摘要
旨在推动被动源面波技术在工程场地勘察中的使用,介绍了该方法的基本技术环节。为提高现场测试工作效率,研制了一种重量轻、功耗低、成本便宜的无线检波器,并介绍了其技术要点。在某风力发电场岩土工程勘察中采用了被动源面波技术,试验证明了无线检波器的可靠性;并进一步在一老采空区的初步探查阶段使用了被动源面波技术,获得的采空层深度范围和地质资料基本吻合。2个实测实例表明:在工程场地勘察中有效的利用被动源面波探查技术可以经济高效完成初步勘察阶段的任务,且这种方法无需钻孔和人工激励,环境干扰小;研制的无线检波器可以进一步提高被动源面波测试的现场工作效率。
To promote the application of the passive surface wave survey in engineering site investigation,this paper presents two field testing case studies by using newly developed wireless geophones. Basic knowledge of the surface wave survey and two data processing methods were first introduced. The development of a light weight,low power consumption,low cost wireless geophone,being designed to improve field testing efficiency,was described.Technical considerations in the wireless geophone development were introduced. Two field tests were implemented for the validation purpose. In a wind farm soil seismic characterization,passive surface wave surveys were performed with three different sensors. Test results validated the reliability of the wireless geophone. The wireless geophones were then used in surface wave survey tests to estimate the depths of coal layers in an abandoned coal mine.The coal layer depths were successfully obtained by the analysis of dispersion images. These two field experiments indicated that the passive surface wave method,an environment friendly technology,can be economically used in preliminary engineering site investigations. The developed wireless geophone can effectively improve the efficiency of the passive surface wave field applications.
出处
《地震工程与工程振动》
CSCD
北大核心
2016年第3期16-24,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51208382)
土木工程防灾国家重点实验室自主课题(SLDRCE14-B-02)
深部岩土力学与地下工程国家重点实验室开放课题(SKLGDUEK1514)~~
关键词
被动源面波
无线检波器
风力发电场
采空区
场地勘察
passive surface wave
wireless geophone
wind farm
abandoned underground mine
engineering site investigation
