巖溶地區(qū)地下水滲流結晶堵塞隧道排水管機理研究及處治建議
發(fā)布時間：2018-09-08 07:02
【摘要】：本文針對運營巖溶隧道排水系統(tǒng)由于地下水滲流運動在隧道排水管內生成的沉淀結晶物與泥沙和圍巖顆粒及圍巖碎片等共同作用而堵塞失效的問題進行了相關研究。在分析總結前人研究成果的基礎上,結合模型試驗,對影響隧道排水系統(tǒng)堵塞的因素進行了相關分析研究,主要的研究工作如下:1.對依托工程隧道進行現(xiàn)場調研,分析了隧道排水管內堵塞物的化學成分,同時分析了排水管內的水溶液樣品的離子種類及濃度。分析了造成隧道排水系統(tǒng)堵塞的原因,并闡述了影響隧道排水管內沉淀結晶物生成的作用因素。2.利用經驗公式以及DBL理論公式計算了隧道排水管內沉淀結晶物的理論結晶速率,得出DBL理論公式比較適合計算巖溶隧道排水管內沉淀結晶物的結晶速率。3.采用模型試驗對不同縱向排水管坡度及流量流速作用下排水管內沉淀結晶物生成的規(guī)律進行觀察,通過對比以15天為試驗周期,排水管及彎頭的質量變化來判斷縱向排水管坡度及流量流速這兩個因素對排水管內沉淀結晶物生成的具體作用。4.在對巖溶隧道排水管堵塞原因分析的基礎上,提出在隧道排水系統(tǒng)中局部采用波紋縱向排水管、在隧道排水管內加入CA(碳酸酐酶)及在隧道排水管內及時放入高效阻垢劑等措施可以有效抑制排水管內沉淀結晶物的生成,進而延緩隧道排水管的堵塞進程。
[Abstract]:In this paper, the clogging failure of karst tunnel drainage system due to the joint action of sediment, surrounding rock particles and surrounding rock debris caused by groundwater seepage movement in tunnel drainage pipe is studied in this paper. On the basis of analyzing and summarizing the previous research results and combining with the model test, the factors affecting the blockage of the tunnel drainage system are analyzed and studied. The main research work is as follows: 1. Based on the field investigation of the tunnel, the chemical composition of the blockage in the drainage pipe of the tunnel was analyzed, and the ion species and concentration of the aqueous solution in the drainage pipe were analyzed at the same time. The causes of tunnel drainage system blockage are analyzed, and the factors affecting the formation of precipitated crystals in tunnel drainage pipes are expounded. The theoretical crystallization rate of precipitated crystals in tunnel drainage pipes is calculated by using empirical formula and DBL formula. It is concluded that the theoretical formula of DBL is more suitable for calculating the crystallization rate of precipitated crystals in karst tunnel drainage pipes. Model test was used to observe the formation of precipitated crystals in drains under the action of slope and flow velocity of different longitudinal drains, and a 15-day experimental period was compared. The quality changes of drainage pipes and elbows are used to judge the concrete effects of the slope and flow velocity of longitudinal drains on the formation of precipitated crystals in drainage pipes. Based on the analysis of the reasons for the blockage of karst tunnel drainage pipes, the corrugated longitudinal drainage pipes are used locally in the tunnel drainage system. The addition of CA (carbonic anhydrase) into the tunnel drainage pipe and the timely addition of high efficiency scale inhibitor into the tunnel drainage pipe can effectively inhibit the formation of precipitated crystals in the drainage pipe and delay the blocking process of the tunnel drainage pipe.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U452.11;U453.6
[Abstract]:In this paper, the clogging failure of karst tunnel drainage system due to the joint action of sediment, surrounding rock particles and surrounding rock debris caused by groundwater seepage movement in tunnel drainage pipe is studied in this paper. On the basis of analyzing and summarizing the previous research results and combining with the model test, the factors affecting the blockage of the tunnel drainage system are analyzed and studied. The main research work is as follows: 1. Based on the field investigation of the tunnel, the chemical composition of the blockage in the drainage pipe of the tunnel was analyzed, and the ion species and concentration of the aqueous solution in the drainage pipe were analyzed at the same time. The causes of tunnel drainage system blockage are analyzed, and the factors affecting the formation of precipitated crystals in tunnel drainage pipes are expounded. The theoretical crystallization rate of precipitated crystals in tunnel drainage pipes is calculated by using empirical formula and DBL formula. It is concluded that the theoretical formula of DBL is more suitable for calculating the crystallization rate of precipitated crystals in karst tunnel drainage pipes. Model test was used to observe the formation of precipitated crystals in drains under the action of slope and flow velocity of different longitudinal drains, and a 15-day experimental period was compared. The quality changes of drainage pipes and elbows are used to judge the concrete effects of the slope and flow velocity of longitudinal drains on the formation of precipitated crystals in drainage pipes. Based on the analysis of the reasons for the blockage of karst tunnel drainage pipes, the corrugated longitudinal drainage pipes are used locally in the tunnel drainage system. The addition of CA (carbonic anhydrase) into the tunnel drainage pipe and the timely addition of high efficiency scale inhibitor into the tunnel drainage pipe can effectively inhibit the formation of precipitated crystals in the drainage pipe and delay the blocking process of the tunnel drainage pipe.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U452.11;U453.6
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相關期刊論文 前10條
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