Question

This problem is taken from Budhu's *Soil Mechanics and
Foundations*, 3rd ed. There is no solution to this problem
available on Chegg.

By consolidation test on a 20-mm-thick sample of soil shows that
90% consolidation occurs in 30 minutes. Plot a settlement (degree
of consolidation)-time curve for a 10-m layer of this clay in the
field for (a) single drainage; and (b) double drainage.
**Just one plot would be great.** Thanks in
advance.

Answer #1

**Assuming single drainage conditions.**

**Table for curve:**

time (t) (in min) | Consolidation (U) |

0 | 0 |

100000 | 0.119983332 |

200000 | 0.169682056 |

300000 | 0.207817227 |

400000 | 0.239966664 |

500000 | 0.268290887 |

600000 | 0.293897941 |

700000 | 0.317446058 |

800000 | 0.339364111 |

900000 | 0.359949997 |

1000000 | 0.379420611 |

1100000 | 0.397939694 |

1200000 | 0.415634455 |

1300000 | 0.432606056 |

1400000 | 0.448936521 |

1500000 | 0.464693447 |

1600000 | 0.479933329 |

1700000 | 0.494703952 |

1800000 | 0.509046167 |

1900000 | 0.52299522 |

2000000 | 0.536581774 |

2100000 | 0.549832702 |

2200000 | 0.562771712 |

2300000 | 0.575419847 |

2400000 | 0.587795883 |

2500000 | 0.599916661 |

2600000 | 0.693078 |

2700000 | 0.7009 |

2800000 | 0.70865 |

2900000 | 0.716138 |

3000000 | 0.7234 |

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