. The street railway review . - out extensive experiments upon its sup-porting power, unprotected bj- piling or otherwise fromlateral displacement. Tiiis was done by means of smalltest piers of brickwork in hydraulic lime, built close to thefinished piers of the viaduct. The test piers were square above the footings and by feet onthe base, The tests were arranged in five groups, accor- ^h««l ^^wlwliy:^*^^ 219 (liii^ to till aiiLili- al wliich llu- l\)oliii^ were inclinations were 49% 55% 6o% 65. 69 . Tlieload was applieil In means of a heavy plate girder le
. The street railway review . - out extensive experiments upon its sup-porting power, unprotected bj- piling or otherwise fromlateral displacement. Tiiis was done by means of smalltest piers of brickwork in hydraulic lime, built close to thefinished piers of the viaduct. The test piers were square above the footings and by feet onthe base, The tests were arranged in five groups, accor- ^h««l ^^wlwliy:^*^^ 219 (liii^ to till aiiLili- al wliich llu- l\)oliii^ were inclinations were 49% 55% 6o% 65. 69 . Tlieload was applieil In means of a heavy plate girder le\er,having its fukruin uiuler the archway of one of thefinished piers ant! weighted at the other with tests were Liradualiy applied and distributed o\er thearea hv means of a saddle casting on the top of the pier,having a spherical socket. As might have been expected,the steeper angles stood the greater strain. The least strain. NATIVE METHOD OF SINKING A WELL. per sijuare foot at which any crack occurred was on apier ha\ing its footings at an angle of 49, and under apressure of tons per square foot. This crack was,however, in line with the face of the test pier and a settle-ment of somewhat over ]/i of an inch took place in thefoundation before the crack occurred; another pier withfootings at the same angle stood tons per square footwithout an}- crack. The greatest pressure resisted byan\ pier was on a pier with footings at an angle of 69 andunder a pressure of tons per square foot. The highest
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
