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<br />~ <br />['- <br />~ <br />N <br /> <br />xu <br /> <br />CONTENTS <br /> <br />c <br /> <br />CHAPTER V-TUNNELS, ANCHORS, AND <br />SUPPORTS <br /> <br />TUNNELS <br />&c#oo Page <br />89. General description___w__________~ __u ~________________________ 135 <br />90. Construction adits_ _ _______n_________h___h__ __h_h___n___ 138 <br />91. Lower penstock and outlet tunnels_h____n______h______uu___ 138 <br />92. Upper penstock and outlet tunnels___h__h________________n___ 141 <br />93. Grouting and drAining lOl\er tunneIs_____h_________h____n_hh 143 <br />94. Grouting and draining upper tunnels__hh_hu_h_______h_____ 146 <br /> <br /> <br />ANCHORB <br /> <br />95. General requirements and desigu,.__u_______uu____________h__ 147 <br />96. Terminal anchors_ _____ ______ ____________________._ ___________ 148 <br />97. Intermediate anchors__~______ ________ ____.____._______________ 154 <br />98. Supplemental anchorsn ______nn___h__ ___ _____h___hh_____ 160 <br /> <br />SUPPORTS <br /> <br />99. ~ers________________________________________________________ 163 <br />100. Thrust blocks_ _ _ ______ ______n_n___n_________h_____ h_____ 165 <br />101. Cradles_________________________________________________.____ 167 <br /> <br />CHAPTER VI-DEVELOPMENT, INSPECTION, <br />AND TESTING OF STEEL PLATE <br /> <br />DEVELOPMENT OF STEEL PLATE <br /> <br />102. Requirements of specitications____________h.n______u____n__. 169 <br />103. High-strength steel adopted_____________~_n___h_____.___hU_ 170 <br />)04. Experimental investigatioDs_________u____n_ _ _________________ 170 <br /> <br />YIELD STRENGTH AND TOUGHNESS <br /> <br />105. Effects of heat.treatment.____h____h____h____uh_h________ 173 <br />106. Results of test,____n___h_n______n"__n___._h_________n___ 174 <br />107. Summary and conclusions_n_nh_u_________n______h________ 178 <br /> <br />IMPACT VALUES <br />108. Introduction_ _ _ _n___n ________ n_ __ n__ n_ n_ __n____ __n___ 179 <br />109. Impact tests__n_ nh__________nh ___n_n______ _______n____ ISO <br />no. Temper brittleness____________h_h______n_______________hh 182 <br />Ill. Summary____________________________________________________ 183 <br />112. Reiidual stresses in steel pJates_ ______h.u_____~___________h__ 183 <br /> <br />INSPECTION AND TESTING <br /> <br />113. Chemical composition of plate_nn_n___nu____n.__.n___hn 184 <br />114. Physical properties__ ____ ___ __ ____ _""'__ _ _ _______________________ 185 <br />115. Increasing yield strength by normaliziiig________n_______________ 187 <br /> <br />~ <br />