Find the maximum permissible depth ( H ) of the cut before the occurrence of heaving.

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Q14. A contractor is excavating the below trench. The contractor is supposed to dig the trench 5ft deep and 3ft wide. The soil was tested to have an approximately swell factor of 112% and a shrinkage factor of 14%. The contractor is placing a 10" water pipe in the trench and then backfilling with the soil that was removed. The dimensions are on center line. Does the contractor have enough soil to backfill the trench, or will he /she have to need more? If more soil are needed, how much does the contractor need to bring in. Answer in LCY. 40ft 3ft 16ft 40ft 20ft 24ft 60ft

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Chapter 9, Problem 9.9P

To determine

Find the maximum permissible depth (H) of the cut before the occurrence of heaving.

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Q14. A contractor is excavating the below trench. The contractor is supposed to dig the trench 5ft deep and 3ft wide. The soil was tested to have an approximately swell factor of 112% and a shrinkage factor of 14%. The contractor is placing a 10" water pipe in the trench and then backfilling with the soil that was removed. The dimensions are on center line. Does the contractor have enough soil to backfill the trench, or will he /she have to need more? If more soil are needed, how much does the contractor need to bring in. Answer in LCY. 40ft 3ft 16ft 40ft 20ft 24ft 60ft

Define sand-cone method.

Answer the number shown below for the least horizontal deformation and settlement and for the most settlement. The braced excavation type of (3) below is chosen for the construction of subway station and ground settlement is expected to be more than allowable due to the drawdown of ground water. What do you think you should consider to reduce the settlement? 1) Slurry wall 2) CIP continuous wall 3) Soldier pile and woodlagging wall 4) Soldier pile and concrete wall