4/6/2025, 9:29:10 AM 星期日
玄武岩纤维膨润土水泥膏浆的注浆加固工程应用研究
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作者:
作者单位:

1.有色金属成矿预测与地质环境监测教育部重点实验室(中南大学),湖南 长沙 410083;2.有色资源与地质灾害探查湖南省重点实验室,湖南 长沙 410083;3.中南大学地球科学与信息物理学院,湖南 长沙 410083;4.贵州省有色金属和核工业地质勘查局,贵州 贵阳 550005;5.中国石油管道局工程有限公司第四分公司,河北 廊坊 065000

中图分类号:

U455

基金项目:

中石油管道局科技计划项目“小断面泥水盾构水域溶洞群工程技术研究”(编号:KJZX-JSFW-2022-001)


Research on the application of basalt fibre bentonite-cement paste for grouting reinforcement engineering
Author:
Affiliation:

1.Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring;(Central South University), Ministry of Education, Changsha Hunan 410083, China;2.Key Laboratory of Non-Ferrous Resources and Geological Hazard Detection, Changsha Hunan 410083, China;3.School of Geosciences and Info-Physics, Central South University, Changsha Hunan 410083, China;4.Non-Ferrous Metals and Nuclear Industry Geological Exploration Bureau of Guizhou, Guiyang Guizhou 550005, China;5.No. 4 Branch Company of China Petroleum Pipeline Engineering Co., Ltd., Langfang Hebei 065000, China

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    摘要:

    岩溶塌陷是盾构法隧道工程穿越岩溶地层面临的关键问题之一,其不仅会对油气管道造成破坏,还会导致油气泄漏、破坏生态环境、威胁沿线居民生命财产安全等问题。针对湖南永州某地盾构法隧道穿越的岩溶地层溶洞发育特点,优选兼具良好流变性能和力学性能的玄武岩纤维膨润土水泥膏浆配方,开展玄武岩纤维膨润土水泥膏浆原位注浆充填加固实验,并通过钻孔取心和室内实验的方法检验了该注浆材料的加固效果,实验结果表明:钻孔取心获得的地层岩心密实,胶结强度较强,岩心采取率满足施工要求的80%;受地下水的影响,钻孔深度为6~7 m的注浆固结体28 d的无侧限抗压强度较小,平均为0.32 MPa,但试样较为完整;钻孔深度为7~8 m的注浆固结体28 d的无侧限抗压强度较6~7 m的注浆固结体增加了约5.36倍。采用玄武岩纤维膨润土水泥膏浆进行原位注浆充填加固的注浆固结体强度大于施工要求的强度指标,有效保障了岩溶地区盾构穿越工程的安全性。

    Abstract:

    Karst collapse is one of the key issues in shield tunneling through karst formations. It will not only cause damage to oil and gas pipelines, but will also lead to oil and gas leaks, damage to the ecological environment and threaten the lives and property of people living along the route. This paper is aimed at the characteristics of cave development in karst strata encountered by shield tunneling at a site in Yongzhou, Hunan Province. The formulation of a basalt fibre bentonite-cement paste with good rheological and mechanical properties was preferred. In-situ grout filling and reinforcement experiments with basalt fibre bentonite-cement paste were carried out, and the reinforcing effect of the grouting material was tested by means of borehole coring and indoor experiments. As a results, the cores obtained from the boreholes are dense and have a strong cementation strength. The core take rate meets 80% of the construction requirements. The 28d unconfined compressive strength of the grouted consolidation bodies drilled to a depth of 6~7m was small, averaging 0.32MPa, due to the influence of groundwater. But the cores were relatively intact. The 28d unconfined compressive strength of the grouted consolidation at a drilling depth of 7~8m increased by approximately 5.36 times compared to the grouted consolidation at 6~7m. The strength of the grouted solids reinforced by in-situ grouting with basalt fibre bentonite-cement paste is greater than the strength index required for construction, effectively guaranteeing the safety of shield crossing in karst areas.

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周生伟,孙平贺,曹函,等.玄武岩纤维膨润土水泥膏浆的注浆加固工程应用研究[J].钻探工程,2023,50(S1):520-525.
ZHOU Shengwei, SUN Pinghe, CAO Han, et al. Research on the application of basalt fibre bentonite-cement paste for grouting reinforcement engineering[J]. Drilling Engineering, 2023,50(S1):520-525.

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  • 收稿日期:2023-07-26
  • 最后修改日期:2023-08-14
  • 录用日期:2023-08-14
  • 在线发布日期: 2023-10-21
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