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将FLAC3D软件应用于边坡抗剪强度指标的反算,结合室内试验结果和工程经验确定边坡抗剪强度参数的取值区间,然后在该区间调整c、φ值,得到边坡安全系数Fs=1时的c-φ曲线。根据现场试验资料综合分析取得符合边坡实际的抗剪强度指标。为了便于比较,文中同时采用了传统的传递系数法和总和平衡法进行抗剪强度参数反算,得出相应计算结果。实例计算结果表明:采用数值分析方法克服了传统极限平衡理论反算法需要人为假定最危险滑动面和条间力大小及方向的缺点,所得结果更加合理、可靠。
The FLAC3D software is applied to the inverse calculation of the slope shear strength index, and the value interval of the shear strength parameter of the slope is determined according to the indoor test results and engineering experience. Then the c and φ values are adjusted in this interval to obtain the slope safety factor Fs = 1 when the c-φ curve. According to the comprehensive analysis of field test data obtained in line with the actual shear strength of the slope index. In order to facilitate the comparison, the traditional transfer coefficient method and the total balance method were used to back calculate the shear strength parameters, and the corresponding calculation results were obtained. The numerical results show that the method of numerical analysis overcomes the shortcomings that the traditional limit equilibrium theory inverse algorithm needs the most dangerous sliding surface and the force and direction of the bar, and the result is more reasonable and reliable.