多年冻土区的综合物探技术研究  

Study on Comprehensive Geophysical Prospecting Technology in Permafrost Region

作　　者：习建军 李党民[2] 邸龙 王彦兵[4] Xi Jianjun;Li Dangmin;Di Long;Wang Yanbing(Power China Hebei Electric Power Design ＆ Research Institute Co.,Ltd.;Northwest Electric Power Design Institute;School of Prospecting Technology＆ Engineering,Hebei University of Geosciences;State Grid Beijing Economic and Technological Research Institute)

机构地区：[1]中国电建集团河北省电力勘测设计研究院有限公司,石家庄市050031 [2]西北电力设计院有限公司,西安市710075 [3]河北地质大学勘查技术与工程学院,石家庄市050031 [4]国网北京经济技术研究院,北京市102209

出　　处：《勘察科学技术》2018年第4期30-35,共6页Site Investigation Science and Technology

摘　　要：在冻土区修筑工程构筑物面临冻胀和融沉两大危险。准确判定多年冻土上下限及变化,对工程的设计和处理有重要意义。该文针对多年冻土区单一物探方法勘察存在局限性的问题,以多年冻土的电阻率、介电常数和地震波速度等地球物理特征为依据,对对称四极电测深、瞬态面波、探地雷达和高密度电法等多种物探方法适用性进行了分析与总结,提出了多年冻土区综合物探技术,解决多年冻土上下限、季节冻土与多年冻土的分区界线、岛状多年冻土及岛状融区、多年冻土的含冰量、多年冻土区的工程地质问题的勘察方案。该方案通过各方法优势互补,提高了多年冻土区勘察的准确率。When the engineering structure is built in the permafrost area,the two dangers of frost heave and thaw collapse must be faced. It has great significance to design and handle the project by accurately determining the upper and lower limits and changes of permafrost. Aiming at the problem of limitation existing in prospecting by single geophysical prospecting method in permafrost region,in this paper,based on the geophysical characteristics of resistivity,permittivity,seismic wave velocity and so on of permafrost region,the applicability of some geophysical prospecting methods such as symmetrical quadrupole sounding,transient surface wave,GPR,high-density resistivity method are analysed and summaried. A reconnaissance plan which can solve the upper and lower limits of permafrost,the boundary between seasonal frozen soil and permafrost,island like permafrost and island melting area,ice content in permafrost,and engineering geological problems in permafrost region by using the comprehensive geophysical prospecting technique is proposed. Through complementing the advantages of every method,the accuracy of the survey in permafrost regions is improved by this plan.

关 键 词：多年冻土 冻土上下限 多年冻土含冰量 综合物探 

分 类 号：P642.14[天文地球—工程地质学] P631[天文地球—地质矿产勘探]