跨孔地震CT层析成像在岩溶物探中的应用
Application of cross-hole seismic CT tomography in karst geophysical exploration
梁成龙 1龚子龙 2梁一鸣 1张莉 1戴蕾滟 1高鑫怡1
作者信息
- 1. 温州理工学院韧性城市生命线工程智慧防护应急技术重点实验室,浙江 温州 325000
- 2. 深圳市勘察测绘院(集团)有限公司,广东 深圳 518000
- 折叠
摘要
用跨孔地震CT层析成像技术对建筑场地的地层进行高精度的探测,获取勘察场地测试孔间的地层信息和不良地质体分布情况,从而实现对建筑场地全尺寸的地质预报.通过引入尺寸误差和区位误差参数,结合软件反演成像进一步分析,评价跨孔地震CT层析成像技术对于建筑场地地层探测效果、尺寸探测效果.结合钻孔勘察结果,将跨孔地震CT层析成像分析结果绘制成综合地质解释剖面图,可得到场地全尺寸范围内的地层情况.针对不同的探测目标,地震波的探测精度主要受探测目标体与周围环境之间地震波传播速度差异的影响决定.结果表明,将跨孔地震CT层析成像应用在岩溶物探中是可行的,结合地层信息可较清晰地了解地质情况,有利于后期的设计和施工.
Abstract
The cross-hole seismic CT tomography technology is used to detect the strata of the building site with high pre-cision,obtain the formation information between the test holes of the investigation site and the distribution of bad geolog-ical bodies,so as to achieve the purpose of full-size geological prediction of the building site.Through the introduction of dimension error and location error parameters,combined with software inversion imaging further analysis,the effect of cross-hole seismic CT tomography on the formation detection and dimension detection of building sites is evaluated.Com-bined with the drilling survey results,the cross-hole seismic CT tomography analysis results are drawn into a comprehen-sive geological interpretation profile,which can obtain the full size of the site stratum.For different detection targets,the detection accuracy of seismic wave is mainly affected by the difference of seismic wave propagation velocity between the de-tection target and the surrounding environment.Finally,according to the results and conclusions of the analysis,it can be seen that the application of cross-hole seismic CT tomography in karst geophysical exploration is feasible,and the geolog-ical conditions can be clearly understood in combination with the formation information,which is conducive to the later de-sign and construction.
关键词
跨孔地震波/CT层析成像方法/勘察/岩溶Key words
cross-hole seismic waves/CT tomography methods/investigation/karst exploration引用本文复制引用
出版年
2025
NETL
NSTL
万方数据