本文選題：滲流　切入點：排水孔　出處：《巖土力學(xué)》2017年01期 　論文類型：期刊論文

【摘要】：排水孔是降低巖土體中地下水位和減小滲透壓力的重要設(shè)施。因排水孔孔徑小、排列密集,研究排水孔列的簡化模擬方法對減小滲流數(shù)值計算規(guī)模,提高計算效率十分必要�；诹髁康刃г淼囊詼洗械难娱L滲徑法,因其概念清晰、實現(xiàn)簡便,在承壓含水層井列的滲流場模擬中應(yīng)用廣泛。現(xiàn)有以溝代井列的延長滲徑法中附加滲徑計算公式與井深和含水層厚度息息相關(guān),使得該方法應(yīng)用于多層和有自由面的問題困難重重。針對現(xiàn)有延長滲徑法的局限性,提出適用于有自由面的各向異性多種介質(zhì)中排水孔列滲流問題的延長滲徑法,附加滲徑長度的確定不再受到孔深和含水層厚度的影響。采用該方法對幾個典型的溢流型、逸出型和復(fù)合型排水孔列進行滲流場有限元分析,并與排水孔直接模擬的結(jié)果進行對比。結(jié)果表明,延長滲徑法得到的排水孔的流量與排水孔直接模擬法的流量相差很小,且兩種方法獲得的自由面基本吻合。因此,提出的延長滲徑法是模擬排水孔列滲流行為的簡單而有效的方法。
[Abstract]:Drainage holes are important facilities for reducing groundwater level and seepage pressure in rock and soil. Because of the small aperture and dense arrangement of drainage holes, the simplified simulation method of drainage hole train can reduce the scale of numerical calculation of seepage flow. It is necessary to improve the calculation efficiency. Based on the principle of flow equivalence, the extended seepage path method with ditch instead of well series is simple and easy to realize because of its clear concept. It is widely used in the seepage field simulation of confined aquifer series. The calculation formula of additional seepage diameter in the extended seepage diameter method with trench instead of well column is closely related to the depth of the well and the thickness of the aquifer. It is difficult to apply this method to the problems of multilayer and free surface. In view of the limitation of the existing extended seepage path method, the extended seepage diameter method is proposed to solve the seepage problem of drainage holes in anisotropic multi-media with free surface. The determination of additional seepage diameter length is no longer affected by the depth of the pore and the thickness of the aquifer. This method is used to analyze the seepage field of several typical overflow, escape and composite drainage holes. The results show that the discharge of the drainage hole obtained by the extended seepage diameter method has little difference from that obtained by the drainage hole direct simulation method, and the free surface obtained by the two methods is basically consistent with that obtained by the two methods, and the results are compared with the results obtained by the direct simulation of the drainage hole. The extended seepage diameter method is a simple and effective method to simulate the seepage behavior of drainage holes.
【作者單位】： 北京科技大學(xué)土木與資源工程學(xué)院;中國農(nóng)業(yè)大學(xué)理學(xué)院;四川能投電力開發(fā)有限公司;
【基金】：中央高�；究蒲袠I(yè)務(wù)費專項資金項目(No.2013BH008)資助項目 中國農(nóng)業(yè)大學(xué)教育基金“巖土力學(xué)研究創(chuàng)新團隊”項目~~
【分類號】：TV223.4

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