Accuracy Comparison of Roadway Earthwork Computation between 3D and 2D Methods

This study aims to calculate the earthwork volume in 3D method that has been seldom used before in roadway engineering, and to reconfirm the feasibility of average-end-area method for earthwork volume that is widely used in literature. After reviewing the related studies and comparing various Computer Aided Design (CAD) packages, the analysis of accuracy difference between 3D method and average-end-area method is conducted. It shows that in average-end-area method the critical value of interval distance between two consecutive cross sections is 30m. It also shows that the Change Rate of Cut-Fill (CRCF) value, an index firstly proposed to represent the cut-fill variance frequency associated with roadway terrain, alignment and profile design, has no significant impacts on the accuracy of 2D result. It is concluded that the 3D method could be easily used in practice with the CAD software. Meanwhile, average-end-area method with less than the critical interval distance between two consecutive cross sections can guarantee the earthwork calculation accuracy.

[1]  Cassie Hintz,et al.  Comparison of Earthwork Computation Methods , 2011 .

[2]  Said M. Easa.  Estimating Earthwork Volumes of Curved Roadways: Mathematical Model , 1992 .

[3]  Fernanda Leite,et al.  Evaluation of accuracy of as-built 3D modeling from photos taken by handheld digital cameras , 2012 .

[4]  Bao Yan.  Applications of the MapGIS-Based Digital Topographic Model on Earthwork Calculation on Land Consolidation , 2011, 2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring.

[5]  A. Hilmi Lav,et al.  Method for Balancing Cut-Fill and Minimizing the Amount of Earthwork in the Geometric Design of Highways , 2003 .

[6]  Kazuhiro Aruga,et al.  Application of an airborne laser scanner to forest road design with accurate earthwork volumes , 2005, Journal of Forest Research.

[7]  Jia-Chong Du,et al.  3D laser scanning and GPS technology for landslide earthwork volume estimation , 2007 .

[8]  Paul Schonfeld,et al.  Estimating Highway Earthwork Cross Sections by Using Vector and Parametric Representation , 2001 .

[9]  Said M. Easa.  Discussion of "Cut and Fill Calculations by Modified Average-End-Area Method" , 1992 .

[10]  Said M. Easa,et al.  Selection of roadway grades that minimize earthwork cost using linear programming , 1988 .

[11]  David R. Maidment,et al.  Digital Elevation Model Analysis and Geographic Information Systems , 2006 .

[12]  Ahmad A. Moreb,et al.  Linear programming model for finding optimal roadway grades that minimize earthwork cost , 1996 .

[13]  D. Fairbairn,et al.  Empirical method of error analysis in volume estimation : Monte Carlo simulation under kriging and triangulation , 2001 .

[14]  Said M. Easa.  ESTIMATING EARTHWORK VOLUMES OF CURVED ROADWAYS: SIMULATION MODEL , 2003 .

[15]  Waheed Uddin.  Airborne Laser Terrain Mapping for Expediting Highway Projects: Evaluation of Accuracy and Cost , 2008 .

[16]  Han Feng.  Fast calculation method for cubic metering of earth and stone of road line based on GIS , 2007 .

[17]  Edward M. Mikhail,et al.  Introduction to surveying , 1984 .

[18]  Youssuf M. Siyam.  PRECISION IN CROSS-SECTIONAL AREA CALCULATIONS ON EARTHWORK DETERMINATION , 1987 .

[19]  Kerry T. Slattery,et al.  Road Construction Earthwork Volume Calculation Using Three-Dimensional Laser Scanning , 2012 .