...
首页> 外文期刊>Journal of Mechanical Science and Technology >Experimental investigation on viscoplastic parameters of conditioned sands in earth pressure balance shield tunneling
【24h】

Experimental investigation on viscoplastic parameters of conditioned sands in earth pressure balance shield tunneling

机译:土压平衡盾构隧道条件砂粘塑性参数试验研究。

获取原文
获取原文并翻译 | 示例
           

摘要

A device was developed to determine the viscoplastic parameters of conditioned soil, which works on the principle of torsional shear applied to a standard vane with controlled strain rate. Rheological measurements were taken for three sand samples with the same bentonite slurry injection ratio (14.3%), but with different foam injection ratios (19%, 23%, and 27%), by changing the gasbag pressure levels (i.e., 0, 100, 200, 300, and 400 kPa) and vane speeds (i.e., 1/3.4, 1/4.1, 1/5, 1/6.4, 1/9, 1/15, and 1/30 RPM) to determine the effects of confining pressure and foam injection ratio on the viscoplastic parameters. The results show that the values of viscosity coefficient and yield stress for conditioned sands are in the range of 9.1-53.5 kPa·s and 1.5-10.2·kPa, respectively. The viscoplastic parameters increase with the increase of the confining pressure, and decrease with the increase of the foam injection ratio for all tested samples.
机译:开发了一种用于确定条件土壤粘塑性参数的装置,该装置基于将扭剪原理应用于具有受控应变率的标准叶片的原理。通过更改气囊压力水平(即0、100),对三个具有相同膨润土浆料注入比率(14.3%)但泡沫注入比率不同(19%,23%和27%)的砂样进行流变测量。 ,200、300和400 kPa)和叶片速度(即1 / 3.4、1 / 4.1、1 / 5、1 / 6.4、1 / 9、1 / 15和1/30 RPM)来确定围压和泡沫注入比例对粘塑性参数的影响。结果表明,调理砂的黏度系数和屈服应力分别在9.1-53.5 kPa·s和1.5-10.2·kPa的范围内。对于所有测试样品,粘塑性参数随围压的增加而增加,随泡沫注入比的增加而减小。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号