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<br />I"? <br />go <br />~ <br />N <br /> <br />1 <br /> <br />.0 <br /> <br />:x: <br /> <br />IMPERIAL DAM AND DE SILTING WORKS <br /> <br />TESTS OF FOUNDATION MATERIALS <br />Section Page <br />31 Test holes in foundation Brea________________________u__u_____ 45 <br />32 Sampling methods and equipm_enL_____uuuu__u____________ 46 <br />33 Density and shearing strength_________________________u_______ 48 <br />34 Classification of materials_____________ _____________ ____________ 49 <br />35 Shear test procedurehU_________u__u________________u_____ 49 <br />36 Sources of error in shear tests____________________________hUU 51 <br /> <br />TESTS OF COMPACTED EMBANKMENT MATERIALS <br /> <br />37 Object and scope of tests______________________________________ 51 <br />38 Field investigations______________ ________ _____________________ 52 <br />39 Laboratory analyses_ _ _ ______ ______ __ n ___ _ ______ _____________ 53 <br />40 Compaction curves_ _ __ ____________ _______ ____________________ 53 <br />41 Rate of percolation_______________________ ______________h____ 54 <br />42 Delimitation of borrow-pit areas____u_______________u_________ 56 <br />43 Observations____________________________ ____u ____ ___________ 56 <br />44 Tests during constructioD___________________________n__u_____ 57 <br /> <br />AGGREGATES AND CONCRETE <br /> <br />45 Exploration and tests of ma.terials_____________________u_______ 58 <br />46 Concrete tests with aggregate from station 90 depositn__n_______ 61- <br /> <br />CHAPTER III-DESIGN OF DAM <br /> <br />GENERAL DESCRIPTION <br /> <br />47 Weir and nonoverflow structures_____n________n__n__________ 63 <br />48 Foundations_________________________________________________ 63 <br />49 Aprons------------------------------------------------______ 65 <br />50 Drains______________________________________________________ 65 <br />51 Service bridge and trashracL__n____n________________________ 66 <br />52 All-American Canal desilting works_____________________________ 66 <br />53 Gila. Canal desUting works__ u _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ _ __ _ __ _ __ __ _ _ 67 <br />54 Canal sectiollS____ u_____________________________________hh 67 <br />55 Data for design_n__u______________n____n____nn_________ 67 <br /> <br />PRELIMINARY STUDIES OF OVERFLOW WEIR <br /> <br />56 Gener~types--------------------------------------------____ 68 <br />57 Hollow concrete sections____________________________nu______ 68 <br />58 Rock-fill damB_ _ ______ ______ ___ ___________ ______ _____________ 70 <br />59 Ogee section________u________________________u_____________ 71 <br />60 Indian weirs_________________________________________________ 71 <br />61 Selection of type of dam_____n___u______________________n___ 73 <br /> <br />DETAILS OF DESIGN <br /> <br />62 Plans and specifications_______nn____n__n__________n______ 74 <br />63 Unit working stressesu_____n______n______________u___un_ 75 <br />64 Pile footings_ _________________n______________________u_____ 77 <br />65 Static-load resistance of piles__u____n_____________n______u__ 80 <br />66 Foundation dramage__________________________________________ 83 <br /> <br />CALIFORNIA ABUTMENT <br /> <br />67 Description___________ ____________ ____________ _______________ 87 <br />68 Slab 10adB___________________________________________________ 89 <br />69 Design of buttresses___u___u_________n_____________u______ 89 <br />