Topic. II.9. Sewerage Facilities. Manholes and Street Inlets

1
Topic. II.9. Sewerage Facilities.Manholes and
Street Inlets

• Kinds of Sewerage Facilities
• Facilities for the sewer network inspection,
  maintenance and operation
• Manholes
• Street inlets
• Overflows
• Facilities for wastewater quantity and quality
  regulation
• Flow regulation chambers
• Retention basins
• Inception shafts
• Wastewater precipitation units

2
Manholes

• Manholes Positioning
• On every horizontal and vertical turn of the
  sewer permanent way
• On the points of sewer pipes diameter or material
  change
• On the points of sewer branches joining to the
  receiving collectors
• On strait reaches in maximum distances - lmax, as
  follows
• At pipe diameters D lt 200 mm ? lmax 40 m
• At pipe diameters D lt 450 mm ? lmax 60 m
• At pipe diameters D lt 600 mm ? lmax 80 m
• At pipe diameters D lt 900 mm ? lmax 100 m
• At pipe diameters D lt 1500 mm ? lmax 150 m
• At pipe diameters D gt 1500 mm ? lmax 200 m
• Manholes kinds
• Standard (prefabricated) manholes
• Individually designed and constructed manholes

3
Manholes

• Manholes Cunettes

4
Manholes

• Standard Prefabricated Reinforced Concrete Manhole

5
Manholes

• Individually Designed Reinforced Concrete Manholes

6
Manholes

• Reinforced Concrete Manhole

7
Street Inlets

• Street Inlets Kinds
• At combined sewer system
• With catch basin (catch pot)
• Without catch basin
• At separate sewer system (drainage network)
• Without catch basin
• Street Inlets Positioning
• At every sewer manhole
• On strait reaches
• Maximal distance depending on the street width
• Maximal distance depending on the street slope

8
Street Inlets

• Street Inlets Positioning

9
Street Inlets
10
Street Inlets
11
Street Inlets

• Street Inlets with Catch Basin

12
Street Inlets

• Street Inlet without Catch Basin