长距离岩石顶管泥浆配比优化及减摩效果分析
DOI:
作者:
作者单位:

贵州大学土木工程学院

作者简介:

通讯作者:

中图分类号:

U454

基金项目:

国家自然科学基金青年(52208391);贵州大学博士人才基金(2021-78);


Optimization of mud ratio and friction reduction effect of long-distance rock pipe jacking analysis
Author:
Affiliation:

School of Civil Engineering, Guizhou University

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    在超长距离岩石微盾构顶管中,管壁摩阻是决定顶推力大小和中间顶升站布置的关键因素,而选择好的膨润土泥浆是控制管壁摩阻的关键因素。为能充分发挥聚合物膨润土泥浆在顶管施工过程中润滑和支撑的作用,本文以重庆观景口水利枢纽工程为依托,通过正交试验和室内直剪试验方法对不同类型的膨润土泥浆的基础配比优化,根据浆液性能参数,以及减摩机理得出最优类型泥浆及其配比。结果表明:钠基膨润土泥浆为最优泥浆类型,其配比为膨润土与水的质量比为14%,瓜儿胶0.20%,纯碱0.4%,CMC为0.4%,PAM为0.10%,其减摩效果明显,能够使混凝土与灰岩之间的摩擦系数降低百分之35%,使得岩石顶管顶进过程中,管岩间的摩阻力大大降低。

    Abstract:

    In ultra-long-distance rock micro-shield pipe jacking, pipe wall friction is a key factor in determining the size of the jacking force and the arrangement of the intermediate jacking station, and the selection of a good bentonite mud is a key factor in controlling the pipe wall friction. In order to give full play to the polymer bentonite mud in the pipe jacking construction process of lubrication and support, this paper to Chongqing Guanjingkou Water Conservancy Hub project as a basis, through orthogonal tests and indoor straight shear test method on the basis of different types of bentonite mud ratio optimization, based on the performance parameters of the slurry, as well as the friction reduction mechanism to derive the optimal type of mud and its ratio. The results show that: sodium bentonite mud is the optimal type of mud, the ratio of bentonite to water is 14%, guar gum is 0.20%, soda ash is 0.4%, CMC is 0.4%, PAM is 0.10%, and its friction reduction effect is obvious, it can make the friction coefficient between concrete and gray rock reduced by 35%, which makes the friction between the pipe and the rock greatly reduced in the process of pipe jacking in the rock.

    参考文献
    相似文献
    引证文献
引用本文

王旭,李超. 长距离岩石顶管泥浆配比优化及减摩效果分析[J]. 科学技术与工程, , ():

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2023-11-23
  • 最后修改日期:2024-06-12
  • 录用日期:2024-06-24
  • 在线发布日期:
  • 出版日期:
×
亟待确认版面费归属稿件,敬请作者关注
《科学技术与工程》入选维普《中文科技期刊数据库》自然科学类期刊月度下载排行榜TOP10