The temperature gradient is measured in 6 wells of the Three Georges well network observation network.The result shows that the influence depth of sun-radiation heat is 20- 30 m.The water temperature gradient is different in deferent wells,the diversity of temperature gradient in different depth in one well is obvious.Stratum lithology,development of rock mass and sun-radiation heat play important roles in affecting the temperature gradient.

The design of violent vibration record terminal is proposed.The acceleration is detected by MEMS accelerometer and transformed into digital signal by A/D module.The data are transmitted to remote data center by GPRS in DTU module.This design has the characteristics of small size,easy to install and free of maintenance.

The three-dimensional gravity and tilt measurement results with bore-hole system show that the resolution power of the system are 0.1×10-8ms-2 for gravity and 0.000 2″ for tilt which reaches the design requirements and can meet the need of the solid tide observation and earthquake monitoring.

The design idea,the overall structure and the principle of operation of main components of extensometer of USBE-1type and the test at stations are introduced.Test results show that thanks to the development of a sealing structure of high-precision capacitance sensor for micro-displacement the length of instrument baseline can be shortened greatly for example,to not more than 1 m and it can record the clear response to the solid tides,so can meet the small space and requirement for earthquake emergency.

On the basis of analysis of the change of water level on may 12,2008 from the 8 wells in the Three Gorge well network,a method for inverting the parameters of the strain tide effect according to the tide theory of the pressure well is adopted.The adjustments of the stress field at the dam site and the head of the Three Gorge reservoir area are cauculated.

On the basis of analysis of the change of water level related to earth tide,atmospheric pressure at 8 stations among the the ground water monitoring well network in the Three Gorges,the sensitivity of response to earth tide,co-efficient of atmospheric pressure are cauculated.It can be shown that because of the particular well location,high elastic modulus,low porosity and high compressibility coefficient,the water well is quite sensitive to small stress-strain variations.

By use of modern electronic technology and computer network technology,the intelligent and networking of the GS gravimiter are realized.

Taking the data of water temperature of the underground water monitoring well network in the Three Gorges area in 2006 for analysis the author has summarized the dynamical change of this data in the course of the second-phase impounding on the basis of the analysis of the normal status of the water temparature and the affecting factors.It is found that the effect of the reservoir impounding on the dynamics of the water temparature is evident.

On the basis of the observations of ground water level monitoring well network for the induced earthquakes in Three Gorges in 2006 and the normal dynamic characteristics and the influence factors of ground water, the dynamic changes of the relative observation items during second impoundment of the reservoir are analyzed.The results indicate that the effect of the impoundment on ground water dynamic is obvious.

Seeing that the moving apparatus should have the characteristics of antivibration,small volume,convenient adjustment,strong noise immunity and the like,the design thought and method for the optical system of TROS-Ⅰ moving satellite laser ranger are introduced and the introduction is focused on designing the structure,determining the size of key component and selecting the important elements of optical system.The long-term actual measurement has verified that this optical system not only meets the general design requinement of moving satellite laser ranger,but also is economic and practical.

The observational well network in Three Gorges acts as an important role in monitoring the induced earthquakes,but the running condition has not been well in recent years,the integrity and the validity of data have been lower.As the existent system is renewed by use of DSW-01 water level meter and related techniques,thus it is running normally now.This paper introduces the basic principle of DSW-01 water level meter,the structure of new system,the results measured comparatively and its application to the observational well network in Three Gorges.

Seeing that the moving apparatus should have the characteristics of antivibration,small volume,convenient adjustment, strong noise immuity and the like, the design thought and method for the mechanical system of TROS-Ⅰ moving satellite laser ranger are introduced and the introduction is focused on the structural design of rotating disk and the selection of importent elements.The long-term actual measurement has verified that this mechanical system is satisfied for the general design requirement of moving satellite laser ranger.

On the basis of DZW-Ⅰ gravimeter, we have developed improved DZW-Ⅱ with a new digital intelligence design of electro-mechanical lot. This paper introduces the basic principle of the instrument, analyzes the problems in practical use.Thus we have improved the instrument design, raised its credibility and stability further.

概述了线性静电反馈的基本原理.LCR-G型重力仪进行线性静电反馈自动平衡的技术改造后,分辨率由原来的0.01×10-5ms-2提高到0.001×10-5ms-2,与DZCW1型智能化重力数据采集控制仪、计算机等一起组成便携式重力固体潮数字化数据采集系统.系统可进行数据实时处理、图像显示和数据传输.试验结果表明:系统性能稳定、可靠,操作方便、灵活、快捷,可用于监测重力场在时空上的连续变化.

介绍了SS-Y型短基线伸缩仪总体设计思想、整体结构和主要部件的工作原理及台站试验情况.试验结果表明,由于使用含铌特种因瓦棒(为基线)和高灵敏度的换能器、精密超微量标定平台以及有效的操作系统,在缩短基线的条件下,保持了高精度与高稳定性,在NS分量不大于6m、EW分量不大于10m的基线上,能记录到清晰的应变固体潮汐,其观测精度优于现有台站的观测水平,并彻底地解决了石英管炸裂、汞泄漏污染现象,同时,智能化记录控制器提高了自动化程度.

阐述了具有国产化、小型化、数字化、智能化特点的DSQ型短基线水管仪的原理、结构与性能指标,并介绍了该仪器在7个试验台8条短基线上的试验与监测记录、精度估算结果.在全国30多个台站与朝鲜平壤大成山地震台的推广证明:该仪器在小于或等于5*!m的洞体基线上均能取得清晰、光滑、令人满意的倾斜固体潮汐观测结果,成功率达100%,精度达当今国际同类先进水平.

介绍了SS-YD型断层观测伸缩仪的系统组成及其基本原理. 该系统实行现场自动采集和自动储存并由"数据交换器”进行数据调用和回放,具备交直流电源自动转换及有效的避雷装置,实现了无人值守.仪器所得观测数据稳定,并记录到清晰的应变固体潮汐与台湾"9.21”大地震0.5?μm的同震阶跃.

为提高全国重力台网的监测能力,介绍了利用现代电子技术、传感技术和计算机技术的最新成果对Gs重力仪进行的集成化、数字化改进.改进后的Gs重力仪的观测可靠性、观测资料质量及自动化程度得到提高,并具备数字接口功能.