现有水平受荷桩地基水平抗力系数的比例系数m值取值通常是基于天然地基的水平面假设，而对斜坡地基情况下，m值取值至今没有相应的规范或者经验可循。为了研究碎石土地基斜坡上地基水平抗力系数的比例系数m值的取值，通过室内水平静载试验研究斜坡碎石土地基桩基水平承载特性，探讨m值随斜坡坡度的变化情况，提出了基于水平碎石土地基m值来确定不同斜坡坡度碎石土地基m值的修正公式和相应的取值范围，并通过现场试验进行了验证，为山区工程建设时m值的取值提供一定的参考。研究结果表明：斜坡碎石土地基m值取值范围为23～65 MN/m4，并且m值随着坡度的增大而减小。

For determination of the ground horizontal resistance coefficient, m, of a pile under lateral loading, we usually assume horizontal surface for natural soil foundations. However, there has been no relevant standards or experiences for evaluating the coefficient m for inclined ground. In order to evaluate the coefficient of ground horizontal resistance of gravel soil on slopes, static lateral loading tests are conducted in laboratory to examine the horizontal bearing behaviors of a pile embedded in the gravel soil slope. The variation of m value of the subgrade with slope gradient is discussed. A formula modified using m value for horizontal gravel soil ground is used to determine the m value of gravel soil foundation on slopes with different gradients. The suggested range of m value is provided in the procedure. The applicability is verified by field test. It is shown that the m value ranges from 23 to 65 MN/m4, and decreases as the gradient of slope increases.