研究目的:作为设计的基础资料，物探与铁路工程设计所要求的精度还有相当距离。造成差距的主要原因之-是目前存在-些疑难技术问题，这些疑难问题严重制约了铁路工程物探技术的发展，通过对疑难问题进行探讨，引起有志于促进和发展物探技术的国内外专家及同仁的关注，并进行立题研究和攻关。
研究结论:(1)疑难问题归纳起来表现在干扰与分辨率的矛盾、物性差异与分辨率的矛盾以及勘探深度与分辨率的矛盾;(2)由于疑难问题的制约，现阶段在应用物探解决铁路工程问题时，应注意其资料的局限性和所能达到的实际应用效果;(3)如果这些疑难问题能够得到解决或部分解决，将大大提高物探在铁路工程地质勘察中解决问题的能力和精度，物探技术将取得重大突破。
Research purposes ： As basic data for the design, there is a great difference in the comparison of data precision of geophysical exploration with expected precision of engineering design. Some difficult technical problems are one of causations resulting in the differences. These difficult problems badly restrict development of geophysical exploration technology on railway. Putting forward and discussing these difficult problems is to arouse the experts and colleagues at home and abroad paying attention to and solving these difficult problems.
Research conclusions :(1) The difficult problems can be summed up as contradiction of disturbance with resolution ratio, contradiction of difference of physical properties with resolution ratio and contradiction of depth of exploration with resolution ratio. (2) Due to restriction of the difficult problems, it is notable especially that defection of the application effect on geophysical exploration. (3) If the difficult problems are solved or partly solved, the ability and precision of geophysical exploration will be greatly enhanced in railway engineering geological investigation, and it will be tremendous development on geophysical exploration technology.
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