中小尺寸竖井圆形地下连续墙的施工监测与数值分析  

Construction Monitoring and Numerical Analysis of Circular Underground Diaphragm Wall with Small and Medium-Sized Shafts

作　　者：董琼英 肖尊群 汤东桑 邓震 曹童童 DONG Qiongying;XIAO Zunqun;TANG Dongsang;DENG Zhen;CAO Tongtong(School of Xingfa Mine Technology,Wuhan Institute of Technology,Wuhan 430074,China;Wuhan Construction Engineering Group Co.,Ltd,Wuhan 430056,China;China Petroleum Pipeline Anti-Corrosion Engineering Co.,Ltd,Langfang 065001,China)

机构地区：[1]武汉工程大学兴发矿业学院,湖北武汉430074 [2]武汉建工集团股份有限公司,湖北武汉430056 [3]中油管道防腐工程有限责任公司,河北廊坊065001

出　　处：《武汉工程大学学报》2020年第5期552-557,共6页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金(51308424);武汉工程大学第十一届研究生教育创新基金(CX2019102)。

摘　　要：基于工程实例,对中小尺寸圆形地下连续墙的施工过程中墙体应力、钢筋应力、墙侧土体压力等参数监测并进行分析。采用有限元软件Abaqus建立该竖井施工过程的数值模型,研究结果表明:中小尺寸圆形地下连续墙纵向截面不存在明显的受拉区和受压区,整个墙体表现为受压状态。同时,墙体的入土深度对墙体水平位移、墙侧土压力的影响很小。中小尺寸圆形地下连续墙结构设计不需要采用传统的竖向弹性地基梁法确定结构配筋和入土深度。由于墙体自稳性强、刚度高,顺做法与逆作法的弯矩与剪力相似,在保证安全的状况下,可使用顺作法施工提高施工速度。Taking engineering as examples,we monitored and analyzed the stresses of wall,reinforcement,and soil pressure on the wall side during the construction of circular underground diaphragm walls with small and medium-sized shafts(CUDWMSS).The finite element software Abaqus was used to establish the numerical model of the construction process of the shaft.Research indicates that there is no obvious tensile or compression zone on the longitudinal section of the CUDWMSS,and the whole wall is under compression.In addition,the buried depth of the wall has little effect on the horizontal displacement and the soil pressure on the side of wall.The structural design of the CUDWMSS does not require the traditional vertical elastic foundation beam method to determine the structural reinforcement and the burial depth of wall.Due to the strong self-stabilization and high rigidity of the wall,the bending moment and shear with bottom-up or top-down construction method are similar.Under the safe circumstances,the bottom-up construction method can speed up the construction.

关 键 词：圆形地下连续墙 有限元 入土深度 土压力 竖向弹性地基梁法 

分 类 号：TU4[建筑科学—土工工程]