Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userGeotechnical evaluation of effectiveness a place and a number of layers of geogrid soil reinforcement in mitigating crack phenomenon in irrigation service roads in Al-Ghab area
التقييم الجيوتكنيكي لفاعلية مكان طبقات تسليح التربة بالجيوغريد و عددها في الحد من ظاهرة تصدع الطرق التخديمية المجاورة لقنوات الري في منطقة الغاب
2351
1 43
0
(
0
)
Authors
طلال عواد( باحث )
Created by
Shamra Editor
Ask ChatGPT about the research
إن تصدع الطرق التخديمية المجاورة لقنوات الري قد تحول إلى ظاهرة شبه عامة في منطقة الغاب. إِذ تشير المعطيات كّلها إلى أن الانتشار الجانبي للإجهادات في منطقة ميل المنحدر قد أدت إلى تشققات في الأطراف الجانبية للطريق ناتجة عن انتقالات أفقية يمكن أن تكون هي المسيطرة على الانتقالات الكلية. في هذه المقالة يقدم تقييم جيوتكنيكي لإمكانية تسليح التربة بالجيوغريد للحد من هذه الظاهرة، إِذ درِست الانتقالات الكلية و الأفقية و الشاقولية عند طرف الطريق المجاور للمنحدر من خلال سلسلة من النماذج العددية للعناصر المحدودة. و قد درِست نماذج غير مسلحة و نماذج مسلحة بالجيوغريد في مواضع مختلفة، و قد اختير التوضع ذو الفاعلية الفضلى، كما حدد معامل النفع و معامل كفاءة عمل الطريق المسلح بالجيوغريد.
Cracks of irrigation channel’s service roads are becoming a significant feature in Al-Ghab region. All information indicates that lateral spreading of stresses in slope vicinity induced cracks in the side parts of roads. These cracks resulted from lateral displacements, which could dominate total displacements. This paper presents a geotechnical evaluation of the possibility to mitigate this phenomena by using geogrid soil reinforcement. Finite elements numerical model analysis is performed to calculate total, horizontal and vertical displacements at road side near channel’s slope. Numerical models include different cases of un-reinforced soil and geogrid reinforced soils at different locations. Locations of geogrid were chosen carefully to attain the best effectiveness. Beneficial factor and coefficient of efficiency were determined for reinforced road.
References used
Barksdale,r,d,s,f.and F.chan(1989)''Aggregate basereinforcement of surfaced pavement'' VOL.8,pp 165-189
rate research
Read More
In spite of an increase of farming experiance, producers are still facing
many obstacles which affect negatively on their final income.
It is clear from this study the decrease of productivity per unit area of wheat
and cotton crops and high produ
ction cost, caused decrease of the final income.
Most of the farmers, were not satisfied with cultivation of these crops, due to
increase of production cost, unsuitable price, lack of cultivation requirements
and the prices rising…..etc.
Also, the extension services offered to the farmers are poor and not at the
required level. That was the most important reason for the decrease of the
productivity. Consequently, it is possible to develop the agricultural activity by
improving the extension services and decreasing the prices of production
requirement and improving the selling prices. Therefore, it is necessary to
decrease the production costs of wheat and cotton crops, increase their
productivity, improve and activate the extension units work and spread
awareness and knowledge about modern methods of cultivation as well as ways
of decreasing the productivity costs, the factors which help to increase the
productivity from unit area, and acquainting the farmers to other crops, which
could be alternative crops in the future.
The study has shown that the apparent bulk density of soil increases with the increase
of compression and moisture during press. The maximum rate of increase in depth was 0 –
20 cm that amounted 0.38g/cm3 at compression by 257.44-kilopascal and moi
sture
average at compression by 19.03% (equal to 60% of the field capacity average of the soil)
in comparison with the non-existence of compression. In addition, the size of the pores
bigger than 50 microns decreased at the same above compression and above moisture in
depth of zero – 20 cm by 20.20%. The size of pores bigger than 10 microns decreased by
20.65% in comparison with the non-existence of compression. While it was noted that the
the maximum loss of root yield that amounted 17.52%, at compression by 257.44
kilopascal, and moisture 19.03%.
The study included the reality of marketing crop sugar beet in Syria in general, and
in al ghabb 's area , in particular, has shown results that the problems and difficulties of
marketing sugar beet back to the non-compliance of farmers date of Agr
iculture
appropriate and space devoted to the cultivation of the crop sugar beet and assessed by the
General Authority to manage and develop Al Ghabb's area, in addition to the failure of the
extension units in turn supply the deadline cards provide timely and sufficient quantities to
farmers as a result of the process control system of favoritism in the distribution of cards
supply extension units.
In addition to the low energy manufacturing to the sugar mill, and its inability to
absorb the quantities produced in excess of the agricultural plan, along with breakdowns
lab frequent result gave the mechanisms used in it, and the need for frequent maintenance,
and low efficiency of some sections of the lab, and the control system favoritism determine
the degree of sweetness, as shown by the results Search also "high production and
marketing costs for sugar beet crop and is higher than its price.
The aim of this study was to evaluate the affecting factors of
Buffalo milk production in Al- Ghab Plain. The data were
collected according to the farmers during the season of 2009-2010.
The effect of parturition season, dry period and calving int
erval
were studied. The results showed that the mean milk production
was 934,96 kg with 8.1% fat and 4.85% protein. The lactation
period was 180-240 days, the dry period was 120-180 days and the calving interval mean was 420 days. Our results indicated that the quantity of buffalo milk in Syria was low because of the short
lactation period, the long dry period and the long calving interval.
But it could be possible to improve the buffalo milk production by
the better rasing conditions and genetic improvement.
Principally the main bases for comparison are to compare the field losses with the net water requirement
in addition to that a comparison should be carried out between the most important financial indicators i.
e. the used capital and the investmen
t capital.
Comparing field losses to the net water requirement, it appears that drip irrigation methods come first
then comes sprinkler irrigation and after surface irrigation (furrow irrigation), but from comparing the
basic cost to financial investment, it appears that sprinkler irrigation precedes drip irrigation followed by
surface irrigation (furrow irrigation).
If we take into consideration the crop composition in the region where wheat crop, according to the crop
rotation reaches 56.24% and which is impossible to irrigate by the drip method, in addition to the
necessity of forming a washing stream of water opposing the rising water stream by capillarity caused by
the proximity of saline underground water, we found out that irrigation by sprinkling is the optimum
method for this region.
suggested questions
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
