翼式地下综合管廊受力性能试验与数值分析

Mechanical performance test and numerical analysis of wing type underground comprehensive pipe gallery

综合管廊出于设计安全角度考虑通常用料极多而导致性能“过剩”,管廊结构体优化后既可保证结构安全又为实际工程节约材料,对其优化设计是提高效能、促进行业精细化发展的有效手段。文章基于现有综合管廊结构模型,参考实际工程经验,设计出一种新型薄壁摩擦受力型翼式地下综合管廊,根据竖向加载试验结果分析了沉降规律,并通过数值模拟验证了新型结构的安全性。结果表明:在上部施加实际工程的荷载工况下,新型管廊结构的形变值约为8.175 mm,满足变形与沉降控制标准;综合管廊的外伸支撑锚杆体与管廊协同受力变形,并且与土体产生的摩擦作用,较好的减缓了沉降变形速率,在平衡土体重力与外加荷载时产生了重要作用。

Considering the safety in design,comprehensive pipe gallery usually uses too much materials,resulting in“excess”performance.After optimization of pipe gallery structure,it can not only ensure structural safety but also save materials for actual engineering projects.Therefore,the optimized design of pipe gallery structure is an effective means to improve efficiency and promote the refined development of the industry.Based on the existing comprehensive pipe gallery structure model and practical project experience,this paper designs a new type of thin-wall friction stress comprehensive pipe gallery,analyzes the settlement law according to the test settlement results,and verifies the safety of the new structure through numerical simulation.The results show that the deformation value of the new pipe corridor structure is about 8.175 mm under the actual engineering load condition applied from the upper part,which meets the standard of deformation and settlement control.The overhanging supporting bolt body of the comprehensive pipe gallery is in coordination with the pipe gallery to bear the force and deform,and the friction effect with the soil can reduce the settlement deformation rate,which plays an important role in balancing the soil gravity and the applied load.