Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

All

U Karst

ukarst
Website

Published by Universitas Kadiri

ISSN : 25794620 EISSN : 25810855 DOI : http://dx.doi.org/10.30737/ukarst

Core Subject : Engineering,

Civil Engineering, Building, Construction & Architecture

U KaRsT is a journal of the civil engineering research the University of Kadiri published twice a year in April and November. First published in April 2017. U KaRsT already has both ISSN printed and online, for ISSN (Print) is 2579-4620, and ISSN (Online) is 2581-0855.

Arjuna Subject : -

Articles 243 Documents

6 7 8 9 10

SOIL SHEAR STRENGTH PARAMETER ANALYSIS BASED ON BEHAVIOR ANALYSIS OF LANDSLIDE CASE Dyah Wahyu Apriani; Umar Mustofa; Rachmad Hidayat
U Karst Vol 4, No 2 (2020): NOVEMBER
Publisher : Kadiri University

Slope failure is a complex event. It can provide useful information about the condition of soil parameters on the failed slope in the same way it can provide an opportunity to evaluate the stability of other slopes. To evaluate the occurence of slope failure, unit weight data and shear strength properties of soil are needed, as well as methods of analysis including failure mechanisms. One of the methods used to evaluate landslide events is reverse analysis. In this study, reverse analysis was carried out on landslides that occurred on the slopes of D-D 'and F-F' at the Integrated Campus Building of the Institut Teknologi Kalimantan. The finite element method is used to analyze the safety number of the slopes under review. From the results of the reverse analysis, it was obtained that the soil parameters at the time of collapse in the top layer resulted in the value of unit weight (γ) = 20 kN / m2, Cohesion (c) = 2 kPa and Internal friction angle (φ) = 27 ° . Slope failure occured due to an increase in soil volume weight value, as well as a decrease in soil shear strength parameters, namely cohesion and internal friction angle.

Identification of Physical and Mineralogical Properties of Riverbank Material at Sand Mining Landslide Sites of Kali Putih River, Blitar Arlita Mey Hapsari; Dian Sisinggih; Andre Primantyo Hendrawan; Sri Wahyuni
U Karst Vol 5, No 1 (2021): APRIL
Publisher : Kadiri University

Kali Putih River is a river that is often affected by the eruption of Mount Kelud. The resulting large deposits of volcanic sand materials cause exploitation through uncontrolled sand mines. This will have an impact on potential hazards caused by environmental damage; for example, there have been several cases of riverbank landslides. Based on previous studies, it is important to study the identification of physical characteristics and mineralogy of riverbank materials through laboratory testing. The Gs value was found to be within 2.650-2.697, which can be classified as gravel or sand. According to the AASHTO standard, the classification is coarse-grained soil. By USCS classification, all samples were determined as well-graded sand. Based on the JGS standard, these samples can be classified as Volcanic Soil (VS) and Volcanic Sand (SV). SEM results showed that the grain samples had low sphericity with angular to sub-angular and a bladed-oblate granular form. From X-RD analysis, the mineral composition of samples was dominated by anorthite (CaAl2Si2O8) and albite (Na(AlSi3O8)). Associated with Bowen's Reaction, these compounds are common in young materials when the weathering process is still progressing.

Performance Analysis Of “Toga” Foundation With Cap On Thick Soft Soil Based On Laboratory Models And Finite Element Analysis Melissa Kurnia; Paulus Pramono Rahardjo
U Karst Vol 4, No 2 (2020): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v4i2.1072

Various alternative foundations are offered depending on soil conditions from the results of soil investigations. In difficult soil types such as thick, soft soil layers, pile foundation is generally used to avoid the excess settlements, but deep foundations for small buildings are not the right solution when viewed from a cost perspective. One of the more economical foundations is to use the” toga” foundation, with a plate on top and a caisson underneath where the caisson can be inserted into the soil with an open end. Through this study, the carrying capacity of the” toga” foundation will be analyzed. Then the foundation will be made on a laboratory scale and tested with axial load. The load and deformation relationship were analyzed using PLAXIS 3D analysis. It can be concluded the performance of the ”toga” foundation on thick, soft soil can be used for two-floored buildings

Mapping of Landslide Susceptible Zones by Using Frequency Ratios at Bluncong Subwatershed, Bondowoso Regency Didik Efendi; Entin Hidayah; Akhmad Hasanuddin
U Karst Vol 5, No 1 (2021): APRIL
Publisher : Kadiri University

