scholarly journals Model Test Research on the Influence of Gate Blocking in Siltation Environment

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Hua Li ◽  
Yifeng Wang ◽  
Jingyu Zhang ◽  
Liangpeng Wan ◽  
Qiao Jiang ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Model Test ◽  
Significant Influence ◽  
High Water ◽  
Deep Hole ◽  
Analysis Model ◽  
Pull Out ◽  
Test Study ◽  
Similarity Ratio ◽  
Pulling Force

Aiming at the clogging problems encountered in the operation of deep-hole gates in high water level reservoirs and dams, this paper carried out a model test study on the influence of different materials and different siltation environments on the lifting of the gates and analyzed the rules of the effects of blockages in different siltation environments. An analysis model of the pull-out force of the gate (blocked object) considering the siltation environment was proposed in an innovative way and the similarity ratio relationship was verified. The results of the study show that (1) the size and time of the siltation and other factors have a significant influence on the pulling force of the blocked object. It increases with the increase of the siltation area. The longer the siltation goes on, the greater the pulling force will be. (2) As the similarity ratio n increases, the calculation result of the analysis model is closer to the target value n 2 and it indicates that the theoretical model is reliable. The research results of this paper can provide certain guidance for deep-hole siltation dispatch to ensure project safety.

Laboratory Model Test Study of Tunnel Anchor

2014 ◽  
Vol 1065-1069 ◽  
pp. 333-336
Author(s):  
Bing Shen ◽  
Sai Qiong Long ◽  
Jun Chen ◽  
Yong Bing Li
Keyword(s):  
Model Test ◽  
Shear Failure ◽  
Failure Surface ◽  
Tensile Failure ◽  
Laboratory Model ◽  
Pull Out ◽  
Test Study ◽  
Cable Force ◽  
Anchor Design ◽  
Laboratory Model Test

A laboratory model test of tunnel anchor was conducted to investigate its pullout mechanism and bearing capacity. Surface and rock deformation, strain and stress were measured during the entire model test process. The results show that: under pull out load, tensile failure first occurs in top surface rock near the anchor, then shear failure occurs in anchor-rock interface and rock around the anchor. The failure surface is inverted cone from the anchor bottom. Under 50 times design cable force tunnel rock is in elastic stage, suggesting that current tunnel anchor design is quite conservative and can be further optimized.

A Model Test Study on the Effect of the Stern Interceptor for the Reduction of the Resistance and Trim Angle for Wave-piercing Hulls

2015 ◽  
Vol 52 (6) ◽  
pp. 485-493 ◽  
Author(s):  
Dae Hyuk Kim ◽  
Inn-Duk Seo ◽  
Key-Pyo Rhee ◽  
Nakwan Kim ◽  
Jin-Hyung Ahn
Keyword(s):  
Model Test ◽  
Test Study

Model test study on monitoring dynamic process of slope failure through spatial sensor network

2015 ◽  
Vol 74 (4) ◽  
pp. 3315-3332 ◽  
Author(s):  
Ping Lu ◽  
Hangbin Wu ◽  
Gang Qiao ◽  
Weiyue Li ◽  
Marco Scaioni ◽  
...  
Keyword(s):  
Sensor Network ◽  
Model Test ◽  
Dynamic Process ◽  
Slope Failure ◽  
Test Study

Model test study on single and group under-reamed piles in sand under compression and tension

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Mantu Majumder ◽  
Debarghya Chakraborty ◽  
Vishal Kumawat
Keyword(s):  
Model Test ◽  
Test Study

Pengaruh Kualitas Pelayanan, Harga, dan Promosi Terhadap Kepuasan Pelanggan pada PT. Benua Trans Maju Bersama Cabang Medan

2021 ◽  
pp. 88-93
Author(s):  
Nurmaidah Ginting ◽  
Mila sari Br Ginting ◽  
, Ine Selvia Br Tarigan
Keyword(s):  
Regression Analysis ◽  
Data Analysis ◽  
Customer Satisfaction ◽  
Service Quality ◽  
Significant Influence ◽  
Quantitative Research ◽  
Analysis Model ◽  
Validity And Reliability ◽  
Normality Test ◽  
Sample Test

in this study is to find out how the influence of service quality, price and promotion on customer satisfaction with the aim of testing and analyzing the effect of service quality, price and promotion on customer satisfaction at PT. Benua Trans Maju Bersama Cabang Medan. The research was started in October 2020 – May 2021. In this study, the researcher used quantitative research techniques with the type of research being descriptive quantitative and the nature of the research was descriptive explanatory research. The population in this study were all customers has 223 customers. where validity and reliability were first tested in order to determine whether a questionnaire was valid or not, and researchers did it to 30 customers and the rest were 143 customers as a sample test. Then it is processed using the classical assumption test which includes: normality test, multicollinearity test, and heteroscedasticity test. The data analysis model in this study uses multiple regression analysis. The conclusion from the results of this study is that there is a service quality partially positive and significant effect on customer satisfaction. The price partially positive and significant effect on customer satisfaction. Promotion positive and significant effect on customer satisfaction Simultaneously the variables of service quality (X1), price (X2) and promotion (X3), there is a positive and significant influence on customer satisfaction (Y).

scholarly journals Model Test of the Reinforcement of Surface Soil by Plant Roots under the Influence of Precipitation

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Hengxing Wang ◽  
Yulong He ◽  
Zufeng Shang ◽  
Chunpeng Han ◽  
Yilu Wang
Keyword(s):  
Water Content ◽  
Model Test ◽  
Surface Soil ◽  
Plant Root ◽  
Root Systems ◽  
Reinforced Soil ◽  
Plant Roots ◽  
Interfacial Friction ◽  
Negative Power ◽  
Pull Out

We present the results of the reinforcement of plant root systems in surface soil in a model test to simulate actual precipitation conditions. In the test, Eleusine indica was selected as herbage to reinforce the soil. Based on the various moisture contents of plant roots in a pull-out test, a fitting formula describing the interfacial friction strength between the roots and soil and soil moisture content was obtained to explain the amount of slippage of the side slope during the process of rainfall. The experimental results showed that the root systems of plants successfully reinforced soil and stabilized the water content in the surface soil of a slope and that the occurrence time of landslides was delayed significantly in the grass-planting slope model. After the simulated rainfall started, the reinforcement effect of the plant roots changed. As the rainfall increased, the interfacial friction between the roots and the soil exhibited a negative power function relationship with the water content. These conclusions can be used as a reference for the design of plant slope protection and reinforcement.

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