新型速凝类浆液注浆对地下水水质影响分析评价

Impact Analysis of the New Quick-Setting Grouts on Groundwater Quality

注浆是处理地下灾害的有效手段,在施工过程中势必造成地下水环境中水质的变化。为了研究新型速凝类浆液注浆对地下水水质的影响,文章以南京地铁上元门车站工程为背景,在车站基坑内外合理选取8个地下水水质监测点,采用综合评价法计算现场采集的水样数据。结果表明,施工前上元门车站基坑内外地下水水质良好,施工过程中注浆范围附近多个水质因子受到了不同程度的较大影响,注浆范围外水质因子受到的影响甚微,从而验证了新型速凝类注浆材料在有地下水保护要求的地下工程注浆中的适用性。

Grouting is an effective means to deal with geological disasters, but it may aftect groundwater quality during construction. Using the Shangyuanmen station in Nanjing Metro as an example, this paper examines the influ- ence of the new quick-setting grouts on groundwater quality by selecting eight monitoring points inside and outside the foundation pit and analyzing the sample data with a comprehensive evaluation method. The results show that the water quality factors near the grouting area are greatly influenced, while those outside the grouting area are slightly influenced, indicating that new quick-setting grout is applicable to underground works for which groundwater pro- tection is requested.