Landslides are the disasters that frequently happen in Bluncong sub-watershed. These incidents have caused damage and malfunction of road infrastructure, bridges, and irrigation buildings. Therefore, it is important to anticipate landslides through mapping of landslide-susceptibility areas The objective of this study is to map landslide susceptibility at Bluncong sub watershed, Bondowoso, by using Geographical Information System and remote sensing. The landslide susceptibility analysis and mapping are conducted based on landslide occurrences with the Frequency Ratio approach. The landslide sites are identified from field survey data interpretation. Digital Elevation Model maps, geological data, land uses and rivers data, and Landsat 8 images are collected, processed, and then built into the GIS platform's spatial database. The selected factors that cause landslide occurrences are land use, distance to river, aspect, slope, elevation, curvature, and the vegetation index (NDVI). The results show that the accuracy of the map is acceptable. The frequency ratio model gained the area under curve (AUC) value of 0.79. It is found that 9.08% of the area has very high landslide susceptibility. Local governments can use this study's mapping results to minimize the risk at landslidesusceptible zones

Strategy To Reduce Traffic Jams On Piet A. Tallo Street, Kupang City Amy Wadu; A A Tuati; M R Sodanango
U Karst Vol 4, No 2 (2020): NOVEMBER
Publisher : Kadiri University

Problems when the flow of traffic on urban roads exceeds the road's capacity, resulting in traffic jams. It happened on the Piet A. Tallo street during peak hour conditions. Especially in converted type of route from 4/2T to 2/2TT, which results in a buildup of traffic flow at that point. This research aims to analyze the volume to capacity ratio (v/c) and provide recommendations for long-term strategies to reduce traffic jams on Piet A. Tallo Street. Traffic flow and capacity analysis based on Guidelines for Indonesia Road Capacity 2014 (PKJI2014), while the projected growth in the number of vehicles in the next 20 years, uses the linear regression method. The results show that peak traffic flow exceeds road capacity in the 2/2TT segment with a v/c ratio of 1.08. Recommendations for handling this by regulating side friction and changing road segment type 2/2TT to 4/2T. Using linear regression projected traffic flow in 2040, road capacity can still serve traffic flow with a maximum v/c ratio of only 0.93.

Accuracy of DSM By Using Unmanned Aerial Vehicles on the Downstream of Welang Riverbank, District of Pasuruan, Jawa Timur Dian Wahyu Khaulan; Entin Hidayah; Gusfan Halik
U Karst Vol 5, No 1 (2021): APRIL
Publisher : Kadiri University

The Digital Surface Model (DSM) is commonly used in studies on flood map modeling. The lack of accurate, high-resolution topography data has hindered flood modeling. The use of the Unmanned Aerial Vehicle (UAV) can help data acquisition with sufficient accuracy. This research aims to provide high-resolution DSM-generated maps by Ground Control Points (GCPs) settings. Improvement of the model's accuracy was pursued by distributing 20 GCPs along the edges of the study area. Agrisoft software was used to generate the DSM. The generated DSM can be used for various planning purposes. The model's accuracy is measured in Root Mean Square Error (RMSE) based on the generated DSM. The RMSE values are 0.488 m for x-coordinates and y-coordinates (horizontal direction) and 0.161 m for z-coordinates (vertical direction).

THE EFFECT OF USING CERAMIC WASTE POWDER AS A SUBTITUTE FOR CEMENT ON THE COMPRESSIVE STRENGTH OF K250 CONCRETE Samsul Arif; Dwi Kartikasari
U Karst Vol 4, No 2 (2020): NOVEMBER
Publisher : Kadiri University

In every construction work, you will find the remains of building materials no longer used and disposed of as waste, one of which is a ceramic waste. Ceramic waste is waste that has no selling value. Therefore the authors in this study will utilize ceramic waste as a substitute for cement with concrete quality K250. Several studies have also explained that ceramic waste contains silica, which has high adhesion, making it suitable as a substitute for cement. The process of mixing ceramic waste as a K250 quality concrete mixture is carried out according to the Indonesian SNI Standard and ASTM standards by laboratory testing using a variation of 3%, 4%, and 5% as a substitute cement. From these results, the composition of the addition of 3% ceramic waste has an average compressive strength of 330.99 kg/cm2, a composition of 4% has an average compressive strength value of 243.88 kg/cm2, and a percentage of 5% has an average compressive strength value 258.41 kg/cm2. The more the ceramic waste mixture as a substitute for cement, the lower the compressive strength of the concrete

Risk Assessment of Feasibility Study for Toll Road X - Y with Public Private Partnership Scheme Hanie Teki Tjendani; Risma Marleno; Hendry Hendry; Iwan Subiyantoro
U Karst Vol 5, No 1 (2021): APRIL
Publisher : Kadiri University

The PPP scheme is carried out in Indonesia to procure public infrastructure but is constrained by the government's limited funds. Risk assessment is very important for investors to do to find out the uncertainty that can occur in investing their funds in infrastructure. This study aims to assess the Risk of Feasibility on the X - Y Toll Road, where the location is part of the East Java Province economic development acceleration program by President Regulation number 80 of 2019. The assessment carried out includes risk analysis in the pre-construction, construction, and post-construction stage. The data used are primary data and secondary data. From the assessment results, it was found that most of the assessment points were categorized as medium risk, and there was a little high risk. Still, this project is very profitable because it will be able to synergize with the previously planned infrastructure. The X-Y toll road is still possible by paying attention to risk factors and complying with risk mitigation efforts. The toll road procurement scheme with Public-Private Partnership (PPP) already has a robust legal rule and has been guaranteed in terms of security, and this scheme is very potential to be implemented.

