1.0.1 This code is formulated with a view to implement the national technical and economical policies in design of the building grounds, foundations, that the design can be accomplished with safety and usability, using advanced technology, with economy and rationality, assuring the quality and protecting the environment.
1.0.2 Design of the building grounds, foundations must persist in the principles of suiting measures to local conditions, using local materials, protecting the environment and economizing on the resources; the design shall be painstakingly performed, considering the factors comprehensively as the type of structures, the availability of materials and the construction conditions etc., according to the geotechnical survey data of rocks, soils.
1.0.3 This code is applicable to the design of grounds, foundations of industrial and civilian buildings (including structures). For the design of grounds, foundations in the collapsible loess, the perennial frozen soil and the swelling soil, as well as, under the action of seismic load and vibrating load of machines, that the requirements in the current relevant standards or codes of the nation shall also be complied with.
1.0.4 When this code is used for design, the values of loads shall meet the requirements in the current National Standard “Load Code for the Design of Building Structures” GB 50009; the calculation of foundations shall also meet the requirements of the National Standard “Code for Design of Concrete Structures” GB 50010 and “Code for Design of Masonry Structures” GB 50003. When the foundations are laid in aggressive environment or are subjected to temperature influence, that the requirements in the current relevant mandatory standard of the nation shall also be complied with, and the corresponding protective measures shall be taken.
1 General Provisions
2 Terms and Symbols
2.1 Terms
2.2 Main Symbols
3 Basic Requirement
4 Classification of Geotechnical Rocks, Soils and Their Engineering Property Indexes
4.1 Classification of Rocks, Soils
4.2 Engineering Property Indexes
5 Calculation of Ground
5.1 Embedded Depth of Foundation
5.2 Calculation of Load-bearing Capacity
5.3 Calculation of Deformation
5.4 Calculation of Stability
6 Ground in Mountainous Region
6.1 General Requirement
6.2 Soil-rock Composite Ground
6.3 Compacted Fill Ground
6.4 Landslide Prevention
6.5 Karst and Earth Cave
6.6 Soil Side Slope and Gravity Retaining Wall
6.7 Rock Side Slope and Rock Anchored Bolt Retaining Wall
7 Feeble Ground
7.1 General Requirement
7.2 Utilization and Treatment
7.3 Architectural Measures
7.4 Structural Measures
7.5 Large Area Ground Surface Load
8 Foundations
8.1 Unreinforced Spread Foundation
8.2 Spread Foundation
8.3 Strip Footing under Columns
8.4 Raft Foundation for Tall Buildings
8.5 Pile Foundation
8.6 Rock Anchored Bolt Foundation
9 Foundation Pit Engineering
9.1 General Requirement
9.2 Design Calculation
9.3 Underground Diaphragm Wall and Top-down Construction Method
10 Inspection and Supervision
10.1 Inspection
10.2 Supervision
Appendix A Division of the Hardness Degree of Rocks and the Completeness Degree of Rock Masses
Appendix B Field-distinction of Broken Stone Soil
Appendix C Main Points of Shallow Stratum Plate-loading Test
Appendix D Main Points of Deep Stratum Plate-loading Test
Appendix E Characteristic Value of Shear Strength Indexes c,
Appendix F Map for the Standard Frozen Depth Lines of Seasonal Frozen soil in China
Appendix G Classification for the Frost Heaving Property of Ground Soil and the Maximum Depth of Allowable Remainder Frozen Soil Stratum under Foundation Base of Buildings
Appendix H Main Points for Loading Test of Rock Ground
Appendix J Main Points for Uniaxial Compression Strength Test of Rock
Appendix K Coefficient of Additional Stress α and Coefficient of Average Additional Stress
Appendix L Coefficient of Active Earth Pressure ka for Retaining Wall
Appendix M Main Points for Pull-out Resistant Test of Rock Anchored Bolt
Appendix N Calculation for Additional Settlement Amount of Ground under the Action of Large Area Ground Surface Load
Appendix P Calculating Formulae for the Perimeter of Critical Section and the Polar Moment of Inertia for Punching Shear
Appendix Q Main Points for Vertical Static Loading Test of Single Pile
Appendix R Calculation for Final Settlement of Pile Foundation
Appendix S Sectional Width for Inclined Section Subjected to Shear of the Stepped Capping and the Cone Capping
Appendix T Main Points for Calculation of the Pile-type, the Wall-type Cantilevered Retaining Structures
Appendix U Main Points for Calculation of the Pile-type, the Wall-type Anchor Bracing Retaining Structures
Appendix V Checking Computation for the Stability of Swelling Resistant of Foundation Pit Base
Appendix W Checking Computation for the Stability of Seepage Flow Resistant of Foundation Pit Base
Explanation of Wording in This Code
