scholarly journals The Effects of Water Content Variation on Adhesion Factor of Pile Foundation in Expansive Soil

2013 ◽  
Vol 15 (2) ◽  
Author(s):  
Tjandra D. ◽  
Indarto . ◽  
Soemitro R.A.A.
Keyword(s):  
Water Content ◽  
Pile Foundation ◽  
Expansive Soil ◽  
Content Variation ◽  
Adhesion Factor

scholarly journals PENGUJIAN TANAH EKSPANSIF DENGAN SKALA MODEL MENGGUNAKAN KAYU DOWEL SEBAGAI PENGGANTI DINDING PENAHAN TANAH

2020 ◽  
Vol 3 (3) ◽  
pp. 853
Author(s):  
Richard Samuel ◽  
Alfred Jonathan Susilo
Keyword(s):  
Water Content ◽  
Pile Foundation ◽  
Expansive Soil ◽  
Lateral Movement ◽  
Swelling Properties ◽  
Important Thing ◽  
Shrinkage Potential

Foundation is one of the most important thing in a construction. The frequently used foundation in construction is pile foundation. In Indonesia  the used of pile is adapt by the condition and quality of the soil. Indonesia had many types of soil, and one of them is expansive soil. Expansive soil is a type of clay that had a swelling and shrinkage potential where the swelling happen when the water content is increase and shrink when the water content decreased. One of the mineral that can cause swelling is montmorillonite mineral in expansive soil. The chemical chain between particles that influenced by the increase of water content is causing montmorillonite mineral to swell. The focus of this research is lateral movement that happened to pile as an effect of the swelling properties in expansive soil. This analysis will also inform the effectiveness on using different size and number of pile in expansive soil. Fondasi merupakan salah satu bagian terpenting dalam suatu konstruksi. Salah satunya yang sering digunakan pada proses pelaksanaan konstruksi adalah fondasi tiang pancang. Di Indonesia sendiri penggunaan fondasi tiang pancang disesuaikan dengan kondisi dan kualitas dari tanah yang ada. Indonesia memiliki berbagai macam tipe dan jenis tanah yang berbeda, salah satunya adalah tanah ekspansif. Tanah ekspansif merupakan jenis lempung yang memiliki daya pengembangan dan penyusutan dimana pengembangan tersebut terjadi jika adanya penambahan kadar air dan menyusut ketika terjadi pengurangan kadar air. Salah satu yang dapat menjadi penyebab terjadinya pengembangan adalah kandungan mineral montmorillonite yang terdapat pada tanah ekspansif. Ikatan kimia antar partikel yang dipengaruhi oleh adanya peningkatan kadar air tanah menyebabkan mineral montmorillonite pada tanah ekspansif tersebut akan mengembang. Analisis yang dilakukan akan berfokus pada pergeseran lateral yang terjadi pada  tiang pancang sebagai akibat dari dampak pengembangan yang terjadi pada tanah ekspansif. Analisis ini juga menghasilkan efektivitas pada penggunaan ukuran dan jumlah tiang pancang ditanah ekspansif.

scholarly journals EFFECT OF DRYING-WETTING PROCESS ON FRICTION CAPACITY AND ADHESION FACTOR OF PILE FOUNDATION IN CLAYEY SOIL

2015 ◽  
Vol 77 (11) ◽  
Author(s):  
Daniel Tjandra ◽  
Indarto Indarto ◽  
Ria Asih Aryani Soemitro
Keyword(s):  
Shear Strength ◽  
Water Content ◽  
Pile Foundation ◽  
Undrained Shear Strength ◽  
Clayey Soils ◽  
Content Change ◽  
Adhesion Factor ◽  
Undrained Shear ◽  
Water Content Change ◽  
Friction Capacity

Clayey soils had a seasonal water content change, which occurred in the zone known as active zone. This change happen due to the seasonal drying and wetting cycles, which affects the fluctuation of water table. The water content variation causes the change in undrained shear strength and these changes have an impact to the friction capacity and adhesion factor of pile foundation. This paper discusses the undrained shear strength, friction capacity of pile and adhesion factor of piles under drying and wetting cycles. Research was conducted on two different types of clayey soils. Laboratory experiments for varying soil water content were done. Soil samples were placed in a cylinder tube, the concrete pile model was then inserted into the soil. The diameter of the tube was about 15 times of the pile diameter. Loading test was carried out to investigate pile friction capacity. The result of this study showed that there was great effect of seasonal water content change on undrained shear strength, friction capacity and also adhesion factor of pile in the clayey soils.

