scholarly journals Analysis Of Geoelectrical And Soil Test Data To Determine Subsurface Conditions In Makassar City, South Sulawesi

Khazanah ◽  
2020 ◽  
Vol 12 (2) ◽  
Author(s):  
Jefri nainggolan ◽  
◽  
Muhammad Fajar ◽  
Keyword(s):  
Water Content ◽  
Sandy Loam ◽  
Standard Penetration Test ◽  
Special Treatment ◽  
Test Results ◽  
Penetration Test ◽  
Resistivity Tomography ◽  
South Sulawesi ◽  
Laboratory Test Results ◽  
The Stability

Research has been carried out to determine subsurface conditions. The research objective was to determine the physical properties of the soil in order to evaluate and provide recommendations for solving foundation problems. The methods are the resistivity geoelectric and IP geoelectric method (induced polarization) with ERT (Electrical Resistivity Tomography), SPT (Standard Penetration Test) and laboratory test results. The results of the resistivity values obtained varied in the range from 17.0 - 172.0 ohm m with a depth of 0 m - 2.87 m, most of which were interpreted as alluvium soil, namely sandy loam. This is reinforced by the results of the IP method where the low chargebility value is around 0.130 - 4.70 msec. In addition, it was found that from the SPT test, it was obtained that the variation of blows from 14 to 21 N at a depth of 0 - 5.50 meters and >60 N from a depth of 5.50 - 20 m which stated that most of them consisted of clay and sandstones. Then based on laboratory tests, it was found that at a depth of 3 - 3.5 meters it consisted of 86.47% clay with a plastic limit of 37.07% and the water content was 39.41%, while at a depth of 9 -9.5 meters it consisted of sandstones which the characteristic is non- plastic with a water content of up to 72.04%. It is concluded that the surface soil is conductive, it is necessary to hold special treatment for this type of soil in order to avoid erosion when it is saturated with water and it is hoped that the stability of the soil will be better. One of two ways is by mixing high density soil and making a "chicken claw" foundation to strengthen the foundation with a depth of more than 5.0 meters. Keywords: Geoelectric, Standard Penetration Test, Resistivity, Chargebility, Foundation.

Reliability Analysis of Foundation Settlement in Nigeria Based on Standard Penetration Test Results

Geo-Risk 2017 ◽  
2017 ◽  
Author(s):  
Salahudeen A. Bunyamin ◽  
Ijimdiya S. Thomas ◽  
Eberemu O. Adrian ◽  
Osinubi J. Kolawole
Keyword(s):  
Reliability Analysis ◽  
Standard Penetration Test ◽  
Foundation Settlement ◽  
Test Results ◽  
Penetration Test

scholarly journals PERENCANAAN PONDASI TIANG PANCANG GEDUNG DINAS TENAGA KERJA DAN TRANSMIGRASI

2020 ◽  
Vol 3 (1) ◽  
pp. 23
Author(s):  
Ahmada Khotibul Umam ◽  
Sigit Winarto ◽  
Ahmad Ridwan ◽  
Agata Iwan Candra
Keyword(s):  
Standard Penetration Test ◽  
Building Construction ◽  
Penetration Test ◽  
Cross Sectional ◽  
Calculation Results ◽  
Building Load ◽  
Heavy Loads ◽  
Control Stability ◽  
The Stability ◽  
The Right

