Jurnal Teknik Sipil

Cover & Editorial Page Volume 21 Issue 2 Oktober 2025

2025-09-30T23:06:03+00:00

Study of DKI Jakarta Public Perceptions on the Revitalization of the Transjakarta BRT (Bus Rapid Transit) Bus Stop at Bundaran Hotel Indonesia

2024-10-21T10:12:49+00:00

Bundaran HI bus stop is one of the public transportation system infrastructures where this bus stop is one of the busiest due to the change in transportation modes. Currently, the bus stop looks more modern, narrow, crowded, and uncomfortable for service users. This is used for commercial purposes as a place for taking pictures and tourism. The research objective is to analyze the influence of facilities and service quality on BRT passenger loyalty, to determine the level of customer satisfaction that influences BRT services and to determine the perception of BRT users towards the revitalization of the bus stop. The method chosen is quantitative with data collected through a questionnaire survey of 442 respondents. The analysis method uses descriptive statistics and inferential statistics. Non-parametric statistical tests with Mann Whitney. While the customer satisfaction test uses a Likert scale. The results of the Mann Whitney test study where the Asymp.Sig. (2 tailed) value of 0.032 is smaller than the probability of 0.05, meaning that there is an influence of facilities and service quality on service user loyalty. A satisfaction level of 25% means dissatisfied/less good. Public perception of the revitalization of the Bundaran HI bus stop is negative. The recommendations for the government do not need to be built excessively and luxuriously, so that it does not become an example for other big cities. There is need to be a typical bus stop whose functions and benefits can be imitated, such as getting used to reading literature while waiting for the bus to arrive.

Analysis of Slope Failure at Jalan Muaradua – Kotabatu District OKU Selatan, South Sumatra

2024-10-08T03:38:00+00:00

Infrastructure development leads to the cutting of slope dan additional construction loads on crest. Although the impact of slope cutting and additional construction loads on slope stability has been taken into account, several processes that follow, such as increased pore water pressure caused by rainwater seepage and the occurrence of cracks on the ground surface, can trigger slope failure. This article presents a stability analysis of a natural slope that has been cut to make room for the construction of a new road below the existing road. The stability analysis shows that the slope is in a stable condition before (FoS = 1.694) and after the construction (FoS = 1.423). However, the slope collapsed after heavy rain for 3 days on July 20th – 22nd, 2022. The failure plane starts at the crest of the slope, which is in the middle of the existing road, and ends at the toe. Seepage analysis carried out due to rain infiltration by considering the position of the crack as the starting point of the landslide plane, shows that there is an increase in pore water pressure in the slope, and the FoS decreases to 0.973. Remedial work carried out after a failure includes realigning the existing road, strengthening the toe of the slope with a retaining structure, covering the slope surface with vegetation, and arranging surface drainage.

Modeling Analysis of Land Loss Rate Due to Rainfall Variation Using Rainfall Simulator (Laboratory Experimental Test)

2025-02-17T09:56:26+00:00

Soil erosion affects the quality level of soil carrying capacity. This happened in the TP PKK Collective Garden in Bandar Lampung City, which experienced fertility degradation due to reduced soil nutrient content. The purpose of this study is to analyze the effect of slope variations with variations in rainfall intensity on the magnitude of erosion in non-vegetated soils and to identify control strategies that can be applied. The method used in this study is to use a Rainfall Simulator with variations in the slope and intensity of rain on non-vegetation soils. The results of the calculation of the highest erosion rate of 14.91 tons/ha occurred at (slope of 45% with a rain intensity of 1.75 liters/minute), while the lowest erosion rate of 1.67 tons/ha occurred at (slope of 8% with a rain intensity of 0.75 liters/minute). Statistical analysis showed that the relationship between erosion rate and rainfall intensity and slope had a determination coefficient close to 1, indicating that these variables had a significant influence on erosion rate. The conclusion is that the rate of erosion increases along with the slope and the intensity of rainfall, therefore efforts to reduce erosion by planting plants, planting plant residues, making terraces, and using chemical or natural prepats.

