半刚性基层表面抗冲刷性能试验与分析

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摘要 Free water accumulated between pavement surface and base can flow at high speed due to differential pressure, thereby producing a pumping effect. This condition may scour the base surface, causing damage to the road surface. On the basis of the principles of scouring of a semi-rigid base material, vibrating water flow erosion and wheel rolling scouring tests were conducted using a concrete shaking table and an asphalt mixture rutting tester to evaluate the anti-erosion performance and anti-scouring effect of a semi-rigid base. According to the comparison results of the two types of base materials and three anti-erosion measures, the erosion resistance of cement stabilized graded gravel is superior to that of cement stabilized grit. Using emulsification asphalt penetration treatment and earthwork cloth produces a significant effect on reducing the surface erosion of a semi-rigid base material. The scouring mass of the base material can usually be reduced by 60% to 80% or more, in one case up to 94.4%. With regard to the anti-erosion effect, "emulsified asphalt permeation treatment + earthwork cloth" is the most superior solution of the three, followed by earthwork cloth reinforcement, and then "emulsified asphalt permeation treatment" utilization. In comparison with the non freeze-thawed specimens, the scouring mass of the freeze-thawed specimens increases slightly. The effect of the anti-erosion measures remains promising under the conditions of freeze-thaw cycles. For the cement concrete pavement, applying simulated dowel bars in contraction joints reduces erosion by 40.7% to 66.3%. Results show that the scouring mass of the base material in the vibration flow scouring test is larger than that of the wheel rolling scouring test, while the overall trend remains constant. For nonquantitative analysis of semi-rigid base materials, either one of the two erosion test methods can be utilized to analyze and compare the erosion resistance and anti-erosion effect of the base material.

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	高伟
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	李秀凤

关键词 ： road engineering, anti-scouring performance of semi-rigid base, comparative experiment, anti-scouring measures, wheel rolling scouring test

Abstract：Free water accumulated between pavement surface and base can flow at high speed due to differential pressure, thereby producing a pumping effect. This condition may scour the base surface, causing damage to the road surface. On the basis of the principles of scouring of a semi-rigid base material, vibrating water flow erosion and wheel rolling scouring tests were conducted using a concrete shaking table and an asphalt mixture rutting tester to evaluate the anti-erosion performance and anti-scouring effect of a semi-rigid base. According to the comparison results of the two types of base materials and three anti-erosion measures, the erosion resistance of cement stabilized graded gravel is superior to that of cement stabilized grit. Using emulsification asphalt penetration treatment and earthwork cloth produces a significant effect on reducing the surface erosion of a semi-rigid base material. The scouring mass of the base material can usually be reduced by 60% to 80% or more, in one case up to 94.4%. With regard to the anti-erosion effect, "emulsified asphalt permeation treatment + earthwork cloth" is the most superior solution of the three, followed by earthwork cloth reinforcement, and then "emulsified asphalt permeation treatment" utilization. In comparison with the non freeze-thawed specimens, the scouring mass of the freeze-thawed specimens increases slightly. The effect of the anti-erosion measures remains promising under the conditions of freeze-thaw cycles. For the cement concrete pavement, applying simulated dowel bars in contraction joints reduces erosion by 40.7% to 66.3%. Results show that the scouring mass of the base material in the vibration flow scouring test is larger than that of the wheel rolling scouring test, while the overall trend remains constant. For nonquantitative analysis of semi-rigid base materials, either one of the two erosion test methods can be utilized to analyze and compare the erosion resistance and anti-erosion effect of the base material.

Key words： road engineering anti-scouring performance of semi-rigid base comparative experiment anti-scouring measures wheel rolling scouring test

收稿日期: 2017-11-20

基金资助:Supported by the Science and Technology Project of Ministry of Transport（No.2009318774052）

通讯作者: GAO Wei E-mail: 251688382@qq.com

引用本文:

高伟, 崔巍, 李秀凤. 半刚性基层表面抗冲刷性能试验与分析[J]. Journal of Highway and Transportation Research and Development, 2018, 12(4): 10-17.
GAO Wei, CUI Wei, LI Xiu-feng. Experiment and Analysis of Anti-erosion Performance of Semi-rigid Base Surface. Journal of Highway and Transportation Research and Development, 2018, 12(4): 10-17.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/ 或 http://manu27.magtech.com.cn/Jwk_gljtkj_en/CN/Y2018/V12/I4/10

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