摘要
为了解决岩溶地区隧道工程普遍存在的岩溶结晶阻塞排水系统问题。依托玉石高速公路长塘隧道,现场采集溶岩隧道排水管内岩溶结晶物和水样,采用可见光分度计、化学分析试验测得岩溶结晶物及水样的化学组分,开展岩溶隧道排水管道结垢过程室内模型试验,研究岩溶结晶物形成的机理,分析不同流速、不同CO_(2)分压对于排水管道结垢的影响,最后围绕岩溶结晶物的形成机理,研究制备岩溶结晶物的清洗剂及其效果验证。结果表明:岩溶隧道排水流速增大、CO_(2)分压减小,排水管产生的结晶堵塞物增多,流速从0.5 L/s增大到0.8 L/s,结垢量增加17.29%,CO_(2)分压从4.5 bar减小到3 bar,结垢量增加16.89%;采用浓度为0.3%的甲酸试剂作为溶解清洗溶剂来清洗碳酸盐阻塞物。本研究可为隧道排水管结晶堵塞病害的防治提供理论参考。
To solve the common problem of karst crystals blocking the drainage system in tunnel projects in karst areas.In this paper,relying on the Changtang Tunnel of Gongyushi Expressway,the karst crystals and water samples in the drainage pipe of the karst tunnel were collected on-site,and the chemical components of the karst crystals and water samples were measured by the visible light spectrometer and chemical analysis test.Model experiments of karst tunnel fouling and drainage pipes were carried out to study the formation mechanism of karst crystals,analyze the influence of different flow rates and different CO_(2)partial pressures on the scaling of drainage pipelines,finally,based on the formation mechanism of karst crystals,cleaning agents for karst crystals were prepared,and verify its effect.The results show:with the karst tunnel drainage flow rate increases,the CO_(2)partial pressure decreases,the crystalline blockage generated in the drainage pipe increases,the flow rate increases from 0.5 L/s to 0.8 L/s,the scaling amount increases by 17.29%,when the CO_(2)partial pressure 4.5 bar was reduced to 3 bar,the scaling amount increased by 16.89%;the formic acid reagent with a concentration of 0.3%was used as the dissolving and cleaning solvent to dissolve and clean the carbonate blockage.This study can provide a theoretical reference for the prevention and treatment of crystallization blockage of tunnel drainage pipes.
作者
杨树坡
党悦
王晋
王欢欢
杨蕴
YANG Shupo;DANG Yue;WANG Jin;WANG Huanhuan;YANG Yun(Guizhou Zhongjiao Yushi Expressway Development Co.,Ltd.,Tongren,Guizhou 554300,China;School of Earth Sciences and Engineering,Hohai University,Nanjing,Jiangsu 211106,China)
出处
《公路工程》
2023年第4期16-22,共7页
Highway Engineering
基金
国家重点研发计划项目(2019YFC1804300)。
关键词
岩溶隧道
岩溶结晶物
堵塞机理
清洗溶剂
karst tunnel
karst crystallization
clogging mechanism
cleaning solvent
