静冰压力对铰链式护坡系统作用的低温模型试验
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摘要
通过低温模型试验模拟了冰盖的形成过程,测试了静冰压力、铰接块位移、冰盖厚度、温度等,建立了这些物理量与时间的关系。根据静冰压力的发展过程、变化原因评价了试验与自然环境的相似性。根据铰链式护坡系统在静冰压力作用下沿坡面位移变形和冰盖融化后的残余变形,评价了该护坡系统的稳定性以及该护坡系统作为柔性护岸结构适应变形的能力,分析了静冰压力、铰接块位移的发生、发展、消失过程和变化原因。试验结果表明:静冰压力作用下铰链式护坡系统沿坡面位移变形很小,冰盖融化后该护坡系统的残余变形也很小;铰链式护坡系统在静冰压力发生、发展和消失的过程中,能够适应岸基变形而不被破坏。
The formation of ice cover was simulated with a low-temperature model test.The static ice pressure,the displacement of the articulating concrete block(ACB),the thickness of ice cover,and the temperature were tested,and the relationships between these physical properties and time were established.The comparability test and nature were evaluated based on development of static ice pressure and its reason for changing.The stability adaptability to deformation of the slope protection system was evaluated with the displacement deformation along the slope of the articulating slope protection system under the static ice pressure and the residual deformation of ice cover after thawing.The course of occurrence,development,disappearance and reason for change of the static ice pressure and the articulating concrete block displacement were analyzed.The results show that the displacement deformation along the slope of the articulating slope protection system under static ice pressure is very small.The articulating slope protection system can ensure that the deformation of the shore-base doesn't lead to failure.
The formation of ice cover was simulated with a low-temperature model test.The static ice pressure,the displacement of the articulating concrete block(ACB),the thickness of ice cover,and the temperature were tested,and the relationships between these physical properties and time were established.The comparability test and nature were evaluated based on development of static ice pressure and its reason for changing.The stability adaptability to deformation of the slope protection system was evaluated with the displacement deformation along the slope of the articulating slope protection system under the static ice pressure and the residual deformation of ice cover after thawing.The course of occurrence,development,disappearance and reason for change of the static ice pressure and the articulating concrete block displacement were analyzed.The results show that the displacement deformation along the slope of the articulating slope protection system under static ice pressure is very small.The articulating slope protection system can ensure that the deformation of the shore-base doesn't lead to failure.
引文
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[2]丁德文,罗学波.冻土热工模型的理论基础[J].科学通报,1979,8(8):360-364.
[3]黄焱,史庆增,宋安.冰力模型实验中的模型律[J].冰川冻土,2003,25(S2):352-355.
[4]耿余春,丁树常,罗文荃,等.松花江冰厚及开江日期分析[J].水文,1996(1):52-55.
[5]卢鹏,李志军.现行规范中计算桩柱冰荷载的比较[J].冰川冻土,2003,25(S2):256-259.
[6]蔡之瑞,孙泊涛,郭世容,等.冰荷载的实验研究和计算方法[J].地震工程与工程震动,1997,17(4):49-55.
[7]陆钦年,段忠东,欧进平,等.河冰对桥墩作用的冰荷载计算方法(Ⅱ)[J].自然灾害学报,2002,11(4):112-118.
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