GFRP筋地下连续墙的工作性能分析

在地下连续墙中盾构穿越区域采用GFRP筋代替钢筋，可以使盾构机进出洞时直接切削地下连续墙掘进，简化了施工工艺，加快了施工进度，减少了施工风险，节约了投资。但是，GFRP筋地下连续墙在开挖及地下结构施工过程中的工作性能和变形分布规律及影响因素等尚不明确。为此，本文对GFRP筋地下连续墙进行了施工全过程的有限元分析和现场监测，并将有限元分析结果与现场监测数据作了对比，在此基础上进行了影响因素分析，并提出了设计和施工建议。

An Analysis on Service Behavior of Diaphragm Wall Reinforced with GFRP Bars

GFRP bars can be substituted for steel bars at the soft-eye openings for tunnel shield in diaphragm wall. It allows the shield to cut diaphragm wall directly, consequently simplifies the construction process, speeds up the working progress, reduces risks and saves the investment. By now, however, the service behavior and the deformation distribution or its contributory factors of GFRP diaphragm wall are not ascertained. A study on the deformation properties of GFRP diaphragm wall is made during the whole process of excavation and inner structures construction in this paper by means of FEM analysis and field measurements. By comparing the FEM results with the data of field measurements, the contributory factors are studied. Some suggestions are made for design and construction.