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王啟云¹，張家生¹，陳曉斌¹，李春光²

（1 中南大學(xué)土木工程學(xué)院，長沙 410075；2 湖南高速鐵路職業(yè)技術(shù)學(xué)院，衡陽 421002）

 

[摘要] 某復(fù)雜建筑高邊坡緊鄰深基坑，邊坡采用錨噴支護(hù)結(jié)構(gòu)和毛石擋土墻支護(hù)結(jié)構(gòu)，基坑采用樁錨支護(hù)結(jié)構(gòu)。在基坑開挖過程中，進(jìn)行了變形和錨索軸力監(jiān)測，重點(diǎn)對水平位移、深層土體位移及裂縫進(jìn)行了監(jiān)測。結(jié)果分析表明，樁錨支護(hù)結(jié)構(gòu)能有效控制基坑變形，基坑呈傾覆破壞趨勢，邊坡呈滑動的破壞模式，且滑動面在不斷擴(kuò)展并形成新滑移體。降雨導(dǎo)致坡體易發(fā)生突發(fā)性變形，由降雨產(chǎn)生的邊坡變形占總變形的比例可達(dá)50%以上；在支護(hù)結(jié)構(gòu)全部錨索張拉鎖定后，基坑開挖對坡體的變形影響較小。在邊坡發(fā)生單次大變形后，軟弱結(jié)構(gòu)面以及巖土體的蠕變?nèi)詴纬奢^大坡體的變形。

[關(guān)鍵詞] 樁錨支護(hù)結(jié)構(gòu)；邊坡；穩(wěn)定性；變形監(jiān)測

中圖分類號：TU476文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2012)10-0130-06

 

Wang Qiyun¹, Zhang Jiasheng¹, Chen Xiaobing¹, Li Chunguang²

(1 School of Civil Engineering and Architecture, Central South University, Changsha 410075, China；2 Hunan Technical College of Railway High-speed, Hengyang 421002, China)

Abstract: Anchor-plate retaining structure and rubble retaining wall are applied as the bracing system of a complicated building slope which fringed a deep foundation pit, and pile-anchor system was adopted as the retaining structure for the foundation pit. During excavation, horizontal displacement, deformation of deep soil and cracks were monitored. The results indicate that the pile-anchor system can control the deformation effectively. The foundation pit is incline to overturn in the process of excavation, further, the breakage mode of the slope is slip and the slip surface is continuously expand to new sliding mass. Incidental deformation occures by rainfall and proves to be more than 50% of accumulative total displacement of slope.The deformation is discovered fluctuating to increase or decrease on the small side in the process of excavation after all the anchor ropes are locked. Once the slope has lager deformation, the latter creep of weak plane and rock-soil will induce more macroscopical displacement.

Keywords: pile-anchor retaining and protecting structure; slope; stability; deformation monitoring

作者簡介：王啟云，博士研究生，Email:wangqiyun860519@163.com。

 

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