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Yu J.,Huaqiao University | Chen G.-P.,Zhejiang Dacheng Construction Group Co. | Jiang T.-H.,Zhejiang Dacheng Construction Group Co. | Luo J.,Zhejiang Dacheng Construction Group Co. | Yu H.-B.,Zhejiang Dacheng Construction Group Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

When the rock surface is shallow, the elevation varies, the pit excavation is deep, and the passive foundation soil at the bottom of foundation is shallow, the general diaphragm walls can not meet the displacement or overturning requirements. The outrigger-type diaphragm wall can greatly solve this problem. As the two walls combined into one load bearing and retaining structure, the outrigger-type diaphragm wall can greatly enhance the overall carrying capacity of buildings and anti-seepage effects. Based on the pit protection and extension project of Zhejiang Huanglong Hotel, the monitoring data of the horizontal displacement of walls, the maximum displacement of soils, the axial force of supports and the groundwater levels are employed to analyze the feasibility of the outrigger-type diaphragm walls.

Huang X.,Zhejiang Dacheng Construction Group Co. | Fang J.,Zhejiang Dacheng Construction Group Co. | Cui F.,Zhejiang Dacheng Construction Group Co.
Journal of Geomatics | Year: 2010

We analyze the Japanese calculus of automatic guidance system of shield machine. And with shield construction on actual situation of measurement, we put forward the principle of coordinate calculation of the automatic guidance system of shield machine.

Tao C.,State Oceanic Administration | Wu T.,State Oceanic Administration | Jin X.,State Oceanic Administration | Dou B.,Zhejiang Dacheng Construction Group Co. | And 2 more authors.
Acta Oceanologica Sinica | Year: 2013

Study of petrophysical properties of rocks in seafloor hydrothermal fields has great significance for investigation of seafloor hydrothermal activities, especially for polymetallic sulfides prospecting. In the present study, based on the current experimental conditions, we conducted systematic experiments to measure the magnetic susceptibility, electrical resistivity, porosity, density, as well as acoustic wave velocity of seafloor rocks and sulfides. Subsequently, we measured the physical characteristics of hydrothermal sulfides, basalts and peridotites which were collected from newly discovered seafloor hydrothermal fields at 49.6°E, 50.5°E, 51°E, 63.5°E, and 63.9°E of the Southwest Indian Ridge (SWIR). Previously available and newly collected data were combined to characterize the physical differences between polymetallic sulfides and rocks. We also discussed the impact of hydrothermal alteration on the bedrock and demonstrated how these petrophysical properties of rocks can help in geophysical prospecting of seafloor hydrothermal fields as indicators. © The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg 2013.

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