单排抗滑桩随机有限杆单元法计算的分析与研究

文章对桩前土体需要开挖情形下的随机有限杆单元法给出了新的详细的计算公式。由于滑坡和稳定体常为碎石土和风化的软岩,不适宜用静力触探研究相关范围（土性的自相关性）,因此本文用旁压试验m值对相关范围进行研究和计算。根据所作的大量抗滑桩并参照已有的研究成果（如Meyerhof的研究成果）,建议抗滑桩的可靠度与工程结构的可靠度取值同（即一级结构[β]=3.7、二级结构[β]=3.2、三级结构[β]=2.7）。这样处理,钢筋混凝土结构的许多成果均可移植到钢筋混凝土抗滑桩中。侧向地基系数Ch（p=b1mxy=b1Chy）为与土性及埋深有关的量,本文给出了用旁压试验推求m值的两种计算公式。

Analysis and research on the calculation of stochastic finite bar element method of the single-row anti-slide pile

In this paper,the formulas of new and detailed stochastic finite bar element method were supplied,which were applied to the condition that the soil body in the front of pile needed to be excavated.Because the slide-body and steady-body often were gravel soil and soft rock which was weathered,it was not appropriate to research the auto-correlation character with cone penetration test.So this paper calculated the auto-correlation character with the m parameter of pressuremeter test.Based on a great deal of engineering practices,our researches and others(such as Meyerhof),it suggested that the reliability index of anti-slide pile was equal to the reliability index of engineering structure(the first grade was 3.7,the second grade was 3.2,and the third grade was 2.7).Through this proceeding,a great deal of results about engineering structure can be used in the anti-slide pile reliability analysis.The lateral ground foundation coefficient C_h was in relationship with soil character and depth.We obtained two kinds of calculation formula of m with pressuremeter test.