18-Env-A3 Geotechnical and Hydrogeological Engineering
Worked solutions to 14 past sittings (2013–2019), 84 questions. Pick a sitting, or start from a topic below.
- December 2019
- December 2018
- May 2018
- December 2017
- May 2017
- December 2016
- May 2016
- December 2015
- May 2015
- December 2014
- May 2014
- December 2013
- May 2013
- Undated paper
Topics across the sittings
Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.
- Tracer Travel Time (5 sittings): December 2018 Q4 · May 2018 Q6 · December 2017 Q4 · December 2014 Q6 · May 2013 Q6
- USCS Classification (4 sittings): May 2018 Q2 · May 2016 Q2 · May 2015 Q5 · May 2014 Q2
- Compaction (3 sittings): May 2015 Q1 · December 2014 Q1 · May 2014 Q1
- Flow Net (3 sittings): December 2016 Q2 · December 2015 Q2 · May 2015 Q2
- Landfill Cover Suitability (3 sittings): May 2018 Q2 · May 2015 Q5 · May 2014 Q2
- Cantilever Retaining Wall (2 sittings): December 2015 Q6 · December 2013 Q6
- Confined Aquifer (2 sittings): December 2013 Q3 · May 2013 Q6
- Discharge (2 sittings): December 2018 Q4 · May 2018 Q6
- Flow Net Analysis (2 sittings): December 2014 Q3 · May 2013 Q3
- Flow Rate (2 sittings): May 2015 Q2 · May 2013 Q6
- Seepage (2 sittings): May 2018 Q3 · May 2016 Q3
- Soil Phase Relationships (2 sittings): December 2017 Q1 · May 2017 Q1
- Surcharge (2 sittings): December 2015 Q5 · May 2013 Q5
- Unconfined Aquifer (2 sittings): May 2015 Q4 · December 2014 Q6
- Well Drawdown (2 sittings): December 2015 Q4 · December 2014 Q6
Questions by sitting
December 2019
- Question 1: Phase Relationships from Moist Weight and Volume
- Question 2: Phase Relationships of an Undisturbed Block Sample
- Question 3: Seepage Through a Sand Seam Beneath a Levee
- Question 4: Steady Radial Flow to a Municipal Water Supply Well
- Question 5: Primary Consolidation Beneath a Circular Footing
- Question 6: Factor of Safety of a Cut Slope (Culmann's Method)
December 2018
- Question 1: Soil Sample Phase Relationships
- Question 2: Earthwork Hauling and Dam Weight
- Question 3: Seepage Through a Zoned Earth Dam
- Question 4: Discharge and Tracer Travel Time, Unconfined Well
- Question 5: Falling-Head Permeameter Test
- Question 6: Landfill Leachate Collection Through a Clay Liner
May 2018
- Question 1: Phase Relationships of an Undisturbed Soil Sample
- Question 2: USCS Classification and Landfill Cover Suitability
- Question 3: Seepage and Tracer Travel Time Beneath an Earth Dam
- Question 4: Primary Consolidation of a Clay Layer Beneath a New Sand Fill
- Question 5: Bearing Capacity of a Square Footing (Concentric and Eccentric Loading)
- Question 6: Unconfined Aquifer Pumping Well — Discharge and Tracer Travel Time
December 2017
- Question 1: Soil Phase Relationships
- Question 2: Earthwork — Hauling and Compaction-Water Trucking
- Question 3: Seepage Beneath an Earth Dam with a Partial-Penetration Cutoff Wall
- Question 4: Confined Aquifer Pump Test — Hydraulic Conductivity and Tracer Travel Time
- Question 5: Primary Consolidation of an Overconsolidated Clay
- Question 6: Falling-Head Permeability Test
May 2017
- Question 1: Soil Phase Relationships
- Question 2: Seepage Under a Concrete Gravity Dam with a Toe Cutoff
- Question 3: Particle Size Distribution and Gradation
- Question 4: Consolidation of a Clay Layer Under a Gravel Fill
- Question 5: Well Hydraulics in an Unconfined Aquifer
- Question 6: Plane (Wedge) Slope Stability — Dry and Rain-Saturated Conditions
December 2016
- Question 1: Weight–Volume Relations of a Soil Sample
