Other than the tradeoff for less excavation and backfill versus the shoring box rental for Exercise 7,

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Other than the tradeoff for less excavation and backfill versus the shoring box rental for Exercise 7, what are some additional complications and potential costs an estimator might consider for a slope cut of this magnitude?

Data from exercise 7

The contractor installing the sewer pipe in Figures 16.3 and 16.4 chose a moveable trench shoring system over a 1:1 slope cut excavation. Calculate the contractor’s overall savings for this approach utilizing the excavation conversion process and pricing discussed with structural excavation in Chapters 6 and 10. Assume the native soils are sufficient for backfill.

Figures 16.3

Tri-County Conveyance Pipeline - Estimate Bid Item: 4- Install 18" PVC Sanitary Sewer Quantity Description

Figure 16.4

 1 10' across Shoring box option 2' 18"-2' <5'-5" at bottom > 25'-5" at top Conventional slope-cut excavation

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Construction Cost Estimating

ISBN: 9780367902681

1st Edition

Authors: John E. Schaufelberger, Len Holm

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