某海外火电厂挖方边坡最优坡度计算

Optimal grade calculation of excavation side slope in an overseas thermal power plant

位于丘陵地区的火电厂工程具有边坡工程多、挖方工程量大的特点,且往往位于抗震设防区域,挖方边坡坡度的大小直接影响工程的稳定性及经济性.为保证挖方边坡的稳定性及经济性,首先根据工程经验初选挖方边坡的坡度,计算边坡在一般工况和地震工况下的稳定安全系数,并与规范规定的安全系数进行比较,根据比较结果调整边坡坡度后重新进行稳定安全系数的计算,再与规范进行比较,逐步调整,最终求得挖方边坡的最优坡度.

Thermal power plants in hilly areas have the characteristics of much slope engineering and large excavation work;and they are also usually located in seismic fortification area.Therefore,the grade of excavation side slope directly affects the stability and economy of the project.In order to ensure both the stability and the economy,we select a grade of side slope according to engineering experiences;and then calculate the stability safety factor under general working condition and earthquake condition,meanwhile,compare with the limited stability safety factor in the code,adjust the grade of side slope as to the comparison result,and then recalculate the stability safety factor.The optimal grade of the excitation side slope can be get after gradually adjusting according the calculated results and the limited values in code.