1 Scope
This specification stipulates the requirements for materials, loads, calculations and structures of reinforced concrete tanks in petrochemical industry. This specification is applicable to the structural design of cast-in-place reinforced concrete tanks, non-liquid storage tanks, and underground and semi-underground pump houses in petrochemical industry.
This specification is not applicable to the structural design of prefabricated reinforced concrete tanks, prestressed concrete tanks and open caissons.
This specification does not involve foundation treatment of tanks. Foundation treatment, if required, shall comply with the current national technical specifications on foundation treatment.
2 Normative references
The following documents are indispensable for the application of this specification. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 8076 Concrete admixtures
GB/T 14684 Sand for construction
GB/T 14685 Pebble and crushed stone for construction
GB 23439 Expansive agents for concrete
GB 50010 Code for design of concrete structures
GB 50046 Standard for anticorrosion design of industrial constructions
GB 50119 Code for utility technical of concrete admixture
GB 50191 Design code for antiseismic of special structures
SH/T 3147 Specification for seismic design of special structures in petrochemical industry
SH/T 3535 Specification for construction and acceptance of concrete water pit engineering in petrochemical industry
JGJ/T 178 Technical specification for application of shrinkage-compensating concrete
3 Basic design requirements
3.1 The tanks are classified by their embedded types into underground tanks, semi-underground tanks, ground tanks and overhead tanks, and their classification method shall meet the following requirements:
a) Underground tanks are those whose top elevation is below the ground or not more than 300 mm above the ground;
b) Semi-underground tanks are those with half or more than half of the tank wall height below the ground;
c) Ground tanks are those with more than half of the tank wall height above the ground;
d) Overhead tanks are those whose base slab bottom is above the ground and is elevated by column base or strip base.
3.2 Tanks are generally classified into rectangular tanks and circular tanks according to their shapes.
3.3 Single-cell rectangular tanks without joints may be classified into deep-walled tank, shallow-walled tank and two-way slab-walled tank according to the length to height ratio of tank wall, and the classification method shall be in accordance with those specified in Table 3.3.
3.4 The tanks may be classified into integral type and separated type according to the bottom slab structure.
3.5 The waterproofing of the tanks are divided into four grades, and the waterproofing standards of each grade shall be in accordance with those specified in Table 3.5.
3.6 Water storage test shall be carried out for all tanks, and the test requirements shall be in accordance with SH/T 3535 Specification for construction and acceptance of concrete water pit engineering in petrochemical industry, and shall meet the waterproofing standards specified in Table 3.5.
3.7 Waterproofing grade of common tanks in petrochemical industry should be in accordance with those specified in Table 3.7.
3.8 The concrete impermeability grade of common tanks in petrochemical industry shall be in accordance with those specified in Table 3.8, and the engineering with seepage prevention requirements shall meet the requirements of Technical code for seepage prevention in petrochemical engineering.
Foreword i
1 Scope
2 Normative references
3 Basic design requirements
4 Materials
5 Load and load effect combination
5.1 General requirements
5.2 Permanent load
5.3 Variable load
5.4 Seismic action
5.5 Load effect combination
6 Static calculations
6.1 General requirements
6.2 Static calculations of the rectangular tank
6.3 Static calculations of the circular tank
6.4 Internal force calculation due to temperature (humidity) difference of rectangular tank wall
7 Checking of crack resistance and crack width
7.1 Checking of crack resistance
7.2 Checking of crack width
8 Design for anti-floatage
8.1 General requirements
8.2 Checking of anti-floatage
9 Detailing requirements
9.1 General requirements
9.2 Expansion joint
9.3 Seismic details
Annex A (Informative) Moment coefficient of the two-way slab under soil and ground water pressure
Annex B (Informative) Moment coefficient effected by temperature and humidity difference
Explanation of wording in this specification
