临江高承压水砂层超深地连墙泥浆参数试验研究
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

TU91

基金项目:

51708424


Experimental study on mud parameters of ultra-deep ground-linked wall in Linjiang high-pressure water-sand layer
Author:
Affiliation:

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:

    南京地铁4号线二期工程滨江站~龙江区间中段江心洲风井工程地表存在淤泥质黏土和较厚高层压水粉砂层,下部覆盖高强度砂砾岩层,地连墙施工时若泥浆参数选择不当则难以起到护壁效果进而发生塌孔或缩孔情况。提高泥浆重度是增大槽壁稳定性安全系数的最直接方式,但同时也会大大增加工程成本。为探明淤泥覆盖下高承压水砂层条件下地连墙成槽作业时最优的泥浆参数,分析并评价该地质条件下的成槽质量,本文采用泥浆护壁的抛物柱法三维模型队泥浆参数进行计算,并通过试成槽试验和超声波检测对计算结果进行验证,最终选择出合适的泥浆配比。研究结果证明泥浆粘度为33s,泥浆比重为1.07g·cm3时可以保证成槽稳定性系数为1.5,结果可为类似工程提供参考。

    Abstract:

    In the middle section of the Jiangxinzhou wind shaft project within the Nanjing Metro Line 4 Phase II project, spanning from Binjiang Station to the Longjiang interval, a geological composition is encountered consisting of silty clay and a substantial layer of high-pressure water-saturated sands. Below this, there exists a high-strength gravel layer. In the context of ground connection wall construction, failure to select appropriate mud parameters may result in a compromised wall protection effect, leading to potential wall collapse or hole shrinkage. The most direct approach to enhance wall stability is by increasing the mud weight, albeit at a significant escalation in project cost. To ascertain the optimal mud parameters for trenching operations beneath the high-pressure water-saturated sand layer overlain by silt and to conduct an analysis and evaluation of trenching quality under these geological conditions, a parabolic column method three-dimensional model of the mud wall protection system is employed in this study. This model facilitates the calculation of mud parameters, with the subsequent validation of results through trial trenching tests and ultrasonic testing. Ultimately, a suitable mud ratio is chosen based on the research findings. The research outcomes substantiate that a mud viscosity of 60 s and a specific gravity of 1.07 g·cm3 can ensure a stability factor of 1.5. These findings provide valuable reference points for similar projects and hold potential significance for future research in this domain.

    参考文献
    相似文献
    引证文献
引用本文

金明,张旭晖,陕耀,等. 临江高承压水砂层超深地连墙泥浆参数试验研究[J]. 科学技术与工程, 2024, 24(15): 6405-6414.
JIN Ming, ZHANG Xu Hui, SHAN Yao, et al. Experimental study on mud parameters of ultra-deep ground-linked wall in Linjiang high-pressure water-sand layer[J]. Science Technology and Engineering,2024,24(15):6405-6414.

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:2023-05-05
  • 最后修改日期:2024-05-21
  • 录用日期:2023-10-24
  • 在线发布日期: 2024-06-04
  • 出版日期:
×
亟待确认版面费归属稿件,敬请作者关注