基于“楔紧”作用的微型抗滑桩合理桩间距研究

Research on Reasonable Pile Spacing of Miniature Anti-slide Pile Based on “Wedging” Action

微型桩桩位灵活,施工时对周围环境扰动小,常用于滑坡抢险工程中,以重庆市沙坪坝区G319石花水库段纯土质边坡微型抗滑桩抢险工程为例,从微型桩内部“楔紧”作用出发,分析微型桩群桩效率,结合桩间土拱效应和桩后土拱效应,探讨基于“楔紧”作用的微型抗滑桩合理桩间距的计算模型,推导了微型桩桩间距合理范围计算公式,并将其应用于工程实践,结合工程监测数据,验证了桩身承载力及基于“楔紧”作用的微型抗滑桩合理桩间距计算模型的合理性。

Micro flexible pile position, construction on the surrounding environment disturbance is small, often used in landslide disaster, in Shapingba District, Chongqing, G319 period of pure micro anti-slide pile and soil slope engineering rock flowers reservoir as an example, from the micro pile internal "tight" wedge, the analysis of the micro pile group efficiency, combined with the soil arch effect between pile and pile been arch effect, discussed based on the “tight” wedge effect of the micro anti-slide pile is reasonable calculation model of pile spacing, the miniature pile spacing formula of reasonable range is deduced, and applied to engineering practice, based on the monitoring data, verify the bearing capacity of pile body and function based on the “wedge tight” reasonable micro anti-slide pile spacing of the rationality of the calculation model.