桶式结构气浮和下沉模型试验研究.PDF

36 卷 5 期 国港湾建设 Vol. 36 No.5 2016 年5 月 China Harbour Engineering May. 2016 桶式结构气浮及下沉模型试验研究 1 2 夏俊桥 ，李武 （1. 中交 三航务工程局有限公司江苏分公司，江苏 连云港 222042； 2. 中交 三航务工程勘察设计院有限公司，上海 200032 ） 要：针对桶式结构在淤泥质海岸软土地基上安装中的气浮和下沉关键技术，采用平面尺度 1 颐6 ，深度 1 颐2 的钢 制模型桶进行现场试验，通过海上气浮拖运模型桶，观察桶式结构气浮拖运时的吃水深度、摆动幅度及干舷高度， 归纳气浮拖运工艺和关键控制参数；通过排气排水下沉，观察桶式结构下沉速度与排气排水量的关系、下沉阻力及 各个仓格对桶体纠偏的效果，得出桶式结构下沉工艺和纠偏工艺的控制指标，确定桶式结构施工过程的关键控制参 数，为桶式结构施工奠定技术基础。 关键词：桶式结构；气浮；负压下沉 中图分类号：U656.2 文献标志码：A 文章编号：2095-7874（2016）05-0035-04 doi ：10.7640/zggwj s201605009 Model study and research on flotation and sinking of barrel structures XIA Jun-qiao1, LI Wu2 （1. Jiangsu Branch of CCCC Shanghai Harbour Engineering Company, Ltd., Lianyungang, Jiangsu 222042, China; 2. CCCC Third Harbor Consultants Co., Ltd., Shanghai 200032, China ） Abstract For the key technologies for flotation and sinking of barrel structures to improve the soft ground on a muddy coast, model tests were carried out on site with a steel barrel model with its plan scale of 1 : 6 and its depth scale of 1 : 2. By floating and hauling the model barrel, the draft, swaying and freeboard of the barrel were observed and the technological process and the key control parameters for floating haulage of the barrel were summarize. By draining and lowering down the model barrel, the relationship of sinking speed of the barrel to the discharge of air and water from the barrel, sinking resistance and the effect of the cells upon the correction of the inclination of the barrel were observed, thus obtaining the control targets f