不同桩身刚度条件下双排桩的边坡治理效果  

Slope Treatment Effect of Double Row Piles under Different Pile Stiffness

作　　者：钟明 ZHONG Ming(China Railway Shanghai Design Institute Group Co.,Ltd.,Guangzhou Branch,Guangzhou,Guangdong 510320,China)

机构地区：[1]中铁上海设计院集团有限公司广州分院,广东广州510320

出　　处：《黑龙江交通科技》2025年第1期20-24,共5页Communications Science and Technology Heilongjiang

摘　　要：桩身刚度是影响双排桩的边坡治理效果的重要因素之一,但在不同桩身刚度条件下双排桩的桩身内力、位移以及边坡治理效果尚需深入研究和探讨。针对此问题,利用数值模拟技术,对不同桩身刚度条件下双排桩的桩身内力、位移以及边坡治理效果进行研究。研究结果表明:(1)后排桩桩身刚度变化对桩身内力和位移的影响会随后排桩桩身刚度的增加而减小;(2)当后排桩桩身刚度大于两倍的前排桩桩身刚度时,后排桩桩身刚度的增加对边坡治理效果的提升较小。当后排桩桩身刚度为两倍的前排桩桩身刚度时,边坡稳定安全系数较天然工况下提升了32.6%,边坡最大位移较天然状态下降低了75%以上;(3)综合边坡治理效果与工程造价等因素,推荐使用后排桩桩身刚度为前排桩桩身刚度两倍的双排桩。Pile stiffness is one of the important factors affecting the slope treatment effect of double row pile,but the internal force,displacement and slope treatment effect of double row pile under different pile stiffness need to be further studied and discussed.To solve this problem,numerical simulation technology is used to study the internal force and displacement of double row piles under different stiffness conditions and the effect of slope treatment.The results show that:(1)The influence of pile stiffness change on pile internal force and displacement decreases with the increase of pile stiffness;(2)When the stiffness of the back pile is greater than twice the stiffness of the front pile,the increase of the back pile stiffness has a small improvement on the slope governance effect.When the stiffness of the back pile is twice that of the front pile,the safety factor of slope stability is increased by 32.6%and the maximum displacement of slope is reduced by more than 75%compared with the natural condition.(3)Considering factors such as slope treatment effect and project cost,it is recommended to use double-row piles with the stiffness of the back pile being twice that of the front pile.

关 键 词：双排桩 桩身刚度 边坡治理 桩身内力 数值模拟 

分 类 号：U445.55[建筑科学—桥梁与隧道工程]