隧道洞渣制备机制砂的细度模数控制系统研究与应用
Research and application of fineness modulus control system for preparing crushed sand from tunnel slag
林靖 1任阳 1郑军 1周磊 1高旭东 1姜世霖 1王肖 2汪峥3
作者信息
- 1. 中铁工程服务有限公司,四川 成都 610083
- 2. 川藏铁路技术创新中心有限公司,四川 成都 610213
- 3. 中铁二院工程集团有限责任公司,四川 成都 610083
- 折叠
摘要
隧道洞渣岩石特性多变,成品机制砂细度模数波动大,不利于工程应用.通过理论分析和试验研究等方法,研究了各公称粒径区间占比对细度模数的影响,将 0～5.0 mm砂分为0～2.5 mm与 2.5～5.0 mm两区间,以《建设用砂》细度模数的计算公式为基础,结合实测数据得出细度模数简化预测公式,并基于该预测公式构建了控制逻辑,实现了细度模数的在线调配与闭环控制.研究结果表明:将 0～5.0 mm砂分为 0～2.5 mm与 2.5～5.0 mm两区间,可推导出细度模数的简化预测公式,通过两区间砂的比值即可快速准确预测细度模数;当细度模数在 2.6～2.8之间且调配系数k取 2.1时,m3 与m2 的比值为 3.1～4.8,m3 与v的比值为78.12～120.96.基于简化预测公式构建的细度模数控制系统,可实现细度模数稳定控制,对隧道洞渣资源化利用有积极作用.
Abstract
The characteristics of tunnel slag rock are changeable and the fineness modulus of final crushed sand fluctuates greatly,which is not conducive to engineering application.Through theoretical analysis and experimental research,the influence of the proportion of each nominal particle size interval on the fineness modulus is studied.Divide 0-5.0 mm sand into 0-2.5 mm and 2.5-5.0 mm intervals,based on the calculation formula for fineness modulus of Construction Sand and combined with measured data,a simplified prediction formula for fineness modulus is obtained.Based on the prediction formula,a control logic is constructed to achieve online allocation and closed-loop control of fineness modulus.The research results show that 0-5.0 mm sand is divided into 0-2.5 mm and 2.5-5.0 mm intervals,and a simplified prediction formula for fineness modulus is derived,the fineness modulus can be quickly and accurately predicted by the ratio of sand between 0-2.5 mm and 2.5-5.0 mm intervals;when the fineness modulus is between 2.6 and 2.8 and the blending coefficient is 2.1,the ratio of m3 and m2 is 3.1 to 4.8,and the ratio of m3 and v is 78.12 to 120.96.The fineness modulus control system based on the simplified prediction formula can realize the fineness modulus stability control,and has a positive effect on the resource utilization of tunnel slag.
关键词
隧道洞渣/机制砂/细度模数/闭环控制/简化公式Key words
tunnel slag/crushed sand/fineness modulus/closed-loop control/simplify formula引用本文复制引用
基金项目
成都市产业集群协同创新项目资助(2021-XT00-00002-GX)
出版年
2024
NETL
NSTL
维普
万方数据