Simulate Soil Consolidation - Engineering Assignment Help

Assignment Task

Background Consolidation is the gradual changes in volume of a partly or fully saturated soil when subject to a sustained load. The changes are mainly due to the removal of gases, fuids and organic matter from the soil. We simplify our model to consider this matter as water.

A sample of soil shows the particles arranged with voids between them.

Soil can be composed of many minerals, primary silica, but clay, sand, shale, rock. Some of these have more water content than others. Water is present within soil and we can assume water is an incompressible fluid, where any pressure applied will cause the water to move to a lower pressure.
The water is effectively squeezed out of the soil very slowly. Soil consolidation has a huge impact on the planning and construction of buildings throughout history. The leaning tower of Pisa is a great example to showcase the importance of soil consolidation.

The purpose of the simulation is to determine:
how long consolidation will take for a given load and placement over a soil configuration
how much water is displaced during consolidation
what are the changes in height of the soil after consolidation
Simulation Input and Output
functionality for file input/output provided for you

The simulation will require information about the nature of the soil, the load, and the parameters used to simulate. These are read from a file using the three command line arguments. $ simulate.py <simulation parameters file path> <soil data file path> <output file pat
h>
Your program will read in a file for the simulation parameters from argument 1
Your program will read in a file for the soil geometry and composition from argument 2
Your program will write to a file for the results of the simulation from argument 3 For example:
$ simulate.py tests/params_example1.in tests/soil_example1.in sim_results_p1_s1.txt

Modelling of the problem
The modelling of soil consolidation in this assignment makes the following assumptions:

• soil particles have no air
• soil particles initially have a capacity to hold water and is considered full for example, if clay can hold 40% water, then at the beginning of the simulation, the clay particle holds 40% water.
• water is an incompressible fluid
• water moving out of a particle will cause the particle to compress
• any amount of water removed from a particle cannot be reintroduced
• soil particle categorisation is limited to Clay and Shale and only relevant to the initial conditions
• bedrock is an incompressible particle and will always provide an equal and opposite reactive force
• The void particle is a simple characterisation of representing a lower pressure area and it is assume to have no volume or capacity. A sand column could be represented as a lower pressure region, but as a void it has no capacity.

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