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Ding J.-S.,Changan University | Liu B.-Q.,Changan University | Xian Y.-Q.,Changan University | Xian Y.-Q.,China Merchants Property Development Co.
Chang'an Daxue Xuebao (Ziran Kexue Ban)/Journal of Chang'an University (Natural Science Edition) | Year: 2010

Based on the design practice of foundation ditches in soft soil district and the concept of equivalent rigidity, one-row piles was used to simulate the retaining structure with space double-row layout dislocation PHC piles. The characteristics of internal force and lateral displacement of space double-row layout dislocation PHC piles were analyzed by FEM. The results show that the maximal bending moment of the one-row piles is nearly equal to the sum of the bending moment of the front piles and the bending moment of the back piles. The maximal displacement, the location of the maximal displacement, and the distributing form of displacement of the two retaining structures are all approximately sameness. The calculation accuracy can meet the design requirement. The method can simplify the calculation of the horizontal displacement and the bending moment in such structures while provide reference to the construction design of similar projects.

Ding J.,Changan University | Xian Y.,China Merchants Property Development Co. | Liu T.,Guangzhou Municipal Engineering Group
Advanced Materials Research | Year: 2012

With the development of urban construction, urban transit network has been gradually improved, but subway tunnel under its normal operation is inevitably affected by underground engineering activities such as foundation pit engineering. Based on the deep excavation near the effects of tunnel, the research content of 3d finite element analysis, from the qualitative research based on different situations of foundation excavation, is near to optimize the design and construction to provide the beneficial reference.

Ding J.,Changan University | Xian Y.,China Merchants Property Development Co. | Liu T.,Guangzhou Municipal Engineering Group
Advanced Materials Research | Year: 2012

The deep excavation of the foundation pit adjacent to the metro tunnel will change the stress state of the neighboring soil. And the deformation of tunnel will be induced which will cause impair to daily operation and the safety of metro tunnel. According to the practice of deep excavation neighboring the metro tunnel in Guangzhou, the main influence factors of deformation and stress of tunnel will be analyzed based on exaction conditions and field data. The conclusions will be benefit to similar projects. © (2012) Trans Tech Publications, Switzerland.

Wu L.,Shenzhen University | Lucas W.,Integrated Land Management Inc. | Liu J.,Shenzhen University | She N.,Shenzhen University | And 2 more authors.
International Low Impact Development Conference 2015 - LID: It Works in All Climates and Soils - Proceedings of the 2015 International Low Impact Development Conference | Year: 2015

This study discusses the innovative design of the gravel infiltration retention system for the underground parking garage of the phases 5 and 6 of Project of the Hills in Panyu District, Guangzhou City. The runoff from this project site is mainly managed by an innovative subsurface detention gravel system that provides stormwater storage during storm event and irrigation reuse during the dry season. This gravel infiltration retention system is generally provided by a 20-cm layer of coarse gravel placed over the garage under the landscaping soil surrounding the buildings. The areas not treated by the gravel infiltration retention system will be treated by a bioswale and a rain garden designed to remove nutrients. The synthetic 133-mm 4-hour storm event with 10-year return period was used to design the gravel infiltration retention system, rain garden, bioswale, and other pipeline conveyance. The 24-hour historical rainfall of 389 mm was used to evaluate these low-impact development facilities responses to an extreme event. The simulation results show that the gravel infiltration retention system have very large flood control performance. © 2015 American Society of Civil Engineers.

Xian Y.,Changan University | Xian Y.,China Merchants Property Development Co. | Liu B.,Changan University | Ding J.,Changan University
World Information on Earthquake Engineering | Year: 2011

Used the program ANSYS, finite element model of the ring-shape long-span tensile cable-membrane structure in Foshan Century Lotus Stadium is established to investigate its dynamic performance under seismic loading. The calculation methods include the response spectrum method and the time-history method. Results indicate that the structure' s vibration is mainly vertical vibration. The upper compression ring, the lower compression ring, and the truss web, all the components participate in vibration, and the structure' s dynamic characteristics are complex. The structure' s internal force and displacement are bigger under the seismic loading, and the harming degree of the seismic loading to the structure is not different if the directions of the earthquake waves are different. So the effects of the waves' direction and their combination should be considered. Made a comparison between the two calculation methods, the structure' s internal force has a similar trend, and its displacement also. For finding out the structure's dynamic characteristics completely, the time-history method should be firstly used.

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