Sewer pipe structures and their method of construction

A pipe section for use as a stilling pond in a sewer pipe structure, the pipe section comprising a pair of arcuate sections of pipe attached in parallel spaced apart relationship to the internal surface of the pipe section in a lower part of the pipe section, the pair of arcuate sections of pipe forming benching for the pipe section and defining therebetween a generally V-shaped channel narrowing towards the base of the pipe section.

A pipe section for use as a weir section in a sewer pipe structure, the pipe section comprising a side weir extending longitudinally of the pipe section, the side weir being formed by a free edge of a channel which is attached to the interior surface of the pipe section to extend longitudinally along the pipe section in an upper part of the pipe section, the base of the channel being spaced above the base of the pipe section.

A pipe section for use as a transfer unit in a sewer pipe structure, the pipe section having a first cross-section and the pipe section carrying a smaller cross-section pipe attached to an upper part of an interior surface of the pipe section, the smaller cross-section pipe carrying therethrough a flow of overflow water separated from a main flow of sewage or sewage/water mixture.

A pipe section for use as a weir section in a sewer pipe structure, the pipe section comprising a weir extending transversely across the pipe section, the weir formed from an arcuate section of pipe.

A sewer pipe structure comprising a plurality of pipe sections joined together, said plurality of pipe sections including:

• a first pipe section for use as a stilling pond in the sewer pipe structure, the first pipe section comprising a pair of arcuate sections of pipe attached in parallel spaced apart relationship to the internal surface of the pair of arcuate sections of pipe forming benching for the first pipe section and defining therebetween a generally V-shaped channel narrowing towards the base of the first pipe section;
• and
• a second pipe section for use as a weir section in the sewer pipe structure, the second pipe section comprising a side weir extending longitudinally of the second pipe section, the side weir being formed by a free edge of a channel which is attached to the interior surface of the second pipe section to extend longitudinally along the second pipe section in an upper part of the second pipe section, the base of the channel being spaced above the base of the second pipe section.

A sewer pipe structure comprising a plurality of pipe sections joined together, said plurality of pipe sections including:

• a first pipe section for use as a stilling pond in the sewer pipe structure, the first pipe section comprising a pair of arcuate sections of pipe attached in parallel spaced apart relationship to the internal surface of the pair of arcuate sections of pipe forming benching for the first pipe section and defining therebetween a generally V-shaped channel narrowing towards the base of the first pipe section;
• and
• a second pipe section for use as a transfer unit in the sewer pipe structure, the second pipe section comprising a first cross-section and the second pipe section carrying a smaller cross-section pipe attached to an upper part of the interior surface of the second pipe section, the smaller cross-section pipe carrying therethrough a flow of overflow water separated from a main flow of sewage or sewage/water mixture.

A sewer pipe structure comprising a plurality of pipe sections joined together, said plurality of pipe sections including:

• a first pipe section for use as a stilling pond in the sewer pipe structure, the first pipe section comprising a pair of arcuate sections of pipe attached in parallel spaced apart relationship to the internal surface of the pair of arcuate sections of pipe forming benching for the first pipe section and defining therebetween a generally V-shaped channel narrowing towards the base of the first pipe section;
• and
• a second pipe section for use as a weir section in the sewer pipe structure, the second pipe section comprising a weir extending transversely across the second pipe section, the weir formed from an arcuate section of pipe.

A sewer pipe structure comprising a plurality of pipe sections joined together, said plurality of pipe sections including:

• a first pipe section for use as a weir section in the sewer pipe structure, the first pipe section comprising a side weir extending longitudinally of the first pipe section, the side weir being formed by a free edge of a channel which is attached to the interior surface of the first pipe section to extend longitudinally along the first pipe section in an upper part of the first pipe section, the base of the channel being spaced above the base of the first pipe section;
• and
• a second pipe section for use as a transfer unit in the sewer pipe structure, the second pipe section comprising a first cross-section and the second pipe section carrying a smaller cross-section pipe attached to an upper part of the interior surface of the second pipe section, the smaller cross-section pipe carrying therethrough a flow of overflow water separated from a main flow of sewage or sewage/water mixture.

A sewer pipe structure comprising a plurality of pipe sections joined together, said plurality of pipe sections including:

• a first pipe section for use as a weir section in the sewer pipe structure, the first pipe section comprising a side weir extending longitudinally of the first pipe section, the side weir being formed by a free edge of a channel which is attached to the interior surface of the first pipe section to extend longitudinally along the first pipe section in an upper part of the first pipe section, the base of the channel being spaced above the base of the first pipe section;
• and
• a second pipe section for use as a weir section in the sewer pipe structure, the second pipe section comprising a weir extending transversely across the second pipe section, the weir formed from an arcuate section of pipe.

A sewer pipe structure comprising a plurality of pipe sections joined together, said plurality of pipe sections including:

• a first pipe section for use as a transfer unit in the sewer pipe structure, the first pipe section comprising a first cross-section and the first pipe section carrying a smaller cross-section pipe attached to an upper part of the interior surface of the first pipe section, the smaller cross-section pipe carrying therethrough a flow of overflow water separated from a main flow of sewage or sewage/water mixture;
• and
• a second pipe section for use as a weir section in the sewer pipe structure, the second pipe section comprising a weir extending transversely across the second pipe section, the weir formed from an arcuate section of pipe.