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Consistency Guarantees for Professional Appraisal of Geotechnical Engineering Design under Market Leading and Deciding

Jian-ye Zheng

Frontiers of Engineering Management 2015, Volume 2, Issue 1, Pages 82-85 doi: 10.15302/J-FEM-2015012

Abstract: In an open peer review refereeing a retaining and protection structure design of building foundation

Keywords： peer review foundation pit excavation retaining and protection structure design introduction

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Self-centring segmental retaining walls—A new construction system for retaining walls

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 980-1000 doi: 10.1007/s11709-021-0737-5

Abstract: This paper reports on an experimental study on a new self-centring retaining wall system.Four post-tensioned segmental retaining walls (PSRWs) were experimentally tested.The results showed that such PSRWs are structurally adequate for water retaining structures.Results suggest that this newly developed self-centring retaining wall can be a suitable structural system

Keywords： retaining wall segmental precast concrete unbonded post-tensioning water retaining wall seawall

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A Study on Project of Land-creation by Sand Retaining in Three Gorges Reservoir

Han Qiwei

Strategic Study of CAE 2003, Volume 5, Issue 5, Pages 31-34

Abstract: The proposals of “large protection” and “small protection” schemes for reducingA scheme of land creation by sand retaining and water sluicing has been proposed by the author.

Keywords： inundated area protection water discharge and silt deposit land reclamation

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Seismic analysis of semi-gravity RC cantilever retaining wall with TDA backfill

Il-Sang AHN, Lijuan CHENG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4, Pages 455-469 doi: 10.1007/s11709-017-0392-z

Abstract: The seismic behavior of Tire Derived Aggregate (TDA) used as backfill material of 6.10 m high retainingThe retaining walls were semi-gravity reinforced concrete cantilever type.under the Takatori earthquake, the TDA-backfill model developed substantially large displacement in the retainingIf an acceleration sensitive structure is placed on the surface of the backfill, the TDA backfill may

Keywords： TDA (Tire Derived Aggregate) scrap tires retaining wall seismic analysis Finite Element Analysis

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Nitrogen-retaining property of compost in an aerobic thermophilic composting reactor for the sanitary

Fan BAI, Xiaochang WANG,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2, Pages 228-234 doi: 10.1007/s11783-010-0022-7

Abstract: Aerobic composting is a method for the sanitary disposal of human feces as is used in bio-toilet systems. As the products of composting can be utilized as a fertilizer, it would be beneficial if the composting conditions could be more precisely controlled for the retention of fecal nitrogen as long as possible in the compost. In this study, batch experiments were conducted using a closed aerobic thermophilic composting reactor with sawdust as the bulk matrix to simulate the condition of a bio-toilet for the sanitary disposal of human feces. Attention was paid to the characteristics of nitrogen transformation. Under the controlled conditions of temperature at 60°C, moisture content at 60%, and a continuous air supply, more than 70% fecal organic removal was obtained, while merely 17% fecal nitrogen loss was observed over a two-week composting period. The nitrogen loss was found to occur mainly in the first 24 h with the rapid depletion of inorganic nitrogen but with an almost unchanged organic nitrogen content. The fecal NH–N which was the main component of the inorganic nitrogen (>90%) decreased rapidly in the first day, decreased at a slower rate over the following days, and finally disappeared entirely. The depletion of NH–N was accompanied by the accumulation of NH gas in the ammonia absorber connected to the reactor. A mass balance between the exhausted NH gas and the fecal NH–N content in the first 24 hours indicated that the conversion of ammonium into gaseous ammonia was the main reason for nitrogen loss. Thermophilic composting could be considered as a way to keep a high organic nitrogen content in the compost for better utilization as a fertilizer.

Keywords： nitrogen retention composting reactor human feces aerobic thermophilic fertilizer

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HIGH QUALITY DEVELOPMENTAL APPROACH FOR SOIL AND WATER CONSERVATION AND ECOLOGICAL PROTECTION ON THE

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 4, Pages 501-511 doi: 10.15302/J-FASE-2021425

Abstract:

The Loess Plateau is the core area in the Yellow River basin for implementing environmental protectionerosion and reduced flow of sediment into the Yellow River, continual optimization of the industrial structure

Keywords： ecological management high quality development industrial structure soil erosion soil and water

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Recent advances in geosynthetic-reinforced retaining walls for highway applications

Jie HAN, Yan JIANG, Chao XU

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 2, Pages 239-247 doi: 10.1007/s11709-017-0424-8

Abstract: Geosynthetic-reinforced retaining (GRR) walls have been increasingly used to support roadways and bridge

Keywords： bridge geosynthetic highway reinforced wall

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The Strategy of TC 3.0: A Revolutionary Evolution in Trusted Computing

Shen Changxiang,Zhang Dawei and Liu Jiqiang,Ye Heng, Qiu Shuo

Strategic Study of CAE 2016, Volume 18, Issue 6, Pages 53-57 doi: 10.15302/J-SSCAE-2016.06.011

Abstract: problems, and future strategies of the traditional defense system and analyzes issues in the current protectionstructure.

