土工鼓式离心机研发及在海底滑坡研究中的应用

为快速发展海洋土力学,大连理工大学于2009年引进了国内首台土工鼓式离心机GT450/1.4。通过与国际上同类产品的比较,详细介绍了鼓式离心机GT450/1.4的机械系统、控制系统、数据采集系统以及自主开发的配套设备PIV图像观测系统、黏土真空搅拌器、大型固结仪、撒样器的研发过程及工作原理。并以海底滑坡为研究对象,采用现场取样土,对深海滑坡进行探索性研究。离心模型试验结果表明:鼓式离心机GT450/1.4性能优良,功能全面,在机械设备规模、数据采集精度、控制系统自动化程度及作动器加载模式方面均优于国外同类产品,同时便于升级改造为“土工鼓-臂联合式离心机”。土工鼓式离心机对于研究海底滑坡等相关海洋工程领域课题具有一定的优越性。

Research and Development of Geotechnical Drum Centrifugeand Its Application to Submarine Landslides

The first geotechnical drum centrifuge GT450/1.4 in China was introduced by Dalian University of Technology in 2009 with the aim of building an integrated testing platform to face the rapid development of marine soil mechanics. The details of mechanical system, control system, data acquisition system and other corollary equipment including PIV system, vacuum mixer for clay, large-scale consolidation apparatus and soil placement device, are presented through a comparison with the corresponding products in the world. Furthermore, submarine landslide is simulated by centrifugal tests with remoulded soil obtained in-situ. The results of centrifugal test show that drum centrifuge GT450/1.4 is of high performance and comprehensive capacity, and is better than other similar products in terms of mechanical system scale, data acquisition accuracy, automation of control system and load mode of actuator. Meanwhile, drum centrifuge GT450/1.4 is easy to be developed to be a modular geotechnical drum-beam centrifuge. Geotechnical drum centrifuge has advantages in the research of ocean engineering structures such as submarine landslide.