砖石古塔纠偏中的掏土孔参数研究  

Research on the Parameters of Digging Hole to Masonry Pagoda Rectification

作　　者：赵冬[1] 芦苇[2] 王玉兰[2] 

机构地区：[1]西安建筑科技大学理学院,西安710054 [2]西安建筑科技大学土木工程学院,西安710054

出　　处：《科学技术与工程》2015年第8期222-227,共6页Science Technology and Engineering

摘　　要：结合某砖石古塔纠偏工程,对掏土纠偏过程中孔深、孔径、孔间距等关键因素的作用机理进行数值模拟分析,主要结论如下。(1)孔深决定地基削弱层的面积范围。掏土孔深度宜略微超过塔体重心投影位置;(2)孔径大小对纠偏的速率控制有关键影响;孔间净距的改变对地基土体的削弱影响较大,对掏土层的有效截面大小有控制作用。孔径与孔间净距应综合考虑。过大的孔径与过密的成孔都是不必要的。(3)孔间塑性区部分重叠能够加快土体内力重分布,加剧塑性变形。With a masonry pagoda project,carried out numerical simulation analysis of mechanism to the key factors were carried out,it include the depth,diameter,distance of the hole,main conclusion is as follows.（ 1） The hole depth decided the area of the weaken layer. The hole depth should be slightly exceed the projection of tower gravity center.（ 2） the hole diameter has the key effect to control the rectification rate. The change of hole distance could influence weaken foundation,the distance also has a great influence to effective section. The parameter of diameter and distance should be take comprehensive consideration. It is unnecessary to use too large hole diameter and put the adjacent hole too close.（ 3） The plastic zone between adjacent holes can accelerate the stress of soil redistribute,aggravated plastic deformation.

关 键 词：砖石古塔 数值模拟 掏土纠偏 过程控制 

分 类 号：TU746.3[建筑科学—建筑技术科学]