• Title/Summary/Keyword: dump truck

Search Result 42, Processing Time 0.018 seconds

Impact Variables of Dump Truck Cycle Time for Heavy Excavation Construction Projects

  • Song, Siyuan;Marks, Eric;Pradhananga, Nipesh
    • Journal of Construction Engineering and Project Management
    • /
    • v.7 no.2
    • /
    • pp.11-18
    • /
    • 2017
  • The cycle time of construction equipment for earthwork operations has a significant impact on project productivity. Elements that directly impact a haul vehicle's cycle time must be identified in order to accurately quantify the haul cycle time and implement strategies to decrease it. The objective of this research is to scientifically identify and quantify variables that have a significant impact on the cycle time of a dump truck used for earthwork. Real-time location data collected by GPS devices deployed in an active earthwork moving construction site was analyzed using statistical regression. External data including environmental components and haul road conditions were also collected periodically throughout the study duration. Several statistical analyses including a variance analysis and regression analysis were completed on the dump truck location data. Collected data was categorized by stage of the dump truck cycle. Results indicate that a dump truck's enter idle time, exit idle time, moving speed and driver visibility can significantly impact the dump truck cycle time. The contribution of this research is the identification and analysis of statistically significant correlations of variables within the cycle time.

Low Frequency Noise Characteristics of Dump Truck (덤프트럭의 저주파 소음 특성)

  • Jung, Sung-Soo;Jeon, Byeong-Su;Shin, Su-Hyun
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2007.11a
    • /
    • pp.1183-1186
    • /
    • 2007
  • The low frequency noise, including infra-sound is known to affect human physiology and psychology. Guidelines and measurement method of low frequency noise has been introduced in several countries in order to evaluate low frequency noise. In this work, low frequency noise characteristics of dump truck was investigated in terms of the noise level and spectrum. The interior sound pressure level of the dump truck was between 60 and 105 dB in the frequency range of $1{\sim}250$ Hz.

  • PDF

Structural Analysis of the Deck of a Dump Truck Based on Bulk Material Behavior using the Discrete Element Method (이산요소법을 이용한 벌크 재료 시뮬레이션에 의한 덤프 트럭 데크 하중산출에 대한 연구)

  • Ryu, Seung Hun;Woo, Ho Kil
    • Journal of the Computational Structural Engineering Institute of Korea
    • /
    • v.33 no.3
    • /
    • pp.187-192
    • /
    • 2020
  • To reduce fuel consumption by reducing the weight of the deck of a dump truck and to design an eco-friendly deck, accurate structural analysis is required. To date, the load on the deck has been calculated based on the hydrostatic pressure or by applying the earth pressure theory. However, these methods cannot be used to determine the non-uniformity of the load on the deck. Load distribution varies depending on the size distribution and interaction of aggregate particles. Compared with the finite element method, the discrete element method can simulate the behavior of aggregate particles more effectively. In this study, major properties were obtained by measuring bulk density and repose. The deck of a 15 ton dump truck was simulated using the obtained properties and bumping, breaking, and turning load conditions were applied. EDEM, which is a discrete element analysis software, was employed. The stress and strain distribution of the deck were calculated by NASTRAN and compared with the measured values. The study revealed that the results derived from a DEM simulation were more accurate than those based on mathematical assumption.

Revision of Representative Truck's Weight to Power Ratio in S. Korea (우리나라 대표 트럭의 총중량/엔진성능 재정립)

  • Kim, Young Rok;Jeong, Jun Hwa;Lee, Suk Ki
    • International Journal of Highway Engineering
    • /
    • v.17 no.4
    • /
    • pp.1-9
    • /
    • 2015
  • PURPOSES : The purpose of this study is to revise the weight to power ratio of the representative truck in S. Korea. So far, S. Korea has been using the unit lb/hp, and the construction machines were not considered in the evaluation of the performance of trucks. METHODS : This study was performed to recommend the use of ISO system of units, and to analyze the weight to power ratios of the representative trucks in S. Korea, including the dump trucks, concrete mixer trucks, and asphalt and concrete diffusers. RESULTS: From this study, the 85 percentile value of the weight to power ratio of the trucks in S. Korea's was found to be 103.6 kg/kw. CONCLUSIONS : The performance standard for the representative truck has to be increased upward, considering the travel pattern of the dump trucks, concrete mixers, and asphalt and concrete diffuser trucks, travel distances, narrow area (work zone) of operation, and the saving in construction budget for climbing lane. Based on this study, the weight to power ratio of the representative truck in S. Korea could possibly be revised to 100~110 kg/kW.

