One of the challenges faced in maintaining the aging sewer systems is the infiltration, which is caused by the deterioration of the sewer systems. In this study, A table top lateral joint model was used to investigate grout movement through soil, when sealing sewer pipe leaks at lateral joints by grouting. Acrylamide chemical grout was injected through a leaking lateral joint into a coarse sand (d_(10)=0.5 mm), using 3 psi (21 kPa). The volume of infiltration was measured before and after grouting to determine the effectiveness of grouting. The volume infiltration was measured at 1 min, 1 hr and 24 hrs. after grouting using an external water pressure up to 3 psi (21 kPa). At the end of the test, the shape of the grout bulb around the joint was mapped. A mathematical model was developed to determine the shape of the grouted region around the lateral joint, and verified with the experimental data. The amount of grout used to control the leak around the joint was compared to the recommendation of ASTM F 2304.
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机译：在维持老化下水道系统方面面临的挑战之一是渗透，这是由下水道系统的劣化引起的。在这项研究中，桌面横向接头模型用于通过灌浆在侧向接头处泄漏下水道管道时通过土壤来研究灌浆运动。使用3 psi（21kPa），通过将丙烯酰胺化学灌浆喷射到粗砂（D_（10）= 0.5mm）中注入粗砂（D_（10）= 0.5mm）。在灌浆之前和之后测量渗透量以确定灌浆的有效性。在1分钟，1小时和24小时测量体积渗透。使用外部水压灌浆，高达3 psi（21kPa）。在测试结束时，接头周围的灌浆灯泡的形状被映射。开发了数学模型以确定横向关节周围的灌浆区域的形状，并用实验数据验证。与ASTM F 2304的推荐相比，用于控制关节周围泄漏的灌浆量。
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