10. Fall cone penetrometer test has been carried out on a sample of fine grained soil and the following results were obtained: Cone penetration [mm] 16.1 17.6 19.3 21.3 22.6 Moisture content [%] 50.0 52.1 54.1 57.0 58.2 Describe the soil in accordance with BS using the cone penetration graph and plasticity chart (attached) and Eurocode 7, knowing the plastic limit of the soil is 18%, and the natural moisture content is 22%.

10. Fall cone penetrometer test has been carried out on a sample of fine grained soil and the following results were obtained: Cone penetration [mm] 16.1 17.6 19.3 21.3 22.6 Moisture content [%] 50.0 52.1 54.1 57.0 58.2 Describe the soil in accordance with BS using the cone penetration graph and plasticity chart (attached) and Eurocode 7, knowing the plastic limit of the soil is 18%, and the natural moisture content is 22%.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter4: Plasticity And Structure Of Soil

Section: Chapter Questions

Problem 4.8P

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Since laboratory or field experiments are generally expensive and time consuming, geotechnical engineers often have to rely on empirical relationships to predict design parameters. Section 6.6 presents such relationships for predicting optimum moisture content and maximum dry unit weight. Let us use some of these equations and compare our results with known experimental data. The following table presents the results from laboratory compaction tests conducted on a wide range of fine-grained soils using various compactive efforts (E). Based on the soil data given in the table, determine the optimum moisture content and maximum dry unit weight using the empirical relationships presented in Section 6.6. a. Use the Osman et al. (2008) method [Eqs. (6.15) through (6.18)]. b. Use the Gurtug and Sridharan (2004) method [Eqs. (6.13) and (6.14)]. c. Use the Matteo et al. (2009) method [Eqs. (6.19) and (6.20)]. d. Plot the calculated wopt against the experimental wopt, and the calculated d(max) with the experimental d(max). Draw a 45 line of equality on each plot. e. Comment on the predictive capabilities of various methods. What can you say about the inherent nature of empirical models?
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Please solve A only. Subject: Geotechnical engi A sample coarse grained soil is 50mm. In diameter and 150mm long was tested in a constant-head apparatus. The soil sample was prepared at a void ratio of 1.5. The total head was kept constant at 300mm and the amount of water is collected in 4 sec. was 50cm^3. The test temperature was 22°Ca.) Compute the temperature correction factor.b.) Compute the corrected coefficient of permeability in cm/sec. c.) Compute the interstitial velocity.
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Geotechnical laboratory tests were conducted to determine the liquid limit of soils. The data set shown in Table1 was obtained by using Casagrande's apparatus on Soil A (Plastic Limit = 32). The data set shown in Table 2was obtained by using Cone penetrometer on a different Soil B (Plastic Limit = 28).Table 1. Data from LL cup testing Table 2. Data from Cone penetrometer(a) Draw the Flow curve for soil A and B.(b) Calculate the Flow Index for both soils.(c) Calculate the Liquid limit for both soils.(d) Calculate the Plasticity and the Liquidity Indices for both soils, if both soils were found to havethe same current water content of 30%.(e) What can be said about the strengths of the soils in their current state?
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