MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, 9th Edition, [Instant Access], 2 terms (12 months)
9th Edition
ISBN: 9781305971257
Author: Braja M. Das; Khaled Sobhan
Publisher: Cengage Learning US
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Chapter 5, Problem 5.1CTP
The subsurface characteristics for a highway pavement rehabilitation project in the southeastern United States are shown in a “boring log” in Figure 5.13. The highway structure consists of the asphalt pavement underlain by four different soil strata up to a depth of 20 ft, after which the boring was terminated. Some data on the grain size and plasticity characteristics are also provided for each stratum. Perform the following tasks:
- 1. Determine the AASHTO soil classification and the group index (GI) for each layer.
- 2. Determine the “most probable” group symbols and group names for the various layers according to the Unified soil classification system. Use Table 5.3 and the soil characteristics given in the boring log.
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- A cohesive soil sample is subjected to an unconfined compression test. The sample fails at a pressure of 3850 lb/ft2 [i.e., unconfined compressive strength lb/ft2]. Determine the soil’s cohesion.arrow_forward2.7 The results of a liquid limit test and a plastic limit test on a sample of soil are given below: liquid limit cone penetration (mm) water content (%) 21.2 56.0 23.2 24.7 14.8 50.8 16.9 19.1 52.9 54.2 57.3 58.7 plastic limit water content of threads (%%) 26.6 and 27.3 Determine the liquid limit, plastic limit, plasticity index and soil classification,arrow_forwardPlz, solve this problem as detail. Geotechnical Engineering-1arrow_forward
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How Are Highways Designed?; Author: Practical Engineering;https://www.youtube.com/watch?v=9XIjqdk69O4;License: Standard Youtube License