库盘变形无监测规程规范,结合小湾水电站库盘变形监测成果,分析了库盘对小湾坝基变形深度的影响,给出了库盘对坝基倾斜角度、坝基变形深度影响的监测方法,并对高坝大库工程的库盘监测设计给出了建议,为库盘监测规程规范的建立提供了思路.

通过对小湾高拱坝库盘水准、平面变形网、垂直变形网实测资料进行分析,揭示了小湾库盘沉降变形和平面变形的时空分布规律,并分析了出现该变形现象的原因,指出了小湾库盘变形的影响因素,为高拱坝库盘监测资料分析及监测设计提供了思路.

The layout design of the monitoring system for the concrete face rockfill of Sujiahekou Hydropower Station is introduced herein，and then the monitoring results such as horizontal displacement，settlement，seepage，etc. are analyzed and compared with those from the concrete face rockfill dams of the similar projects in China，furthermore，the dam construction quality and the safety and stability after the impoundment of the reservoir are analyzed and evaluated at last.The condusion can Provide some references for the research Personnel Concerned.

Through the field investigation,field test,technical improvement and each link of the measures,reduced a series of error about the GNSS automatic monitoring system in xiaowan arch dam safety monitoring,improved the measuring accuracy.Combined with the engineering practice of xiaowan,summarized experiences about construction,installation and debugging in establishing perfect GNSS monitoring system,gived full play to the advantages of GNSS monitoring system itself.Contrastd the measurement data with Electronic Total Station and vertical line,good proved the successful application about GNSS monitoring system in xiaowan,which has special significance to monitor deformation condition of xiaowan dam accurately,also important to ensure the safety of the river basin.

论述了使用黄金分割法、斋藤法和双曲线回归法预测桐子林水电站金龙沟砂石料场边坡垮塌事件,进一步证明了以上3种方法在边坡稳定预测中的重要意义,是成功进行边坡失稳预报的又一典型事例.

After foundation excavation for a dam of a hydropower project, the rock mass would be unloaded and relaxed and its mechanical parameters would be lowered, thus influencing the dam stability. This paper makes an analysis of the deformation development law of the unloading rock mass of the dam foundation by analyzing the advance deformation of the dam foundation before excavation and the unloading rebound deformation of the dam foundation after excavation, and by analyzing the monitoring results of the compressive deformation after concreting of the dam and of the whole process deformation after impounding of the reservoir taking into account the results of both deformation test and acoustic test, which provides scientific basis for quality assessment of the arch dam foundation rock mass and for readjustment of the dam foundation rock mass mechanics design parameters, thus giving a reference to projects of the kind.

The paper analyses the relationships between seepage mechanism, seepage discharge and hydraulic gradient in dam from monitored data of two concrete face rockfill dams, and summarizes the seepage status inside dam and gives a specification on influencing factor to the seepage.

The foundation of Xiaowan arc dam has bad geological phenomena such as high ground stress and joint fis-sures. The whole deformation course monitoring such as advanced deformation before dam abutment excavation, rebound deformation after dam foundation excavation and compression deformation after concrete depositing has been introduced. This paper analyzed unloading crack distribution and opening, deformation rules about unloading rock mass of dam foun-dation quantification. This paper also provided scientific reference for estimating rock quality, adjusting rock mechanics design parameters of dam foundation and excavation design and execution of Xiaowan dam foundation. This paper was of great reference worth for similar project.

根据饮水沟堆积体边坡变形特征.并采用数学模型对边坡稳定性进行了综合预测分析,及时提出边坡异常变形的预警;紧密结合开挖、降雨、排水以及加固处理等因素,对大量监测成果资料进行了分析,论证了边坡变形机理.实时分析了抢险加固效果.

This paper presents the method and criterion for judging the spatial intersection of drill holes,by determin- ing the shortest distance between two spatial segments and the nearest point thereon.It can be used to evaluate the spatial relationship between drill holes for different purposes.The complicated projection operations on drawings can be overcome especially in the case of a great number of anchorage cables being interwoven with drill holes for in- strumentation and drainage/observation galleries in slope stabilization engineering.It can also be used to judge the spa- tial intersection of drill holes for grouting,coring and geophysical exploration and pipes or cables in dam engineering and civil engineering.

介绍了瑞士高精度滑动测微计监测沿钻孔中应变分布的原理和方法;采用滑动测微计成功监测了小湾坝基开挖及混凝土压重状态下的岩体卸荷变形,探测卸荷裂隙分布和张开位移量,定量分析了坝基卸荷岩体变形发展规律,为评价坝基岩体质量和调整坝基岩体力学参数提供了依据,可供类似工程参考.

Based on the deformation features of Yinshuigou deposit,the slope stability is forecasted after synthesis analysis by mathematical model and the slope exceptional deformation is warning in time in this paper.Thinking close about several factors such as excavation,rainfall,drainage and reinforcement treatment,a large number of monitoring information is analyzed,the deformation mechanism of the slope is verified,and synchronized reinforcement effect is also evaluated.It provides much scientific reference for many aspects such as making danger elimination plans,adjusting reinforcement parameters,optimizing construction organization and speeding the job schedule.It is also a typical case in the successful warning making and highly effective treatment of slope′s large deformation which may provide reference for similar projects.

Based on lots of monitoring material and factors such as deformation,geology,excavation and reinforcement,thispaper analyzed the deformation characteristics of powerhouse intake vertical high slope about 81 meters high.This paper evaluated the reinforcing effect of controlling unstable wedge,where the the sliding surface was the fault f3 and the action restraining the unload relaxation deformation.Through the information feedback,the pointed dynamic shoring had been designed in time.Therefore,the pre-stressed anchorage cable worked under good condition and played anchorage function fully.

小湾水电站700m级高边坡采用了TCA2003、TCRA1101、Sinco测斜仪、滑动测微计、GPS卫星定位系统等多种先进监测手段,全方位、多角度地密切监测所有开挖边坡;采用监测数据库管理和分析系统,分析开挖边坡的安全稳定性;评价边坡预应力锚索锚固效果;同时,对局部失稳边坡进行了成功预报,对调整边坡加固参数、指导工程安全施工以及确保工程安全起到了重要作用.