摘要
为充分利用与开发中心城区稀缺的土地资源,最有效的方法是在地铁沿线隧道上方建设超大地下空间及超高层建筑。但由于地下隧道一旦建成对于周围地块开发的要求极为严苛,地铁沿线的土地规划往往滞后于地铁线路建设,需要在地下隧道工程实施时为未来地块开发预留足够的建设条件。由于隧道工程实施时地块开发一般处于早期研究阶段,地下隧道建成后周边条件、规划往往存在一定变化,前期预留条件时常出现不满足地块开发要求的情况。文中基于既有隧道上方建设基坑的常见难题,通过对于既有连续墙后处理、渗流作用下水、土压力分析等方面进行研究与分析,提出具体的解决方案及相应的应用实例,并根据工程的监测数据及数值模拟结果进行验证,为此类工程的科学设计和建设提供理论基础。
To fully utilize and develop the scarce land resources in central urban area,the most effective way is to construct super-large underground spaces and super high-rise buildings above the tunnels along metro lines.However,once the underground tunnels are completed,the requirements for the development of the surrounding plots are extremely strict.As a result,the land planning along the metro lines often lags behind the construction of metro lines,and it is necessary to reserve sufficient construction conditions for the future plot development when implementing the underground tunnel projects.Since the plot development is generally in the early research stage when the tunnel projects are being implemented,there are often certain changes in the surrounding conditions and planning after the underground tunnels are completed,and the pre-reserved conditions often fail to meet the requirements of plot development.Based on the common problems of foundation pit construction above existing tunnels,the paper studies and analyzes the post-processing of existing diaphragm walls and the analysis of water and soil pressure under seepage,and puts forward specific solutions and corresponding application examples,and verifies them according to the monitoring data and numerical simulation results of the project,which provides a theoretical basis for the scientific design and construction of such projects.
作者
李白宇
麦家儿
郝鹏飞
卢晓智
LI Baiyu;MAI Jiaer;HAO Pengfei;LU Xiaozhi(Guangzhou Metro Design&Research Institute Co.,Ltd.Guangzhou 510410,China)
出处
《广东土木与建筑》
2025年第5期74-78,共5页
Guangdong Architecture Civil Engineering
关键词
地铁隧道
超高层建筑基坑
地铁保护
渗流作用
既有连续墙后处理
subway tunnel
foundation pit of super high-rise building
subway protection
seepage effect
post-treatment of existing diaphragm wall