scholarly journals Methodology: non-invasive monitoring system based on standing wave ratio for detecting water content variations in plants

Plant Methods ◽  
2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Yunjeong Yang ◽  
Ji Eun Kim ◽  
Hak Jin Song ◽  
Eun Bin Lee ◽  
Yong-Keun Choi ◽  
...  
Keyword(s):  
Water Content ◽  
Monitoring System ◽  
Standing Wave ◽  
Magnetic Particles ◽  
Experimental Plant ◽  
Invasive Monitoring ◽  
Monitoring Method ◽  
Non Invasive ◽  
Content Variation ◽  
Stem Water

Abstract Background Water content variation during plant growth is one of the most important monitoring parameters in plant studies. Conventional parameters (such as dry weight) are unreliable; thus, the development of rapid, accurate methods that will allow the monitoring of water content variation in live plants is necessary. In this study, we aimed to develop a non-invasive, radiofrequency-based monitoring system to rapidly and accurately detect water content variation in live plants. The changes in standing wave ratio (SWR) caused by the presence of stem water and magnetic particles in the stem water flow were used as the basis of plant monitoring systems. Results The SWR of a coil probe was used to develop a non-invasive monitoring system to detect water content variation in live plants. When water was added to the live experimental plants with or without illumination under drought conditions, noticeable SWR changes at various frequencies were observed. When a fixed frequency (1.611 GHz) was applied to a single experimental plant (Radermachera sinica), a more comprehensive monitoring, such as water content variation within the plant and the effect of illumination on water content, was achieved. Conclusions Our study demonstrated that the SWR of a coil probe could be used as a real-time, non-invasive, non-destructive parameter for detecting water content variation and practical vital activity in live plants. Our non-invasive monitoring method based on SWR may also be applied to various plant studies.

Assessing the effect of moulding water content on the behaviour of lime-stabilised an expansive soil

2021 ◽  
pp. 1-13
Author(s):  
Abdelmoumen Aala-Eddin Driss ◽  
Khelifa Harichane ◽  
Mohamed Ghrici ◽  
Hamid Gadouri
Keyword(s):  
Water Content ◽  
Expansive Soil

scholarly journals Shear strength characteristics of Jerash expansive soil

2021 ◽  
Vol 3 (2) ◽  
pp. 74-80
Author(s):  
Talal Masoud
Keyword(s):  
Shear Strength ◽  
Internal Friction ◽  
Water Content ◽  
Direct Shear Test ◽  
Shear Test ◽  
Expansive Soil ◽  
Content Increase ◽  
Direct Shear ◽  
Initial Water ◽  
Angle Of Internal Friction

The results of the direct shear test on Jerash expansive soil show the effect of the initial water content on the cohesion (c) and on the angel of internal friction ( ) [shear strength parameters].it show that, as the initial water increase, the cohesion (c) of Jerash expansive soil also increase up to the shrinkage limit, after that increase of water even small amount, decrease the cohesion of the soil. On the other hand, the results of direct shear test show also  that as the water content increase, the angle of internal friction ( )remain unchanged up to shrinkage limit , any increase of water cause a large decrease on the angle of internal friction of Jerash expansive soil.

WATER CONTENT VARIATION IN THE HEARTWOOD OF WHITE PINE AND ITS RELATION TO INCIPIENT DECAY

1958 ◽  
Vol 34 (1) ◽  
pp. 48-50 ◽  
Author(s):  
S. N. Linzon
Keyword(s):  
Water Content ◽  
White Pine ◽  
Content Variation

Analyses of Anti-Seepage Measure for Expansive Soil Subgrade in Hefei

2014 ◽  
Vol 580-583 ◽  
pp. 552-555
Author(s):  
Yuan Wei ◽  
Wei Zhong Xing ◽  
Yan Shao
Keyword(s):  
Numerical Calculation ◽  
Moisture Content ◽  
Water Content ◽  
Engineering Design ◽  
Control Measure ◽  
Expansive Soil ◽  
Large Change ◽  
Time Range ◽  
Seepage Control ◽  
Unsaturated Expansive Soil

Deformation of expansive soil subgrade depends on moisture content. Anti-seepage measure of unsaturated expansive soil was carried out using ABAQUS as for the influence of atmosphere. The results show that there is large change in water content using anti-seepage measure measure. After using anti-seepage measure, range of water content decreases. At the same time, range of water content value obviously decreases with the increase of the depth of seepage control. Therefore, damage of pavement caused the deformation can decrease by seepage control measure. The results could be used for engineering design and numerical calculation.

Sign in / Sign up

Export Citation Format

Share Document