【摘要】：為實(shí)現(xiàn)路面結(jié)構(gòu)快速有效排水,基于非飽和滲流理論,提出采用復(fù)合土工合成排水材料的新型路面排水系統(tǒng),該系統(tǒng)由三部分組成,從上而下依次為水力傳導(dǎo)層、毛細(xì)防滲層和隔離層。開(kāi)展了新型路面排水系統(tǒng)模型試驗(yàn)和數(shù)值模擬分析以研究降雨入滲條件下新型路面排水系統(tǒng)性能;模型試驗(yàn)通過(guò)在路面結(jié)構(gòu)的基層和路基分別設(shè)置張力計(jì),實(shí)時(shí)監(jiān)測(cè)基層和路基基質(zhì)吸力變化;采用控制變量方法,建立考慮非飽和滲流的數(shù)值分析模型,分析新型路面排水系統(tǒng)設(shè)置位置、厚度、坡度對(duì)排水性能的影響。研究結(jié)果表明:新型路面排水系統(tǒng)可將入滲水快速有效排除,基層材料在試驗(yàn)過(guò)程始終處于非飽和狀態(tài),并在降雨停止后第10min基層的基質(zhì)吸力開(kāi)始回升;新型路面排水系統(tǒng)能夠防止水下滲至路基,降雨過(guò)程中路基土的吸力始終保持在初始吸力值;采用新型路面排水系統(tǒng)時(shí),基層體積含水率在降雨過(guò)程中不斷上升但未達(dá)到飽和體積含水率,在降雨停止后基層體積含水率呈現(xiàn)小幅下降,路基體積含水率則保持不變;在面層和基層之間、基層和路基之間均設(shè)置新型路面排水系統(tǒng)更有利于控制基層吸力和體積含水率;增加新型路面排水系統(tǒng)厚度和坡度可在一定程度上減小基層材料的含水量,提高基層承載比;研究成果可為新型路面排水系統(tǒng)工程應(yīng)用提供理論依據(jù)。
[Abstract]:In order to realize rapid and effective drainage of pavement structure, based on unsaturated seepage theory, a new type of pavement drainage system based on composite geosynthesized drainage material is proposed. The system is composed of three parts, from top to bottom being hydraulic conductive layer. Capillary impervious layer and isolation layer. The model test and numerical simulation analysis of the new pavement drainage system are carried out to study the performance of the new type pavement drainage system under the condition of rainfall infiltration. In the model test, a tensimeter is set up in the base and roadbed of pavement structure to monitor the change of suction of the base and subgrade in real time. By using the control variable method, a numerical analysis model considering unsaturated seepage flow is established, and the influence of the location, thickness and slope of the new drainage system on the drainage performance is analyzed. The results show that the new drainage system can remove the infiltration water quickly and effectively, and the base material is in unsaturated state all the time in the test process, and the matrix suction of the base course begins to rise 10 minutes after the rain stops. The new drainage system can prevent the subaqueous infiltration to the roadbed, and the suction of the roadbed soil keeps at the initial suction value in the course of rainfall. When the new road drainage system is adopted, the volume water content of the base course increases continuously but does not reach the saturation volume water content in the process of rainfall. After the rainfall stops, the volume water content of the base course decreases slightly, while the volume moisture content of the subgrade remains unchanged. It is more beneficial to control the suction and volume moisture content of the base course by setting up a new road drainage system between the surface layer and the base course and between the base course and the roadbed. Increasing the thickness and slope of the new pavement drainage system can reduce the water content of the base material to a certain extent, and improve the bearing ratio of the base course, and the research results can provide the theoretical basis for the application of the new road drainage system engineering.
【作者單位】： 福州大學(xué)土木工程學(xué)院;福建農(nóng)林大學(xué)金山學(xué)院;
【基金】：福建省交通運(yùn)輸廳交通運(yùn)輸科技發(fā)展計(jì)劃項(xiàng)目(201423)
【分類(lèi)號(hào)】：U417.3

【相似文獻(xiàn)】

相關(guān)期刊論文 前8條

1 梁海;胡積興;李堯;呂新成;;西安咸陽(yáng)國(guó)際機(jī)場(chǎng)專用高速公路路面排水系統(tǒng)綜合優(yōu)化設(shè)計(jì)[J];公路;2009年06期

2 王玉崢,魏家民;淺談路面排水系統(tǒng)設(shè)計(jì)及應(yīng)用[J];交通科技;2005年02期

3 黎偉斌;;高等級(jí)公路瀝青路面排水系統(tǒng)的設(shè)計(jì)與探討[J];中國(guó)水運(yùn)(學(xué)術(shù)版);2007年04期

4 ;成綿高速公路路面排水系統(tǒng)設(shè)計(jì)簡(jiǎn)介[J];西南公路;1997年02期

5 何莉;上海市高等級(jí)公路路面內(nèi)部排水設(shè)計(jì)探討——陳海公路中段路面排水系統(tǒng)設(shè)計(jì)[J];中國(guó)市政工程;2005年03期

6 謝殿臣,王莉,李偉,蘇本連;水泥混凝土路面結(jié)構(gòu)排水系統(tǒng)的研究[J];黑龍江交通科技;2000年04期

7 周鑫;;道路工程排水評(píng)價(jià)淺析[J];科技風(fēng);2009年05期

8 ;[J];;年期

相關(guān)碩士學(xué)位論文 前1條

1 馮啟軍;立交橋下穿引道排水系統(tǒng)研究[D];山東大學(xué);2009年

，

本文編號(hào)：2462700