Keywords： trusted computing (TC) 3.0 active defense active immunity multi-level protection protection structure

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Implement and Innovate Environmental Protection Measures, Promote Green Protection of Cultural Relics

Fu-qing Liang,Yong-ping Sun

Frontiers of Engineering Management 2014, Volume 1, Issue 4, Pages 330-335 doi: 10.15302/J-FEM-2014055

Abstract: The subject is implementing and innovating environmental protection measures, and promoting green protection

Keywords： environmental science the Three Gorges cultural relics innovate environmental protection measures greenprotection

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Multi-scale investigation of active failure for various modes of wall movement

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 961-979 doi: 10.1007/s11709-021-0738-4

Abstract: Retained backfill response to wall movement depends on factors that range from boundary conditions to the geometrical characteristic of individual particles. Hence, mechanical understanding of the problem warrants multi-scale analyses that investigate reciprocal relationships between macro and micro effects. Accordingly, this study attempts a multi-scale examination of failure evolution in cohesionless backfills. Therefore, the transition of retained backfills from at-rest condition to the active state is modeled using the discrete element method (DEM). DEM allows conducting virtual experiments, with which the variation of particle and boundary properties is straightforward. Hence, various modes of wall movement (translation and rotation) toward the active state are modeled using two different backfills with distinct particle shapes (spherical and nonspherical) under varying surcharge. For each model, cumulative rotations of single particles are tracked, and the results are used to analyze the evolution of shear bands and their geometric characteristics. Moreover, dependencies of lateral pressure coefficients and coordination numbers, as respective macro and micro behavior indicators, on particle shape, boundary conditions, and surcharge levels are investigated. Additionally, contact force networks are visually determined, and their influences on pressure distribution and deformation mechanisms are discussed with reference to the associated modes of wall movement and particle shapes.

Keywords： discrete-element modelling granular materials retaining walls particle shape arching

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Seismic effects on reinforcement load and lateral deformation of geosynthetic-reinforced soil walls

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4, Pages 1001-1015 doi: 10.1007/s11709-021-0734-8

Abstract: Current design methods for the internal stability of geosynthetic-reinforced soil (GRS) walls postulate seismic forces as inertial forces, leading to pseudo-static analyses based on active earth pressure theory, which yields unconservative reinforcement loads required for seismic stability. Most seismic analyses are limited to the determination of maximum reinforcement strength. This study aimed to calculate the distribution of the reinforcement load and connection strength required for each layer of the seismic GRS wall. Using the top-down procedure involves all of the possible failure surfaces for the seismic analyses of the GRS wall and then obtains the reinforcement load distribution for the limit state. The distributions are used to determine the required connection strength and to approximately assess the facing lateral deformation. For sufficient pullout resistance to be provided by each reinforcement, the maximum required tensile resistance is identical to the results based on the Mononobe–Okabe method. However, short reinforcement results in greater tensile resistances in the mid and lower layers as evinced by compound failure frequently occurring in GRS walls during an earthquake. Parametric studies involving backfill friction angle, reinforcement length, vertical seismic acceleration, and secondary reinforcement are conducted to investigate seismic impacts on the stability and lateral deformation of GRS walls.

Keywords： geosynthetics reinforced soil retaining walls seismic performance

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CROP PROTECTION OPENS UP NEW ERA OF CONSERVATION AND UTILIZATION OF GREEN OPTIONS

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 1, Pages 1-3 doi: 10.15302/J-FASE-2021431

Abstract: Therefore, to solve the problem of crop pests and diseases, suitable green crop protection methods havedocumenting the history of research and application, Chinese laws and regulations related to plant protection

Field management is a traditional conservation agriculture technique on plant protection such

Pesticides are widely used in the crop protection.Using a structure-based drug design strategy, Zheng et al.

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Bioengineering protection mechanism of city rock slope and its laboratory test

Desong JIANG, Minghua ZHAO, Chong JIANG,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 4, Pages 414-421 doi: 10.1007/s11709-009-0055-9

Abstract: Based on the features of rock slope bioengineering protection, the ecology protection mechanism of theFurthermore, the indoor model experiment of urban crag rock slope ecology protection was designed andThe application results also show that the effect of geocell structure is the best one followed by the

Keywords： indoor engineering project protection mechanism different runoff lagging

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Challenge and Innovation in Sutong Bridge Foundation Proje ct

You Qingzhong,Dong Xuewu,Wu Shouchang

Strategic Study of CAE 2007, Volume 9, Issue 6, Pages 22-26

Abstract: Bridge' s super-large and deep-pile groups ; Permanent collision facilities consisting of collision structureand 5 000 ton steel cofferdam which is lowered as a whole; Permanent scour protection.

Keywords： Sutong Bridge construction platform steel cofferdam collision structure lowering as awhole permanentscour protection

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Game Theory Analysis of Marine Rights Protection

Wang Lei, Chen Hua, Kang Meize, Ma Xiaochuan

Strategic Study of CAE 2019, Volume 21, Issue 6, Pages 80-86 doi: 10.15302/J-SSCAE-2019.06.015

Abstract:

This study discusses marine rights protection from the perspective ofIt introduces the role of marine rights protection in handling marine disputes, as well as the nature, direction, and elements of the game in China’s marine rights protection.To this end, this study categorizes marine rights protection into three basic game processes, i.e., entryIt is concluded that improving technological means for marine rights protection can effectively change

Keywords： marine rights protection game theory marine rights protection technology United Nations Convention