Entity

Time filter

Source Type


Lu Y.,Shenzhen Investigation and Research Institute CO.
Journal of Geomatics | Year: 2010

Based on the design and implementation of Shenzhen land acquisition and resettlement information management system, we propose the overall objective of it and depicted the process of building a functional land acquisition and resettlement information management system.


Song J.,Jilin University | Wang Q.,Jilin University | Chen H.-E.,Jilin University | Sun T.,Tianjin Institute of Geotechnical Investigation and Surveying | And 2 more authors.
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2010

The dredger fill foundation is popularly treated by vacuum preloading. But the drain pipes are always clogged by fine particles which cause the construction to be delayed. In order to improve the efficiency of the dredger fill consolidation, a laboratory test was designed to study consolidation law under the comditions of gravitational drainage clogged combined with vacuum preloading method for heavy clay and saliniferous dreder fill. Engineering geology characteristics of heavy clay and saliniferous dredger fill was analyzed. And the small cubic crystals overlapped on the surface of the particles were identified by soluble salts test and X-ray diffraction approach. When the microstructure was studied by scanning electronic microscope(SEM) during the process of consolidation, it was indicated that with the decreased of moisture content in heavy clay and saliniferous dredger fill, the number of halite was running off by water drainage in the process of gravitational drainage stage. So the seepage channels became instability due to the unstable microstructure. Furthermore, particle fractal dimension was taken as the microstructure index to determine the characteristics of the heavy clay and saliniferous dredger fill on the process of consolidation. The results showed that particle fractal dimension was increased by consolidation as the result of the reduction of the number of cubic crystals flowed off by water drainage.


Song F.,Changan University | Song F.,Chongqing Jiaotong University | Li Y.-L.,Changan University | Zhang K.,Shenzhen Investigation and Research Institute CO. | Zhang L.-Y.,The 9th General Team of Airport Construction of China
International Journal of Earth Sciences and Engineering | Year: 2014

Geocell reinforced retaining walls have been widely used in civil engineering for the protection of slopes. In order to decrease the horizontal deformation and increase the safety factor of the wall, the lengths of geocells in some layers are extended in the backfill to serve as reinforcement. However, the optimum sectional form of the geocell reinforced retaining wall hasn’t been fully studied. In this paper, by employing the geotechnical FEM software Plaxis, the effects of the location and the length of lengthening geocell layers on the mechanical properties of the wall are investigated. Research results indicate that the safety factor of the wall is the biggest when the location of the lengthening geocell layer is about 1/3 of the wall height from the bottom of the wall bottom. If the number of the lengthening geocell layers maintains the same, the safety factor of the wall with the lengthening geocell layers locating at the lower part of the wall is bigger than that of the wall with the geocell bar strips placed at the upper part. Besides, when the length of the lengthening geocell layer equals about the wall height, the safety factor of the wall is the biggest. © 2014 CAFET-INNOVA TECHNICAL SOCIETY.


Song F.,Changan University | Song F.,Key Laboratory of Highway Construction and Maintenance Technology in Loess Region | Li Y.-L.,Changan University | Zhang L.-Y.,The 9th General Team of Airport Construction of China | Zhang K.,Shenzhen Investigation and Research Institute CO.
International Journal of Earth Sciences and Engineering | Year: 2014

As a new type of retaining structure, the geocell flexible retaining wall has a broad application prospect in the road slope protection. In this paper, based on the analysis of the results of centrifugal model tests and numerical simulation, the failure modes for geocell flexible retaining wall under different height-width ratios and soil strengths are investigated. On this basis, mathematical expression of failure modes of geocell flexible retaining wall with different height-width ratios and backfill strengths is formulated and corresponding sliding surfaces are also given. The results of this study can provide theoretical references for the design. © 2014 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.


Song F.,Chongqing Jiaotong University | Chen H.,Changan University | Xiao B.,Shenzhen Investigation and Research Institute CO. | Zhang L.-Y.,The 9th General Team of Airport Construction of China
International Journal of Earth Sciences and Engineering | Year: 2014

As a new type of retaining structure, the geocell two-stage retaining wall, has a broad application prospect in the road slope protection. However, its optimum section form has not been systematically investigated. In this paper, the effects of height proportion and the length of the overlapping part of the two stages on the horizontal displacement of the wall back, the size of the sliding wedge and the safety factor are investigated by employing the geotechnical FEM software Plaxis. The research results indicate that, when the proportion of the height of the lower stage in the total height of the wall and the length of the overlapping part of the two stages are small, the horizontal displacement of the wall back is small, the size of the sliding wedge and the safety facor are both large. Based on the analysis of numerical simulation results, the optimum sectional form of the geocell two-stage retaining wall is discussed. © 2014 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.

Discover hidden collaborations