You are conducting a geotechnical analysis on a 3-layer soil system. Layer 1 is a 5-ft sand with dry unit weight of 100 pcf. Layer 2 is a 6-ft silty sand with a saturated unit weight of 115 pcf. Layer 3 is a 15-ft low plasticity clay with a saturated unit weight of 117 pcf. There is an unknown granular soil below the clay layer. The ground water table is at a depth of 5 ft. A structural footing with dimension 5ft x 5ft is placed on top of the top sand layer. The footing must carry a load of 50,000 lbs. i. Draw a schematic diagram of the layered soil system. Show all details (6) ii. Draw the distribution of effective stresses in the soil (15) iii. Determine the effective stress in the middle of the clay layer (5) iv. At time T ≈0 (i.e. immediately after the structural load is applied), what would be the changes in total stress, pore water pressure and effective stress in the middle of the clay? Assume entire stress due to the footing is transmitted to the clay. (12) v. At time T ≈α, (i.e. long time after construction), what would be the changes in total stress, pore water pressure and effective stress in the middle of the clay? (12) vi. Laboratory consolidation test on the clay soil produced the following graph for the soil. Calculate the consolidation settlement of the clay layer when a foundation is placed on top of layer 1. Make any other necessary assumption. (50) 0.1 1 10 100
In: Civil Engineering
According to conventional wisdom - the primary recurrent salient issues in most states tend to concern jobs, crime, education and taxes.
To what extent do public opinion poll data in Texas support or challenge the conventional wisdom?
In: Civil Engineering
In: Civil Engineering
6. A certain contaminant was studied in the laboratory by measuring over time the concentration in a sample placed in a closed container. The values of the observed concentrations are given below. Determine the reaction order and the decay rate for this contaminant.
Time (hrs) |
0 |
1 |
3.5 |
6.5 |
10 |
Conc (mg/L) |
100 |
80 |
50 |
26 |
10 |
In: Civil Engineering
Suggest an innovate treatment technology on either (environmental, energy production, optimization of process) ?
In: Civil Engineering
Write the parameters affecting on generation of more energy? Write the main steps to obtain more energy using waterfall simulator.
In: Civil Engineering
Dynamic tests on structures. Task of dynamic testing. Methodology and result assessment of dynamic test
In: Civil Engineering
Identify three structural concepts to provide a stiff load path for lateral load resistance
In: Civil Engineering
5. If you were sitting at Time Square handing out flyers and after an hour found where all the people with flyers were and connected their points of location, you have created a...
a) streamline
b) pathline
c) streakline
In: Civil Engineering
Use FARS to identify the following and submit in
blackboard
Pedestrian and Bicyclist fatal crashes in Indiana for: Indianapolis
and Terre Haute for 2015 to 2017
Factors to Investigate:
• Age
• Alcohol Test Results
• Crash Location
• First Harmful Event (i.e. cause of crash)
• Day of Week
• Time of Day
Map results of Indianapolis and Terre Haute separately
Produce tables of the data query
Write-up:
Describe what you found to be the leading causes of
fatalities.
In: Civil Engineering
In: Civil Engineering
Briefly discuss the significance of two main factors (list those 2 factors) in strength limit state design method used for safety in the context of a real-world structural steel design example.
In: Civil Engineering
List five types of common errors in taping. Select all that apply. Select all that apply.
Temperature
Remeasuring
Using hand signals
Tape length
Marking
Plumbing
Tape not level
Recording the results
please do not copy and paste the wrong answer .
In: Civil Engineering
. Write short notes on the following classifications of law: a. Case law b. Civil law c. Criminal law d. Public law.
In: Civil Engineering
explain step by step, how do you design a mat or raft foundation? when do you opt for raft foundation?
In: Civil Engineering