岩溶地区公路修筑技术研究

为解决岩溶地区公路建设面临的工程技术、环境保护和可持续发展等诸多难题,通过大量调研分析、室内外试验、理论分析和数值计算,对岩溶地区公路建设中地质勘察、基础稳定性评价、筑路材料资源利用、工程病害处治和岩溶环境保护等五大方面的关键技术进行系统研究.开发了隐伏溶洞顶板变形监测技术与装置,隐伏溶洞精细探测技术,建立岩溶地区公路工程综合勘察技术体系;提出含隐伏溶洞地基公路路基稳定性评价方法、桥基承载力确定新方法;揭示岩溶水作用下路基变形破坏机理,提出相应公路岩溶病害防治技术;研发了路面抗滑耐磨材料、机制砂高性能混凝土;提出岩溶生态环境影响评价方法、公路路域植被变化规律,研发了岩溶水污染控制技术与处理设施等.

Research on Innovative Technologies for Highway Engineering in Karst Areas

To solve many challengeable problems such as engineering techniques, environment protection and sustainable development, etc.encountered in highway construction in karst areas, the key techniques including engineering geological survey, evaluation on highway foundation stability, utilization of pavement materials, treatments for karst diseases and environmental protection were studied comprehensively by massive investigation, experiments, field tests, theoretical analysis and numerical simulation.The in-situ technique and devices to monitor the deformation of underground cavity roof rock, the precise investigation techniques for underground cavity, and the systemic geological survey techniques for road engineering in karst areas were developed.The methods to evaluate the stability of subgrade which contains karst cavity and to determine the bearing strength of the bridge pile under karst cavity were addressed.The deformation damage mechanism of embankment caused by karst water was revealed and corresponding treatment techniques were proposed.The anti-skid pavement aggregates and high performance concrete mixed with manufactured sand were developed.The methods for environmental impact assessment, the change regularity of vegetation close to highway, and treatment techniques and equipments for karst water pollution were proposed.