生活垃圾焚烧底渣作桥台背回填材料应用研究
Research on the Application of Waste Incineration Bottom Slag as Backfill Material for Bridge Abutments
冯斌 1徐滨 1罗小文2
作者信息
- 1. 绍兴职业技术学院 建筑与设计艺术学院,浙江 绍兴 312000
- 2. 江西省地质局第五地质大队,江西 新余 338000
- 折叠
摘要
生活垃圾焚烧底渣主要成分为熔渣、陶瓷和金属物等,与天然砂砾性质相似.本文采用超重力离心模型试验分析了底渣与砂对桥台背的土压力和沉降特性.结果表明:底渣对桥台背产生的土压力,随相对密度增加而降低,相对密度0.8时是1.0时的1.3倍左右,但小于砂对桥台背产生的土压力.相对密度0.8、0.9和1.0的底渣对桥台背的土压力,均比静止土压力小.底渣的沉降变形明显小于砂,相对密度越小,两者差值越大.底渣的颗粒粒径大于砂,干重度小于砂,相同条件下内摩擦角均比砂大,因此沉降变形和对桥台背的土压力均小于砂,是良好的桥台背回填材料.
Abstract
The main components of municipal solid waste incineration bottom ash are slag,ceramics,and metal mate-rials,which are similar to natural sand and gravel.A centrifuge model test under supergravity conditions was used to ana-lyze the soil pressure and settlement characteristics of bottom ash and sand on bridge abutments.The findings indicate that the earth pressure exerted by the bottom slag on the rear side of the bridge abutment decreases with an increase in relative density.At a relative density of 0.8,it is approximately 1.3 times greater than that at a relative density of 1.0 but still lower than the earth pressure exerted by the sand supporting the bridge abutment.Moreover,the settlement deforma-tions in the bottom slag are significantly smaller than those in the sand,with the difference becoming more pronounced as relative density decreases.Bottom slag has larger particle sizes,lower dry weight,and a higher internal friction angle compared to sand under similar conditions.Consequently,the settlement deformations and earth pressure on the rear side of the bridge abutment are smaller for bottom slag,which is a good backfill material for the back of bridge abutment.
关键词
焚烧底渣/砂/离心模型试验/土压力/沉降Key words
incineration bottom slag/sand/centrifugal modelling tests/earth pressure/settlement引用本文复制引用
出版年
2024
NETL
NSTL
万方数据