与我国大陆地区相比,港澳和其他海外地区深基坑工程的标准体系、设计流程、习惯做法等方面都有很大的不同。以澳门妈阁交通枢纽的深基坑设计实践为例,对海外工程中深基坑的支护设计进行了详细介绍,包括地下连续墙嵌固深度的确定、地下连续墙在岩石中向下接长的方法、支撑体系、结构计算、抗倾覆稳定性验算等。将英国标准和香港地区标准中深基坑支护计算的规定与我国大陆标准进行了对比。在设计过程中采用数值模拟法进行基坑支护体系的受力和变形分析。在施工期间利用数值模拟软件对监测数据进行反演分析和预测,保障了施工的顺利进行。
Abstract
The standard system,design procedures,routine practices and other aspects of deep excavations design in Hong Kong SAR (Special Administrative Region) and Macau SAR of China and overseas regions are quite different from those in Mainland China. Based on the design practices of deep excavations in Barra Transportation Hub in Macau SAR,the design of deep excavation support in overseas projects is introduced in detail,including determination of the embedded depth of diaphragm wall,downward extension of diaphragm walls in hard rocks,strut system,structural calculation,verification of stability against overturning,etc. The stipulations of deep excavation design in British Standard and the standard of Hong Kong SAR are compared with those provided in the standards of Mainland China. During desk study,numerical modeling was adopted to calculate the force and deformation of bracing system of excavation; during construction,numerical method was also adopted for back analysis and predictions based on filed monitoring data,which guaranteed smooth construction.
关键词
海外工程 /
深基坑 /
支撑体系 /
地下连续墙向下接长 /
数值模拟 /
抗倾覆稳定性
Key words
overseas project /
deep excavation /
strut system /
downward extension of diaphragm wall /
numerical modeling /
stability against overturning
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参考文献
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