Research on In-situ Stress Measurements in Deep Boreholes in High Altitude Area and Its Applications

Abstract: Composite material is the central issue of new material development. The interface structure plays a vital role in the properties of composite material. There are a lot of achievements in the study of interface transition zone. This paper presents a coupling technique under the guidance of interface theories. The micro structure and strength of heat insulation material can be improved obviously by application of the coupling technique .

Key words: interface coupling; heat insulation material; strength

YU Xinkai QUAN Hai WANG Xu XIA Lina

(PowerChina Chengdu Engineering Corporation Limited, Chengdu , Sichuan, 610072,China)

Abstract: Research on in-situ stress measurements in deep boreholes in high altitude area is conducted and test system is improved to apply it to borehole zk001. The test results show that the test method and test system can meet the test requirements . The difference between deep boreholes in high altitude area and short boreholes in low altitude area during test is also summarized .

high altitude area; deep borehole ; in-situ stress ; hydraulic fracturing

Application of Interlayer Lock Water Technology in Concrete

XU Zhonghao HE Shulin TIAN Xianzhong YANG Dailiu WU Feng ZHAO Hongyuan

(Monitoring and Testing Institute of PowerChina Chengdu Engineering Corporation Limited, Chengdu , Sichuan, 610072,China)

Abstract: The mass concrete cracks are normal phenomenon which is the most concerned problem in the engineering field. To solve the problem, a series of technical measures are adopted , such as mix optimization , high content fly ash and expansive agent, anti-crack fiber etc. These methods play a certain role in controlling crack occurrence and expansion. In this paper, interlayer lock water technology is used for developing a new type of excellent anti-crack material , to significantly decrease cracks or even prevent the possibility of cracks in mass concrete and improve the crack resistance of concrete.

Key words: concrete ; interlayer lock water technology ; strength ; anti-crack

Design of Dam Appearance Automatic Monitoring System and Environmental Impact Assessment

HUA Boshen LIU Manjiang LIU Feng

(PowerChina Chengdu Engineering Corporation Limited, Chengdu , Sichuan, 610072,China)

Abstract: This paper presents three kinds of appearance automatic systems and preliminary design is made based on concrete gravity dam in China. Composition framework of automatic monitoring system and function and relation of each subsystem are introduced . Control network subsystem in appearance automatic systems , GNSS and Robot integrated monitoring subsystem and monitoring center subsystem are designed . Through observation environment testing , the error source of each system is fully considered to achieve the purpose of optimal design.

Key words: dam automatic monitoring ; GNSS ; georobot; environment assessment

Application of Interface Coupling Technology in Heat Insulation Materials

DING Qing SHEN Tianyou LUO Ankai YANG Dailiu TIAN Xianzhong ZHAO Hongyuan

(Monitoring and Testing Institute of PowerChina Chengdu Engineering Corporation Limited, Chengdu , Sichuan, 610072,China)