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首页> 外文会议>Geotechnical Engineering for Disaster Mitigation and Rehabilitation >LONG-TERM CHARACTERISTICS OF SHOTCRETE LINING IN TEST TUNNEL
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LONG-TERM CHARACTERISTICS OF SHOTCRETE LINING IN TEST TUNNEL

机译：试验隧道内衬的长期特性

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摘要

This study is to evaluate long-term characteristics of shotcrete lining in test tunnel built in 1996 in Korea. Visual examination, carbonation depth, water analysis, compressive strength, X-ray diffraction (XRD) analysis, and Scanning Electron Microscope (SEM) and Energy Dispersive X-ray Spectroscopy (EDS) analyses were performed to evaluate the properties of shotcrete on long term. 6 shotcrete specimens were cored in the test tunnel, and ground water were collected at 2 positions in tunnel. From the visual examination, crack and efflorescence were widely existed on shotcrete surface. From the test results, pH values of groundwater and carbonation depth of shotcrete specimens were 7.42-7.50 and 3.1-22.8mm, respectively. The compressive strengths of shotcrete specimens by Schmidt hammer and uniaxial were 12.98-24.52MPa and 8.0-19.0MPa. The formation of gypsum and ettringite, which decrease the durability of shotcrete, was detected in the shotcrete specimens from the XRD, SEM, and EDS analyses. It is showed that the shotcrete have been deteriorated by chemical components in the groundwater.
机译：这项研究是为了评估1996年在韩国建造的试验隧道中喷射混凝土衬砌的长期特性。进行了目视检查，碳化深度，水分析，抗压强度，X射线衍射（XRD）分析，扫描电子显微镜（SEM）和能量色散X射线光谱（EDS）分析，以长期评估喷浆混凝土的性能。 。在试验隧道中取芯6个喷射混凝土标本，并在隧道的2个位置收集地下水。通过目测，喷射混凝土表面上广泛存在裂缝和风化。从测试结果来看，地下水的pH值和喷射混凝土的碳化深度分别为7.42-7.50和3.1-22.8mm。施密特锤和单轴喷射混凝土的抗压强度分别为12.98-24.52MPa和8.0-19.0MPa。通过XRD，SEM和EDS分析，在喷射混凝土样品中检测到了石膏和钙矾石的形成，从而降低了喷射混凝土的耐久性。结果表明，喷浆已被地下水中的化学成分所破坏。

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  • 会议地点 Nanjing(CN)
  • 作者

    ZHANG Hejie;

  • 作者单位

    Dong-Gyou Kim@Underground Structure Research Div., KICT, 2311 Daehwa-dong Ilsanseo-gu,Goyang-si, Kyeonggi, 411-712, Korea--Ho-Seop Jung@Underground Structure Research Div., KICT, 2311 Daehwa-dong Ilsanseo-gu,Goyang-si, Kyeonggi, 411-712, Korea--Kwang-Pil Park@Department of Civil Engineering, Daejin University, San 11-1 Seondan-dong Pocheon-si, Kyeonggi-do, 487-711, Korea--Seong-Soo Kim@Department of Civil Engineering, Daejin University, San 11-1 Seondan-dong Pocheon-si, Kyeonggi-do, 487-711, Korea--;

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  • 中图分类 灾害地质学;
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