辽东湾北部三道沟平整冰单轴抗压强度特征

CHARACTERISTICS OF UNIAXIAL COMPRESSIVE STRENGTH OF LEVEL ICE OFF SHANDAOGOU IN NORTHERN LIAODONG BAY

对辽东湾三道沟平整体做了系列抗压强度试验,获得了新的抗压强度经验公式并与渤海其它冰区的试验结果做了比较。分析说明,三道沟平整体的多层次晶体结构使抗压强度趋向各向同性,即σ_(cv)≈σ_c。历次试验建立的σ_c-V_b关系的经验公式具有局限性和不可比性。当冰的晶体结构由柱状晶试样变更成多层次多种晶试样时,σ_c增大,σ_(cv)则减小,最后趋向同量级。各种冰之间的σ_(cv)-σ_c关系在不同的温度下均可用线性函数描述。

A series of experiments about uniaxial compressive strength of level ice off Shandaogou in the northern Liaodong Bay were made.New empirical formulae on tie compressive strength were obta-ined and compared with those for other areas of the Bohai Sea.The analyses in this paper show that the multilayer crystal structure makes the level ice compressive properties isotropical.The relations between **********oc and Vb formed in all previous experiments are limited and uncomparitive.When the crystal structure varies from columnar to multi-layer,************oc increases and *********ocV decreasea and they tend to the same order finally.Their relations at various temperatures can be described as linear functions.