新型防沉板基础的地基承载力研究

发布时间：2018-01-01 05:35

本文关键词：新型防沉板基础的地基承载力研究　出处：《岩土力学》2016年11期 　论文类型：期刊论文

【摘要】：防沉板是水下生产系统中井口、管汇节点、脐带缆等的支撑结构,服役期间需承受V-H荷载空间的强耦合非线性荷载。提出了新型倾斜式裙板防沉板基础型式,倾斜式裙板不仅可以减少海流冲刷对基础下部土体的掏空冲蚀,还可通过调整裙板倾斜角度?适应不同工程对承载力的要求,结合工程设计实例研究了新型防沉板的地基承载性能。结果表明,该新型防沉板基础单向极限承载力随土体强度不均匀性指标?的增加呈线性增长,基础与土体接触面属性对水平向承载力的影响远大于对竖向承载力的影响;防沉板基础V-H荷载空间归一化包络线对土体强度不均匀性指标?在0~10范围内具有普适性,在归一化竖向荷载介于0.5~0.8时Hanson公式高估了防沉板基础的承载力。
[Abstract]:Anti-sinking board is the supporting structure of wellhead, pipe joint, cord cable and so on in underwater production system. A new type of inclined skirt plate foundation is proposed, which can not only reduce the tunneling erosion caused by the current scour to the soil under the foundation. Can you also adjust the tilting angle of the skirt? According to the requirements of different projects for bearing capacity, combined with engineering design examples, the foundation bearing capacity of the new anti-sinking plate is studied. The results show that the unidirectional ultimate bearing capacity of the new anti-sinking plate foundation varies with the uneven strength of soil. The effect of the properties of the interface between foundation and soil on the horizontal bearing capacity is much greater than that on the vertical bearing capacity. Index of nonuniformity of soil strength by Normalized enveloping Line of V-H load on Anti-sinking Plate Foundation? The Hanson formula overestimates the bearing capacity of anti-settlement plate foundation when the normalized vertical load is between 0.5 and 0.8.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室;天津大学港口岩土工程技术交通行业重点实验室;
【基金】：国家重点基础研究发展计划(973计划)(No.2014CB046800) 国家自然科学基金优秀青年基金(No.51322904) 高等学校博士学科点专项科研基金资助课题(No.20130032110074)~~
【分类号】：TU470
【正文快照】： 1引言我国海洋石油资源相当丰富,约占我国石油总资源量的三分之一。但由于海洋石油开采起步晚,技术相对落后,对南海海域的油气资源开发度远远不足。目前我国海洋油气资源的开发,正处于由浅海向深海过渡的关键阶段。深海油气开发的海洋环境和荷载特征明显区别于浅海模式,使用

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