运营隧道衬砌渗漏水机理及注浆治理研究

发布时间：2018-04-11 16:38

  本文选题：运营隧道 + 渗漏水机理　； 参考：《山东大学》2017年博士论文

【摘要】：随着国民经济的快速发展,我国交通、水电工程等领域陆续建设一大批重大基础工程,已是世界上隧道建设规模最大、发展速度最快、修建难度最高的国家。由于隧道地质条件、地应力作用及施工缺陷原因,衬砌开裂导致的渗漏水成为运营隧道主要的病害之一,对隧道结构的安全性和耐久性产生严重影响,威胁隧道安全健康,甚至危及到行车和行人安全。目前国内外缺乏对隧道衬砌破裂无损精细探查理论技术及注浆治理效果有效的无损评价方法,对隧道衬砌渗漏水及注浆封堵机理缺乏深入研究,运营隧道渗漏水病害治理已成为制约隧道健康服役的关键难题,开展运营期隧道衬砌渗漏水机理与注浆治理研究,具有重大的理论意义和工程价值。本文通过调查研究、数值模拟、模型试验及工程应用验证方法,深入研究了运营隧道衬砌渗漏水机理与注浆治理技术,主要研究成果如下:(1)采用非连续方法对富水破碎围岩隧道衬砌破坏进行了研究,揭示了衬砌支护时机、厚度、施工期注浆加固圈厚度、注浆加固效果、排水条件对隧道衬砌受力及开裂的影响规律。(2)采用有限差分方法研究了导水型断层隧道衬砌破坏渗漏水机理,揭示了不同倾角断层及不同渗透率对隧道衬砌受力及开裂的影响。研发了隧道衬砌渗漏水病害三维模型试验系统,以济南市旅游路开元隧道渗漏水治理工程为依托,开展了大型模型试验,揭示了隧道穿越断层时的围岩与衬砌的变形、受力、破坏与衬砌破裂渗漏水成因,得到了注浆封堵过程中排水对衬砌泄压的影响规律。(3)建立了单一非贯通裂隙注浆模型,揭示了单一非贯通裂隙注浆过程中的变形与注浆封堵机制。开展了不同注浆材料对不同倾角裂隙加固效果试验,基于裂隙衬砌等效代替方法,开展了有限元分析,揭示了注浆前后围岩应力、位移演化规律。(4)提出了基于地质雷达探测的隧道衬砌缺陷和病害精细检测及注浆加固效果评价方法,开展了系统的正演模拟与成像数值试验,建立了典型衬砌病害的地质雷达探测解释准则,提出了衬砌渗漏水病害注浆加固效果的评价标准和方法,最终形成了基于"反射图像、归位成像、频谱特征"综合分析的隧道衬砌缺陷和病害精细化检测以及注浆加固效果评价方法。(5)针对济南市旅游路开元隧道渗漏水治理工程,完成了隧道渗漏水统计和类型划分,采用本文提出的"反射图像、归位成像、频谱特征"综合分析的隧道衬砌缺陷和病害精细化检测理论技术,实现了衬砌开裂、空洞和渗漏水病害的较精确识别和定位,根据论文注浆材料室内试验成果和现场试验,确定了开元隧道注浆材料并进行实施。应用论文成果—基于地质雷达注浆加固效果的评价方法进行注浆效果评价,成功解决了开元隧道122处衬砌渗漏水封堵治理难题,取得良好的经济效益和社会效益。
[Abstract]:With the rapid development of the national economy, a large number of major basic projects have been built in the fields of transportation, hydropower engineering and other fields in China, which have become the countries with the largest scale, the fastest development speed and the highest difficulty in the construction of tunnels in the world.Because of the geological conditions, in-situ stress and construction defects, leakage caused by lining cracking has become one of the main diseases of the tunnel, which has a serious impact on the safety and durability of the tunnel structure and threatens the safety and health of the tunnel.Even endangers the safety of traffic and pedestrians.At present, there is a lack of effective non-destructive evaluation method for the theory and technology of non-destructive fine exploration of tunnel lining rupture and grouting treatment effect, and the deep research on tunnel lining leakage and grouting plugging mechanism.The treatment of tunnel leakage disease has become a key problem restricting the healthy service of tunnel. It is of great theoretical significance and engineering value to study the mechanism of tunnel lining leakage and grouting treatment during operation period.Through investigation and research, numerical simulation, model test and engineering application verification method, this paper deeply studies the leakage mechanism and grouting treatment technology of tunnel lining.The main research results are as follows: (1) discontinuous method is used to study the lining failure of water-rich broken surrounding rock tunnel, which reveals the lining support opportunity, thickness, grouting reinforcement ring thickness, grouting reinforcement effect,The influence of drainage conditions on the stress and cracking of tunnel lining. (2) the failure and leakage mechanism of tunnel lining with water-conducting fault is studied by means of finite difference method, and the influence of different dip faults and different permeability on the stress and cracking of tunnel lining is revealed.The 3D model test system of tunnel lining leakage disease is developed. Based on the seepage treatment project of Kaiyuan tunnel in Jinan City, a large-scale model test is carried out, which reveals the deformation and force of surrounding rock and lining when the tunnel passes through the fault.The causes of failure and leakage of lining rupture and leakage are obtained. The influence of drainage on the pressure release of lining during grouting and plugging is obtained. (3) A single non-penetrating fissure grouting model is established, and the deformation and grouting plugging mechanism in the grouting process of single non-penetrating crack are revealed.Based on the equivalent replacement method of crack lining, the finite element analysis is carried out, and the stress of surrounding rock before and after grouting is revealed.In this paper, a method of fine detection of tunnel lining defects and defects and evaluation of grouting reinforcement effect based on ground penetrating radar detection is put forward, and a systematic forward simulation and imaging numerical test are carried out.The criterion of geological radar detection and interpretation of typical lining diseases is established, and the evaluation standard and method of grouting reinforcement effect of lining leakage diseases are put forward. Finally, based on the reflection image, the image of homing is formed.Comprehensive analysis of tunnel lining defects and defects and evaluation method of grouting reinforcement effect. According to the leakage treatment project of Kaiyuan tunnel in Jinan tourist road, the statistics and classification of tunnel leakage water are completed.Based on the theory of "reflection image, homing imaging, spectrum characteristic", which is proposed in this paper, the tunnel lining defect and disease fine detection theory technology is proposed, which realizes the accurate identification and location of lining crack, cavity and leakage disease.According to the laboratory test results and field tests of grouting materials, Kaiyuan tunnel grouting materials are determined and implemented.The evaluation method based on the geological radar grouting reinforcement effect is applied to evaluate the grouting effect, which successfully solves the difficult problem of sealing and treating the leakage water of 122 lining lining in Kaiyuan Tunnel, and obtains good economic and social benefits.
【学位授予单位】：山东大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：U457.2
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本文编号：1736804