FIELD: construction.
SUBSTANCE: invention relates to military bridge engineering. Pontoons installed in transverse direction to axis of bridge are combined into continuous structure along whole length of river part by means of connecting frame blocks installed in several rows. Special connecting frame structure receives and transmits, mainly, longitudinal loads acting along axis of axle from weight of structures and temporary load from rolling stock. Frame receives and transfers loads from pontoons to each other, both in level of deck, and in bottom level. Loads in the level of the deck receive and transmit the upper frame belt. Bending moment occurring in frame from longitudinal load in bottom level of pontoons, which are not connected by straight structural elements to prevent constraint of current flow, is transferred by vertical support shaped elements from upper belt to lugs in level of pontoons bottom. Shaped elements (two - on the frame) represent a quadrangular steel plate with parallel horizontal upper and lower sides, a vertical side adjoining the pontoon board, and an inclined side rising from the lower lug to the upper frame belt. Frame unit consists of two frames interconnected by longitudinal links.
EFFECT: invention can be used in development of structures of inventory surfaced railway bridges.
1 cl, 3 dwg
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