冬季百米高空远距泵送混凝土施工技术研究

Winter Meters Altitude Long-distance Pumping of Concrete Construction Technology Research

依托郑卢高速公路大铁沟特大桥混凝土施工,针对该桥120m高墩和160m大跨(大垂直泵送高度达137m)高空作业施工的特点,为避免高强度混凝土的超高压泵送因压力过高而产生泄漏,导致混凝土离析、堵管等诸多问题,从混凝土机械设备的选择、泵管的布设、混凝土配合比的优化、混凝土蒸汽养生等方面,对施工方案和施工工艺进行了优化,保证了施工安全和冬季混凝土的施工质量。

Relying Zhenglu concrete highway bridge large iron trough for the bridge 120 m and 160 m high pier Span（large vertical pumping height of up to 137 m）the characteristics of the construction of high-altitude operations, in order to avoid ultra-high-strength concrete high pressure pumping pressure due to high leakage, resulting in many problems in concrete segregation, blocked tubes, etc., from the selection of concrete machinery and equipment, pumps, pipe laying, concrete mix optimization aspect ratios, health and other concrete steam, the construction plan and construction process was optimized to ensure the construction quality of concrete construction safety and winter.