【摘要】：自滲回灌井是我國膠東半島地下水回灌工程中最為重要的組成部分,它一般由回灌井和回灌池組成�，F(xiàn)有自滲回灌井存在著回灌效率低、易沖刷和淤堵等問題,嚴(yán)重影響了回灌工程的回灌效果和使用壽命。本文對現(xiàn)有自滲回灌井進(jìn)行了結(jié)構(gòu)改進(jìn)和優(yōu)化,設(shè)計了三種新型內(nèi)外進(jìn)水式自滲回灌井,給出了新型回灌井單井回灌量的理論計算公式,研制出一套自滲回灌井室內(nèi)回灌試驗裝置,進(jìn)行了內(nèi)外進(jìn)水式自滲回灌井室內(nèi)穩(wěn)定流回灌試驗,得出了新型回灌井的單井回灌量,并進(jìn)行了討論。主要研究成果如下:(1)對現(xiàn)有的自滲回灌井進(jìn)行調(diào)研,剖析自滲回灌井的回灌過程,分析影響自滲回灌井回灌量的各種因素,以及影響自滲回灌井回灌的關(guān)鍵因素�，F(xiàn)有的自滲回灌井存在的主要問題是回灌效率低、易淤堵、易被水沖刷、使用壽命低、耗用建筑材料多、后期維護(hù)成本較高等。(2)設(shè)計出三種新型高效抗沖防淤型自滲回灌井,包括臺形內(nèi)外進(jìn)水式自滲回灌井、方形內(nèi)外進(jìn)水式自滲回灌井、圓形內(nèi)外進(jìn)水式自滲回灌井。內(nèi)外進(jìn)水式自滲回灌井主要是指將回灌池更改為內(nèi)外進(jìn)水式,即將回灌池掏空,使水流能從頂面、外側(cè)面、內(nèi)側(cè)面和底面進(jìn)入回灌井內(nèi)。內(nèi)外進(jìn)水式自滲回灌井增加了硬質(zhì)側(cè)壁結(jié)構(gòu)且頂面做成傾向水流的斜坡,具有較好的抗沖防淤能力。(3)建立自滲回灌井入滲過程的井流模型,提出新型自滲回灌井的滲流控制方程,給出高效抗沖防淤型自滲回灌井回灌量的理論計算公式。(4)設(shè)計了自滲回灌井室內(nèi)試驗裝置,進(jìn)行了新型自滲回灌井室內(nèi)穩(wěn)定流試驗,試驗得出回灌水的入滲流態(tài)、回灌量以及回灌效率。與現(xiàn)有自滲回灌井相比,在回灌池橫截面面積相同的條件下,新型自滲回灌井的回灌量約為現(xiàn)有自滲回灌井回灌量的2.6倍,大大提高了自滲回灌井的回灌效率。(5)利用室內(nèi)試驗數(shù)據(jù),驗證了內(nèi)外進(jìn)水式自滲回灌井回灌量的理論計算公式,對內(nèi)外進(jìn)水式自滲回灌井的綜合折減系數(shù)進(jìn)行推算,推算出內(nèi)外進(jìn)水式自滲回灌井的綜合折減系數(shù)為0.93~0.96,而現(xiàn)有自滲回灌井的綜合折減系數(shù)為0.6,說明新設(shè)計的內(nèi)外進(jìn)水式自滲回灌井在回灌過程中產(chǎn)生的井損要小于現(xiàn)有的自滲回灌井。本文研究成果為地下水回灌中回灌井的選擇提供了多種新型高效自滲回灌井,為新型內(nèi)外進(jìn)水自滲回灌井單井回灌量的確定提供了理論計算依據(jù),試驗所得出的內(nèi)外進(jìn)水自滲回灌井單井回灌量、綜合折減系數(shù)可供實際工程參考使用。研究成果對于我國北方地區(qū)輕微污染區(qū)域和沿海地區(qū)海水入侵進(jìn)行地下水人工回灌、提高雨洪資源利用有效利用率具有重要的現(xiàn)實意義。不足之處,對于新設(shè)計的內(nèi)外進(jìn)水式自滲回灌井,尚未進(jìn)行實際井的現(xiàn)場回灌試驗。
[Abstract]:Self-permeable recharge well is the most important part of groundwater recharge project in Jiaodong Peninsula of China. It is generally composed of reirrigation well and irrigation pool. At present, there are some problems such as low efficiency of recharge, easy scour and blockage, which seriously affect the effect and service life of the reflow project. This paper improves and optimizes the structure of the existing self-permeable well, designs three new types of self-permeable well with internal and external intake, and gives the theoretical calculation formula of the single-well recharge in the new type of recharge well. In this paper, a set of indoor recharge test device for self-permeable well is developed, and the indoor steady-flow recharge test is carried out. The single-well recharge amount of the new type of recirculation well is obtained, and the discussion is carried out. The main results are as follows: (1) the main research results are as follows: (1) to investigate the existing self-permeable irrigation wells, analyze the recharge process of the self-permeable recirculation wells, analyze the various factors that affect the recharge amount of the self-permeable recirculation wells, and the key factors that affect the recharge of the self-permeable recirculation wells. The main problems existing in the existing self-permeable backfilling wells are low efficiency of recharge, easy siltation and clogging, easy to be washed by water, low service life and much consumption of building materials. The later maintenance cost is higher. (2) three new types of high-efficiency anti-erosion and siltation-resistant self-seepage irrigation wells are designed, including the table-shaped internal and external inflow self-seepage irrigation wells, the square internal and external inlet self-seepage irrigation wells, and the circular internal and external inflow type self-seepage irrigation wells. The