Direct Shear Strength of Clay Reinforced with Coir Fiber Anita Widianti; Willis Diana; Maratul Hasana
U Karst Vol 4, No 2 (2020): NOVEMBER
Publisher : Kadiri University

Indonesia is the largest coconut producing country in the world. However, the resulting coir waste is still rarely used for structural materials. This research studied the effect of random inclusion of coir fiber on the shear strength of clay with high plasticity. The carried test in this study is a direct shear strength test. The fiber content variations used are 0%, 0.25%, 0.50%, 0.75%, and 1% of the dry weight of the mixture with a fiber length of between 30 mm to 50 mm. The results show that the reinforcement of coir fiber can increase the cohesion and friction angle. The maximum increase in cohesion value was obtained at fiber content of 0.75%, which was 39.66%. The increase in the value of the friction angle was obtained at 1% fiber content, which was 46.67%. The optimum coir fiber content was achieved at the fiber content of 0.75%. With this content, the value of the shear strength reaches its maximum with an increase of 39.4% at a normal stress of 8.071 kPa.

Assessment and Optimization of Water Division Pattern in Sampean Baru Irrigation Area Joice Prasasty September; Entin Hidayah; Gusfan Halik
U Karst Vol 5, No 1 (2021): APRIL
Publisher : Kadiri University

Recently, agricultural production in the Sampean Baru Irrigation area has not shown optimal cropping production. The average percentage of planted areas in the first (November-February),second (March-June), and third (July-October) planting seasons for the upstream area was 93.67%; 98.02%, and 76.76%, and for the downstream area was 83.54%; 80.81%; and 89.36%. This research aims to optimize the water distribution system based on the calculation of water requirements for plants and the availability of channels to obtain the maximum planting area and amount of agricultural production. This optimization method uses a Dynamic Program with three scenarios. This calculation is based on effective rainfall, crop water requirements, and water discharge availability. Percentage of planted area obtained from the calculation in the dry year for the first, second, and third planting seasons respectively were 100%, 100%, and 90.36%. Based on the existing condition, potential profit obtained for a year is Rp. 170.08 billion. After optimization using Dynamic Program, potential profit in the dry year, normal year, and wet year are IDR 213.52 billion, IDR 215.92 billion, and IDR 228.50 billion, respectively.

Page 8 of 25 | Total Record : 243

6 7 8 9 10

Filter by Year

2017 2023

Filter By Issues

All Issue Vol. 7 No. 2 (2023): NOVEMBER Vol. 7 No. 1 (2023): APRIL Vol. 6 No. 2 (2022): NOVEMBER Vol 6, No 2 (2022): NOVEMBER Vol 6, No 1 (2022): APRIL Vol. 6 No. 1 (2022): APRIL Vol. 5 No. 2 (2021): NOVEMBER Vol 5, No 2 (2021): NOVEMBER Vol. 5 No. 1 (2021): APRIL Vol 5, No 1 (2021): APRIL Vol 4, No 2 (2020): NOVEMBER Vol. 4 No. 2 (2020): NOVEMBER Vol. 4 No. 1 (2020): APRIL Vol 4, No 1 (2020): APRIL Vol. 3 No. 2 (2019): NOVEMBER Vol 3, No 2 (2019): NOVEMBER Vol 3, No 1 (2019): APRIL Vol. 3 No. 1 (2019): APRIL Vol 2, No 2 (2018): NOVEMBER Vol. 2 No. 2 (2018): NOVEMBER Vol 2, No 1 (2018): APRIL Vol. 2 No. 1 (2018): APRIL Vol. 1 No. 2 (2017): NOVEMBER Vol 1, No 2 (2017): NOVEMBER Vol. 1 No. 1 (2017): APRIL Vol 1, No 1 (2017): APRIL More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Agata Iwan Candra

Contact Email
iwan_candra@unik-kediri.ac.id

Phone
+62811308010

Journal Mail Official
ukarst@unik-kediri.ac.id

Editorial Address
Jl. Selomangleng no. 1

Location
Kota kediri,

Jawa timur

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Agata Iwan Candra

Contact Email iwan_candra@unik-kediri.ac.id

Phone +62811308010

Journal Mail Official ukarst@unik-kediri.ac.id

Editorial Address Jl. Selomangleng no. 1

Location Kota kediri, Jawa timur INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Agata Iwan Candra

Contact Email
iwan_candra@unik-kediri.ac.id

Phone
+62811308010

Journal Mail Official
ukarst@unik-kediri.ac.id

Editorial Address
Jl. Selomangleng no. 1

Location
Kota kediri,

Jawa timur

INDONESIA