南师附中树人学校段江堤渗流监测成果分析

Analysis on the monitoring results of river levee in High School Affiliated to Nanjing Normal University Shuren Campus section

2017年上半年,南师附中树人学校段长江大堤进行了两道高压旋喷垂直防渗墙防渗和充填灌浆加固。为了解防渗墙截渗效果,工程完工后,选择5个渗流监测断面,即在各监测断面防渗墙外侧1.2 m,高程6.0 m处埋设了一组渗压计并开展渗流监测。本次分析数据采集时间段主要为2017年主汛期,将采集到的测点水位数据生成图表并进行对比分析,分析结果表明,防渗墙迎水侧各测点随长江水位变化而变化,防渗墙背水侧各测点受长江水位影响较小,防渗墙起到了防渗作用。

In the first half of 2017, the seepage control of two high pressure rotary jet vertical cutoff walls and reinforcement of filling grouting were carried out on the river levee in High School Affiliated to Nanjing Normal University Shuren Campus section. In order to understand the seepage control effect of cutoff walls, five seepage monitoring sections were selected after the project was completed, that was a series of seepage pressure gauges and monitoring of seepage were installed at a depth of 1.2 m outside the cutoff wall of each monitoring section and an elevation of 6.0 m. The analysis data were mainly collected from the main flood season in 2017, and the collected water level data of the measuring points would be generated into chart and compared. The results showed that the measurement points facing the water side of the cutoff wall changed with the water level of Yangtze River, and the measuring points on the backwater side of the cutoff wall were less affected by the water level of the Yangtze River, and the cutoff wall played an anti-seepage role.