重力式挡土墙和加筋土挡土墙设计.docx

摘要
边坡的设计和防护是路基建设一项重要的环节，然而，由于各种因素的影响，路基边坡很容易发生坍塌等破坏现象，从而影响路基的整体稳定性。所以路基边坡稳定性分析便尤为重要了。因路基土质而异，边坡破坏形成的滑动面有直线、曲线多种形式，因此边坡稳定性分析的方法也有直线破裂面法和圆弧破裂面法等方法。与此同时，为了增强边坡稳定性，也可以设立诸如挡土墙此类支挡结构。挡土墙的结构形式多种多样，有重力式挡土墙、悬臂式挡土墙、扶壁式挡土墙、锚杆式挡土墙以及加筋土挡土墙。
本设计分别对重力式挡土墙和加筋土挡土墙进行设计。重力式挡土墙比较基础，设计过程也最为简单，先是基本尺寸数据的拟定，然后计算墙背土压力的大小，最后检算挡土墙的整体稳定性，从而获得最终的设计结构。相比较而言，加筋土挡土墙的设计就复杂的多，比如墙面板的设计，拉筋的设计，墙后填土的选择等等，这些都是重力式挡土墙所没有的。与此同时，加筋土挡土墙不仅需要检算全墙整体稳定性，还需要加筋土进行抗拔稳定性检算，最终才能够获得设计结果。
关键字：挡土墙，稳定分析，土压力
Abstract
Slope design and protection is an important link of roadbed construction, however, due to the influence of various factors, damage phenomenon such as subgrade slope is easy to collapse, thus affecting the overall stability of subgrade slope stability analysis is particularly between subgrade soil, slope sliding surface have a straight line, curve formed by a variety of forms, so the slope stability analysis method of linear fracture surface method and circular failure surface method and other the same time, in order to enhance the slope stability, can also set up a retaining wall structure form is varied, with gravity retaining wall, cantilever retaining wall, buttressed retaining wall, the anchor rod retaining wall and reinforced soil retaining wall.
This design of gravity retaining wall and reinforced soil retaining wall retaining wall is a foundation, the design process is also the most simple, first the basic dimension of the proposed data, then the size of the earth pressure calculation of back, finally calculate the overall stability of the retaining wall, in order to gain the final comparison, the design of the reinforced soil retaining wall is more complex, such as wall panel design, the design of brace, wall after the selection of filled soil, etc., all of these are done not have gravity retaining the same time, the reinforced soil retaining wall needs not only the whole wall is checked up by the ove