某油库倾斜地层上储罐地基变形研究

发布时间：2018-07-06 18:48

本文选题：倾斜地层 + 地层倾角　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：目前国内原油储备蓬勃发展,对原油消耗巨大。由于我国工业发达地区主要集中在东部沿海,但是东部沿海地区大多属于软土地基,故地基处理尤为重要,并且地基不均匀沉降是影响储罐正常使用甚至破坏的重要原因之一。储罐分布区的土层往往不是理想的平行地层,而是有些土层呈倾斜分布,这就容易造成储罐地基的不均匀性,从而可能会导致储罐发生不均匀沉降。本文结合实际工程以储罐地基为研究对象,利用有限差分软件FLAC3D对单储罐及储罐群地基沉降进行了动静荷载作用下的数值模拟。重点分析了在地层倾角、地层厚度、加固范围大小三种不同工况条件下单储罐以及储罐群的地基沉降规律并得出如下结论:1、地层倾角静力荷载作用下,单储罐发生向地层倾斜方向的整体倾斜沉降,各储罐之间的相互影响小于地层倾角的影响;动力荷载作用下,单储罐同样发生向地层倾斜方向的整体倾斜沉降,沉降程度要大于静力荷载作用,各储罐之间的相互影响要小于地层倾角的影响。2、地层厚度动、静荷载作用下,地层厚度对沉降的影响规律基本相同,由于各个储罐之间的相互影响较小,使得地层厚度的变化只对沉降值的大小产生了影响,并没有影响沉降曲线的发展趋势。3、加固范围静力荷载作用下,不同的加固半径对各个储罐的地基变形及地基沉降的发展趋势影响较小;动力荷载作用下,不同加固半径对储罐地基沉降影响较为显著。
[Abstract]:At present, the domestic crude oil reserves are booming, and the consumption of crude oil is huge. Because the industrial developed areas of our country mainly concentrate on the east coast, but the eastern coastal areas mostly belong to the soft soil foundation, so the foundation treatment is particularly important, and the uneven settlement of the foundation is one of the important reasons that affect the normal use and even damage of the storage tanks. The soil layer in the storage tank distribution area is often not ideal parallel stratum, but some soil layers are inclined distribution, which is easy to cause the storage tank foundation non-uniformity, which may lead to the storage tank uneven settlement. In this paper, taking the foundation of storage tank as the research object, the settlement of single storage tank and tank group foundation is simulated under dynamic and dynamic loads by using finite difference software FLAC3D. In this paper, the settlement law of the foundation of the storage tank and the storage tank group under three different working conditions, namely, the dip angle, the thickness of the stratum and the reinforcement range, is analyzed emphatically, and the following conclusion is drawn: 1, under the static load of the dip angle of the stratum, The single tank inclines towards the ground, and the interaction between the tanks is smaller than that of the dip angle, and under the dynamic load, the single tank also has the whole inclined settlement in the direction of the slope of the ground. The degree of settlement is greater than that of static load, and the interaction between storage tanks is smaller than that of dip angle. The influence of stratum thickness on settlement is basically the same under static load. Because the interaction between each tank is small, the change of stratum thickness only affects the settlement value, and does not affect the development trend of settlement curve. The influence of different reinforcement radius on the foundation deformation and the development trend of foundation settlement of each tank is small, and the influence of different reinforcement radius on the foundation settlement of storage tank is more obvious under dynamic load.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU433

【相似文献】