1.0.1 The Specifications is formulated with a view to improving the design quality and technical level of cement concrete pavement of civil airports and to ensuring the safety, reliability and economic rationality of pavement structure.
1.0.2 The Specifications is applicable to the cast-in-situ cement concrete pavement design of runway, taxiway and apron of civil airports.
1.0.3 The airport cement concrete pavement shall be designed according to the scale, purpose, aircraft characteristics and transportation load of the airport and in combination with the local climate, hydrological and geological conditions, materials, construction technology, maintenance conditions, etc.
1.0.4 In addition to the requirements stipulated in the Specifications, the design of cement concrete pavement also shall comply with the current relevant standards of the nation.
2 Terminologies and Symbols
2.1 Terminologies
2.1.1 Cement concrete pavement
The pavement composed of cement concrete slab, base course and cushion course (not being laid sometimes).
2.1.2 Plain concrete pavement
The non-reinforced cement concrete pavement, excluding joint zone and local areas.
2.1.3 Reinforced concrete pavement
The cement concrete pavement with longitudinal and transverse reinforcement being distributed in concrete slab in order to prevent potential crack and gap propagation.
2.1.4 Concrete overlay
The cement concrete surface course overlaid on original cement concrete pavement so as to enhance its load-bearing capacity or improve the surface property.
2.1.5 Pavement-bed
The earth base part within the scope of 0.80m below the bottom surface of pavement, which is divided into two parts, i.e., upper pavement-bed (0~0.3m) and lower pavement-bed (0.3~0.8m).
2.1.6 Roller compacted concrete
The cement concrete formed via vibration rolling.
2.1.7 Lean concrete
The cement concrete with low cement content.
2.2 Symbols
AS - the area of reinforcement required for each linear meter of slab, mm2;
At - the area of reinforcement for the tie bar at the longitudinal joint of each concrete slab, mm2;
b - the distance from longitudinal joint of tie bar to the nearest longitudinal joint or free edge, m;
Bm - the average soil consistency;
C - the thickness reduction coefficient of old concrete slab;
Dc - the spacing of transverse joints during calculation of longitudinal reinforcement; the slab width during the calculation of transverse reinforcement, m;
dt - the diameter of reinforcement used for tie bar, mm;
Ec - the flexural-tensile elastic modulus of concrete, MPa;
fcm - the concrete design strength, MPa;
G - the aircraft weight, kN;
h - the thickness of concrete slab, mm;
hc - the thickness of overlay, mm;
he - the thickness of old concrete slab, mm;
hf - the equivalent thickness of single-layer concrete slab equal to the design overlay strength, mm;
hje - the equivalent thickness of base course, mm;
H1 - the critical water level height of earth base at dry state, m;
H2 - the critical water level height of earth base at medium wet state, m;
H3 - the critical water level height of earth base at wet state, m;
k0 - the reaction modulus of earth base, MN/m3;
kj - the reaction modulus of top surface of base course, MN/m3;
la - the length of tie bar, mm;
lc - the length of concrete slab, m;
lp - the rigid radius of concrete pavement, mm;
- the rigid radius length on influence diagram, mm;
Lt - the length of one wheel print of the aircraft main landing gear, mm;
- the wheel print length on transparent paper, mm;
Me - the slab edge bending moment, MN·m/m;
nc - the number of main landing gears;
nw - the number of wheels of one main landing gear;
ne - the accumulated action times of aircraft within design life;
Nb - the number of small grids within the scope of wheel print on influence diagram;
Ne - the allowable action times of aircraft within design life;
Ns - the annual average operating times of aircraft within design life;
p - the load distribution coefficient of main landing gear;
Pt - the wheel load on the main landing gear of aircraft, kN;
q - the tyre pressure of the aircraft main landing gear, MPa;
t - the design life;
T - the traffic width, m;
Wt - the width of one wheel print of the aircraft main landing gear, mm;
- the wheel print width on transparent paper, mm;
Za - the allowable bond stress between tie bar reinforcement and concrete, MPa;
β - the stress reduction coefficient;
σa - the allowable reinforcement stress, MPa;
σe - the slab edge stress, MPa;
σp - the calculated slab edge stress, MPa;
μc - the Poisson's ratio of concrete;
ωL - the liquid limit water content of soil, %;
ωm - the average water content of soil, %;
ωp - the plastic limit water content of soil, %.
1 General Provisions 2 Terminologies and Symbols 2.1 Terminologies 2.2 Symbols 3 Design Parameters 4 Combinational Design of Structure Layers 4.1 General Requirements 4.2 Earth Base 4.3 Cushion Course 4.4 Base Course 4.5 Cement Concrete Slab 4.6 Shoulder Structure 5 Thickness Calculation of Plain Concrete Slab 6 Block Design 7 Joint Design and Jointing Materials 7.1 Joint Design 7.2 Jointing Materials 8 Treatment of Concrete Slab at Special Parts 8.1 Design of Reinforced Concrete Slab 8.2 Local Reinforcing of Slab 8.3 Treatment of Concrete Slab at Pavement Joint and Pipe Ditch 9 Design of Overlay on Old Concrete Pavement Appendix A Table of Aircraft Parameters Used for Pavement Design Appendix B Test Method for Reaction Modulus of Earth Base Appendix C Reference Value of the Critical Height of Earth Base Appendix D Basic Requirements for Component Materials of Cement Concrete Appendix E Influence Diagram of Slab Edge Bending Moment Appendix F Allowable Reinforcement Stress Appendix G Treatment of Old Pavement Appendix H Explanation of Wording in the Specifications
1 General Provisions
1.0.1 The Specifications is formulated with a view to improving the design quality and technical level of cement concrete pavement of civil airports and to ensuring the safety, reliability and economic rationality of pavement structure.
