土工基础

›› 2016, Vol. 30 ›› Issue (4): 507-509.

• 工程实录 • 上一篇    下一篇

离心机模型试验中制备砂样的砂雨沉积法

曹明明，肖昭然   

  1. （河南工业大学，郑州 450001）
  • 收稿日期:2015-07-23 出版日期:2016-08-20 发布日期:2016-08-26
  • 作者简介:曹明明（1987-），男，在读硕士研究生，研究方向为岩土工程。

Assessment of a Traveling Pluviation Apparatus for the Preparation of Sand Samples

CAO Mingming, XIAO Zhaoran   

  1. (Henan University of Technology, Zhengzhou 450000)
  • Received:2015-07-23 Online:2016-08-20 Published:2016-08-26

摘要： 在离心机试验中极其重要的一个步骤就是土样的制备，如何制备不同密实度土样是是模型试验中的关键问题。研制了一个砂雨法装置，可用于在离心机中制备目标砂样。通过一系列的标定试验研究得出了落砂高度、管径与砂土的相对密实度之间的关系。试验结果表面通过结合不同的管径和落砂高度，可利用落雨法装置制得不同级别的松砂或密砂。经过标定试验验证，该装置稳定可靠，制备的土样满足室内模型试验要求。

关键词: 砂雨法, 砂土, 密实度, 模型试验

Abstract: The sample preparation is one of the most important procedures in the centrifuge tests. The key issue is to prepare various samples with designated densities. This paper presents a new sample preparation method that can prepare sand samples with various densities by using the traveling pluviation apparatus (TPA) for the centrifuge tests. Throughout the calibration tests, the target density relationships among the dropping height of sand, diameter of the pipe are obtained. The calibration tests also indicate that this apparatus can provide various densities of the sand samples by adjusting the sand dropping height, and the diameter of sand pipe.

Key words: Traveling Pluviation, Sand Samples, Density, Model Tests