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西气东输二线(西二线)工程江河顶管穿越是我国首次大规模长距离、复杂地质河流顶管穿越工程,因地质结构复杂、地下水压高以及地层岩性变化大等条件限制,顶管施工难度较大。通过对西二线顶管工程实践和存在的施工问题进行分析,提出我国复杂地质河流顶管特殊技术要求:完善现有顶管工程设计规范,明确更加具体的物探资料;根据顶管机性能和设备配置等完善针对性较强的顶管施工规范;从技术、装备等方面改进复杂地质竖井施工能力;结合工程实际制定复杂地质河流顶管工程费用测算和工程管理制度,为类似河流岩石顶管工程提供技术支持和保障。
Pipe jacking through the river is the first large-scale long-distance and complicated geologic river pipe jacking project in China. Due to the complicated geological structure, high groundwater pressure and large changes in lithology of the strata, the pipe jacking Construction is more difficult. Through the analysis of the construction practice of the second pipe jacking project in West China and the existing construction problems, the paper puts forward the special technical requirements of pipe jacking in the complex geological river in our country: perfecting the existing design standards of pipe jacking engineering and specifying the more specific geophysical data. According to the performance and equipment of pipe jacking machine, Configuration and other perfect pipe jacking construction specifications; from the technical, equipment and other aspects to improve the performance of complex geological shaft construction; combined with the actual project to develop a complex geological river pipe jacking project cost estimates and project management system for similar river rock pipe jacking project Provide technical support and protection.