考虑土拱效应的抗滑桩桩间距计算方法研究

抗滑桩桩间距是抗滑桩支挡工程中的重要设计参数。基于边坡工程中抗滑桩桩间土拱效应的研究，建立桩后土拱的计算模型，对土拱进行受力分析，在满足两侧土拱摩擦力与下滑推力静力平衡的条件下，以土拱受力最大截面的稳定性以及拱脚和跨中截面的强度要求来确定桩间距，並将桩间距计算式应用于具体的工程实例并优化，定性地说明桩间距在不同参数影响下的变化情况。

Study on Calculation Method for Spacing between Slide-resistant Piles Considering Soil Arch Effect

The spacing between slide-resistant piles is the important design parameter for the slide-resistant pile supporting work. Based on the research of the soil arch effect between the slide-resistant piles in slope work, a calculation model is established for the soil arch behind the piles to analyze the stress of the soil arch. Under the condition of meeting the friction force and downward thrust and static balance requirement of the soil arch on two sides, the maximum sectional stress stability of the soil arch and the strength of the arch foot and mid-span section are analyzed to determine pile spacing. The calcutation formula for the pile spacing is used for specified project case and optimized to qualitatively describe the change of the pile spacing caused by different parameters.