本文選題：道路工程　切入點(diǎn)：暫態(tài)飽和區(qū)　出處：《河海大學(xué)學(xué)報(自然科學(xué)版)》2014年03期 　論文類型：期刊論文

【摘要】：為探討降雨入滲條件下粗粒土路堤邊坡暫態(tài)飽和區(qū)的形成條件,分析降雨入滲參數(shù)對暫態(tài)飽和區(qū)發(fā)展規(guī)律的影響,基于室內(nèi)外試驗(yàn)數(shù)據(jù)與實(shí)際氣象數(shù)據(jù),擬定不同的數(shù)值計算方案,采用降雨入滲理論對降雨入滲參數(shù)影響下粗粒土路堤邊坡雨水入滲過程進(jìn)行數(shù)值模擬。結(jié)果表明:降雨強(qiáng)度q與飽和滲透系數(shù)ksat的比值是決定路堤內(nèi)雨水入滲方式及暫態(tài)飽和區(qū)形成的關(guān)鍵因素,當(dāng)q/ksat≥1.5時,路堤邊坡表面及坡腳水平面將形成一定深度的暫態(tài)飽和區(qū),暫態(tài)飽和區(qū)的形成增大了路堤發(fā)生失穩(wěn)的可能;降雨入滲僅會引起路堤邊坡坡面以下水位大幅度上升,對路面中部以下地下水位影響有限;路堤邊坡暫態(tài)飽和區(qū)的擴(kuò)展速度主要取決于q與ksat的大小,而暫態(tài)飽和區(qū)形成的時間與擴(kuò)展面積則受到降雨強(qiáng)度、降雨歷時與飽和含水率的共同影響。
[Abstract]:In order to investigate the formation conditions of transient saturated area of coarse grained soil embankment slope under rainfall infiltration, and to analyze the influence of rainfall infiltration parameters on the development of transient saturated zone, the indoor and outdoor test data and actual meteorological data are used to analyze the influence of rainfall infiltration parameters on the development of transient saturated zone. Develop different numerical calculation schemes, The infiltration process of coarse grained soil embankment slope Rain Water under the influence of rainfall infiltration parameters is numerically simulated by using rainfall infiltration theory. The results show that the ratio of rainfall intensity Q and saturated permeability coefficient ksat is the determining factor of Rain Water infiltration in embankment. And the key factors in the formation of transient saturation region, When Q / Ksat 鈮，

本文編號：1565513