Comparative Analysis of Quantity Take-Off Conventional Methods with Bim-Based Calculations in Bridge Concrete Structure Work

2024-10-24T02:23:30+00:00

development. Generally, QTO work is carried out using conventional methods, namely by calculating the dimensions of building elements through area, volume and length. Revit is BIM-based software released by Autodesk which can be used to calculate QTO in a construction project. In this research, a comparison was made of the QTO calculations for concrete structures for bridges from the Rengat-Pekanbaru Toll Road Construction Project at STA 172+684.110 using conventional methods and BIM methods. 3D modelling was carried out with the help of Autodesk Revit software, while conventional calculations were carried out by calculating the volume based on the Initial Stage Plan Drawing (RTA) with the help of Autocad software. There is a deviation or difference in the output results of the QTO calculation of the bridge concrete spun pile work 1.64%, Diaphragm 0.25%, barrier 1.91%, abutment 0.69%, tread plate 3.64%, Pilecap 0.33%, Pier 0.13%, and Pier Head 0 .74%. According to BIM experts, the tolerance for QTO calculation deviation is 0-5%, if it is more than the limit then a recalculation must be carried out. One of the causes of calculation deviation is due to human error.

The Effect of Adding Fly Ash Waste on the Compressive Strength and Water Absorption of Brick Bricks

2024-11-01T06:30:29+00:00

The method of reduce waste from coal combustion from Steam Power Plant activities to add fly ash into the brick mixture. The small particles can reduce voids in the brick, thereby increasing compressive strength and reduce water absorption This research aims to utilize fly ash Pesona Khatulistiwa Nusantara LLC as an environmentally friendly brick mixture which is expected to increase compressive strength and reduce water absorption. This analysis was conducted based on SNI 03-0349-1989, data validation through experimental tests by making variations of brick test specimens. Each variable has a different percentage of fly ash composition, the composition in the laboratory uses wet fly ash is 0%, 10%, 20%, 30%, 35%, 40% and the composition on site using wet fly ash is 0%, 10%, 20%, 25%, 30%, there is an additional variable of 20% dry fly ash. This difference in composition takes the best 4 results from laboratory testing. The result of testing bricks with 30% fly ash addition on site had the highest compressive strength of 21.04 Mpa with an average water absorption of 9.45%, these bricks have been categorized as category I with water absorption.

Optimization of Mahakam Sand and Lightweight Brick Waste Utilization as Fine Aggregates in the Production of Class D Paving blocks

2024-11-01T03:07:02+00:00

. In the increase in construction projects using lightweight bricks, the amount of waste generated has also increased. To address this issue, this research evaluates the use of lightweight brick waste as a replacement for Mahakam sand in the production of paving blocks according to SNI 03-0691-1996. The experimental method was used with control test objects without lightweight brick waste and test objects with varying amounts of lightweight brick waste. The mixture composition was 1pc:6ps with a water-cement ratio of 0,35, and lightweight brick waste constituting 0%, 25%, 50%, 75%, and 100% of the sand weight. The Paving blocks were made using manual compaction tools. Compressive strength testing was conducted at 3, 7, and 28 days, while absorption testing was done by soaking for 1 day. The results showed that paving blocks with 50% lightweight brick waste had the highest compressive strength at 28 days, reaching 47,81 MPa, classified as class A. The addition of lightweight brick waste also increased the water absorption of the Paving blocks, with the lowest absorption in the 25% mixture at 2,17%, also classified as class A. These findings demonstrate the potential for using lightweight brick waste in the production of environmentally friendly paving blocks.

