Question

The singly-drained clay layer has a coefficient of consolidation of 20 ft2 lyr. The layer is subjected to a uniform vertical stress increase of 100 kPa. Determine the value of the excess pore pressure at point A 2 years after the application of the load. Also given is the chart giving the local degree of consolidation. Sand 15' A 26 Clay bedrock (impermeable) 0 0.06 Clay bedrock (impermeable)

Answer 1

(oo Ka P Ils and A5! clay imbermeable Rock. Initially all the porre a surcharge will be taken by hare water leading to generation of initial fore water loo kapa hence M = 100 kPa know that of More 2² it ha bottom layer is impermeable bence Case of single drainage Note as the suscharge is acting uniformly hence increment of stress will be some location PWP) Excess wp after 2 years t-ayr application of loading. hat every

Dale Page No The 20 ) you Zuz x 2 years Ty 0.1 amuning u < 6ool then Degree of consolidation Tue 4 loox tore x )? o 1 x Yoo M T M = 0.3568 X100 35.68 Hence our assumption is true Now we APWP); - (Pulsyn at the Note know that Degree of Romolidation Pop), - Poopy end of Consolidation (PWP) Excent pose water pressure 0-3568 (PWP) (-2yr 7Pul) 35.68 ftpop), YA Too-35.68 F 64.32 Kla t-syrim loo + को Failure comes only when we forget our ideas and objectives and papewa ura Nehru Cara