论文部分内容阅读
本文简要的叙述了对上海黄浦江岸边淤泥质粘土的研究成果。试验的目的是为了明确该土层的天然固结状态,天然强度及加荷、卸荷状态下的强度变化规律。全部室内试验计包括:固结试验及三轴固结不排水压缩试验并测孔隙压力。试验中采用了固结之前施加反压力及在试样两端涂硅脂等项技术。按照对粘性土的固结、抗剪强度基本特性的认识,从土的准先期固结压力,孔隙压力系数A、应力途径,应力圆包线、应力—应变曲线的规格化等方面分析试验成果,认为上海黄浦江岸边的淤泥质粘土处于轻度超压密状态。最后,提出了各种状态下的强度参数。
This article briefly describes the research results of muddy clay on the bank of Shanghai Huangpu River. The purpose of the test is to clarify the natural consolidation state of the soil layer, the natural strength, and the strength change law under the loading and unloading conditions. All laboratory tests include consolidation tests and triaxial consolidated undrained compression tests and measurement of pore pressure. In the test, techniques such as applying back pressure prior to consolidation and applying grease on both ends of the specimen were used. According to the understanding of the basic characteristics of the consolidation and shear strength of clayey soil, the experimental results were analyzed from the aspects of quasi-early consolidation pressure, pore pressure coefficient A, stress pathway, stress envelope, and stress-strain curve normalization. It is believed that the muddy clay on the banks of the Huangpu River in Shanghai is in a slightly over-densified state. Finally, the strength parameters in various states are proposed.