摘要
一个24-33m深的上海地铁换乘站交叉开挖工程已经进行了两年的施工和监测。这项工程开挖面积达9000且由地下连续墙支撑。为了施工方便，将基坑分为四个不同大小和深度的区域（多个部分）。根据现场监测数据的分析，获得的主要研究结果如下：（1）测得的墙体挠度和地面沉降量均小于同类案例；（2）喷射注浆和基坑几何形状都是决定基坑性能的关键因素；（3）墙体最大挠度位置随开挖深度变化明显，表现为3种模式；（4）柱体抬升量与开挖深度密切相关；（5）大多数支板的轴力都在设计值的40%以内，表明支板系统是安全的。DOI: 10.1061/(ASCE)GT.1943-5606.0001681.copy;2017 American Society of Civil Engineers.
关键词：大型地铁换乘站；交叉开挖；软粘土；现场监测。
Abstract
A 24–33-m-deep cross excavation of a metro interchange station in Shanghai soft clay has been constructed and monitored for 2 years. The excavation area was 9,000 m2 and supported by diaphragm walls. For construction convenience, the excavation was split into four zones (multiple pits) with varied sizes and depths. On the basis of the interpretation of field monitoring data, the following major findings were obtained: (1) the measured wall deflections and ground settlements were smaller compared with those of similar case histories; (2) bot jet-grouting and the geometry of pit played a key role in determining pit performance; (3) the location of maximum wall deflection varied dramatically with excavation depth and displayed three patterns; (4) the measured column uplifts were closely related to excavation depth; and (5) the axial forces of most struts were within 40% of design value, indicating safe for the strut system. DOI: 10.1061/(ASCE)GT.1943- 5606.0001681. ? 2017 American Society of Civil Engineers. Author keywords: Large-scale metro interchange station; Cross excavation; Soft clay; Field monitoring.
目录
1.前言 3
2.场地描述及地下情况： 3
3.交叉建设地铁换乘站 4
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