The foundation has an important role in the field of construction. The function of the foundation is to transport the building load to the subgrade, so the foundation must be planned with the right calculation so that the building is safe and stable. Pile foundation is one type of foundation used in building construction with heavy loads. In research, land investigations use SPT (Standard Penetration Test). The calculations include the carrying capacity of the soil, the loading of buildings, the dimensions and depth of the pile, and the stability of the controls. Calculation results obtained, loading on floors 1 to 3, totaling 4,463.5 Tons. The dimensions of the foundation are 0.6, with a cross-sectional area of 0.28274334 and a depth of 18 M. The need for strengthening the foundation is 600059.7 Kg. With bolt control stability 24,620 Tons / M2 > 1.5 Tons / M2 – >   Safe, shear  9,156 Tons / M2  > 0,156 Tons / M2 –  > Safe.Pondasi memiliki peranan penting dalam bidang konstruksi. Fungsi pondasi sendiri yaitu meneruskan beban bangunan ke tanah dibawah pondasi menjadikan pondasi harus direncanakan dan diperhitungkan dengan tepat agar bangunan yang didirikan aman dan stabil. Salah satu jenis pondasi yang banyak digunakan yaitu pondasi tiang pancang. Pondasi tiang pancang merupakan salah satu jenis pondasi dalam yang banyak digunakan pada konstruksi yang memiliki beban berat. Dalam penelitian, penyelidikan tanah menggunakan metode SPT (Standart Penetration Test). Perhitungan yang dilakukan meliputi perhitunagn daya dukung tanah, Pembebanan bangunan, dimensi dan kedalaman tiang pancang, serta stabilitas control. Hasil dari perhitungan didapat, pembebanan lantai 1 sampai 3 sebesar 4663,5 Ton. Dimensi pondasi sebesar 0,6 M dengan luas penampang 0,28274334 M dan kedalaman 18 M. Kebutuhan tulangan pondasi yaitu 600059,7 Kg. Dengan stabilitas kontrol terhadap guling 24,620 Ton / M2 > 1.5 Ton / M2 – >   Aman, Gaya terhadap geser 9,156 Ton / M2  > 0,156 Ton / M2 –  > Aman.

scholarly journals EFFECT OF TRANSFERSOME FORMULATION ON THE STABILITY AND ANTIOXIDANT ACTIVITY OF N-ACETYLCYSTEINE IN ANTI-AGING CREAM

2020 ◽  
pp. 156-162
Author(s):  
HARMITA HARMITA ◽  
ISKANDARSYAH ISKANDARSYAH ◽  
SHOFIYAH FATIN AFIFAH
Keyword(s):  
Antioxidant Activity ◽  
Mobile Phase ◽  
Test Results ◽  
Penetration Test ◽  
Injection Volume ◽  
Accelerated Stability ◽  
Dpph Method ◽  
The Stability ◽  
Franz Diffusion Cells

Objective: N-acetylcysteine is an antioxidant with thiol/sulfhydryl groups and is currently being developed as an active ingredient in anti-agingcreams. The study’s aim was to compare the stability and antioxidant activity of N-acetylcysteine in anti-aging creams formulated with and withouta transfersome carrier system.Methods: Stability was assessed by performing cycling, centrifugal, and accelerated stability tests. In addition, antioxidant activity was measuredby the DPPH method, and in vitro penetration was measured using Franz diffusion cells. The analysis of N-acetylcysteine was performed using highperformanceliquid chromatography with ultraviolet–visible detection at a wavelength of 214 nm and a flow rate of 1.0 mL/min, injection volume of5 μL, and a mobile phase of phosphate buffer pH 3.0.Results: The N-acetylcysteine transfersome and non-transfersome cream preparations did not change color or show phase separation during thecycling and centrifugal tests. The N-acetylcysteine in the transfersome and non-transfersome cream preparations had strong antioxidant activity,with half-maximal inhibitory concentrations of 26.90 μg/mL and 38.63 μg/mL, respectively. The in vitro penetration test using Franz diffusion cellsshowed that the cumulative amount of penetrated N-acetylcysteine was 7355.13 μg/cm2 (flux of 845.67 μg/cm2∙h) in the transfersome cream and4677.61 μg/cm2 (flux of 533.33 μg/cm2∙h) in the non-transfersome cream.Conclusion: The in vitro penetration test results showed that the transfersome formulations in creams were able to increase the cumulative amountand flux of penetrated N-acetylcysteine in anti-aging cream preparations relative to those not formulated with transfersome.

Field Testing: The Standard Penetration Test

1986 ◽  
Vol 2 (1) ◽  
pp. 21-26 ◽  
Author(s):  
S. Thorburn
Keyword(s):  
Field Testing ◽  
Standard Penetration Test ◽  
Cohesive Soils ◽  
Test Results ◽  
Penetration Test ◽  
Test Procedures ◽  
Weak Rocks ◽  
Fine Grained ◽  
Introductory Lecture ◽  
Strength And Stiffness

AbstractThis introductory lecture discusses the international use of the standard penetration test (SPT) and presents the proposals for International Reference Test Procedures. The application of the SPT as a means of assessing the strength and stiffness of weak rocks is mentioned together with the reliance upon the test at the present time for estimating the liquefaction potential of saturated fine grained non-cohesive soils. The various aspects of the execution of the SPT are discussed which can provide variable and unrepresentative values of resistance (N values).The principle of measuring energy losses and making adjustments to the N values is introduced as a basis for ensuring comparability of test results.Reference is made to the general descriptions of the SPT given in BS 5930:1981 and to the lack of clear guidance in this British Standard.

