| 粉细砂层富水岩溶处置方案研究 |
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| 引用本文： | 翁长根,管强,陈中华. 粉细砂层富水岩溶处置方案研究[J]. 铁道建筑技术, 2020, 0(2): 54-58 |
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| 作者姓名： | 翁长根 管强 陈中华 |
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| 作者单位： | 中铁十一局集团第五工程有限公司 |
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| 基金项目： | 重庆市技术创新与应用示范重点研发项目计划(cstc2018jscxmszdX0029);中铁十一局集团有限公司科技研究开发计划(17-AⅡ-10)。 |
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| 摘 要： | 本文针对溶洞发育规模大、含水量大、水压高且邻近既有隧道,提出"溶洞高位泄水洞+溶洞超前帷幕注浆+大管棚支护"的综合施工方案,并对不同水灰比的水泥净浆进行强度试验,另添加不同比例的水玻璃进行双液浆试验,最终选定水灰比为0.8:1、水泥浆与水玻璃体积比为1:0.5的双液浆作为施工浆液。最后,通过钻芯取样以及孔内成像技术对注浆效果进行验证。研究成果可为类似铁路隧道溶洞处置提供依据。
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| 关 键 词： | 岩溶处置 帷幕注浆 室内试验 效果验证 |
Study on Treatment scheme for Water-rich Karst Geology in Silt and Fine Sand Layer |
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| WENG Changgen,GUAN Qiang,CHEN Zhonghua. Study on Treatment scheme for Water-rich Karst Geology in Silt and Fine Sand Layer[J]. Railway Construction Technology, 2020, 0(2): 54-58 |
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| Authors: | WENG Changgen GUAN Qiang CHEN Zhonghua |
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| Affiliation: | (China Railway 11th Bureau Group 5th Engineering Co.Ltd.,Chongqing 400037,China) |
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| Abstract: | Aiming at the karst caves with large scale,large water content,high water pressure and adjacent to existing tunnels,this paper proposes a comprehensive construction method of"karst cave high drainage tunnel+karst cave advanced curtain grouting+large pipe shed support".Through laboratory tests,the strength of cement paste with different water cement ratio is tested,and different proportion of water glass is added.The double-slurry test was carried out,and finally the double-slurry with water cement ratio of 0.8:1 and volume ratio of 1:0.5 was selected as construction slurry.Finally,the grouting effect of the slurry is tested by core sampling and borehole imaging technology.The research results could provide a basis for treating karst caves in similar railway tunnel engineering. |
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| Keywords: | karst treatment curtain grouting laboratory test effect validation |
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