胡小波¹，牛  磊^1,2，付  亮^1,2，时树泉³
(1 天津城市建设学院，天津300384; 2 天津市软土特性与工程环境重点实验室，天津300384; 3 中国中铁电气化局一公司，石家庄050010)

[摘要] 利用大型冲击碾压机械进行现场压实试验，根据不同碾压遍数下的路基沉降量、于密度以及弯沉值的测试结果，得出以上三个路基评价控制标准与碾压遍数之间的关系，进而得出最佳碾压遍数。此外，根据拆房土不同虚铺厚度下评价控制标准的对比，同时进行了冲击补强试验测试，得出拆房土处理路基的最佳虚铺厚度，进一步验证了拆房土处理软弱不良路基的适用性。
[关键词] 软弱不良路基；拆房土；冲击碾压；冲击补强

Experimental study on open room soil and impaction compaction method for poor weak subgrade treatment
Hu Xiaobo¹, Niu Leil^1,2, Fu Liang^1,2, Shi Shuquan¹
(1Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin 300384, China; 2 Department of Civil Engineenng, Tianjin Institute of Urban Construction, Tianjin 300384, China; 3 First Engineering Co., Ltd. of China Railway Electrification Bureau Group, Shijiazhuang 050010, China)

Abstract: Based on field compaction test, according to the different compaction quantities of subgrade settlement, the dry density and testing results of deflection value evaluation, it obtains three subgrade compaction quantities and control standards, and the relationship between optimal compaction number of times. In addition, according to the contrast of the open room soil under different pseudo thickness control standard of evaluation, simultaneously has carried on the impact reinforcement experiment test, obtains the open room soil for subgrade treatment best pseudo thickness, further validated open room with poor weak subgrade soil the serviceability. provides reference for the similar projects in future.
Keywords: poor weak subgrade; open room soil; impact compaction; impact reinforce