泡沫混凝土回填施工技术实施要点探析

2020-10-21 03:50:24毛庭
科技创新与应用 2020年30期

毛庭

摘  要:在老路拓宽改造工程实施过程中,挡土墙墙背回填采用泡沫混凝土回填施工,能够很好地改善新旧路基的工后沉降差,同时解决了挡土墙墙背边角部位填土不易压实的质量问题。它重量轻,降低了对基底的竖向荷载;强度高,减少了对墙体的侧向压力;施工工期短,采用机械化生产工效高;与结构物结合紧密,整体性好。项目部本着“文明施工,安全第一”的原则来组织项目施工,并加强质量控制,注重环保措施的落实,在施工的同时注意环境保护与生态修复,为其他项目的施工提供了可供操作的经验。

关键词:泡沫混凝土;回填施工;技术要点

中图分类号:U418         文献标志码:A         文章编号:2095-2945(2020)30-0151-02

Abstract: In the course of the implementation of the old road widening and reconstruction project, the foam concrete backfilling construction on the back of the retaining wall can well improve the post-construction settlement difference between the new and old roadbed, and at the same time solve the quality problem that the filling at the back corner of the retaining wall is not easy to be compacted. The utility model has the advantages of light weight, reducing the vertical load on the base, high strength, reducing the lateral pressure on the wall, short construction period, high efficiency of mechanized production, close combination with the structure and good integrity. In line with the principle of "civilized construction, safety first", the project department organizes the project construction, strengthens quality control, pays attention to the implementation of environmental protection measures, and pays attention to environmental protection and ecological restoration at the same time of construction, which provides operational experience for the construction of other projects.

Keywords: foam concrete; backfilling construction; technical key points

1 概述

泡沫混凝土由于自身的優点及环保的特性使它在公路工程施工中的应用场景越来越广泛,如桥梁台背回填、挡土墙墙背回填、旧路改造的桥台背路基换填等等。使用泡沫混凝土回填能够很好地改善新旧路基的工后沉降差,能够解决挡土墙墙背边角部位填土不易压实的质量问题。它重量轻,降低了对基底的竖向荷载;强度高,减少了对墙体的侧向压力、施工工期短,采用机械化生产工效高;与结构物结合紧密,整体性好。以229省道兴化段改扩建工程中的应用为例,该方案主要依据《现浇泡沫轻质土技术规范》(CECS 249:2008)、《气泡混合轻质土填筑工程技术规范》(CJJ/T 177-2012)与设计文件来制定,同时项目部人员本着“文明施工,安全第一”的原则来组织项目施工,为其他项目的施工提供了可供操作的经验。……

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