scholarly journals Numerical Analysis of Light-weight Air Foamed Soils using Dredged Marine Clay for Soft Ground Improvement Method

2014 ◽  
Vol 15 (3) ◽  
pp. 5-13
Author(s):  
Gillim Yoon ◽  
Sunbin Kim
Keyword(s):  
Numerical Analysis ◽  
Ground Improvement ◽  
Soft Ground ◽  
Light Weight ◽  
Marine Clay ◽  
Improvement Method ◽  
Soft Ground Improvement

Decision Model of the Soft Ground Improvement Based on Improved Sugeno Fuzzy Integral

2012 ◽  
Vol 193-194 ◽  
pp. 740-747
Author(s):  
Yan Zhi Zhu ◽  
Chun Li Zhang
Keyword(s):  
Decision Model ◽  
Ground Improvement ◽  
Optimal Choice ◽  
Soft Ground ◽  
Fuzzy Integral ◽  
Decision Making Problem ◽  
Practical Engineering ◽  
Improvement Method ◽  
Qualitative Index ◽  
Soft Ground Improvement

In order to completely consider affects of various subjective and objective factors for decision of soft ground improvement, according to quantitative index and qualitative index influencing soft ground improvement, a fuzzy integral decision model about definitive set was presented, based on improved Sugeno fuzzy integral on the basis of fuzzy measure. A computer program for applying the model to solve multi-objective decision making problem was given. The feasibility of its model was verified through the optimal choice for decision of soft ground improvement in practical engineering. The given example shows this model can be successfully used to make decision about soft ground improvement method of the expressway. At the same time, the decisional model above is useful and effective for evaluating the other complicated systems.

Uplift and Settlement Prediction Model of Marine Clay Soil e Integrated with Polyurethane Foam

2019 ◽  
Vol 9 (1) ◽  
pp. 481-489
Author(s):  
D.C. Lat ◽  
I.B.M. Jais ◽  
N. Ali ◽  
B. Baharom ◽  
N.Z. Mohd Yunus ◽  
...  
Keyword(s):  
Polyurethane Foam ◽  
Clay Soil ◽  
Ground Improvement ◽  
Soft Soil ◽  
Soft Clay ◽  
Effective Thickness ◽  
Marine Clay ◽  
Uplift Pressure ◽  
Pu Foam ◽  
Improvement Method

AbstractPolyurethane (PU) foam is a lightweight material that can be used efficiently as a ground improvement method in solving excessive and differential settlement of soil foundation mainly for infrastructures such as road, highway and parking spaces. The ground improvement method is done by excavation and removal of soft soil at shallow depth and replacement with lightweight PU foam slab. This study is done to simulate the model of marine clay soil integrated with polyurethane foam using finite element method (FEM) PLAXIS 2D for prediction of settlement behavior and uplift effect due to polyurethane foam mitigation method. Model of soft clay foundation stabilized with PU foam slab with variation in thickness and overburden loads were analyzed. Results from FEM exhibited the same trend as the results of the analytical method whereby PU foam has successfully reduced the amount of settlement significantly. With the increase in PU foam thickness, the settlement is reduced, nonetheless the uplift pressure starts to increase beyond the line of effective thickness. PU foam design chart has been produced for practical application in order to adopt the effective thickness of PU foam within tolerable settlement value and uplift pressure with respect to different overburden loads for ground improvement works.

A new method of combination of electroosmosis, vacuum and surcharge preloading for soft ground improvement

2014 ◽  
Vol 28 (4) ◽  
pp. 511-528 ◽  
Author(s):  
Han-long Liu ◽  
Yun-liang Cui ◽  
Yang Shen ◽  
Xuan-ming Ding
Keyword(s):  
Ground Improvement ◽  
New Method ◽  
Soft Ground ◽  
Surcharge Preloading ◽  
Soft Ground Improvement

Research to build technological procedure for soft ground improvement using sea sand-cement-fly ash column

2020 ◽  
Vol 61 (HTCS6) ◽  
pp. 1-9
Author(s):  
Thinh Duc Ta ◽  
Phuc Dinh Hoang ◽  
Thang Anh Bui ◽  
Trang Huong Thi Ngo ◽  
Diu Thi Nguyen ◽  
...  
Keyword(s):  
Fly Ash ◽  
Load Capacity ◽  
Ground Improvement ◽  
Soft Soil ◽  
Soil Reinforcement ◽  
Soft Ground ◽  
Design Calculation ◽  
Sea Sand ◽  
Composite Ground ◽  
Soft Ground Improvement

Sea sand-cement-fly ash column technology for soft soil treatment is a new technology in the process of completing the theoretical basis, the experimental basis, and the construction of the ground treatment technological procedure. The paper presents the results of scientific research on design, calculation, construction, and acceptance of sea sand-cement-fly ash column. The scientific basis for the design of column is to consider the role of the column in composite ground, that is to use the column as soft ground improvement or soft soil reinforcement. The important parameters for the column design are: cement and fly ash content; column length; column diameter; number of columns; distance among columns; load capacity and settlement of composite ground. The sequence of steps of construction and acceptance of column includes: selection of construction equipment, preparation of construction sites, trial construction, official construction, evaluation of ground quality after treatment and preparation of document for acceptance.

Soft Ground Improvement—Theoretical, Experimental, Numerical and Field Studies

2019 ◽  
pp. 183-216
Author(s):  
Buddhima Indraratna ◽  
Pankaj Baral ◽  
Cholachat Rujikiatkamjorn ◽  
Thanh Trung Nguyen
Keyword(s):  
Ground Improvement ◽  
Field Studies ◽  
Soft Ground ◽  
Soft Ground Improvement

scholarly journals Experimental application of optimal depth of PVDs determination under vacuum loading condition

2016 ◽  
Vol 19 (1) ◽  
pp. 116-121
Author(s):  
Nhat Dai Vo ◽  
Viet Hoang Quoc Lam ◽  
Tuan Minh Pham
Keyword(s):  
Loading Condition ◽  
Ground Improvement ◽  
Soft Soil ◽  
Small Error ◽  
Soft Ground ◽  
Optimal Depth ◽  
Geological Feature ◽  
Experimental Application ◽  
Technical Requirements ◽  
Soft Ground Improvement

Viet Nam is one of the country that has a very soft and complicated geological feature. Therefore, how to economize cost but satisfy the standard and technical requirements in designing by selecting an appropriate method in building especially projects constructed on soft ground is always needed to consider and research continuouslly. In this paper, a method how to determine the optimal depth of PVDs under vacuum loading condition for soft ground improvement is presented and applied to specific case in 861 provincial street, Ward Cai Be, Tien Giang District. The soft soil includes two layers with total 12m thick and is allowed to drain on the top and bottom faces (double drainage). The result shows that the optimal depth of PVDs is about 10,5m with the small error of 0,7%

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