大倒坡折线型挡土墙计算方法探讨  

The Design Method Discussion of the Retaining Walls with Large Inverse Gradient Broken Back

作　　者：于清泉[1] 薛国亚[1] 龚维明[1] 

机构地区：[1]东南大学土木工程学院,南京210096

出　　处：《特种结构》2008年第1期48-51,共4页Special Structures

摘　　要：大倒坡折线型挡土墙是一种受力比较复杂的重力式挡土墙。针对这种特殊形式的挡土墙,文章结合某大学新校区防洪渠的边坡防护的优化设计,讨论了作用在墙上土压力计算的多种方法,提出以库仑理论计算折点以上墙背的主动土压力,以特征圆法计算折点以下墙背的主动土压力。并针对墙身下半部分倾斜度较大的特点,对一般挡土墙验算方法进行了修改。最后证明了该方法安全合理,指出大倒坡折线型挡土墙减少了施工过程中开挖和回填工程,降低了工程造价,缩短了工期。The retaining wall with large inverse gradient broken back is one of the more complicated mechanics character gravity ones. Then aiming at these especial formal retaining walls, the manifold theories of calculating active earth pressure on the especial shape walls are discussed in this paper through the optimize design of slope protection of the channel preventing flood surrounding some university new campus. Basing these theories, a new method is brought forward, which is by means of calculating the active earth pressure of the upper part of the walls with the theory of Coulomb and calculating the one of the lower part of the walls with theory of C. C. Голущкевцч＇ s characteristic circle of limit balance principle. Moreover, the method of checking computation for the general retaining walls is modified aiming at the character with large gradient of the lower part of the walls. Furthermore, it has been used in practice project. Obviously, the security and rationality are proved by the practice. Besides, the walls reduced excavation and back filling, at last profit cost and the time limit are got for the project.

关 键 词：主动土压力 挡土墙 折线 平衡 

分 类 号：TU476.4[建筑科学—结构工程] TV223[建筑科学—土工工程]