Based on the point of safety assessment, the factors which affect railway transportation safety are analyzed, concluding that human is the main factor affecting the railway transportation safety.

从安全评价的角度出发，对影响铁路运输安全的因素进行了分析，得出人的因素是影响铁路运输安全的主要因素。

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For strict slice method the safety factor can be obtained by two equilibrium equations given the orientation or the point of force action between the slices.

对严格条分法，用二个平衡方程，并假设条间力的作用方向或条间力的作用点位置，就能求出安全系数。

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The equal safety factor method, imbalance thrust method, high-point equity method and reconnaissance criterion method can be used to analyze the double-slip body on the folding-line slope.

双滑块折线边坡稳定分析方法有等安全系数法、不平衡推力法、抗力体极限平衡法、岩土工程勘察规范法。

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