scholarly journals Ground Improvement By Using Coir Geo-Textile

2021 ◽  
pp. 353-359
Author(s):  
R. A. Joshia Issac ◽  
A. Bharathu ◽  
Dr. K. Ramadevi
Keyword(s):  
Aspect Ratio ◽  
Ground Improvement ◽  
Soil Reinforcement ◽  
Percentage Increase ◽  
Traffic Conditions ◽  
Subgrade Soil ◽  
Percentage Improvement ◽  
Optimum Height ◽  
Maximum Improvement ◽  
Pavement Structure

For the design of pavement structure the subgrade soil and its properties are important as it gives adequate support to the pavement. To increase the life of pavement the subgrade must be able to support loads transmitted from pavement structure without excessive deformation under adverse climatic and traffic conditions. For using the soil as a good quality pavement material, it is a well-known fact that all soils do not possess all the desirable qualities. The subgrade performance of such soils should be increased by several modification techniques, when such soils cannot be replaced. Among that providing reinforcement to improve subgrade soil nowadays is widely adopted. Nowadays many reinforcing techniques are used to reinforce the soil, among that coir geotextile is most widely used. As it is a natural geotextile it needs treatment to improve the durability. In this study woven coir geotextile are used as soil reinforcement to improve the subgrade soil. The improvement in CBR value when coir geotextile placed at different depth in CBR mould is studied. The coir geocells with an aspect ratio of 0.75, 1 and 1.33 is used. The maximum improvement in CBR value is obtained when geotextile is placed at 1/3H. The CBR value improved when treated coir geotextile is used and the percentage improvement is 66.8% for coir geotextiles placed 1/3H and the percentage increase for treated coir geocells when placed at 1/3H is 37.5%. The optimum height of coir geocells is obtained at an aspect ratio of 1.

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.

scholarly journals The Influence of the Carbo-Glass Geogrid-Reinforcement on the Fatigue Life of the Asphalt Pavement Structure / Wpływ Zbrojenia Siatka Weglowo–Szklana Na Trwałosc Zmeczeniowa Asfaltowej Nawierzchni Drogowej

2012 ◽  
Vol 58 (1) ◽  
pp. 97-113 ◽  
Author(s):  
J. Górszczyk ◽  
S. Gaca
Keyword(s):  
Fatigue Life ◽  
Asphalt Pavement ◽  
Field Tests ◽  
Traffic Loading ◽  
Geogrid Reinforcement ◽  
Traffic Conditions ◽  
Pavement Structure ◽  
Number Of Cycles ◽  
The One ◽  
Stress Fatigue

Abstract This paper describes the analyses of the fatigue life of the asphalt pavement reinforced with geogrid interlayer under traffic loading. Finite Element ANSYS package with using nCode applications, as well as macros specially designed in APDL programming script and VBA were used to model the considered problem. Our analysis included computation of stress, fatigue life, damage matrix and rainflow matrix. The method applied was the one of fatigue calculation: stress - number of cycles in short S-N. On the basis of the performed high cycle fatigue analysis, the influence of the location of the used geogrid and of its bond with asphalt layers on the fatigue life and the work of the asphalt pavement structure were determined. The study was carried out for three temperature seasons i.e. spring and fall (assumed as one season), winter and summer. The variability of the traffic conditions were taken into account by assuming weekly blocks of traffic loading. The calculations were made using the real values of loading measured in field tests on the German highways by means of HS-WIM weighing system. As a result of the performed tests, it was proved that the use of geogrid-reinforcement may prolong the fatigue life of the asphalt pavement. However, it is required that: the geogrid should be located in the tension zone as low as possible in the structure of the asphalt layers. Moreover, it is necessary to provide high stiffness of the bond between the geogrid and the asphalt layers.

scholarly journals Numerical Analysis of Soil Reinforcement using Geocell infilled with Quarry Dust Powder

