倾斜止水帷幕复合土钉墙支护结构受力变形特点分析  

Analysis on the Mechanical Characteristics of the Composite Soil Nailing Wall with Inclined Curtain for Cutting off Water

作　　者：张军舰 李英杰 谭升 张勇 Zhang Junjian;Li Yingjie;Tan Sheng;Zhang Yong(Geotechnical Technology Co.,Ltd.,Hangzhou 311401,China;Qingdao Yutai Foundation Engineering Co.,Ltd.,Qingdao 266071,China;Geotechnical Investigation and Surveying Research Institute,Qingdao 266032,China;Qingdao Geotechnical Foundation Engineering Company,Qingdao 266032,China)

机构地区：[1]岩土科技股份有限公司,杭州311401 [2]青岛玉泰地基基础工程有限公司,青岛266071 [3]青岛市勘察测绘研究院,青岛266032 [4]青岛岩土基础工程公司,青岛266032

出　　处：《科技通报》2023年第12期55-61,共7页Bulletin of Science and Technology

摘　　要：本文首次对倾斜帷幕复合土钉墙支护结构受力变形特点进行研究,通过建筑基坑支护技术规程计算方法和有限元法对帷幕水平倾角β=90°、84°、74°、64°复合土钉墙支护结构进行计算分析。结果表明:β=84°~74°时,倾斜帷幕复合土钉墙支护结构在减少支护土压力、减少支护结构水平位移和竖向沉降方面效果明显,而β=64°时,效果已经不明显。倾斜帷幕复合土钉墙支护结构水平倾角β宜为84°~74°。同时将β=84°倾斜帷幕复合土钉墙支护结构应用于实际工程,其坡顶最终水平位移、竖向沉降均小于现行规范和标准要求。本文可为该类支护结构的应用提供参考数据。The mechanical properties of the composite soil nailing wall with inclined curtain for cutting off water support structure are studied for the first time,and the horizontal inclination angleβ=90°,84°,74°,64°composite soil nail wall support structure of the curtain is calculated and analyzed by the method of“Technical specification for retaining and protection wall of building foundation excavations”and finite element method.The results show that whenβ=84°-74°,the effect of inclined curtain composite soil nail wall support structure in reducing the supporting earth pressure,reducing the horizontal displacement and vertical settlement are obvious,while whenβ=64°,the effect is no longer obvious.The horizontal inclination angle of the inclined curtain composite soil nail wall should be 84°-74°.At the same time,the composite soil nailing wall with inclined curtain(β=84°)for cutting off water is applied to a project,and the final horizontal displacement and vertical settlement of the slope roof are less than the current specification and standard.This paper provides reference data for the application of this type support structure.

关 键 词：倾斜止水帷幕 复合土钉墙 深基坑支护 旋喷桩 预应力锚杆 

分 类 号：TU472[建筑科学—结构工程]