岩石隧道渗流模型试验相似材料的研制及应用

发布时间：2018-02-03 11:00

本文关键词： 岩石隧道渗流模型试验相似材料水压力排水量　出处：《哈尔滨工业大学学报》2017年09期 　论文类型：期刊论文

【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.
[Abstract]:In order to improve the reasonableness of seepage field analysis of rock tunnel, through a large number of proportioning tests with controlling permeability coefficient as the core, the surrounding rock suitable for rock tunnel seepage model test is put forward. New similar materials such as grouting ring and initial lining and their raw material ratio. Similar materials of surrounding rock are prepared from clay, fine sand and glass fiber, and similar materials of grouting ring are made from cement and carbon slag. The results show that with the increase of fine sand content, the permeability coefficient of surrounding rock similar materials increases nonlinear and the stability decreases gradually. Changing the content of glass fiber has no obvious effect on the permeability coefficient. The permeability coefficient of the similar material in the grouting ring is higher with the increase of the carbon slag content than the experimental value at the water head of 2.5 m with the linear increase than with the water head of 1.35 m. With the increase of the number of stacked layers of woven geotextile, the average permeability coefficient of the initial lining similar materials decreases rapidly and converges gradually, and the test results of the single permeability coefficient tend to be stable. In the same tunnel displacement, the water pressure at the bottom of the second lining arch is much greater than that at the arch top, and after gradually reducing the displacement of the tunnel, the water pressure of the arch is greater than that of the arch bottom, and the water regulating valve is close to closure. The water pressure of the arch roof and the arch bottom is close to the initial water pressure. The similar material has stable working performance and has been successfully applied in the engineering seepage test.
【作者单位】：交通隧道工程教育部重点试验室(西南交通大学);四川省交通投资集团有限责任公司;四川藏区高速公路有限责任公司;中国中铁二院工程集团有限责任公司;
【基金】：国家重点研发计划(2016YFC0802210) 国家自然科学基金青年基金(51408494,51678499) 国家高技术研究发展计划(2014AA110401)
【分类号】：U456
【正文快照】： 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)隧道工程在提高土地利用率、缓解地面交通、减少环境污染等方面具有显著的优势,矿山法作为地下工程主流开挖工法被广泛应用于山岭隧道、水下隧道和城市隧道的建设中[1].隧道工程的

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