滨海软土地基处理技术及沉降分析

【作者】 郑焕然；

【导师】 赵明华； 郭时安；

【作者基本信息】 湖南大学 ， 建筑与土木工程， 2003， 硕士

【摘要】 随着沿海城市经济的快速发展，对高等级道路的建设需求也不断地扩大。但由于沿海道路地质形成的特殊性，沿线路基下经常存在深厚的软土层，这极大地影响了道路的长期稳定和安全使用，使得滨海道路建设的难度加大。因此，滨海软土地基处理技术及沉降问题的研究对沿海道路的建设十分重要。 本文首先阐述了软土地基尤其是滨海软土地基的特点，对目前常用的软土地基处理方法以及新技术进行研究，从中比较、选择适合滨海软土地基处理的方法，并发展和提出了滨海软土地基处理的新技术，经过在深圳滨海大道的实际应用，得到了令人满意的结果，并对滨海软土地基常用的处理方法及其施工工艺进行详细地介绍；在软土地基处理中，如何由早期实测资料更准确地推求最终沉降量一直是一个困扰人们的难题，也是高等级道路建设中急需解决的问题，本文深入地研究滨海软土地基的应力—应变关系、路基沉降的一般规律以及最终沉降量的预估方法，比选出了滨海软土路基最终沉降量的预估方法。最后本文提出，在滨海软土路基施工中，对软土地基的水平、竖向变形以及土中孔隙水压力必须进行监控以保证软土路基施工的质量和预防重大事故的发生，并强调以现场原位试验来确定软土工程力学性质，将更符合工程实际。 通过深圳滨海大道的软土工程实践，本文的研究成果得到了进一步论证。更多还原

【Abstract】 With the great development of coastal economy, it is necessary to build more high grade highway. But because of the specialty of coastal geology, there often exists the deep soft soil layer under the roadbed along the road, which affect the highway’s long-term stability and safety usage. Study on the foundation treatment technique and settlement problem of coastal soft soil is essential.Firstly, The characteristics of soft soil especially of the seashore’s was recommended and the ordinary methods of foundation treatment and new techniques was carefully researched, so the suitable methods of coastal soft soil’ foundation treatment was chose, and the new technique of coastal soft soil’s foundation treatment was developed and advanced, which applied to Binhai road in Shenzhen, the result is satisfied, furthermore we introduce in detail them and their construction method; How to accurately predict the ultimate settlement by use of the inchoate data always is a puzzled problem in foundation treatment, and also a key problem in high grade road construction. Secondly the stress-strain curve of the coastal soft soil, general regulation of settlement of which and estimate method of ultimate settlement was studied in this paper, then the best method of prediction the ultimate settlement of coastal soft soil foundation was chose. Finally, we suggest we should observe the horizontal and vertical deformation and water press in soil in construction, in order to avoid the huge accident and ensure the quality of construction.Through the practice of Binhai Road in Shenzhen, the studies result was further confirmed.更多还原