Shanghai Shenyuan Geotechnical Engineering Co.

Shanghai, China

Shanghai Shenyuan Geotechnical Engineering Co.

Shanghai, China
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Liang Y.,Shanghai Shenyuan Geotechnical Engineering Co. | Shui W.,Huadong Architecture Design Co.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2015

Many geotechnical problems were encountered during the construction of high filling embankment on soft ground when next to buildings. Based on the construction of high filling embankment on soft ground which was next to building in Shanghai Chen Shan Botanical Garden, the paper describes the key problems encountered during the construction. The paper presents the solutions to the reduction of construction of high fillings' impact on the adjacent buildings, the design of retaining wall between the high fillings and buildings and the construction procedure of high fillings. An innovative retaining wall with pile-supported composite foundation and geogrid-reinforced fillings, which considering the time-space effect, was proposed and successfully applied in the project. ©, 2015, Editorial Office of China Civil Engineering Journal. All right reserved.


Feng S.-J.,Tongji University | Shui W.-H.,Shanghai Shenyuan Geotechnical Engineering Co. | Gao L.-Y.,Tongji University | He L.-J.,Shanghai Shenyuan Geotechnical Engineering Co. | Tan K.,Tongji University
Bulletin of Engineering Geology and the Environment | Year: 2010

The paper reports a study into the dynamic compaction of very coarse grained material placed over soft clays in a coastal reclamation area. It was found that higher energy levels are more effective than low impact energy levels, which can result in ground heave between impact points. Spectral analysis of surface wave (SASW) tests and plate load tests confirmed the effect of the dynamic compaction extended to at least 10 m, with no obvious weak layers identified. Following dynamic compaction, the allowable bearing capacity was >120 kPa. © 2009 Springer-Verlag.


Gao G.-Y.,Tongji University | Zhang B.,Tongji University | Li W.,Shanghai Shenyuan Geotechnical Engineering Co.
Yantu Lixue/Rock and Soil Mechanics | Year: 2012

In order to study the three-dimensional (3D) isolation vibration effectiveness of wave impeding block (WIB) in layered and vertical heterogeneous foundation under horizontal-rocking coupled excitation, a 3D semi-analytical boundary element method (BEM) model based on thin-layered method (TLM) efficiently to study the wave propagation in layered ground and BEM precisely to solve infinite domain problems is presented. The analysis is accomplished with this model, on which the Green's function is regarded as fundamental solution of a stratified half-space. Then the active isolation effectiveness of WIB is studied in layered and vertical heterogeneous foundation. The results show that the stratification parameter and the heterogeneity have significant influence on the vibration isolation effect of WIB, and the isolation vibration effectiveness of the upper stiff-layer and lower soft-layer ground is better than it of the upper soft-layer and lower stiff-layer ground.


Feng S.-J.,Tongji University | Shui W.-H.,Shanghai Shenyuan Geotechnical Engineering Co. | Tan K.,Tongji University | Gao L.-Y.,Tongji University | He L.-J.,Shanghai Shenyuan Geotechnical Engineering Co.
Journal of Performance of Constructed Facilities | Year: 2011

The dynamic compaction (DC) method is a versatile ground treatment technique with growing popularity. It is applicable to a wide variety of soil types and conditions, particularly sandy materials and granular fills. This study presents a case history of the dynamic compaction with a high energy level of 6,000 kNm on granular deposits at a site in China. The reclaimed site featured loose backfill with heterogeneity and saturated silt. In order to properly deal with such soil conditions and to optimize the DC design, field tests were conducted to determine the influencing factors in DC. Deformation tests were performed to ascertain the rational spacing of impacts and the optimal number of drops and to provide proofs to the adjustment of the original DC procedure. Monitoring of the pore water pressure helped obtain the time delay between passes. The approach to assess the depth of improvement was discussed based on interpretations of the spectral analysis of surface waves (SASW) test. Analysis of the SASW and plate-load tests demonstrated significant improvement in the soils at the site, with no obvious weak layers. Following dynamic compaction, the allowable ground-bearing capacity and the depth of improvement at the site were no less than 270kPa and 7.4m, respectively. © 2011 American Society of Civil Engineers.


