摘要
针对高速公路填方路基在湿陷性黄土地区易发生工后不均匀沉降的问题,以某高速公路K110+080—K110+140段为例,结合现场勘察与监测资料,对沉降机制进行剖析,通过设置排水沟与截水沟,切断外源水入渗途径,并采用高压旋喷桩技术对湿陷性粉土层进行加固。实施后开展1 a期沉降监测,结果表明,复合地基承载力由100 kPa提升至290 kPa,沉降速率显著降低,累计沉降量仅为8.7 mm,裂缝扩展得到有效遏制,为类似工程提供了参考。
In view of the problem of uneven postconstruction settlement of expressway fill roadbed in collapsible loess areas,taking K110+080-K110+140 section of an expressway as an example,combined with field investigation and monitoring data,this paper analyzes the settlement mechanism.By setting drainage ditches and intercepting ditches,the infiltration path of exogenous water is cut off,and the collapsible silt layer is reinforced by high-pressure rotary jet pile technology.One-year settlement monitoring is carried out after the implementation,and the results show that the bearing capacity of the composite foundation is increased from 100 kPa to 290 kPa,the settlement rate is significantly reduced,the cumulative settlement is only 8.7 mm,and the crack propagation is effectively curbed,providing reference for similar engineering.
作者
赵赟
ZHAO Yun(Dingxi Highway Development Center of Gansu Province,Dingxi 740000,Gansu,China)
出处
《工程技术研究》
2026年第1期192-194,共3页
Engineering and Technological Research
关键词
高速公路
路基沉降
湿陷性黄土地区
沉降控制
expressway
roadbed settlement
collapsible loess area
settlement control
