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| 土钉墙变形规律及其相关性的实测研究 | |
| 引用本文： | 魏焕卫,杨敏,孙剑平,陈启辉.土钉墙变形规律及其相关性的实测研究[J].岩土力学,2009,30(6):1753-1758. |
| 作者姓名： | 魏焕卫 杨敏 孙剑平 陈启辉 |
| 作者单位： | 1. 同济大学,地下建筑与工程系,上海,200092;山东建筑大学,工程鉴定加固研究所,济南,250014 2. 同济大学,地下建筑与工程系,上海,200092 3. 山东建筑大学,工程鉴定加固研究所,济南,250014 |
| 基金项目： | 建设部科技攻关计划，山东省科技攻关计划 |
| 摘 要： | 根据基坑坡顶水平位移与沉降的实测数据，讨论了土钉墙坡顶水平位移和沉降以及水平位移与沉降之比的规律，并利用统计方法对其相关性进行了分析，根据实际施工工况与实测数据对比，指出影响土钉墙变形的关键因素及控制土钉墙变形的有效措施。实测数据分析结果表明：基坑坡顶变形的空间效应明显；采用放坡或坡顶卸载可以有效地控制土钉墙的变形；在基坑上部设置预应力锚杆对基坑变形控制具有明显的效果；基坑坡顶的沉降随其水平位移呈非线性增加，沉降与水平位移比与其水平位移基本呈线性增加；土钉基坑发生破坏时的坡顶水平位移的警戒值为0.8 %～1.0 %H。 |
| 关 键 词： | 土钉墙 水平位移 沉降 实测数据 相关性 |
| 收稿时间： | 2008-07-14 |
Deformation law and correlation of soil nailing wall based on measured data |
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| WEI Huan-wei,YANG Min,SUN Jian-ping,CHEN Qi-hui.Deformation law and correlation of soil nailing wall based on measured data[J].Rock and Soil Mechanics,2009,30(6):1753-1758. | |
| Authors: | WEI Huan-wei YANG Min SUN Jian-ping CHEN Qi-hui |
| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Institute of Appraisal and Strengthening, Shandong Jianzhu University, Ji’nan 250014, China |
| Abstract: | Based on the measured data of soil nailing wall, the ratio of lateral displacement to vertical displacement is discussed. The correlation between lateral and vertical displacements is developed by using statistical method. Some key factors about deformation of soil nailing wall and the effective way to control the deformation of soil nailing wall strictly are pointed out. The analysis shows that space effect on deformation of soil nailing wall is obvious; excavating slope and slope top unloading can control the deformation of soil nailing wall effectively; prestressed anchor on the upper of foundation pit can largely restrain the foundation pit deformation; the increment of vertical displacement of slope top is nonlinear with that of its lateral displacement; the increment of the ratio of vertical displacement to lateral displacement is linear with that of its lateral displacement, the alarm value of lateral displacement on the upper of soil nailing foundation pit is 0.8-1.0 percent of the excavation depth when slope instability happens |
| Keywords: | soil nailing wall lateral displacement vertical displacement measured data correlation |
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