复合型土钉墙在软弱地层基坑应用中的关键技术研究  

Key Technique Reaserch on Compound Soil Nailing Applied in Foundation Excavation in Soft Soil Layer

作　　者：何斌 

机构地区：[1]南京地下铁道工程建设指挥部,江苏南京210008

出　　处：《现代交通技术》2010年第3期97-100,共4页Modern Transportation Technology

摘　　要：针对软弱的淤泥质土层、粉砂性土层采用土钉墙支护存在地下渗水、基坑降水和边坡稳定难以保证的难题,在南京地铁奥体中心站施工中采用由超前支护、土钉、土体、喷射混凝土面层组成复合型土钉支护结构,配合坑外止水帷幕、坑内降水等辅助工法,既实现了土钉墙的功能,又解决了土体的隔水性、自立性,取得一定的工程经验和良好的经济效果。Aiming at the difficult problems of groundwater seeping, foundation pit dewatering and side slope instability existing in soft soil layer supported by soil nailing,the paper puts forward compound soil nailing support structure composed of advance support, soil nail, soil body and jetting concrete surface, and cooperating with the assistant methods such as pit outside waterproof curtain,pit inside precipitation,the fuction of soil nailing wall is realized,the water- separating and serf-supporting is solved. The construction method was successfully applied with certain project experience and fine economic results.

关 键 词：基坑 软弱土层 复合型土钉墙 止水帷幕 支护 

分 类 号：TU472.3[建筑科学—结构工程] U239.5[建筑科学—土工工程]