TM 5-809-6/AFM 88-3, Chap. 6
CHAPTER 6
WATER RELATED STRUCTURES EXCEPT STORAGE TANKS
6-1. General
selection of pipeline materials and layout to assure that
proper allowance has been made for these forces as well as
Design of water related structures will comply with the need
expansion movements, etc.
to maintain watertight and durable construction. In this
interest, design of concrete structures will be in accordance
6-4. Water and wastewater treatment facilities
with the recommendations of ACI 350R. Where appropriate,
a. General. Design of water supply facilities will be in
water related concrete structures will be designed as
hydraulic structures. Additional design guidance will be
accordance with TM 5-813-1/AFM 88-10, Volume 1; TM
obtained from applicable design agency reference documents
5-813-4/AFM 88-10, Volume 4; and ASCE Water Treat-
and the Handbook of Concrete Engineering by Fintel.
ment Plant Design. Design of wastewater treatment facilities
will be in accordance with TM 5-814-3/AFM 88-11,
6-2. Intake and discharge structures
Volume 3 and WPCF MOP8CTG.
b. Basins and similar construction. Structures such as
Intake and discharge structures, such as for power plants and
primary settling basins, clear wells, sedimentation tanks,
pumping stations, will be designed to sustain wave forces,
Imhoff tanks, filters, sludge digesters, and similar structures
hydrostatic pressures, earth pressures, surcharges, and other
will be designed in accordance with concepts set forth in
superimposed loads. Trash racks and screens will be
earlier paragraphs under the discussion of structures for bulk
provided. The amount of trash, debris, or seaweed expected
liquid materials and TM 5-814-3/AFM 88-11, Volume 3.
to accumulate in intake structures will be the primary
Pipeline support structures, sluice gates, equipment
consideration in deciding whether or not a continuously
foundations, and other miscellaneous structures will be
cleaning mechanical traveling screen will be used. Design
designed in accordance with criteria given elsewhere in this
will consider the maximum permissible differential head
manual and current standard practices. Manufacturer*s
across the trash rack or screening device.
recommended designs may also be considered.
6-3. Water transmission lines
6-5. Underground structures
Design of water transmission lines will include consideration
Design of underground structures associated with water
of items such as maintaining watertightness, avoiding
related facilities, e.g., manholes, pits, etc., will comply with
erosive velocities, and providing gradual transitions in cross-
criteria for manholes and inlets in paragraph 4-1. Paved
section and alignment. Structures will be designed to carry
inverts and similar details will be provided as required for
the weight of the aqueduct or pipeline with fluid and to resist
the particular system being incorporated. Applicable por-
loads due to wind, snow, and seismic activity. Reaction
tions of ASTM C 32, C 857, and C 858 will also be con-
blocking will be designed and provided where necessary to
sidered.
resist forces due to pressure, thrust, impact, water hammer,
etc. The structural design will be coordinated with the
6-1
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