Deformation characteristics of a slope in the Huangjinxia Water Conservancy Project during construction period based on multi-point displacement meters
Multiple sets of structural planes were found on the left bank slope of the Huangjinxia Water Conservancy Project during the construction period. The monitoring data showed that the slope had multiple deformation mutations, and most of the deformation occurred in the range of 20-30 m, with the maximum interval displacement detected by the multi-point displacement meters exceeding 80 mm. Regarding to this problem, the deformation characteristics of slope rock mass are comprehensively analyzed from the aspects of spatio-temporal variation law, eigenvalue statistics and displacement rate, based on the monitoring data of the multi-point displacement meters. The results show that blasting excavation and structural planes are the main factors leading to large deformation of the slope; the main deformation zone of the slope is consistent with the position of the structural planes of fz39, L920 and fz15, so the slope deformation is mainly affected by the above structural planes. Compared with other similar projects, the current slope displacement magnitude is basically in the normal range. With the gradual implementation of reinforcement measures, the slope has basically stabilized, so attention should be paid to the deformation of slope toe in area Ⅰ and Ⅳ, and the support and drainage measures should be strengthened.