Creation of Vector Network Data with Considering Terrain Gradient for Analyzing Optimal Haulage Routes of Dump Trucks in Open Pit Mines (노천광산 덤프트럭의 최적 운반경로 분석을 위한 지형경사가 고려된 벡터 네트워크 자료의 생성 방법)

  • Park, Boyoung;Choi, Yosoon;Park, Han-Su
    • Tunnel and Underground Space
    • /
    • v.23 no.5
    • /
    • pp.353-361
    • /
    • 2013
  • Previous studies for analyzing optimal haulage routes of dump trucks in open pit mines mostly used raster data. However, the raster data has several problems in performing optimal route analyses: (1) the jagged appearance of haulage roads according the cell resolution often causes overestimation of the travel cost; (2) it difficult to trace the topological relationships among haulage roads. These problems can be eliminated by using vector network data, however a new method is required to reflect the performance characteristics of a dump truck according to terrain gradient changes. This study presents a new method to create vector network data with the consideration of terrain gradient for analyzing optimal haulage routes of dump trucks in open pit mines. It consists of four procedures: (a) creating digital elevation models, (b) digitizing haulage road networks, (c) calculating the terrain gradient of haulage roads, and (d) calculating the average speed and travel time of a dump truck along haulage roads. A simple case study at the Roto South pit in the Pasir open pit coal mine, Indonesia is also presented to provide proof that the proposed method is easily compatible to ArcGIS Network Analyst software and is effective in finding optimal haulage routes of dump trucks with considering terrain gradient in open pit mines.

Experimental and Numerical Analysis on Vibration Behavior of Underground Three-layered Pipeline subjected to Dump Truck Loads (덤프트럭 재하 조건에 따른 지중 삼중관의 실험 및 수치해석적 진동 거동 분석)

  • Cho, Seok-Ho;Won, Jong-Hwa;Kim, Jeong-Jae;Kim, Moon-Kyum
    • Journal of the Korean Institute of Gas
    • /
    • v.15 no.1
    • /
    • pp.22-29
    • /
    • 2011
  • Pipes buried in around a construction site of urbanized area tend to be affected by the vibration caused by construction loads. The behaviors of buried pipes affected by periodic vibration were analyzed through numerical analyses based on existing study and experimental results. From the results of theses analyses, the serviceability of buried pipes subjected to vibration was verified. This study analyzed the pipe behaviors subjected to dump truck loads with respect to burial depths, and this research was performed as foundation study to establish standards for managing buried pipes. The analyses were performed with burial depth of 0.6, 1.2, 1.8m and vehicle velocity of 10km/h. From theses analyses, the vibration velocity and occurred stress tend to decrease as a burial depth increases.

A Study on the Estimating of the Dump Truck's Travel Speed Based on Analysis of Factors Affecting Earthmoving Operation (운반작업의 영향요소분석을 통한 덤프트럭의 운반속도 산정방법에 관한 연구)

  • Park, Hyeon-Yong;Tae, Yong-Ho;Woo, Sung-Kwon
    • Korean Journal of Construction Engineering and Management
    • /
    • v.8 no.3
    • /
    • pp.97-105
    • /
    • 2007
  • In many construction projects, such as dams, highways, airports, buildings, industrial plants, and sewerage and drainage systems earthmoving operation is defined the movements of a certain quantity of earth to alter the surface configuration or conditions so that projects requirement can be met. Accurate calculation of travel time is essential for determining productivity of earthmoving operations, and for ultimately selecting the most cost-effective fleet configuration for executing the work. Also transportation work that utilizes dump truck consists average So in the whole expenses earthmoving operation, and is an important cost factor for cost management. Therefore this study proposes a methodology for optimum transfer speen based on the analysis of factors affecting earthmoving operation in different road types by collecting the sources of dump truck running speeds and considering the main factors affecting the earthmoving operation.

A Study on Development of Dump Truck Route Exploration System (토공 운반경로 탐색 시스템 개발에 관한 연구)

  • Kang, Sanghyeok;Park, Soohyun;Seo, Jongwon
    • KSCE Journal of Civil and Environmental Engineering Research
    • /
    • v.38 no.6
    • /
    • pp.957-965
    • /
    • 2018
  • This study presents a geographic information system based dump truck route exploring system (DRES) which provides construction managers and hauling operators with efficient route information that can improve earthmoving productivity by reducing hauling time. The system is comprised of Network Analyst from Esri as a route exploring engine and a network data model. The network data model includes information on weight limit of bridges, height limit of pedestrian overpasses, and one way that impedes dump trucks' hauling efficiency. A construction manager is expected to input origin and destination point in the user interface, and the system generates an efficient route that avoids bridges with weight limit or pedestrian overpasses with height limit. The system was applied to a real earthmoving project to test its applicability, and it was found that the system functions as intended.