地下连续墙液压抓斗在粘壤土地层施工中偏斜角度分析  

Analysis of deviation angle of hydraulic grab for diaphragm wall in theconstruction of clay loam strata

作　　者：金赠伍 王清岩[1,2] 盛洁 钟蔚岭 JIN Zengwu;WANG Qingyan;SHENG Jie;ZHONG Weiling(College of Construction Engineering,Jilin University,Changchun Jilin 130026,China;Key Laboratory of Drilling and Exploration Technology in Complex Conditions,MNR,Changchun Jilin 130026,China;China Water Northeastern Investigation,Design and Research Co.,Ltd.,Changchun Jilin 130061,China)

机构地区：[1]吉林大学建设工程学院,吉林长春130026 [2]自然资源部复杂条件钻采技术重点实验室,吉林长春130026 [3]中水东北勘测设计研究有限责任公司,吉林长春130061

出　　处：《钻探工程》2024年第2期39-46,共8页Drilling Engineering

摘　　要：在液压抓斗进行地下连续墙施工过程中,斗体需要保持一定的垂直度以保证侧壁成槽精度。抓斗掘削部与土体相互作用时,作用于斗体上的载荷具有瞬态多向性且不均匀,由此导致钢丝绳下放的斗体发生偏斜,成槽壁面垂直度受到破坏。本文建立了液压抓斗多体动力学模型和粘壤土地层模型,通过多体动力学和离散元相结合的方法分析了液压抓斗在粘壤土地层施工过程中斗体倾斜情况,设计了电液比例调速回路以控制液压抓斗主液压缸运动,通过联合仿真重点讨论了主液压缸控制信号对斗体偏斜过程的影响,为进一步研究液压抓斗纠偏系统及控制策略提供依据。During the construction of diaphragm wall using hydraulic grab,the grab needs to maintain vertical to ensure the accuracy of the side wall trench formation.When the excavation part of the grab interacts with the soil,the load acting on the grab has the characteristics of transient multidirectivity and non⁃uniformity,which leads to the deviation of the grab lowered by the steel rope and damages of the verticality of the trench wall surface.This article established a multi⁃body dynamic model of hydraulic grab and a clay soil layer model.Through the combination of multi⁃body dynamic and discrete element method,the tilt of the grab during the construction process of the hydraulic grab in the clay soil layer is analyzed,and an electro⁃hydraulic proportional speed control circuit to control the movement of the main hydraulic cylinder of the hydraulic grab is designed.Through joint simulation,the influence of the control signal of the main hydraulic cylinder on the tilt process of the grab is emphatically discussed,which provides a basis for further research on the hydraulic grab deviation correction system and control strategy.

关 键 词：液压抓斗 斗体偏斜 电液比例调速回路 控制信号 联合仿真 粘壤土地层 

分 类 号：TU753[建筑科学—建筑技术科学] P634[天文地球—地质矿产勘探]