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The works aiming at the
consolidation of the vault inside the artificial gallery, contemplate
the indexing of rivetings. These ones are placed following an order
and a density proportional to the degree and the kind of fracture in
the rock. |
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Worrying removals of
rock-materials along the vault and the side walls, occurred in the
second room inside the artificial gallery. Therefore, Mr. Dalle Mura
and Mr. Piano (ingeneers) studied an innovative propping system. It
consists of some metallic structures in the shape of a tree, whose
branches are placed so as to prop the vault and the walls. |
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The first indexing of the
dendroid propping structure. In those days the structure consisted
only of the ‘trunk’ and the branch which is bent and outstretched
towards the vault. |
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The artificial gallery
has been consolidated also by means of metallic centrings. In the
specific case represented in this picture, the centring serves even as
a frame to the doors controlling the gas exchanges between the inside
and the outside environment of the cave.
The man in red is the
building surveyor in the employ of the Park of the Apuan Alps: Mr.
Paolo Amorfini.
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Other centrings preceed
the actual entrance to the Corchia’s cave. In the stretch
represented in the picture, the section of the gallery is going to be
opportunely reduced. |
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The first gangways are
visible as you enter the so-called “Galleria Franosa” (the
Landslides Gallery), which is the natural initial part of the cave.
They are made of stainless steel and are firmly fixed in the ground. |
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The metallic structures
in this stretch of the route, seem hanging in space, and slope down
towards the so-called “Galleria degli Inglesi” (the English
Gallery). Here is the stretch of the cave, in course of preparation,
where the works are more advanced. |
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The vault in the second
room of the artificial gallery preceding the entrance in the
Corchia’s cave, has been made safe during the months of January and
February. As this picture shows, the dendroid structure, which was
just slightly sketched out last January, is now defined in details. |
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The inspection made by
the experts of the Park has been continued as far as the first natural
stretch of the so-called “Galleria Franosa” (the Landslides
Gallery).
The picture shows Mrs.
Amorfini Alessia (geologist) during the survey of the progress works.
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An occasion to check the
yard, was given by the necessity of a survey carried out in the ground
and required for another intervention: the external setting of the
area situated around the entrance of the artificial gallery, by means
of naturalistic engineering works. |
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The steel flight, with
its skeleton with no rises and treads, slopes down from the so-called
“Galleria Franosa” (the Landslides Gallery). It is fixed to the
rock only by means of some points of support. |
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The first stalactites
visible in the first third of the so-called “Galleria degli
Inglesi” (the English Gallery). Here, where the stretch is
horizontal and breakingless, no work is necessary to grant the passing
of visitors. |
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Another metallic
structure rises a natural gallery. This is characterized by the
peculiar circular shape due to the erosions caused by the pressure of
the subterranean water. |
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A detail of the building
of the skeleton of a steel bridge. The “small stair” beside,
allows the passing of the service cables. |
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Mr. Amorfini (building
surveyor) in the middle of the bridge over the so-called “Laghetto
del venerd́” (the Friday Pond). |
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Mr. Amorfini engaged in a
crawling rising to get over a steel flight settled, a short time
before, along the galleries inside the Corchia’s cave. |
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A little flight, besides
some fossil concretions, off the so-called “Foresta pietrificata”
(the Petrified Forest). Its indexing avoided damages to any
significant stalgmitic form. |
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Mr. Dalle Mura (engineer)
shows, with the help of a lamp, a rare concretion incorporating some
black oxidizing materials. |
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The picture shows the
inspection and monitoring station, which continually surveys and
monitors the physical and chemical conditions of the Corchia’s cave.
It was settled here by the A.R.P.A.T. |
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The monitoring activity
carried out by the A.R.P.A.T., in accordance with the Regional Park of
The Apuan Alps, is here engaged in the data
collection concerning the presence of the noble gas Radon. |
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