沉入式大圆筒结构码头工作机理离心模型试验研究  

Centrifuge modeling of quay walls composed of large-diameter cylinders embedded below mud line

作　　者：徐光明[1] 章为民[1] 赖忠中[1] 

机构地区：[1]南京水利科学研究院土工研究所,江苏南京210024

出　　处：《海洋工程》2001年第1期38-44,共7页The Ocean Engineering

基　　金：国家重点科技项目 (攻关 )计划资助项目! (96 -4 15 -0 3-0 1-0 2 -0 1)

摘　　要：沉入式大圆筒结构码头 ,由于筒体下部有一定长度嵌入港池泥面以下的地基土层中 ,因此 ,其工作机理不仅不同于其它挡土岸壁式码头 ,而且也有别于基床式大圆筒结构码头。本文介绍了用土工物理离心试验对这一结构形式码头工作机理所作的研究 ,就沉入式大圆筒的深高比、径高比和筒壁摩擦作用对工作性状影响规律进行了初步研究 ,另外还尝试测定了大圆筒侧壁土压力分布规律 。Quay walls composed of large-diameter cylinders embedded below the mud line are much different in working mechanism from those placed on rubble mattress because of the depth of embedment. In this paper, a preliminary study on the stability and displacement behavior of this type of quay wall by means of centrifuge modeling is presented.The effects of the ratio of embedment depth to height, the ratio of diameter to height and wall friction on the performance of the quay wall are intensively investigated.In the centrifuge tests, updated instruments are installed in the model to measure the horizontal displacement and settlement of the quay wall. Obvious reduction in forward movement of the wall can be achieved by adding the depth of embedment and enlarging the diameter of cylinders.However,more significant effect can be obtained by taking the former measure than the latter,especially when the ratio of embedment depth to height is increased out of nothing.The magnitude and distribution of earth-pressure on the wall are also measured and compared with those calculated according to Rankings theory.

关 键 词：沉入式 圆筒结构 深高比 工作机理 径高比 筒壁摩擦 土压力 离心试验 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]