轻质材料在公路桥涵台背回填中的应用

Application of lightweight materials in backfill of abutment back

由于地基沉降、填料压缩变形、排水条件、施工不重视等的影响,导致公路桥涵台背回填处易发生不均匀沉降,形成桥头跳车影响公路的正常运营。轻质材料由于压缩模量高、重量低的特点,可减小地基及其本体的变形,是有效解决这一问题的方法之一。本文对土工泡沫EPS、气泡混合轻质土、无砂大空隙混凝土及粉煤灰类轻型材料等的研究情况、工作原理、主要性能、应用情况进行综述,为该类工程的设计、施工提供参考。

Uneven deformation of roadbed caused by foundation settlement, compressive deformation of fill- ing, drainage condition, construction and so on. Affect the normal running of highway. Lightweight materials due to the characteristics of high compression modulus and low density, can reduce the deformation of foundation and its ontology. The application of lightweight materials is one of the methods to solve this problem. This paper introduces the research situation, common principle, main performance, Application, provide reference for the design and construction of the project.