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斜面土钉支护墙的主动土压力，习惯上仍然是采用传统的朗肯土压力理论来进行计算，其值偏于保守。本文根据库伦无粘性土坡的一般土压力理论计算公式及相应主动土压力公式，求出斜面土钉支护墙的滑裂面与水平面的夹角η值，并给出斜面土钉支护墙的土压力计算公式。文中还给出常用范围内对朗肯主动土压力的折减数ζ，可供实际设计中选用。对粘性土坡，建议按等值内摩擦角法进行计算。
The active earth pressure of the inclined soil nailing wall is still customarily calculated using the traditional Rankine’s earth pressure theory, and its value tends to be conservative. In this paper, based on the general soil pressure theoretical formula of Kulun non-cohesive soil slope and the corresponding active earth pressure formula, the included angle η between the sliding surface and the horizontal plane of the slope soil nail retaining wall is obtained, and the inclined soil nail supporting wall is given. The earth pressure calculation formula. The paper also gives the reduced number of Rankine active earth pressures in the common range, which can be used for practical design. For cohesive soil slopes, it is recommended to use the equivalent internal friction angle method for calculation.