmatul Lailiya Husna, Nadiya Ilham Rizqi Nurdian Putra Imam Mustofa Imam Safi'i Kavindo Yugiswara Hutama Khoirun Nisa&#039; Khoirun Nisa' Ki Catur Budi Ki Catur Budi Ki Catur Budi S Krisdiyanto Nugroho Leo Agusta Utama Lin Sintyawati M Ilham Fauzil Fahmi Mahardi Kamalika Khusna Ali Mahardika Kamalika Khusna Ali Mahardika, Rega Malik Ibrahim Ma’rifatul Mumayyizah Meylinda Vricilia Mishbahul Aziz Moch Aminuddin Moch. Risjad Aldiansyah Mochamad Rizki Mochammad Danara Indra Pradigta Moh. Idham Cholid Moh. Ilham Farihi Mohamad Agus Fajar Wibowo Mohammad Abdul Aziz Hanafi Mohammad Roziq Muchammad Sutikno Mudinillah, Adam Muhammad Bahrudin Muhammad Feggi Saputra Muhammad Heri Nastotok Muhammad Heri Nastotok Muhammad Lutfi Amzari Muhammad Nasih Al hasbi Muhammad Ridho Muhammad Rosyid Abdul Rohman Fauzy Muhammad Sulton Bahrudin Mukhammad Ibnul Mubarok Munawir, As'ad Nadi Rheiza Fathurrohman Niko Andika Erwanda Nur Addin Fatkunada Nursandah, Fauzie Ogest Tegar Widyakrama Oktaviadi, Mohammad Reza Onie Wardani Pertiwi, Sheila Ananda Putri Prendy Eliya Mahendra Putri, Yuzi Melia Adi Rahadi Reswara Rahmat Heru Rahmat Heru Rahmat Heru Supriyo Rahmat Heru Supriyo Rahmawati, Apriliya Laily Ramadhan Mahendra Ravie Setya Putra Rekso Ajiono Ricky Putra Ardianto Rikha Wirda Izzati Rina Dwi Fatika Rina Dwi Fatika Rivianto, Arif Rohmat Ilyas Kurniawan Roid Ahmad Faizin Romadhon Romadhon Romadhon, Fajar Rosyta, Heni Agnes Safi'i, Annas Dwi Safi'i, Imam Safi’i, Annas Dwi Saiful Muslimin Salman Alfaridh Pasya Sari, Tiara Sherlyta Satria Arung Bangun Samodera Satria Febby Romaadhoni Sefiyanti, Redyka Sheila Ananda Putri Pertiwi Sigit Winarto Sigit Winarto Sigit Winarto Sigit Winarto Sony Santoso Sony Susanto Sri Wiwoho Mudjanarko, Sri Wiwoho Sudjati Sudjati Sudjati Sudjati Sugeng Yani Widodo Sulik Anam Sulik Anam Sulik Anam Sumargono Sumargono Sumargono Sumargono Sumargono Supriadi Supriadi Supriono Supriono Suwarno Suwarno Tiara Sherlyta Sari Tiok Kresna Aji Two Puji Guntur A Uminarsih Uminarsih Veithzal Rivai Zainal Vella Maulina Kris Putri Wahyu Agung Nugroho Wardani, Onie Widodo Restu Putra Widodo, Silvi Rushanti winarti, eko Wisnu Arganata Yosef Cahyo Yosef Cahyo Yosef Cahyo S Yosef Cahyo S.P Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Poernomo Yosef Cahyo Setianto Purnomo Yulvi Zaika Yusiane Saraswati Yuzi Melia Adi Putri Zaizafun Zakiya Zaizafun Zakiya Zaizafun Zakiya Zakiya, Zaizafun Zendy Bima Mahardana