| 引用本文: | 李铮,何川,高翔,杨赛舟,骆耀文,杨文波.岩石隧道渗流模型试验相似材料的研制及应用[J].哈尔滨工业大学学报,2017,49(9):33.DOI:10.11918/j.issn.0367-6234.201607075 |
| LI Zheng,HE Chuan,GAO Xiang,YANG Saizhou,LUO Yaowen,YANG Wenbo.Development and application of a similar material for rock tunnel seepage model test[J].Journal of Harbin Institute of Technology,2017,49(9):33.DOI:10.11918/j.issn.0367-6234.201607075 |
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| 岩石隧道渗流模型试验相似材料的研制及应用 |
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李铮1,2,3,何川1,高翔1,杨赛舟1,骆耀文1,4,杨文波1
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(1.交通隧道工程教育部重点试验室(西南交通大学),成都610031;2.四川省交通投资集团有限责任公司,成都610000; 3.四川藏区高速公路有限责任公司,成都610000;4.中国中铁二院工程集团有限责任公司,成都610031)
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| 摘要: |
| 为提高岩石隧道渗流场分析的合理性，通过大量以控制渗透系数为核心的配比试验，提出适用于岩石隧道渗流模型试验的围岩、注浆圈及初衬等新型相似材料及其原料配比.试验以黏土、细砂和玻璃纤维为原料配制围岩相似材料，以水泥和炭渣配制注浆圈相似材料，由多层编织土工布模拟初衬相似材料.结果表明：随细砂含量加大，围岩相似材料渗透系数呈非线性增长，稳定性逐渐降低，改变玻璃纤维的含量对其渗透系数影响不明显；注浆圈相似材料渗透系数值随炭渣含量增加近于线性增长，2.5 m水头下的试验值较1.35 m水头时更大；随着编织土工布叠加层数增加，初衬相似材料平均渗透系数呈快速减小并逐渐收敛的趋势，且单次渗透系数测试结果也趋于稳定；相同隧道排水量时，二衬外拱底处水压力远大于拱顶，逐步减小隧道排水量后，拱顶水压力值上升幅度大于拱底，调水阀接近闭合时，拱顶和拱底位置的水压力接近初始水压力.研制的相似材料工作性能稳定，并成功应用于工程渗流试验中.
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| 关键词: 岩石隧道 渗流模型试验 相似材料 水压力 排水量 |
| DOI：10.11918/j.issn.0367-6234.201607075 |
| 分类号:U454 |
| 文献标识码:A |
| 基金项目:国家重点研发计划(2016YFC0802210)； 国家自然科学基金青年基金(4,9)； 国家高技术研究发展计划(2014AA110401) |
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| Development and application of a similar material for rock tunnel seepage model test |
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LI Zheng1,2,3,HE Chuan1,GAO Xiang1,YANG Saizhou1,LUO Yaowen1,4,YANG Wenbo1
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(1. Key Laboratory of Transportation Tunnel Engineering (Southwest Jiaotong University), Ministry of Education, Chengdu 610031, China; 2. Sichuan Transportation Investment Group Co., Ltd., Chengdu 610000, China; 3. Sichuan Tibetan Area Expressway Co., Ltd., Chengdu 610000, China; 4. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China)
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| Abstract: |
| To improve the rationality of seepage field analysis of rock tunnel, a new type of similar materials and the raw material ratio of surrounding rock, grouting circle and initial lining, etc, applied in rock tunnel seepage model test, have been developed through lots of proportioning tests taking the permeability coefficient as the core control variable. The surrounding rock similar material is compounded with clay, fine sand and glass fiber. The similar material of grouting circle is prepared by cement and carbon dross. And the multi-layer woven earthwork cloth is used to simulate the initial lining. The results indicate that the permeability coefficient of surrounding rock similar material presents nonlinear growth and the stability is gradually reduced with the increase of fine sand content. The permeability coefficient is not obviously influenced by the changes of the glass fiber content. The permeability coefficient of grouting circle similar material presents approximate linear growth with the increase of carbon dross content. The test value of 2.5 m hydraulic head is greater than that of 1.35 m. The average permeability coefficient of the initial lining similar material decreases rapidly as well as showing a trend of gradual convergence with the number of layers increased. The single permeability coefficient test result also tends to be stable. The water pressure of arch bottom outside secondary lining is far higher than vault's with the same tunnel discharge. And the vault's water pressure increases more than arch bottom's when water discharge gradually decreases. When approximately truning off the water valve, the arch bottom and vault's water pressure closes to the initial water pressure. The stable performance of similar material provides a guarantee for the application in the tunnel seepage field testing.
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| Key words: rock tunnel seepage model test similar material water pressure water discharge |
