广州海珠城广场基坑坍塌的主要原因上部结构增层基坑超挖导致原支护桩成为吊脚桩。()
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Which log includes a statement of the conduct，ability，and character of each crew member on
A. Official Logbook
B. Department Logbook
Crew Logbook
D. Smooth Logbook
承重支撑体系用于钢结构及网架安装等满堂支撑体系，承受单点集中荷载700kg以上属超过一定规模的危险性较大的分部分项工程。()
Which entry is NOT required in the Official Logbook？______
A. Steering gear tests
B. Position of the load line and freeboard upon sailing
Commencemet and termination of cargo operations
D. Closure of hatches and sideports upon sailing
某基坑开挖深度15米，可以考虑选用的基坑支护方案有()。
A. 逆作法施工
B. 地下连续墙+内支撑
C. SMW工法+内支撑
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