沙障立柱受力分析及埋深计算  

Stress on Sand Barrier's Pillar a nd the Calculation of Pillar's Depth

作　　者：蒋富强[1] 邸耀全[1] 张红利[1] 

机构地区：[1]铁道部科学研究院西北分院

出　　处：《中国沙漠》1999年第2期187-190,共4页Journal of Desert Research

摘　　要：对阻沙工程中普遍应用的立式沙障立柱受力及其埋深进行了分析与计算，使阻沙工程措施的立式沙障埋深由过去的经验确定转为计算确定，避免了盲目性；确定立式沙障有效高度１ｍ，在复合沙障阻固结合防沙工程中，是一种集阻沙和导沙于一体的很有价值的防沙工程。计算对于确定立式沙障的结构、材料用量，提高工程的稳定性方面具有重要的参考价值。Vertical sand barrier is a kind of valuable sand preventing engineering that com bines blocking and conducting sands. When sand barrier plays its function, it wa s pressed greatly by wind. It is neccessory to analyze the stress on sand barrie r for determining effective structure coefficients. The paper referred the bridg e design experience for wind speed sampling as well as wind force transformed f rom wind velocity when analyzed the pillars stress. Sand barriers pattern, t he height of wind force, terrain and geography factors etc. are considered for c alculation according with the actual condition. Wind pressure was passed to pill ars through crossing branch and main bone of the verticle sand barrier. Stresses on pillar include gravitation, wind force, active earth pressure and passive ea rth pressure. Pillars gravitation is neglective by being considered as light t imber. Pill ars diameter is usually 5￣10 cm, which can not be cut by wind force. So the st rength of pillar itself is not considered. The calculation of stress that sand barriers pillar bear follows the steps:Firstly, the wind force strength was ca lculated with relative formula between it and wind speed. Secondly, wind load s trength on sand barrier was obtained by the wind force strength multipling co efficients of barriers pattern, wind force height, terrain and geography facto rs. Lastly, wind load strength multiplied by sand barriers area and porosity i s the stress. When calculating the pillars embedded depth the paper referred the method of calculating rigid pillar popularily used at present. The load acted on barrier from over sand surface was transformed into the outer load at sand surf ace according to mechanics, and sand body was regarded as homogeneous elastic bo dy to calculate lateral stress on pi

关 键 词：立式 沙障 受力计算 埋深计算 铁路 沙害防治 

分 类 号：U216.413[交通运输工程—道路与铁道工程]