CAJ | 학술논문

以京新高速某季节性冻土高边坡为背景,通过考虑伴有相变的瞬态温度场与应力场耦合,运用有限元分析软件ANSYS,分别模拟研究了含水率、温度、坡率、有无护坡等因素对边坡位移场、应力场和温度场的影响,并通过比较边坡安全系数的大小,判断各因素对边坡稳定性的影响.计算结果表明:边坡稳定性与含水率、坡率、边坡高度呈负相关,即数值越大稳定性越低;而温度作为影响季冻区边坡稳定的重要外部条件,当负温值位于-10℃以上时,各个指标对其敏感度较高,随着温度的进一步降低,各指标对温度的灵敏度逐渐减小;此外,施作护坡可有效地减小边坡的最大位移和冻结深度,增强其稳定性.
이경신고속모계절성동토고변파위배경,통과고필반유상변적순태온도장여응력장우합,운용유한원분석연건ANSYS,분별모의연구료함수솔、온도、파솔、유무호파등인소대변파위이장、응력장화온도장적영향,병통과비교변파안전계수적대소,판단각인소대변파은정성적영향.계산결과표명:변파은정성여함수솔、파솔、변파고도정부상관,즉수치월대은정성월저;이온도작위영향계동구변파은정적중요외부조건,당부온치위우-10℃이상시,각개지표대기민감도교고,수착온도적진일보강저,각지표대온도적령민도축점감소;차외,시작호파가유효지감소변파적최대위이화동결심도,증강기은정성.
Based on a seasonal frozen high slope in JING-XIN highway, the coupling effect of the instantaneous temperature field with phase change and the stress field was considered. By using the finite analysis software ANSYS, the influences of moisture content, temperature, slope rate, slope protection on the slope displacement filed, stress field and temperature field were simulated separately. Besides, by comparing the safety coefficients, the influences of these factors on slope stability were judged. The calculated results are as follows. moisture content, slope rate and slope height are negatively correlated to stability, that is, the greater the indicators the less stable the slope; while as one of the most important conditions which influence the stability of seasonal frozen slopes, when the temperature is below -10℃, the indicators are more sensitive, with the decrease of temperature, the sensitivities of these indicators decrease gradually; besides, the slope protection can effectively reduce the maximum displacement and frozen depth of slope, thus improving the stability of slope.