Text book on railroad surveying by Pickels George Wellington 1883-1944 & Wiley Carroll Carson 1884-

Author:Pickels, George Wellington, 1883-1944 & Wiley, Carroll Carson, 1884-
Language: eng
Format: epub
Tags: Railroads -- Surveying
Publisher: New York, J. Wiley
Published: 1914-03-25T05:00:00+00:00

If a fill is short and high the full allowance for settlement may make a hump in the grade line which may be very objectionable from the standpoint of operation. Of course this hump would ultimately disappear, but it may be preferable to avoid the hump by reducing the allowance for settlement and later to bring the track up to grade by the addition of ballast.

In case a bridge is placed in a high fill, the full allowance for settlement can not be made at this point. Extra care should be taken to compact the fill immediately behind the abutments in order to reduce the amount of settlement, and the track should be carefully maintained at these points until the embankment

is fully settled.

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Cross-Sectioning

100. Slope Stakes. Before construction work can be commenced, slope stakes must be set for the guidance of the contractor (1) at every full station, (2) at those intermediate points where the longitudinal slope of the ground changes, and (3) at other points required by special structures.

A slope stake is a stake that is set on each side of the center line at the point where the side slope of the cut or fill will intersect the ground surface. It has the cut or fill at that point (see settlement) marked on one side and the station number on the

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