矩形巷道临时支护装置关键部件的数值模拟

Numerical Simulation on Key Parts of Temporary Support Device in Rectangular Tunnel

在对矩形巷道临时支护装置关键部件的研制过程中,为了研究其顶梁对巷道不同载荷类型的适应性,以及导轨在立柱移动支撑条件下的受力,利用ANSYS对其分别进行结构力学分析,并对装置的稳定性进行现场测试。结果表明：顶梁在中心位置处位移最大,受高应力均布载荷时,顶梁长度为4 m时处于弹性状态,5 m时产生塑性破坏,说明该临时支护装置能适应4~5 m巷宽的支护需要;导轨在5#立柱处受力最为不利,应力集中程度最高,弯矩最大,因此,在导轨强度设计时,应着重考虑弯矩最大的5#立柱处的受力。经试验,支护装置压力稳定,动作灵活可靠,未出现漏液现象,基本实现了预定的目标和要求。

In the development process of key parts of temporary support device in rectangular tunnel,in order to study the adaptability of the top beam with different types of load as well as stress of the guide rail in the support of the column movement,structural mechanics analysis with ANSYS was done,and the stability of the device was tested on the spot. The research results showed that the largest displacement of the top beam was at the center position. Under high stress load,the top beam was in elastic state when length was 4 m,and plastic damage was done when length was 5 m,indicating that the temporary support device could adapt to the support of 4 m to 5m width. The guide rail at the 5#column force was the most unfavorable,the stress concentration degree was the highest,and the bending moment was the biggest. Therefore,in the strength design of the guide,the stress of the 5#column of the largest bending moment should be emphasized. After experiment,the pressure was stable,the action was flexible and reliable,and the phenomenon of leakage was not appeared. The scheduled goal and requirements was basically achieved.