2021 ◽  
Vol 2070 (1) ◽  
pp. 012189
Author(s):  
K Adithan ◽  
AC Neethi Chandra ◽  
Tiyyagura Laxmi Gayatri Reddy ◽  
G Vaishnao Vignesh ◽  
Animesh Sharma ◽  
...  
Keyword(s):  
Environmental Concern ◽  
Ground Improvement ◽  
Soil Reinforcement ◽  
Raw Material ◽  
Weak Soil ◽  
Manufactured Sand ◽  
Infrastructural Development ◽  
Geotechnical Characteristics ◽  
Soil Stabilisation ◽  
Quarry Dust

Abstract Massive urbanisation and infrastructural development caused by the growing population have taken place during the last decades. This means that in a rapidly expanding world economy we are running out of land. This problem has led to the use of ground improvement techniques to enhance the usability of land masses that were once not considered suitable for the development of infrastructure. Geocell is an innovative soil stabilisation product for civil engineering and development of infrastructures. They are cell containment systems which have been produced as an easy and durable material to stabilise and protect the compaction of the soil. The environmental concern regarding the disposability of quarry dust powder (QDP), produced from production units of M-sand (Manufactured sand), is of concern to the environment. The statement that is “waste of one industry should become the raw material for another” and that drawback can be addressed effectively by using it to improve the geotechnical characteristics of the weak soil. The purpose of this study is to find the optimal geocell-layer geometry and optimum combination of QDP infills to produce less settlement at a particular load using PLAXIS 2D software. The characteristics that have been varied are quarry dust powder in infill, geocell material and frequency of loading. These parameters were used for simulations to study the response of load vs settlements and the FOS of the slope. The FOS on the slope on the terrain was found to be 4.5, a steady slope. An optimised reinforcing mattress was ultimately found out.

Effect of Aspect Ratio on High Rise Structures with Diagrid

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
A. Vimala ◽  
A. Vimala
Keyword(s):  
Aspect Ratio ◽  
Numerical Study ◽  
Percentage Increase ◽  
Base Shear ◽  
High Rise ◽  
Aspect Ratios ◽  
Drift Ratio ◽  
Time Period ◽  
Diagrid Structure ◽  
Building Behaviour

Urbanization and population explosion in the present times has led to increase in demand for land and residencies but the availability of land is scare i.e reason a trend has evolved for construction of high rise structures in high rise structures major emphasis given to lateral load resisting systems. As diagrid structural system is lighter, stiffer and is effective in resisting the lateral loads, the present investigation carried out to study the performance diagrid on high rise structures varying aspect ratio. The study is carried out to observe the performance of diagrid structures ranging from 30 to 90 storeys. Diagrid structures are modelled with 3 storey module and performance of 7 models with different storeys i.e 30, 40, 50, 60, 70, 80, 90 (aspect ratio 3.67-10.86) and with fixed plan area. As a part 1 investigation to optimise the diagrid angle a 30 storey Diagrid structure performance is studied with 4 different diagrid angles one storey module angle 35°45’, Two storey module angle 55°13’, Three storey module 65°9’, Four storey module 70°51’. The optimized diagrid angle is used for different aspect ratio high rise structures to investigate the performance in terms of Storey displacement, Storey drift ratio, base shear and time period. For all the models plan area is fixed. Second part of investigation was a numerical study carried out by utilizing identified optimum angle of diagrid is applied on high rise buildings with aspect ratios 3.67, 4.86, 6.06, 7.26, 8.46, 9.67, 10.86 (Aspect ratio is the total height of the building to the width of the building). Behaviour of the Diagrid buildings due to change in aspect ratio is analysed based on parameters such as Storey displacements, Storey drift ratio, Base shear, Time period. As a part of investigation parameters such as Storey displacements and storey drift ratio were evaluated if they were within the limits as per IS code provisions. Percentage increase in storey displacements, maximum storey drift ratio,

scholarly journals Influence Factors Venture Capital, Farmer’s Institutions and Bussiness Typed to Farmer’s Successfull of the Independently Direct Aid Program in Ogan Ilir

