(1) a hard time preparationsPlot li

(1) a hard time preparations
Plot line and mark the height of pile in, confirm the position of the pile in. Information collection and become familiar with the specifications.
(2) where the callout control points
Locus of control refers to the influence of road longitudinal slope design of elevation points. Such as route, destination, key bridges and culverts, adverse geological sections of the minimum fill, maximum digging depth, main buildings along the roads, intersections and other factors limit the elevation of the road through the control points, and so on.
(3) test
Try slope mainly in the already marked "control points" Profile based on the intentions of technical indicators and line selection, combined with the up and down, in a "control point" basis, taking into account the majority of "economic" principle, in interludes between those points and cut-off straightened, try to set aside a certain straight slope line. To compare all possible straight line again, elect conforms to the technical standards, and meet point requirements and early earthwork design lines in the province as straight lines, straight slope line extension, set the initial position of grade change.
(4) adjustments
After the trial, will be set by the longitudinal line longitudinal to consider when comparing both should meet. If there is a difference, it should conduct a comprehensive analysis to find out the causes, checked against the specification and design of maximum longitudinal slope, slope gradient and slope length of synthesis and so on whether met regulatory requirements, coordination of horizontal alignment and vertical alignment the desirability and so on.
(5) check
According to the adjusted straight slope line, select the cross section of key controls, such as the high fill retaining wall in deep excavation, and an important bridge and culvert sections, read out the corresponding directly to the Profile in the piles of fill (dig) height and check for cut and fill, slope foot fall to the ground or retaining the.
(6)
After adjustment check that can be set. Are piecewise straight lines of slope gradient, grade change point position (number) and elevations determined. General to adjust the grade change point to 5M or 10m on the whole, change of elevation based on longitudinal slopes, slope lengths in turn calculated to determine.
(7) the longitudinal design results as shown in table 1