深基坑通长型GFRP筋杆体施工关键技术与性能研究

Study on Construction Key Technology and Performance of GFRP Bar Body in Deep Foundation Pit

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中图分类号：TU47 文献标志码：A 文章编号：1005-8249（2025）01-0069-05

DOI：10.19860/j.cnki.issn1005-8249.2025.01.014

( ， 1OOO28， China）

Abstract：Inorder toimprove theconstructionapplicationefectoffull-length glassfiberreinforcedplastic（GFRP）bars in deepfoundationpitengineeingundercomplex stressinfluence，the keyconstruction technologiesand performanceof fulllength GRPbars indepfoundationpitengineeringarestudied.Theanchoringendofthefull-length GFRPreinforcementrod adoptsanew typeofclip，anda pressureplateisadded totheanchoring body.Calculatetheeccentriccompresive bearing capacity ofGFRPeinforcementinthe normalsection，obtainthequantityandspecificationsoffull-length GFRPreinforcement required forthecurrentsupportarea，andensure thesupport efectTheresults indicatethatthe32mmdiameterreinforcement rodburstwhensubjected toatensileforceofapproximately1OOOkN.Themaximumdisplacementofthefoundationpitwallat 6m is about 15mm. The optimal clamp hardness is determined to be 80% of GFRP hardness and the optimal anchor thickness is 6cmbasedon stress cloudimages andloaddisplacementdata.Theconstructiontechnologystudied has godapplication ffects in supporting construction.

Key words： deep foundation pit；glass fiber reinforced plastic； full-length；anchor support；coupler

0 引言

深基坑开挖后，坑壁土体失去了原有的支撑，在自身重力和周边土体压力作用下，有变形坍塌的风险。（剩余10171字）