. The Chinese railway system . :«! §o ■i ! 7 1 ^i ^ c u •a In 3 in so aa § so OB OQ ~1 ^ Reinforced Concrete Pile Scale V2=—. O/el B^i/rr Tvhe Or &»/. Jro/iW^oum^ /ran 4 ir/re tM»fe ^^1- 4<k- ffC-zi. XotmJ /ratt Fig. lA. To face page 183. REINFORCED CONCRETE ON THE CHINESE RAILWAYS 183 chippings and coarse river sand. An expansion joint oneinch wide was put in every 30 feet. The width of this isexcessive as from observations made in the followingwinter the total contraction amounted to only y^,. Thetotal variation in temperature was 76° Fah. This bridgehas been satisfactory with the exce
. The Chinese railway system . :«! §o ■i ! 7 1 ^i ^ c u •a In 3 in so aa § so OB OQ ~1 ^ Reinforced Concrete Pile Scale V2=—. O/el B^i/rr Tvhe Or &»/. Jro/iW^oum^ /ran 4 ir/re tM»fe ^^1- 4<k- ffC-zi. XotmJ /ratt Fig. lA. To face page 183. REINFORCED CONCRETE ON THE CHINESE RAILWAYS 183 chippings and coarse river sand. An expansion joint oneinch wide was put in every 30 feet. The width of this isexcessive as from observations made in the followingwinter the total contraction amounted to only y^,. Thetotal variation in temperature was 76° Fah. This bridgehas been satisfactory with the exception of a crack whichdeveloped when the winter had set in, in one of the raisedpiers. This crack in the centre of the pier and about3 6 depth is thought to be due to contraction of theslabs as it occurred at the coldest time of the year. Theonly provision made for the sliding of the slabs on thepiers was to float the top surface of the pier and allow it toset before casting the slab. This is apparently insufficientand paper or grease should have been used to preventany bond. With regard to forms used in casting the
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Keywords: ., bookcentury1900, bookdecade1920, bookidcu3192402364, bookyear1922
