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水工隧洞设计(如圆形、马蹄形断面)在设计规范中给出了计算方法和公式,并考虑了围岩的抗力作用.而进口段、渐变段在规范中没有给出计算公式,谈不上考虑围岩的反作用力即弹性抗力作用的影响.本文应用文克尔假定P=k.y,杆件变形的弹性曲线假定按sin~2ρ变化,而其弹性抗力e值也服从这个规律,利用变位平衡原理推导出仅有侧向,上、下侧向弹性抗力的矩形二孔,矩形四孔框架的弹性抗力e值的计算公式.并给出常见荷载的杆件固端力矩、中点挠度公式及弹性抗力系数K值.
Hydraulic tunnel design (such as circular, horseshoe cross-section) in the design specifications are given in the calculation methods and formulas, and consider the resistance of the surrounding rock effect, while the import section, tapered section in the specification did not give the formula, not to mention We consider the influence of the elastic force of the reaction force of the surrounding rock.In this paper, we use the assumption that Winkel P = ky, the elastic curve of the deformation of the rod is assumed to change according to sin ~ 2ρ, and its elastic resistance e value also obeys this law, Equilibrium principle, the formula of elastic resistance e of rectangular two-hole and rectangular four-hole frame with lateral, upper and lower lateral elastic resistance is deduced, and the formula of common endurance torque and mid-point deflection And elastic resistance coefficient K value.