摘要:研究目的:宁安高铁地处长江以南丘陵地区，湖塘密布，地质条件复杂，铁路沿线可溶岩分布范围较广， 碳酸盐岩分布的地段均有岩溶发育，溶蚀现象明显，岩溶发育程度多为中等发育和强烈发育，溶洞多呈串珠 状，高铁建设面临的难题是如何有效查明自然地理和地质情况，根据溶洞发育程度，选择适宜的路基、桥梁方 案，并做好结构沉降控制。基于此，本文开展岩溶地区勘察勘探方法及对应的结构物设计方案研究，从而保证 设计的可靠性。研究结论:（ 1)岩溶地区勘察应精细调查分析，超前谋划组织，科学管理实施，宜采用钻探取芯试验、地震 CT法和管波物探等新技术进行综合勘探，查明岩溶地段岩溶发育和分布情况；（2)岩溶强烈发育地段，考虑 工程处理难度及费用，建议有条件情况以桥代路通过;（3)岩溶地段路基宜根据“先探后灌、探灌结合”的原则 进行注浆动态设计;（4)岩溶区桥梁桩基础宜根据逐桩钻探资料，布置桩基基础展布图，桩基础需要穿透溶 洞，支撑于底部稳定的基岩上，采用不等长桩设计;（5)本研究成果可为岩溶地区地质勘察勘探及结构物地基 设计提供理论指导和科学依据。

Abstract ； Research purposes ： Nanjing - Anqing High Speed Railway is located in hily region of the south of the Yangtze River， with many lakes and ponds， complex geological conditions， and widely distributed karst alongthe railway. The areas of carbonate distribution have karst development， and corrosion phenomenon is obrious， karst development degree is medium development and intensive development，the cave is bead - shape，high - speed railway construction is facing how to effectively identify the physical geographical and geological conditions， according to the karst development degree， choose the suitable scheme for subgrade and bridge， and to control the settlement of the structure. Therefore，the investigation and exploration methods of karst areas and the corresponding structural design schemes are carried out to ensure the reliability of tlie design. Research conclusions;( 1 ) The karst prosj^ecting should be fine investigation and analysis， advance planning organization，implementation of scientific management，which should adopt the core drilling test，seismic CT method and wave tube technology of geophysical exploration，to find out karst development and distribution of tlie karst area. (2) In the karst development area，considering the difficulty and cost of the project，it is suggested that the railway should be replaced by the bridge. (3 ) The subgrade in karst areas should be designed according to the princij^le of 11 first exploration，post irrigation and exploration irrigation" . (4) The bridge pile foundation in karst area should be arranged according to the pile drilling data, the distribution of the pile foundation is arranged，the pile foundation needs to penetrate the cave, and is supported on the bottom stable bedrock. (5) The research results can provide theoretical guidance and scientific basis for geological exploration，exploration and structural foundation design in karst area.