Design Problem Preliminary Desi gn 



Page Tip : 

 Ccilci;lo-cd :. 

 Chockiid by: 



Dale : 



fOf of/33 

 J. R. W. 



ZO Mar. 73 



QuQy_WQll Caisson (cont.) 



5ummaf/on of Vertical Forces 



O.Z0ZLc+ 2.944 Lc-S.13Lc + Ry ^ O 

 Summation of Moments about A. 



0.202(j) Lit 2.94411 )lI ~5.l3li)Lf ^ J.^34 (i)l, 



l\i^ 



•f- 78Z = 

 O. 9/5 



Ylidtt) required to prevent negative 

 soil bearing pressure under caisson. 

 (Reaction iNithin middle ttii'nd) 



^SSi 



Lr = ^6 ft 



Slidin g 



Coefficieni of friction 



(concrete on sand) 



Vertical Force for L^ ' 3G ft 



/Js = 0.40 



IV = 5.151^= 5.1J>(SG) ^ fe>4J klft 

 5f "='0.102 Lcr-O.ZOL (3&) = -7.3 k/ft 



* Ry "^ vertical component of R. 



Table 1-14 



8-101 