2017 ◽  
Vol 12 (7) ◽  
pp. 174
Author(s):  
Tien Yustini
Keyword(s):  
Statistical Analysis ◽  
Venture Capital ◽  
Sampling Method ◽  
Influence Factors ◽  
Strong Relationship ◽  
Coefficient Of Determination ◽  
Percentage Increase ◽  
Independent Variables ◽  
Percentage Improvement ◽  
Negative Effect

This research aimed to analized the Capital from Independently program, Farmer’s Institutions and Bussiness typed to Farmer’s Successfull of the Independently Direct Aid Program (BLM) in Ogan Ilir. In this research are farmers who’s given the revolving fund from independetnly Direct Aid Program about 111 farmers. But in this research just 80 farmers whose being a sample. Sampling method that used in this research is purpossive sampling, which the farmers given revolving fund from BLM. Used the SPSS 22 Version, getting conclusion as; Capital Factors that taste of BLM, Business typed and Farmer’s institutions significant effect on the success of the implementation of the BLM program in Ogan Ilir seen with the revolving fund, where there are 41% of those who carry out rolling the BLM program funds more than five (5) times. Statistical analysis showed that the independent variables have a strong relationship to the dependent variable, where the value of the coefficient of determination (Adjusted R2) of 0.762. The Revenue Percentage Improvement BLM amounted to 0.828 against the percentage increase farmers' income that means the model can explain the variance of data 76.2% of the success of the BLM Program. Simultaneously (F-test) Capital variable, Business Type, Farmers Institutions real and significant effect on the success of the BLM program. The results of the t test (partially) Type of Business has a positive and significant impact on the success of the BLM program. While the variable capital, and the Farmer’s Institution, a significant negative effect on KBBLM Program.

Statistical Analysis of the Channelized Traffic and Road Condition Investigation about Beijing-Zhuhai Expressway

2012 ◽  
Vol 204-208 ◽  
pp. 1957-1960
Author(s):  
Zhi Jian Yang
Keyword(s):  
Statistical Analysis ◽  
Theoretical Basis ◽  
Traffic Conditions ◽  
Road Condition ◽  
Survey Results ◽  
Pavement Structure

We conducted a survey about the representative six sections of Beijing-Zhuhai expressway, including channelized traffic conditions and the corresponding traffic for this highway. And we were statistically analyzed to survey results. We had a new understanding to the operational status of domestic highway. Lane design for the pavement structure provided a theoretical basis.

Behaviour of geocell-reinforced sand beds under strip loading

2007 ◽  
Vol 44 (7) ◽  
pp. 905-916 ◽  
Author(s):  
Sujit Kumar Dash ◽  
K Rajagopal ◽  
N R Krishnaswamy
Keyword(s):  
Composite Beam ◽  
Model Tests ◽  
Soil Reinforcement ◽  
Laboratory Model ◽  
Strain Variation ◽  
Reinforced Sand ◽  
Subgrade Soil ◽  
Strip Loading ◽  
Geocell Reinforcement ◽  
Sand Beds

A series of laboratory model tests have been performed to study the behaviour of geocell-reinforced sand beds under strip loading. The strain in geocell walls, pressure transmitted to the subgrade soil, and deformations in the subgrade were measured during the tests to develop an understanding of the mechanism of geocell reinforcement. The pattern of strain variation in the geocell walls indicates that the geocell mattress behaves as a composite beam supported by the subgrade soil. The load dispersion in the geocell mattress is found to be governed by factors such as geometry of the geocell layer and its placement position under the footing.Key words: soil reinforcement, geocell, sand, behaviour, strip loading.

scholarly journals Performance of Subgrade Soil Blended with Cement and Ethylene Vinyl Acetate

