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ç¿»è¯ï¼The earth quantity calculation method
A, scattered points
According to the existing terrain, determine project slices flat field. According to landform condition selecting earthwork calculation method. Within each project piece here though ups and downs, but terrain change is evener, not too complicated. So scattered points by calculating the earth quantity.
Process is: sure tian face design elevation, and the average depth calculated dig fill dig fill area calculation and TuFangLiang dig fill calculated. The method is as follows:
1, sure tian face design elevation H: (considering digging as possible, can fill earthwork reference field balancing face average height Ha)
Ha = (H1 + H2 +... + Hn) / n
Type: Ha for the behaviors of average height (m);
H1, H2... For the point elevation Hn (m);
N for elevation point number.
2, the average depth: dig fill calculated
Fill district average fill high: ht = H - â ht/L
The average grade area dig deep enough: hw = â hw/m - H
Type: L for measuring the number of less than H measuring height;
M for measuring the number of greater than H measuring height;
Ht for elevation the point less than H elevation (m);
Hw H for elevation than the point elevation (m).
3, dig fill area calculation:
Fill area: At = Aa x ht / (ht + hw)
Engineers area: Aw = Aa x hw / (ht + hw)
Type: Aa total for plot soils.
4 TuFangLiang calculation, digging fill
Fill quantity: n = At x ht
Capacity: engineers Vw = Aw x hw
5, (TuFangLiang planting soil surface stripping) calculated
Need to determine thickness, stripping excavation area detachment, backfilling start-stop depth, fill area detachment, backfilling start-stop height
For example: this project by 15cm plan, surface thickness excavation depth excavation area, not less than 10cm, elongate-shaped detachment; Fill area, fill the depth of not less than 40cm elongate-shaped detachment; According to the relative size of the dig soil fill 30cm (stripping multiplied by planting 15cm layer 15cm) and backfilling layer.
Fourth step: land leveling TuFangLiang aggregate
Each district of TuFangLiang plus each work area dig fill the sum, namely TuFangLiang planting soil for land leveling TuFangLiang.
B, scattered points (area weighted)
First of all, according to the status quo elevation points each lattice, preliminary field each lattice field design elevation worked, then press the status of weight control area elevation points, calculation of each lattice field excavation, fill, then according to the minimum amount of
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