SITUATIA EXISTENTA 001
Dreapta- de sus in jos:
Centru: manhole cover axis/
centre line
Cast iron manhole cover
Cast iron manhole frame
Existing road system
Existing foundation
Existing vertical manhole walls(*)
Reinforced concrete slab (**)
Irrespective of the plan dimensions of the existing reinforced concrete slab on which the cast iron cover rests,
the details that follow are consistent
* The manhole walls may be made out of concrete, stone or brick masonry, which does not influence the
following details of the cast iron frames.
** The existing reinforced concrete slabs on which the cast iron frames rest can be all cast with the manhole
wall or rest on these. This does not influence the details.
- Notice that irrespective of the the plan dimensions of the existing reinforced concrete slab, the following
details will not be modified; in this case overconcreting will continue over the whole surface of the existing
slab.
Any possible decay of manhole walls and/or slabs which might involve works additional to the ones
included in the present details, are the responsibility of the network Administrator whose duty is to repair
at their own expenses and in due time the existing damage of manholes and slabs without delaying the work
schedule of the General Antrepreneur of the repair works.
STAGE II 002
LAYING REINFORCEMENT LAYERS EXCEPTING ROAD WEAR
STg: final binder layer level (cf. design)
Existing asphalt level
final road wear level (cf. design)
Dreapta: - Leveling with binder
- constant mixture layer
- leveling with mixture
Existing asphalt layers
Existing ballast foundation
Existing manhole vertical walls
Existing reinforced concrete slab
NOTE:
- (*) / (**) The reinforcement asphalt layers under the road wear correspond to the typical cross sections
- The cross slope and the declivity are the ones stipulated by the design after the reinforcement layers
have been laid.
STAGE III 003
Stanga:
- Final binder level
- Existing asphalt level
- Cast iorn frame initial bearing level
- binder layer, total thickness equaling the thickness of the layer laid in Step II (**) over the
suprabetonare slab
- reinforcing the existing slab by pouring all-cast concrete (C25/30) over the existing
- posing common mortar
- existing vertical manhole walls
Note:
-(*) Minimum 9 cm asphalt layers (including road wear) must be laid over the concrete slab. In acest sens
se va cobora, if necessary, cota superioara a dalei de suprabetonare.
-(**) independent of the composition of the reinforcement layers, the binding in STAGE III will be carried
out with binder only.
-(***) It is possible to give up posing the cast iron frame on a M100 mortar layer if 2 cross frames are used
instead . The frames will be removed the day after the concrete is laid
- Before laying concrete, the surface of the existing slab will be granulated to enhance roughness, then it
will be primed with cement milk.
LATERAL DREAPTA:
Existing asphalt layers
Existing ballast foundation
- concrete type
C25/30 (Bc03)
- cement type
I 32.5 (R)
- class of exposure
- frost cleftness degree
- impermeability degree
- max. a/c ratio
- SE VOR FOLOSI …ADITIVI ANTRENORI DE AER…
- using cement with less than 95% clinker is forbidden
dala de beton armat existenta _ existing reinforced concrete slab
DESIGNED SOLUTION 004
Stanga: overconcreting the existing slab
Dreapta: final wear level (cf. design)
Existing road system
Existing foundation
Mijloc: manhole cover axis
Note:
- Any cracked frames and/or frame/cover units or severely damaged as to endanger traffic will be
replaced by new ones.
-
All the work necessary for achieving the designed frame level will be carried out in the presence of an
authorized representative of the Owner of the network.
SITUATIA EXISTENTA – 005
STANGA SUS: holes for methane gas ventilation in case of leaks due to existing imperfect joints
Ventilation hole axis
Dreapta:
- existing asphalt layers
- existing foundation
- PAUZA
- Existing earth fill (layer) where the methane gas pipe is located
- Existing welded methane gas pipe sections
- JOS: existing welded joint(*)
Note:
- (*)A welded joint corresponds to each ventilation hole – aprox. Correct ??
- Additional works due to damage to the gas or ventilation pipe network are the responsibility of the
network Administrator whose duty is to repair at their own expense and in due time the existing damage
to the gas network and to the ventilation pipes up to the frame/cover unit level without causing any delay
to the schedule of the General Antrepreneur of the repair works.
STAGE II 006
(laying reinforcement layers except for the (road) wear)
final binder level
final road wear level
- leveling with binder
- constant mixture layer
- leveling with mixture
-
existing asphalt layers
exsiting ballast foundation
methane gas
DANGER OF EXPLOSION
existing welded joint
NOTE:
-(*) at this stage, after each asphalt layer is laid and rolled a core will be cut (on the same day) so as to avoid gas
accumulation as a result of possible leaks, which might lead to explosions. To this purpose pouring asphalt over
the ventilation holes will be assisted also by an authorized representative of RA ROMGAZ.
(**_/ (***) the reinforcement asphalt layers under the road wear
STAGE III 007
Final binder level- cf. design
final (road) wear level – cf. design
Existing asphalt level
-pipe section ( 5 ..6 cm) welded to the
existing one with vent holes at the end
Lower TALPA frame initial level/ thickness
- existing asphalt layers
Ballast stabilized with tamped cement at
the thickness of existing asphalt layers
- existing ballast foundation
tamped ballast foundation - 10 cm
Note:
- (*) Min(imum) 12 cm. asphalt layers (including wear) must be laid over the ballast stabilized/ mixed
with 6% cement. In this case the upper level of the stabilized ballast could be lowered, if necessary.
- The connection with binder in STAGE III shall be carried out with binder only, irrespective of the
composition of reinforcement layers.
- the compaction degree of the binder around the cast iron ventilation hole frame
DESIGNED SOLUTION 008
Final wear level (cf design)
Existing asphalt layers
Existing foundation
Concrete for manhole superelevation
Methane gas
DANGER OF EXPLOSION
Note:
- Any cracked frames and/or frame/cover units or severely damaged as to endanger traffic will be
replaced by new ones. DE CATRE CINE???
- All the work necessary for achieving the designed frame level will be carried out in the presence of an
authorized representative of the Owner of the INSTALATIE
EXISTING SITUATION – 009
Note:
- (*) the seepage manhole walls are concrete pipes 500 mm
- Possible damage to the pipes that may request works additional to the provisions of these details shall