Zhejiang Guangchuan Engineering Consulting Co.

Hangzhou, China

Zhejiang Guangchuan Engineering Consulting Co.

Hangzhou, China
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Zou Y.,Water Control Bureau of Yuyao City | Zhang J.,Zhejiang Guangchuan Engineering Consulting Co. | Li G.,Zhejiang Guangchuan Engineering Consulting Co. | Shen Z.,Zhejiang Guangchuan Engineering Consulting Co. | And 2 more authors.
IOP Conference Series: Earth and Environmental Science | Year: 2017

Taking Yuyao city as the study area, using GIS technology to establish a database of soil ero-sion. Based on the database, soil erosion in the study area was Evaluated and the dynamic variation of soil erosion intensity was analyzed. The results showed that during the past ten years from 2004-2014, the overall situation of soil erosion in Yuyao city had improved, and the total area of soil erosion decreased year by year, with an average annual reduction rate of 3.3199 km2/a. But high intensity erosion area increased due to mining, quarrying, road building caused by. And some area had the evil trend, however the area was not large. In the process of the dynamic transition of erosion, the weakening area of erosion mainly came from the transition of slightly eroded area to non-apparently eroded area. the exacerbating erosion area mainly came from the transition of non-apparently eroded area to the slightly and moderately eroded area. © Published under licence by IOP Publishing Ltd.


Luo Y.J.,Zhejiang Guangchuan Engineering Consulting Co. | Tang D.Y.,Zhejiang Guangchuan Engineering Consulting Co.
Electric, Electronic and Control Engineering - Proceedings of the International Conference on Electric, Electronic and Control Engineering, ICEECE 2015 | Year: 2015

Based on ANSYS FEM software, a new-built sea dike across the existing submarine optical fibre cable was studied. The results showed that: in a reasonable arrangement of the construction process conditions, dike construction has little effect on the fiber optic cable; combination in extremely adverse conditions, when completed cable suffered a causeway maximum axial force of 5.9t, the maximum tensile strain 0.44%, were within the normal operating range of the cable; considering the sensitivity of the foundation soil parameters, the elastic modulus of the foundation soil 10% reduction in the calculation, the results show a causeway suffered when completed cable maximum axial force is 6.86t, the maximum tensile strain 0.51%, still less than the allowable value cable work. Calculation result of the analysis has a certain reference value for the coastal causeway across the submarine cable and pipeline protection design. © 2015 Taylor & Francis Group, London.


Shen X.,China Institute of Water Resources and Hydropower Research | Wu X.,Zhejiang Guangchuan Engineering Consulting Co. | Wu X.,Zhejiang Institute of Hydraulics and Estuary | Xie X.,China Institute of Water Resources and Hydropower Research | And 2 more authors.
Advances in Meteorology | Year: 2017

The monthly accumulated precipitation and monthly average temperature of 117 meteorological stations in Song-Liao River Basin (SLRB) were used to calculate the Standardized Precipitation Evapotranspiration Indices (SPEI) to analyze the drought characteristics, including long-term trends, drought affected area, climate abrupt change, intensive drought occurrence regions, and drought durations during 1964-2013 with the support of GIS. The Area Drought Severity (ADS), a comprehensive index, is proposed to assess both the variations of drought degree and the extent of the drought affected area. The results revealed that (1) the drought happening probability and degree are rising and the affected areas of all degrees of drought have an increasing trend during the last 50 years; (2) there is a climate abrupt change which occurred in around 1994, and the area with declining SPEI is larger than that with declining SPI, which could be due to the rising temperature after the climate abrupt change; (3) all degrees of drought occurrence probability increased, and the intensive drought occurrence regions altered from the northern SLRB to the southwestern SLRB after the climate abrupt change; (4) the drought duration increased from 1994, and the increased drought durations occurred in most parts of SLRB. © 2017 Xiaojing Shen et al.


Wang X.-F.,Zhejiang Guangchuan Engineering Consulting Co.
Electronic Journal of Geotechnical Engineering | Year: 2013

In situ monitoring plays an important role in the construction organization as one part of the information on construction. In the study reported in this paper we used three different methods namely the hyperbolic method, exponent method and Asaoka method. These methods are used to analyze the effect of the foundation treatment to forecast the final settlement and calculate the average degree of consolidation of the foundation through the in situ observation of foundation treatment. The study was done as part of an airport expansion project. At the same time this paper proposed one simplified calculation model based on the measured settlement and the stage loading method by Zeng Guoxi then calculated the degree of consolidation. Finally this paper made comparison with the result of the modeling calculation and the average degree of consolidation. The results showed this modeling method is reasonably accurate and feasible. © 2013, EJGE.


