临近建筑物有限宽度土体深基坑支护设计与施工  

Design and Construction of Retaining Structures for Deep Foundation Pit to Protect Limited Width Soil

作　　者：张怀文[1] 吉晓朋[1] 车东[1] 

机构地区：[1]中航勘察设计研究院,北京100098

出　　处：《岩土工程技术》2008年第6期312-315,323,共5页Geotechnical Engineering Technique

摘　　要：基于朗肯土压力理论假设和极限平衡理论,将有限宽度土体折算成等效容重的半无限大土体,使二者水平向土压力一致,利用支护软件进行了神华大厦有限宽度土体基坑工程的设计,并在设计中应用了大角度锚杆及局部双排桩。经变形监测,基坑支护结构变形指标均达到设计要求,支护效果良好。类似条件下的支护工程可以借鉴。On the basis of the assumptions of Rankine＇s earth pressure theory and the Limit Equilibrium theory, the limited width soil is translated into the semi-space soil, so that their horizontal earth pressures are fitted to each other. Then, as an example, a deep foundation pit to protect the limited width soil is designed and constructed according to the software of pit-retaining. In addition, large-angle anchors and double-row piles at certain place are applied in this design. As a result, the monitored horizontal displacements are all within the standard limit of design, therefore it can be a reference for similar projects.

关 键 词：深基坑 基坑支护 极限平衡 双排桩 大角度锚杆 

分 类 号：TU413.6[建筑科学—岩土工程]