武汉大桥条带东段地区岩溶发育特征  

Karst Development Characteristics in the Eastern Section of theWuhan Bridge Belt

作　　者：霍玉龙 彭警 郑思维 周政 HUO Yu-long;PENG Jing;ZHENG Si-wei;ZHOU Zheng(Institute of Seismology,China Earthquake Administration,Wuhan 430071,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;Hubei Earthquake Agency,Wuhan 430071,China)

机构地区：[1]中国地震局地震研究所,武汉430071 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071 [3]湖北省地震局,武汉430071

出　　处：《科学技术与工程》2024年第34期14581-14589,共9页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(42074015);湖北省地震局科研业务费(2022HBJJ017)。

摘　　要：为探究大桥条带东段岩溶发育特点和岩溶顶板厚度规律,总结岩溶裂隙水类型及补给规律,建立考虑注浆量和充填情况因素的岩溶分类模型。通过统计分析和K-means聚类分析等方法研究了研究区岩溶规律。结果表明:存在严重漏水的溶洞占44.44%,轻微漏水~漏水占18.52%,不漏水占37.04%,溶洞填充物处于软塑状态的占36.54%,流塑-软塑状态占26.92%,可塑状态占19.23%,其余状态占17.31%。注浆量与状态系数呈负相关关系,与溶洞高度和顶板厚度呈正相关关系,溶洞高度对注浆量影响最大。小于某溶洞洞高值对数值和溶洞个数呈线性函数关系,小于某顶板厚度概率实测值和顶板厚度满足三次函数关系;溶洞未填充占12.16%,半填充占9.46%,完全填充占78.38%;见洞率25.52%,平均线岩溶率7.69%,平均洞高2.87 m, 1/3的洞高度小于1.4 m, 1/2的洞高度小于2.2 m, 90%的洞高小于5.5 m,溶洞以竖向发育为主,单位溶洞高度注浆量为0.88 m^(3);研究区岩溶裂隙水为HCO_(3)-Na·Ca型水体,岩溶裂隙水主要补给来源于孔隙水;采用K-means聚类算法开展评估和分类,将溶洞划分为两类:第一类注浆量平均值为24.50 m^(3),填充物状态系数平均值为0.38,溶洞高度平均值为2.32 m;第二类注浆量平均值为2.36 m^(3),填充物状态系数平均值为0.57,溶洞高度平均值为5.98 m,轮廓系数为0.84,分类模型该精度较高,该模型可用于解释溶洞空间上的发育等情况。In order to explore the karst development characteristics and the thickness of karst roof in the eastern section of the bridge belt,the water types and recharge rules of karst fissures were summarized,and a karst classification model considering the grouting amount and filling situation was established.Statistical analysis and K-means cluster analysis were used to study the karst law in the study area.The results show that 44.44%of the caverns with serious leakage,18.52%with slight leakage-leakage,and 37.04%with no leakage,36.54%of the cavern fillers are in the soft plastic state,26.92%are in the flow-plastic-soft-plastic state,19.23%were in the plastic state,and the rest of the state accounted for 17.31%.The grouting volume is negatively correlated with the state coefficient and positively correlated with the cavern height and roof thickness,and the cavern height has the greatest influence on the grouting volume.The logarithmic value of cave height and the number of caves are linear,and the measured value of the probability of the thickness of the roof plate and the thickness of the roof plate meet the cubic function.The unfilled caves account for 12.16%,the semi-filled caves account for 9.46%,and the completely filled caves account for 78.38%.The rate of seeing caves is 25.52%,and the average rate of linear karst is 7.69%.The average cave height is 2.87 m,and the height of 1/3 caves is less than 1.4 m,and 1/2 caves are less than 1.4 m.The average hole height is 2.87 m,1/2 of the hole height is less than 2.2 m,90%of the hole height is less than 5.5 m,the hole is mainly developed vertically,and the grouting volume per unit of hole height is 0.88 m^(3);the karst fissure water in the study area is of the HCO_(3)-Na-Ca type,and the main recharge of the karst fissure water comes from the pore water;the assessment and classification are carried out by using the K-means clustering algorithm to classify the caves into two categories,and the grouting volume of the first category is 24.50 m^(3) on average,with the average

关 键 词：岩溶地质灾害 岩溶裂隙水 K-MEANS 相关性 注浆量 

分 类 号：P642[天文地球—工程地质学]