CAJ | 학술논문

从力学角度出发，以路基在长期交通荷载作用下不至于变形过大为主要目的，利用动变形控制法，针对路基高度与湿度的相互关系进行了研究。首先，通过室内试验获得了路基土体回弹模量与湿度及压实度的定量关系式；同时基于层状公路结构动力响应解及路基、路面协调变形原理，获得了路基顶面动变形控制标准。结合试验结果和路基顶面动变形控制标准，建立了路基湿度、压实度与路基高度之间的联系。最后，以两种典型沥青混凝土公路结构为例，编制程序进行了数值计算，分析了满足动变形条件下的路基临界高度随路基湿度、压实度的变化规律。结果表明：路基临界高度随着路基湿度的增加而增大。路基湿度低于最优含水率时，路基临界高度随路基湿度和压实度的变化均较小；路基湿度高于最优含水率时，路基临界高度迅速增大，且压实度对临界高度的影响也变得十分显著。研究结果为路基高度和湿度的合理取值提供了新的思路。
종역학각도출발，이로기재장기교통하재작용하불지우변형과대위주요목적，이용동변형공제법，침대로기고도여습도적상호관계진행료연구。수선，통과실내시험획득료로기토체회탄모량여습도급압실도적정량관계식；동시기우층상공로결구동력향응해급로기、로면협조변형원리，획득료로기정면동변형공제표준。결합시험결과화로기정면동변형공제표준，건립료로기습도、압실도여로기고도지간적련계。최후，이량충전형력청혼응토공로결구위례，편제정서진행료수치계산，분석료만족동변형조건하적로기림계고도수로기습도、압실도적변화규률。결과표명：로기림계고도수착로기습도적증가이증대。로기습도저우최우함수솔시，로기림계고도수로기습도화압실도적변화균교소；로기습도고우최우함수솔시，로기림계고도신속증대，차압실도대림계고도적영향야변득십분현저。연구결과위로기고도화습도적합리취치제공료신적사로。
In order to control the deformation of subgrade under long-term traffic load, the dynamic deformation control method is employed to study the relationship between the critical height and the humidity of subgrade from the viewpoint of mechanics. Firstly, a quantitative formula of resilient modulus, humidity and compactness is obtained according to the result of laboratory resilient modulus test. Then, combining the solutions of dynamic response of the multilayered subgrade structures and the principal of compatibility of deformation between pavement and subgrade, the allowable value of dynamic deformation of subgrade top is derived. Based on the quantitative formula and the control standard of dynamic deformation of subgrade top, the relationships among the critical height, humidity and the compactness are built up. Finally, numerical results are obtained by taking two typical asphalt pavement structures for example. It is shown that, the critical height of subgrade increases with the increasing humidity. Both of the subgrade humidity and the compactness have little effect on the critical height of subgrade when the subgrade humidity is less than the optimum water content. However, when the subgrade humidity is more than the optimum water content, the critical height of subgrade increases sharply with the increasing humidity;and the effect of the compactness on the critical height becomes significant. The results provide a new idea for reasonable value of the subgrade height and humidity.