Laserfiche WebLink
-23- <br />• same geologic conditions. These cuts have been excavated at <br />steeper slopes, and the stability problems in them are either <br />non-existent or of a very minor importance. For this reason, <br />we feel that a cut slope of slightly more than 45 degrees is <br />well feasible within this formation. We feel, however, that <br />the cut height of approximately 60 feet should not be exceeded. <br />This recommendation is again based on the observation of the <br />present cuts, We feel that, if higher cuts are required, they <br />should be designed individually. Retaining forces, such as <br />retaining walls, or different, more conservative cut configura- <br />tions, should be applied. <br />Plate 9 D shows a design_cross_section_for a cut located <br />-------------------- ----------------- <br />• in colluvial soils. Because these colluvial soils experience <br />------------------ <br />significantly less favorable behavior than the terrace deposits, <br />our cut elope recommendation is 1 1. We feel that a slope <br />steeper than 45 degrees will result in significant sloughing <br />from the cut and potential stability problems. As in the <br />previous case, we recommend that the height of the cut be <br />limited to less than 60 feet. Any higher cut should be designed <br />individually using retaining walls or more conservative cut <br />configurations. <br />Recommended cut slopes for individual formations are tabulated <br />in Table 2, Recommended Cut Slopes. (See page 24.) <br />• <br />