基于塑料排水板和真空堆载预压的公路路基处理技术研究

Research on Quality Control of Long-span Prestressed Continuous Box Girder Cantilevered Construction

以广东南部沿海城市某道路工程为背景对真空联合堆载预压技术进行研究,阐述了该技术的施工工艺原理,结合该工程软土地基的力学指标及加固设计参数,确定了加载实施计划,并通过对固结度及沉降值公式联立预测得出施工段落总沉降量范围值和15年后工后沉降值。并结合实际沉降监测数据验证了理论总沉降量计算值计及预压加载实施计划的可靠性。

Based on a road project in a coastal city in southern Guangdong, studies the vacuum combined surcharge preloading technology, expounds the construction process principle of the technology, determines the loading implementation plan in combination with the mechanical indexes and reinforcement design parameters of the soft soil foundation of the project, and obtains the total settlement range value of the construction section and the post construction settlement value after 15 years through the simultaneous prediction of the consolidation degree and settlement value formula. Combined with the actual settlement monitoring data, the reliability of the theoretical total settlement calculation value and the preloading loading implementation plan is verified.