Research on mechanism of damage of anhydrock in dolomite layer to tunnel structure

LIU Yan-min; YU Hong-ming; WANG Can; WANG Chun-lei

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Research on mechanism of damage of anhydrock in dolomite layer to tunnel structure

更新时间：2026-06-25

- Research on mechanism of damage of anhydrock in dolomite layer to tunnel structure
- Vol. 32, Issue 9, (2011)
- 作者机构：
  
  中国地质大学（武汉）工程学院,武汉,430074
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU45
- Online First：13 September 2011，
  
  Published：2011
- 稿件说明：
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LIU Yan-min, YU Hong-ming, WANG Can, et al. Research on mechanism of damage of anhydrock in dolomite layer to tunnel structure[J]. 2011, 32(9).
DOI：

LIU Yan-min, YU Hong-ming, WANG Can, et al. Research on mechanism of damage of anhydrock in dolomite layer to tunnel structure[J]. 2011, 32(9). DOI：

摘要

以杭兰公路宜巴段白云岩层中不规则发育的硬石膏岩为研究对象，采用X-衍射试验、离子色谱分析、环境扫描电镜及能谱分析等试验手段，定量研究硬石膏岩对隧道结构的危害。研究结果表明，硬石膏岩对隧道结构的危害主要表现在其水化膨胀作用、溶蚀产生的硫酸盐侵蚀及其溶出的酸性环境对白云岩溶蚀的加剧作用。在此基础上，结合区域工程地质条件，提出硬石膏岩及其与白云岩耦合溶蚀作用下的隧道混凝土防护结构劣化机制。给出以降低地下水水位及提高混凝土性能为主的类似工程治理建议。

Abstract

Taking the irregular developed anhydrock in dolomite layer of Yi-Ba section which located in Hangzhou-Lanzhou highway as research object

and adopting test methods such as X-ray diffraction experiment

ion-chromatographic analysis

environmental scanning electron microscopy and energy spectrum analysis tests

it is mainly quantitatively analyzed the damage of anhydrock to the tunnel structure. The result shows that the damage to the tunnel structure mainly displayed in hydration-swelling action

sulfate erosion generated by corrosion and the aggravation of dolomite corrosion by acid environment. On this basis

combining with regional engineering geological condition of this area

this paper proposes the deterioration mechanism of the tunnel concrete protective structure under anhydrock and the coupled corrosion action of the anhydrock and dolomite. Finally

it gives treatment suggestions for the similar engineering

mainly by lowering the groundwater level and improving the performance of the concrete.

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