【摘要】 以三门核电一期循环冷却排水口工程的基坑开挖为背景,介绍了双排钢板桩围堰和水泥土挡墙结构协同设计技术,并对基坑与围堰整体稳定进行三维数值模拟。同时就钢板桩和挡墙在复杂水文地质条件下,发生的连续变形所采取的针对性加固措施及应用效果进行分析和探讨。实践表明,钢板围堰与水泥土墙协同设计技术有效解决了浅海滩涂区的软土基坑挡潮、支护难题。有关设计及应用分析成果可为类似工程设计、施工提供参考。更多还原

【Abstract】 Based on the engineering practice in the foundation pit excavation for circulating cooling water outfall of the first-stage project of Sanmen nuclear power station,the combined design technology of dou-ble-row steel sheet cofferdam and cement retaining wall were introduced in this paper and three-dimension-al numerical simulation of the overall stability of the supporting structure were conducted. The correspond-ing reinforcement measures and their application effects for the continuous deformation of the supporting structure under complex hydrogeological conditions were analyzed and discussed. This engineering practice showed that the combined design technology of double-row steel sheet cofferdam and cement retaining wall effectively solved the difficulty in preventing tide and supporting foundation pit in shoal excavation engineer-ing and could provide technical support for other similar projects.更多还原