Miami Constructions
Construction & Drilling Contractor
مقاولات انشاءات
وحـفريات (MC) مـيامـى
للانشاءات والمقاولات
___________________________________________
Pile and Water Wells Drilling Services
Miami Constructions. (MC) handles Piling, General Construction, Soil and Water investigations, Water Wells drilling & sampling,
and all other drilling projects all around Sudan.
PILE DRILLING
The objective of this page is to help the customers understand these classifications using
materials extracted from several sources in addition to our own observations, and experience, this page gives simple introduction
to pile foundations.
Pile foundations
Pile
foundations are the part of a structure used to carry and transfer the load of the structure to the bearing ground located
at some depth below ground surface. The main components of the foundation are the pile cap and the piles.
Piles are long and slender members which transfer the load to deeper soil or rock of high
bearing capacity avoiding shallow soil of low bearing capacity The main types of materials used for piles are Wood, steel
and concrete. Piles made from these materials are driven, drilled or jacked into the ground and connected to pile caps. Depending
upon type of soil, pile material and load transmitting characteristic piles are classified accordingly. In the following chapter
we learn about, classifications, functions and pros and cons of piles.
Historical
Pile foundations have been used as load carrying and load transferring systems
for many years. In the early days of civilization, from the communication, defense or strategic point of view villages and
towns were situated near to rivers and lakes. It was therefore important to strengthen the bearing ground with some form of
piling.
Timber piles were driven in to the ground by hand or holes were
dug and filled with amsand and stones. In 1740 Christoffoer Polhem invented pile driving equipment which resembled to days
pile driving mechanism. Steel piles have been used since 1800 and concrete piles since about 1900. The industrial revolution
brought about important changes to pile driving system through the invention of steam
and diesel driven machines. More recently, the growing need for housing and construction has forced
authorities and development agencies to exploit lands with poor soil characteristics. This has led to the development and
improved piles and pile driving systems. Today there are many advanced techniques of pile installation.
Function
of piles
As with other types of foundations, the purpose
of a pile foundation is:
to transmit a foundation load to a solid ground
to resist vertical, lateral and uplift load A structure can be founded on piles if the soil immediately beneath its base does
not have adequate bearing capacity. If the results of site investigation show that the shallow soil is unstable and weak or
if the magnitude of the estimated settlement is not acceptable a pile foundation may become considered. Further, a cost estimate
may indicate that a pile foundation may be cheaper than any other compared ground improvement costs.
In the cases of heavy constructions, it is likely that the bearing capacity of the shallow
soil will not be satisfactory, and the construction should be built on pile foundations. Piles can also be used in normal
ground conditions to resist horizontal loads. Piles are a convenient method of foundation for works over water, such as jetties
or bridge piers.
Pile arrangement
Normally, pile foundations consist of pile cap and a group of piles. The pile cap distributes
the applied load to the individual piles which, in turn, Transfer the load to the bearing ground. The individual piles are
spaced and connected to the pile cap or tie beams and trimmed in order to connect the pile to the structure at cut-off level,
and depending on the type of structure and eccentricity of the load, they can be arranged in different patterns. Figure 2.1
bellow illustrates the three basic formations of pile groups.
General types
of single pile:
1- End bearing piles
2-
Friction piles
3- Cohesion piles
4 -Steel piles
5 -Concrete piles
6- Pre-cast concrete
piles
7- Timber piles (wood piles)
8- Others
General types of Group pile and bearing capacity of pile groups:
1-Pile group in cohesive soil
2- Pile groups in non-cohesive soil
3- Pile groups in sand
Our Pile Installation Methods:
1-
Pile driving methods (displacement piles)
2- Drop hammers
3-
Diesel hammers
4- Pile driving by vibrating
5-Boring
methods (non-displacement piles)
6- Continuous Flight Auger (CFA)
7-
Under reaming
8- C.H.P (Continuous helical displacement piles)
MC
Load Test on Pile
Pile load test are usually carried out that
one or some of the following reasons are fulfilled:
·
To obtain back-figured soil data that will enable other piles to be designed.
·
To confirm pile lengths and hence contract costs before the client is committed to over all job costs.
· To counter-check results from geotechnical and pile driving formulae
· To determine the load-settlement behavior of a pile, especially in the
region of the anticipated working load that the data can be used in prediction of group settlement.
· To verify structural soundness of the pile.