internal and external inflow type self-permeable irrigation well mainly refers to changing the irrigation pond to the internal and external inflow type, which is about to be emptied, so that the water flow can enter into the well from the top, the outer side, the inner side and the bottom surface. The internal and external inflow self-permeable well increases the hard sidewall structure and the top surface is made into a inclined flow slope, which has better anti-scour and siltation resistance ability. (3) establish the well flow model of the infiltration process of the self-permeable backfilling well, and build up the well flow model of the infiltration process of the self-permeable backfilling well. This paper puts forward the seepage control equation of a new type of self-permeable recirculation well, and gives the theoretical calculation formula of the recharge amount of the high-efficiency anti-erosion and siltation type self-permeable backfilling well. (4) the laboratory test device of the self-permeable backfilling well is designed. The indoor steady flow test of a new type of self-permeable irrigation well was carried out. The infiltration flow pattern, the amount of recharge and the efficiency of reinjection were obtained in the experiment. Compared with the existing self-permeable well, under the condition of the same cross-section area of the irrigation pool, the recharge amount of the new self-permeable well is about 2.6 times that of the existing self-permeable irrigation well, and the recharge amount of the new self-permeable well is about 2.6 times that of the existing self-permeable well. (5) based on the laboratory test data, the theoretical formula for calculating the recharge amount of the internal and external self-permeable recirculation wells is verified, and the comprehensive reduction coefficient of the internal and external self-permeable recirculation wells is calculated, and the experimental data are used to improve the recharge efficiency of the self-permeable well. It is calculated that the comprehensive reduction coefficient of the internal and external self-permeable filling well is 0.93 ~ 0.96, while the comprehensive reduction coefficient of the existing self-permeable backfilling well is 0.6, The results show that the loss caused by the new design in the process of recharge is less than that in the existing self-permeable well. The research results in this paper provide a variety of new and efficient self-permeable wells for the selection of reirrigation wells in groundwater recharge, and provide the theoretical calculation basis for the determination of single-well recharge in the new type of internal and external inflow self-permeable recirculation wells. The experimental results show that the single well recharge can be used as a reference for the practical engineering. The comprehensive reduction coefficient can be used as a reference for practical engineering. The results of this study are of great practical significance for the artificial recharge of groundwater for seawater intrusion in northern China and coastal areas to improve the effective utilization rate of rain and flood resources. For the newly designed self-permeable well with internal and external intake, the in-situ recharge test of the actual well has not been carried out.
【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P641.25

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