北京地区水工挡土墙的抗冻胀计算及实例分析

Calculation and analysis on the anti-frost-heave of hydraulic retaining wall in Beijing areas

挡土墙是水利水电工程中不可缺少的重要建筑物,其是否稳定会影响整个水利工程的安全。在以往的水工挡土墙设计过程中,设计人员往往凭经验处理冻胀问题。北京地区地处三级冻胀区域,冬冻春融变化明显,要做到水工建筑物的安全可靠、经济合理,对其进行抗冻胀计算就显得尤为重要。在阐述水工挡土墙冻胀原理及其冻害的基础上,提出了抗冻胀计算的步骤、布置原则及应采取的措施,并通过实例分析了冻胀的产生及其稳定计算过程。

Hydraulic retaining wall is an important structure for the water resources and hydroelectric projects and its stability will influence the safety of whole engineering. In the past, the design of antifrost-heave of hydraulic retaining wall was usually dealt by experiences. Beijing is located in the areas of third grade, which is frozen in winter and thawed in spring, and the calculation of anti-frost-heave is rather important to ensure the safety and economy. Based on descriptions of the principle and the damage of frost heave, the calculating steps, disposing principles and the protecting measures of anti-frostheave of hydraulic retaining wall were put forward through a case study.