Literature Study Analysis of the Development of Fly Ash-Based Geopolymer Concrete on Strenght and Durability

2024-11-01T03:09:55+00:00

Geopolymer concrete is a type of concrete that utilizes waste materials as a substitute for Portland cement. One of the most commonly used waste materials in geopolymer concrete is class F fly ash. Based on experimental research, class F fly ash has the potential to act as a binding material in geopolymer concrete mixtures. Several studies have indicated a significant relationship between class F fly ash and the strength and durability of geopolymer concrete. However, other studies have not supported this statement. To address this issue, a literature review was conducted to examine the performance of fly ash-based geopolymer concrete in terms of strength and durability. The data used in this study were derived from 25 research journals, comprising a total of 126 specimens. These specimens were categorized based on the results of strength and durability tests. Strength was evaluated using compressive strength tests, while durability was assessed through water absorption, exposure to elevated temperatures, and exposure to chemical substances. The study focused on analyzing the effect of fly ash percentages on the strength and durability of geopolymer concrete. The analysis methods applied in this study included visual graphics and regression statistics. Based on the findings of the collected data, it was concluded that fly ash, as a precursor, does not have a significant effect on either the strength or durability of geopolymer concrete.

Comparison of Water Level Drawdown Profiles for Unconfined Aquifers Using 3D Modflow Case Study Pantai Indah Kapuk

2024-10-22T03:26:13+00:00

Dewatering is required to control the flow of groundwater and to lower the position of the groundwater table during excavation. In planning the dewatering system, parameters related to the flow of water in the soil are required. One of these is the conductivity value, which can be obtained from pumping tests. The sand layer found on the ground surface, which is saturated of water, is referred to as an unconfined aquifer. In this study, conductivity analysis of unconfined aquifer was conducted in PIK2 area using 3 conventional methods which are, Thiem (1906) method and curve matching method of Boulton (1963) and Neuman (1972). Conductivity values obtained from conventional calculations are then analyzed using the help of a program based on the 3D finite difference method Modflow to obtain a pattern of groundwater level decline or can also be called a depression cone. In sandy soil in the PIK2 reclamation area, conductivity values of 5.90×10^-5 m/s to 8.08×10^-5m/s were obtained Neuman's method can produce better conductivity values in unconfined aquifers, as shown by the results of the water table profile from the 3D Modflow analysis.

TDS and pH Produced by Bee Nest Water Purifiers Due to Differences in the Thickness and Density of Coconut Fiber Filter Media

2024-10-11T09:42:58+00:00

Sarang Tawon water purifier uses filtration principle which is done repeatedly through certain filter media that are arranged in layers. The water quality as the filtration result is influenced by the filtration system and the type of filter media used and the duration of purifying process. The factor of thickness and filter media density were neglected until causing problem in the duration of water purifying process. This research aimed to find out the influence of thickness difference and filter media density of Sarang Tawon water purifier towards the parameter of Total Dissolved Solids (TDS) and pH. The experimental method was applied by testing the thickness of zeolite stone filter media combination, ginger coral, and coconut fiber from the Sarang Tawon water purifier with radius 4R/3, R, and 2R/3 where R=3 inches. The density variations of coconut fiber filter media were 20%, 40%, 60%, 80% and 100%. The research results showed that the thickness of filter media in Sarang Tawon water purifier tool with radius 4R/3 with coconut fiber filter media density was 80% owning the ability to increase the highest pH value. There was increase of TDS parameter in each trial caused by the dissolved of ginger coral filter media, but it did not show significant number. TDS parameter resulted by the tool with radius 2R/3 with density variation of coconut fiber filter media amounted 80% showed a relatively stable value.

