發(fā)布時(shí)間：2018-09-08 07:02

【摘要】：本文針對(duì)運(yùn)營(yíng)巖溶隧道排水系統(tǒng)由于地下水滲流運(yùn)動(dòng)在隧道排水管內(nèi)生成的沉淀結(jié)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(wèn)題進(jìn)行了相關(guān)研究。在分析總結(jié)前人研究成果的基礎(chǔ)上,結(jié)合模型試驗(yàn),對(duì)影響隧道排水系統(tǒng)堵塞的因素進(jìn)行了相關(guān)分析研究,主要的研究工作如下:1.對(duì)依托工程隧道進(jìn)行現(xiàn)場(chǎng)調(diào)研,分析了隧道排水管內(nèi)堵塞物的化學(xué)成分,同時(shí)分析了排水管內(nèi)的水溶液樣品的離子種類(lèi)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(nèi)沉淀結(jié)晶物生成的作用因素。2.利用經(jīng)驗(yàn)公式以及DBL理論公式計(jì)算了隧道排水管內(nèi)沉淀結(jié)晶物的理論結(jié)晶速率,得出DBL理論公式比較適合計(jì)算巖溶隧道排水管內(nèi)沉淀結(jié)晶物的結(jié)晶速率。3.采用模型試驗(yàn)對(duì)不同縱向排水管坡度及流量流速作用下排水管內(nèi)沉淀結(jié)晶物生成的規(guī)律進(jìn)行觀察,通過(guò)對(duì)比以15天為試驗(yàn)周期,排水管及彎頭的質(zhì)量變化來(lái)判斷縱向排水管坡度及流量流速這兩個(gè)因素對(duì)排水管內(nèi)沉淀結(jié)晶物生成的具體作用。4.在對(duì)巖溶隧道排水管堵塞原因分析的基礎(chǔ)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(nèi)加入CA(碳酸酐酶)及在隧道排水管內(nèi)及時(shí)放入高效阻垢劑等措施可以有效抑制排水管內(nèi)沉淀結(jié)晶物的生成,進(jìn)而延緩隧道排水管的堵塞進(jìn)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(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U452.11;U453.6

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本文編號(hào)：2229727