摘要
根据复合土钉支护位移产生的原理提出了一种计算复合土钉支护位移的方法。为表述复合土钉支护增量应力释放引起增量位移的变形原理,文中引入了一种释放力。该力作用在土钉面层上,引起了土钉支护的变形。假定土钉支护的增量位移由三部分组成:即释放力引起的开挖面变形、当前开挖面变形对上层开挖面和下层开挖面的附加位移。通过简单的理论推导,文中得出一计算复合土钉支护位移的公式。同时计算了两个成层土层中的复合土钉支护位移,计算结果与实测数据比较吻合。
A method to calculate the displacement of cutting face of composite soil nailed walls was introduced. The method was based on the conception that incremental relief of in-situ stress generated incremental displacement on the cutting face. A release force was employed to realize the idea. Some displacement was accumulated on the cutting face when the release force was exerted. The total displacement was composed of 3 kind of sub-displacements： diselacement by release force, additional displacement of upper cutting face by the movement of the current step and additional displacement of lower cutting face by the movement of the current excavating step. A simple formula was set up with simple theory to calculate the total displacement of the cutting face. Two practical composite soil nailed walls located in layered soil were calculated with the present method, The results were close to the measured displacement.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2007年第5期755-759,共5页
Chinese Journal of Geotechnical Engineering
关键词
复合土钉支护
开挖面位移
变形机理
位移模式
composite soil nailed wall
displacement on cutting face
deformation mechanism
displacement mode
