A.70MPa B.75MPa C.80MPa D.100Mpa
A.超前注漿加固 B.根據(jù)土質(zhì)確定合適的開挖進(jìn)尺 C.現(xiàn)場(chǎng)監(jiān)控測(cè)量 D.及時(shí)支護(hù)