某大桥施工栈桥安全检算

某公路特大桥,跨越公安县的某河流,因施工期间河水暴涨,流速大增,导致施工栈桥的钢管桩顶端偏离原来的竖直位置。虽然偏移量不大,但为确保安全,对该栈桥进行了检算。计算依据极限状态法,用MIDAS软件进行。计算结果显示:该栈桥各项指标满足相关要求,能够安全使用。实际的使用情况也验证了计算结果。

On the Check-Calculation of the Safety of the Construction Trestle Bridge for a Certain Bridge

During the construction of a certain mega bridge spanning a certain river in Gong＇an County, the top end of the steel-tube pile of the construction trestle bridge displaces from its original vertical position as a result of the rapid rise of the water level of the river and the sudden increase in the speed of flow. Although the amount of the displacement is not much, the safety of the trestle bridge is checked to ensure safety. The check-calculation is performed by means of the Ultimate-State Method with the MIDAS software. The re- sult of the check-calculation proves that the various targets of the trestle bridge are up to the corresponding requirements, which means the trestle bridge may be safely used. The practical use of the trestle bridge proves the calculated result reliable.