单桶负压下沉过程中土体与桶形基础的相互作用  

Interaction between soil mass and bucket foundation in suction sinking process of single bucket

作　　者：王庚荪[1] 孔令伟[1] 杨家岭[1] 孙东昌[2] 王泉[2] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学重点实验室,湖北武汉430071 [2]胜利油田管理局钻井工艺研究院海洋工程技术研究所,山东东营257017

出　　处：《岩土力学》2003年第6期877-881,共5页Rock and Soil Mechanics

基　　金：国家863计划资助项目(编号:820-10-01)。

摘　　要：从理论上分析了单桶负压下沉过程中土体与桶形基础的相互作用。建立了桶在下沉过程中力传递的微分方程式,求得了桶在自重下沉时所能达到的最大深度与桶体自重、所受垂直载荷、桶体几何要素、土体的力学参数以及桶-土之间的摩擦强度之间的关系。考虑了负压下沉过程中渗流的影响,确立了桶内土柱顶部所需压力与下沉深度之间的对应关系。The interaction between the soil mass and bucket foundation during the sinking process of a single bucket driven by negative pressure is analyzed. The differential equation for the stress transfer in the sinking process of a bucket is established. The relation of the greatest sinking depth of the bucket by itself weight with the weight of bucket, the vertical load, the geometric parameters of the bucket, and the mechanical properties as well as the frictional strength between soil and bucket is obtained. The effect of percolation during the sinking process is also considered, and the sinking depth and the negative pressure required are determined.

关 键 词：桶形基础 负压下沉 土体-基础相互作用 土弹簧模型 海洋工程平台 土力学 

分 类 号：P751[交通运输工程—港口、海岸及近海工程] TU435[天文地球—海洋科学]