[1]汝俊起.泥浆含砂量对泥水盾构泥浆成膜性能影响的试验研究*[J].中国安全生产科学技术,2022,18(2):191-197.[doi:10.11731/j.issn.1673-193x.2022.02.029]
RU Junqi.Experimental study on influence of sand content of slurry on filter-cake formation performance of slurry shield[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(2):191-197.[doi:10.11731/j.issn.1673-193x.2022.02.029]
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泥浆含砂量对泥水盾构泥浆成膜性能影响的试验研究*
RU Junqi.Experimental study on influence of sand content of slurry on filter-cake formation performance of slurry shield[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(2):191-197.[doi:10.11731/j.issn.1673-193x.2022.02.029]
《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]
- 卷:
- 18
- 期数:
- 2022年2期
- 页码:
- 191-197
- 栏目:
- 职业安全卫生管理与技术
- 出版日期:
- 2022-02-28
文章信息/Info
- Title:
- Experimental study on influence of sand content of slurry on filter-cake formation performance of slurry shield
- 文章编号:
- 1673-193X(2022)-02-0191-07
- Keywords:
- sand content; slurry balanced shield; slurry proportion; filter-cake; sandy pebble stratum
- 分类号:
- X947U455.43
- 文献标志码:
- A
- 摘要:
- 为在高渗透砂卵石地层泥水盾构施工中确保开挖面稳定、保证施工安全，泥浆顺利成膜至关重要。依托京张高铁清华园隧道工程，采用自行设计的泥浆渗透试验装置，配制6种不同含砂量的泥浆，在与实际地层渗透系数相似的试验地层中进行渗透试验。对泥浆在渗透过程中的成膜类型、成膜质量、渗透深度、滤失量、闭气性能等相关指标进行分析，得到适用于高渗透性砂卵石地层的泥浆配比。结果表明：未加砂的泥浆在试验地层中难以顺利形成泥膜，泥膜渗透滤失量随含砂量的增加表现为先增后减，轻质砂的加入明显改善了泥浆的渗透成膜能力及闭气性。根据试验结果对依托工程泥浆配比进行优化，采用粒径在0.075~0.25 mm的细砂将泥浆含砂量调至9.6%，经实际施工验证，其成膜效果良好。
- Abstract:
- In order to ensure the stability of excavation face and the safety of construction in the slurry shield construction of high permeability sandy pebble stratum,the smooth filter-cake formation of slurry is very important.Based on the Tsinghuayuan Tunnel project of Beijing-Zhangjiakou High-Speed Railway,a self-designed slurry permeation test device was adopted.Six kinds of slurry with different sand contents were prepared,and the permeability tests were carried out in the testing stratum with similar permeability coefficient to the actual stratum.The relevant indexes such as the filter-cake formation type,filter-cake formation quality,permeation depth,filtration rate and airtightness property of the slurry in the permeation process were analyzed,and the slurry proportion suitable for high permeability sandy pebble stratum was obtained.The results showed that the slurry without sand was difficult to form the slurry filter-cake smoothly in the testing stratum.The filtration rate of slurry filter-cake increased first and then decreased with the sand content.The addition of light sand significantly improved the permeability filter-cake formation ability and airtightness property of the slurry.According to the test results,the slurry proportion of the relying project was optimized,and the sand content of slurry was adjusted to 9.6% by using the fine sand with the particle size of 0.075~0.25 mm.The actual construction verified that the filter-cake formation effect was good.
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备注/Memo
- 备注/Memo:
-
收稿日期： 2021-02-28；网络首发日期： 2022-01-24
* 基金项目： 中国铁路总公司科技研究开发计划课题项目（2017G007-B）；中铁十四局集团大盾构公司技术开发项目（ZT14-大盾构公司-JZTL-QT-2018-0016）
作者简介： 汝俊起，本科，高级工程师，主要研究方向为隧道施工技术。
