In the paper,the qualifications for the breaking of the boulders directly by shield machines are studied by means of analysis on the boulder/soil mechanics.

• 通过岩土受力分析得出了盾构机直接破碎孤石的条件,结果表明孤石直径埋深越大,岩石强度与周边土体强度相差越小,孤石越容易被破除。