ACT Retaining Structures, Groundwater, Commercial Frame Building

What is a Gravity Retaining Wall?

• A vertical wall that relies on soil pressure for support

• A vertical structure supported by nails

• A wall that uses its own weight to resist lateral earth pressure

• A wall supported by sheet piles

Which soil type has the steepest angle of repose in its drained condition?

• Wet Clay

• Drained Clay

• Wet Sand

• Dry Sand

Which one of these is a form of embedded retaining wall?

• Cantilever retaining wall

• CFA Piling

• Sheet Piling

• Gabion Baskets

Which of the following dewatering techniques involves using electric current to move water in clayey soils?

• Bored well

• Freezing

• Open sump pumping

• ELectro-osmosis

What role does the bentonite slurry play in diaphragm wall construction?

• To keep the excavator heads clean

• To prevent collapse of the excavation before filling with concrete

• To reduce the volume of concrete required and therefore reduce carbon footprint

What type of soil improvement involves applying long-term loads to compress and consolidate the soil?

• Surcharging

• Compaction

• Soil Replacement

• Grouting

In multi-storey framed commercial buildings, lateral stability is important for resisting which type of forces?

• Internal wall forces

• Forces due to weight of furniture

• Vertical forces from floors

• Horizontal forces like wind and seismic activity

A portal frame structure is best suited for which type of building?

• Tall residential buildings

• Large open spaces with wide spans

• Small houses with many rooms

• Structures requiring frequent modifications

What is a major advantage of using Cross Laminated Timber (CLT) in construction?

• It is more flexible than steel in shaping complex designs

• It can support spans of over 100 meters

• It allows for fast on-site assembly due to prefabricated panels

• It is completely fireproof

What is a key characteristic of a portal frame structure?

• A rigid structure with minimal deflection

• Use of lightweight materials for small residential buildings

• Hinges and pins that reduce bending moments at the foundation

• Columns and beams that support very short spans only