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鉴于哈尔滨-大连(哈大)客专路基设计工后沉降不大于15 mm的要求,开展了路基现场试验.对路基中的温度、沉降变形及冻胀力的变化情况进行观测.结论表明:线路所处地区,10月下旬开始冻结,来年2月后地表附近地温过程线开始上抬;冻结层直到4月中旬才全部处于正温,最大冻深约为1.66 m,应做好防治措施.经过观测,路基在经历冻融循环后的沉降变形为10 mm左右,满足设计的要求.路基填料含水量应严格保持为最优含水量,并做好防排水措施,季冻区的路基将不会产生冻胀变形和冻胀力.
In view of the requirements of Harbin-Dalian (Harbin-Dalian) subgrade design post-construction settlement of not more than 15 mm, a subgrade test was carried out to observe the changes of subgrade temperature, settlement deformation and frost heaving force.The conclusion shows that: In the area where it started to freeze in late October, the ground temperature process line near the surface started to rise after February of the next year. The frozen layer was not in normal temperature until mid-April and the maximum freezing depth was about 1.66 m. Observation, subgrade subsidence deformation after going through the freeze-thaw cycle of about 10 mm, to meet the design requirements. Subgrade filler water content should be strictly maintained for the optimal moisture content, and make drainage measures, the quarry in the quarry area will not Frost heaving deformation and frost heaving force.