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Li B.,China Communications Construction Company Ltd. | Li B.,Japanese Ministry of Internal Affairs and Communications Japan | Li B.,Key Laboratory of Port Geotechnical Engineering of Tianjin | Liu J.,Power Construction Corporation of China
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2016

The deep overburden layer under embankment dam foundation is high of permeability. It has seepage stability problems, such as huge leakage, piping and soil flow, and prevention measures should be taken. For a high embankment dam on deep overburden layer, seepage properties are regarded as the main indices to design the quantity, thickness and layout pattern of diaphragm wall, and the finite element method (FEM) and seepage analysis software are used to compare the design schemes and to select the optimum design scheme. The mixed concrete cutoff wall is select as the impermeable body, and an auxiliary cutoff wall is located upstream of the main one. The two cutoff walls are 1.4 m and 1.2 m in thicknesses, and the spacing between them is 14 m. The design scheme of the auxiliary diaphragm wall on the upstream of the main diaphragm wall meets the requirements of the seepage control of embankment dams. © 2016, Chinese Society of Civil Engineering. All right reserved. Source


Li B.,China Communications Construction Company Ltd. | Li B.,Japanese Ministry of Internal Affairs and Communications Japan | Li B.,Key Laboratory of Port Geotechnical Engineering of Tianjin | Liu Z.,China Communications Construction Company Ltd. | Sun P.,China Institute of Water Resources and Hydropower Research
Conference Proceedings of the 3rd International Symposium on Project Management, ISPM 2015 | Year: 2015

With the development of embankment dams construct technology, embankment dams has built higher and higher, over-200m high embankment dam design has been used embankment dam design specifications which only apply to the construction of 200m below embankment dams, embankment dam design specification need improvement. This calculates embankment dam slope stability safety factor under different dam heights, different slope ratios and different seismic intensity based on the ratio safety ratio, and clears slope stability safety factor change variation of over-200m high embankment dam .This paper takes allowed slope stability reliable indicator of extra-200m high embankment dam is 4.2, Calculates the ratio safety ratios of traditional method and reliability method, and does linear regression. The result shows slope stability safety factor of extra-200m high embankment dam values 1.6 under normal conditions, safety factor values 1.3 and allowed reliable indicator 4.2 are at the same risk level. Source


Li B.,China Communications Construction Company Ltd. | Li B.,Japanese Ministry of Internal Affairs and Communications Japan | Li B.,Key Laboratory of Port Geotechnical Engineering of Tianjin | Wang Y.,China Communications Construction Company Ltd. | And 3 more authors.
MATEC Web of Conferences | Year: 2015

With the constant development of construction technology of embankment dam, the constructed embankment dam becomes higher and higher, and the embankment dam with its height over 200m will always adopt the current design criteria of embankment dam only suitable for the construction of embankment dam lower than 200m in height. So the design criteria of high embankment dam shall be improved. We shall calculate the stability and safety factors of dam slope of high embankment dam under different dam height, slope ratio and different seismic intensity based on ratio of safety margin, and clarify the change rules of stability and safety factors of dam slope of high embankment dam with its height over 200m. We calculate the ratio of safety margin of traditional and reliable method by taking the stable, allowable and reliability index 4.2 of dam slope of high embankment dam with its height over 200m as the standard value, and conduct linear regression for both. As a result, the conditions, where 1.3 is considered as the stability and safety factors of dam slope of high embankment dam with its height over 200m under seismic condition and 4.2 as the allowable and reliability index, are under the same risk control level. © Owned by the authors, published by EDP Sciences, 2015. Source


Liu A.-M.,China Communications Construction Company Ltd. | Liu A.-M.,Japanese Ministry of Internal Affairs and Communications Japan | Liu A.-M.,Key Laboratory of Port Geotechnical Engineering of Tianjin | Liang A.-H.,China Communications Construction Company Ltd. | And 2 more authors.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2016

In combination with the actual project, the application of geosynthetics are introduced. The results show that woven nonwoven geotextile, nonwoven geotextile, filling bags and other geosynthetics can be used to solidify soil sea dike project, and they play the role of drainaging, filtration, separation, protection and so on. The key technical problems of mud embankment is solved. The construction of water transportation is promoted. They are worthy of further application. © 2016, Chinese Society of Civil Engineering. All right reserved. Source


Liang A.-H.,China Communications Construction Company Ltd. | Liang A.-H.,Key Laboratory of Port Geotechnical Engineering of the Ministry of Communication | Liang A.-H.,Key Laboratory of Port Geotechnical Engineering of Tianjin | Liu J.-J.,China offshore Oil Engineering Co. | And 6 more authors.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2013

A new vacuum preloading technology for ultra soft soils with footed-in filter tubes is verified through field tests. Compared with the construction technology reinforcement effect and engineering cost of the conventional vacuum preloading technology for surface-layer of ultra soft soils, the new technology is characterized by simple construction technology, low cost and good reinforcement effect. The technology is worthy of being widely spread. Smaller distance of drainage plates (0.4~0.6 m) in newly reclaimed ground can effectively improve the reinforcement effect and reduce consolidation time. The technology has successfully solved the problem that ultra soft foundation has large settlement but low strength increase after reinforcement. Source

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