Test
loading:
There are four types of test loading:
1- Compression test
2- Uplift test
3- lateral-load test
4-
torsion-load test
The most common types of test loading procedures
are Constant rate of penetration (CRP) test and the maintained load test (MLT). CRP (constant rate of penetration) In the
CRP (constant rate of penetration) method, test pile is jacked into the soil, the load being adjusted to give constant rate
of downward movement to the pile. This is maintained until point of failure is reached. Failure of the pile is defined in
to two ways that as the load at which the pile continues to move downward without further increase in load, or according to
the BS, the load which the penetration reaches a value equal to one-tenth of the diameter of the pile at the base. In the
cases of where compression tests are being carried out, the following methods are usually employed to apply the load or downward
force on the pile:
A platform is constructed on the head of the
pile on which a mass of heavy material, termed "kentledge" is placed. Or a bridge, carried on temporary supports,
is constructed over the test pile and loaded with kentledge. The ram of a hydraulic jack, placed on the pile head, bears on
a cross-head beneath the bridge beams, so that a total reaction equal to the weight of the bridge and its load may be obtained.
MLT, the maintained increment load test, the maintained increment load test, kentledge or adjacent tension piles or soil anchors
are used to provide a reaction for the test load applied by jacking(s) placed over the pile being tested. The load is increased
in definite steps, and is sustained at each level of loading until all settlements has either stop or does not exceed a specified
amount of in a certain given period of time.
WATER DRILLING
We perform the following Full Water Well drilling services:-
# | Descriptions |
|
1 | Complete Geophysical Investigations for location of water (per job) |
2 | Water
well drilling (Rotary Percussion) (per foot or meter) |
3 | Water well Drilling (Rotary fluid flush) (per foot or meter) |
4 | Logging
(different types) could be run as SP, SPR, LPR, GE, |
5 | Supply & Installation of Wire-wound screen, (per meter) |
6 | Supply
& Installation of Steel Casing (API, or ASTM) |
7 | Supply of 6” uPVC plain casing (5% open area) per meter |
8 | Development
by airlift raw hiding (per hour) |
9 | Installation of Polyphosphate Treatment |
10 | Pumping
Test including installation and removing, per hour of discharge |
11
| Recovery measurement (per hour testing) |
12 | Supply,
and Installation of submersible electrical pump |
13 | Drilling Diameters available are:- 8.5, 10.75, and 12.25 inches |
14 | Comprehensive
testing (step doewn-5 steps) and constant discharge test 24HR |
15 | Supply, and installation of 3 phase electric c/w flowmeters and pyrometer
tubes |
16 | Equipment , materials, and personnel mobilization to the required
sites |
|
ميامى للانشاءات
والمقاولات
قسم الحفريات
عمليات
حفريات المياه الجوفيه
عمليات
الاختبارات الجيوفيزيائه
المتكامله وتوثيق تقاريرها
العلميه المرافقه
الحفر المتكامل
لآبارالمياه الجوفيه
والسايفونات بمقاييس
حفر واعماق متنوعه
عمليات اللوقنق
للآبار وتقاريرها العلميه
المرافقه
توريد
وتركيب كافة احتياجات
الآبارمن معدات ومواد
عمليات تطوير
ونظافه الابارواعاده
تاهيلها
عمليات
اختبارات الضخ وتقاريرمستويات
وكفائه التغذيه
توصيل شبكات المياه
وتنوك حفظ المياه والصهاريج
بكافه الاحجام
توريد وتركيب طلمبات
المياه الغاطسه والسطحيه
والمتنقله
عمل
اختبارات حقليه متكامله
لمياه الاباروالحفائروتوثيق
تقاريرها العلميه المرافقه
تنفيذ كل الاعمال
المدنيه المصاحبه كالاسواروغرف
المولدات والطلمبات والمكاتب.
ونحن على استعداد
لتنفيذ اعمال حفريات
المياه والاسفينات بجميع
ولايات السودان
OTHER DRILLING
(1) Storm water systems and sewage systems drilling & installation
(2) Utilities drilling (phone, and electric
ground lines)
اعمال الحفريات
المتنوعه الاخرى
حفريات
و بناء مجارى تصريف المياه
الدائمه والمؤقته وانشاء
المعابر والكبارى عليها
حفريات
وتوصيل كيبلات التلفونات
والكهرباء
حفريات
الاسفينات لمختلف الاعماق
والاقطار
تصميم وعمل
الحفائر والسدود الترابيه
والخرسانيه
تصميم وعمل
احواض وبرك مزارع الاسماك
عمل
اختبارات حقليه متكامله
للتربه قبل الحفر وتوثيق
تقاريرها العلميه المرافقه
توريد
و تصميم و تنفيذ الاشارات
الضوئيه لتسهيل حركه
المرور
TESTS
MC offers variety of soil tests, water
tests, and land surveying associated with our construction sites, and for other general environmental purposes
We are a member
of The Sudanese Contractors Association
Member number (S.C.A. - 875 - 2006)
Data
Universal Numbering System (DUNS) number is:- 565474376
Standard Industrial Classification (SIC) codes are:-
1781 Water Well Drilling
1623 Water, Sewer, Pipeline,
and Communications and Power Line Construction
1794 Excavation Work
1629 Heavy Construction, Not Elsewhere Classified
8741 Management Services
For additional technical questions or comments about the content
of this page Please, contact: drill@sudanland.com