本科毕业论文 人工冻结发的施工技术研究 摘要：本文首先介绍了选题的目的与意义、国际及国内人工冻结法的研究与应用现状及冻胀融沉机理及试验研究。接下来介绍了人工冻土的分类和构造以，及地下水对冻土形成的影响。在冻土形成的过程中，物理力学性质也发生了很大的变化，于是在文中进一步研究了冻土的抗拉强度、抗压强度、抗剪强度。并阐述了人工冻结法的原理、设计以及冻结壁形成过程中温度场的变化。 在上述理论的基础上，进一步了解冻结法的设计和施工。于是本文主要从冻结方案选取、冻结孔的布置与施工以及土体开挖过程对人工冻结法进行阐述。最后结合某地铁隧道联络通道冻结法施工技术，对人工冻结发法在实际工程中的应用，进行了深一步的了解。 关键词：人工冻结法、冻土、冻结壁、冻结孔 Abstract: Frist, this paper introduces the topics of the purpose and significance of international and domestic Artificial Freezing Method Research and Application Status and frost thaw Mechanism and Experimental Study.Next comes the classification of artificial frozen soil and structure, as well as the impact of groundwater on the formation of the freezing soil.In the process of the formation of the freezing soil, the physical and mechanical properties great changes have taken place .So this paper study the tensile strength, compressive strength and shear strength of the freezing soil in the text for further.And describes the principles of artificial freezing method , design, and the changes of the freezing wall temperature field during the formation. It’s based on the above theory , learn more about the design and construction of freezing.Then select of the article elaborates artificial freezing method from the frozen solution , freezing hole layout and construction as well as during the excavation of soil.Finally, a subway tunnel connecting passage freezing construction technology, made of artificial freezing method in practical engineering applications, conducts a deep understanding of step. Keywords: artificial freezing , frozen , freeze wall , freezing hole 目录 第一章 绪论 .................................................................................................................................... 7 1.1选题意义 ............................................................................................................................ 7 1.2问题提出 ............................................................................................................................ 8 1.3国内外研究现状 .............................................................................................................. 11 1.4冻胀融沉机理及试验研究 .............................................................................................. 13 第二章 冻土描述及其性质 .......................................................................................................... 14 2.1冻土定义 .......................................................................................................................... 14 2.2冻土分类 .......................................................................................................................... 14 2.2.1按含冰特征 ........................................................................................................... 14 2.2.2按冻结状态持续时间分类 ................................................................................... 15 2.2.3按活动层与下卧层的类别及其关系分类 ........................................................... 15 2.2.4其他类型的冻土 ................................................................................................... 16 2.3冻土构造类别 .................................................................................................................. 17 2.4冻土形成过程 .................................................................................................................. 19 2.5地下水对冻土影响 .......................................................................................................... 21 2.5.1土粒与水的相互作用 ........................................................................................... 21 2.5.2水质与流速对岩土冻结影响 ............................................................................... 23 第三章 人工冻结法原理及其力学参数和特性 .......................................................................... 31 3.1人工冻结法原理 .............................................................................................................. 31 3.1.1制冷技术 ............................................................................................................... 31 3.1.2地下水对冻结的影响 ........................................................................................... 32 3.1.3温度场和冻结速度 ............................................................................................... 32 3.1.4冻胀和融沉效应 ................................................................................................... 33 3.2人工冻土的力学参数 ...................................................................................................... 34