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（太原市建筑安全監(jiān)督管理站， 太原 030009）
［摘要］介紹了護坡樁+預(yù)應(yīng)力錨桿支護體系及三軸水泥土攪拌樁在山西太原汾河階地敏感地層中的應(yīng)用。通過提高單根錨桿極限承載力減少錨桿道數(shù)，進而減小錨桿成孔造成的地層損失；采用液壓雙動力雙套管施工工藝，有效保護孔壁，降低孔壁受沖刷的程度進而減小地層附加沉降；同時采取多重堵漏措施，確保高水位環(huán)境下帷幕體系的有效性；通過監(jiān)測及時指導(dǎo)施工，動態(tài)調(diào)整施工參數(shù)，使敏感建筑物變形始終位于安全變形范圍之內(nèi)。結(jié)果證明此種基坑支護技術(shù)在靈敏地層中應(yīng)用的可行性和有效性。
［關(guān)鍵詞］汾河階地； 預(yù)應(yīng)力錨桿； 三軸水泥土攪拌樁； 攪拌樁； 靈敏性土
中圖分類號： TU44 文獻標識碼： A文章編號： 1002-848X(2016)S1-0765-05
Application of foundation pit support anchor in sensitive environment
of the Fenhe river terraces of Taiyuan
Xu Xianwu
(Construction Safety Supervision and Management Station of Taiyuan， Taiyuan 030009, China)
Abstract: The pit support method with pile, prestressed anchor and three-shaft stirring pile used in sensitive soil of the Fenhe river terraces in Taiyuan, Shanxi province was introduced. The number of anchor rows was reduced by improving the ultimate capacity of single anchor to avoid soil loss, and the hydraulic dural-pipe machine was used to protect the borehole and avoid ground settlement. Meanwhile, multi plugging technologies were taken to ensure the effectiveness of curtain wall. The construction parameters were dynamically adjusted according to monitoring results, to ensure the settlement of sensitive buildings within the safety margin. The application of this method turns out to be feasible and effective.
Keywords: Fenhe river terraces; prestressed anchor; three-shaft stirring pile; stirring pile; sensitive soil
作者簡介： 徐憲武，碩士，高級工程師，副總工程師，Email:13934228600@139.com。
