If the 25 points in Figure 2 define the stripped ground, these points are to be triangulated and a three dimensional string (cross section) between A B and C D is to be created – – from the triangulation with the resultant two strings being included in the Embankment Foundation (stripped ground) surface. Figure 3 shows the resultant triangulation when these cross section strings between A B – and C are created and included in the models. –D Figure 3 Full Triangulation – For any volume calculations for Main Roads projects, where the coincident string along the boundary (Refer Section 7.2) does not reflect the shape of the surface, the generation of cross section strings detailed above shall apply. This shall particularly apply to surfaces defined by spot heights. 7.2.2 Rock (Embankment Foundation) Calculations Where rock is excavated wholly within the area of embankment, the boundary shall be defined as the extremity of the rock surface at the level defined by Specification 302 Earthworks - Rock Excavation. Where part of the area of rock to be excavated falls outside the toe of batter of the embankment (interface string), the boundary shall consist of the area of rock within the embankment and the line of the interface string. Refer Figure 5. 7.2.3 Borrow Pits, Unsuitable Material, Stockpiling Calculations Where volumes are to be calculated on borrow pits, unsuitable material, rock excavation (non foundation) or stockpiles, the boundary shall be defined as the interface of the existing surface and the edge of the new excavation or stockpile. 7.3 Volumes Only software packages that use the prismoidal method shall be used for volume calculations and must use the following inputs: An existing surface and a fill/cut surface Boundary string of the area under consideration Each surface shall have a three dimensional string coincident with the boundary string, defining the level of the respective design and stripped ground surface.
If the 25 points in Figure 2 define the stripped ground, these points are to be triangulated and a three dimensional string (cross section) between A – B and C – D is to be created from the triangulation with the resultant two strings being included in the Embankment Foundation (stripped ground) surface. Figure 3 shows the resultant triangulation when these cross section strings between A – B and C –D are created and included in the models. Figure 3 – Full Triangulation For any volume calculations for Main Roads projects, where the coincident string along the boundary (Refer Section 7.2) does not reflect the shape of the surface, the generation of cross section strings detailed above shall apply. This shall particularly apply to surfaces defined by spot heights. 7.2.2 Rock (Embankment Foundation) Calculations Where rock is excavated wholly within the area of embankment, the boundary shall be defined as the extremity of the rock surface at the level defined by Specification 302 Earthworks - Rock Excavation. Where part of the area of rock to be excavated falls outside the toe of batter of the embankment (interface string), the boundary shall consist of the area of rock within the embankment and the line of the interface string. Refer Figure 5. 7.2.3 Borrow Pits, Unsuitable Material, Stockpiling Calculations Where volumes are to be calculated on borrow pits, unsuitable material, rock excavation (non foundation) or stockpiles, the boundary shall be defined as the interface of the existing surface and the edge of the new excavation or stockpile. 7.3 Volumes Only software packages that use the prismoidal method shall be used for volume calculations and must use the following inputs: An existing surface and a fill/cut surface Boundary string of the area under consideration Each surface shall have a three dimensional string coincident with the boundary string, defining the level of the respective design and stripped ground surface.
67-08-90%20Earthworks%20Volume%20Calculations%20Standard.RCN-D12^23434852.DOCX