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Kashif Ali Khan ◽  
Hassan Nasir ◽  
Muhammad Alam ◽  
Sajjad Wali Khan ◽  
Izhar Ahmad
Keyword(s):  
Compressive Strength ◽  
Vinyl Acetate ◽  
Soil Stabilization ◽  
Ethylene Vinyl Acetate ◽  
Testing Procedure ◽  
Percentage Increase ◽  
Subgrade Soil ◽  
Essential Properties ◽  
Porosity And Permeability ◽  
Properties Of Soil

To improve the essential properties of soil, stabilization proved to be more significant in overcoming the limitations of the desired soil. The improvement of soil properties will not only enhance the mechanical properties rather it will help in preventing dust and erosion formation. In this study, a set of tests are carried out to examine the strength characteristics of subgrade soil blended with ethylene vinyl acetate (EVA) and cement. EVA contributes almost 14% mass to the global waste, requiring bigger lands for its disposal; therefore, in order to promote a green environment and to bring an economical waste management system, an investigation of using EVA in the soil stabilization techniques is attempted. Soil specimens are investigated with and without the inclusion of EVA and cement. For this purpose, EVA was mixed with soil at a percentage level of 3, 6, and 9% whereas the cement was mixed at a percentage level of 4, 6, and 8%. To examine the combined effects of EVA and cement, the specimens were tested for compaction, direct shear, unconfined compression, triaxial, XRD, porosity, and permeability tests. All the soil samples were cured at 7, 14, and 28 days followed by the standard testing procedure. When cement was added to soil up to 4, 6, and 8% at a constant level of EVA (9%), cohesion was increased by 37, 42, and 46% while the unconfined compressive strength (UCS) was increased by 76, 81, and 84% for the same mixes. From the statistics, it clearly evident that the percentage increase caused by the addition of even 3% EVA to the cemented and uncemented soil specimens is very significant regarding cohesion and compressive strength. Porosity and permeability of soil containing both EVA (9%) and cement (8%) were decreased by 37% and 77%, respectively.

Appraisal on Different Sustainable Road Stabilization Techniques for Different Road Condition and Materials

2020 ◽  
Vol 975 ◽  
pp. 208-213
Author(s):  
Mohd Idrus Mohd Masirin ◽  
Halina Abdul Hamid ◽  
Raha Abdul Rahman ◽  
Abdullah Wagiman ◽  
Mohammad Sukri Mustapa ◽  
...  
Keyword(s):  
Soil Stabilization ◽  
Ground Improvement ◽  
Surface Condition ◽  
Road Surface ◽  
Engineering Properties ◽  
The Road ◽  
Subgrade Soil ◽  
Road Condition ◽  
The Difference ◽  
Ground Condition

Road condition in term of road surface condition depends on the subgrade soil strength. Therefore, a weak subgrade condition requires improvements in stabilization. Soil stabilization is the alteration of one or more geotechnical properties to create an improved soil material possessing the desired engineering properties. The main purpose of the soil stabilization is to increase the shear strength of an existing ground condition to enhance its load-bearing capacity, achieve a desired improved permeability and enhance the durability of the soil to resistance to the process of weathering, and traffic usage among others. Three method in soil stabilization considered in this study are chemical admixture, mechanical and geosynthetics methods. The difference in soil stabilization methods depends on the different road surface conditions. Road condition with weakness subgrade is more appropriate and economical in used stabilization chemical method. In this paper, discussing the road condition requires the ground improvement through soil stabilization

Cement Stabilisation of Subgrade Soil for Sustainable Pavement Structure

2021 ◽  
pp. 45-56
Author(s):  
Ahmad Kamil Arshad ◽  
Ekarizan Shaffie ◽  
Khairil Azman Masri ◽  
Ramadhansyah Putra Jaya ◽  
Yulinar Ismail
Keyword(s):  
Subgrade Soil ◽  
Pavement Structure
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