在山东大学和济南奥体中心体育场工地,采用探地雷达对岩溶地基进行探测,快速有效地查明了岩溶裂隙的发育情况。工程实例说明,在工程应用中,前期需深入分析地质勘测资料,合理确定探测参数,探测中需与工程钻探等方法相结合,不断积累经验,以求获得良好的工程效果。

In the construction sites of Shandong University and Central Stadium for Olympic Games in Jinan, the ground-penetrating ra-dar was adopted to investigate the karst foundation and, as a result, the development situation of karst fissures was ascertained rapidly and effectively. Engineering practice shows that, in the engineering application, geological survey data should be analyzed thoroughly at the early stage to rationally determine the detection parameters, and the investigation should be combined with such methods as engi-neering drilling so as to continuously accumulate experience and obtain satisfactory engineering results.

综合运用跨孔地震CT、探地雷达、高密度电阻率法、浅层地震反射波、土壤氡浓度和波速测试6种物探方法,对广州市白云区金沙洲岩溶地面塌陷、地面沉降地质灾害进行探测,查明了该区的溶洞、土洞及构造破碎带的分布。介绍了各种方法技术,对综合物探成果进行总结,结合实例说明综合物探方法在该区的应用取得了显著效果,为地质灾害防治提供了基础地质资料。在广花盆地岩溶发育区,首次应用跨孔地震CT探测建筑物地下岩溶分布,为评价受岩溶地质灾害影响的建筑物安全提供依据。

With the comprehensive use of cross-hole seismic CT technique, ground penetration radar, high density resistivity method, shallow seismic reflection wave method, soil radon concentration and bore wave velocity test method, the authors detected geological hazards of karst ground collapse and ground subsidence in Jinshazhou area, Baiyun district of Guangzhou city. The distribution of karst caves, soil caves and tectonic fracture zones was detected. The authors utilized all kinds of methods and techniques and summarized the results of integrated geophysical techniques. With practical examples, it is proved that integrated geophysical techniques are efficient in the investigation of karst ground collapse and ground subsidence geological hazards, and can provide important basic data for geological disaster prevention. The first cross-hole seismic CT was applied to detecting the distribution of structures of underground karst in Guang-hua basin, thus providing a basis for the safety of struc

岩溶易引起路基坍塌和下沉，是严重危害铁路运输安全的路基病害。本文采用探地雷达和多道瞬态面波相结合的综合地球物理探测方法，对青藏铁路 K1333+000—K1333+660段石膏岩路基进行探测。结果表明，该段路基存在多处岩溶病害及岩溶引起的次级病害。后期的钻孔结果验证了本次测试的准确性。采用探地雷达和多道瞬态面波综合物探技术，能够较为全面、高效地检测路基中可能存在的隐患，可为及时采取加固处理措施提供依据。

As one of the major safety concerns in rail transport,karst is prone to trigger subgrade collapse or settlement. Comprehensive geophysical exploration technology was applied,where ground penetrating radar and multi-channel transient surface wave are combined,to detect the gypsum subgrade at K1333 +000—K1333 +660 section on Qinghai-T ibet railway. T he results which are proven consistent to that of the drilling conducted afterwards show that multiple karst defects and secondary karst-induced defects can be found. T herefore,it can be said that the integrated approach applied in this paper is able to locate any possible defect,so as to carry out necessary reinforcement accordingly.

灰岩分布区易发生岩溶塌陷等地质灾害,高密度电阻率法是岩溶地质调查的重要手段。以某一段穿越岩溶发育区的公路为例,应用高密度电法对区内暗河、槽谷型岩溶塘、落水洞等灾害地质体进行了探测,结果显示拟建路段覆盖层厚度大约为2~20 m,基岩内岩溶极发育,岩石地表起伏大,溶沟、溶槽、岩溶塌陷、落水洞发育；岩石中溶蚀裂隙、溶洞发育。表明高密度电阻率法能够有效地判定岩溶的发育情况,可以为地质灾害评估提供科学客观的依据。

Karst collapse can easily happen in limestone distribution area. High density resistivity method is an important method for karst geological detection. In this paper, taking the detection of a certain roadbed as an example, by using high density resistivity method, geological disasters have been detected, such as under-ground river, valley type karst sinkhole and pond. It is showed that thickness of covering layer in constructing area is about 2~20m. Karst developed well in bedrock. Large wavy in surface, well developed karren, solu-tion groove, karst collapse and ponor, corrosion cracks in rocks and well developed karst rocks. It is showed that high density resistivity method can effectively judge the development of karst. It can provide a scientific ba-sis for the evaluation of geological disaster.

高密度电法具有成本低、效率高、信息丰富等优点，已成为常见物探方法之一。本文介绍了高密度电法的应用实例，说明了高密度电法勘探技术在岩溶洞穴、地质灾害等探测领域具有较好的探测效果。

High-density electrical method has the advantages of low cost, high efficiency, rich information, which has become one of the common geophysical prospecting methods. This paper describes the application example of high-density electrical method, and high-density electrical prospecting technology has the better detection effects in the fields of karst caves, geological disasters and so on.