- Home
- Services
- High-Tech Elevators
Infrastructure
Infrastructure construction projects are what keep the important functions of saudi Arabia thiving.
These Projects ensure that electricity and water are flowing to homes and businesses.
They are also responsible for the construction of safe and practical road, bridges and other mass transit ways used to deliver people and good across the nation these are various types of infrastructure cinstruction projects which PV is undertaking
I. Highways, roads, and streets.
II. Bridges
III. Mass transit and airports.
IV. Water supply and resources.
V. Waste management.
VI. Power generation and the transmission of power
VII. Telecommunications.
VII. Hazardous Waste and removal.
MICRO
TUNNELING
Micro tunneling is a tunnel construction technique used to construct utility tunnels
from approximately 0.5–4 m (1 ft 8 in – 13 ft 1 in) in diameter. Because of their
incredibly small diameter, it is not possible to have an operator driving the tunneling
machine, so they have to be remotely operated.
Micro tunneling is a trenchless construction method used to install pipelines beneath
highways, railroads, runways, harbors, rivers, and environmentally sensitive areas.
Micro tunnels are installed using a remote-controlled drilling and pipe-jacking system.
The drilling system provides continuous support to the excavation face by applying
mechanical or fluid pressure to balance groundwater and earth pressures
OPEN FACE PIPE JACKING
Pipe Jacking is a technique similar to micro tunnelling but utilise1d only at larger,
man-entry diameters. The ground excavation machine or shield is advanced through
the ground along a pre-determined route by jacking it forward from a launch shaft
using specially designed high-strength jacking pipes. Navigation is achieved using
specialist systems which may be laser targeting for straight drives or more
sophisticated for drives with included curves.
Applicable for installation of gas, water, cable, sewer, surface water channels in
man-entry diameters up to 3 m or more over lengths limited only by the ground
conditions and by the designed jacking pipe strengths and pipe string design.
CONCRETE
BOX PUSHING
The purpose of box pushing is to form a horizontal opening below the ground through the embankment by providing precast box units underground, without disturbing overhead amenities like traffic and various structures. The method of box pushing broadly consists of construction of thrust bed, construction of precast RCC box segments over thrust bed, front cutting shield, intermediate jacking station and pushing operation of precast box units. The boxes are designed and constructed at the site itself. The advantage of box pushing technique is no disruption in traffic movement, whether it be railways or roadways, and better-quality control. The technique is also economical, time for completion is less, savings are realised in manpower & machinery and importantly, there is no involvement of cranes and heavy machinery.
HORIZONTAL
DIRECTIONAL DRILLING
Horizontal Directional Drilling (HDD) is a method of installing underground pipelines, cables and service conduit through trenchless methods. It involves the use of a directional drilling machine, and associated attachments, to accurately drill along the chosen bore path and back ream the required pipe. The first stage consists of drilling a small diameter pilot hole. Drilling fluid is pumped through the drill pipe to the drill bit where high-pressure jets and the bit will grind the soils ahead of the drill stem. The second step is to pre-ream the pilot hole and enlarge it to a size sufficient to safely install the product lines. The final step is the pullback of the pipe within the pre-reamed hole.
SHORING &SHEET PILING
Shoring is a positive ground support system that can be used when the location or depth of an excavation makes battering and/or benching impracticable. Shoring is the provision of support for excavated face(s) to prevent the movement of soil and therefore ground collapse. It is a common method of ground support in trench excavation where unstable ground conditions, such as soft ground or ground liable to be wet during excavation such as sand, silt or soft moist clay are often encountered. Sheet piles are used in earth retaining structures where a differential surface level is to be established. The sheet pile forms the vertical interface.
DEWATERING
Dewatering means “the separation of water from the soil:’ or perhaps “taking
the water out of a particular construction problem completely. Many
excavations are carried below groundwater level.
Techniques for dealing with the problems that result depend on the
excavation dimensions, the soil type, and the groundwater control
requirements, among other factors. Well point Dewatering systems enable
the lowering of the groundwater table, which allows safe excavation below
the normal water table. This method has been used for many years for a wide
range of applications from small excavations through to major construction
projects
LAMINATION
The glass mats and glass fabrics are cut, and the resin mixture prepared for the
lamination process. The resin is applied to the prepared surface using a lambskin roller.
Next, the first glass mat is applied, saturated with lamination resin and rolled with a
roller. The second layer is processed similarly. Rolling is carried out using a de-airing
roller, e.g. steel grooved roller. By winding a layer of glass silk tape onto the lamination,
the lamination is dandified. The glass silk tape must be applied evenly with an overlap of
approx. 50% and well soaked with resin.
Accordingly, the following lamination layers are applied in a modular way. Then again
resin is applied to the existing lamination with the lambskin roller; a layer of glass fabric
is applied, impregnated with resin, and rolled with a roller to remove the air. The mat
layer is applied in a similar way. The new lamination layers are dandified with glass silk
tape. Also here care must be taken that the glass silk band is with a 50 % overlap winded
and well impregnated
HDPE WELDING
1- HDPE Butt Welding:
HDPE pipe is butt fused by applying heat to prepared pipe ends and then pushing the
pipe ends together with a pre-determined force to make a permanent butt fusion joint. It
is a very simple process utilizing a properly sized butt fusion machine for the pipe size to
be joined. The pipe is installed and clamped in the butt fusion machine with pipe
supports on both ends of the machine to support the pipes on the machine center line.
The pipe ends are then faced (machined) to mechanical stops to ensure clean, parallel
pipe ends for the heating process.
2- HDPE Electro fusion Joining:
Electro fusion is a simple method of joining PE pipes in circumstances where butt fusion
is not practicable, such as where valves, elbows, and tees must be added. Prefabricated
fittings are used, incorporating an electrical heating coil which melts the plastic of both
the fitting and the pipe, causing them to fuse together.