scholarly journals Geotechnical characterisation and back analysis of a landslide in marl deposit: A case study of Algiers Sahel (coast), Algeria

2020 ◽  
Vol 62 (4) ◽  
Author(s):  
M Filali ◽  
A Nechnech ◽  
J de Rosa ◽  
H Gadouri ◽  
B Meziani
Keyword(s):  
Shear Strength ◽  
Limit Equilibrium ◽  
Back Analysis ◽  
Test Results ◽  
Limit Equilibrium Methods ◽  
Laboratory Test Results ◽  
Geotechnical Investigations ◽  
The Stability ◽  
Low Shear

The purposeof this study isto present the results of geotechnical investigations and landslide analysis in a marl deposit at the Sahel (coast) of Algiers in northern Algeria, where many landslides take place in the Plaisancian marls, particularly following rainfall periods each year, causing severe damage to infrastructures and buildings. The physico-mechanical characteristics of the soils obtained from three different sites (El-Achour, Daly-Brahim and Ouled-Fayet) were analysed to identify the mechanism of these landslides. In the study, the laboratory test results providing grain-size distribution, Atterberg limits, water content, shear strength, and compressibility were analysed. The findings showed that, although the soils were characterised by slightly higher plasticity at Ouled-Fayet, they were generally homogeneous in the studied sites. The upper soils, generally weathered, exhibited low shear strength parameters, which are lower than the undisturbed formation beneath. The stability analysis based on limit equilibrium methods (LEM) showed the significant influence of pore water pressures on slope stability, suggesting that the weathered soils are prone to instability processes due to the effect of long rainy periods.

scholarly journals PHYSICAL AND CHEMICAL PROPERTIES OF GROUNDWATER IN BANJARARUM AREA AND ITS VICINITY, WEST PROGO

KURVATEK ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 111-116
Author(s):  
Sri Ning Peni ◽  
. . T. Listyani R.A.
Keyword(s):  
Volcanic Rocks ◽  
Chemical Properties ◽  
Mineral Dissolution ◽  
Special Treatment ◽  
Test Results ◽  
Chemical Test ◽  
Animal Dung ◽  
Groundwater Samples ◽  
Laboratory Test Results ◽  
Physical And Chemical

 Groundwater in the Banjararum area is found in various rocks that build  the West Progo Hills, including the Nanggulan and the Andesite Breccia Formations. Groundwater can be found in dug wells and springs. Field surveys show that the groundwater is generally clear, tasteless and odorless, except for the well at Ngipikrejo. Chemical test results from four samples showed that groundwater in limestone has Ca, Mg - HCO3 type, whereas in volcanic rocks of type Ca - HCO3 and Ca, Na - HCO3. Groundwater chemistry type is generated from the soil, mineral dissolution in sedimentary rocks and igneous rocks as well as the atmosphere through rainwater. The considerable content of NO3 in the Ngipikrejo area indicates pollution from human activities, plants or animal dung. In general, groundwater in the study area is suitable for use as clean water or drinking water, characterized by a measurable pH in the field of 6.6 - 7.2 and TDS 54 - 155 ppm. Nevertheless, laboratory test results show that groundwater samples are water-filled, with a hardness of 135,866 - 778,048 (moderately hard - very hard), so special treatment is required before drinking.

Anchorage Effect on Fractured Rock and Cavern Stability

2011 ◽  
Vol 90-93 ◽  
pp. 618-621
Author(s):  
Wen Wang ◽  
Wei Shen Zhu ◽  
Min Yong
Keyword(s):  
Fractured Rock ◽  
Surrounding Rock ◽  
Test Results ◽  
Propagation Process ◽  
Laboratory Test Results ◽  
Key Points ◽  
Splitting Test ◽  
Crack Propagation Process ◽  
The Stability ◽  
Rock Specimens

The effect of anchor on fractured rock specimens in splitting test is simulated by DDARF method in this research. The results are compared and agree well with laboratory test results. The DDARF program is also adopted to analyze the stability of an underground cavern with four groups of randomly generated joints in the surrounding rocks, in which two conditions with and without rock bolts are considered. Besides, the crack propagation process around the cavern and the displacements of key points in the surrounding rock are monitored and applied to investigate the stability of the cavern.

Sign in / Sign up

Export Citation Format

Share Document