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季节变动带内岩溶隧道,枯水季节隧道涌水主要由含水层中的静储量以及地下暗河的枯期动储量构成,丰水季节由静储量及洪水期地下暗河动储量构成。由于降雨通过地表的洼地、落水洞迅速补给地下暗河,涌突水的剧增将对隧道施工带来极大的危害。因此,季节变动带内岩溶隧道涌突水危险性评价尤显重要。本文以滇东高原某岩溶隧道K5+850~K10+800段为例,根据段内枯水期稳定涌水量和雨季最大涌水量预测结果和岩石的可溶性(K1)、地质构造因素(K2)、地表汇水条件(K3)、地下水化学特征(K4)、隧洞埋深与地下水位的关系(K5),分别进行了涌突水危险性评价。最后以段内地面暴雨前后实际涌水量变化验证涌突水危险性评价结果。
Seasonal changes within the karst tunnel, the water inflow in the dry season tunnel mainly by the static reserves of aquifers and the dry reserves of underground underground river constitute, wet season by the static reserve and flood during the underground movement of underground river composition. Due to the rainfall through the surface of the depression, sinkhole quickly replenishment underground underground river, sudden surge of water surge will bring great harm to the construction. Therefore, the evaluation of the risk of water inrush in the karst tunnels within the seasonal variation is particularly important. In this paper, taking K5 + 850 ~ K10 + 800 of a Karst Tunnel in the Eastern Yunnan Plateau as an example, according to the predictions of the steady water inflow in the dry season and the maximum inflow of rainy season, the results of the prediction of the K1, K2, Water condition (K3), chemical characteristics of groundwater (K4), the relationship between the depth of the tunnel and groundwater level (K5), respectively. Finally, the actual influx of water changes before and after heavy rain on the ground to verify the water burst risk assessment results.