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（南華大學(xué)城市建設(shè)學(xué)院巖土工程系，衡陽 421001）

［摘要］某深基坑與周邊建筑物距離近，對變形要求高，設(shè)計(jì)采用了人工挖孔樁與錨索相結(jié)合的支護(hù)結(jié)構(gòu)。對錨索進(jìn)行了檢測與監(jiān)測，同時(shí)對支護(hù)結(jié)構(gòu)頂部水平位移進(jìn)行了監(jiān)測。結(jié)果分析表明，土層預(yù)應(yīng)力錨索的抗拔承載力與土層和錨固體之間的界面摩阻力有直接的關(guān)系，同時(shí)與錨索的施工質(zhì)量也密切相關(guān)，其破壞模式應(yīng)當(dāng)是注漿體與土層接觸面發(fā)生剪切破壞。監(jiān)測結(jié)果表明，基坑整體穩(wěn)定，樁錨支護(hù)結(jié)構(gòu)對變形起到了有效的控制作用。

［關(guān)鍵詞］樁錨支護(hù)結(jié)構(gòu)；設(shè)計(jì)；預(yù)應(yīng)力錨索；測試

Design for pile-anchor retaining structure and testing and analysis of prestressed anchor rope

Xiong Zhibiao, Wang Qiyun, Gu Danping(Geotechnical Engineering Department, School of Urban Construction, University of South China, Hengyang 421001, China)

Abstract:Pile-anchor system was adopted as the retaining structure for the foundation pit, which was close to the surrounding buildings and the deformation should be rigorously controlled.Testing and monitoring for anchor rope and top horizontal displacement were carried out. The working performance of the earth-prestressed anchor rope had been analyzed, which indicated that the load carrying capacity of soil prestressed anchor rope was correlated with interface friction resistance between soil and anchorage body directly and closely related to constructing quality. The failure mode of prestressed anchor rope in the earth was actually caused by a shear force and the interface between the grounding and the earth layer. Monitoring results indicated that the pit was overall stable and pile-anchor system could control deformation of retaing structure effectively.

Keywords:pile-anchor retaining and protecting structure； design； prestressed anchor rope； testing

作者簡介：熊智彪，副教授，Email:xzb1966@126.com。

參考文獻(xiàn)

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