摘要
以光纤温度传感器为主、光纤压力传感器为辅,构建应用于透水铺装的光纤监测系统,并通过该系统的监测结果,计算雨水在透水铺装中的渗透速率,从而定量化反映透水铺装的透水能力。选取某地区降雨条件作为试验雨水模拟条件,根据当地暴雨强度公式,对不同重现期、不同降雨历时下的降雨强度计算后进行降雨条件模拟。人工配制雨水,将SS污染物配制浓度调整为50 mg/L,使用透水混凝土作为试验对象并安置于透水铺装中,将配制好的雨水径流通过模拟降雨装置打至透水铺装上,分别在七种不同降雨条件下进行测试,收集透水铺装产生的雨水径流并测得径流中SS浓度。得出以下结论:在低重现期下,海绵设施对雨水径流中的SS污染物削减率较好,此时透水面层渗透速度也较低;随着重现期增加,海绵设施对雨水径流中SS污染物削减率降低的同时,透水面层的渗透速度也在稳定增加。同时也验证了光纤监测系统在监测海绵体对径流污染SS控制方案可行性。
Based on optical fiber temperature sensor and supplemented by optical fiber pressure sensor,an optical fiber monitoring system for permeable pavement was constructed.Through the monitoring results of the system,the penetration rate of rainwater in permeable pavement was calculated,so as to quantitatively reflect the permeability of permeable pavement.The rainfall condition of a certain area was selected as the rainfall simulation condition in the experiment.According to the local rainstorm intensity formula,the rainfall intensity under different return periods and different rainfall duration was calculated,and then the rainfall condition was simulated.Through artificial preparation of rainwater,the concentration of SS pollutant was adjusted to 50 mg/L.Using permeable concrete as the test object and placed in the permeable pavement,the prepared rainwater runoff was hit on the permeable pavement through the simulated rainfall device,and tested under seven different rainfall conditions respectively.The rainwater runoff generated by the permeable pavement was collected and the SS concentration in the runoff was measured.The conclusions are drawn as follows:in the low recurrence period,the sponge facilities can effectively reduce the SS pollutants concentration in the rainwater runoff,and the infiltration speed of permeable surface is also at a low level.With the increase of return period,the reduction rate of SS pollutants in rainwater runoff is decreased by sponge facilities,while the infiltration speed of permeable surface is increased steadily.At the same time,the feasibility of the optical fiber monitoring system in monitoring the cavernous body to control runoff pollution SS is verified.
作者
汪诗超
WANG Shichao(China Railway Construction Group Co.Ltd.,Beijing 100040,China)
出处
《铁道建筑技术》
2021年第6期178-181,共4页
Railway Construction Technology
关键词
径流污染
SS
海绵城市
光纤
监测系统
试验
runoff pollution SS
sponge city
optical fiber
monitoring system
test
