摘要
某工程项目基坑支护因开挖后长期搁置,导致基坑支护体系超过使用时限,为确保基坑支护结构的使用安全,对此基坑支护结构进行了加固处理。采用预应力锚杆对面层脱落部位重新编网并进行锚喷加固;采用探地雷达检测基坑周边地质变化情况,对形成的空洞危害状况进行了专业分析,并选用双重管无收缩双液注浆改良土体工法(即WSS工法)进行加固施工。检测结果表明,采用双液注浆技术配合探地雷达检测,能较好地完成复杂基坑土体的压密、固化和止水,值得推广应用。
Because some pits are left for a long time, the pit supporting may exceed its effective time of using. To ensure the safety of the pit supporting, we should reinforce the pit supporting: to weave and reinforce it with prestressed rock bolts; detect the geological situation around with the ground-searching radar. Then the cavities could be analyzed and treated in WSS. The results show that this method could treat the complicated pit well.
作者
邓祝君
孙菊香
何灵建
DENG Zhu-jun SUN Ju-xiang HE Ling-jian(Technical Center, Nantong Fifth Construction Engineering Co., Ltd., Nantong 226400, Chin)
出处
《南通职业大学学报》
2017年第2期94-99,共6页
Journal of Nantong Vocational University
关键词
深基坑
土体变形
探地雷达
双液注浆
支护加固
deep excavation
soil deformation
ground-searching radars
two-shot grouting
supporting rein-forcement