| 某隧道出口堆积体边坡成因机理及综合治理方案研究 |
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| 引用本文： | 李江,梁玺,吴银亮.某隧道出口堆积体边坡成因机理及综合治理方案研究[J].路基工程,2021,0(4):232-236. |
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| 作者姓名： | 李江 梁玺 吴银亮 |
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| 作者单位： | 汕头市地方公路事务中心,广东汕头 515000;中交一公局华南工程有限公司,广州 511311;中交第二公路勘察设计研究院有限公司,武汉 430056 |
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| 摘 要： | 以穿越一处大型崩塌堆积体的重庆市某公路隧道出口工程为依托，从堆积体的地质情况、物质组成等综合分析其成因机理，进而通过堆积体边坡的位移监测数据和典型计算剖面对其稳定性展开定量评价。结果表明:此崩塌堆积体在长时期地质作用下，总体保持自然稳定状态，但在降雨因素作用下稳定性系数为1.254～1.604，没有足够的安全富余量，需要采取反压坡脚等措施增强坡体的稳定。最终提出该边坡的综合治理方案，消除了隧道出口崩塌堆积体的工程安全隐患，保障了交通运营的安全。
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| 关 键 词： | 隧道 堆积体 成因机理 位移监测 稳定性 治理方案 |
| 收稿时间： | 2021-05-07 |
Study on Formation Mechanism and Comprehensive Treatment Scheme of an accumulation Body Slope at the Exit of the Tunnel |
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| Abstract: | Based on the project of the exit of a highway tunnel in Chongqing passes through a large collapse accumulation body, this paper analyzes the formation mechanism of the accumulation body from its geological condition and material composition, and then quantitatively evaluates its stability through the displacement monitoring data and typical calculation section of the accumlation body slope. The results show that the collapse accumulation body maintains a natural stable state under the long-term geological process, but the stability coefficient is 1.254～1.604 under the influence of rainfall. There is not enough safety margin, so it is necessary to take measures such as back pressure on the slope toe to enhance the stability of the slope body. It puts forward the comprehensive treatment scheme of the slope finally. The hidden safty danger of the stability of the collapse accumulation body at the exit of the tunnel is eliminated and the safety of traffic operation is ensured. |
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