1.0.2 The Specifications is applicable to the cast-in-situ cement concrete pavement design of runway, taxiway and apron of civil airports.
1.0.3 The airport cement concrete pavement shall be designed according to the scale, purpose, aircraft characteristics and transportation load of the airport and in combination with the local climate, hydrological and geological conditions, materials, construction technology, maintenance conditions, etc.
1.0.4 In addition to the requirements stipulated in the Specifications, the design of cement concrete pavement also shall comply with the current relevant standards of the nation.
2 Terminologies and Symbols
2.1 Terminologies
2.1.1 Cement concrete pavement
The pavement composed of cement concrete slab, base course and cushion course (not being laid sometimes).
2.1.2 Plain concrete pavement
The non-reinforced cement concrete pavement, excluding joint zone and local areas.
2.1.3 Reinforced concrete pavement
The cement concrete pavement with longitudinal and transverse reinforcement being distributed in concrete slab in order to prevent potential crack and gap propagation.
2.1.4 Concrete overlay
The cement concrete surface course overlaid on original cement concrete pavement so as to enhance its load-bearing capacity or improve the surface property.
2.1.5 Pavement-bed
The earth base part within the scope of 0.80m below the bottom surface of pavement, which is divided into two parts, i.e., upper pavement-bed (0~0.3m) and lower pavement-bed (0.3~0.8m).
2.1.6 Roller compacted concrete
The cement concrete formed via vibration rolling.
2.1.7 Lean concrete
The cement concrete with low cement content.
2.2 Symbols
AS - the area of reinforcement required for each linear meter of slab, mm2;
At - the area of reinforcement for the tie bar at the longitudinal joint of each concrete slab, mm2;
b - the distance from longitudinal joint of tie bar to the nearest longitudinal joint or free edge, m;
Bm - the average soil consistency;
C - the thickness reduction coefficient of old concrete slab;
Dc - the spacing of transverse joints during calculation of longitudinal reinforcement; the slab width during the calculation of transverse reinforcement, m;
dt - the diameter of reinforcement used for tie bar, mm;
Ec - the flexural-tensile elastic modulus of concrete, MPa;
fcm - the concrete design strength, MPa;
G - the aircraft weight, kN;
h - the thickness of concrete slab, mm;
hc - the thickness of overlay, mm;
he - the thickness of old concrete slab, mm;
hf - the equivalent thickness of single-layer concrete slab equal to the design overlay strength, mm;
hje - the equivalent thickness of base course, mm;
H1 - the critical water level height of earth base at dry state, m;
H2 - the critical water level height of earth base at medium wet state, m;
H3 - the critical water level height of earth base at wet state, m;
k0 - the reaction modulus of earth base, MN/m3;
kj - the reaction modulus of top surface of base course, MN/m3;
la - the length of tie bar, mm;
lc - the length of concrete slab, m;
lp - the rigid radius of concrete pavement, mm;
- the rigid radius length on influence diagram, mm;
Lt - the length of one wheel print of the aircraft main landing gear, mm;
- the wheel print length on transparent paper, mm;
Me - the slab edge bending moment, MN·m/m;
nc - the number of main landing gears;
nw - the number of wheels of one main landing gear;
ne - the accumulated action times of aircraft within design life;
Nb - the number of small grids within the scope of wheel print on influence diagram;
Ne - the allowable action times of aircraft within design life;
Ns - the annual average operating times of aircraft within design life;
p - the load distribution coefficient of main landing gear;
Pt - the wheel load on the main landing gear of aircraft, kN;
q - the tyre pressure of the aircraft main landing gear, MPa;
t - the design life;
T - the traffic width, m;
Wt - the width of one wheel print of the aircraft main landing gear, mm;
- the wheel print width on transparent paper, mm;
Za - the allowable bond stress between tie bar reinforcement and concrete, MPa;
β - the stress reduction coefficient;
σa - the allowable reinforcement stress, MPa;
σe - the slab edge stress, MPa;
σp - the calculated slab edge stress, MPa;
μc - the Poisson's ratio of concrete;
ωL - the liquid limit water content of soil, %;
ωm - the average water content of soil, %;
ωp - the plastic limit water content of soil, %.
Contents of MH/T 5004-2010
1 General Provisions
2 Terminologies and Symbols
2.1 Terminologies
2.2 Symbols
3 Design Parameters
4 Combinational Design of Structure Layers
4.1 General Requirements
4.2 Earth Base
4.3 Cushion Course
4.4 Base Course
4.5 Cement Concrete Slab
4.6 Shoulder Structure
5 Thickness Calculation of Plain Concrete Slab
6 Block Design
7 Joint Design and Jointing Materials
7.1 Joint Design
7.2 Jointing Materials
8 Treatment of Concrete Slab at Special Parts
8.1 Design of Reinforced Concrete Slab
8.2 Local Reinforcing of Slab
8.3 Treatment of Concrete Slab at Pavement Joint and Pipe Ditch
9 Design of Overlay on Old Concrete Pavement
Appendix A Table of Aircraft Parameters Used for Pavement Design
Appendix B Test Method for Reaction Modulus of Earth Base
Appendix C Reference Value of the Critical Height of Earth Base
Appendix D Basic Requirements for Component Materials of Cement Concrete
Appendix E Influence Diagram of Slab Edge Bending Moment
Appendix F Allowable Reinforcement Stress
Appendix G Treatment of Old Pavement
Appendix H Explanation of Wording in the Specifications
