scholarly journals Applicability of settlement prediction method to peaty ground

2016 ◽  
Vol 56 (1) ◽  
pp. 144-151 ◽  
Author(s):  
Hirochika Hayashi ◽  
Satoshi Nishimoto ◽  
Takahiro Yamanashi
Keyword(s):  
Prediction Method ◽  
Settlement Prediction

Ground Settlement Prediction Model and its Application for Tunneling Engineering above Mined-Out Regions

2012 ◽  
Vol 524-527 ◽  
pp. 592-597
Author(s):  
Shu Ren Wang ◽  
Hai Qing Zhang
Keyword(s):  
Field Data ◽  
Prediction Method ◽  
High Accuracy ◽  
Measured Data ◽  
Grey Model ◽  
Hyperbolic Model ◽  
Ground Settlement ◽  
Settlement Prediction ◽  
Tunneling Engineering ◽  
Huge Challenge

Although many types of curve fitting methods were used in ground settlement prediction, it is due to every prediction method was not perfect, they have some defects and shortcomings to some extent and ground settlement prediction be up against huge challenge. Usher model, being used for economic and resources prediction, is introduced to ground settlement prediction as a new method, and its mathematics features are also analyzed. After comparative analysis, Origin software is selected for parameters solution of Usher model with an explanation of the solving process. Based on the Shipogou tunnel project which through the mined-out regions in Qingdao-Yinchuan highway, the Usher model for ground settlement is established combining to the field data, of which the parameters are solved with the user-defined function and nonlinear tool of Origin. The predicting results being compared with that of grey model and hyperbolic model, it shows that Usher model is of good adaptability, high accuracy, simple and coinciding well with measured data.

scholarly journals Stability Control of Staged Filling Construction on Soft Subsoil Using Hyperbolic Settlement Prediction Method: A Case Study of a Tidal Flat in China

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Fei Yu ◽  
Shichang Li ◽  
Zhangjun Dai ◽  
Jian Li ◽  
Shanxiong Chen
Keyword(s):  
Tidal Flat ◽  
Lateral Displacement ◽  
Prediction Method ◽  
In Situ Monitoring ◽  
Displacement Rate ◽  
Ground Settlement ◽  
Settlement Prediction ◽  
Settlement Time ◽  
Soft Subsoil

An improved method, which combines in situ measured settlement data, hyperbolic method, and deep lateral displacement rate, is presented in this study to predict the consolidation and stability of the ground, which can be used in conducting staged filling construction on soft subsoil. A case history of a highway embankment construction in a tidal flat with thick mucky clay is studied in Xia Pu, China. Preloading with the prefabricated vertical drain method is adopted to accelerate the consolidation of a subgrade. The field behavior of soft ground under filling load is observed through in situ monitoring sensors in four typical sections. The final ground settlement in each stage is determined using the field monitoring data based on the hyperbolic settlement prediction method. For each stage of graded filling load, the ground settlement with a strain consolidation degree of 95% is defined as the standard settlement, and the corresponding settlement time is set as the standard settlement time. The preloading period is estimated according to the standard settlement time. The deep lateral displacement rate of the ground is monitored to control the stability of the foundation and recommended to guide the embankment construction. Results indicate that the presented method can predict the preloading time of graded filling, reduce the frequency of observation, and ensure the consolidation and stability of the ground.

The Application of Gray Theory on Predicting the Settlement of High Embankment

2013 ◽  
Vol 671-674 ◽  
pp. 1272-1276
Author(s):  
Ju Jin ◽  
Yuan Ming Dou ◽  
Qi Nan Li
Keyword(s):  
Prediction Method ◽  
Normal Operation ◽  
Dynamic Prediction ◽  
Settlement Prediction ◽  
The Road ◽  
Gray Theory ◽  
Operation And Maintenance ◽  
Predicted Model ◽  
Strict Requirement ◽  
The Stability

Stability of the road embankment is the foundation of the highway normal operation and maintenance, so there is strict requirement of road subgrade settlement for the highway. This article uses the gray theory to predict Cheng Chi high embankment construction settlement and builds a predicted model and tests the model’s accuracy. The results of settlement prediction are under the limits, so the stability of the road subgrade is good. This dynamic prediction method can be used on prediction of the settlement of high embankment and it’ll direct the operation and ensure the maintenance safety.