Analysis Of Factor Mode Choice of Local Trains and Feeder Trains as Connecting Transportations Modes of Whoosh High-Speed Train From-To Padalarang Station

2024-10-28T03:46:12+00:00

With the provision of feeder mode (Feeder) train, which consists of Feeder Train and Commuter Line Bandung Raya, it will provide several alternatives for passengers who will continue their trip to the center of Bandung City. Under existing conditions, the Feeder Train experienced a significant increase in interest compared to the Commuter Line Bandung so that there is a gap in the probability of Feeder Train passengers with Commuter Line Bandung Raya. This is what makes researchers feel the need to analyze passengers' preferences in choosing the next mode of transportation and get an understanding of what factors influence the choice of transportation and sensitivity to the model. The number of samples from this study amounted to 96 respondents with data analysis methods using logistic regression analysis and binary logit difference analysis. Based on the results of logistic regression analysis, the following difference utility function model is obtained: P_Feeder= 1/(1+ e^(-(0.442 + (X₁) + 0.122 (X₂) + 0.023 (X₃) + 0.020 (X₄) + (X₅))) with P_Feeder = Probability of Feeder Train, PCL = Probability of Comline Baraya, X₁ = cost, X₂ = frequency, X₃ = travel time, X₄ = headway, X₅ = capacity. From the model, a higher probability of choosing Feeder Train is obtained with a probability value of 61% and the probability value of Commuter Line Bandung Raya is 39%. In other words, respondents still tend to choose Feeder Train to be used as a further mode of transportation, with influencing factors based on test results with high significance, namely cost, time and headway. From the results of the sensitivity analysis of the cost, travel time and headway variables, the cost variable is the most sensitive variable if there is a change in value on the attribute compared to the travel time and headway variables.

The Effect of Number of Bays and Story on the Required Time Gap Between Mainshock and Aftershock Earthquake for Time History Dynamic Analysis

2025-04-24T09:08:16+00:00

Seismic sequences cause cumulative structural damage; therefore, aftershocks must be considered in design. A key factor in time history analysis with seismic sequences is the time gap (T_R) between the mainshock and aftershocks, during which acceleration is zero. T_R is critical, as long earthquake durations can lead to high analysis time and cost. This study analyzed 16 structural models with varying numbers of bays and stories but identical plan areas, using seven records from the 1994 Northridge earthquake. At zero acceleration, a TR value of 60 seconds is added and will be increased to 120 seconds, if the acceleration and speed values of the roof structure do not reach values very close to zero (AR₀ and VR₀). Results show that T_R increases almost linearly with the structural period (T_S). Thus, increasing the number of bays reduces T_R if T_S decreases, while increasing the number of stories raises T_R if T_S increases. However, earthquakes with longer predominant periods result in smaller T_R values.

Assessment of Coastal Damage in Teluk Ambon District and Priorities for Handling

2025-04-07T05:54:33+00:00

Assessment of Beach Damage in Teluk Ambon Sub-district and Prioritisation of Handling. In the management of coastal areas, the assessment of the level of damage to coastal protective buildings is an initial planning step in controlling, preventing, protecting and restoring damage to land, infrastructure and public infrastructure in coastal areas. Assessment or evaluation of the level of coastal damage is needed to find locations of coastal damage that require immediate action. This research was conducted to assess the level of coastal damage and prioritize the handling of coastal protection buildings along the Teluk Ambon sub-district which consists of 8 districts / villages which are then divided into several segments. Each segment was separated by the estuary or edge of the coastal protection structures under review. This study starts by collecting data on damage to coastal structures, analyzing it, then weighing the level of damage and determining the priority of handling. The assessment was conducted in reference to the Circular Letter of the Minister of Public Works No. 08/SE/M/2010 on Guidelines for Beach Damage Assessment and Prioritization of Handling. The coastal damage parameters analyzed include damage/failure of coastal buildings with EA-2 code. The results showed that there were no beach buildings that suffered very heavy (ASB), very heavy (AB) and heavy (B) damage. Coastal buildings that experienced moderate damage (S) with less priority (D) were located in segment 4b of Laha Village. Coastal structures that suffered minor damage with no priority are in segments 1 to 4 of Hunuth Village, segments 1 to 5 of Poka Village, segments 1 to 3 of Rumah Tiga Village, Segments 1 and 2 of Wayame Village, segments 1 to 8 of Hative Besar Village, segments 1 to 4 of Tawiri Village, and segments 1 to 4a of Laha Village.