三峡永久船闸高边坡变形监测设计及成果分析

三峡永久船闸高边坡变形及稳定是船闸施工安全和运行正常的关键。在边坡开挖过程中有效观测岩体变形量,掌握岩体变形特性,进而分析预测岩体的变形趋势,对指导边坡开挖及动态设计,确保船闸后期施工和运行期的安全是至关重要的课题。变形监测的优化设计、成功实施及准确的监测成果是完成这个课题的重要保证。永久船闸监测设计遵照“突出重点,兼顾全局,统一规划,分期实施”的总原则进行,变形监测项目主要有表层岩体变形监测,深层岩体变形监测。永久船闸高边坡变形监测系统主要由水平和垂直位移监测网、监测点、倒垂线、引张线、伸缩仪等项目组成,通过三峡工程永久船闸变形监测的设计与实施,证实三峡永久船闸高边坡变形监测资料能正确反映岩体变形情况,为危险块体及岩体裂缝的处理及时提供了准确的监测数据,使施工措施和设计更完善。

Deformation monitoring design and result analysis on high excavated slope of TGP's permanent shiplock

The stability of the high rock slopes of the permanent shiplocks of Three Gorges Project is the key to the safety of the shiplock's construction and normal operation.In the course of the slope excavation,effectively monitoring the deformation quantity of rock mass,exercising mastery of the deformation characteristics of rock mass and then further analyzing and predicting the deformation trend of rock mass is an important subject for guiding the slope excavation and dynamic design and for guaranteing the safety of the shiplocks' later construction and operation.The optimized design,successful implementation of deformation monitoring and accurate monitoring results are the important guarantee for carrying out the subject.The monitoring design of the permanent shiplocks was conducted in accordance with the general principle of "putting stress on main points,taking account of overall situation,unified planning and implementing the deformation monitoring in stages".The deformation monitoring system of the permanent shiplocks is composed of survey nets for horizontal and vertical displacements,monitoring points,inversed plumb lines,tension wires,extensimeters,etc.Through the design and implementation of the deformation monitoring of the permanent shiplocks of Three Gorges Project,it has been proved that monitoring data can correctly reflect the deformation of rock mass and meet the requirement for the timely treatment of dangerous rock blocks and cracks,resulting in more perfect construction measure and design.