地下工程引起的不均衡地表沉陷分析

Analysis of non-uniform settlement at the ground induced by underground engineering

地下工程中的开采有时会导致不均衡岩层移动,其延伸到地表则会产生不均衡地表沉陷.在以往研究的基础上,对断层可能导致的不均衡地表沉陷进行了系统的分析.不均衡地表沉陷一般可分为5种类型;确定某一条断层对不均衡地表沉陷可能产生的影响程度时,要全面考虑时间、断层规模、断层面状态、断层的倾角、开挖处与断层的距离、开挖方向与断层走向的关系、覆盖层厚度7个因素,并找出主要的影响因素而确定之,以便采取针对性的防范措施.最后,修正了不均衡沉陷台阶量值的经验公式.

Underground engineering,sometimes, can generate the unbalanced strata displacement, the nonuniform settlement at the ground surface will be then brought about as the unbalanced strata displacement has reached the ground surface.This paper gives a systemic analysis for nonuniform settlement at the ground induced by faults. The nonuniform settlement at the ground can be divided into 5 types. 7 influence factors should be taken into account, such as the time, the fault scale, the state of fault surface, the fault angle, the distance between the excavation place and the fault, the relation of the excative direction and the fault strike, the thickness of the cover. the primary factor should be found out in order to take correlative measure when confirming the influence of fault on nonuniform settlement at the ground. Finally, the experience formula of Q(x) has been modified.