Assessment on safety of lattice girder reinforced shotcrete support for Tunnels 隧道格栅钢架喷混凝土支护安全性评价
This work improves the so-called displacement-based method and addresses the very real need of assessing the safety of lattice girder shotcrete support during tunnel construction. 实例分析表明,所提方法的评价结果能够正确反映隧道的实际安全状态,得到的可靠指标也与我国规范所要求的范围相一致。
The field observation pays more attention to research on the change regulations of pressure acting on first lining and invert, axial force of lattice girder, contact stress between first and second lining, concrete strain of second lining verse the time and distributions in different positions. 研究了一衬和仰拱围岩压力、格栅拱架钢筋轴力、一衬和二衬接触压力以及仰拱和二衬混凝土的应力应变随时间变化规律及分布特性。
Through observation in field of the shallow highway tunnel lining in loess, authors research the change of the surrounding rock pressure on tunnel lining, the axial force of lattice girder and the strain of second lining to the time and the distribution in different positions. 通过对浅埋黄土公路隧道衬砌受力现场测试,研究了隧道衬砌围岩压力、钢花拱轴力和二次衬砌混凝土应变随时间变化以及不同位置分布情况。
Test Research of Lattice Girder Support of the Gallery of the Mine Jinchuan 金川矿巷道格栅支护的试验研究
Based on the performance of new tunnel support structure of lattice girder, this paper suggests a calculating method of lattice girders with loading-construction and rock mechanics calculating systems. 本文从格栅支撑这一新型隧道支护结构的工作特性出发,分别提出了在荷载-结构和岩石力学两种计算体系下格栅支撑的检算方法。
Lattice Girder and Concrete Support for Tunnel in Unstable Strata 不稳定围岩隧洞中的钢格栅吊模混凝土支护
In order to ensure the safety, economy and advance rate of construction, the lattice girder and concrete support is adopted. 为保证工程安全、经济,加快进度,采用了钢格栅吊模混凝土支护,并将钢格栅分为轻、中、重三级与隧洞围岩的Ⅲ、Ⅱ、Ⅰ类相对应。
Various methods are used in the reinforcement program, such as anchor wire, rockbolt, anti-slide pile, steel-pipe pile, lattice girder and soil blocking wall, which have effectively raised the slope stability. 支护方案综合采用了锚索、锚杆、抗滑桩、钢管桩、格构梁及挡土墙等多种支护方法,有效地提高了边坡的稳定性。
The Calculation of deflection and wideth of fissure of various lattice girder in the normal limit condition 各类格式梁结构在正常使用极限状态下的挠度及裂缝宽度计算
Calculation of the internal force in a double-beam bridge lattice using a plate girder frame model 用板架模型计算双梁桥架的内力