Journal . sq. in. on area A for overcoming theresistance of the ground which should fall within the safestrut value of timber and sheet piles. A* = Resistance to driving in tons = _ *r ? or ^rp- It will be seen that for a given class of pile the value of >? willreach a definite limit corresponding with h and p for each ratiop^z, so that it follows that similar piles driven against a certain pressure p bv a hammer falling h will show the same set per Wblow if the ratio of -j- is the same. pThus for a definite height of fall, p and ==, the set per blow YV measured from the curves for a 2-ton
Journal . sq. in. on area A for overcoming theresistance of the ground which should fall within the safestrut value of timber and sheet piles. A* = Resistance to driving in tons = _ *r ? or ^rp- It will be seen that for a given class of pile the value of >? willreach a definite limit corresponding with h and p for each ratiop^z, so that it follows that similar piles driven against a certain pressure p bv a hammer falling h will show the same set per Wblow if the ratio of -j- is the same. pThus for a definite height of fall, p and ==, the set per blow YV measured from the curves for a 2-ton hammer driving a 14in. bv W14in. pile would be identical for other ratios of -j, as for instance a 1^-ton hammer on a 12in. by 12in. pile. 138 THE IMPACT OF IMPERFECTLY ELASTIC BODIES. £ lii z: UJ o DC O u, tj 10 <c o o m UJ nr fi£ o .J K Z D 2 z < i 1 * U- Z o h- O Oi Z <M UJ O Ul K t/7 D O <«. a-* ADN30IJJ-3 THE IMPACT I ELASTIC BODIES. 139 Curves of Efficiency j of hammer blow for. fall okiying steel tube (PREPARATORY PILE TUBE l^oiAi-^i^.W, DTTtO VITrt HEIMET, WOOD CAP A CONICAL SNOE\) & SET PER BLOW or J ton RAM when DRIVING. To CAST 17-I8oia VlBROCOWCRETE PILES ~IG 3 LCHC7H Of PTVE TU6E 2° 30 i+o 50 go
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Keywords: ., bookcentury1800, bookdecade186, bookpublisherlondon, bookyear1861