- Question 2: Flow Net and Uplift Force on a Tunnel in an Embankment
- Question 3: Differential Settlement of Two Foundations on a Variable-Thickness Clay
- Question 4: Falling-Head Permeameter on a Three-Layer Sample
- Question 5: Anchored Sheet-Pile Wall — Active Thrust and Tie-Rod Tension
- Question 6: Stress Distribution and Consolidation Settlement Under a Large Foundation
May 2016
- Question 1: Weight–Volume Relations of a Soil
- Question 2: Grain-Size Gradation & USCS Classification
- Question 3: Seepage & Uplift Beneath a Concrete Gravity Dam
- Question 4: Unconfined Aquifer Well Yield & Source-Water Protection Area
- Question 5: Preload Consolidation of a Saturated Clay Layer
- Question 6: Bearing Capacity of a Square Footing
December 2015
- Question 1: Index Properties from a Moist Soil Sample
- Question 2: Seepage Under a Dam with a Heel Cutoff — Flow Net
- Question 3: Aggregate Compaction — Quantity and Cost
- Question 4: Anisotropic Unconfined Aquifer — Well Drawdown
- Question 5: Rankine Active Force — Two-Layer Backfill with Water Table and Surcharge
- Question 6: Cantilever Retaining Wall — Active Force and Overturning Stability
May 2015
- Question 1: Compaction — Porosity, Saturation and Unit Weights
- Question 2: Seepage Under a Dam — Flow Net and Flow Rate
- Question 3: Drainage-Ditch Slope Stability, φᶜ ≈ 0
- Question 4: Unconfined Aquifer — Well Discharge and Drawdown
- Question 5: USCS Classification and Landfill Cover Suitability
- Question 6: Stresses Under a Point Load (Boussinesq)
December 2014
- Question 1: Compaction — Weight–Volume Relations from Mold Dimensions
- Question 2: Borrow-Pit Excavation Volume & Truck Fleet Sizing
- Question 3: Seepage Beneath a Concrete Dam with End Cutoffs — Flow Net Analysis
- Question 4: Total & Effective Stress Before and Immediately After Fill Placement
- Question 5: Direct Shear Test — Shear Strength Parameters & Method Comparison
- Question 6: Unconfined Aquifer — Well Drawdown & Tracer Travel Time
May 2014
- Question 1: Compaction — Weight–Volume Relations
- Question 2: USCS Classification & Landfill Cover Suitability
- Question 3: Seepage Beneath a Dam & Impervious Blanket
- Question 4: Consolidation Settlement of a Clay Layer
- Question 5: Undrained Slope Stability (φ=0)
- Question 6: Well Hydraulics in an Unconfined Aquifer
December 2013
- Question 1: Proctor Compaction — Water Addition and Borrow Volume
- Question 2: Falling-Head Permeameter — Landfill Cap Suitability
- Question 3: Confined Aquifer — Steady Radial Flow to a Pumping Well
- Question 4: Field and Laboratory Program for Consolidation Settlement
- Question 5: Seepage Under a Dam With a Partial Cutoff (Sheet Pile)
- Question 6: Cantilever Retaining Wall — Tipping and Sliding Stability
May 2013
- Question 1: Aggregate Base Material — Moisture Content and Compacted Volume
- Question 2: Variable-Head Permeability Test
- Question 3: Seepage Under a Concrete Dam — Flow Net Analysis
- Question 4: Slope Stability of a Drainage Ditch — Taylor's Stability Chart
- Question 5: Rankine Active Force on a Retaining Wall — Two-Layer Sand with Groundwater and Surcharge
- Question 6: Confined Aquifer — Flow Rate and Tracer Travel Time
Undated paper
- Question 1: Phase Relationships in Natural Conditions
- Question 2: Constant-Head Permeability Test
- Question 3: Seepage Beneath a Retaining Wall
- Question 4: Well in a Confined Aquifer
- Question 5: Consolidation Settlement Beneath a Square Footing
- Question 6: Slope Stability — Ordinary Method of Slices