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http://dx.doi.org/10.5394/KINPR.2002.26.4.473

On the Reclamation Earthwork Calculation using the Hermite and Spline Function  

Mun, Du-Yeoul (Division of Civil Urban Engineering, Dongeui University)
Lee, Yong-Hee (Dept. of Construction & Traffic Intelligence, Yangsan College)
Lee, Mun-Jae (Post-Graduate, Dept.of Civil Engineering, Dong-Eeui University)
Abstract
The estimation of the volume of a pit excavation is often required in many surveying, soil mechanics, highway applications and transportation engineering situations. The calculation of earthwork plays a major role in plan or design of many civil engineering projects such as seashore reclamation, and thus it has become very important to improve the accuracy of earthwork calculation. In this paper the spot height method, proposed formulas(A, B, C), and chen and Line method are compared with the volumes of the pits in these examples. And we proposed an algorithm of finding a terrain surface with the free boundary conditions and both direction spline method drawback, i.e., the modeling curves form peak points at the joints. To avoid this drawback, the cubic spline polynomial was chosen as the methematical model of the new method. From the characteristics of the cubic spline polynomial, the modeling curve of the new method was smooth and matched the ground profile well. As a result of this study, algorithm of proposed three methods to estimate pit excavation volume provided a better accuracy than spot height, chamber, chen and Lin method. And the mathematical model mentioned makes is thought to give a maximum acccuracy in estimating the volume of a pit excavation.
Keywords
Pit excavation volume; Terrain surface; Seashore reclamation; Free boundary conditions; Accuracy; Cubic spline;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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