Dynamic Design Height of Embankment Preloading Soil in Dongting Lake District

2012 ◽  
Vol 204-208 ◽  
pp. 452-456
Author(s):  
You Yun Li ◽  
Zhen Yi ◽  
Zhong Shan Liang
Keyword(s):  
Prediction Method ◽  
Least Square Method ◽  
Dongting Lake ◽  
Least Square ◽  
Computational Method ◽  
Lake District ◽  
Factors Affecting ◽  
Settlement Prediction ◽  
Consolidation Coefficient ◽  
Degree Of Consolidation

A new computational method of preloading the earthwork has been proposed in this paper. Firstly, the various factors affecting the computed method for the foundation of the average degree of consolidation have been analyzed. Secondly, the settlement prediction method has been described according to the settlement to calculate the degree of consolidation. Then the consolidation coefficient has been calculated according to the least square method. The computed algorithm compute the preloading height based on the Takagi Shunsuke method and the measured data is presented. Finally, two examples illustrate the validity and the feasibility of the computed method in this paper.

Fatigue Life Analysis of Storage Tanks In-Service Based on Exponential Curve Settlement Prediction Model

2018 ◽  
Author(s):  
Delin Zhang ◽  
Zhiping Chen ◽  
You Li
Keyword(s):  
Fatigue Life ◽  
Prediction Model ◽  
Prediction Method ◽  
Element Model ◽  
Contact Condition ◽  
Storage Tanks ◽  
Settlement Prediction ◽  
Structural Fatigue ◽  
Exponential Curve ◽  
Fatigue Life Analysis

In order to study the structural fatigue safety of in-service fixed roof storage tanks after uneven settlement, an exponential curve method of settlement prediction has been constructed. A finite element model based on the contact condition between the elastic ring beam foundation and the tank base was also proposed. On the basis of above, a fatigue life prediction method of in-service storage tanks based on the settlement prediction model has been established. Combined with the engineering example of an in-service tank, the structural fatigue safety under the actual uneven settlement was analyzed. The results indicate that the trend of foundation settlement with time could be predicted accurately and the contact condition between base and foundation could be simulated simultaneously. Subsequently, the in-service tank’s structural fatigue life under the uneven settlement could be predicted.

scholarly journals A Prediction Method for Postconstruction Settlement of Pile-Soil Composite Subgrade Based on Fuzzy Comprehensive Evaluation

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Hao Shan ◽  
Guanghui Jiang ◽  
Yajing Chang ◽  
Junli Cheng ◽  
Baoning Hong ◽  
...  
Keyword(s):  
Comprehensive Evaluation ◽  
Soft Soil ◽  
Prediction Method ◽  
Fuzzy Comprehensive Evaluation ◽  
Evaluation Index ◽  
Normal Distribution Function ◽  
Index Set ◽  
Settlement Prediction ◽  
Variation Range ◽  
Factor Index

This paper presents a postconstruction settlement prediction method for pile-soil composite subgrade based on the multilevel fuzzy comprehensive evaluation principle. In this method, the variation range of postconstruction settlement can be obtained from a simple calculation based on the basic data of actual engineering. Firstly, according to the characteristics of influencing factors in the construction of soft soil subgrade, the evaluation index set and two-level factor index sets were selected. The grading standards of the evaluation index and factor index were determined according to the allowable value of the standard and the numerical simulation results. Secondly, each factor index was standardized, and the normal distribution function in the form of exponential was used to construct the standard membership function for the first and second factor indexes. Finally, the comprehensive evaluation matrix of postconstruction settlement of composite subgrade was constructed based on the entropy weight method. The variation range of postconstruction settlement was predicted by the principle of maximum membership. The example analysis shows that the predicted results of the prediction method and the field measurement method are in good agreement, indicating that the proposed method can realize the postconstruction settlement prediction of composite subgrade, and the results are more accurate and more instructive.

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