CAJ | 학술논문

设计设备研究土工格栅HDPE50在侧限(100 kPa)约束和无侧限约束下的时温叠加蠕变试验。利用时温叠加原理将不同温度下的蠕变试验曲线移动形成一条光滑的主曲线准确地确定土工格栅HDPE50的蠕变折减系数。通过试验数据反算的C1，C2值验证试验的合理性。研究结果表明：侧限约束对土工格栅蠕变特性影响显著，侧限约束条件下106 h长期蠕变强度比无侧限荷载下的长期蠕变强度小37%。无侧限时温叠加蠕变试验和侧限时温叠加蠕变试验确定的蠕变折减系数RFCR1，RFCR2分别为2.4，1.8，在侧限蠕变试验中根据现有规范计算的蠕变折减系数RF CR3为1.7。同RF CR2相比，RF CR1，RF CR3作为同一工程的设计依据使工程造价分别增加17%，25%。侧限蠕变试验计算蠕变折减系数建议采用侧限约束下的拉伸强度，工程设计建议采用RF CR2。
설계설비연구토공격책HDPE50재측한(100 kPa)약속화무측한약속하적시온첩가연변시험。이용시온첩가원리장불동온도하적연변시험곡선이동형성일조광활적주곡선준학지학정토공격책HDPE50적연변절감계수。통과시험수거반산적C1，C2치험증시험적합이성。연구결과표명：측한약속대토공격책연변특성영향현저，측한약속조건하106 h장기연변강도비무측한하재하적장기연변강도소37%。무측한시온첩가연변시험화측한시온첩가연변시험학정적연변절감계수RFCR1，RFCR2분별위2.4，1.8，재측한연변시험중근거현유규범계산적연변절감계수RF CR3위1.7。동RF CR2상비，RF CR1，RF CR3작위동일공정적설계의거사공정조개분별증가17%，25%。측한연변시험계산연변절감계수건의채용측한약속하적랍신강도，공정설계건의채용RF CR2。
Based on time-temperature superposition principle:a new creep equipment was designed to study the grogrids HDPE50 creep characteristic under confined load(100 kPa) and no confined load. Based on time-temperature superposition principle:the master curves were obtained from creep curves at different temperature to determine the creep reduction factor accurately. The value ofC1,C2 calculated inversely by the tests data verify the rationality of the tests. The research indicate that:the effect of confined load on geogrids creep is obvious:the long time(106 h) creep value under confined load is 37% smaller than that under no confined load. The creep reduction factor calculated by time-temperature superposition creep test considered with confined load and conventional time-temperature superposition creep testRFCR1:RFCR2is 2.4,1.8 respectively. The creep reduction factorRFCR3calculated by the existing specifications is 1.7. Compared to theRFCR2,RFCR1 andRFCR3 will make the cost increased by 17%,25% respectively when applied to the same project design. The calculation of creep reduction factor in time-temperature superposition creep test considered with confined load is suggested to use the tensile strength under confined load:the design of project is suggested to useRFCR2.