水文地质工程地质2025，Vol.52Issue(3)：91-101,11.DOI:10.16030/j.cnki.issn.1000-3665.202404004
无连梁双排抗滑桩与单排抗滑桩水平推桩模型试验对比
Comparison of horizontal push-pile model tests between non-beam double-row anti-slide piles and single-row anti-slide piles
摘要
Abstract
In large-scale landslide control engineering design,the selection of anti-slide pile support is a critical design consideration.To investigate the effectiveness of double-row anti-slide piles compared to single-row reinforcement for slopes,this study conducted comparative tests of unconnected double-row piles and single-row piles using a large-scale physical simulation model,and the differences in slope damage modes and pile force characteristics were analyzed in depth.The results indicate that during slope failure,single-row piles exhibit soil arching effects between the piles,while double-row piles form"eight"-shaped cracks due to flow around the piles,with the rear piles experiencing bending.Both single-row and double-row piles exhibit four stages of deformation characteristics in their pile head displacement curves:densification deformation,elastic deformation,accelerated deformation,and plastic failure.In the accelerated deformation stage,the pile head displacement of rear piles is approximately twice that of front piles for double-row piles,and for single-row piles,it is approximately 1.5 times that of the front piles.Due to the"shielding effect",the anti-slide effect of double-row piles is approximately 15％higher than that of single-row piles.The lateral soil pressure along the pile body generally exhibits a triangular-trapezoidal distribution,with the soil pressure behind the pile greater than that in front of the pile.Regarding pile bending moments,both exhibit a distribution trend similar to a parabola,with the maximum moment occurring near the sliding surface(7 cm above it).Additionally,under the same horizontal thrust,the rear pile experiences the maximum bending moment,followed by the single-row pile,while the front pile experiences the minimum bending moment.The presence of rear piles reduces the maximum bending moment of front piles by approximately 27％compared to single-row piles,thus enhancing the anti-slide effect of the pile.These findings provide guidance for the design and treatment of landslide control engineering projects.关键词
无连梁双排抗滑桩/水平推桩/受力特性/破坏模式/对比试验Key words
non-beam double-row anti-slide piles/horizontal push-pile/force characteristics/failure mode/comparative experiment分类
交通运输引用本文复制引用
汤科,郑达,程儒凇..无连梁双排抗滑桩与单排抗滑桩水平推桩模型试验对比[J].水文地质工程地质,2025,52(3):91-101,11.基金项目
国家自然科学基金项目(42293353) （42293353）
自然资源部丘陵山地地质灾害防治重点实验室自主课题(KLGHZ202101) （KLGHZ202101）
地质灾害防治与地质环境保护国家重点实验室自主研究课题(SKLGP2022Z002) （SKLGP2022Z002）
