淤泥质地层深基坑施工力学机理模型试验研究  

Model Test Study on Mechanical Mechanism of Deep Foundation Pit Construction in Muddy Stratum

作　　者：于雅琳[1] 陈榕[2] 郝冬雪[2] 刘金龙[3] YU Yalin;CHEN Rong;HAO Dongxue;LIU Jinlong(School of Civil Engineering,Shandong University,Jinan 250061,China;School of Civil Engineering and Architecture,Northeast Dialtli University,Jilin 132012,China;Department of Civil Engineering,Hefei University of Technology,Hefei 230022,China)

机构地区：[1]山东大学土建与水利学院,山东济南250061 [2]东北电力大学建筑工程学院,吉林吉林132012 [3]合肥学院建筑工程系,安徽合肥230022

出　　处：《四川建材》2018年第10期98-99,102,共3页Sichuan Building Materials

摘　　要：深基坑工程设计需以开挖施工时的诸多技术参数为依据,但开挖施工过程中往往会引起支护结构内力和位移以及基坑内外土体变形发生种种意外变化,传统的设计方法难以事先设定或事后处理,针对海相软土地层大跨深基坑开挖的变形特性与有效的控制措施,特此进行深基坑施工模型试验研究,研究了海相软土工程力学特性、围护结构空间效应等多方面因素对深基坑施工失稳破坏的影响。分析结果表明:(1)在基坑开挖过程中,地下连续墙变形趋势呈弓形变化,且在开挖深度3/4处变形速率最大;(2)最大地表沉降随着开挖深度的增大而具有增大的趋势,基本为0.1%H～0.8%H,其平均值为0.38%H。Abstract ： The design of deep foundation pit engineering is based on many technical parameters during excavation construction, but the internal force and displacement of the supporting structure and the deformtion of the soil inside and outside the foundation pit often cause various unexpected changes in the excavation process. The traditional design method is difficult. Defommtion characteristics and effective control measures for large - span deep foundation pit excavation in marine soft soil layer are set in advance or afterwards. The model test of deep foundation pit construction is carl＇ied out, and the mechanical properties and enclosure of marine soft soil engineering are studied. The influence of various factors such as structural space effect on the instability failure of deep foundation pit construction. The analysis results show that： ①During the excavation of the foundation pit, the defommtion trend of the underground continuous wall is bow - shaped, and the deformation rate is the largest at the excavation depth of 3/4 ;②The maximum surface settlement with the excavation depth It increases and has an increasing tendency,which is basically between O. 1% H and O. 8% H,and the average value is 0.38% H.

关 键 词：淤泥质黏土 深基坑 模型试验 沉降 

分 类 号：TU753[建筑科学—建筑技术科学]