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通过对冻、融土强度性能的对比分析,发现冻土强度远大于融土,导致冻土开挖困难,是困扰寒区工程作业的一项技术难题.作者首先介绍了几种开挖冻土的方法,并对不同开挖法的实用性和可行性做了阐述,指出机械法开挖破碎冻土是十分重要和有效的措施.冻土开挖破碎的难易程度取决于冻土动力学性质及其与开挖机械的作用关系,本文对冻土动力学方面的研究做了简要概述,旨在指出影响冻土动力学性质的主要因素及其破坏损伤特征,为冻土开挖方式优化、改进开挖机械性能提供参考.最后结合以往的冻土切削和冲击试验,对进一步开展冻土开挖和开挖机械优化研究提出了几点建议,希望对改良寒区工程施工技术、提高作业效率起到指引作用.
Through the comparative analysis of the strength of frozen soil and thawing soil, it is found that the strength of frozen soil is far greater than that of thawing soil, resulting in the difficulty of excavation of frozen soil, which is a technical problem that plagues the engineering work in the cold area.Firstly, , And expounds the practicability and feasibility of different excavation methods and points out that the mechanical method of excavating and crushing frozen soil is a very important and effective measure.The difficulty of excavation and crushing of frozen soil depends on the dynamics of frozen soil Nature and its relationship with the role of excavation machinery, this paper briefly summarizes the research on the dynamics of frozen soil, aims to point out the main factors affecting the dynamic properties of frozen soil and its damage characteristics of damage, optimization of frozen soil excavation , To improve the performance of excavation machinery provide a reference.Finally, combined with the previous frozen soil cutting and impact test, to further carry out research on optimization of the excavation and excavation of frozen soil put forward several suggestions, hoping to improve the cold area construction technology, improve operations Efficiency plays a guiding role.