IJTI (International Journal Of Transportation And Infrastructure)
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COST ESCALATION ANALYSIS (PRICE ADJUSTMENT) ON MULTI YEARS INFRASTRUCTURE PROJECTS (PLUAL YEARS)
Full text linkThe Kalimati Long Storage Project for Raw Water is one of the projects implemented in Sidoarjo Regency under the supervision of the Brantas River Basin which is a Multiyears project. Where project activities last for 2 (two) years or approximately 720 working days. Multiyears (Multiple Years) projects have risks in the implementation process. One of the risks in the Multiyears project is the adjustment of the unit price of contract components which include building materials, labor, and equipment to the contract value at the time of the auction. In bidding prices in the tender/auction process, contractors must pay attention to construction costs, overhead and profits.
The accuracy of the construction cost estimation is in accordance with the project stages from planning, design to final estimation at the time of project completion. The guidelines in this study use the escalation calculation that has been regulated based on Presidential Regulation Number 70 of 2012 article 92 which has been stated in the project agreement contract. This research was conducted on a multi-year project based on government regulations and literature.
From the analysis of the cost escalation calculation for October 2018 – December 2019 there is a weight difference of 6.74% from the escalation value. The results of the calculation of the escalation value obtained a value of Rp. 13,457,629.000.00. While the value of the increase in costs of Rp. 199,732,279,557.48 with a total payment of Rp. 357,235,377,870.00. There is a weight difference of 6.75% from the escalation value. The results of the calculation of the escalation value obtained a value of Rp. 13,485.882,216.22. While the value of the increase in costs of Rp. 199,732,279,557.48 with a total payment of Rp. 357,263,630,870.0
PERFORMANCE ANALYSIS OF SENTUL CIRCUIT ROUNDABOUT AND ALTERNATIF ROAD SENTUL BOGOR
Full text linkA roundabout is an intersection equipped with circular lanes and has a design specification and is equipped with traffic equipment. The various patterns of movement will intersect each other, causing conflict points at an intersection. This study aims to determine the performance of the Sentul circuit roundabout and the Sentul alternatif road segment. Traffic data was collected for 3 days using the 1997 MKJI method, then made a traffic simulation using the PTV Vissim.The results of the study showed that the highest traffic volume was on Tuesday, November 23, at: the 9725 pcu/hour roundabout and the alternatif sentul total 2 directions 7865 pcu/hour. Sentul circuit roundabout using MKJI 1997 obtained DS values for each link: weaving area 1 (0.81), weaving area 2 (0.81), weaving area 3 (0.86), weaving area 4 (0.77) and alternatif sentul roads: roundabout direction (0.41) , the direction of Bogor (0.45). PTV Vissim the level of service for the sentul circuit roundabout and the alternative sentul: Sentul circuit roundabout: weaving area 1 (e), weaving area 2 (d), weaving area 3 (c), weaving area 4 (f). section alternative sentul: roundabout direction (b) and Bogor direction (b). alternative solution for scenario 1 by restricting heavy vehicles (HV) during rush hour is obtained DS: link 1 (0.69), link 2 (0.64), link 3 (0.72), link 4 (0.62)
Analysis of Health and Safety Risk Management (OHS)
Full text linkThis study intends to identify OHS risks in the workforce, control risks, and assess risks that occur in construction projects. This implementation was carried out in the KPP Sidoarjo State House Rehabilitation project. This data collection uses the interview method and filling out questionnaires directly to the workforce as many as 15 respondents who then arrange the risk potential variables based on each job so that 37 potential risk variables are produced. In the conclusion, there are results of the risk level assessment based on the AS/NZS 4360 standard, there are 20 variables that are categorized as medium level and 17 variables that are categorized as low level. exposed to noise when using a grinding machine when cutting ceramics (ceramic installation process), while for the lowest value of 1.47 which is included in the low level, the workers' eyes are exposed to paint splashes (painting process)
Soil Improvement Using the Stone Column Method at the International Port of Tibar, Timor-Leste
Full text linkStone column (stone column) is one of the soil improvement methods that fall into the category of "reinforcement" or soil strengthening which uses aggregate in the form of gravel or crushed stone to make columns with a certain diameter and depth in the soil layer with the aim of increasing the carrying capacity of the soil and reducing settlement. . The stone column method is intended to detail the soil improvement work in this project both on land and at sea. The stone column method has been used to improve weak soils since the 1950s. The rigid granular elements of the stone column increase the stiffness and shear resistance of the weak soil and the permeable nature of the column accelerates consolidation settlement so that residual settlement can be limited to a tolerable value. Various design methods have been used to design stone columns over the years ranging from simple hand calculations to complex and highly complex numerical models. Important considerations include the type of structure to be supported, in-situ soil properties of stone column material parameters, area replacement ratio, stress concentration and consolidation time. Like other geotechnical methods, the stone column method requires stability checks and workability checks. Not only the stone column method but there are several design methods that will be discussed in this journal paper and will highlight some of the advantages and disadvantages of each approach. Importantly, all soil improvement methods, whether simple or complex, must be verified by post-treatment testing with field measurements
