The 'strut and waler' support system in a braced excavation works as:
Choose the correct answer
The struts carry tension like cables
Horizontal compression members (struts) supported by walers distribute active earth pressure across the excavation
Only for water control (no structural role)
Struts are always pre-cast concrete panels
Correct Answer
B. Horizontal compression members (struts) supported by walers distribute active earth pressure across the excavation
Why is this the answer?
Braced excavation: as excavation proceeds, horizontal steel struts (or tie-backs) installed at intervals to support sheeting/piling. Walers: horizontal beams distributing load from sheeting to struts. Struts: horizontal compression members transmitting force across excavation. Hydraulic struts: allow pre-loading to reduce wall deflection. Failure modes: strut buckling (slender struts), waler failure, strut connection failure.
Related Soil Mechanics MCQs
More solved Soil Mechanics questions for AE/JE Civil Engineering exams.
- The 'Hvorslev parameters' c_e and φ_e in soil mechanics refer to:
- The 'International Building Code' (IBC) and IS codes classify building sites for...
- 'Vibro-flotation' (vibro-compaction) is used to densify:
- The 'primary consolidation' of a clay layer settles because:
- The 'IS 2911' code series covers:
- The 'shear strength' of soil measured in an 'undrained triaxial test' (UU test) is:
Practice more Civil Engineering questions
This MCQ belongs to JE Level Premium Test Series. Full tests include timed attempts, rank comparison and subject-wise analysis.