本文選題：真空 + 滲流��； 參考：《中國(guó)地質(zhì)大學(xué)（北京）》2014年博士論文

【摘要】：本文對(duì)真空管井降水法引起的地下水真空滲流場(chǎng)的幾個(gè)主要方面進(jìn)行了研究,研究方法和主要結(jié)果如下： 開展了現(xiàn)場(chǎng)實(shí)驗(yàn)研究。依托北京地鐵14號(hào)線工程,開展了真空管井降水的現(xiàn)場(chǎng)實(shí)驗(yàn),對(duì)出水量、真空度在水平和深度方向的傳遞、孔隙水壓力以及真空沉降等方面進(jìn)行了監(jiān)測(cè),得到了各項(xiàng)指標(biāo)的變化規(guī)律。 進(jìn)行了真空度分布規(guī)律研究。在氣體運(yùn)動(dòng)符合達(dá)西定律的前提下,對(duì)氣體的平面滲流模型和Paul C.Johnson模型進(jìn)行了分析,得到了井徑、井室壓力和影響半徑等對(duì)真空度傳遞規(guī)律的影響。 建立了飽和土孔隙水真空滲流場(chǎng)模型。將土體中氣體的滲流規(guī)律與Dupuit等經(jīng)典的地下水滲流理論相結(jié)合,得到了真空潛水完整井、真空承壓水完整井以及真空潛水-承壓水井作用下的出水量、水位和水頭的分布、水力梯度的變化規(guī)律和解析解。為了驗(yàn)證理論分析的正確性,開展了室內(nèi)抽水實(shí)驗(yàn)和數(shù)值模擬對(duì)理論分析模型進(jìn)行了驗(yàn)證。 對(duì)非飽和土孔隙水真空滲流進(jìn)行了研究。通過分析孔隙水受力情況,得出了重力排水的極限條件；通過分析非飽和土孔隙水的滲流條件,分析了氣體補(bǔ)充量對(duì)孔隙水排出的作用機(jī)制,并通過實(shí)驗(yàn)進(jìn)行了驗(yàn)證；通過對(duì)非飽和土土水特征曲線的研究,提出了將進(jìn)氣值作為真空滲流場(chǎng)影響半徑的觀點(diǎn)：運(yùn)用有限差分法,對(duì)非飽和土孔隙水一維水平真空滲流模型進(jìn)行了求解。 建立了真空條件下的沉降模型�；谡婵斩葌鬟f規(guī)律和水位分布模型,討論了真空作用下僅考慮水位下降情況的沉降計(jì)算；建立了真空條件下的Imai模型、Chai J C模型、彈性力學(xué)模型和飽和土穩(wěn)定滲流有效應(yīng)力模型。 進(jìn)行了真空管井降水的沉降預(yù)測(cè)。運(yùn)用回歸分析法、灰色理論模型GM(1,1)法和BP神經(jīng)網(wǎng)絡(luò)法對(duì)真空降水現(xiàn)場(chǎng)實(shí)驗(yàn)的沉降數(shù)據(jù)進(jìn)行了預(yù)測(cè)分析。 對(duì)層間滯水真空滲流規(guī)律和降水方法進(jìn)行了探討。提出了層間滯水分布的3種形式：水平分布、凹陷分布和傾斜分布。提出了隔水層傾斜分布時(shí)真空井“爬坡”運(yùn)行的降水施工方法。
[Abstract]:This paper studies several main aspects of groundwater vacuum seepage field caused by vacuum tube well precipitation method . The research methods and main results are as follows :

Based on line No . 14 of Beijing Metro Line 14 , the field experiment of vacuum tube well dewatering was carried out . The water output , the transfer of the vacuum degree in the horizontal and deep directions , the pore water pressure and the vacuum deposition were monitored , and the change law of each index was obtained .

According to Darcy ' s law , the plane percolation model and the Paul C . Johnson model of the gas are analyzed , and the influence of the well diameter , the pressure of the well chamber and the radius of influence on the degree of vacuum transfer is obtained .

In order to verify the correctness of the theoretical analysis , the theoretical analysis model is verified by means of indoor water pumping experiment and numerical simulation .

In this paper , the vacuum seepage of pore water in unsaturated soil is studied . By analyzing the stress of pore water , the limit conditions of gravity drainage are obtained .
By analyzing the seepage condition of pore water in unsaturated soil , the mechanism of gas replenish on pore water discharge was analyzed , and the experiment was verified .
Based on the study of the characteristic curve of unsaturated soil water , this paper puts forward the viewpoint that the inlet value is used as the influence radius of the vacuum seepage field : using finite difference method , the one - dimensional horizontal vacuum seepage model of unsaturated soil pore water is solved .

The settlement model under vacuum condition is established . Based on the rule of vacuum transfer and the model of water level distribution , the settlement calculation considering the decline of water level is discussed under vacuum .
The effective stress model of Imai model , model J C model , elastic mechanics model and saturated soil under vacuum condition is established .

Based on the regression analysis , the grey theory model GM ( 1,1 ) method and the BP neural network method are used to predict the settlement data of the vacuum precipitation field experiment .

In this paper , three forms : horizontal distribution , sag distribution and inclination distribution are put forward in this paper .
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)（北京）
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：P641.2;TU463

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