Study on the Quality Classification of Rock Mass in Tectonic Mixed Rock Belt
DOI:
https://doi.org/10.64862/Keywords:
Engineering geomechanics, Traffic corridors, Tectonic mixed rock belts, Rock mass quality classificationAbstract
In the field of geological engineering, the complexity and variability of tectonic mixed rock belts in plateau and mountainous areas have brought great challenges to the construction of transportation engineering. In order to reveal the distribution law and engineering effect of rock mass in these areas, this study summarized the geological setting, lithologic assemblage and tectonic development of two typical tectonic mixed rock belts in Jinsha Jiang River and Jiali-Yi gong. Through systematic investigation and analysis, combined with key parameters such as rock saturated uniaxial compressive strength and rock mass integrity index, a set of rock mass quality classification scheme for tectonic mixed rock belts was established, which not only considered the internal structure of the rock mass, but also took into account the influence of external environmental factors such as stress field and groundwater conditions. On this basis, a tunnel and a slope in the two tectonic mixed rock belts were selected as typical cases to carry out rock mass quality classification and engineering geological evaluation, and the results showed that the rock mass quality of the tectonic mixed rock belt was closely related to lithological assemblage and structural development. The rock mass quality classification scheme proposed in this study can accurately reflect the actual condition of rock mass, and can provide a reference for the evaluation of rock mass quality classification in complex engineering geological environment areas such as tectonic mixed rock belts.
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