考虑施工过程的土钉支护坑壁水平位移计算  

Calculation of horizontal displacement of soil nailing considering construction process

作　　者：郭红仙[1] 宋二祥[1] 陈肇元[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《岩土工程学报》2010年第S1期69-73,共5页Chinese Journal of Geotechnical Engineering

摘　　要：结合土钉支护边开挖边支护的特点,建立了以开挖影响面及其上土钉力增量为主要研究对象的施工阶段土钉支护分析模型,给出了施工过程中土钉支护坑壁水平位移的计算方法。采用本文计算方法,计算了Clouterre项目1号墙建造过程中的坑壁水平位移,与量测值符合良好;此外,对基坑几何形状、土体性质和土钉布设情况对坑壁水平位移的影响进行了分析,结果表明符合土钉支护坑壁水平位移的变化规律。Based on the construction feature that staged construction completes after each of the excavation stages is finished,it is important to discuss the incremental force of soil nail during the construction.A new phenomenological model for the analysis of soil nailing during the excavation is established.Based on the new model,the methods for the tensile forces of soil nail and the horizontal displacements of the wall facing considering the construction process can be obtained.The measurements of horizontal displacement of wall facing of Experiment 1 of Clouterre Program during the construction are compared with the calculated results by the proposed methods.The analysis of excavation depths,slope angles,soil properties and nail bars shows that the proposed method is available.

关 键 词：土钉支护 施工阶段 坑壁水平位移 土钉力增量 

分 类 号：TU753[建筑科学—建筑技术科学]