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REHABILITATION OF THE MOSTAR |
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NEWSLETTER 8 FEBRUARY 28, 2003 MOSTAR, BOSNA AND HERCEGOVINA |
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Centering by night
Works on
the centering are at full power. With spring coming, days are longer as well
as the working hours. From early morning until the sunset, it is very
livelily on the site.
Mounting of the heavy scaffold We are in a
phase where every part of executed work is vivid for the public. Great
interest of the citizens of Mostar is evident on the pedestrian bridge, and a
large number of journalist crews from the country and the whole
world are
Heavy scaffold with height regulators and beams Concrete
pillars with temporal geotechnical anchors have been straitened before
mounting of the bridge stones. There are 8 anchors of 15 m length.
Drilling
for geotechnical anchors GEOTECHNICAL ANCHORS
Geotechnical
anchors are built in on locations where it is necessary to take over enormous
concentrated forces. Temporal geotechnical anchors can be in function max 3
years.
Workers and borer beneath the concrete pillar Drilling of
soil and testing of the drill by specialized crew was done before building in
of geotechnical anchors. At the same time it is necessary to concrete the
anchor block along with building in the “spiral” on the location of anchor’s
passage and “outlet” for injection and fazes.
Drilling of upstream pillar on the left bank VISIT OF THE WORLD BANK REPRESENTATIVES
On 24th
and
Mr. Hannah during a visit to the site After a
short informative meeting with Mr.Rusmir Čišić and Mr.Tihomir Rozić in the premises of Project Coordination Unit for
reconstruction of Old Bridge, the guests went for a turn around the site. Representatives
of Supervision and Contractor informed them of all previous work phases on
the bridge. Representatives of the World Bank got detailed and full reports
on dismantling of bridge remnants, archaeological excavations, repair and
injection of abutment walls, centering and other interesting and important
tasks which occurred and those that yet follow.
Ms. Frančić and Mr. Hannah
during a visit to Supervision Members of
the World bank did not hide their satisfaction for all they have seen on the
site and around the site during their visit to Mostar. On regular
press conference, held in premises of Mr.Hannah
answered that this is a pilot project of the World bank, first of its kind
ever approved, and they are more then satisfied with the work progress so
far. World bank sees Mostar as important tourist center, according to their
opinion the reconstruction of Old bridge will contribute to enlargement of
its tourist potential. That means, after a new tender,
archaeological works will be continued on both banks, within the area of
towers.
East
part of the quadrant on left bank More precisely, archaeological explorations
were finished on Archaeological
findings are very interesting on both sides. Several masonry structures were
found, some of those can be assigned to anterior bridges, in
other words most probably two bridges existed. Those masonry structures are
on both sides of Neretva and they developed at the same time (meaning that
findings we discover on one side are found on the other too). In the
springer we reached the sterile layer, the rocky mass. Earth layer of over 8m
of height which additionally burdened the spandrel walls was excavated, so
they will be disburdened now. These excavations gave us the possibility to
quality restore foundation walls on both sides.
Quadrant on
right bank RECORDED FINDINGS The oldest findings date from 15th
century. Archaeological findings are recorded in details in all layers and
documentation is made which involves treatment of all recorded archaeological
findings, contexts, photos and plan view with cross-sections and it will be
published in scientific literature. Findings are sent to |
witnessing
that this project is certainly the most interesting reconstruction project in
the world. In newly
opened information center, which is in immediate proximity of the site, all
those who are interested can get information of work progress, talk to
authorized staff, take a look at prepared material etc. MOUNTING OF THE CENTERING
The centering with beams and portal crane path The public
was already informed of mounting the steel trusses construction. The next
phase is mounting of centering, which consists of various elements. Transversal
girders were mounted on main steel trusses construction (HEB 40), and foots
were welded on it for mounting the heavy steel scaffold f
159/150 mm. After
mounting the heavy scaffold (which follows the arch), its consolidation with
light scaffold f
48 mm began. Height regulators are mounted on the heavy scaffold, and
beams of Foots for mounting of heavy steel scaffold dimensions
24/20 cm, so called covers, on which wooden half-circled planks are placed (6
pcs) and final phase of flooring manufacture (preparation for placing the stones).
Along with
mounting of the centering, mounting of the portal crane construction is also
in progress. After mounting of the centering and portal crane construction,
stiffening of main steel trusses construction is conducted. Manufacture
of geotechnical anchors is done on polygon near the object and it involves:
Preparation of lining for modeling
and forming the anchor Straitened anchors on right upstream bank
Preparation of metal tube with
tined edge for connection with plastic pipe
Preparation of plastic pipe
Connecting the plastic and metal
pipe
Preparation of metal allotter for
crouching and spreading of ropes as well as outer separators.
Preparation of protection pipe
Cutting the ropes on needed length
Pulling of outer separators on ropes
Fixing by welding the metal
allotter on metal pipe and placing the ropes
Placing the protection pipe over
the ropes and plastic pipes for injection with closing of joint on the pipe
end, towards anchorage zone
Placing the lining plate with
funnel, and fixing the end of funnel on the protection pipe
Transit and insertion into anchor
drill. Geotechnical anchors
Dowels in the stone TESTING IN KOMOS Storage
Komos in Opine near Mostar, which is a part of the construction site, is also
very livelily these days. Test stone chiseling is done there, also all kinds
of joints, mortars, building in cramps and dowels, pouring with lead, and
other work that will be done on the site during arch construction.
Removed
dowels poured with lead ARCHAEOLOGICAL
REPORT
After sounding exploration of towers, which
was done at the end of 2001 and beginning of 2002, archaeological work on
both sides of the arch was continued during October 2002. Those works lasted
until the beginning of March when they were stopped until the continuance of
works on towers.
Quadrant on the right bank
Remnants of wooden plumbing will be returned and placed in future archaeological
museum. On location we found about 200 pieces of
pottery (date form 15th to 20th century – each piece
will be separately described in formulary and drown in scale 1:1, and
restoration of pots
will be attempted too),
about 20 stone cannon
balls and
Remnants of mattock 1 metal, about 250 metal wedges of wooden
bridge construction, 1 copper coin and several pieces of middle-age tools. These
researches, which will be continued, integrated and modified the image of
site development so it also changed the image we gave in the preliminary
report after sounding study of the towers. Meaning these findings rather
changed the flow of construction, as to, they gave more elements for precise timing
of specific walls. It is important to mention that walls interlace and there
are walls from different stages of construction.
Wedge from
wooden bridge |
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This NEWSLETTER was made in accordance with prevailing articles of the
Contract No 002/2002 about the Rehabilitation of the