勘察技术在膨胀土填土场地强夯施工中的应用

摘要

利用岩土工程勘察技术解决岩土施工中的技术难题看似常规思路,但在工程施工人员专业单一、经验缺乏的情况下却无法有效利用.通过对云南龙陵某厂勘察报告再分析,结合对现场地基土吸水膨胀特点的观察,进一步搞清了该场地需处理的大厚度填土的组成及膨胀土特性,提出了“边揭边夯、及时覆盖、对特殊情况特殊处理”的强夯施工思路,有效解决了雨季泥泞的膨胀土地区无法施工、大面积大厚度填土无法处理的问题,缩短了工期,降低了工程造价.%Using geotechnical engineering methods to resolve technical difficulties in construction processes may appears to be a common approach,geotechnical construction workers may found it challenging to apply such method to work due to their diverse backgrounds and lacking of experiences.Based on the analyses of the Geotechnical Investigation Report of a Plant in Yunnan Longling and on-site observations of the distinctive foundation soil expansion due to water absorption,this paper further discussed the component of the thick fill to be disposed and the characteristics of the expansive soil at the location.This paper also proposed a dynamic compaction approach of "compacting while removing,timely filling,case by case treatment" which can effectively resolve the construction difficulties caused by expansive soil during rainy season and the problem of unable to dispose large scale thick soil.The proposed approach will eventually shorten the construction period as well as reduce the cost which provides theoretical value and practical significance to similar projects.