箱式挡土墙技术优化研究-《高速铁路技术》

文章信息/Info

Author(s):: JIANG Lei; China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

Keywords:: box retaining wall|application status|optimization of technology|silo soil pressure|separate structure|prefabrication construction

摘要:: 箱式挡土墙多应用在特殊工点，通常墙体尺寸较大，需进行个别设计。小尺寸的箱式挡土墙受结构及配筋构造的限制，其经济性较差，推广应用有一定的局限性。本文对箱式挡土墙技术的应用和研究现状进行了梳理，并对其土压力计算、构造措施、结构尺寸、施工工艺等几个方面进行了优化研究：采用贮仓土压力理论优化土压力算法；采用箱体与底板分离式构造优化结构受力；采用错排钢筋布置减小结构尺寸；采用预制装配施工提高施工效率。优化后，箱式挡土墙的技术优势显著提高，其壁厚更薄，钢筋用量更省，质量更易控制，施工更快捷、更环保，应用领域也得到了拓宽，小尺寸的箱式挡土墙可设计为薄壁结构，具有较好的经济优势。

Abstract:: Box retaining walls are mostly used in special construction sites. Usually, the walls are large in size and need to be designed individually. Limited by the structure and reinforcement structure, the small-sized box retaining wall has a poor economy and certain limitations in its popularization and application. In this paper, the application and research status of box retaining wall technology is reviewed, and its earth pressure calculation, structural measures, structural dimensions, construction technology, and other aspects are optimized:the earth pressure algorithm is optimized by using the silo earth pressure theory; the structural stress is optimized by using the separated structure of box body and bottom plate; the structural size is reduced by using the staggered arrangement of reinforcing bars; construction efficiency is improved by using prefabricated assembly construction. After optimization, the technical advantages of box retaining walls are significantly improved, with thinner wall thickness, less steel consumption, easier quality control, faster and more environmentally friendly construction, and wider application fields. The small-sized box retaining wall can be designed as a thin-walled structure, which has better economic advantages.