Tang J.,Shanghai Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2012

For a super-deep excavation in Shanghai, the application of late-dismantling support in the design of retaining structures is introduced. The difficulties of the design and construction are analyzed, and the relevant solutions are given. A comparison among numerical simulations, theoretical results and engineering data shows that the results are close, and the monitoring data do not exceed the warning values. The influences of pit excavation on the surrounding environment can meet the requirements of specification. The design method is successfully used in this project and achieves satisfactory effects. It will provide some reference for the design and construction of similar projects.


Zhu X.-J.,Shanghai Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

The deformation caused by support dismantling may affect the security and stability of deep foundation pits and surroundings in soft ground. Based on the design and construction practices of a large number of deep foundation pits in soft soils, the treatment measures for controlling the deformation caused by support dismantling are introduced through support replacement. Multiple support replacement methods under special conditions and their characteristics, main design issues and application conditions are discussed. It will provide some reference to the design and construction of similar projects.


He C.,Shanghai Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

The calculation of heave of soldier piles resulted from the excavation of foundation pits is unavailable at present. The characteristics of force and displacement of soldier piles are analyzed. The relationship between the length of soldier piles and the depth of pit rebound is discussed. The depth of pit rebound in soft soils is defined. The Mindlin surface integration is employed to derive the method to calculate the pit rebound. According to the interaction between piles and surrounding soils, the method to calculate the heave of soldier piles is obtained. The relevant program is compiled. Based on deep excavation cases of metro and high-rise building on the inverse construction, the present method is evaluated and compared with measured data. The difference between calculations and measurements is discussed.


Liu Z.,Shanghai Shenyuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2010

The rebuilding and extension of the heritage buildings include two important sides. One is the foundation improvement of the old buildings, the other is the construction of new buildings. The problem of the former is that the original structures cannot be damaged during construction, and that of the latter is the difficulty in minimizing the influences on the old buildings during the deep excavation construction. Based on the successful case of Yifeng Building, the detail of how to reinforce the foundation of the old buildings, and how to design the construction of deep excavation of the new building under restriction of every aspect is introduced. This project is located at the Bund and is adjacent to several heritage buildings. Composite anchor jacked piles are applied to the rebuilding of the old buildings, and the top-down construction method is applied to the deep excavation of the new ones. It is shown that these techniques result in successful rebuilding of heritage buildings and surroundings. The successful application supplies some reference to similar projects in future.


Huang W.,Shanghai Shenyuan Geotechnical Engineering Co. | Liang Y.,Shanghai Shenyuan Geotechnical Engineering Co.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2015

It has important significance to analyze the stability of high loess slope, according to the characteristics of soil quality in loess area. Based on fuzzy mathematics theory, the variable fuzzy recognition model is established. The stability of high loess slope has been divided into five evaluation grades: stable, relatively stable, basically stable, relatively unstable and unstable. The factor set and the normalized weighting vector of indexes of fuzzy recognition model are determined. The indicator weights obtained are taken into the stability assessment sets of high loess slope to assess the stability of high loess slope. Programming with visual programming language MATLAB. The high loess slope in Yanan city is taken as an example. Analyze the stability of slope by using variable fuzzy recognition model and limit equilibrium method. The result shows that: the stability grade eigenvalue of this slope is 2.96, and its stability grade level is Ⅲ, this means that this slope is in the basically stable state, results are in agreement of two methods. Indicates that, the method is applicable to evaluate the stability of high loess slope. ©, 2015, Editorial Office of China Civil Engineering Journal. All right reserved.


Liang Y.-H.,Shanghai Shen Yuan Geotechnical Engineering Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2013

A systematic analysis is given for the scheme selection and mechanical characteristics of retaining structures with high filling adjacent to the buildings on soft ground. The critical technical problem is also summarized. A new type of composite retaining structure with pile-supported reinforced soils is put forward. It is successfully applied to the retaining structures for a typical project in Shanghai. The design principle and method may provide reference for similar projects.

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