基于蠕变特性的吹填砂性土长期沉降计算

Calculation of long-term settlement for hydraulic-fill sandy soil based on creep characteristics

中东地区的港口码头一般通过吹填砂土造陆。受限于施工工艺,细粒易在吹填过程中形成淤积,从而导致沉降过大。当前的设计计算方法对于高细粒含量砂性土工后沉降的计算均未考虑细粒含量、矿物类型等因素,难以评估细粒含量对工后沉降的影响。为解决该工程问题,提出一种基于蠕变特性的吹填砂性土长期沉降计算方法,并与传统及基于原位试验的计算方法进行对比分析,验证了计算方法的可行性。

Ports and terminals in the Middle East are generally built by hydraulic fill. Due to the limitation of construction technology, fine grains are easy to form siltation in hydraulic reclamation, which results in excessive settlement. The current design calculation methods do not consider the fine-grain content, mineral type, and other factors in the calculation of post-construction settlement of sandy soil with a high content of fine grains. Thus, it is difficult to evaluate the influence of the fine-grain content on post-construction settlement. To solve this engineering problem, this study proposes a calculation method for the long-term settlement of hydraulic-fill sandy soil based on creep characteristics and compares it with traditional and in-situ test methods to verify the feasibility of the proposed method.