FEASIBILITY STUDY OF CONFLICT HANDLING TRAIN RAIL CASE STUDY: 53 SINGOSARI DIRECT CROSSING ROAD
Full text linkAnalysis of Damage For Flexible and Rigid Pavement Using Pavement Condition Index (PCI) and Bina Marga Methods
Full text linkComparison Analysis of Cost and Time Forming Conventional Method With Semi-System Method for Column Namira Hotel Surabaya
Full text linkIn the implementation of project activities, careful steps are needed and the determination of the right implementation method to obtain cost and time efficiency. In general, there are 3 types of formwork, namely conventional formwork, semi-system formwork, and system formwork. The difference between the three types can be seen from the material used. This study aims to determine the comparison of formwork in terms of method, cost and time in the construction of the Namira Hotel project located on Jl. Pagesangan Surabaya which consists of 9 floors. The cost of formwork is usually between 35% to 60% or more of the total construction cost. Material requirements are usually referred to as the calculation of the volume of work. The volume of a formwork work depends on the planned area. The duration needed to complete a job is influenced by the worker. So in order to determine the success of a project, the factors that must be considered are in terms of labor productivity and the number of workers. In the construction of Hotel Namira Surabaya, the cost of conventional column formwork was IDR 376,052,918.80 and for semi-column formwork it was IDR 214.624.700,00 where the duration of semi-system formwork was faster than conventional formwork
Study of Behavioral of Vertical Irregular Building Structure by Applying Column Variation Due to Earthquake using Dynamic Analysis
Full text linkThe development of high-rise buildings in Indonesia is now increasingly diverse. The need for increasingly narrow land functions affects the shape of the building which tends to be irregular. Irregularity in the building requires structural planners to build buildings that are safe against earthquakes but also do not forget the aspect of user comfort. In this study, an analysis of the dynamics of earthquakes was carried out in buildings that have vertical geometric irregularities by varying the dimensions and reinforcement of the columns. The behavior of the building structure produces structural responses in the form of base shear, fundamental period, displacement and story drift. Analysis of earthquake using dynamic analysis of response spectrum based on SNI 1726 2019 with the help of ETABS software version 9.7.4. The results of this research indicate that the variation of column dimensions and column reinforcement in buildings with irregular vertical geometry reduces the stiffness of the building thereby reducing the forces in the structure, increasing the fundamental period, reducing the base shear force, increasing the displacement and the story drift
Analysis and design of precast cast-in situ concrete composite
Full text linkThe quay is a building structure made at sea to connect the land and harbor parts that function as a place for docking or mooring ships that will carry out loading and unloading activities of loading and unloading passengers. The wharf at the Tibar port is operated for loading/unloading general cargo containers. The dimensions of the floor plate for the wharf are 75cm, T4 transverse beams 6,900 x 1,500 x 1,500 m, longitudinal beams 5,400 x 1,750 x 1,500 m, pile cap 1.69 m² and pile foundation length The pile for the diameter of 1.5 m is 80 m, the Pile of 1.8 m is 81 m. The wharf has a length of 630 m, a width of 62 m and a depth of 16 m and the structure type of this pier is reinforced concrete and steel piles
The Foundations in Construction, a General and Comprehensive Study from an Engineering and Historical Perspective
Full text linkThe bottom base of the structure is the very uppermost part because it connects the superstructure of the body to the ground. This bottom base is known as the foundation. In this paper we will discuss and analyze the types of foundations used in the construction industry, there is a design and also in alternative materials that we can use as foundation materials in construction that can make it more solid, durable and environmentally friendly. It is critical to build a stable base that maintains the superstructure in all climatic conditions without collapsing or deteriorating the concrete structure. If any unsuitable material is used for the foundation of the structure, the high risk is the collapse of the structure. Different types of foundation base are used in different types of structural structures, each with a unique design and specific configuration that makes a particular structure more durable and stable. A different type of foundation is used in cottages and high-rise buildings. This study presents the use of foundations for the superstructure, and appropriate design, and we will discuss more precisely about how to make the foundation foundation environmentally friendly, cost-effective for the structural building, and make it more durable and strong to withstand natural and environmental disasters