Chang X.,Zhejiang Water Conservancy and Hydropower College | Chengfa D.,Zhejiang Guangchuan Engineering Consulting Co.
Proceedings - 2nd IEEE International Conference on Advanced Computer Control, ICACC 2010 | Year: 2010

This paper deals with the application of least squares support vector regression (LS-SVR) with radial basis function (RBF) kernel in dam crack forecasting. In the process of LS-SVR, we performed the standard grid search and particle swarm optimization (PSO) to tune hyperparameters of LS-SVR. The results demonstrate that our PSO approach can identify optimal or near optimal parameters faster than the exhaustive grid search. Comparison with results from stepwise regression was also included, to evaluate the reliability of applying such a PSO method which avoids doing an exhaustive grid search. We found that our LS-SVR approach is promising in dam crack forecasting, however it cannot be used to extract the crack contributed by water pressure, temperature variation, and aging effect, respectively. © 2010 IEEE.


Shen Z.W.,Zhejiang Institute of Hydraulics and Estuary | Wang X.H.,Zhejiang Guangchuan Engineering Consulting Co. | Jin W.L.,Zhejiang Institute of Hydraulics and Estuary
Hydraulic Engineering II - Proceedings of the 2nd SREE Conference on Hydraulic Engineering, CHE 2013 | Year: 2014

In China, most of the offshore platform lied in the bohai sea, yellow sea and east China sea and south China sea, which is earthquake-prone area. Earthquake is devastating and unpredictable. It is important to assess the reliability of offshore jacket platforms subjected to seismic action. This paper presents the approach to calibrate of reliability of offshore jacket platform subjected to seismic action. The combination of loads are mainly investigated. The reliability of offshore jacket platform of QK18-1 in Bohai Bay related to 25-year reference period is 1.304, which is close to the conclusion of some existing researches. The results could provide significant reference for the design of offshore jacket platforms. © 2014 Taylor & Francis Group, London.


Shen Z.W.,Zhejiang Institute of Hydraulics and Estuary | Jin W.L.,Zhejiang University | Wang X.H.,Zhejiang Guangchuan Engineering Consulting Co.
Applied Mechanics and Materials | Year: 2013

Offshore jacket platforms under complicated and changeful ocean environments are subjected to various stochastic actions such as actions of wave, current, wind, ice, earthquake and their combinations. This paper presented the approach to calibrate of the reliability of the offshore jacket platform, and suggested all kinds of associated load cases. The combination of loads were mainly investigated. As an example, the reliability of offshore jacket platform of QK18-1 in Bohai Bay was verified. The result shows that the reliability of the offshore jacket platform related to 25-year reference period is between 2.7 and 3.39, which is close to the conclusion of some existing researches. This method would be used more widely for the design of offshore jacket platforms. © (2013) Trans Tech Publications, Switzerland.


Shen Z.W.,Zhejiang Institute of Hydraulics and Estuary | Wang X.H.,Zhejiang guang chuan engineering consulting co.
Advanced Materials Research | Year: 2014

Today to estimate the size of the rainfall on soil erosion comprehensive index is rainfall erosion force.This paper, by using routine weather stations rainfall data, such as the daily rainfall data of rainfall erosion force simplified model is set up, estimate rainfall erosion force, on the soil erosion quantitative forecast and science develop soil and water conservation measures is particularly important. © (2014) Trans Tech Publications, Switzerland.


Shen Z.-W.,Zhejiang Institute of Hydraulics and Estuary | Wang X.-H.,Zhejiang Guangchuan Engineering Consulting Co. | Jin W.-L.,Zhejiang University
Advanced Materials Research | Year: 2014

When more than one loads act on a structure, the combination of stochastic loads is generally considered in the design of the structure, Based on the theoretical derivation and numerical calculation analysis to the process of two common loads in Poisson square wave and Poisson impulse this paper presents the combination method of loads.i.e. The maximum intensity function of load combination is expressed by the cumulative distribution function in the limit state design. In addition, the result calculated during the limit state design is compared with those calculated by Turkstra and Monte Carlo methods and the analytical results show that the method proposed in this paper is feasible in the calculation of load combination. © (2014) Trans Tech Publications, Switzerland.


Hu D.-C.,Changjiang River Scientific Research Institute | Chi L.-Z.,Zhejiang Guangchuan Engineering Consulting Co. | Yang Q.,Zhejiang Institute of Hydraulics and Estuary | Wang M.,Changjiang River Scientific Research Institute
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | Year: 2015

To illuminate the development mechanics of a reservoir scouring funnel, the sediment deposition before a dam was simulated using a 3D numerical model. The 3D model used an unstructured, sigma grid, which fitted well complex boundaries of real rivers. The θ semi-implicit method, Eulerian-Lagrangian method were combined to discretize the governing equations, which made the computation stable. The parameters of the 3D model were determined by comparing the simulated results of the 1D and 3D models. The sedimentation process before the orifices of a reservoir was then simulated by the 3D model with calibrated parameters. The process of 20-year sediment transport and deposition before the dam of the Pakistan Karot reservoir was simulated, and the distributions of the flows, sediment concentration and deposition were obtained. The results indicate that: (1) in a reservoir, the sediment is transported and deposits in the main channel, at two sides of which intensive depositions of refraction sediment-carrying flows occur along the horizontal circulation before orifices; (2) with the aging of the reservoir, the high floodplain and deep channel are gradually advanced towards the orifices, the scouring funnel is then formed between the above intensive depositions and before the orifices. ©, 2015, Zhejiang University. All right reserved.

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