摘要
气压劈裂真空预压法是将气压劈裂和真空预压结合起来的新的软土地基处理方法。高压气体进入土体中使其形成裂隙,提高了低渗透土体的渗透性能,从而加速地基沉降速率、缩短处理工期,达到经济高效地加固深厚软基的目的。从控制沉降变形的目标出发,提出气压劈裂真空法处理软基的设计原则、设计内容、参数取值及设计计算方法,并应用于阜宁—建湖高速公路的软基处理工程中,对加固后的地表沉降、深层水平位移、加固前后CPTU锥尖阻力等指标进行监测,取得了较好的效果。气压劈裂真空法加固软土地基的设计方法可为推广该法的工程应用提供参考和依据。
The combined method for vacuum preloading and pneumatic fracturing is a new soft earth foundation treatment. It formed a series cracks when the high pressure gas entered into soils,then the penetrating quality increased,the settlement rate was accelerated and construction times have been cut down,thus the goal of economic efficiently reinforcement of deep soft foundation been achieved.Based on the purpose of settlement deformation controlling,the design principles,design contents,parameter choice and design calculation method was put forward,by the combined method of vacuum preloading and pneumatic fracturing for soft ground improvement.After that,the method was applied to the deep soft soil improvement of Funing-Jianhu Highway,some indexes was monitored such as ground surface settlement,horizontal displacement of deep soft soil,and CPTU static point resistance and good effect was obtained.The design method can be reference basis to engineering application.
出处
《南方能源建设》
2017年第2期141-146,共6页
Southern Energy Construction
关键词
气压劈裂
真空预压
深厚软土
设计方法
加固效果
pneumatic fracturing
vacuum preloading
deep soft soil
design method
reinforcement effect
