摘要
软弱地基特别是含深厚沙土条件下取水泵房大型深基坑设计在开挖条件允许情况下采用半放坡半支护形式,基坑支护采用地下连续墙结构是可行的方案。在深厚松散砂层中施工地下连续墙,由于砂层的稳定性较差,在槽段成孔时成槽机抓斗的扰动以及吊机在槽段旁行走,很容易引起槽孔内砂层坍塌。在槽段两侧采用水泥搅拌桩加固,是避免出现坍塌的经济有效措施。
If the open excavation conditions are feasible , the construction scheme of partially slope excavation and the rest using foundation pit support with underground diaphragm walls can be adopted in water intake pump house large underground pit in deep sand and soft ground .Because of the worse stability of sand layer , the reciprocation of the groove grab bucket in the groove and the crane moving nearby is easily caused the sand layer partial collapse in the groove .The collapse should effectively be avoided through reinforcing the both side＇s sand layer of the groove using cement mixing piles .
出处
《广东水利水电》
2015年第3期32-35,共4页
Guangdong Water Resources and Hydropower
关键词
软弱地基
基坑支护
地下连续墙
soft ground
foundation pit support
underground diaphragm wall
