摘要
越来越大的地下结构体量给地下结构的抗浮设计带来了巨大的挑战,常规以抗拔桩和抗浮锚杆为主的抗浮方法往往导致经济和时间成本大幅增加。以横琴口岸及综合交通枢纽开发工程项目为依托,介绍一种新的排水减压抗浮方案。通过地下室周边的止水帷幕进行截水,减少基坑涌水量,从根本上减少对周边环境的影响;在地下结构底板下设置敞口式大直径无砂混凝土减压井排水,降低水头,减小作用在结构底板上的荷载。实践证明,截排联合,可控制排水带来的影响,增加排水减压系统的可靠性和耐久性,从而确保地下室的安全。
The increasing volume of underground structure brings great challenges to the anti-floating design of underground structure.The conventional anti-floating methods based on uplift piles and anti-floating anchors often lead to a substantial increase in economic and time costs.Based on Hengqin port and comprehensive transportation hub development project,this paper introduces a new drainage decompression and anti-floating scheme.Through the waterproof curtain around the basement to cut off water,reduce the water inflow of the foundation pit,and fundamentally reduce the impact on the surrounding environment.An open-type large diameter sand free concrete relief well is set under the bottom plate of the underground structure to reduce the water level and the load acting on the structural floor.Practice has proved that the combination of interception and drainage can control the influence of drainage,increase the reliability and durability of drainage decompression system,and ensure the safety of basement.
作者
黄俊
宋永良
曲红波
李奇志
陈之
HUANG Jun;SONG Yongliang;QU Hongbo;LI Qizhi;CHEN Zhi(China Construction Second Engineering Bureau Co.,Ltd.Southern China Branch,Shenzhen,Guangdong 518048,China)
出处
《建筑施工》
2020年第9期1630-1632,共3页
Building Construction
关键词
地下工程
抗浮
截排减压
疏水层
underground engineering
anti-floating
interception and drainage decompression
drainage layer
