隧道及地下工程监控量测选测项目/ monitoring and measurement of tunnel and underground engineering optional monitoring items /monitoring and measurement of tunnel and underground engineering optional monitoring items
选测项目为了满足隧道设计和施工的特殊需要，对一些有特殊意义和具有代表性的区段进行的补充测试。结构位移（活动断层）/ structural displacement (active fault) /structural displacement (active fault)
选测项目当隧道及地下工程穿越活动断层段时，受断层蠕滑或错动的影响，该段结构发生的位移变化。围岩压力及支护间接触应力/ surrounding rock pressure and contact stress between supports /surrounding rock pressure and contact stress between supports
选测项目引起地下开挖空间的岩体和支护出现破坏、变形的作用力。土体分层沉降及水平位移/ monitoring of vertical displacement and horizontal displacement in different stratunm /monitoring of vertical displacement and horizontal displacement in different stratunm
选测项目由于隧道施工引起的土体内部沿垂直方向及水平方向的变形。
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