基于卸荷拱原理的桩板墙后土压力影响因素分析  

Analysis of influencing factors of earth pressure behind pile-slab wall based on unloading arch principle

作　　者：刘志江 Liu Zhijiang(Shangrao Kexin Soil and Water Conservation Monitoring Co.,Ltd.,Shangrao334000,China)

机构地区：[1]上饶市科信水土保持监测有限公司,江西上饶334000

出　　处：《吉林水利》2025年第1期67-70,78,共5页Jilin Water Resources

摘　　要：为探明桩间档土板后土压力的影响因素,以吉林省含强风化泥岩某边坡为研究对象,基于卸荷拱法,建立桩间土拱的力学计算模型,对比研究不同计算方法的挡土板后土压力计算的适用性,而后对桩板墙距宽比、土体粘聚力及内摩擦角等因素对挡土板后土压力的影响规律进行分析。结果表明,采用本文计算模型得到的土压力与筒仓法(规范法)计算结果较为接近,更符合工程实际;桩间挡土板上的土压力与桩板墙距宽比呈正比关系,与土体强度参数(粘聚力和内摩擦角)呈反比关系。In order to find out the influencing factors of the earth pressure behind the retaining plate between piles,a slope with strong weathered mudstone in Jilin Province is taken as the research object.Based on the unloading arch method,the mechanical calculation model of the soil arch between piles is established,and then,the applicability of the calculation of the earth pressure behind the retaining plate with different calculation methods is compared and studied.Finally,the influence of the factors such as the distance-width ratio of the pile-plate wall,the cohesion of the soil and the internal friction angle on the earth pressure behind the retaining plate is analyzed.The result shows that,the earth pressure obtained by the calculation model in this paper is close to the calculation result of the silo method(specification method),which is more in line with the engineering practice;the earth pressure on the retaining plate between piles is proportional to the distance-width ratio of the pile-plank wall,and inversely proportional to the soil strength parameters(cohesion and internal friction angle).

关 键 词：强风化泥岩 桩板墙 挡土板 土压力 距宽比 

分 类 号：TU432[建筑科学—岩土工程]