为有效溶解隧道排水盲管中的碳酸钙结晶，并对排水管道结晶清洗效果的关键因素进行探讨，选用一种复合型环保清洗剂，在实验室环境下进行3种不同的结晶溶解试验： 初始饱和清洗剂溶液溶解试验、持续饱和清洗剂溶液溶解试验和初始饱和清洗剂溶液循环冲刷试验。室内试验结果表明： 初始饱和清洗剂溶液通常在反应初期的溶解效率最高，当溶液pH值上升为4时，溶解速度开始降低；持续饱和清洗剂溶液对碳酸钙的溶解效果最好，每100 mL的持续饱和清洗剂溶液对钟乳石的溶解速度约为0.7 g/h。结合工程案例的应用结果，表明采用高压清洗加循环清洗的工艺，能取得较为理想的管道结晶清洗效果。

To effectively dissolve the calcium carbonate crystal in the tunnel drainage blind pipe, and to explore the key factors of the cleaning effect of the drainage pipe crystal, a composite environmental protection cleaning agent is selected and studied. Three different crystal dissolution experiments are conducted in the laboratory environment including the initial saturated cleaning agent solution dissolution test, continuous saturated detergent solution dissolution test, and initial saturated detergent solution circulation dissolution test. The laboratory experimental results show the following: (1) The dissolution efficiency of the detergent solution is the highest at the initial stage of the reaction. When the pH value of the solution rises to 4, the dissolution rate begins to decrease. (2) The dissolution rate of stalactite is about 0.7 g/h per 100 mL of continuous saturated detergent solution. The agent is applied to an engineering case, and the applicable results show that the high pressure cleaning and circulation cleaning process can achieve ideal cleaning effect.