山岭隧道构造承压水涌水量分析  

Analysis of structural pressurized water inflow in mountain tunnel

作　　者：张宇彬 ZHANG Yubin(Fujian Communications Planning&Design Institute Co.Ltd.,Fuzhou 350004)

机构地区：[1]福建省交通规划设计院有限公司,福建福州350004

出　　处：《福建建筑》2025年第2期104-108,共5页Fujian Architecture & Construction

摘　　要：隧道围岩渗透系数是计算涌水量、确定围岩级别的关键。利用抽水试验计算地层渗透系数,受诸多假设条件的限制。受限于客观条件,基本不存在与假设条件完全吻合的抽水试验。以某高速一座隧道的涌水钻孔抽水试验为例,受钻孔涌水及抽水能力的影响,第一降深的流量与降深值误差较大,采用二次降深代替三次降深法,对涌水钻孔的抽水试验数据进行修正,对比分析原始数据计算的渗透系数及修正后计算的渗透系数,并采用均差法进行验证。结果表明,在Q-S曲线的曲度系数接近2时,采用指数方程或对数方程将曲线曲度系数修正为1,得到的流量、降深值基本一致。用修正后的数据按照裘布依承压水模型计算的渗透系数,与均差法计算的渗透系数相差不大,符合实际情况,可作为山岭隧道构造承压水渗透系数修正的方法,为山岭隧道涌水量计算提供依据。The permeability coefficient of tunnel surrounding rock is the key to calculate water inflow and determine the level of surrounding rock.Use pumping tests to calculate the permeability coefficient of strata is limited by many assumed conditions,As limited by objective conditions.There is almost non-existent pumping test that completely matches the assumed conditions.Taking the water inflow drilling and pumping test of a certain highway tunnel as an example,due to the influence of drilling water inflow and pumping capacity,The discharge and drawdown value of the first depth reduction have significant error.To use second drawdown method instead of the third drawdown method to correct the pumping test data of the water inflow drilling.The permeability coefficient calculated from the original data and the modified permeability coefficient are compared and analyzed,and use divided different scheme to verification.The results show that when the curvature coefficient of the Q-S curve is close to 2,using exponential or logarithmic equations to correct the curvature coefficient to 1,the discharge and drawdown values are basically consistent.Using the modified data according to the Qiubuyi pressure water model to calculate the permeability coefficient,The result is not significantly different from the permeability coefficient calculated using the mean difference method,which is in line with the actual situation.It can be used as a method for correcting the permeability coefficient of pressure water in mountain tunnel construction,providing a basis for calculating the water inflow of mountain tunnels.

关 键 词：山岭隧道 承压水 抽水试验 涌水量 

分 类 号：U45[建筑科学—桥梁与隧道工程]