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（1 南寧學(xué)院土木與建筑工程學(xué)院， 南寧 530299； 2 廣西大學(xué)土木建筑工程學(xué)院， 南寧 530004；3 廣西大學(xué)工程防災(zāi)與結(jié)構(gòu)安全教育部重點(diǎn)實(shí)驗(yàn)室， 南寧 530004；4 廣西瑞宇建筑科技有限公司， 南寧 530031）

［摘要］采用彈塑性共同變形法和彈性支點(diǎn)法對(duì)兩個(gè)錨索鋼板樁基坑支護(hù)工程進(jìn)行計(jì)算分析，比較這兩種方法的計(jì)算結(jié)果，并將計(jì)算結(jié)果與現(xiàn)場(chǎng)監(jiān)測(cè)數(shù)據(jù)進(jìn)行對(duì)比。結(jié)果表明：由于錨索鋼板樁支護(hù)存在樁變形大、抗彎剛度小及錨索預(yù)應(yīng)力較大的特點(diǎn)，彈塑性共同變形法更適宜用于錨索鋼板樁支護(hù)結(jié)構(gòu)的計(jì)算，而彈性支點(diǎn)法則嚴(yán)重低估鋼板樁水平位移，并影響錨索最優(yōu)位置的選擇。最后，參考彈塑性共同變形法，提出了一種基于彈性支點(diǎn)法的修正計(jì)算方法，該方法可修正彈性支點(diǎn)法對(duì)錨索鋼板樁支護(hù)結(jié)構(gòu)的計(jì)算誤差，為錨索鋼板樁支護(hù)結(jié)構(gòu)設(shè)計(jì)提供了一種新方法。

［關(guān)鍵詞］基坑； 彈塑性共同變形法； 彈性支點(diǎn)法； 支護(hù)結(jié)構(gòu)； 鋼板樁； 錨索

中圖分類號(hào)：TU476-4文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)02-0131-06

Comparative study of elastic-plastic common deformation method and elastic fulcrum method in the design of steel sheet-pile supporting structure with anchor cable

LU Yi1, OU Xiaoduo2,3, TAN Zhijie2, LIU Renzhou4

(1 College of Civil Engineering and Architecture, Nanning University, Nanning 530299, China; 2 College of Civil Engineering, Guangxi University, Nanning 530004, China;3 Key Lab of Engineering Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University,Nanning 530004, China;4 Guangxi Ruiyu Construction Technology Co., Ltd., Nanning 530031, China)

Abstract:The elastic-plastic common deformation method and elastic fulcrum method were used to calculate and analyze two anchor cable steel sheet-pile foundation pit supporting projects. The calculation results of the two methods were compared, and the calculation results were compared with the field monitoring data. The results show that, due to the characteristics of large deformation and low bending stiffness of the pile and large pre-stress of the anchor cable steel sheet-pile support, the elastic-plastic common deformation method is more suitable for the calculation of the anchor cable steel sheet-pile support structure, while the elastic fulcrum method seriously underestimates the horizontal displacement of the steel sheet-pile and influences the selection of optimal position of the anchor cable. Finally, referring to elastic-plastic common deformation method, a correction calculation method based on the elastic fulcrum method is proposed, which can correct the calculation errors of the elastic fulcrum method on the anchor cable steel sheet-pile support structure and provide a new method for the design of the anchor cable steel sheet-pile support structure.

Keywords:foundation pit; elastic-plastic common deformation method；elastic fulcrum method; support structure；steel sheet-pile； anchor cable

*南寧市優(yōu)秀青年科技創(chuàng)新創(chuàng)業(yè)人才培育項(xiàng)目（RC20190208）。

作者簡(jiǎn)介：盧毅，碩士，助教，Email：luyinnxy@163.com。