Plan drawing showing the position of each borehole

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Reference no: EM13861048

This coursework need to do by expert has perfect experience in this topic.

Full Harvard style citing and referencing is required throughout this piece of work.

Preamble

Over the past two years we have noticed that some of the BEng students are frankly, rubbish at generating geotechnical cross sections from borehole data. Item 1 of this coursework is intended to address this shortcoming and prepare you for the group design project next semester. In addition this item will require you to determine some soil parameters from the borehole data. By comparison, item 3 requires you to explore the more rigorous means of obtaining soil parameters as detailed in EC7:

Part 2, Ground Investigation and Testing. Item 2 requires you to research some of the underlying principles of critical state soil mechanics.

A formal submission is expected with a cover sheet as posted on WOLF. Your submission must include a written introduction, briefly describing the work contained and an appraisal of what you feel you have learnt from this assignment. Full Harvard style citing and referencing is required throughout this piece of work.

This coursework covers the following areas ;

1. Practical Geotechnical Engineering, (with BoQ and costings)
2. Critical State Soil Mechanics
3. Slope Stability Design to EC7
4. Presentation, appraisal and appropriate Harvard referencing

1. Practical Geotechnical Engineering (including costing)
Loaded onto WOLF (under this module topic) are nine boreholes from the i54 development site. Your task is to;

a) Produce a plan drawing showing the position of each borehole (coordinates are given with the borehole logs) and from your plan drawing, justify the best position for a cross section to be placed.

b) Generate a hand drawn cross section showing the soil profiles present on the site. Include a suitable legend.

c) Based upon your cross section, determine initial parameters from which preliminary pile designs could be made. (This requires you to determine how to design piles and then to justify any correlations you make from the borehole information to the pile design).

d) Based upon your cross section, comment on the availability of suitable material to be used for road layer-works and backfill behind any retaining walls.

e) Produce a detailed Bill of Quantities with an estimated cost of the piling works. You may assume 500mm diameter piles, 18m long. Pile caps at 10m centres over a 100m x 100m plot, with 3 piles per pile-cap.

2. Critical State Soil Mechanics

(a) Describe with the use of suitable diagrams the critical state strength of soil.

(b) State the critical state parameters and briefly describe the laboratory tests that can be used to estimate them.

3. Slope Stability to Eurocode 7

Example 5.12 in Smith (8th Edition) presents a Eurocode design approach to a slip circle analysis, previously presented as example 5.6. Critically evaluate the two approaches, detailing:

(i) the different vocabulary used, in particular clearly define the difference between a factor of safety and an over-design factor.

(ii) discuss the potential technical uncertainty with the parameters used in example 5.6 as compared with the parameters used in 5.12. Note that this is assuming that the parameters used in 5.12 have been determined in accordance with EC7 part 2. Hence you need to describe how the parameters are obtained in accordance with EC7 part 2 and discuss if you feel that these parameters are more reliable.

(iii) Quantify the impact of technical uncertainty by running example 5.6 with a range of realistic parameters and discuss the outputs.

4. Presentation, Appraisal and Harvard Style Citing and Referencing

A formal submission is expected with a cover sheet and contents page. Your submission must include a written introduction, briefly describing the work contained and an appraisal of what you feel you have learnt from this assignment. Full Harvard style referencing is required throughout this piece of work.

Verified Expert

The assignment discusses the design aspects of a borehole, the significance of soil profile and the financial and equipments required for the same. It also discusses the critical state of the soil and it's parameters. Then the Euro code 7 and it's application are mentioned.

Reference no: EM13861048

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Reviews

inf861048

3/24/2017 6:24:54 AM

Last Friday I was kicking the bucket, this Friday I'm excited and I owe everything to you all for your understanding and demonstrable skill. I ridiculously welcome you all requiring some serious energy with me to console me. It was your messages that were keeping me grounded and quiet. Many many thanks to you.

inf861048

3/24/2017 6:23:50 AM

Do we need to prepare a report? If yes what type of report ? Please provide specific details. and 2. If possible please send the example 5.12 and 5.6 from the referred text for part 3 of the assignment. it is given that The boreholes from the i54 sites are loaded to WOLF under the module topic.I am unable to access those. please inform to send information regarding the same soon. Because without that the diagram cannot be constructed. Critical state theory discusses the Roscoe surface and the Hvorslev surface, describe your understanding of these surfaces. a sample of an isotropic saturated clay is consolidated in a triaxial cell under an isotropic effective mean pressure 4000 kN/m2 . Clay is characterised by the following constants. ?= 0.0095, k = 0.035, ?=2.0, M=0.9 Once consolidation is complete determine the pecise nature of stress paths assuming that the sample is sheared under undrained conditions until the occurrence of failure. 21983579_1i54 Boreholes.pdf

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